Match (MTCH) 10-Q 2 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 25, 2014	Apr. 25, 2014
		Common Stock	Class B Convertible Common Stock
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	31-Mar-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q1	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	77,250,103	5,789,499

CONSOLIDATED_BALANCE_SHEET

CONSOLIDATED BALANCE SHEET (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$1,003,311	$1,100,444
Marketable securities	39,543	6,004
Accounts receivable, net of allowance of $9,523 and $8,540 respectively	241,017	207,408
Other current assets	187,205	161,530
Total current assets	1,471,076	1,475,386
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	291,111	293,964
Goodwill	1,715,601	1,675,323
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	472,237	445,336
Long-term investments	184,282	179,990
Other non-current assets	89,749	164,685
TOTAL ASSETS	4,224,056	4,234,684
LIABILITIES:	'	'
Accounts payable, trade	67,516	77,653
Deferred revenue	175,897	158,206
Accrued expenses and other current liabilities	357,230	351,038
Total current liabilities	600,643	586,897
Long-term debt	1,080,000	1,080,000
Income taxes payable	420,256	416,384
Deferred income taxes	324,342	320,748
Other long-term liabilities	61,706	58,393
Redeemable noncontrolling interests	25,885	42,861
Commitments and contingencies	'	'
SHAREHOLDERS' EQUITY:	'	'
Additional paid-in capital	11,375,124	11,562,567
Retained earnings (accumulated deficit)	3,150	-32,735
Accumulated other comprehensive loss	-7,697	-13,046
Treasury stock 184,182,001 and 184,945,527 shares, respectively	-9,661,350	-9,830,317
Total IAC shareholders' equity	1,709,494	1,686,736
Noncontrolling interests	1,730	42,665
Total shareholders' equity	1,711,224	1,729,401
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,224,056	4,234,684
Common Stock	'	'
SHAREHOLDERS' EQUITY:	'	'
Common stock	251	251
Class B Convertible Common Stock	'	'
SHAREHOLDERS' EQUITY:	'	'
Common stock	$16	$16

CONSOLIDATED_BALANCE_SHEET_Par

CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Accounts receivable, allowance (in dollars)	$9,523	$8,540
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (in dollars)	$277,498	$265,298
Treasury stock, shares	184,182,001	184,945,527
Common Stock	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, authorized shares	1,600,000,000	1,600,000,000
Common stock, issued shares	250,982,079	250,982,079
Common stock, outstanding shares	77,168,078	76,404,552
Class B Convertible Common Stock	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
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_OPER

CONSOLIDATED STATEMENT OF OPERATIONS (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Revenue	$740,247	$742,249
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	209,194	255,849
Selling and marketing expense	298,712	242,914
General and administrative expense	94,816	95,724
Product development expense	39,016	35,117
Depreciation	14,818	14,016
Amortization of intangibles	11,979	14,078
Total operating costs and expenses	668,535	657,698
Operating income	71,712	84,551
Equity in losses of unconsolidated affiliates	-1,935	-91
Interest expense	-14,064	-7,663
Other (expense) income, net	-23	1,658
Earnings from continuing operations before income taxes	55,690	78,455
Income tax provision	-21,385	-25,746
Earnings from continuing operations	34,305	52,709
Loss from discontinued operations, net of tax	-814	-944
Net earnings	33,491	51,765
Net loss attributable to noncontrolling interests	2,394	1,872
Net earnings attributable to IAC shareholders	35,885	53,637
Per share information attributable to IAC shareholders:	'	'
Basic earnings per share from continuing operations (in dollars per share)	$0.44	$0.65
Diluted earnings per share from continuing operations (in dollars per share)	$0.42	$0.62
Basic earnings per share (in dollars per share)	$0.44	$0.64
Diluted earnings per share (in dollars per share)	$0.41	$0.61
Dividends declared per share (in dollars per share)	$0.24	$0.24
Non-cash compensation expense by function:	'	'
Total non-cash compensation expense	9,613	12,663
Cost of revenue	'	'
Non-cash compensation expense by function:	'	'
Total non-cash compensation expense	-8	620
Selling and marketing expense	'	'
Non-cash compensation expense by function:	'	'
Total non-cash compensation expense	196	386
General and administrative expense	'	'
Non-cash compensation expense by function:	'	'
Total non-cash compensation expense	7,952	10,780
Product development expense	'	'
Non-cash compensation expense by function:	'	'
Total non-cash compensation expense	$1,473	$877

CONSOLIDATED_STATEMENT_OF_COMP

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net earnings	$33,491	$51,765
Other comprehensive income (loss), net of tax:	'	'
Change in foreign currency translation adjustment	5,377	-8,423
Change in net unrealized losses on available-for-sale securities (net of tax benefits of $573 in 2014 and $824 in 2013)	-111	-4,976
Net current period other comprehensive income	5,266	-13,399
Comprehensive income	38,757	38,366
Comprehensive loss attributable to noncontrolling interests	2,477	3,344
Comprehensive income attributable to IAC shareholders	$41,234	$41,710

CONSOLIDATED_STATEMENT_OF_COMP1

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Change in net unrealized gains on available-for-sale securities, tax	$573	$824

CONSOLIDATED_STATEMENT_OF_SHAR

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $)	Total	IAC	Common Stock	Common Stock	Additional Paid-in Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests	Redeemable Noncontrolling Interests
In Thousands, unless otherwise specified				Class B Convertible Common Stock
Redeemable noncontrolling interests, balance at Dec. 31, 2013	$42,861	'	'	'	'	'	'	'	'	$42,861
Balance at Dec. 31, 2013	1,729,401	1,686,736	251	16	11,562,567	-32,735	-13,046	-9,830,317	42,665	'
Balance (in shares) at Dec. 31, 2013	'	'	250,982	16,157	'	'	'	'	'	'
Increase (Decrease) in Shareholders' Equity	'	'	'	'	'	'	'	'	'	'
Net (loss) earnings for the three months ended March 31, 2014	35,885	35,885	'	'	'	35,885	'	'	0	'
Redeemable noncontrolling interests, net loss for the three months ended March 31, 2014	'	'	'	'	'	'	'	'	'	-2,394
Other comprehensive (loss) income, net of tax	5,448	5,349	'	'	'	'	5,349	'	99	'
Non-cash compensation expense	9,613	9,596	'	'	9,596	'	'	'	17	'
Redeemable noncontrolling interests, other comprehensive loss, net of tax	'	'	'	'	'	'	'	'	'	-182
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other, net of withholding taxes	1,035	1,035	'	'	-167,932	'	'	168,967	'	'
Income tax benefit related to the exercise of stock options, vesting of restricted stock units and other	24,145	24,145	'	'	24,145	'	'	'	'	'
Dividends	-19,494	-19,494	'	'	-19,494	'	'	'	'	'
Purchase of redeemable noncontrolling interests	-50,347	'	'	'	'	'	'	'	-50,347	-38,893
Adjustment of redeemable noncontrolling interests and noncontrolling interests to fair value	-24,462	-33,758	'	'	-33,758	'	'	'	9,296	24,462
Redeemable noncontrolling interests, other	'	'	'	'	'	'	'	'	'	31
Redeemable noncontrolling interests, balance at Mar. 31, 2014	25,885	'	'	'	'	'	'	'	'	25,885
Balance at Mar. 31, 2014	$1,711,224	$1,709,494	$251	$16	$11,375,124	$3,150	($7,697)	($9,661,350)	$1,730	'
Balance (in shares) at Mar. 31, 2014	'	'	250,982	16,157	'	'	'	'	'	'

