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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2015	Oct. 23, 2015
Entity Registrant Name	IAC/INTERACTIVECORP
Entity Central Index Key	0000891103
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock
Entity Common Stock, Shares Outstanding		77,196,951
Class B Convertible Common Stock
Entity Common Stock, Shares Outstanding		5,789,499

CONSOLIDATED BALANCE SHEET (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 766,448	$ 990,405
Marketable securities	53,937	160,648
Accounts receivable, net of allowance of $16,202 and $12,437, respectively	246,978	236,086
Other current assets	178,883	166,742
Total current assets	1,246,246	1,553,881
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	299,078	302,459
Goodwill	1,769,141	1,754,926
Intangible assets, net of accumulated amortization of $122,653 and $98,937 respectively	459,921	491,936
Long-term investments	138,825	114,983
Other non-current assets	114,107	56,693
TOTAL ASSETS	4,027,318	4,274,878
LIABILITIES:
Accounts payable, trade	68,448	81,163
Deferred revenue	237,947	194,988
Accrued expenses and other current liabilities	347,062	397,803
Total current liabilities	653,457	673,954
Long-term debt	1,000,000	1,080,000
Income taxes payable	23,641	32,635
Deferred income taxes	417,326	409,529
Other long-term liabilities	62,476	45,191
Redeemable noncontrolling interests	25,227	40,427
Commitments and contingencies
SHAREHOLDERS' EQUITY:
Additional paid-in capital	11,459,267	11,415,617
Retained earnings	391,492	325,118
Accumulated other comprehensive loss	(144,488)	(87,700)
Treasury stock 187,137,267 and 184,182,001 shares, respectively	(9,861,350)	(9,661,350)
Total IAC shareholders' equity	1,845,191	1,991,953
Noncontrolling interests	0	1,189
Total shareholders' equity	1,845,191	1,993,142
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,027,318	4,274,878
Common Stock
SHAREHOLDERS' EQUITY:
Common stock	254	252
Class B Convertible Common Stock
SHAREHOLDERS' EQUITY:
Common stock	$ 16	$ 16

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts receivable, allowance (in dollars)	$ 16,202	$ 12,437
Accumulated depreciation and amortization, property and equipment (in dollars)	305,226	279,534
Accumulated amortization (in dollars)	$ 122,653	$ 98,937
Treasury stock, shares	187,137,267	184,182,001
Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	1,600,000,000	1,600,000,000
Common stock, issued shares	253,957,313	252,170,058
Common stock, outstanding shares	77,188,046	78,356,057
Class B Convertible Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	400,000,000	400,000,000
Common stock, issued shares	16,157,499	16,157,499
Common stock, outstanding shares	5,789,499	5,789,499

CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue	$ 838,561	$ 782,231	$ 2,382,205	$ 2,278,793
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	205,261	224,695	580,090	644,659
Selling and marketing expense	337,226	278,321	1,014,289	849,410
General and administrative expense	134,122	106,987	378,265	311,973
Product development expense	46,859	40,691	138,546	118,352
Depreciation	15,625	14,133	46,693	44,208
Amortization of intangibles	12,338	16,451	39,304	41,836
Total operating costs and expenses	751,431	681,278	2,197,187	2,010,438
Operating income	87,130	100,953	185,018	268,355
Equity in earnings (losses) of unconsolidated affiliates	398	(612)	(78)	(9,397)
Interest expense	(15,992)	(14,009)	(45,270)	(42,119)
Other income (expense), net	34,000	4,113	39,826	(58,810)
Earnings from continuing operations before income taxes	105,536	90,445	179,496	158,029
Income tax (provision) benefit	(40,510)	59,816	(34,722)	8,542
Earnings from continuing operations	65,026	150,261	144,774	166,571
Earnings (loss) from discontinued operations, net of tax	17	175,730	(11)	174,048
Net earnings	65,043	325,991	144,763	340,619
Net loss attributable to noncontrolling interests	568	821	6,558	4,082
Net earnings (loss) attributable to IAC shareholders	$ 65,611	$ 326,812	$ 151,321	$ 344,701
Per share information attributable to IAC shareholders:
Basic earnings (loss) per share from continuing operations (in dollars per share)	$ 0.79	$ 1.81	$ 1.82	$ 2.05
Diluted earnings (loss) per share from continuing operations (in dollars per share)	0.74	1.70	1.71	1.93
Basic earnings (loss) per share (in dollars per share)	0.79	3.91	1.82	4.15
Diluted earnings (loss) per share (in dollars per share)	0.74	3.68	1.71	3.91
Dividends declared per share (in dollars per share)	$ 0.34	$ 0.34	$ 1.02	$ 0.82
Stock-based compensation expense by function:
Stock-based compensation expense	$ 27,009	$ 17,332	$ 71,869	$ 43,497
Cost of revenue
Stock-based compensation expense by function:
Stock-based compensation expense	307	453	846	904
Selling and marketing expense
Stock-based compensation expense by function:
Stock-based compensation expense	2,442	775	7,284	1,628
General and administrative expense
Stock-based compensation expense by function:
Stock-based compensation expense	21,683	14,094	56,320	35,753
Product development expense
Stock-based compensation expense by function:
Stock-based compensation expense	$ 2,577	$ 2,010	$ 7,419	$ 5,212

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 65,043	$ 325,991	$ 144,763	$ 340,619
Other comprehensive (loss) income, net of tax:
Change in foreign currency translation adjustment	(10,603)	(36,759)	(58,604)	(31,569)
Change in unrealized gains and losses of available-for-sale securities (net of tax benefits of $277 and $95 for the three and nine months ended September 30, 2015, respectively, and net of tax benefits of $245 and $1,683 for the three and nine months ended September 30, 2014, respectively)	(3,617)	(389)	632	(2,639)
Total other comprehensive loss, net of tax	(14,220)	(37,148)	(57,972)	(34,208)
Comprehensive income	50,823	288,843	86,791	306,411
Comprehensive loss attributable to noncontrolling interests	595	1,107	7,742	4,568
Comprehensive income attributable to IAC shareholders	$ 51,418	$ 289,950	$ 94,533	$ 310,979

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Tax benefit of change in unrealized gains and losses of available-for-sale securities	$ 277	$ 245	$ 95	$ 1,683

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	IAC	Common Stock Common Stock $.001 Par Value	Common Stock Class B Convertible Common Stock $.001 Par Value	Additional Paid-in Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests
Beginning balance at Dec. 31, 2014	$ 1,993,142	$ 1,991,953	$ 252	$ 16	$ 11,415,617	$ 325,118	$ (87,700)	$ (9,661,350)	$ 1,189
Beginning balance, common stock (in shares) at Dec. 31, 2014			252,170	16,157
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings for the nine months ended September 30, 2015	151,321	151,321				151,321
Other comprehensive loss, net of tax	(56,788)	(56,788)					(56,788)
Stock-based compensation expense	62,611	62,611			62,611
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	(39,510)	(39,510)	$ 2		(39,512)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (in shares)			1,787
Income tax benefit related to stock-based awards	37,298	37,298			37,298
Dividends	(84,947)	(84,947)				(84,947)
Purchase of treasury stock	(200,000)	(200,000)						(200,000)
Adjustment of redeemable noncontrolling interests to fair value	(15,903)	(15,903)			(15,903)
Transfer from noncontrolling interests to redeemable noncontrolling interests	(1,189)								(1,189)
Other	(844)	(844)			(844)
Ending balance at Sep. 30, 2015	1,845,191	$ 1,845,191	$ 254	$ 16	$ 11,459,267	$ 391,492	$ (144,488)	$ (9,861,350)	$ 0
Ending balance, common stock (in shares) at Sep. 30, 2015			253,957	16,157
Beginning balance at Dec. 31, 2014	40,427
Increase (Decrease) in Redeemable Noncontrolling Interests
Net (loss) earnings	(6,558)
Other comprehensive loss, net of tax	(1,184)
Stock-based compensation expense	5,066
Purchase of redeemable noncontrolling interests	(29,899)
Adjustment of redeemable noncontrolling interests to fair value	15,903
Transfer from noncontrolling interests to redeemable noncontrolling interests	1,189
Other	283
Ending balance at Sep. 30, 2015	$ 25,227

CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities attributable to continuing operations:
Net earnings	$ 144,763	$ 340,619
Earnings (loss) from discontinued operations, net of tax	(11)	174,048
Earnings from continuing operations	144,774	166,571
Adjustments to reconcile earnings from continuing operations to net cash provided by operating activities attributable to continuing operations:
Stock-based compensation expense	71,869	43,497
Depreciation	46,693	44,208
Amortization of intangibles	39,304	41,836
Impairment of long-term investments	1,304	64,281
Excess tax benefits from stock-based awards	(49,147)	(41,320)
Deferred income taxes	(7,851)	88,739
Equity in losses of unconsolidated affiliates	78	9,397
Acquisition-related contingent consideration fair value adjustments	(17,906)	(13,781)
Gain on real estate transaction	(33,586)	0
Other changes in assets and liabilities, net	13,852	10,080
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(25,822)	(12,779)
Other assets	(13,746)	(8,735)
Accounts payable and other current liabilities	(17,453)	(24,183)
Income taxes payable	(13,748)	(114,584)
Deferred revenue	45,674	41,667
Other changes in assets and liabilities, net	(182)	(233)
Net cash provided by operating activities attributable to continuing operations	184,107	294,661
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	(43,286)	(244,196)
Capital expenditures	(44,558)	(39,033)
Proceeds from maturities and sales of marketable debt securities	192,928	998
Purchases of marketable debt securities	(93,134)	(110,886)
Purchases of long-term investments	(25,073)	(17,703)
Other, net	4,456	11,924
Net cash used in investing activities attributable to continuing operations	(8,667)	(398,896)
Cash flows from financing activities attributable to continuing operations:
Purchase of treasury stock	(200,000)	0
Dividends	(84,947)	(68,505)
Principal payment on long-term debt	(80,000)	0
Issuance of common stock, net of withholding taxes	(40,197)	(4,823)
Excess tax benefits from stock-based awards	49,147	41,320
Purchase of noncontrolling interests	(29,899)	(30,328)
Funds returned from escrow for Meetic tender offer	0	12,354
Acquisition-related contingent consideration payments	(5,712)	(7,659)
Other, net	512	(1,397)
Net cash used in financing activities attributable to continuing operations	(391,096)	(59,038)
Total cash used in continuing operations	(215,656)	(163,273)
Total cash used in discontinued operations	(190)	(171)
Effect of exchange rate changes on cash and cash equivalents	(8,111)	(5,288)
Net decrease in cash and cash equivalents	(223,957)	(168,732)
Cash and cash equivalents at beginning of period	990,405	1,100,444
Cash and cash equivalents at end of period	$ 766,448	$ 931,712

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations IAC is a leading media and Internet company. The Company is organized into four segments: The Match Group, which consists of dating, education and fitness businesses with brands such as Match, OkCupid, Tinder, The Princeton Review and DailyBurn; Search & Applications, which includes brands such as About.com, Ask.com, Dictionary.com and Investopedia; Media, which consists of businesses such as Vimeo, Electus, The Daily Beast and CollegeHumor; and eCommerce, which includes HomeAdvisor and ShoeBuy. IAC's brands and products are among the most recognized in the world reaching users in over 200 countries. All references to "IAC," the "Company," "we," "our" or "us" in this report are to IAC/InterActiveCorp. Match Group, Inc. Initial Public Offering and Acquisition of PlentyOfFish On November 9, 2015, Match Group, Inc. filed a registration statement on Form S-1 with the Securities and Exchange Commission ("SEC") relating to the proposed initial public offering ("IPO") of less than 20% of its common stock. The IPO is expected to be completed during the fourth quarter of 2015. On October 28, 2015, Match Group, Inc. completed its previously announced purchase of Plentyoffish Media Inc., or PlentyOfFish, for $575 million in cash. Basis of Presentation The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP"). Basis of Consolidation and Accounting for Investments The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated. Investments in the common stock or in-substance common stock of entities in which the Company has the ability to exercise significant influence over the operating and financial matters of the investee, but does not have a controlling financial interest, are accounted for using the equity method and are included in "Long-term investments" in the accompanying consolidated balance sheet. The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the rules and regulations of the SEC. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited consolidated financial statements include all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation. Interim results are not necessarily indicative of the results that may be expected for the full year. The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. Accounting Estimates The preparation of consolidated financial statements in accordance with GAAP requires management to make certain estimates, judgments and assumptions that impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of contingent assets and liabilities. Actual results could differ from these estimates. On an ongoing basis, the Company evaluates its estimates and judgments including those related to: the fair values of marketable securities and other investments; the recoverability of goodwill and indefinite-lived intangible assets; the useful lives and recoverability of definite-lived intangible assets and property and equipment; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts and revenue reserves; the fair value of acquisition-related contingent consideration; the liabilities for uncertain tax positions; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that the Company considers relevant. Certain Risks and Concentrations A substantial portion of the Company's revenue is derived from online advertising, the market for which is highly competitive and rapidly changing. Significant changes in this industry or changes in advertising spending behavior or in customer buying behavior could adversely affect our operating results. Most of the Company's online advertising revenue is attributable to a services agreement with Google Inc. ("Google"). On October 26, 2015, the Company and Google entered into a services agreement that is effective as of April 1, 2016, following the expiration of the current services agreement, and expires on March 31, 2020. The Company may choose to terminate the agreement effective March 31, 2019. These services agreements require that we comply with certain guidelines promulgated by Google. Subject to certain limitations, Google may unilaterally update its policies and guidelines, which could require modifications to, or prohibit and/or render obsolete certain of our products, services and/or business practices, which could be costly to address or otherwise have an adverse effect on our business, financial condition and results of operations. For the three and nine months ended September 30, 2015, revenue earned from Google is $332.0 million and $979.8 million, respectively. For the three and nine months ended September 30, 2014, revenue earned from Google is $351.4 million and $1.1 billion, respectively. This revenue is earned by the businesses comprising the Search & Applications segment. Accounts receivable related to revenue earned from Google totaled $112.2 million and $118.7 million at September 30, 2015 and December 31, 2014, respectively. Recent Accounting Pronouncement In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, which clarifies the principles for recognizing revenue and develops a common standard for all industries. In July 2015, the FASB decided to defer the effective date for annual reporting periods beginning after December 15, 2017. Early adoption is permitted beginning on the original effective date of December 15, 2016. Upon adoption, ASU No. 2014-09 may either be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the new guidance and has not yet determined whether the adoption of the new standard will have a material impact on its consolidated financial statements or the method and timing of adoption. Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.

INCOME TAXES	9 Months Ended
INCOME TAXES	Sep. 30, 2015
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES At the end of each interim period, the Company makes its best estimate of the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to significant, unusual, or extraordinary items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which they occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or the liabilities for uncertain tax positions is recognized in the interim period in which the change occurs. The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in foreign jurisdictions, permanent and temporary differences, and the likelihood of the realization of deferred tax assets generated in the current year. The accounting estimates used to compute the provision or benefit for income taxes may change as new events occur, more experience is acquired, additional information is obtained or our tax environment changes. To the extent that the expected annual effective income tax rate changes during a quarter, the effect of the change on prior quarters is included in income tax provision in the quarter in which the change occurs. For the three and nine months ended September 30, 2015, the Company recorded an income tax provision for continuing operations of $40.5 million and $34.7 million, respectively, which represents effective income tax rates of 38% and 19%, respectively. The effective tax rate for the three months ended September 30, 2015 is higher than the statutory rate of 35% due primarily to state taxes, partially offset by foreign income taxed at lower rates. The effective tax rate for the nine months ended September 30, 2015 is lower than the statutory rate of 35% due primarily to the realization of certain deferred tax assets, a reduction in tax reserves and related interest due to the expiration of statutes of limitations and the non-taxable gain on contingent consideration fair value adjustments in the current year period. For the three and nine months ended September 30, 2014, the Company recorded an income tax benefit for continuing operations of $59.8 million and $8.5 million, respectively, despite pre-tax income of $90.4 million and $158.0 million, respectively. The income tax benefit for the three and nine months ended September 30, 2014 is due principally to a reduction in tax reserves and related interest due to the expiration of statutes of limitations for federal income taxes for 2001 through 2009 of $88.2 million. The Company recognizes interest and, if applicable, penalties related to unrecognized tax benefits in the income tax provision. Included in the income tax provision for continuing operations for the three and nine months ended September 30, 2015, is a less than $0.1 million expense and a $0.2 million benefit, respectively, net of related deferred taxes, for interest on unrecognized tax benefits. At September 30, 2015 and December 31, 2014, the Company has accrued $2.2 million and $2.8 million, respectively, for the payment of interest. At September 30, 2015 and December 31, 2014, the Company has accrued $2.1 million and $2.9 million, respectively, for penalties. The Company is routinely under audit by federal, state, local and foreign authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. The Internal Revenue Service is currently auditing the Company’s federal income tax returns for the years ended December 31, 2010 through 2012. Various other jurisdictions are open to examination for various tax years beginning with 2009. Income taxes payable include reserves considered sufficient to pay assessments that may result from examination of prior year tax returns. Changes to reserves from period to period and differences between amounts paid, if any, upon resolution of audits and amounts previously provided may be material. Differences between the reserves for uncertain tax positions and the amounts owed by the Company are recorded in the period they become known. At September 30, 2015 and December 31, 2014, unrecognized tax benefits, including interest and penalties, are $24.8 million and $33.2 million, respectively. If unrecognized tax benefits at September 30, 2015 are subsequently recognized, $22.8 million, net of related deferred tax assets and interest, would reduce income tax provision for continuing operations. The Company believes that it is reasonably possible that its unrecognized tax benefits could decrease by $7.7 million within twelve months of September 30, 2015 primarily due to expiration of statutes of limitations and settlements.