CONSOLIDATED_STATEMENT_OF_CASH

CONSOLIDATED STATEMENT OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities attributable to continuing operations:	'	'
Net earnings	$33,491	$51,765
Less: loss from discontinued operations, net of tax	-814	-944
Earnings from continuing operations	34,305	52,709
Adjustments to reconcile earnings from continuing operations to net cash provided by operating activities attributable to continuing operations:	'	'
Non-cash compensation expense	9,613	12,663
Depreciation	14,818	14,016
Amortization of intangibles	11,979	14,078
Excess Tax Benefit from Share-based Compensation, Operating Activities	-24,203	-12,530
Deferred income taxes	3,799	-11,010
Equity in losses of unconsolidated affiliates	1,935	91
Acquisition-related contingent consideration fair value adjustments	-27	1,458
Changes in assets and liabilities, net of effects of acquisitions:	'	'
Accounts receivable	-20,387	-4,635
Other assets	-4,100	-8,001
Accounts payable and other current liabilities	-11,655	-12,929
Income taxes payable	6,697	35,196
Deferred revenue	16,917	7,827
Other, net	3,013	3,429
Net cash provided by operating activities attributable to continuing operations	42,704	92,362
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	-77,981	-29,194
Capital expenditures	-9,721	-33,638
Proceeds from maturities and sales of marketable debt securities	0	12,500
Purchases of marketable debt securities	-32,848	0
Purchases of long-term investments	-7,861	-975
Other, net	-157	-837
Net cash used in investing activities attributable to continuing operations	-128,568	-52,144
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	0	-88,605
Issuance of common stock, net of withholding taxes	920	552
Dividends	-20,004	-21,429
Excess tax benefits from stock-based awards	24,203	12,530
Payments to Noncontrolling Interests	-30,000	0
Funds returned from escrow for Meetic tender offer	12,354	0
Principal payments on long-term debt	0	-15,844
Other, net	-295	-1,101
Net cash used in financing activities attributable to continuing operations	-12,822	-113,897
Total cash used in continuing operations	-98,686	-73,679
Total cash (used in) provided by discontinued operations	-63	2,425
Effect of exchange rate changes on cash and cash equivalents	1,616	-4,966
Net decrease in cash and cash equivalents	-97,133	-76,220
Cash and cash equivalents at beginning of period	1,100,444	749,977
Cash and cash equivalents at end of period	$1,003,311	$673,757

THE_COMPANY_AND_SUMMARY_OF_SIG

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2014
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 comprised of more than 150 brands and products, including Ask.com, About.com, Match.com, HomeAdvisor and Vimeo. Focused on the areas of search, applications, online dating, media and eCommerce, IAC's family of websites is one of the largest in the world, with over a billion monthly visits across more than 100 countries. IAC includes its Search & Applications, The Match Group, Media and eCommerce reportable segments, as well as investments in unconsolidated affiliates.
	All references to "IAC," the "Company," "we," "our" or "us" in this report are to IAC/InterActiveCorp.
	Change in Reportable Segments
	During the first quarter of 2014, IAC realigned its reportable segments as follows:
	•	The Company created a new segment called "The Match Group" that includes Match, which was previously reported as its own separate segment, and DailyBurn and Tutor, which were previously in the Media and Other segments, respectively.
	•	The businesses within the Local segment, HomeAdvisor, Felix and, for periods prior to July 1, 2013, CityGrid Media, were moved to the eCommerce segment, formerly called the Other segment.
	•	There were no changes to the Search & Applications segment.
	New Non-GAAP Measure
	In addition, the Company introduced Adjusted EBITDA, a new non-GAAP financial measure, beginning with the first quarter of 2014. Going forward, the Company plans to regularly report Adjusted EBITDA and will no longer report Operating Income Before Amortization. We believe Adjusted EBITDA is a useful measure 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.
	Refer to Note 8 to the consolidated financial statements for the reconciliation of Adjusted EBITDA to operating income (loss) by reportable segment.
	Basis of Presentation
	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 U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and notes required by U.S. 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 a 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, 2013.
	Accounting Estimates
	The preparation of consolidated financial statements in accordance with U.S. 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 recovery 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 reserves for income tax contingencies; 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"), which expires on March 31, 2016. Our services agreement requires 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 months ended March 31, 2014 and 2013, revenue earned from Google is $355.6 million and $376.1 million, respectively. This revenue is earned by the businesses comprising the Search & Applications segment. Accounts receivable related to revenue earned from Google totaled $128.0 million and $112.3 million at March 31, 2014 and December 31, 2013, respectively.
	Recent Accounting Pronouncement
	In April 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies the related disclosure requirements. Under the new guidance, a discontinued operation is defined as a disposal of a component or group of components that represents a strategic shift that has, or will have, a major effect on an entity's operations and financial results. The revised guidance is effective for annual fiscal periods beginning after December 15, 2014. Early adoption is permitted. The Company is evaluating the impact the revised guidance will have on our consolidated financial statements.
	Reclassifications
	Certain prior year amounts have been reclassified to conform to the current year presentation.

INCOME_TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2014
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 income tax contingencies 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 realizability 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 months ended March 31, 2014, the Company recorded an income tax provision for continuing operations of $21.4 million, which represents an effective income tax rate of 38%. The effective rate for the three months ended March 31, 2014 is higher than the statutory rate of 35% due primarily to interest on reserves for income tax contingencies and state taxes, partially offset by foreign income taxed at lower rates. For the three months ended March 31, 2013, the Company recorded an income tax provision for continuing operations of $25.7 million, which represents an effective income tax rate of 33%. The effective rate for the three months ended March 31, 2013 is lower than the statutory rate of 35% due primarily to foreign income taxed at lower rates and research credits, partially offset by state taxes.
	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 and discontinued operations for the three months ended March 31, 2014 is a $1.6 million and a $0.8 million expense, respectively, net of related deferred taxes, for interest on unrecognized tax benefits. Included in the income tax provision for continuing operations and discontinued operations for the three months ended March 31, 2013 is a $1.3 million and a $1.0 million expense, respectively, net of related deferred taxes, for interest on unrecognized tax benefits. At March 31, 2014 and December 31, 2013, the Company has accrued $137.0 million and $133.0 million, respectively, for the payment of interest. At March 31, 2014 and December 31, 2013, the Company has accrued $5.3 million and $5.1 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. Various jurisdictions are currently under examination, the most significant of which are France, California, New York and New York City for various tax years beginning with 2006. 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 income tax contingencies and the amounts owed by the Company are recorded in the period they become known.
	On August 28, 2013, the Joint Committee of Taxation completed its review and approved the audit settlement previously agreed to with the Internal Revenue Service for the years ended December 31, 2001 through 2009. The statute of limitations for the years 2001 through 2009 expires on July 1, 2014. At March 31, 2014 and December 31, 2013, unrecognized tax benefits, including interest, are $411.8 million and $408.8 million, respectively. Unrecognized tax benefits, including interest, for the three months ended March 31, 2014 increased by $3.0 million due principally to interest accruals. Of the total unrecognized tax benefits at March 31, 2014, $409.4 million is included in "Income taxes payable," $2.1 million relates to deferred tax assets included in "Deferred income taxes" and $0.3 million is included in "Accrued expenses and other current liabilities" in the accompanying consolidated balance sheet. Included in unrecognized tax benefits at March 31, 2014 is $43.1 million relating to tax positions for which the ultimate deductibility is highly certain, but for which there is uncertainty about the timing of such deductibility. If unrecognized tax benefits at March 31, 2014 are subsequently recognized, $124.0 million and $173.8 million, net of related deferred tax assets and interest, would reduce income tax expense for continuing operations and discontinued operations, respectively. The Company believes that it is reasonably possible that its unrecognized tax benefits could decrease within twelve months of the current reporting date. An estimate of changes in unrecognized tax benefits, while potentially significant, cannot be made.

MARKETABLE_SECURITIES

MARKETABLE SECURITIES	3 Months Ended
	Mar. 31, 2014
Marketable Securities [Abstract]	'
MARKETABLE SECURITIES	'
	MARKETABLE SECURITIES
	At March 31, 2014, current available-for-sale marketable securities are as follows:
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
		(In thousands)
	Corporate debt securities	$	33,964	$	15		$	(18	)	$	33,961
	Total debt securities	33,964		15			(18		)	33,961
	Equity securities	314		5,268			—			5,582
	Total marketable securities	$	34,278	$	5,283		$	(18	)	$	39,543
	At December 31, 2013, current available-for-sale marketable securities are as follows:
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
		(In thousands)
	Corporate debt security	$	1,004	$	4		$	—		$	1,008
	Total debt security	1,004		4			—			1,008
	Equity securities	216		4,780			—			4,996
	Total marketable securities	$	1,220	$	4,784		$	—		$	6,004
	The net unrealized gains in the tables above are included in "Accumulated other comprehensive loss" in the accompanying consolidated balance sheet.
	The contractual maturities of debt securities classified as current available-for-sale at March 31, 2014 are as follows:
		Amortized		Estimated
		Cost		Fair Value
		(In thousands)
	Due in one year or less	$	6,081	$	6,082
	Due after one year through five years	27,883		27,879
	Total	$	33,964	$	33,961
	The following table summarizes investments in current available-for-sale marketable debt securities (4 in total at March 31, 2014) that have been in a continuous unrealized loss position for less than twelve months:
		March 31,
		2014					2013
		(In thousands)
		Fair		Gross			Fair			Gross
		Value		Unrealized			Value			Unrealized
				Losses						Losses
	Corporate debt securities	$	16,174	$	(18	)	$	—		$	—
	Total	$	16,174	$	(18	)	$	—		$	—
	At March 31, 2014 and 2013, there are no investments in current available-for-sale marketable securities that have been in a continuous unrealized loss position for twelve months or longer.
	All of the Company’s marketable debt securities are rated investment grade. The gross unrealized losses on the marketable debt securities relate principally to changes in interest rates. Because the Company does not intend to sell any marketable debt securities and it is not more likely than not that the Company will be required to sell any marketable debt securities before recovery of their amortized cost bases, which may be maturity, the Company does not consider any of its marketable debt securities to be other-than-temporarily impaired at March 31, 2014.
	The following table presents the proceeds from maturities and sales of current and non-current available-for-sale marketable securities:
		Three Months Ended March 31,
		2014		2013
		(In thousands)
	Proceeds from maturities and sales of available-for-sale marketable securities	$	—	$	12,500
	There were no gross realized gains or losses from the maturities and sales of available-for-sale marketable securities for the three months ended March 31, 2014 and 2013.
	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.

FAIR_VALUE_MEASUREMENTS_AND_FI

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE MEASUREMENTS	'
	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 determining the fair value of 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 that 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 value 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:
		March 31, 2014
		Quoted Market			Significant			Significant			Total
		Prices in Active			Other			Unobservable			Fair Value
		Markets for			Observable			Inputs			Measurements
		Identical Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Cash equivalents:
	Money market funds	$	426,050		$	—		$	—		$	426,050
	Commercial paper	—			184,005			—			184,005
	Time deposits	—			54,623			—			54,623
	Marketable securities:
	Corporate debt securities	—			33,961			—			33,961
	Equity securities	5,582			—			—			5,582
	Long-term investments:
	Auction rate security	—			—			9,150			9,150
	Marketable equity security	10,218			—			—			10,218
	Total	$	441,850		$	272,589		$	9,150		$	723,589
	Liabilities:
	Contingent consideration arrangements	$	—		$	—		$	(48,758	)	$	(48,758	)
		December 31, 2013
		Quoted Market			Significant			Significant			Total
		Prices in Active			Other			Unobservable			Fair Value
		Markets for			Observable			Inputs			Measurements
		Identical Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Cash equivalents:
	Money market funds	$	698,307		$	—		$	—		$	698,307
	Commercial paper	—			12,000			—			12,000
	Time deposits	—			32,325			—			32,325
	Marketable securities:
	Corporate debt security	—			1,008			—			1,008
	Equity securities	4,996			—			—			4,996
	Long-term investments:
	Auction rate security	—			—			8,920			8,920
	Marketable equity securities	11,711			—			—			11,711
	Total	$	715,014		$	45,333		$	8,920		$	769,267
	Liabilities:
	Contingent consideration arrangements	$	—		$	—		$	(45,828	)	$	(45,828	)
	The following table presents 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 March 31,
		2014						2013
		Auction Rate			Contingent			Auction Rate			Contingent
		Security			Consideration			Security			Consideration
					Arrangements						Arrangements
		(In thousands)
	Balance at January 1	$	8,920		$	(45,828	)	$	8,100		$	(1,909	)
	Total net gains (losses):
	Included in earnings (unrealized)	—			27			—			(1,458		)
	Included in other comprehensive income (loss)	230			(363		)	480			—
	Fair value at date of acquisition	—			(2,835		)	—			(41,387		)
	Settlements	—			241			—			177
	Balance at March 31	$	9,150		$	(48,758	)	$	8,580		$	(44,577	)
	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 $0.9 million and $1.1 million at March 31, 2014 and December 31, 2013, respectively. The unrealized losses are included in "Accumulated other comprehensive loss" in the accompanying consolidated balance sheet. At March 31, 2014, the auction rate security is rated A-/WR and matures in 2035. The Company does not consider the auction rate security to be other-than-temporarily impaired at March 31, 2014, due to its high 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 March 31, 2014, there are five contingent consideration arrangements related to recent business acquisitions. Four 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 $138.3 million and the fair value of these four arrangements at March 31, 2014 is $47.4 million. The fair value of the one contingent consideration arrangement without a limit on the maximum amount is $1.4 million at March 31, 2014. The contingent consideration arrangements are generally based upon earnings performance and/or operating metrics. The Company primarily uses probability-weighted analyses to determine the amount of the gross liability, and, to the extent the arrangement is long-term in nature, applies a discount rate which captures the risks associated with the obligation. The amount of scenarios in the probability-weighted analyses can vary; generally, more scenarios are prepared for longer duration and more complex arrangements.
The most significant contingent consideration arrangement relates to the January 2013 acquisition of Massive Media, NV, which operates Twoo.com. The Twoo.com contingent consideration arrangement is payable in three annual installments beginning in 2014. The 2014, 2015 and 2016 payments are based upon 2013 EBITDA, EBITDA for 2014 and monthly active users of Twoo.com at December 31, 2014 and EBITDA for 2015 and monthly active users of Twoo.com at December 31, 2015, respectively. The aggregate amount of these payments cannot exceed €83.2 million ($114.8 million at March 31, 2014). The estimate of the fair value for the Twoo.com arrangement is based upon the Company's multi-scenario forecasts of Twoo.com's earnings for 2013, 2014 and 2015 and the number of users at December 31, 2014 and December 31, 2015, and the Company's estimate of the probability of each scenario occurring. These multi-scenario forecasts and related probability assessments were based primarily on management's internal projections and strategic plans, with limited additional consideration given to growth trends of similarly situated businesses. The fair value of this arrangement is determined using a discount rate of 15%.
The fair value 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 March 31, 2014 includes a current portion of $8.0 million and non-current portion of $40.8 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 March 31, 2014 and December 31, 2013, the carrying values of the Company's investments accounted for under the cost method totaled $144.8 million and $137.3 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.
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:
	31-Mar-14						31-Dec-13
	Carrying			Fair			Carrying			Fair
	Value			Value			Value			Value
	(In thousands)
Liabilities:
Long-term debt	$	(1,080,000	)	$	(1,096,897	)	$	(1,080,000	)	$	(1,058,396	)
The fair value of long-term debt is estimated using market prices or indices for similar liabilities and taking into consideration other factors such as credit quality and maturity, which are Level 3 inputs.