MARKETABLE SECURITIES

9 Months Ended

Sep. 30, 2015

Marketable Securities [Abstract]

MARKETABLE SECURITIES

At September 30, 2015, current available-for-sale marketable securities are as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Corporate debt securities	$	53,600	$	7	$	(129	)	$	53,478
Equity security	98		361		—			459
Total marketable securities	$	53,698	$	368	$	(129	)	$	53,937

At December 31, 2014, current available-for-sale marketable securities are as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Corporate debt securities	$	159,418	$	34	$	(255	)	$	159,197
Equity security	98		1,353		—			1,451
Total marketable securities	$	159,516	$	1,387	$	(255	)	$	160,648

The unrealized gains and losses in the tables above are included in "Accumulated other comprehensive loss" in the accompanying consolidated balance sheet. The gross unrealized losses on the marketable debt securities relate primarily to changes in interest rates. The Company does not consider the gross unrealized losses to be other-than-temporary because the Company does not intend to sell the marketable debt securities that generated the gross unrealized losses at September 30, 2015, and it is not more likely than not that the Company will be required to sell these securities before recovery of their amortized costs bases, which may be maturity.

The contractual maturities of debt securities classified as current available-for-sale at September 30, 2015 are as follows:



	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	4,374	$	4,370
Due after one year through five years	49,226		49,108
Total	$	53,600	$	53,478

The following table presents the proceeds from maturities and sales of current and non-current available-for-sale marketable securities and the related gross realized gains:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
	(In thousands)
Proceeds from maturities and sales of available-for-sale marketable securities	$	178,315	$	1,114	$	192,928	$	4,576
Gross realized gains	17		1,063		22		3,362

There were no gross realized losses from the maturities and sales of available-for-sale marketable securities for the three and nine months ended September 30, 2015 and 2014. However, during the second quarter of 2015, the Company recognized $0.3 million in losses that were deemed to be other-than-temporary related to various corporate debt securities that were expected to be sold by the Company, in part, to fund its cash needs related to Match Group, Inc.'s acquisition of PlentyOfFish for $575 million.

Gross realized gains from the maturities and sales of available-for-sale marketable securities and gross unrealized losses that were deemed to be other-than-temporary are included in "Other income (expense), net" in the accompanying consolidated statement of operations.

The specific-identification method is used to determine the cost of securities sold and the amount of unrealized gains and losses reclassified out of accumulated other comprehensive income into earnings.

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements and Financial Instruments

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS

The Company categorizes its financial instruments measured at fair value into a fair value hierarchy that prioritizes the inputs used in pricing the asset or liability. The three levels of the fair value hierarchy are:


•	Level 1: Observable inputs obtained from independent sources, such as quoted prices for identical assets and liabilities in active markets.

•

Level 2: Other inputs, which are observable directly or indirectly, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and inputs that are derived principally from or corroborated by observable market data. The fair values of the Company's Level 2 financial assets are primarily obtained from observable market prices for identical underlying securities that may not be actively traded. Certain of these securities may have different market prices from multiple market data sources, in which case an average market price is used.


•	Level 3: Unobservable inputs for which there is little or no market data and require the Company to develop its own assumptions, based on the best information available in the circumstances, about the assumptions market participants would use in pricing the assets or liabilities. See below for a discussion of fair value measurements made using Level 3 inputs.

The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:



	September 30, 2015
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	375,094	$	—	$	—		$	375,094
Time deposits	—		45,005		—			45,005
Commercial paper	—		8,999		—			8,999
Marketable securities:
Corporate debt securities	—		53,478		—			53,478
Equity security	459		—		—			459
Long-term investments:
Auction rate security	—		—		5,010			5,010
Marketable equity security	9,594		—		—			9,594
Total	$	385,147	$	107,482	$	5,010		$	497,639

Liabilities:
Contingent consideration arrangements	$	—	$	—	$	(31,470	)	$	(31,470	)



	December 31, 2014
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	174,720	$	—	$	—		$	174,720
Time deposits	—		42,914		—			42,914
Commercial paper	—		388,801		—			388,801
Marketable securities:
Corporate debt securities	—		159,197		—			159,197
Equity security	1,451		—		—			1,451
Long-term investments:
Auction rate security	—		—		6,070			6,070
Marketable equity security	7,410		—		—			7,410
Total	$	183,581	$	590,912	$	6,070		$	780,563

Liabilities:
Contingent consideration arrangements	$	—	$	—	$	(30,140	)	$	(30,140	)

The following tables present the changes in the Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):



	Three Months Ended September 30,
	2015						2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at July 1	$	6,630		$	(31,858	)	$	9,250		$	(41,397	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			960			—			14,281
Included in other comprehensive (loss) income	(1,620		)	(579		)	(670		)	1,918
Settlements	—			7			—			29
Balance at September 30	$	5,010		$	(31,470	)	$	8,580		$	(25,169	)



	Nine Months Ended September 30,
	2015						2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at January 1	$	6,070		$	(30,140	)	$	8,920		$	(45,828	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			17,906			—			13,781
Foreign currency exchange gains	—			626			—			—
Included in other comprehensive (loss) income	(1,060		)	1,538			(340		)	2,054
Fair value at date of acquisition	—			(27,112		)	—			(2,835		)
Settlements	—			5,712			—			7,659
Balance at September 30	$	5,010		$	(31,470	)	$	8,580		$	(25,169	)

Auction rate security

The Company's auction rate security is valued by discounting the estimated future cash flow streams of the security over the life of the security. Credit spreads and other risk factors are also considered in establishing fair value. The cost basis of the auction rate security is $10.0 million, with gross unrealized losses of $5.0 million and $3.9 million at September 30, 2015 and December 31, 2014, respectively. The unrealized losses are included in "Accumulated other comprehensive loss" in the accompanying consolidated balance sheet. At September 30, 2015, the auction rate security is rated BBB- and matures in 2035. The Company does not consider the auction rate security to be other-than-temporarily impaired at September 30, 2015, due to its credit rating and because the Company does not intend to sell this security, and it is not more likely than not that the Company will be required to sell this security, before the recovery of its amortized cost basis, which may be maturity.

Contingent Consideration Arrangements

As of September 30, 2015, there are nine contingent consideration arrangements related to business acquisitions. Eight of the contingent consideration arrangements have limits as to the maximum amount that can be paid; the maximum contingent payments related to these arrangements is $242.8 million and the fair value of these arrangements at September 30, 2015 is $31.0 million. The fair value of the one contingent consideration arrangement without a limit on the maximum amount is $0.5 million at September 30, 2015. The contingent consideration arrangements are generally based upon earnings performance and/or operating metrics such as monthly active users. The Company determines the fair value of the contingent consideration arrangements by using a probability-weighted analysis to determine the amount of the gross liability, and, if the arrangement is long-term in nature, applying a discount rate that captures the risks associated with the obligation. The number of scenarios in the probability-weighted analyses can vary; generally, more scenarios are prepared for longer duration and more complex arrangements. The fair values of the contingent consideration arrangements at September 30, 2015 reflect discount rates ranging from 12-25%.

The fair values of the contingent consideration arrangements are sensitive to changes in the forecasts of earnings and/or the relevant operating metrics and changes in discount rates. The Company remeasures the fair value of the contingent consideration arrangements each reporting period, and changes are recognized in “General and administrative expense” in the accompanying consolidated statement of operations. The contingent consideration arrangement liability at September 30, 2015 includes a current portion of $0.7 million and non-current portion of $30.8 million, which are included in “Accrued expenses and other current liabilities” and “Other long-term liabilities,” respectively, in the accompanying consolidated balance sheet.

Assets measured at fair value on a nonrecurring basis

The Company's non-financial assets, such as goodwill, intangible assets and property and equipment, as well as equity and cost method investments, are adjusted to fair value only when an impairment charge is recognized. Such fair value measurements are based predominantly on Level 3 inputs.

Cost method investments

At September 30, 2015 and December 31, 2014, the carrying values of the Company's investments accounted for under the cost method totaled $113.7 million and $90.9 million, respectively, and are included in "Long-term investments" in the accompanying consolidated balance sheet. The Company evaluates each cost method investment for impairment on a quarterly basis and recognizes an impairment loss if a decline in value is determined to be other-than-temporary. If the Company has not identified events or changes in circumstances that may have a significant adverse effect on the fair value of a cost method investment, then the fair value of such cost method investment is not estimated, as it is impracticable to do so.

In the second quarter of 2014, the Company recorded $64.2 million of other-than-temporary impairment charges for certain cost method investments as a result of our assessment of the near-term prospects and financial condition of the investees. This charge is included in "Other income (expense), net" in the accompanying consolidated statement of operations.

Equity method investments

In the second quarter of 2014, the Company recorded a $4.2 million other-than-temporary impairment charge on an equity method investment following the sale of a majority of the investee's assets. This charge is included in "Equity in earnings (losses) of unconsolidated affiliates" in the accompanying consolidated statement of operations.

Long-term marketable equity security

The cost basis of the Company's long-term marketable equity security at September 30, 2015 and December 31, 2014 is $8.7 million, with a gross unrealized gain of $0.9 million and a gross unrealized loss of $1.2 million at September 30, 2015 and December 31, 2014, respectively. The gross unrealized gain at September 30, 2015 and gross unrealized loss at December 31, 2014 are included in "Accumulated other comprehensive loss" in the accompanying consolidated balance sheet.

Financial instruments measured at fair value only for disclosure purposes

The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:



	September 30, 2015						December 31, 2014
	Carrying Value			Fair Value			Carrying Value			Fair Value
	(In thousands)
Long-term debt	$	(1,000,000	)	$	(990,050	)	$	(1,080,000	)	$	(1,099,813	)

The fair value of long-term debt is estimated using market prices or indices for similar liabilities and takes into consideration other factors such as credit quality and maturity, which are Level 3 inputs.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

LONG-TERM DEBT

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

LONG-TERM DEBT

Long-term debt consists of:



	September 30, 2015		December 31, 2014
	(In thousands)
4.875% Senior Notes due November 30, 2018 (the "2013 Senior Notes"); interest payable each May 30 and November 30, which commenced May 30, 2014	$	500,000	$	500,000
4.75% Senior Notes due December 15, 2022 (the "2012 Senior Notes"); interest payable each June 15 and December 15, which commenced June 15, 2013	500,000		500,000
5% New York City Industrial Development Agency Liberty Bonds due September 1, 2035 (the "Liberty Bonds"); interest payable each March 1 and September 1, which commenced March 1, 2006	—		80,000
Total long-term debt	$	1,000,000	$	1,080,000

The 2013 and 2012 Senior Notes were issued on November 15, 2013 and December 21, 2012, respectively. On December 21, 2012, IAC entered into a $300 million revolving credit facility (the "IAC credit facility"). On October 7, 2015, the IAC credit facility agreement was amended and restated, and now expires October 7, 2020. At September 30, 2015 and December 31, 2014, there are no outstanding borrowings under the IAC credit facility. The annual fee to maintain the IAC credit facility is 35 basis points. Also, on October 7, 2015, Match Group, Inc. entered into a $500 million revolving credit facility, which expires on October 7, 2020 (the "Match credit facility"). The annual fee to maintain the Match credit facility is 35 basis points.

On October 16, 2015, Match Group, Inc. commenced a private exchange offer to eligible holders to exchange any and all of the 2012 Senior Notes for up to $500 million aggregate principal amount of new 6.75% Senior Notes due 2022 (the "Match Notes") to be issued by Match Group, Inc. ("Match Exchange Offer"). The Company expects to exchange $443.5 million of the 2012 Senior Notes for $443.5 million of the Match Notes pursuant to the Match Exchange Offer. Based on the results of the Match Exchange Offer, IAC does not expect to accept any 2013 Senior Notes for payment in the cash tender offer, which commenced on October 16, 2015.

The 2013 and 2012 Senior Notes are unconditionally guaranteed by certain IAC domestic subsidiaries, which are designated as guarantor subsidiaries. The guarantor subsidiaries are the same for the 2013 and 2012 Senior Notes and the IAC credit facility; any borrowings under the IAC credit facility would also be secured by the stock of certain of our domestic and foreign subsidiaries. See Note 11 for guarantor and non-guarantor financial information. The Match credit facility is guaranteed by the same entities that guarantee the 2013 and 2012 Senior Notes and the IAC credit facility, and also secured by the stock of certain Match Group, Inc. domestic and foreign subsidiaries. The Company expects that, promptly following the closing of the Match Exchange Offer, Match Group, Inc. will be designated an unrestricted subsidiary of IAC for purposes of the indentures governing the 2013 and 2012 Senior Notes and the IAC credit facility. Upon such designation, neither Match Group, Inc. nor any of its subsidiaries will guarantee any debt of the Company.

The indentures governing the 2013 and 2012 Senior Notes restrict our ability to incur additional indebtedness in the event we are not in compliance with the maximum leverage ratio of 3.0 to 1.0. In addition, the terms of the IAC credit facility require that we maintain a leverage ratio of not more than 3.25 to 1.0 and restrict our ability to incur additional indebtedness. The Company was in compliance with all applicable covenants at September 30, 2015. The terms of the Match credit facility require Match Group, Inc. to maintain a leverage ratio of not more than 5.0 to 1.0 and a minimum interest coverage ratio of not less than 2.5 to 1.0, and restrict Match Group, Inc.'s ability to incur additional indebtedness.

ACCUMULATED OTHER COMPREHENSIVE LOSS

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS

The following tables present the components of accumulated other comprehensive (loss) income.



	Three Months Ended September 30, 2015
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities				Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of July 1	$	(133,895	)	$	3,600			$	(130,295	)
Other comprehensive loss, net of tax benefit of $0.1 million related to unrealized losses on available-for-sale securities	(8,420		)	(3,501		)		(11,921		)
Amounts reclassified to earnings	(2,191		)	(81		)	^(a)	(2,272		)
Net current period other comprehensive loss	(10,611		)	(3,582		)		(14,193		)
Balance as of September 30	$	(144,506	)	$	18			$	(144,488	)

_________________________________________

^(a) Amount is net of a tax provision of $0.1 million.



	Three Months Ended September 30, 2014
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of July 1	$	(15,282	)	$	5,376		$	(9,906	)
Other comprehensive (loss) income before reclassifications, net of tax provision of $0.2 million related to unrealized losses on available-for-sale securities	(36,428		)	231			(36,197		)
Amounts reclassified to earnings related to unrealized gains on available-for-sale securities, net of tax provision of $0.4 million	—			(665		)	(665		)
Net current period other comprehensive loss	(36,428		)	(434		)	(36,862		)
Balance as of September 30	$	(51,710	)	$	4,942		$	(46,768	)



	Nine Months Ended September 30, 2015
	Foreign Currency Translation Adjustment			Unrealized (Losses) Gains On Available-For-Sale Securities				Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of January 1	$	(86,848	)	$	(852	)		$	(87,700	)
Other comprehensive (loss) income, net of tax benefit of $0.3 million related to unrealized losses on available-for-sale securities	(55,467		)	788				(54,679		)
Amounts reclassified to earnings	(2,191		)	82			^(b)	(2,109		)
Net current period other comprehensive (loss) income	(57,658		)	870				(56,788		)
Balance as of September 30	$	(144,506	)	$	18			$	(144,488	)

_________________________________________

^(b) Amount is net of a tax benefit of $0.1 million.