LONGTERM_DEBT

LONG-TERM DEBT	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
LONG-TERM DEBT	'
	LONG-TERM DEBT
	The balance of long-term debt is comprised of:
		March 31,		31-Dec-13
		2014
		(In thousands)
	4.875% Senior Notes due November 30, 2018 (the "2013 Senior Notes"); interest payable each May 30 and November 30, which commences 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; interest payable each March 1 and September 1, which commenced March 1, 2006	80,000		80,000
	Total long-term debt	$	1,080,000	$	1,080,000
	The 2013 and 2012 Senior Notes were issued on November 15, 2013 and December 21, 2012, respectively.
	The 2013 and 2012 Senior Notes are unconditionally guaranteed by certain domestic subsidiaries, which are designated as guarantor subsidiaries. The guarantor subsidiaries are the same for the 2013 and 2012 Senior Notes. See Note 10 for guarantor and non-guarantor financial information.
	The indentures governing the 2013 and 2012 Senior Notes contain identical covenants that would limit our ability to pay dividends or make other distributions and repurchase or redeem our stock in the event a default has occurred or we are not in compliance with the financial ratio set forth in the indenture. At March 31, 2014, there were no limitations pursuant thereto. There are additional covenants that limit our ability and the ability of our subsidiaries to, among other things, (i) incur indebtedness, make investments, or sell assets in the event we are not in compliance with the financial ratio set forth in the indenture, and (ii) incur liens, enter into agreements restricting our subsidiaries' ability to pay dividends, enter into transactions with affiliates and consolidate, merge or sell all or substantially all of our assets.
	On December 21, 2012, the Company entered into a $300 million revolving credit facility, which expires on December 21, 2017. The annual fee to maintain the revolving credit facility is 25 basis points. At March 31, 2014 and December 31, 2013, there are no outstanding borrowings under the revolving credit facility. IAC's obligation under the revolving credit facility is unconditionally guaranteed by the same domestic subsidiaries that guarantee the 2013 and 2012 Senior Notes and is also secured by the stock of certain of our domestic and foreign subsidiaries.

ACCUMULATED_OTHER_COMPREHENSIV

ACCUMULATED OTHER COMPREHENSIVE LOSS	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
ACCUMULATED OTHER COMPREHENSIVE LOSS	'
	ACCUMULATED OTHER COMPREHENSIVE LOSS
	The following tables present the components of accumulated other comprehensive income (loss) and items reclassified out of accumulated other comprehensive income (loss) into earnings:
		Three Months Ended March 31, 2014
		Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
		(In thousands)
	Balance as of December 31	$	(20,352	)	$	7,306		$	(13,046	)
	Other comprehensive income before reclassifications, net of tax provision of $0.6 million related to unrealized gains on available-for-sale securities	5,220			129			5,349
	Amounts reclassified from accumulated other comprehensive income	—			—			—
	Net current period other comprehensive income	5,220			129			5,349
	Balance as of March 31	$	(15,132	)	$	7,435		$	(7,697	)
		Three Months Ended March 31, 2013
		Foreign Currency Translation Adjustment			Unrealized Losses On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
		(In thousands)
	Balance as of December 31	$	(25,073	)	$	(7,096	)	$	(32,169	)
	Other comprehensive loss before reclassifications, net of tax provision of $0.8 million related to unrealized gains on available-for-sale securities	(6,951		)	(4,975		)	(11,926		)
	Amounts reclassified from accumulated other comprehensive loss	—			(1		)	(1		)
	Net current period other comprehensive loss	(6,951		)	(4,976		)	(11,927		)
	Balance as of March 31	$	(32,024	)	$	(12,072	)	$	(44,096	)
	Unrealized gains and losses, net of tax, reclassified out of accumulated other comprehensive loss related to the maturities and sales of available-for-sale securities are included in "Other (expense) income, net" in the accompanying consolidated statement of operations.

EARNINGS_PER_SHARE

EARNINGS PER SHARE	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
EARNINGS PER SHARE	'
	EARNINGS PER SHARE
	The following table sets forth the computation of basic and diluted earnings per share attributable to IAC shareholders.
		Three Months Ended March 31,
		2014						2013
		Basic			Diluted			Basic			Diluted
		(In thousands, except per share data)
	Numerator:
	Earnings from continuing operations	$	34,305		$	34,305		$	52,709		$	52,709
	Net loss attributable to noncontrolling interests	2,394			2,394			1,872			1,872
	Earnings from continuing operations attributable to IAC shareholders	36,699			36,699			54,581			54,581
	Loss from discontinued operations attributable to IAC shareholders	(814		)	(814		)	(944		)	(944		)
	Net earnings attributable to IAC shareholders	$	35,885		$	35,885		$	53,637		$	53,637
	Denominator:
	Weighted average basic shares outstanding	82,484			82,484			84,218			84,218
	Dilutive securities including stock options and RSUs(a)	—			4,720			—			3,162
	Denominator for earnings per share—weighted average shares(a)	82,484			87,204			84,218			87,380
	Earnings (loss) per share attributable to IAC shareholders:
	Earnings per share from continuing operations	$	0.44		$	0.42		$	0.65		$	0.62
	Discontinued operations	—			(0.01		)	(0.01		)	(0.01		)
	Earnings per share	$	0.44		$	0.41		$	0.64		$	0.61
	____________________________________________
	(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 months ended March 31, 2014, there are no securities that are excluded from the calculation of diluted earnings per share. For the three months ended March 31, 2013, approximately 3.4 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.

SEGMENT_INFORMATION

SEGMENT INFORMATION	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
SEGMENT INFORMATION	'
	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 March 31,
		2014			2013
		(In thousands)
	Revenue:
	Search & Applications	$	398,035		$	397,192
	The Match Group	211,187			192,875
	Media	36,355			44,995
	eCommerce	94,842			107,297
	Inter-segment elimination	(172		)	(110		)
	Total	$	740,247		$	742,249
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Operating Income (Loss):
	Search & Applications	$	70,337		$	86,983
	The Match Group	39,803			37,359
	Media	(8,566		)	(7,157		)
	eCommerce	(1,561		)	(4,493		)
	Corporate	(28,301		)	(28,141		)
	Total	$	71,712		$	84,551
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Adjusted EBITDA:
	Search & Applications	$	82,071		$	97,514
	The Match Group	47,430			47,906
	Media	(7,864		)	(6,180		)
	eCommerce	2,804			723
	Corporate	(16,346		)	(13,197		)
	Total	$	108,095		$	126,766
	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 March 31,
		2014			2013
		(In thousands)
	Revenue:
	United States	$	504,403		$	514,614
	All other countries	235,844			227,635
	Total	$	740,247		$	742,249
		March 31,			December 31,
		2014			2013
		(In thousands)
	Long-lived assets (excluding goodwill and intangible assets):
	United States	$	269,057		$	271,916
	All other countries	22,054			22,048
	Total	$	291,111		$	293,964
	The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income consisting of: (1) non-cash compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and goodwill and intangible asset impairments 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. IAC endeavors to compensate for the limitations of the non-GAAP measure presented by providing the comparable U.S. GAAP measure with equal or greater prominence, financial statements prepared in accordance with U.S. GAAP, and descriptions of the reconciling items, including quantifying such items, to derive the non-GAAP measure.
	The following tables reconcile Adjusted EBITDA to operating income (loss) for the Company's reportable segments:
		Three Months Ended March 31, 2014
		Adjusted			Non-Cash			Depreciation			Amortization			Acquisition-related Contingent Consideration Fair Value Adjustments			Operating
		EBITDA			Compensation						of Intangibles						Income
					Expense												(Loss)
		(In thousands)
	Search & Applications	$	82,071		$	—		$	(4,465	)	$	(7,269	)	$	—		$	70,337
	The Match Group	47,430			(17		)	(5,800		)	(1,837		)	27			39,803
	Media	(7,864		)	(164		)	(282		)	(256		)	—			(8,566		)
	eCommerce	2,804			—			(1,748		)	(2,617		)	—			(1,561		)
	Corporate	(16,346		)	(9,432		)	(2,523		)	—			—			(28,301		)
	Total	$	108,095		$	(9,613	)	$	(14,818	)	$	(11,979	)	$	27		$	71,712
		Three Months Ended March 31, 2013
		Adjusted			Non-Cash			Depreciation			Amortization			Acquisition-related Contingent Consideration Fair Value Adjustments			Operating
		EBITDA			Compensation						of Intangibles						Income
			Expense								(Loss)
	(In thousands)
Search & Applications	$	97,514		$	(3	)	$	(3,865	)	$	(6,663	)	$	—		$	86,983
The Match Group	47,906			157			(4,706		)	(4,540		)	(1,458		)	37,359
Media	(6,180		)	(205		)	(523		)	(249		)	—			(7,157		)
eCommerce	723			29			(2,619		)	(2,626		)	—			(4,493		)
Corporate	(13,197		)	(12,641		)	(2,303		)	—			—			(28,141		)
Total	$	126,766		$	(12,663	)	$	(14,016	)	$	(14,078	)	$	(1,458	)	$	84,551

CONTINGENCIES

CONTINGENCIES	3 Months Ended
	Mar. 31, 2013
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.