	Nine Months Ended September 30, 2014
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of January 1	$	(20,352	)	$	7,306		$	(13,046	)
Other comprehensive loss before reclassifications, net of tax benefit of $0.5 million related to unrealized losses on available-for-sale securities	(31,358		)	(439		)	(31,797		)
Amounts reclassified to earnings related to unrealized gains on available-for-sale securities, net of tax provision of $1.2 million	—			(1,925		)	(1,925		)
Net current period other comprehensive loss	(31,358		)	(2,364		)	(33,722		)
Balance as of September 30	$	(51,710	)	$	4,942		$	(46,768	)

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669619-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e716-108580

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e709-108580

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reclassification Adjustments
-URI http://asc.fasb.org/extlink&oid=6522872

+ Details

EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

EARNINGS PER SHARE

The following tables set forth the computation of basic and diluted earnings per share attributable to IAC shareholders.



	Three Months Ended September 30,
	2015				2014
	Basic		Diluted		Basic		Diluted
	(In thousands, except per share data)
Numerator:
Earnings from continuing operations	$	65,026	$	65,026	$	150,261	$	150,261
Net loss attributable to noncontrolling interests	568		568		821		821
Earnings from continuing operations attributable to IAC shareholders	65,594		65,594		151,082		151,082
Earnings from discontinued operations attributable to IAC shareholders	17		17		175,730		175,730
Net earnings attributable to IAC shareholders	$	65,611	$	65,611	$	326,812	$	326,812

Denominator:
Weighted average basic shares outstanding	82,910		82,910		83,591		83,591
Dilutive securities including stock options and RSUs^(a)(b)	—		5,990		—		5,199
Denominator for earnings per share—weighted average shares^(a)(b)	82,910		88,900		83,591		88,790

Earnings per share attributable to IAC shareholders:
Earnings per share from continuing operations	$	0.79	$	0.74	$	1.81	$	1.70
Discontinued operations	—		—		2.10		1.98
Earnings per share	$	0.79	$	0.74	$	3.91	$	3.68



	Nine Months Ended September 30,
	2015						2014
	Basic			Diluted			Basic		Diluted
	(In thousands, except per share data)
Numerator:
Earnings from continuing operations	$	144,774		$	144,774		$	166,571	$	166,571
Net loss attributable to noncontrolling interests	6,558			6,558			4,082		4,082
Earnings from continuing operations attributable to IAC shareholders	151,332			151,332			170,653		170,653
(Loss) earnings from discontinued operations attributable to IAC shareholders	(11		)	(11		)	174,048		174,048
Net earnings attributable to IAC shareholders	$	151,321		$	151,321		$	344,701	$	344,701

Denominator:
Weighted average basic shares outstanding	82,924			82,924			83,088		83,088
Dilutive securities including stock options and RSUs^(a)(b)	—			5,323			—		5,167
Denominator for earnings per share—weighted average shares^(a)(b)	82,924			88,247			83,088		88,255

Earnings per share attributable to IAC shareholders:
Earnings per share from continuing operations	$	1.82		$	1.71		$	2.05	$	1.93
Discontinued operations	—			—			2.10		1.98
Earnings per share	$	1.82		$	1.71		$	4.15	$	3.91

_________________________________________

^(a) If the effect is dilutive, weighted average common shares outstanding include the incremental shares that would be issued upon the assumed exercise of stock options and vesting of restricted stock units ("RSUs"). For the three and nine months ended September 30, 2015, 1.0 million and 1.3 million potentially dilutive securities, respectively, are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. For both the three and nine months ended September 30, 2014, 0.3 million shares related to potentially dilutive securities are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.

^(b) Performance-based stock units ("PSUs") are included in the denominator for earnings per share if (i) the applicable performance condition(s) has been met and (ii) the inclusion of the PSUs is dilutive for the respective reporting periods. For both the three and nine months ended September 30, 2015, 0.2 million PSUs that were probable of vesting were excluded from the calculation of diluted earnings per share because the performance conditions had not been met. For both the three and nine months ended September 30, 2014, less than 0.1 million PSUs related to potentially dilutive securities are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.

SEGMENT INFORMATION

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

SEGMENT INFORMATION

The overall concept that IAC employs in determining its operating segments is to present the financial information in a manner consistent with how the chief operating decision maker views the businesses, how the businesses are organized as to segment management, and the focus of the businesses with regards to the types of services or products offered or the target market. Operating segments are combined for reporting purposes if they meet certain aggregation criteria, which principally relate to the similarity of their economic characteristics or, in the case of the eCommerce reportable segment, do not meet the quantitative thresholds that require presentation as separate operating segments.



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Revenue:
Search & Applications	$	377,142		$	394,659		$	1,111,406		$	1,188,410
The Match Group	274,231			230,198			768,132			655,699
Media	57,278			49,895			137,100			122,906
eCommerce	130,031			107,825			366,027			312,616
Inter-segment eliminations	(121		)	(346		)	(460		)	(838		)
Total	$	838,561		$	782,231		$	2,382,205		$	2,278,793



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Operating Income (Loss):
Search & Applications	$	65,391		$	80,384		$	198,283		$	228,492
The Match Group	71,912			66,393			148,665			167,394
Media	(8,252		)	(8,723		)	(37,379		)	(27,083		)
eCommerce	4,243			(1,585		)	(3,615		)	(3,138		)
Corporate	(46,164		)	(35,516		)	(120,936		)	(97,310		)
Total	$	87,130		$	100,953		$	185,018		$	268,355



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Adjusted EBITDA:
Search & Applications	$	74,391		$	93,127		$	226,202		$	266,456
The Match Group	84,339			61,371			175,017			178,169
Media	(7,746		)	(7,702		)	(37,781		)	(24,477		)
eCommerce	7,713			3,865			7,257			11,192
Corporate	(17,555		)	(16,073		)	(45,717		)	(47,225		)
Total	$	141,142		$	134,588		$	324,978		$	384,115

Revenue by geography is based on where the customer is located. Geographic information about revenue and long-lived assets is presented below:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
	(In thousands)
Revenue:
United States	$	619,297	$	544,486	$	1,755,534	$	1,560,751
All other countries	219,264		237,745		626,671		718,042
Total	$	838,561	$	782,231	$	2,382,205	$	2,278,793



	September 30, 2015		December 31, 2014
	(In thousands)
Long-lived assets (excluding goodwill and intangible assets):
United States	$	278,970	$	281,879
All other countries	20,108		20,580
Total	$	299,078	$	302,459

The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets and (ii) gains and losses recognized on changes in the fair value of contingent consideration arrangements. The Company believes this measure is useful for analysts and investors as this measure allows a more meaningful comparison between our performance and that of our competitors. Moreover, our management uses this measure internally to evaluate the performance of our business as a whole and our individual business segments. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature, and we believe that by excluding these items, Adjusted EBITDA corresponds more closely to the cash operating income generated from our business, from which capital investments are made and debt is serviced. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses.

The following tables reconcile Adjusted EBITDA to operating income (loss) for the Company's reportable segments:



	Three Months Ended September 30, 2015
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments			Operating Income (Loss)
	(In thousands)
Search & Applications	$	74,391		$	—		$	(3,777	)	$	(6,736	)	$	1,513		$	65,391
The Match Group	84,339			(1,147		)	(6,173		)	(4,352		)	(755		)	71,912
Media	(7,746		)	(50		)	(280		)	(378		)	202			(8,252		)
eCommerce	7,713			(410		)	(2,188		)	(872		)	—			4,243
Corporate	(17,555		)	(25,402		)	(3,207		)	—			—			(46,164		)
Total	$	141,142		$	(27,009	)	$	(15,625	)	$	(12,338	)	$	960		$	87,130



	Three Months Ended September 30, 2014
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments		Operating Income (Loss)
	(In thousands)
Search & Applications	$	93,127		$	—		$	(3,596	)	$	(9,147	)	$	—	$	80,384
The Match Group	61,371			(145		)	(5,794		)	(3,320		)	14,281		66,393
Media	(7,702		)	(161		)	(225		)	(635		)	—		(8,723		)
eCommerce	3,865			(138		)	(1,963		)	(3,349		)	—		(1,585		)
Corporate	(16,073		)	(16,888		)	(2,555		)	—			—		(35,516		)
Total	$	134,588		$	(17,332	)	$	(14,133	)	$	(16,451	)	$	14,281	$	100,953



	Nine Months Ended September 30, 2015
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments		Operating Income (Loss)
	(In thousands)
Search & Applications	$	226,202		$	—		$	(11,078	)	$	(20,631	)	$	3,790	$	198,283
The Match Group	175,017			(3,816		)	(19,885		)	(14,130		)	11,479		148,665
Media	(37,781		)	(344		)	(712		)	(1,179		)	2,637		(37,379		)
eCommerce	7,257			(1,250		)	(6,258		)	(3,364		)	—		(3,615		)
Corporate	(45,717		)	(66,459		)	(8,760		)	—			—		(120,936		)
Total	$	324,978		$	(71,869	)	$	(46,693	)	$	(39,304	)	$	17,906	$	185,018



	Nine Months Ended September 30, 2014
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments		Operating Income (Loss)
	(In thousands)
Search & Applications	$	266,456		$	—		$	(13,143	)	$	(24,821	)	$	—	$	228,492
The Match Group	178,169			(332		)	(17,183		)	(6,841		)	13,581		167,394
Media	(24,477		)	(486		)	(731		)	(1,589		)	200		(27,083		)
eCommerce	11,192			(138		)	(5,607		)	(8,585		)	—		(3,138		)
Corporate	(47,225		)	(42,541		)	(7,544		)	—			—		(97,310		)
Total	$	384,115		$	(43,497	)	$	(44,208	)	$	(41,836	)	$	13,781	$	268,355

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

CONSOLIDATED FINANCIAL STATEMENT DETAILS

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidated Financial Statement Details

CONSOLIDATED FINANCIAL STATEMENT DETAILS

Other income (expense), net consists of:



	Three Months Ended September 30,					Nine Months Ended September 30,
	2015			2014		2015			2014
	(In thousands)
Gain on real estate transaction	$	33,586		$	—	$	33,586		$	—
Impairment of long-term investments	(804		)	—		(1,304		)	(64,281		)
Foreign currency exchange gains (losses)	308			2,210		4,838			(612		)
Other	910			1,903		2,706			6,083
Total	$	34,000		$	4,113	$	39,826		$	(58,810	)

CONTINGENCIES	9 Months Ended
CONTINGENCIES	Sep. 30, 2015
Loss Contingency [Abstract]
CONTINGENCIES	CONTINGENCIES In the ordinary course of business, the Company is a party to various lawsuits. The Company establishes reserves for specific legal matters when it determines that the likelihood of an unfavorable outcome is probable and the loss is reasonably estimable. Management has also identified certain other legal matters where we believe an unfavorable outcome is not probable and, therefore, no reserve is established. Although management currently believes that resolving claims against us, including claims where an unfavorable outcome is reasonably possible, will not have a material impact on the liquidity, results of operations, or financial condition of the Company, these matters are subject to inherent uncertainties and management's view of these matters may change in the future. The Company also evaluates other contingent matters, including income and non-income tax contingencies, to assess the likelihood of an unfavorable outcome and estimated extent of potential loss. It is possible that an unfavorable outcome of one or more of these lawsuits or other contingencies could have a material impact on the liquidity, results of operations, or financial condition of the Company. See Note 2 for additional information related to income tax contingencies.

- Definition

The entire disclosure for loss and gain contingencies. Describes any existing condition, situation, or set of circumstances involving uncertainty as of the balance sheet date (or prior to issuance of the financial statements) as to a probable or reasonably possible loss incurred by an entity that will ultimately be resolved when one or more future events occur or fail to occur, and typically discloses the amount of loss recorded or a range of possible loss, or an assertion that no reasonable estimate can be made.

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+ Details

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION

9 Months Ended

Sep. 30, 2015

Guarantor and Nonguarantor Financial Statements [Abstract]

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION

The 2013 and 2012 Senior Notes are unconditionally guaranteed, jointly and severally, by certain domestic subsidiaries that are 100% owned by the Company. The following tables present condensed consolidating financial information at September 30, 2015 and December 31, 2014 and for the three and nine months ended September 30, 2015 and 2014 for: IAC, on a stand-alone basis; the combined guarantor subsidiaries of IAC; the combined non-guarantor subsidiaries of IAC; and IAC on a consolidated basis.

Balance sheet at September 30, 2015:



	IAC		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Total Eliminations			IAC Consolidated
	(In thousands)
Cash and cash equivalents	$	360,009	$	—	$	406,439	$	—		$	766,448
Marketable securities	53,477		—		460		—			53,937
Accounts receivable, net	9		147,175		99,794		—			246,978
Other current assets	7,261		93,121		82,236		(3,735		)	178,883
Intercompany receivables	—		1,557,881		779,941		(2,337,822		)	—
Property and equipment, net	4,574		228,159		66,345		—			299,078
Goodwill	—		1,247,038		522,103		—			1,769,141
Intangible assets, net	—		307,079		152,842		—			459,921
Investment in subsidiaries	5,033,588		957,866		—		(5,991,454		)	—
Other non-current assets	92,132		28,897		139,963		(8,060		)	252,932
Total assets	$	5,551,050	$	4,567,216	$	2,250,123	$	(8,341,071	)	$	4,027,318

Accounts payable, trade	$	2,865	$	34,991	$	30,592	$	—		$	68,448
Other current liabilities	54,163		326,379		204,453		14			585,009
Long-term debt	1,000,000		—		—		—			1,000,000
Income taxes payable	858		4,531		18,252		—			23,641
Intercompany liabilities	2,337,822		—		—		(2,337,822		)	—
Other long-term liabilities	310,151		105,074		76,386		(11,809		)	479,802
Redeemable noncontrolling interests	—		—		25,227		—			25,227
IAC shareholders' equity	1,845,191		4,096,241		1,895,213		(5,991,454		)	1,845,191
Total liabilities and shareholders' equity	$	5,551,050	$	4,567,216	$	2,250,123	$	(8,341,071	)	$	4,027,318

Balance sheet at December 31, 2014:



	IAC		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Total Eliminations			IAC Consolidated
	(In thousands)
Cash and cash equivalents	$	766,076	$	1,021	$	223,308	$	—		$	990,405
Marketable securities	159,197		—		1,451		—			160,648
Accounts receivable, net	13		155,262		80,811		—			236,086
Other current assets	23,923		91,105		57,487		(5,773		)	166,742
Intercompany receivables	—		1,688,403		970,810		(2,659,213		)	—
Property and equipment, net	4,950		232,819		64,690		—			302,459
Goodwill	—		1,249,807		505,119		—			1,754,926
Intangible assets, net	—		325,771		166,165		—			491,936
Investment in subsidiaries	5,035,304		930,443		—		(5,965,747		)	—
Other non-current assets	44,610		20,682		109,372		(2,988		)	171,676
Total assets	$	6,034,073	$	4,695,313	$	2,179,213	$	(8,633,721	)	$	4,274,878

Accounts payable, trade	$	3,059	$	55,320	$	22,784	$	—		$	81,163
Other current liabilities	73,491		328,920		191,197		(817		)	592,791
Long-term debt	1,000,000		80,000		—		—			1,080,000
Income taxes payable	2,240		4,771		25,624		—			32,635
Intercompany liabilities	2,659,213		—		—		(2,659,213		)	—
Other long-term liabilities	304,117		104,219		54,328		(7,944		)	454,720
Redeemable noncontrolling interests	—		—		40,427		—			40,427
IAC shareholders' equity	1,991,953		4,122,083		1,843,664		(5,965,747		)	1,991,953
Noncontrolling interests	—		—		1,189		—			1,189
Total liabilities and shareholders' equity	$	6,034,073	$	4,695,313	$	2,179,213	$	(8,633,721	)	$	4,274,878

Statement of operations for the three months ended September 30, 2015:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	606,269		$	235,352		$	(3,060	)	$	838,561
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	307			117,292			87,922			(260		)	205,261
Selling and marketing expense	1,250			276,036			62,741			(2,801		)	337,226
General and administrative expense	37,186			70,225			26,710			1			134,122
Product development expense	2,408			31,945			12,506			—			46,859
Depreciation	613			10,799			4,213			—			15,625
Amortization of intangibles	—			6,246			6,092			—			12,338
Total operating costs and expenses	41,764			512,543			200,184			(3,060		)	751,431
Operating (loss) income	(41,764		)	93,726			35,168			—			87,130
Equity in earnings of unconsolidated affiliates	96,076			19,940			541			(116,159		)	398
Interest expense	(12,995		)	(2,963		)	(34		)	—			(15,992		)
Other income, net	24,678			2,911			6,411			—			34,000
Earnings from continuing operations before income taxes	65,995			113,614			42,086			(116,159		)	105,536
Income tax provision	(401		)	(35,131		)	(4,978		)	—			(40,510		)
Earnings from continuing operations	65,594			78,483			37,108			(116,159		)	65,026
Earnings (loss) from discontinued operations, net of tax	17			—			(1		)	1			17
Net earnings	65,611			78,483			37,107			(116,158		)	65,043
Net loss attributable to noncontrolling interests	—			—			568			—			568
Net earnings attributable to IAC shareholders	$	65,611		$	78,483		$	37,675		$	(116,158	)	$	65,611
Comprehensive income attributable to IAC shareholders	$	51,418		$	80,157		$	26,935		$	(107,092	)	$	51,418

Statement of operations for the three months ended September 30, 2014:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	570,101		$	215,132		$	(3,002	)	$	782,231
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	387			128,968			96,028			(688		)	224,695
Selling and marketing expense	723			220,780			59,091			(2,273		)	278,321
General and administrative expense	28,046			56,955			21,976			10			106,987
Product development expense	1,935			28,131			10,676			(51		)	40,691
Depreciation	402			9,434			4,297			—			14,133
Amortization of intangibles	—			10,784			5,667			—			16,451
Total operating costs and expenses	31,493			455,052			197,735			(3,002		)	681,278
Operating (loss) income	(31,493		)	115,049			17,397			—			100,953
Equity in earnings (losses) of unconsolidated affiliates	89,209			17,246			95			(107,162		)	(612		)
Interest expense	(12,948		)	(1,050		)	(11		)	—			(14,009		)
Other (expense) income, net	(8,311		)	8,771			3,653			—			4,113
Earnings from continuing operations before income taxes	36,457			140,016			21,134			(107,162		)	90,445
Income tax benefit (provision)	114,625			(46,133		)	(8,676		)	—			59,816
Earnings from continuing operations	151,082			93,883			12,458			(107,162		)	150,261
Earnings from discontinued operations, net of tax	175,730			—			5			(5		)	175,730
Net earnings	326,812			93,883			12,463			(107,167		)	325,991
Net loss attributable to noncontrolling interests	—			—			821			—			821
Net earnings attributable to IAC shareholders	$	326,812		$	93,883		$	13,284		$	(107,167	)	$	326,812
Comprehensive income (loss) attributable to IAC shareholders	$	289,950		$	90,988		$	(23,904	)	$	(67,084	)	$	289,950

Statement of operations for the nine months ended September 30, 2015:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	1,787,137		$	604,172		$	(9,104	)	$	2,382,205
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	846			354,416			225,478			(650		)	580,090
Selling and marketing expense	3,315			829,308			190,086			(8,420		)	1,014,289
General and administrative expense	95,192			202,314			80,793			(34		)	378,265
Product development expense	6,915			94,075			37,556			—			138,546
Depreciation	1,440			33,489			11,764			—			46,693
Amortization of intangibles	—			18,742			20,562			—			39,304
Total operating costs and expenses	107,708			1,532,344			566,239			(9,104		)	2,197,187
Operating (loss) income	(107,708		)	254,793			37,933			—			185,018
Equity in earnings (losses) of unconsolidated affiliates	220,971			36,312			494			(257,855		)	(78		)
Interest expense	(38,977		)	(6,220		)	(73		)	—			(45,270		)
Other income (expense), net	7,571			32,767			(512		)	—			39,826
Earnings from continuing operations before income taxes	81,857			317,652			37,842			(257,855		)	179,496
Income tax benefit (provision)	69,475			(107,397		)	3,200			—			(34,722		)
Earnings from continuing operations	151,332			210,255			41,042			(257,855		)	144,774
(Loss) earnings from discontinued operations, net of tax	(11		)	—			2			(2		)	(11		)
Net earnings	151,321			210,255			41,044			(257,857		)	144,763
Net loss attributable to noncontrolling interests	—			—			6,558			—			6,558
Net earnings attributable to IAC shareholders	$	151,321		$	210,255		$	47,602		$	(257,857	)	$	151,321
Comprehensive income (loss) attributable to IAC shareholders	$	94,533		$	207,445		$	(10,827	)	$	(196,618	)	$	94,533

Statement of operations for the nine months ended September 30, 2014:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	1,672,589		$	615,536		$	(9,332	)	$	2,278,793
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	742			384,431			261,821			(2,335		)	644,659
Selling and marketing expense	1,534			677,273			177,013			(6,410		)	849,410
General and administrative expense	77,101			151,089			83,747			36			311,973
Product development expense	5,111			81,532			32,332			(623		)	118,352
Depreciation	1,043			28,219			14,946			—			44,208
Amortization of intangibles	—			29,444			12,392			—			41,836
Total operating costs and expenses	85,531			1,351,988			582,251			(9,332		)	2,010,438
Operating (loss) income	(85,531		)	320,601			33,285			—			268,355
Equity in earnings (losses) of unconsolidated affiliates	148,604			20,593			131			(178,725		)	(9,397		)
Interest expense	(38,918		)	(3,144		)	(57		)	—			(42,119		)
Other income (expense), net	11,077			(9,935		)	(59,952		)	—			(58,810		)
Earnings (loss) from continuing operations before income taxes	35,232			328,115			(26,593		)	(178,725		)	158,029
Income tax benefit (provision)	135,421			(115,862		)	(11,017		)	—			8,542
Earnings (loss) from continuing operations	170,653			212,253			(37,610		)	(178,725		)	166,571
Earnings (loss) from discontinued operations, net of tax	174,048			—			(35		)	35			174,048
Net earnings (loss)	344,701			212,253			(37,645		)	(178,690		)	340,619
Net loss attributable to noncontrolling interests	—			—			4,082			—			4,082
Net earnings (loss) attributable to IAC shareholders	$	344,701		$	212,253		$	(33,563	)	$	(178,690	)	$	344,701
Comprehensive income (loss) attributable to IAC shareholders	$	310,979		$	209,078		$	(69,668	)	$	(139,410	)	$	310,979

Statement of cash flows for the nine months ended September 30, 2015:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			IAC Consolidated
	(In thousands)
Net cash (used in) provided by operating activities attributable to continuing operations	$	(145,714	)	$	310,471		$	19,350		$	184,107
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	—			(3,675		)	(39,611		)	(43,286		)
Capital expenditures	(1,051		)	(30,647		)	(12,860		)	(44,558		)
Proceeds from maturities and sales of marketable debt securities	192,928			—			—			192,928
Purchases of marketable debt securities	(93,134		)	—			—			(93,134		)
Purchases of long-term investments	—			—			(25,073		)	(25,073		)
Other, net	4,890			(1,097		)	663			4,456
Net cash provided by (used in) investing activities attributable to continuing operations	103,633			(35,419		)	(76,881		)	(8,667		)
Cash flows from financing activities attributable to continuing operations:
Purchase of treasury stock	(200,000		)	—			—			(200,000		)
Dividends	(84,947		)	—			—			(84,947		)
Principal payment on long-term debt	—			(80,000		)	—			(80,000		)
Issuance of common stock, net of withholding taxes	(40,197		)	—			—			(40,197		)
Excess tax benefits from stock-based awards	49,016			—			131			49,147
Purchase of noncontrolling interests	—			—			(29,899		)	(29,899		)
Acquisition-related contingent consideration payments	—			(202		)	(5,510		)	(5,712		)
Intercompany	(87,832		)	(195,884		)	283,716			—
Other, net	166			—			346			512
Net cash (used in) provided by financing activities attributable to continuing operations	(363,794		)	(276,086		)	248,784			(391,096		)
Total cash (used in) provided by continuing operations	(405,875		)	(1,034		)	191,253			(215,656		)
Total cash (used in) provided by discontinued operations	(192		)	—			2			(190		)
Effect of exchange rate changes on cash and cash equivalents	—			13			(8,124		)	(8,111		)
Net (decrease) increase in cash and cash equivalents	(406,067		)	(1,021		)	183,131			(223,957		)
Cash and cash equivalents at beginning of period	766,076			1,021			223,308			990,405
Cash and cash equivalents at end of period	$	360,009		$	—		$	406,439		$	766,448

Statement of cash flows for the nine months ended September 30, 2014:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			IAC Consolidated
	(In thousands)
Net cash (used in) provided by operating activities attributable to continuing operations	$	(50,458	)	$	350,889		$	(5,770	)	$	294,661
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	—			(191,223		)	(52,973		)	(244,196		)
Capital expenditures	(2,375		)	(25,866		)	(10,792		)	(39,033		)
Proceeds from maturities and sales of marketable debt securities	998			—			—			998
Purchases of marketable debt securities	(110,886		)	—			—			(110,886		)
Purchases of long-term investments	(3,000		)	(7,043		)	(7,660		)	(17,703		)
Other, net	—			10			11,914			11,924
Net cash used in investing activities attributable to continuing operations	(115,263		)	(224,122		)	(59,511		)	(398,896		)
Cash flows from financing activities attributable to continuing operations:
Dividends	(68,505		)	—			—			(68,505		)
Issuance of common stock, net of withholding taxes	(4,823		)	—			—			(4,823		)
Excess tax benefits from stock-based awards	31,041			—			10,279			41,320
Purchase of noncontrolling interests	—			(30,000		)	(328		)	(30,328		)
Funds returned from escrow for Meetic tender offer	—			—			12,354			12,354
Acquisition-related contingent consideration payments	—			(286		)	(7,373		)	(7,659		)
Intercompany	106,215			(90,996		)	(15,219		)	—
Other, net	(382		)	(1,343		)	328			(1,397		)
Net cash provided by (used in) financing activities attributable to continuing operations	63,546			(122,625		)	41			(59,038		)
Total cash (used in) provided by continuing operations	(102,175		)	4,142			(65,240		)	(163,273		)
Total cash used in discontinued operations	(136		)	—			(35		)	(171		)
Effect of exchange rate changes on cash and cash equivalents	—			131			(5,419		)	(5,288		)
Net (decrease) increase in cash and cash equivalents	(102,311		)	4,273			(70,694		)	(168,732		)
Cash and cash equivalents at beginning of period	782,022			—			318,422			1,100,444
Cash and cash equivalents at end of period	$	679,711		$	4,273		$	247,728		$	931,712

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP").
Basis of Consolidation and Accounting for Investments	Basis of Consolidation and Accounting for Investments The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated. Investments in the common stock or in-substance common stock of entities in which the Company has the ability to exercise significant influence over the operating and financial matters of the investee, but does not have a controlling financial interest, are accounted for using the equity method and are included in "Long-term investments" in the accompanying consolidated balance sheet. The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the rules and regulations of the SEC. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited consolidated financial statements include all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation. Interim results are not necessarily indicative of the results that may be expected for the full year. The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014.
Accounting Estimates	Accounting Estimates The preparation of consolidated financial statements in accordance with GAAP requires management to make certain estimates, judgments and assumptions that impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of contingent assets and liabilities. Actual results could differ from these estimates. On an ongoing basis, the Company evaluates its estimates and judgments including those related to: the fair values of marketable securities and other investments; the recoverability of goodwill and indefinite-lived intangible assets; the useful lives and recoverability of definite-lived intangible assets and property and equipment; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts and revenue reserves; the fair value of acquisition-related contingent consideration; the liabilities for uncertain tax positions; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that the Company considers relevant.
Certain Risks and Concentrations	Certain Risks and Concentrations A substantial portion of the Company's revenue is derived from online advertising, the market for which is highly competitive and rapidly changing. Significant changes in this industry or changes in advertising spending behavior or in customer buying behavior could adversely affect our operating results. Most of the Company's online advertising revenue is attributable to a services agreement with Google Inc. ("Google"). On October 26, 2015, the Company and Google entered into a services agreement that is effective as of April 1, 2016, following the expiration of the current services agreement, and expires on March 31, 2020. The Company may choose to terminate the agreement effective March 31, 2019. These services agreements require that we comply with certain guidelines promulgated by Google. Subject to certain limitations, Google may unilaterally update its policies and guidelines, which could require modifications to, or prohibit and/or render obsolete certain of our products, services and/or business practices, which could be costly to address or otherwise have an adverse effect on our business, financial condition and results of operations.
Recent Accounting Pronouncement	Recent Accounting Pronouncement In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, which clarifies the principles for recognizing revenue and develops a common standard for all industries. In July 2015, the FASB decided to defer the effective date for annual reporting periods beginning after December 15, 2017. Early adoption is permitted beginning on the original effective date of December 15, 2016. Upon adoption, ASU No. 2014-09 may either be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the new guidance and has not yet determined whether the adoption of the new standard will have a material impact on its consolidated financial statements or the method and timing of adoption.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.

MARKETABLE SECURITIES (Tables)

9 Months Ended

Sep. 30, 2015

Marketable Securities [Abstract]

Schedule of current available-for-sale marketable securities

At September 30, 2015, current available-for-sale marketable securities are as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Corporate debt securities	$	53,600	$	7	$	(129	)	$	53,478
Equity security	98		361		—			459
Total marketable securities	$	53,698	$	368	$	(129	)	$	53,937

At December 31, 2014, current available-for-sale marketable securities are as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Corporate debt securities	$	159,418	$	34	$	(255	)	$	159,197
Equity security	98		1,353		—			1,451
Total marketable securities	$	159,516	$	1,387	$	(255	)	$	160,648

Schedule of contractual maturities of debt securities classified as available-for-sale

The contractual maturities of debt securities classified as current available-for-sale at September 30, 2015 are as follows:



	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	4,374	$	4,370
Due after one year through five years	49,226		49,108
Total	$	53,600	$	53,478

Schedule of proceeds from maturities and sales of current and non-current available-for-sale marketable securities and the related gross realized gains and losses

The following table presents the proceeds from maturities and sales of current and non-current available-for-sale marketable securities and the related gross realized gains:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
	(In thousands)
Proceeds from maturities and sales of available-for-sale marketable securities	$	178,315	$	1,114	$	192,928	$	4,576
Gross realized gains	17		1,063		22		3,362

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Schedule of assets measured at fair value on a recurring basis

The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:



	September 30, 2015
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	375,094	$	—	$	—		$	375,094
Time deposits	—		45,005		—			45,005
Commercial paper	—		8,999		—			8,999
Marketable securities:
Corporate debt securities	—		53,478		—			53,478
Equity security	459		—		—			459
Long-term investments:
Auction rate security	—		—		5,010			5,010
Marketable equity security	9,594		—		—			9,594
Total	$	385,147	$	107,482	$	5,010		$	497,639

Liabilities:
Contingent consideration arrangements	$	—	$	—	$	(31,470	)	$	(31,470	)



	December 31, 2014
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	174,720	$	—	$	—		$	174,720
Time deposits	—		42,914		—			42,914
Commercial paper	—		388,801		—			388,801
Marketable securities:
Corporate debt securities	—		159,197		—			159,197
Equity security	1,451		—		—			1,451
Long-term investments:
Auction rate security	—		—		6,070			6,070
Marketable equity security	7,410		—		—			7,410
Total	$	183,581	$	590,912	$	6,070		$	780,563

Liabilities:
Contingent consideration arrangements	$	—	$	—	$	(30,140	)	$	(30,140	)

Schedule of changes in assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

The following tables present the changes in the Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):



	Three Months Ended September 30,
	2015						2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at July 1	$	6,630		$	(31,858	)	$	9,250		$	(41,397	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			960			—			14,281
Included in other comprehensive (loss) income	(1,620		)	(579		)	(670		)	1,918
Settlements	—			7			—			29
Balance at September 30	$	5,010		$	(31,470	)	$	8,580		$	(25,169	)



	Nine Months Ended September 30,
	2015						2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at January 1	$	6,070		$	(30,140	)	$	8,920		$	(45,828	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			17,906			—			13,781
Foreign currency exchange gains	—			626			—			—
Included in other comprehensive (loss) income	(1,060		)	1,538			(340		)	2,054
Fair value at date of acquisition	—			(27,112		)	—			(2,835		)
Settlements	—			5,712			—			7,659
Balance at September 30	$	5,010		$	(31,470	)	$	8,580		$	(25,169	)

Schedule of changes in liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

The following tables present the changes in the Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):



	Three Months Ended September 30,
	2015						2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at July 1	$	6,630		$	(31,858	)	$	9,250		$	(41,397	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			960			—			14,281
Included in other comprehensive (loss) income	(1,620		)	(579		)	(670		)	1,918
Settlements	—			7			—			29
Balance at September 30	$	5,010		$	(31,470	)	$	8,580		$	(25,169	)



	Nine Months Ended September 30,
	2015						2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at January 1	$	6,070		$	(30,140	)	$	8,920		$	(45,828	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			17,906			—			13,781
Foreign currency exchange gains	—			626			—			—
Included in other comprehensive (loss) income	(1,060		)	1,538			(340		)	2,054
Fair value at date of acquisition	—			(27,112		)	—			(2,835		)
Settlements	—			5,712			—			7,659
Balance at September 30	$	5,010		$	(31,470	)	$	8,580		$	(25,169	)

Carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes

The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:



	September 30, 2015						December 31, 2014
	Carrying Value			Fair Value			Carrying Value			Fair Value
	(In thousands)
Long-term debt	$	(1,000,000	)	$	(990,050	)	$	(1,080,000	)	$	(1,099,813	)

LONG-TERM DEBT (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Schedule of Long-term Debt

Long-term debt consists of:



	September 30, 2015		December 31, 2014
	(In thousands)
4.875% Senior Notes due November 30, 2018 (the "2013 Senior Notes"); interest payable each May 30 and November 30, which commenced May 30, 2014	$	500,000	$	500,000
4.75% Senior Notes due December 15, 2022 (the "2012 Senior Notes"); interest payable each June 15 and December 15, which commenced June 15, 2013	500,000		500,000
5% New York City Industrial Development Agency Liberty Bonds due September 1, 2035 (the "Liberty Bonds"); interest payable each March 1 and September 1, which commenced March 1, 2006	—		80,000
Total long-term debt	$	1,000,000	$	1,080,000

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Schedule of accumulated other comprehensive loss

The following tables present the components of accumulated other comprehensive (loss) income.