GUARANTOR_AND_NONGUARANTOR_FIN

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	3 Months Ended
	Mar. 31, 2014
Guarantor and Nonguarantor Financial Statements [Abstract]	'
GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	'
	GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION
	The 2013 and 2012 Senior Notes are unconditionally guaranteed, jointly and severally, by certain domestic subsidiaries which are 100% owned by the Company. The following tables present condensed consolidating financial information at March 31, 2014 and December 31, 2013 and for the three months ended March 31, 2014 and 2013 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 March 31, 2014:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Cash and cash equivalents	$	670,607		$	—		$	332,704		$	—		$	1,003,311
	Marketable securities	33,961			—			5,582			—			39,543
	Accounts receivable, net	30			148,753			92,234			—			241,017
	Other current assets	63,187			75,085			49,977			(1,044		)	187,205
	Intercompany receivables	—			524,844			830,023			(1,354,867		)	—
	Property and equipment, net	5,108			218,643			67,360			—			291,111
	Goodwill	—			1,185,760			529,841			—			1,715,601
	Intangible assets, net	—			293,311			178,926			—			472,237
	Investment in subsidiaries	3,857,408			825,826			—			(4,683,234		)	—
	Other non-current assets	85,073			19,132			175,914			(6,088		)	274,031
	Total assets	$	4,715,374		$	3,291,354		$	2,262,561		$	(6,045,233	)	$	4,224,056
	Accounts payable, trade	$	5,023		$	33,202		$	29,291		$	—		$	67,516
	Other current liabilities	40,684			269,022			223,421			—			533,127
	Long-term debt	1,000,000			80,000			—			—			1,080,000
	Income taxes payable	386,168			7,785			26,303			—			420,256
	Intercompany liabilities	1,354,867			—			—			(1,354,867		)	—
	Other long-term liabilities	219,138			94,941			79,101			(7,132		)	386,048
	Redeemable noncontrolling interests	—			—			25,885			—			25,885
	IAC shareholders' equity	1,709,494			2,806,404			1,876,830			(4,683,234		)	1,709,494
	Noncontrolling interests	—			—			1,730			—			1,730
	Total liabilities and shareholders' equity	$	4,715,374		$	3,291,354		$	2,262,561		$	(6,045,233	)	$	4,224,056
	Balance sheet at December 31, 2013:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Cash and cash equivalents	$	782,022		$	—		$	318,422		$	—		$	1,100,444
	Marketable securities	1,007			—			4,997			—			6,004
	Accounts receivable, net	38			134,307			73,063			—			207,408
	Other current assets	45,111			73,487			43,746			(814		)	161,530
	Intercompany receivables	—			564,999			851,454			(1,416,453		)	—
	Property and equipment, net	5,316			220,756			67,892			—			293,964
	Goodwill	—			1,180,159			495,164			—			1,675,323
	Intangible assets, net	—			301,513			143,823			—			445,336
	Investment in subsidiaries	3,833,751			782,840			—			(4,616,591		)	—
	Other non-current assets	83,207			15,485			252,612			(6,629		)	344,675
	Total assets	$	4,750,452		$	3,273,546		$	2,251,173		$	(6,040,487	)	$	4,234,684
	Accounts payable, trade	$	4,310		$	51,302		$	22,041		$	—		$	77,653
	Other current liabilities	41,623			254,882			212,739			—			509,244
	Long-term debt	1,000,000			80,000			—			—			1,080,000
	Income taxes payable	383,926			6,768			25,690			—			416,384
	Intercompany liabilities	1,416,453			—			—			(1,416,453		)	—
	Other long-term liabilities	217,404			96,091			73,089			(7,443		)	379,141
	Redeemable noncontrolling interests	—			—			42,861			—			42,861
	IAC shareholders' equity	1,686,736			2,784,503			1,832,088			(4,616,591		)	1,686,736
	Noncontrolling interests	—			—			42,665			—			42,665
	Total liabilities and shareholders' equity	$	4,750,452		$	3,273,546		$	2,251,173		$	(6,040,487	)	$	4,234,684
	Statement of operations for the three months ended March 31, 2014:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Revenue	$	—		$	518,264		$	223,587		$	(1,604	)	$	740,247
	Operating costs and expenses:
	Cost of revenue (exclusive of depreciation shown separately below)	(28		)	116,751			93,431			(960		)	209,194
	Selling and marketing expense	192			226,801			72,035			(316		)	298,712
	General and administrative expense	22,446			40,991			31,366			13			94,816
	Product development expense	1,471			25,969			11,917			(341		)	39,016
	Depreciation	329			9,293			5,196			—			14,818
	Amortization of intangibles	—			8,277			3,702			—			11,979
	Total operating costs and expenses	24,410			428,082			217,647			(1,604		)	668,535
	Operating (loss) income	(24,410		)	90,182			5,940			—			71,712
Equity in earnings (losses) of unconsolidated affiliates	54,259			8,422			(27		)	(64,589		)	(1,935		)
Interest expense	(12,985		)	(1,042		)	(37		)	—			(14,064		)
Other income (expense), net	9,699			(8,751		)	(971		)	—			(23		)
Earnings from continuing operations before income taxes	26,563			88,811			4,905			(64,589		)	55,690
Income tax benefit (provision)	10,136			(30,161		)	(1,360		)	—			(21,385		)
Earnings from continuing operations	36,699			58,650			3,545			(64,589		)	34,305
Loss from discontinued operations, net of tax	(814		)	—			(13		)	13			(814		)
Net earnings	35,885			58,650			3,532			(64,576		)	33,491
Net loss attributable to noncontrolling interests	—			—			2,394			—			2,394
Net earnings attributable to IAC shareholders	$	35,885		$	58,650		$	5,926		$	(64,576	)	$	35,885
Comprehensive income attributable to IAC shareholders	$	41,234		$	59,032		$	9,622		$	(68,654	)	$	41,234
Statement of operations for the three months ended March 31, 2013:
	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Revenue	$	—		$	528,644		$	214,642		$	(1,037	)	$	742,249
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	677			153,800			102,151			(779		)	255,849
Selling and marketing expense	431			182,743			59,997			(257		)	242,914
General and administrative expense	22,245			40,273			33,207			(1		)	95,724
Product development expense	899			23,042			11,176			—			35,117
Depreciation	367			9,249			4,400			—			14,016
Amortization of intangibles	—			8,962			5,116			—			14,078
Total operating costs and expenses	24,619			418,069			216,047			(1,037		)	657,698
Operating (loss) income	(24,619		)	110,575			(1,405		)	—			84,551
Equity in earnings (losses) of unconsolidated affiliates	114,550			2,396			(91		)	(116,946		)	(91		)
Interest expense	(6,557		)	(1,065		)	(41		)	—			(7,663		)
Other (expense) income, net	(55,448		)	(18,138		)	75,244			—			1,658
Earnings from continuing operations before income taxes	27,926			93,768			73,707			(116,946		)	78,455
Income tax benefit (provision)	26,655			(33,806		)	(18,595		)	—			(25,746		)
Earnings from continuing operations	54,581			59,962			55,112			(116,946		)	52,709
(Loss) earnings from discontinued operations, net of tax	(944		)	—			7			(7		)	(944		)
Net earnings	53,637			59,962			55,119			(116,953		)	51,765
Net loss attributable to noncontrolling interests	—			8			1,864			—			1,872
Net earnings attributable to IAC shareholders	$	53,637		$	59,970		$	56,983		$	(116,953	)	$	53,637
Comprehensive income attributable to IAC shareholders	$	41,710		$	59,895		$	40,890		$	(100,785	)	$	41,710
Statement of cash flows for the three months ended March 31, 2014:
	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Net cash (used in) provided by operating activities attributable to continuing operations	$	(29,250	)	$	73,160		$	(1,206	)	$	—		$	42,704
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	—			(51,263		)	(26,718		)	—			(77,981		)
Capital expenditures	(985		)	(5,661		)	(3,075		)	—			(9,721		)
Purchases of marketable debt securities	(32,848		)	—			—			—			(32,848		)
Purchases of long-term investments	(3,000		)	(3,286		)	(1,575		)	—			(7,861		)
Other, net	2			—			(159		)	—			(157		)
Net cash used in investing activities attributable to continuing operations	(36,831		)	(60,210		)	(31,527		)	—			(128,568		)
Cash flows from financing activities attributable to continuing operations:
Dividends	(20,004		)	—			—			—			(20,004		)
Issuance of common stock, net of withholding taxes	920			—			—			—			920
Excess tax benefits from stock-based awards	15,610			—			8,593			—			24,203
Purchase of noncontrolling interests	—			(30,000		)	—			—			(30,000		)
Funds returned from escrow for Meetic tender offer	—			—			12,354			—			12,354
Intercompany	(41,436		)	17,051			24,385			—			—
Other, net	(374		)	—			79			—			(295		)
Net cash (used in) provided by financing activities attributable to continuing operations	(45,284		)	(12,949		)	45,411			—			(12,822		)
Total cash (used in) provided by continuing operations	(111,365		)	1			12,678			—			(98,686		)
Total cash used in discontinued operations	(50		)	—			(13		)	—			(63		)
Effect of exchange rate changes on cash and cash equivalents	—			(1		)	1,617			—			1,616
Net (decrease) increase in cash and cash equivalents	(111,415		)	—			14,282			—			(97,133		)
Cash and cash equivalents at beginning of period	782,022			—			318,422			—			1,100,444
Cash and cash equivalents at end of period	$	670,607		$	—		$	332,704		$	—		$	1,003,311
Statement of cash flows for the three months ended March 31, 2013:
	IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
	(In thousands)
Net cash (used in) provided by operating activities attributable to continuing operations	$	(1,106	)	$	106,037		$	(12,569	)	$	—		$	92,362
Cash flows from investing activities attributable to continuing operations:
Acquisitions, net of cash acquired	—			(6,060		)	(23,134		)	—			(29,194		)
Capital expenditures	(78		)	(28,920		)	(4,640		)	—			(33,638		)
Proceeds from maturities and sales of marketable debt securities	12,500			—			—			—			12,500
Purchases of long-term investments	—			—			(975		)	—			(975		)
Other, net	(55		)	—			(782		)	—			(837		)
Net cash provided by (used in) investing activities attributable to continuing operations	12,367			(34,980		)	(29,531		)	—			(52,144		)
Cash flows from financing activities attributable to continuing operations:
Principal payments on long-term debt	(15,844		)	—			—			—			(15,844		)
Purchase of treasury stock	(88,605		)	—			—			—			(88,605		)
Dividends	(21,429		)	—			—			—			(21,429		)
Issuance of common stock, net of withholding taxes	552			—			—			—			552
Excess tax benefits from stock-based awards	12,530			—			—			—			12,530
Intercompany	29,317			(71,056		)	41,739			—			—
Other, net	(927		)	(29		)	(145		)	—			(1,101		)
Net cash (used in) provided by financing activities attributable to continuing operations	(84,406		)	(71,085		)	41,594			—			(113,897		)
Total cash used in continuing operations	(73,145		)	(28		)	(506		)	—			(73,679		)
Total cash provided by (used in) discontinued operations	2,426			—			(1		)	—			2,425
Effect of exchange rate changes on cash and cash equivalents	—			28			(4,994		)	—			(4,966		)
Net decrease in cash and cash equivalents	(70,719		)	—			(5,501		)	—			(76,220		)
Cash and cash equivalents at beginning of period	501,075			—			248,902			—			749,977
Cash and cash equivalents at end of period	$	430,356		$	—		$	243,401		$	—		$	673,757

THE_COMPANY_AND_SUMMARY_OF_SIG1

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Accounting Estimates	'
	Accounting Estimates
	The preparation of consolidated financial statements in accordance with U.S. 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 recovery 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 reserves for income tax contingencies; 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.

MARKETABLE_SECURITIES_Tables

MARKETABLE SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2014
Marketable Securities [Abstract]	'
Schedule of current available-for-sale marketable securities	'
	At March 31, 2014, current available-for-sale marketable securities are as follows:
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
		(In thousands)
	Corporate debt securities	$	33,964	$	15		$	(18	)	$	33,961
	Total debt securities	33,964		15			(18		)	33,961
	Equity securities	314		5,268			—			5,582
	Total marketable securities	$	34,278	$	5,283		$	(18	)	$	39,543
	At December 31, 2013, current available-for-sale marketable securities are as follows:
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
		(In thousands)
	Corporate debt security	$	1,004	$	4		$	—		$	1,008
	Total debt security	1,004		4			—			1,008
	Equity securities	216		4,780			—			4,996
	Total marketable securities	$	1,220	$	4,784		$	—		$	6,004
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 March 31, 2014 are as follows:
		Amortized		Estimated
		Cost		Fair Value
		(In thousands)
	Due in one year or less	$	6,081	$	6,082
	Due after one year through five years	27,883		27,879
	Total	$	33,964	$	33,961
Schedule of Unrealized Loss on Investments	'
	The following table summarizes investments in current available-for-sale marketable debt securities (4 in total at March 31, 2014) that have been in a continuous unrealized loss position for less than twelve months:
		March 31,
		2014					2013
		(In thousands)
		Fair		Gross			Fair			Gross
		Value		Unrealized			Value			Unrealized
				Losses						Losses
	Corporate debt securities	$	16,174	$	(18	)	$	—		$	—
	Total	$	16,174	$	(18	)	$	—		$	—
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:
		Three Months Ended March 31,
		2014		2013
		(In thousands)
	Proceeds from maturities and sales of available-for-sale marketable securities	$	—	$	12,500