	Three Months Ended September 30, 2015
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities				Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of July 1	$	(133,895	)	$	3,600			$	(130,295	)
Other comprehensive loss, net of tax benefit of $0.1 million related to unrealized losses on available-for-sale securities	(8,420		)	(3,501		)		(11,921		)
Amounts reclassified to earnings	(2,191		)	(81		)	^(a)	(2,272		)
Net current period other comprehensive loss	(10,611		)	(3,582		)		(14,193		)
Balance as of September 30	$	(144,506	)	$	18			$	(144,488	)

_________________________________________

^(a) Amount is net of a tax provision of $0.1 million.



	Three Months Ended September 30, 2014
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of July 1	$	(15,282	)	$	5,376		$	(9,906	)
Other comprehensive (loss) income before reclassifications, net of tax provision of $0.2 million related to unrealized losses on available-for-sale securities	(36,428		)	231			(36,197		)
Amounts reclassified to earnings related to unrealized gains on available-for-sale securities, net of tax provision of $0.4 million	—			(665		)	(665		)
Net current period other comprehensive loss	(36,428		)	(434		)	(36,862		)
Balance as of September 30	$	(51,710	)	$	4,942		$	(46,768	)



	Nine Months Ended September 30, 2015
	Foreign Currency Translation Adjustment			Unrealized (Losses) Gains On Available-For-Sale Securities				Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of January 1	$	(86,848	)	$	(852	)		$	(87,700	)
Other comprehensive (loss) income, net of tax benefit of $0.3 million related to unrealized losses on available-for-sale securities	(55,467		)	788				(54,679		)
Amounts reclassified to earnings	(2,191		)	82			^(b)	(2,109		)
Net current period other comprehensive (loss) income	(57,658		)	870				(56,788		)
Balance as of September 30	$	(144,506	)	$	18			$	(144,488	)

_________________________________________

^(b) Amount is net of a tax benefit of $0.1 million.



	Nine Months Ended September 30, 2014
	Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
	(In thousands)
Balance as of January 1	$	(20,352	)	$	7,306		$	(13,046	)
Other comprehensive loss before reclassifications, net of tax benefit of $0.5 million related to unrealized losses on available-for-sale securities	(31,358		)	(439		)	(31,797		)
Amounts reclassified to earnings related to unrealized gains on available-for-sale securities, net of tax provision of $1.2 million	—			(1,925		)	(1,925		)
Net current period other comprehensive loss	(31,358		)	(2,364		)	(33,722		)
Balance as of September 30	$	(51,710	)	$	4,942		$	(46,768	)

EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

The following tables set forth the computation of basic and diluted earnings per share attributable to IAC shareholders.



	Three Months Ended September 30,
	2015				2014
	Basic		Diluted		Basic		Diluted
	(In thousands, except per share data)
Numerator:
Earnings from continuing operations	$	65,026	$	65,026	$	150,261	$	150,261
Net loss attributable to noncontrolling interests	568		568		821		821
Earnings from continuing operations attributable to IAC shareholders	65,594		65,594		151,082		151,082
Earnings from discontinued operations attributable to IAC shareholders	17		17		175,730		175,730
Net earnings attributable to IAC shareholders	$	65,611	$	65,611	$	326,812	$	326,812

Denominator:
Weighted average basic shares outstanding	82,910		82,910		83,591		83,591
Dilutive securities including stock options and RSUs^(a)(b)	—		5,990		—		5,199
Denominator for earnings per share—weighted average shares^(a)(b)	82,910		88,900		83,591		88,790

Earnings per share attributable to IAC shareholders:
Earnings per share from continuing operations	$	0.79	$	0.74	$	1.81	$	1.70
Discontinued operations	—		—		2.10		1.98
Earnings per share	$	0.79	$	0.74	$	3.91	$	3.68



	Nine Months Ended September 30,
	2015						2014
	Basic			Diluted			Basic		Diluted
	(In thousands, except per share data)
Numerator:
Earnings from continuing operations	$	144,774		$	144,774		$	166,571	$	166,571
Net loss attributable to noncontrolling interests	6,558			6,558			4,082		4,082
Earnings from continuing operations attributable to IAC shareholders	151,332			151,332			170,653		170,653
(Loss) earnings from discontinued operations attributable to IAC shareholders	(11		)	(11		)	174,048		174,048
Net earnings attributable to IAC shareholders	$	151,321		$	151,321		$	344,701	$	344,701

Denominator:
Weighted average basic shares outstanding	82,924			82,924			83,088		83,088
Dilutive securities including stock options and RSUs^(a)(b)	—			5,323			—		5,167
Denominator for earnings per share—weighted average shares^(a)(b)	82,924			88,247			83,088		88,255

Earnings per share attributable to IAC shareholders:
Earnings per share from continuing operations	$	1.82		$	1.71		$	2.05	$	1.93
Discontinued operations	—			—			2.10		1.98
Earnings per share	$	1.82		$	1.71		$	4.15	$	3.91

_________________________________________

SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Schedule of reconciliation of revenues from segments to consolidated



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Revenue:
Search & Applications	$	377,142		$	394,659		$	1,111,406		$	1,188,410
The Match Group	274,231			230,198			768,132			655,699
Media	57,278			49,895			137,100			122,906
eCommerce	130,031			107,825			366,027			312,616
Inter-segment eliminations	(121		)	(346		)	(460		)	(838		)
Total	$	838,561		$	782,231		$	2,382,205		$	2,278,793

Schedule of reconciliation of operating income (loss) from segments to consolidated



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Operating Income (Loss):
Search & Applications	$	65,391		$	80,384		$	198,283		$	228,492
The Match Group	71,912			66,393			148,665			167,394
Media	(8,252		)	(8,723		)	(37,379		)	(27,083		)
eCommerce	4,243			(1,585		)	(3,615		)	(3,138		)
Corporate	(46,164		)	(35,516		)	(120,936		)	(97,310		)
Total	$	87,130		$	100,953		$	185,018		$	268,355

Schedule of reconciliation of Adjusted EBITDA from segments to consolidated



	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Adjusted EBITDA:
Search & Applications	$	74,391		$	93,127		$	226,202		$	266,456
The Match Group	84,339			61,371			175,017			178,169
Media	(7,746		)	(7,702		)	(37,781		)	(24,477		)
eCommerce	7,713			3,865			7,257			11,192
Corporate	(17,555		)	(16,073		)	(45,717		)	(47,225		)
Total	$	141,142		$	134,588		$	324,978		$	384,115

Schedule of revenue and long-lived assets, excluding goodwill and intangible assets, by geography

Revenue by geography is based on where the customer is located. Geographic information about revenue and long-lived assets is presented below:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
	(In thousands)
Revenue:
United States	$	619,297	$	544,486	$	1,755,534	$	1,560,751
All other countries	219,264		237,745		626,671		718,042
Total	$	838,561	$	782,231	$	2,382,205	$	2,278,793



	September 30, 2015		December 31, 2014
	(In thousands)
Long-lived assets (excluding goodwill and intangible assets):
United States	$	278,970	$	281,879
All other countries	20,108		20,580
Total	$	299,078	$	302,459

Schedule of reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments

The following tables reconcile Adjusted EBITDA to operating income (loss) for the Company's reportable segments:



	Three Months Ended September 30, 2015
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments			Operating Income (Loss)
	(In thousands)
Search & Applications	$	74,391		$	—		$	(3,777	)	$	(6,736	)	$	1,513		$	65,391
The Match Group	84,339			(1,147		)	(6,173		)	(4,352		)	(755		)	71,912
Media	(7,746		)	(50		)	(280		)	(378		)	202			(8,252		)
eCommerce	7,713			(410		)	(2,188		)	(872		)	—			4,243
Corporate	(17,555		)	(25,402		)	(3,207		)	—			—			(46,164		)
Total	$	141,142		$	(27,009	)	$	(15,625	)	$	(12,338	)	$	960		$	87,130



	Three Months Ended September 30, 2014
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments		Operating Income (Loss)
	(In thousands)
Search & Applications	$	93,127		$	—		$	(3,596	)	$	(9,147	)	$	—	$	80,384
The Match Group	61,371			(145		)	(5,794		)	(3,320		)	14,281		66,393
Media	(7,702		)	(161		)	(225		)	(635		)	—		(8,723		)
eCommerce	3,865			(138		)	(1,963		)	(3,349		)	—		(1,585		)
Corporate	(16,073		)	(16,888		)	(2,555		)	—			—		(35,516		)
Total	$	134,588		$	(17,332	)	$	(14,133	)	$	(16,451	)	$	14,281	$	100,953



	Nine Months Ended September 30, 2015
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments		Operating Income (Loss)
	(In thousands)
Search & Applications	$	226,202		$	—		$	(11,078	)	$	(20,631	)	$	3,790	$	198,283
The Match Group	175,017			(3,816		)	(19,885		)	(14,130		)	11,479		148,665
Media	(37,781		)	(344		)	(712		)	(1,179		)	2,637		(37,379		)
eCommerce	7,257			(1,250		)	(6,258		)	(3,364		)	—		(3,615		)
Corporate	(45,717		)	(66,459		)	(8,760		)	—			—		(120,936		)
Total	$	324,978		$	(71,869	)	$	(46,693	)	$	(39,304	)	$	17,906	$	185,018



	Nine Months Ended September 30, 2014
	Adjusted EBITDA			Stock-Based Compensation Expense			Depreciation			Amortization of Intangibles			Acquisition-related Contingent Consideration Fair Value Adjustments		Operating Income (Loss)
	(In thousands)
Search & Applications	$	266,456		$	—		$	(13,143	)	$	(24,821	)	$	—	$	228,492
The Match Group	178,169			(332		)	(17,183		)	(6,841		)	13,581		167,394
Media	(24,477		)	(486		)	(731		)	(1,589		)	200		(27,083		)
eCommerce	11,192			(138		)	(5,607		)	(8,585		)	—		(3,138		)
Corporate	(47,225		)	(42,541		)	(7,544		)	—			—		(97,310		)
Total	$	384,115		$	(43,497	)	$	(44,208	)	$	(41,836	)	$	13,781	$	268,355

CONSOLIDATED FINANCIAL STATEMENT DETAILS (Tables)

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Other Income (Expense), Net

Other income (expense), net consists of:



	Three Months Ended September 30,					Nine Months Ended September 30,
	2015			2014		2015			2014
	(In thousands)
Gain on real estate transaction	$	33,586		$	—	$	33,586		$	—
Impairment of long-term investments	(804		)	—		(1,304		)	(64,281		)
Foreign currency exchange gains (losses)	308			2,210		4,838			(612		)
Other	910			1,903		2,706			6,083
Total	$	34,000		$	4,113	$	39,826		$	(58,810	)

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Tables)

9 Months Ended

Sep. 30, 2015

Guarantor and Nonguarantor Financial Statements [Abstract]

Schedule of condensed balance sheet

Balance sheet at September 30, 2015:



	IAC		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Total Eliminations			IAC Consolidated
	(In thousands)
Cash and cash equivalents	$	360,009	$	—	$	406,439	$	—		$	766,448
Marketable securities	53,477		—		460		—			53,937
Accounts receivable, net	9		147,175		99,794		—			246,978
Other current assets	7,261		93,121		82,236		(3,735		)	178,883
Intercompany receivables	—		1,557,881		779,941		(2,337,822		)	—
Property and equipment, net	4,574		228,159		66,345		—			299,078
Goodwill	—		1,247,038		522,103		—			1,769,141
Intangible assets, net	—		307,079		152,842		—			459,921
Investment in subsidiaries	5,033,588		957,866		—		(5,991,454		)	—
Other non-current assets	92,132		28,897		139,963		(8,060		)	252,932
Total assets	$	5,551,050	$	4,567,216	$	2,250,123	$	(8,341,071	)	$	4,027,318

Accounts payable, trade	$	2,865	$	34,991	$	30,592	$	—		$	68,448
Other current liabilities	54,163		326,379		204,453		14			585,009
Long-term debt	1,000,000		—		—		—			1,000,000
Income taxes payable	858		4,531		18,252		—			23,641
Intercompany liabilities	2,337,822		—		—		(2,337,822		)	—
Other long-term liabilities	310,151		105,074		76,386		(11,809		)	479,802
Redeemable noncontrolling interests	—		—		25,227		—			25,227
IAC shareholders' equity	1,845,191		4,096,241		1,895,213		(5,991,454		)	1,845,191
Total liabilities and shareholders' equity	$	5,551,050	$	4,567,216	$	2,250,123	$	(8,341,071	)	$	4,027,318

Balance sheet at December 31, 2014:



	IAC		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Total Eliminations			IAC Consolidated
	(In thousands)
Cash and cash equivalents	$	766,076	$	1,021	$	223,308	$	—		$	990,405
Marketable securities	159,197		—		1,451		—			160,648
Accounts receivable, net	13		155,262		80,811		—			236,086
Other current assets	23,923		91,105		57,487		(5,773		)	166,742
Intercompany receivables	—		1,688,403		970,810		(2,659,213		)	—
Property and equipment, net	4,950		232,819		64,690		—			302,459
Goodwill	—		1,249,807		505,119		—			1,754,926
Intangible assets, net	—		325,771		166,165		—			491,936
Investment in subsidiaries	5,035,304		930,443		—		(5,965,747		)	—
Other non-current assets	44,610		20,682		109,372		(2,988		)	171,676
Total assets	$	6,034,073	$	4,695,313	$	2,179,213	$	(8,633,721	)	$	4,274,878

Accounts payable, trade	$	3,059	$	55,320	$	22,784	$	—		$	81,163
Other current liabilities	73,491		328,920		191,197		(817		)	592,791
Long-term debt	1,000,000		80,000		—		—			1,080,000
Income taxes payable	2,240		4,771		25,624		—			32,635
Intercompany liabilities	2,659,213		—		—		(2,659,213		)	—
Other long-term liabilities	304,117		104,219		54,328		(7,944		)	454,720
Redeemable noncontrolling interests	—		—		40,427		—			40,427
IAC shareholders' equity	1,991,953		4,122,083		1,843,664		(5,965,747		)	1,991,953
Noncontrolling interests	—		—		1,189		—			1,189
Total liabilities and shareholders' equity	$	6,034,073	$	4,695,313	$	2,179,213	$	(8,633,721	)	$	4,274,878

Schedule of condensed income statement

Statement of operations for the three months ended September 30, 2015:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	606,269		$	235,352		$	(3,060	)	$	838,561
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	307			117,292			87,922			(260		)	205,261
Selling and marketing expense	1,250			276,036			62,741			(2,801		)	337,226
General and administrative expense	37,186			70,225			26,710			1			134,122
Product development expense	2,408			31,945			12,506			—			46,859
Depreciation	613			10,799			4,213			—			15,625
Amortization of intangibles	—			6,246			6,092			—			12,338
Total operating costs and expenses	41,764			512,543			200,184			(3,060		)	751,431
Operating (loss) income	(41,764		)	93,726			35,168			—			87,130
Equity in earnings of unconsolidated affiliates	96,076			19,940			541			(116,159		)	398
Interest expense	(12,995		)	(2,963		)	(34		)	—			(15,992		)
Other income, net	24,678			2,911			6,411			—			34,000
Earnings from continuing operations before income taxes	65,995			113,614			42,086			(116,159		)	105,536
Income tax provision	(401		)	(35,131		)	(4,978		)	—			(40,510		)
Earnings from continuing operations	65,594			78,483			37,108			(116,159		)	65,026
Earnings (loss) from discontinued operations, net of tax	17			—			(1		)	1			17
Net earnings	65,611			78,483			37,107			(116,158		)	65,043
Net loss attributable to noncontrolling interests	—			—			568			—			568
Net earnings attributable to IAC shareholders	$	65,611		$	78,483		$	37,675		$	(116,158	)	$	65,611
Comprehensive income attributable to IAC shareholders	$	51,418		$	80,157		$	26,935		$	(107,092	)	$	51,418

Statement of operations for the three months ended September 30, 2014:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	570,101		$	215,132		$	(3,002	)	$	782,231
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	387			128,968			96,028			(688		)	224,695
Selling and marketing expense	723			220,780			59,091			(2,273		)	278,321
General and administrative expense	28,046			56,955			21,976			10			106,987
Product development expense	1,935			28,131			10,676			(51		)	40,691
Depreciation	402			9,434			4,297			—			14,133
Amortization of intangibles	—			10,784			5,667			—			16,451
Total operating costs and expenses	31,493			455,052			197,735			(3,002		)	681,278
Operating (loss) income	(31,493		)	115,049			17,397			—			100,953
Equity in earnings (losses) of unconsolidated affiliates	89,209			17,246			95			(107,162		)	(612		)
Interest expense	(12,948		)	(1,050		)	(11		)	—			(14,009		)
Other (expense) income, net	(8,311		)	8,771			3,653			—			4,113
Earnings from continuing operations before income taxes	36,457			140,016			21,134			(107,162		)	90,445
Income tax benefit (provision)	114,625			(46,133		)	(8,676		)	—			59,816
Earnings from continuing operations	151,082			93,883			12,458			(107,162		)	150,261
Earnings from discontinued operations, net of tax	175,730			—			5			(5		)	175,730
Net earnings	326,812			93,883			12,463			(107,167		)	325,991
Net loss attributable to noncontrolling interests	—			—			821			—			821
Net earnings attributable to IAC shareholders	$	326,812		$	93,883		$	13,284		$	(107,167	)	$	326,812
Comprehensive income (loss) attributable to IAC shareholders	$	289,950		$	90,988		$	(23,904	)	$	(67,084	)	$	289,950

Statement of operations for the nine months ended September 30, 2015:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	1,787,137		$	604,172		$	(9,104	)	$	2,382,205
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	846			354,416			225,478			(650		)	580,090
Selling and marketing expense	3,315			829,308			190,086			(8,420		)	1,014,289
General and administrative expense	95,192			202,314			80,793			(34		)	378,265
Product development expense	6,915			94,075			37,556			—			138,546
Depreciation	1,440			33,489			11,764			—			46,693
Amortization of intangibles	—			18,742			20,562			—			39,304
Total operating costs and expenses	107,708			1,532,344			566,239			(9,104		)	2,197,187
Operating (loss) income	(107,708		)	254,793			37,933			—			185,018
Equity in earnings (losses) of unconsolidated affiliates	220,971			36,312			494			(257,855		)	(78		)
Interest expense	(38,977		)	(6,220		)	(73		)	—			(45,270		)
Other income (expense), net	7,571			32,767			(512		)	—			39,826
Earnings from continuing operations before income taxes	81,857			317,652			37,842			(257,855		)	179,496
Income tax benefit (provision)	69,475			(107,397		)	3,200			—			(34,722		)
Earnings from continuing operations	151,332			210,255			41,042			(257,855		)	144,774
(Loss) earnings from discontinued operations, net of tax	(11		)	—			2			(2		)	(11		)
Net earnings	151,321			210,255			41,044			(257,857		)	144,763
Net loss attributable to noncontrolling interests	—			—			6,558			—			6,558
Net earnings attributable to IAC shareholders	$	151,321		$	210,255		$	47,602		$	(257,857	)	$	151,321
Comprehensive income (loss) attributable to IAC shareholders	$	94,533		$	207,445		$	(10,827	)	$	(196,618	)	$	94,533

Statement of operations for the nine months ended September 30, 2014:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	1,672,589		$	615,536		$	(9,332	)	$	2,278,793
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	742			384,431			261,821			(2,335		)	644,659
Selling and marketing expense	1,534			677,273			177,013			(6,410		)	849,410
General and administrative expense	77,101			151,089			83,747			36			311,973
Product development expense	5,111			81,532			32,332			(623		)	118,352
Depreciation	1,043			28,219			14,946			—			44,208
Amortization of intangibles	—			29,444			12,392			—			41,836
Total operating costs and expenses	85,531			1,351,988			582,251			(9,332		)	2,010,438
Operating (loss) income	(85,531		)	320,601			33,285			—			268,355
Equity in earnings (losses) of unconsolidated affiliates	148,604			20,593			131			(178,725		)	(9,397		)
Interest expense	(38,918		)	(3,144		)	(57		)	—			(42,119		)
Other income (expense), net	11,077			(9,935		)	(59,952		)	—			(58,810		)
Earnings (loss) from continuing operations before income taxes	35,232			328,115			(26,593		)	(178,725		)	158,029
Income tax benefit (provision)	135,421			(115,862		)	(11,017		)	—			8,542
Earnings (loss) from continuing operations	170,653			212,253			(37,610		)	(178,725		)	166,571
Earnings (loss) from discontinued operations, net of tax	174,048			—			(35		)	35			174,048
Net earnings (loss)	344,701			212,253			(37,645		)	(178,690		)	340,619
Net loss attributable to noncontrolling interests	—			—			4,082			—			4,082
Net earnings (loss) attributable to IAC shareholders	$	344,701		$	212,253		$	(33,563	)	$	(178,690	)	$	344,701
Comprehensive income (loss) attributable to IAC shareholders	$	310,979		$	209,078		$	(69,668	)	$	(139,410	)	$	310,979

Schedule of condensed cash flow statement

Statement of cash flows for the nine months ended September 30, 2015:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			IAC Consolidated
	(In thousands)
Net cash (used in) provided by operating activities attributable to continuing operations	$	(145,714	)	$	310,471		$	19,350		$	184,107
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	—			(3,675		)	(39,611		)	(43,286		)
Capital expenditures	(1,051		)	(30,647		)	(12,860		)	(44,558		)
Proceeds from maturities and sales of marketable debt securities	192,928			—			—			192,928
Purchases of marketable debt securities	(93,134		)	—			—			(93,134		)
Purchases of long-term investments	—			—			(25,073		)	(25,073		)
Other, net	4,890			(1,097		)	663			4,456
Net cash provided by (used in) investing activities attributable to continuing operations	103,633			(35,419		)	(76,881		)	(8,667		)
Cash flows from financing activities attributable to continuing operations:
Purchase of treasury stock	(200,000		)	—			—			(200,000		)
Dividends	(84,947		)	—			—			(84,947		)
Principal payment on long-term debt	—			(80,000		)	—			(80,000		)
Issuance of common stock, net of withholding taxes	(40,197		)	—			—			(40,197		)
Excess tax benefits from stock-based awards	49,016			—			131			49,147
Purchase of noncontrolling interests	—			—			(29,899		)	(29,899		)
Acquisition-related contingent consideration payments	—			(202		)	(5,510		)	(5,712		)
Intercompany	(87,832		)	(195,884		)	283,716			—
Other, net	166			—			346			512
Net cash (used in) provided by financing activities attributable to continuing operations	(363,794		)	(276,086		)	248,784			(391,096		)
Total cash (used in) provided by continuing operations	(405,875		)	(1,034		)	191,253			(215,656		)
Total cash (used in) provided by discontinued operations	(192		)	—			2			(190		)
Effect of exchange rate changes on cash and cash equivalents	—			13			(8,124		)	(8,111		)
Net (decrease) increase in cash and cash equivalents	(406,067		)	(1,021		)	183,131			(223,957		)
Cash and cash equivalents at beginning of period	766,076			1,021			223,308			990,405
Cash and cash equivalents at end of period	$	360,009		$	—		$	406,439		$	766,448

Statement of cash flows for the nine months ended September 30, 2014:



	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			IAC Consolidated
	(In thousands)
Net cash (used in) provided by operating activities attributable to continuing operations	$	(50,458	)	$	350,889		$	(5,770	)	$	294,661
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	—			(191,223		)	(52,973		)	(244,196		)
Capital expenditures	(2,375		)	(25,866		)	(10,792		)	(39,033		)
Proceeds from maturities and sales of marketable debt securities	998			—			—			998
Purchases of marketable debt securities	(110,886		)	—			—			(110,886		)
Purchases of long-term investments	(3,000		)	(7,043		)	(7,660		)	(17,703		)
Other, net	—			10			11,914			11,924
Net cash used in investing activities attributable to continuing operations	(115,263		)	(224,122		)	(59,511		)	(398,896		)
Cash flows from financing activities attributable to continuing operations:
Dividends	(68,505		)	—			—			(68,505		)
Issuance of common stock, net of withholding taxes	(4,823		)	—			—			(4,823		)
Excess tax benefits from stock-based awards	31,041			—			10,279			41,320
Purchase of noncontrolling interests	—			(30,000		)	(328		)	(30,328		)
Funds returned from escrow for Meetic tender offer	—			—			12,354			12,354
Acquisition-related contingent consideration payments	—			(286		)	(7,373		)	(7,659		)
Intercompany	106,215			(90,996		)	(15,219		)	—
Other, net	(382		)	(1,343		)	328			(1,397		)
Net cash provided by (used in) financing activities attributable to continuing operations	63,546			(122,625		)	41			(59,038		)
Total cash (used in) provided by continuing operations	(102,175		)	4,142			(65,240		)	(163,273		)
Total cash used in discontinued operations	(136		)	—			(35		)	(171		)
Effect of exchange rate changes on cash and cash equivalents	—			131			(5,419		)	(5,288		)
Net (decrease) increase in cash and cash equivalents	(102,311		)	4,273			(70,694		)	(168,732		)
Cash and cash equivalents at beginning of period	782,022			—			318,422			1,100,444
Cash and cash equivalents at end of period	$	679,711		$	4,273		$	247,728		$	931,712

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands				3 Months Ended		9 Months Ended
	Nov. 02, 2015	Oct. 28, 2015 USD ($)	Jul. 14, 2015 USD ($)	Sep. 30, 2015 USD ($) country	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment country	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Revenue from major customers
Number of operating segments \| segment						4
Number of countries where brands and products reach users (more than) \| country				200		200
Revenue				$ 838,561	$ 782,231	$ 2,382,205	$ 2,278,793
Accounts receivable, net				246,978		246,978		$ 236,086
Google Inc.
Revenue from major customers
Revenue				332,000	$ 351,400	979,800	$ 1,100,000
Accounts receivable, net				$ 112,200		$ 112,200		$ 118,700
PlentyOfFish
Revenue from major customers
Purchase price			$ 575,000
Match Group, Inc. \| Subsequent Event
Revenue from major customers
Percentage of subsidiary stock to be issued in IPO (less than)	20.00%
Match Group, Inc. \| Subsequent Event \| PlentyOfFish
Revenue from major customers
Purchase price		$ 575,000

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
INCOME TAXES (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax benefit (provision)	$ (40,510)	$ 59,816	$ (34,722)	$ 8,542
Effective tax rate (as a percent)	38.00%		19.00%
Federal statutory rate (as a percent)	35.00%		35.00%
Earnings from continuing operations before income taxes	$ 105,536	90,445	$ 179,496	158,029
Unrecognized tax benefits related to federal income taxes statute of limitations		$ 88,200		$ 88,200
Interest expense (benefit) on income tax benefit (provision)	(100)		200
Accrued interest on unrecognized tax benefits	2,200		2,200		$ 2,800
Accrued penalties on unrecognized tax benefits	2,100		2,100		2,900
Total unrecognized tax benefits including interest	24,800		24,800		$ 33,200
Unrecognized tax benefit, if recognized would reduce income tax expense for continuing operations	22,800		22,800
Change in unrecognized tax benefit	$ 7,700		$ 7,700

MARKETABLE SECURITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Corporate debt securities
Amortized Cost	$ 53,600	$ 159,418
Gross Unrealized Gains	7	34
Gross Unrealized Losses	(129)	(255)
Fair Value	53,478	159,197
Equity security
Amortized Cost	98	98
Gross Unrealized Gains	361	1,353
Gross Unrealized Losses	0	0
Fair Value	459	1,451
Total marketable securities
Amortized Cost	53,698	159,516
Gross Unrealized Gains	368	1,387
Gross Unrealized Losses	(129)	(255)
Fair Value	$ 53,937	$ 160,648

MARKETABLE SECURITIES (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Contractual maturities of debt securities classified as available-for-sale
Due in one year or less, amortized cost	$ 4,374
Due after one year through five years, amortized cost	49,226
Amortized Cost	53,600	$ 159,418
Due in one year or less, fair value	4,370
Due after one year through five years, fair value	49,108
Total, Estimated Fair Value	$ 53,478	$ 159,197

MARKETABLE SECURITIES (Details 3) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
MARKETABLE SECURITIES (Details 3) - USD ($) $ in Thousands	Jul. 14, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Proceeds from maturities and sales of current and non-current available-for-sale marketable securities and related gross realized gains and losses
Proceeds from maturities and sales of available-for-sale marketable securities		$ 178,315	$ 1,114	$ 192,928	$ 4,576
Gross realized gains		17	1,063	22	3,362
Impairment of available-for-sale marketable securities		804	$ 0	$ 1,304	$ 64,281
PlentyOfFish
Proceeds from maturities and sales of current and non-current available-for-sale marketable securities and related gross realized gains and losses
Purchase price	$ 575,000
Corporate debt securities
Proceeds from maturities and sales of current and non-current available-for-sale marketable securities and related gross realized gains and losses
Impairment of available-for-sale marketable securities		$ 300

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets:
Marketable securities	$ 53,937	$ 160,648
Fair value on a recurring basis
Assets:
Total Assets	497,639	780,563
Liabilities:
Contingent consideration arrangement	(31,470)	(30,140)
Fair value on a recurring basis \| Money market funds
Assets:
Cash equivalents:	375,094	174,720
Fair value on a recurring basis \| Time deposits
Assets:
Cash equivalents:	45,005	42,914
Fair value on a recurring basis \| Commercial paper
Assets:
Cash equivalents:	8,999	388,801
Fair value on a recurring basis \| Corporate debt securities
Assets:
Marketable securities	53,478	159,197
Fair value on a recurring basis \| Equity security
Assets:
Marketable securities	459	1,451
Long-term investments:	9,594	7,410
Fair value on a recurring basis \| Auction rate security
Assets:
Long-term investments:	5,010	6,070
Fair value on a recurring basis \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Total Assets	385,147	183,581
Fair value on a recurring basis \| Quoted Market Prices in Active Markets for Identical Assets (Level 1) \| Money market funds
Assets:
Cash equivalents:	375,094	174,720
Fair value on a recurring basis \| Quoted Market Prices in Active Markets for Identical Assets (Level 1) \| Equity security
Assets:
Marketable securities	459	1,451
Long-term investments:	9,594	7,410
Fair value on a recurring basis \| Significant Other Observable Inputs (Level 2)
Assets:
Total Assets	107,482	590,912
Fair value on a recurring basis \| Significant Other Observable Inputs (Level 2) \| Time deposits
Assets:
Cash equivalents:	45,005	42,914
Fair value on a recurring basis \| Significant Other Observable Inputs (Level 2) \| Commercial paper
Assets:
Cash equivalents:	8,999	388,801
Fair value on a recurring basis \| Significant Other Observable Inputs (Level 2) \| Corporate debt securities
Assets:
Marketable securities	53,478	159,197
Fair value on a recurring basis \| Significant Unobservable Inputs (Level 3)
Assets:
Total Assets	5,010	6,070
Liabilities:
Contingent consideration arrangement	(31,470)	(30,140)
Fair value on a recurring basis \| Significant Unobservable Inputs (Level 3) \| Auction rate security
Assets:
Long-term investments:	$ 5,010	$ 6,070