FAIR_VALUE_MEASUREMENTS_AND_FI1

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities 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:
		March 31, 2014
		Quoted Market			Significant			Significant			Total
		Prices in Active			Other			Unobservable			Fair Value
		Markets for			Observable			Inputs			Measurements
		Identical Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Cash equivalents:
	Money market funds	$	426,050		$	—		$	—		$	426,050
	Commercial paper	—			184,005			—			184,005
	Time deposits	—			54,623			—			54,623
	Marketable securities:
	Corporate debt securities	—			33,961			—			33,961
	Equity securities	5,582			—			—			5,582
	Long-term investments:
	Auction rate security	—			—			9,150			9,150
	Marketable equity security	10,218			—			—			10,218
	Total	$	441,850		$	272,589		$	9,150		$	723,589
	Liabilities:
	Contingent consideration arrangements	$	—		$	—		$	(48,758	)	$	(48,758	)
		December 31, 2013
		Quoted Market			Significant			Significant			Total
		Prices in Active			Other			Unobservable			Fair Value
		Markets for			Observable			Inputs			Measurements
		Identical Assets			Inputs			(Level 3)
		(Level 1)			(Level 2)
		(In thousands)
	Assets:
	Cash equivalents:
	Money market funds	$	698,307		$	—		$	—		$	698,307
	Commercial paper	—			12,000			—			12,000
	Time deposits	—			32,325			—			32,325
	Marketable securities:
	Corporate debt security	—			1,008			—			1,008
	Equity securities	4,996			—			—			4,996
	Long-term investments:
	Auction rate security	—			—			8,920			8,920
	Marketable equity securities	11,711			—			—			11,711
	Total	$	715,014		$	45,333		$	8,920		$	769,267
	Liabilities:
	Contingent consideration arrangements	$	—		$	—		$	(45,828	)	$	(45,828	)
Schedule of changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)	'
	The following table presents 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 March 31,
		2014						2013
		Auction Rate			Contingent			Auction Rate			Contingent
		Security			Consideration			Security			Consideration
					Arrangements						Arrangements
		(In thousands)
	Balance at January 1	$	8,920		$	(45,828	)	$	8,100		$	(1,909	)
	Total net gains (losses):
	Included in earnings (unrealized)	—			27			—			(1,458		)
	Included in other comprehensive income (loss)	230			(363		)	480			—
	Fair value at date of acquisition	—			(2,835		)	—			(41,387		)
	Settlements	—			241			—			177
	Balance at March 31	$	9,150		$	(48,758	)	$	8,580		$	(44,577	)
Fair Value, by Balance Sheet Grouping	'
	The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:
		31-Mar-14						31-Dec-13
		Carrying			Fair			Carrying			Fair
		Value			Value			Value			Value
		(In thousands)
	Liabilities:
	Long-term debt	$	(1,080,000	)	$	(1,096,897	)	$	(1,080,000	)	$	(1,058,396	)

LONGTERM_DEBT_Tables

LONG-TERM DEBT (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt Instruments	'
	The balance of long-term debt is comprised of:
		March 31,		31-Dec-13
		2014
		(In thousands)
	4.875% Senior Notes due November 30, 2018 (the "2013 Senior Notes"); interest payable each May 30 and November 30, which commences 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; interest payable each March 1 and September 1, which commenced March 1, 2006	80,000		80,000
	Total long-term debt	$	1,080,000	$	1,080,000

ACCUMULATED_OTHER_COMPREHENSIV1

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Schedule of accumulated other comprehensive loss	'
	The following tables present the components of accumulated other comprehensive income (loss) and items reclassified out of accumulated other comprehensive income (loss) into earnings:
		Three Months Ended March 31, 2014
		Foreign Currency Translation Adjustment			Unrealized Gains On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
		(In thousands)
	Balance as of December 31	$	(20,352	)	$	7,306		$	(13,046	)
	Other comprehensive income before reclassifications, net of tax provision of $0.6 million related to unrealized gains on available-for-sale securities	5,220			129			5,349
	Amounts reclassified from accumulated other comprehensive income	—			—			—
	Net current period other comprehensive income	5,220			129			5,349
	Balance as of March 31	$	(15,132	)	$	7,435		$	(7,697	)
		Three Months Ended March 31, 2013
		Foreign Currency Translation Adjustment			Unrealized Losses On Available-For-Sale Securities			Accumulated Other Comprehensive Loss
		(In thousands)
	Balance as of December 31	$	(25,073	)	$	(7,096	)	$	(32,169	)
	Other comprehensive loss before reclassifications, net of tax provision of $0.8 million related to unrealized gains on available-for-sale securities	(6,951		)	(4,975		)	(11,926		)
	Amounts reclassified from accumulated other comprehensive loss	—			(1		)	(1		)
	Net current period other comprehensive loss	(6,951		)	(4,976		)	(11,927		)
	Balance as of March 31	$	(32,024	)	$	(12,072	)	$	(44,096	)

EARNINGS_PER_SHARE_Tables

EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Computation of basic and diluted earnings per share	'
	The following table sets forth the computation of basic and diluted earnings per share attributable to IAC shareholders.
		Three Months Ended March 31,
		2014						2013
		Basic			Diluted			Basic			Diluted
		(In thousands, except per share data)
	Numerator:
	Earnings from continuing operations	$	34,305		$	34,305		$	52,709		$	52,709
	Net loss attributable to noncontrolling interests	2,394			2,394			1,872			1,872
	Earnings from continuing operations attributable to IAC shareholders	36,699			36,699			54,581			54,581
	Loss from discontinued operations attributable to IAC shareholders	(814		)	(814		)	(944		)	(944		)
	Net earnings attributable to IAC shareholders	$	35,885		$	35,885		$	53,637		$	53,637
	Denominator:
	Weighted average basic shares outstanding	82,484			82,484			84,218			84,218
	Dilutive securities including stock options and RSUs(a)	—			4,720			—			3,162
	Denominator for earnings per share—weighted average shares(a)	82,484			87,204			84,218			87,380
	Earnings (loss) per share attributable to IAC shareholders:
	Earnings per share from continuing operations	$	0.44		$	0.42		$	0.65		$	0.62
	Discontinued operations	—			(0.01		)	(0.01		)	(0.01		)
	Earnings per share	$	0.44		$	0.41		$	0.64		$	0.61
	____________________________________________
	(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 months ended March 31, 2014, there are no securities that are excluded from the calculation of diluted earnings per share. For the three months ended March 31, 2013, approximately 3.4 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.