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details 1) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) arrangement	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) arrangement	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Auction rate securities
Cost basis	$ 53,600		$ 53,600		$ 159,418
Gross unrealized losses	$ 129		$ 129		255
Contingent Consideration Arrangements
Number of contingent consideration arrangements related to business acquisitions \| arrangement	9		9
Number of contingent consideration arrangements with payment limit \| arrangement	8		8
Contingent consideration, maximum amount at balance sheet date	$ 242,800		$ 242,800
Contingent consideration, fair value at balance sheet date with a maximum limit	$ 31,000		$ 31,000
Number of contingent consideration arrangements without payment limit \| arrangement	1		1
Contingent consideration, fair value at balance sheet date without a limit	$ 500		$ 500
Contingent consideration, at fair value, current	700		700
Contingent consideration, at fair value, noncurrent	30,800		30,800
Assets measured at fair value on a nonrecurring basis
Cost method investments	113,700		113,700		90,900
Cost method investments, other than temporary impairment		$ 64,200
Equity method investment, other than temporary impairment		4,200
Long-term marketable equity security
Cost basis	98		98		98
Gross unrealized gain	361		361		1,353
Gross unrealized loss	0		0		0
Auction rate security
Changes in assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at the beginning of the period, assets	6,630	9,250	6,070	$ 8,920
Total net gains (losses) included in other comprehensive income (loss), Asset	(1,620)	(670)	(1,060)	(340)
Balance at the end of the period, assets	5,010	8,580	5,010	8,580
Auction rate securities
Cost basis	10,000		10,000		10,000
Gross unrealized losses	5,000		5,000		3,900
Contingent Consideration Arrangement
Changes in liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at the beginning of the period	(31,858)	(41,397)	(30,140)	(45,828)
Total net gains (losses) included in earnings, fair value adjustments	960	14,281	17,906	13,781
Total net gains (losses) included in earnings, foreign currency exchange gains			626	0
Total net gains (losses) included in other comprehensive income (loss), Liability	(579)	1,918	1,538	2,054
Fair value at date of acquisition			(27,112)	(2,835)
Settlements	7	29	5,712	7,659
Balance at the end of the period	(31,470)	$ (25,169)	$ (31,470)	$ (25,169)
Contingent Consideration Arrangement \| Minimum
Contingent Consideration Arrangements
Contingent consideration, discount rates			12.00%
Contingent Consideration Arrangement \| Maximum
Contingent Consideration Arrangements
Contingent consideration, discount rates			25.00%
Equity security
Long-term marketable equity security
Cost basis	8,700		$ 8,700		8,700
Gross unrealized gain	$ 900		$ 900
Gross unrealized loss					$ 1,200

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net of current maturities	$ (1,000,000)	$ (1,080,000)
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net of current maturities	$ (990,050)	$ (1,099,813)

LONG-TERM DEBT (Details)		9 Months Ended
LONG-TERM DEBT (Details)	Oct. 07, 2015 USD ($)	Sep. 30, 2015 USD ($)	Oct. 16, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 21, 2012 USD ($)
Debt Instrument [Line Items]
Long-term debt		$ 1,000,000,000		$ 1,080,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity					$ 300,000,000
Line of credit, amount outstanding		$ 0		0
Annual fee to maintain the revolving facility		0.35%
Maximum leverage ratio		3.25
Senior Notes \| 4.875% Senior Notes due November 30, 2018
Debt Instrument [Line Items]
Long-term debt		$ 500,000,000		$ 500,000,000
Stated rate		4.875%		4.875%
Maximum leverage ratio		3.0
Senior Notes \| 4.75% Senior Notes Due December 2022
Debt Instrument [Line Items]
Long-term debt		$ 500,000,000		$ 500,000,000
Stated rate		4.75%		4.75%
Maximum leverage ratio		3.0
Senior Notes \| 4.75% Senior Notes Due December 2022 \| Subsequent Event
Debt Instrument [Line Items]
Cash tender offer			$ 443,500,000
Bonds \| 5% New York City Industrial Development Agency Bonds due September 2035
Debt Instrument [Line Items]
Long-term debt				$ 80,000,000
Stated rate				5.00%
Match Group, Inc. \| Revolving Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	$ 500,000,000
Annual fee to maintain the revolving facility	0.35%
Maximum leverage ratio	5.00
Minimum interest coverage ratio	2.50
Match Group, Inc. \| Senior Notes \| 6.75% Senior Notes Due 2022 \| Subsequent Event
Debt Instrument [Line Items]
Stated rate			6.75%
Cash tender offer			$ 443,500,000
Match Group, Inc. \| Senior Notes \| 6.75% Senior Notes Due 2022 \| Maximum \| Subsequent Event
Debt Instrument [Line Items]
Match exchange offer			$ 500,000,000

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (87,700)
Total other comprehensive loss, net of tax	$ (14,220)	$ (37,148)	(57,972)	$ (34,208)
Ending balance	(144,488)		(144,488)
Tax provision (benefit) of other comprehensive loss before reclassifications related to unrealized losses on available-for-sale securities	(100)	200	(300)	(500)
Tax provision (benefit) for amounts reclassified from accumulated other comprehensive loss	100	400	(100)	1,200
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(133,895)	(15,282)	(86,848)	(20,352)
Other comprehensive income before reclassifications, net of tax benefit (provision) related to unrealized gains on available-for-sale securities	(8,420)	(36,428)	(55,467)	(31,358)
Amounts reclassified related to unrealized losses on available for sale securities, net of tax provision	(2,191)	0	(2,191)	0
Total other comprehensive loss, net of tax	(10,611)	(36,428)	(57,658)	(31,358)
Ending balance	(144,506)	(51,710)	(144,506)	(51,710)
Unrealized Gains On Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	3,600	5,376	(852)	7,306
Other comprehensive income before reclassifications, net of tax benefit (provision) related to unrealized gains on available-for-sale securities	(3,501)	231	788	(439)
Amounts reclassified related to unrealized losses on available for sale securities, net of tax provision	(81)	(665)	82	(1,925)
Total other comprehensive loss, net of tax	(3,582)	(434)	870	(2,364)
Ending balance	18	4,942	18	4,942
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(130,295)	(9,906)	(87,700)	(13,046)
Other comprehensive income before reclassifications, net of tax benefit (provision) related to unrealized gains on available-for-sale securities	(11,921)	(36,197)	(54,679)	(31,797)
Amounts reclassified related to unrealized losses on available for sale securities, net of tax provision	(2,272)	(665)	(2,109)	(1,925)
Total other comprehensive loss, net of tax	(14,193)	(36,862)	(56,788)	(33,722)
Ending balance	$ (144,488)	$ (46,768)	$ (144,488)	$ (46,768)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator: Basic
Earnings from continuing operations	$ 65,026	$ 150,261	$ 144,774	$ 166,571
Net loss attributable to noncontrolling interests	568	821	6,558	4,082
Earnings from continuing operations attributable to IAC shareholders	65,594	151,082	151,332	170,653
Earnings (loss) from discontinued operations, net of tax	17	175,730	(11)	174,048
Net earnings (loss) attributable to IAC shareholders	65,611	326,812	151,321	344,701
Numerator: Diluted
Earnings from continuing operations	65,026	150,261	144,774	166,571
Net loss attributable to noncontrolling interests	568	821	6,558	4,082
Earnings from continuing operations attributable to IAC shareholders	65,594	151,082	151,332	170,653
Earnings (loss) from discontinued operations, net of tax	17	175,730	(11)	174,048
Net earnings (loss) attributable to IAC shareholders	$ 65,611	$ 326,812	$ 151,321	$ 344,701
Denominator: Basic
Weighted average basic shares outstanding	82,910	83,591	82,924	83,088
Denominator: Diluted
Weighted average basic shares outstanding	82,910	83,591	82,924	83,088
Dilutive securities including stock options and RSUs (in shares)	5,990	5,199	5,323	5,167
Denominator for earnings per share-weighted average shares (in shares)	88,900	88,790	88,247	88,255
Earnings (loss) per share attributable to IAC shareholders: Basic
Earnings per share from continuing operations (in dollars per share)	$ 0.79	$ 1.81	$ 1.82	$ 2.05
Discontinued operations (in dollars per share)	0.00	2.10	0.00	2.10
Earnings per share (in dollars per share)	0.79	3.91	1.82	4.15
Earnings (loss) per share attributable to IAC shareholders: Diluted
Earnings per share from continuing operations (in dollars per share)	0.74	1.70	1.71	1.93
Discontinued operations (in dollars per share)	0.00	1.98	0.00	1.98
Earnings per share (in dollars per share)	$ 0.74	$ 3.68	$ 1.71	$ 3.91

EARNINGS PER SHARE (Details 2) - shares shares in Millions	3 Months Ended		9 Months Ended
EARNINGS PER SHARE (Details 2) - shares shares in Millions	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
RSUs
Anti-dilutive weighted average common shares
Potentially dilutive securities excluded from calculation of diluted earnings per share (in shares)	1.0	0.3	1.3	0.3
PSUs
Anti-dilutive weighted average common shares
Potentially dilutive securities excluded from calculation of diluted earnings per share (in shares)	0.2	0.1	0.2	0.1

SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment reporting information
Revenue	$ 838,561	$ 782,231	$ 2,382,205	$ 2,278,793
Operating income	87,130	100,953	185,018	268,355
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	141,142	134,588	324,978	384,115
Stock-Based Compensation Expense	(27,009)	(17,332)	(71,869)	(43,497)
Depreciation	(15,625)	(14,133)	(46,693)	(44,208)
Amortization of Intangibles	(12,338)	(16,451)	(39,304)	(41,836)
Acquisition-related contingent consideration fair value adjustments	960	14,281	17,906	13,781
Operating income	87,130	100,953	185,018	268,355
Operating segments \| Search & Applications
Segment reporting information
Revenue	377,142	394,659	1,111,406	1,188,410
Operating income	65,391	80,384	198,283	228,492
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	74,391	93,127	226,202	266,456
Stock-Based Compensation Expense	0	0	0	0
Depreciation	(3,777)	(3,596)	(11,078)	(13,143)
Amortization of Intangibles	(6,736)	(9,147)	(20,631)	(24,821)
Acquisition-related contingent consideration fair value adjustments	1,513	0	3,790	0
Operating income	65,391	80,384	198,283	228,492
Operating segments \| The Match Group
Segment reporting information
Revenue	274,231	230,198	768,132	655,699
Operating income	71,912	66,393	148,665	167,394
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	84,339	61,371	175,017	178,169
Stock-Based Compensation Expense	(1,147)	(145)	(3,816)	(332)
Depreciation	(6,173)	(5,794)	(19,885)	(17,183)
Amortization of Intangibles	(4,352)	(3,320)	(14,130)	(6,841)
Acquisition-related contingent consideration fair value adjustments	(755)	14,281	11,479	13,581
Operating income	71,912	66,393	148,665	167,394
Operating segments \| Media
Segment reporting information
Revenue	57,278	49,895	137,100	122,906
Operating income	(8,252)	(8,723)	(37,379)	(27,083)
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	(7,746)	(7,702)	(37,781)	(24,477)
Stock-Based Compensation Expense	(50)	(161)	(344)	(486)
Depreciation	(280)	(225)	(712)	(731)
Amortization of Intangibles	(378)	(635)	(1,179)	(1,589)
Acquisition-related contingent consideration fair value adjustments	202	0	2,637	200
Operating income	(8,252)	(8,723)	(37,379)	(27,083)
Operating segments \| eCommerce
Segment reporting information
Revenue	130,031	107,825	366,027	312,616
Operating income	4,243	(1,585)	(3,615)	(3,138)
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	7,713	3,865	7,257	11,192
Stock-Based Compensation Expense	(410)	(138)	(1,250)	(138)
Depreciation	(2,188)	(1,963)	(6,258)	(5,607)
Amortization of Intangibles	(872)	(3,349)	(3,364)	(8,585)
Acquisition-related contingent consideration fair value adjustments	0	0	0	0
Operating income	4,243	(1,585)	(3,615)	(3,138)
Intersegment eliminations
Segment reporting information
Revenue	(121)	(346)	(460)	(838)
Corporate
Segment reporting information
Operating income	(46,164)	(35,516)	(120,936)	(97,310)
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	(17,555)	(16,073)	(45,717)	(47,225)
Stock-Based Compensation Expense	(25,402)	(16,888)	(66,459)	(42,541)
Depreciation	(3,207)	(2,555)	(8,760)	(7,544)
Amortization of Intangibles	0	0	0	0
Acquisition-related contingent consideration fair value adjustments	0	0	0	0
Operating income	$ (46,164)	$ (35,516)	$ (120,936)	$ (97,310)

SEGMENT INFORMATION (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
SEGMENT INFORMATION (Details 2) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Revenue and long-lived assets by geography
Revenue	$ 838,561	$ 782,231	$ 2,382,205	$ 2,278,793
Long-lived assets (excluding goodwill and intangible assets)	299,078		299,078		$ 302,459
Reportable Geographical Components \| United States
Revenue and long-lived assets by geography
Revenue	619,297	544,486	1,755,534	1,560,751
Long-lived assets (excluding goodwill and intangible assets)	278,970		278,970		281,879
Reportable Geographical Components \| All Other Countries
Revenue and long-lived assets by geography
Revenue	219,264	$ 237,745	626,671	$ 718,042
Long-lived assets (excluding goodwill and intangible assets)	$ 20,108		$ 20,108		$ 20,580

CONSOLIDATED FINANCIAL STATEMENT DETAILS CONSOLIDATED FINANCIAL STATEMENT DETAILS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Gain on real estate transaction	$ 33,586	$ 0	$ 33,586	$ 0
Impairment of long-term investments	(804)	0	(1,304)	(64,281)
Foreign currency exchange gains (losses)	308	2,210	4,838	(612)
Other	910	1,903	2,706	6,083
Total	$ 34,000	$ 4,113	$ 39,826	$ (58,810)

CONTINGENCIES (Details)	9 Months Ended
CONTINGENCIES (Details)	Sep. 30, 2015 lawsuit
Loss Contingency [Abstract]
Minimum number of lawsuits that could have material impact on the liquidity, results of operations, or financial condition	1

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 766,448	$ 990,405	$ 931,712	$ 1,100,444
Marketable securities	53,937	160,648
Accounts receivable, net	246,978	236,086
Other current assets	178,883	166,742
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	299,078	302,459
Goodwill	1,769,141	1,754,926
Intangible assets, net	459,921	491,936
Other non-current assets	114,107	56,693
TOTAL ASSETS	4,027,318	4,274,878
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	68,448	81,163
Long-term debt	1,000,000	1,080,000
Income taxes payable	23,641	32,635
Other long-term liabilities	62,476	45,191
Redeemable noncontrolling interests	25,227	40,427
IAC shareholders' equity	1,845,191	1,991,953
Noncontrolling interests	0	1,189
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,027,318	4,274,878
Intersegment eliminations
ASSETS
Cash and cash equivalents	0	0
Marketable securities	0	0
Accounts receivable, net	0	0
Other current assets	(3,735)	(5,773)
Intercompany receivables	(2,337,822)	(2,659,213)
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	(5,991,454)	(5,965,747)
Other non-current assets	(8,060)	(2,988)
TOTAL ASSETS	(8,341,071)	(8,633,721)
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	0	0
Other current liabilities	14	(817)
Long-term debt	0	0
Income taxes payable	0	0
Intercompany liabilities	(2,337,822)	(2,659,213)
Other long-term liabilities	(11,809)	(7,944)
Redeemable noncontrolling interests	0	0
IAC shareholders' equity	(5,991,454)	(5,965,747)
Noncontrolling interests		0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	(8,341,071)	(8,633,721)
IAC Consolidated
ASSETS
Cash and cash equivalents	766,448	990,405	931,712	1,100,444
Marketable securities	53,937	160,648
Accounts receivable, net	246,978	236,086
Other current assets	178,883	166,742
Intercompany receivables	0	0
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	299,078	302,459
Goodwill	1,769,141	1,754,926
Intangible assets, net	459,921	491,936
Investment in subsidiaries	0	0
Other non-current assets	252,932	171,676
TOTAL ASSETS	4,027,318	4,274,878
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	68,448	81,163
Other current liabilities	585,009	592,791
Long-term debt	1,000,000	1,080,000
Income taxes payable	23,641	32,635
Intercompany liabilities	0	0
Other long-term liabilities	479,802	454,720
Redeemable noncontrolling interests	25,227	40,427
IAC shareholders' equity	1,845,191	1,991,953
Noncontrolling interests		1,189
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,027,318	4,274,878
IAC
ASSETS
Cash and cash equivalents	360,009	766,076	679,711	782,022
Marketable securities	53,477	159,197
Accounts receivable, net	9	13
Other current assets	7,261	23,923
Intercompany receivables	0	0
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	4,574	4,950
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	5,033,588	5,035,304
Other non-current assets	92,132	44,610
TOTAL ASSETS	5,551,050	6,034,073
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	2,865	3,059
Other current liabilities	54,163	73,491
Long-term debt	1,000,000	1,000,000
Income taxes payable	858	2,240
Intercompany liabilities	2,337,822	2,659,213
Other long-term liabilities	310,151	304,117
Redeemable noncontrolling interests	0	0
IAC shareholders' equity	1,845,191	1,991,953
Noncontrolling interests		0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	5,551,050	6,034,073
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	0	1,021	4,273	0
Marketable securities	0	0
Accounts receivable, net	147,175	155,262
Other current assets	93,121	91,105
Intercompany receivables	1,557,881	1,688,403
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	228,159	232,819
Goodwill	1,247,038	1,249,807
Intangible assets, net	307,079	325,771
Investment in subsidiaries	957,866	930,443
Other non-current assets	28,897	20,682
TOTAL ASSETS	4,567,216	4,695,313
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	34,991	55,320
Other current liabilities	326,379	328,920
Long-term debt	0	80,000
Income taxes payable	4,531	4,771
Intercompany liabilities	0	0
Other long-term liabilities	105,074	104,219
Redeemable noncontrolling interests	0	0
IAC shareholders' equity	4,096,241	4,122,083
Noncontrolling interests		0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,567,216	4,695,313
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	406,439	223,308	$ 247,728	$ 318,422
Marketable securities	460	1,451
Accounts receivable, net	99,794	80,811
Other current assets	82,236	57,487
Intercompany receivables	779,941	970,810
Property and equipment, net of accumulated depreciation and amortization of $305,226 and $279,534, respectively	66,345	64,690
Goodwill	522,103	505,119
Intangible assets, net	152,842	166,165
Investment in subsidiaries	0	0
Other non-current assets	139,963	109,372
TOTAL ASSETS	2,250,123	2,179,213
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	30,592	22,784
Other current liabilities	204,453	191,197
Long-term debt	0	0
Income taxes payable	18,252	25,624
Intercompany liabilities	0	0
Other long-term liabilities	76,386	54,328
Redeemable noncontrolling interests	25,227	40,427
IAC shareholders' equity	1,895,213	1,843,664
Noncontrolling interests		1,189
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 2,250,123	$ 2,179,213

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 838,561	$ 782,231	$ 2,382,205	$ 2,278,793
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	205,261	224,695	580,090	644,659
Selling and marketing expense	337,226	278,321	1,014,289	849,410
General and administrative expense	134,122	106,987	378,265	311,973
Product development expense	46,859	40,691	138,546	118,352
Depreciation	15,625	14,133	46,693	44,208
Amortization of intangibles	12,338	16,451	39,304	41,836
Total operating costs and expenses	751,431	681,278	2,197,187	2,010,438
Operating income	87,130	100,953	185,018	268,355
Equity in earnings of unconsolidated affiliates	398	(612)	(78)	(9,397)
Interest expense	(15,992)	(14,009)	(45,270)	(42,119)
Other (expense) income, net	34,000	4,113	39,826	(58,810)
Earnings from continuing operations before income taxes	105,536	90,445	179,496	158,029
Income tax benefit (provision)	(40,510)	59,816	(34,722)	8,542
Earnings from continuing operations	65,026	150,261	144,774	166,571
Earnings (loss) from discontinued operations, net of tax	17	175,730	(11)	174,048
Net earnings	65,043	325,991	144,763	340,619
Net loss attributable to noncontrolling interests	568	821	6,558	4,082
Net earnings (loss) attributable to IAC shareholders	65,611	326,812	151,321	344,701
Comprehensive income (loss) attributable to IAC shareholders	51,418	289,950	94,533	310,979
Total Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue	(3,060)	(3,002)	(9,104)	(9,332)
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	(260)	(688)	(650)	(2,335)
Selling and marketing expense	(2,801)	(2,273)	(8,420)	(6,410)
General and administrative expense	1	10	(34)	36
Product development expense	0	(51)	0	(623)
Depreciation	0	0	0	0
Amortization of intangibles	0	0	0	0
Total operating costs and expenses	(3,060)	(3,002)	(9,104)	(9,332)
Operating income	0	0	0	0
Equity in earnings of unconsolidated affiliates	(116,159)	(107,162)	(257,855)	(178,725)
Interest expense	0	0	0	0
Other (expense) income, net	0	0	0	0
Earnings from continuing operations before income taxes	(116,159)	(107,162)	(257,855)	(178,725)
Income tax benefit (provision)	0	0	0	0
Earnings from continuing operations	(116,159)	(107,162)	(257,855)	(178,725)
Earnings (loss) from discontinued operations, net of tax	1	(5)	(2)	35
Net earnings	(116,158)	(107,167)	(257,857)	(178,690)
Net loss attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to IAC shareholders	(116,158)	(107,167)	(257,857)	(178,690)
Comprehensive income (loss) attributable to IAC shareholders	(107,092)	(67,084)	(196,618)	(139,410)
IAC Consolidated
Condensed Financial Statements, Captions [Line Items]
Revenue	838,561	782,231	2,382,205	2,278,793
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	205,261	224,695	580,090	644,659
Selling and marketing expense	337,226	278,321	1,014,289	849,410
General and administrative expense	134,122	106,987	378,265	311,973
Product development expense	46,859	40,691	138,546	118,352
Depreciation	15,625	14,133	46,693	44,208
Amortization of intangibles	12,338	16,451	39,304	41,836
Total operating costs and expenses	751,431	681,278	2,197,187	2,010,438
Operating income	87,130	100,953	185,018	268,355
Equity in earnings of unconsolidated affiliates	398	(612)	(78)	(9,397)
Interest expense	(15,992)	(14,009)	(45,270)	(42,119)
Other (expense) income, net	34,000	4,113	39,826	(58,810)
Earnings from continuing operations before income taxes	105,536	90,445	179,496	158,029
Income tax benefit (provision)	(40,510)	59,816	(34,722)	8,542
Earnings from continuing operations	65,026	150,261	144,774	166,571
Earnings (loss) from discontinued operations, net of tax	17	175,730	(11)	174,048
Net earnings	65,043	325,991	144,763	340,619
Net loss attributable to noncontrolling interests	568	821	6,558	4,082
Net earnings (loss) attributable to IAC shareholders	65,611	326,812	151,321	344,701
Comprehensive income (loss) attributable to IAC shareholders	51,418	289,950	94,533	310,979
IAC
Condensed Financial Statements, Captions [Line Items]
Revenue	0	0	0	0
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	307	387	846	742
Selling and marketing expense	1,250	723	3,315	1,534
General and administrative expense	37,186	28,046	95,192	77,101
Product development expense	2,408	1,935	6,915	5,111
Depreciation	613	402	1,440	1,043
Amortization of intangibles	0	0	0	0
Total operating costs and expenses	41,764	31,493	107,708	85,531
Operating income	(41,764)	(31,493)	(107,708)	(85,531)
Equity in earnings of unconsolidated affiliates	96,076	89,209	220,971	148,604
Interest expense	(12,995)	(12,948)	(38,977)	(38,918)
Other (expense) income, net	24,678	(8,311)	7,571	11,077
Earnings from continuing operations before income taxes	65,995	36,457	81,857	35,232
Income tax benefit (provision)	(401)	114,625	69,475	135,421
Earnings from continuing operations	65,594	151,082	151,332	170,653
Earnings (loss) from discontinued operations, net of tax	17	175,730	(11)	174,048
Net earnings	65,611	326,812	151,321	344,701
Net loss attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to IAC shareholders	65,611	326,812	151,321	344,701
Comprehensive income (loss) attributable to IAC shareholders	51,418	289,950	94,533	310,979
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	606,269	570,101	1,787,137	1,672,589
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	117,292	128,968	354,416	384,431
Selling and marketing expense	276,036	220,780	829,308	677,273
General and administrative expense	70,225	56,955	202,314	151,089
Product development expense	31,945	28,131	94,075	81,532
Depreciation	10,799	9,434	33,489	28,219
Amortization of intangibles	6,246	10,784	18,742	29,444
Total operating costs and expenses	512,543	455,052	1,532,344	1,351,988
Operating income	93,726	115,049	254,793	320,601
Equity in earnings of unconsolidated affiliates	19,940	17,246	36,312	20,593
Interest expense	(2,963)	(1,050)	(6,220)	(3,144)
Other (expense) income, net	2,911	8,771	32,767	(9,935)
Earnings from continuing operations before income taxes	113,614	140,016	317,652	328,115
Income tax benefit (provision)	(35,131)	(46,133)	(107,397)	(115,862)
Earnings from continuing operations	78,483	93,883	210,255	212,253
Earnings (loss) from discontinued operations, net of tax	0	0	0	0
Net earnings	78,483	93,883	210,255	212,253
Net loss attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to IAC shareholders	78,483	93,883	210,255	212,253
Comprehensive income (loss) attributable to IAC shareholders	80,157	90,988	207,445	209,078
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	235,352	215,132	604,172	615,536
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	87,922	96,028	225,478	261,821
Selling and marketing expense	62,741	59,091	190,086	177,013
General and administrative expense	26,710	21,976	80,793	83,747
Product development expense	12,506	10,676	37,556	32,332
Depreciation	4,213	4,297	11,764	14,946
Amortization of intangibles	6,092	5,667	20,562	12,392
Total operating costs and expenses	200,184	197,735	566,239	582,251
Operating income	35,168	17,397	37,933	33,285
Equity in earnings of unconsolidated affiliates	541	95	494	131
Interest expense	(34)	(11)	(73)	(57)
Other (expense) income, net	6,411	3,653	(512)	(59,952)
Earnings from continuing operations before income taxes	42,086	21,134	37,842	(26,593)
Income tax benefit (provision)	(4,978)	(8,676)	3,200	(11,017)
Earnings from continuing operations	37,108	12,458	41,042	(37,610)
Earnings (loss) from discontinued operations, net of tax	(1)	5	2	(35)
Net earnings	37,107	12,463	41,044	(37,645)
Net loss attributable to noncontrolling interests	568	821	6,558	4,082
Net earnings (loss) attributable to IAC shareholders	37,675	13,284	47,602	(33,563)
Comprehensive income (loss) attributable to IAC shareholders	$ 26,935	$ (23,904)	$ (10,827)	$ (69,668)

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details3) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities attributable to continuing operations	$ 184,107	$ 294,661
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	(43,286)	(244,196)
Capital expenditures	(44,558)	(39,033)
Proceeds from maturities and sales of marketable debt securities	192,928	998
Purchases of marketable debt securities	(93,134)	(110,886)
Purchases of long-term investments	(25,073)	(17,703)
Other, net	4,456	11,924
Net cash used in investing activities attributable to continuing operations	(8,667)	(398,896)
Cash flows from financing activities attributable to continuing operations:
Purchase of treasury stock	(200,000)	0
Dividends	(84,947)	(68,505)
Principal payment on long-term debt	(80,000)	0
Issuance of common stock, net of withholding taxes	(40,197)	(4,823)
Excess tax benefits from stock-based awards	49,147	41,320
Purchase of noncontrolling interests	(29,899)	(30,328)
Funds returned from escrow for Meetic tender offer	0	12,354
Acquisition-related contingent consideration payments	(5,712)	(7,659)
Other, net	512	(1,397)
Net cash used in financing activities attributable to continuing operations	(391,096)	(59,038)
Total cash used in continuing operations	(215,656)	(163,273)
Total cash used in discontinued operations	(190)	(171)
Effect of exchange rate changes on cash and cash equivalents	(8,111)	(5,288)
Net decrease in cash and cash equivalents	(223,957)	(168,732)
Cash and cash equivalents at beginning of period	990,405	1,100,444
Cash and cash equivalents at end of period	766,448	931,712
IAC Consolidated
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities attributable to continuing operations	184,107	294,661
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	(43,286)	(244,196)
Capital expenditures	(44,558)	(39,033)
Proceeds from maturities and sales of marketable debt securities	192,928	998
Purchases of marketable debt securities	(93,134)	(110,886)
Purchases of long-term investments	(25,073)	(17,703)
Other, net	4,456	11,924
Net cash used in investing activities attributable to continuing operations	(8,667)	(398,896)
Cash flows from financing activities attributable to continuing operations:
Purchase of treasury stock	(200,000)
Dividends	(84,947)	(68,505)
Principal payment on long-term debt	(80,000)
Issuance of common stock, net of withholding taxes	(40,197)	(4,823)
Excess tax benefits from stock-based awards	49,147	41,320
Purchase of noncontrolling interests	(29,899)	(30,328)
Funds returned from escrow for Meetic tender offer		12,354
Acquisition-related contingent consideration payments	(5,712)	(7,659)
Intercompany	0	0
Other, net	512	(1,397)
Net cash used in financing activities attributable to continuing operations	(391,096)	(59,038)
Total cash used in continuing operations	(215,656)	(163,273)
Total cash used in discontinued operations	(190)	(171)
Effect of exchange rate changes on cash and cash equivalents	(8,111)	(5,288)
Net decrease in cash and cash equivalents	(223,957)	(168,732)
Cash and cash equivalents at beginning of period	990,405	1,100,444
Cash and cash equivalents at end of period	766,448	931,712
IAC
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities attributable to continuing operations	(145,714)	(50,458)
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	0	0
Capital expenditures	(1,051)	(2,375)
Proceeds from maturities and sales of marketable debt securities	192,928	998
Purchases of marketable debt securities	(93,134)	(110,886)
Purchases of long-term investments	0	(3,000)
Other, net	4,890	0
Net cash used in investing activities attributable to continuing operations	103,633	(115,263)
Cash flows from financing activities attributable to continuing operations:
Purchase of treasury stock	(200,000)
Dividends	(84,947)	(68,505)
Principal payment on long-term debt	0
Issuance of common stock, net of withholding taxes	(40,197)	(4,823)
Excess tax benefits from stock-based awards	49,016	31,041
Purchase of noncontrolling interests	0	0
Acquisition-related contingent consideration payments	0	0
Intercompany	(87,832)	106,215
Other, net	166	(382)
Net cash used in financing activities attributable to continuing operations	(363,794)	63,546
Total cash used in continuing operations	(405,875)	(102,175)
Total cash used in discontinued operations	(192)	(136)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net decrease in cash and cash equivalents	(406,067)	(102,311)
Cash and cash equivalents at beginning of period	766,076	782,022
Cash and cash equivalents at end of period	360,009	679,711
Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities attributable to continuing operations	310,471	350,889
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	(3,675)	(191,223)
Capital expenditures	(30,647)	(25,866)
Proceeds from maturities and sales of marketable debt securities	0	0
Purchases of marketable debt securities	0	0
Purchases of long-term investments	0	(7,043)
Other, net	(1,097)	10
Net cash used in investing activities attributable to continuing operations	(35,419)	(224,122)
Cash flows from financing activities attributable to continuing operations:
Principal payment on long-term debt	(80,000)
Purchase of noncontrolling interests	0	(30,000)
Acquisition-related contingent consideration payments	(202)	(286)
Intercompany	(195,884)	(90,996)
Other, net		(1,343)
Net cash used in financing activities attributable to continuing operations	(276,086)	(122,625)
Total cash used in continuing operations	(1,034)	4,142
Total cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	13	131
Net decrease in cash and cash equivalents	(1,021)	4,273
Cash and cash equivalents at beginning of period	1,021	0
Cash and cash equivalents at end of period	0	4,273
Non-Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities attributable to continuing operations	19,350	(5,770)
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	(39,611)	(52,973)
Capital expenditures	(12,860)	(10,792)
Proceeds from maturities and sales of marketable debt securities	0	0
Purchases of marketable debt securities	0	0
Purchases of long-term investments	(25,073)	(7,660)
Other, net	663	11,914
Net cash used in investing activities attributable to continuing operations	(76,881)	(59,511)
Cash flows from financing activities attributable to continuing operations:
Principal payment on long-term debt	0
Excess tax benefits from stock-based awards	131	10,279
Purchase of noncontrolling interests	(29,899)	(328)
Funds returned from escrow for Meetic tender offer		12,354
Acquisition-related contingent consideration payments	(5,510)	(7,373)
Intercompany	283,716	(15,219)
Other, net	346	328
Net cash used in financing activities attributable to continuing operations	248,784	41
Total cash used in continuing operations	191,253	(65,240)
Total cash used in discontinued operations	2	(35)
Effect of exchange rate changes on cash and cash equivalents	(8,124)	(5,419)
Net decrease in cash and cash equivalents	183,131	(70,694)
Cash and cash equivalents at beginning of period	223,308	318,422
Cash and cash equivalents at end of period	$ 406,439	$ 247,728