SEGMENT_INFORMATION_Tables

SEGMENT INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Schedule of reconciliation of revenues from segments to consolidated	'
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Revenue:
	Search & Applications	$	398,035		$	397,192
	The Match Group	211,187			192,875
	Media	36,355			44,995
	eCommerce	94,842			107,297
	Inter-segment elimination	(172		)	(110		)
	Total	$	740,247		$	742,249
Schedule of reconciliation of operating income (loss) from segments to consolidated	'
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Operating Income (Loss):
	Search & Applications	$	70,337		$	86,983
	The Match Group	39,803			37,359
	Media	(8,566		)	(7,157		)
	eCommerce	(1,561		)	(4,493		)
	Corporate	(28,301		)	(28,141		)
	Total	$	71,712		$	84,551
Schedule of reconciliation of Adjusted EBITDA from segments to consolidated	'
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Adjusted EBITDA:
	Search & Applications	$	82,071		$	97,514
	The Match Group	47,430			47,906
	Media	(7,864		)	(6,180		)
	eCommerce	2,804			723
	Corporate	(16,346		)	(13,197		)
	Total	$	108,095		$	126,766
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 March 31,
		2014			2013
		(In thousands)
	Revenue:
	United States	$	504,403		$	514,614
	All other countries	235,844			227,635
	Total	$	740,247		$	742,249
		March 31,			December 31,
		2014			2013
		(In thousands)
	Long-lived assets (excluding goodwill and intangible assets):
	United States	$	269,057		$	271,916
	All other countries	22,054			22,048
	Total	$	291,111		$	293,964
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 March 31, 2014
		Adjusted			Non-Cash			Depreciation			Amortization			Acquisition-related Contingent Consideration Fair Value Adjustments			Operating
		EBITDA			Compensation						of Intangibles						Income
					Expense												(Loss)
		(In thousands)
	Search & Applications	$	82,071		$	—		$	(4,465	)	$	(7,269	)	$	—		$	70,337
	The Match Group	47,430			(17		)	(5,800		)	(1,837		)	27			39,803
	Media	(7,864		)	(164		)	(282		)	(256		)	—			(8,566		)
	eCommerce	2,804			—			(1,748		)	(2,617		)	—			(1,561		)
	Corporate	(16,346		)	(9,432		)	(2,523		)	—			—			(28,301		)
	Total	$	108,095		$	(9,613	)	$	(14,818	)	$	(11,979	)	$	27		$	71,712
		Three Months Ended March 31, 2013
		Adjusted			Non-Cash			Depreciation			Amortization			Acquisition-related Contingent Consideration Fair Value Adjustments			Operating
		EBITDA			Compensation						of Intangibles						Income
					Expense												(Loss)
		(In thousands)
	Search & Applications	$	97,514		$	(3	)	$	(3,865	)	$	(6,663	)	$	—		$	86,983
	The Match Group	47,906			157			(4,706		)	(4,540		)	(1,458		)	37,359
	Media	(6,180		)	(205		)	(523		)	(249		)	—			(7,157		)
	eCommerce	723			29			(2,619		)	(2,626		)	—			(4,493		)
	Corporate	(13,197		)	(12,641		)	(2,303		)	—			—			(28,141		)
	Total	$	126,766		$	(12,663	)	$	(14,016	)	$	(14,078	)	$	(1,458	)	$	84,551

GUARANTOR_AND_NONGUARANTOR_FIN1

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2014
Guarantor and Nonguarantor Financial Statements [Abstract]	'
Schedule of condensed balance sheet	'
	Balance sheet at March 31, 2014:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Cash and cash equivalents	$	670,607		$	—		$	332,704		$	—		$	1,003,311
	Marketable securities	33,961			—			5,582			—			39,543
	Accounts receivable, net	30			148,753			92,234			—			241,017
	Other current assets	63,187			75,085			49,977			(1,044		)	187,205
	Intercompany receivables	—			524,844			830,023			(1,354,867		)	—
	Property and equipment, net	5,108			218,643			67,360			—			291,111
	Goodwill	—			1,185,760			529,841			—			1,715,601
	Intangible assets, net	—			293,311			178,926			—			472,237
	Investment in subsidiaries	3,857,408			825,826			—			(4,683,234		)	—
	Other non-current assets	85,073			19,132			175,914			(6,088		)	274,031
	Total assets	$	4,715,374		$	3,291,354		$	2,262,561		$	(6,045,233	)	$	4,224,056
	Accounts payable, trade	$	5,023		$	33,202		$	29,291		$	—		$	67,516
	Other current liabilities	40,684			269,022			223,421			—			533,127
	Long-term debt	1,000,000			80,000			—			—			1,080,000
	Income taxes payable	386,168			7,785			26,303			—			420,256
	Intercompany liabilities	1,354,867			—			—			(1,354,867		)	—
	Other long-term liabilities	219,138			94,941			79,101			(7,132		)	386,048
	Redeemable noncontrolling interests	—			—			25,885			—			25,885
	IAC shareholders' equity	1,709,494			2,806,404			1,876,830			(4,683,234		)	1,709,494
	Noncontrolling interests	—			—			1,730			—			1,730
	Total liabilities and shareholders' equity	$	4,715,374		$	3,291,354		$	2,262,561		$	(6,045,233	)	$	4,224,056
	Balance sheet at December 31, 2013:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Cash and cash equivalents	$	782,022		$	—		$	318,422		$	—		$	1,100,444
	Marketable securities	1,007			—			4,997			—			6,004
	Accounts receivable, net	38			134,307			73,063			—			207,408
	Other current assets	45,111			73,487			43,746			(814		)	161,530
	Intercompany receivables	—			564,999			851,454			(1,416,453		)	—
	Property and equipment, net	5,316			220,756			67,892			—			293,964
	Goodwill	—			1,180,159			495,164			—			1,675,323
	Intangible assets, net	—			301,513			143,823			—			445,336
	Investment in subsidiaries	3,833,751			782,840			—			(4,616,591		)	—
	Other non-current assets	83,207			15,485			252,612			(6,629		)	344,675
	Total assets	$	4,750,452		$	3,273,546		$	2,251,173		$	(6,040,487	)	$	4,234,684
	Accounts payable, trade	$	4,310		$	51,302		$	22,041		$	—		$	77,653
	Other current liabilities	41,623			254,882			212,739			—			509,244
	Long-term debt	1,000,000			80,000			—			—			1,080,000
	Income taxes payable	383,926			6,768			25,690			—			416,384
	Intercompany liabilities	1,416,453			—			—			(1,416,453		)	—
	Other long-term liabilities	217,404			96,091			73,089			(7,443		)	379,141
	Redeemable noncontrolling interests	—			—			42,861			—			42,861
	IAC shareholders' equity	1,686,736			2,784,503			1,832,088			(4,616,591		)	1,686,736
	Noncontrolling interests	—			—			42,665			—			42,665
	Total liabilities and shareholders' equity	$	4,750,452		$	3,273,546		$	2,251,173		$	(6,040,487	)	$	4,234,684
Schedule of condensed income statement	'
	Statement of operations for the three months ended March 31, 2014:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Revenue	$	—		$	518,264		$	223,587		$	(1,604	)	$	740,247
	Operating costs and expenses:
	Cost of revenue (exclusive of depreciation shown separately below)	(28		)	116,751			93,431			(960		)	209,194
	Selling and marketing expense	192			226,801			72,035			(316		)	298,712
	General and administrative expense	22,446			40,991			31,366			13			94,816
	Product development expense	1,471			25,969			11,917			(341		)	39,016
	Depreciation	329			9,293			5,196			—			14,818
	Amortization of intangibles	—			8,277			3,702			—			11,979
	Total operating costs and expenses	24,410			428,082			217,647			(1,604		)	668,535
	Operating (loss) income	(24,410		)	90,182			5,940			—			71,712
	Equity in earnings (losses) of unconsolidated affiliates	54,259			8,422			(27		)	(64,589		)	(1,935		)
	Interest expense	(12,985		)	(1,042		)	(37		)	—			(14,064		)
	Other income (expense), net	9,699			(8,751		)	(971		)	—			(23		)
	Earnings from continuing operations before income taxes	26,563			88,811			4,905			(64,589		)	55,690
	Income tax benefit (provision)	10,136			(30,161		)	(1,360		)	—			(21,385		)
	Earnings from continuing operations	36,699			58,650			3,545			(64,589		)	34,305
	Loss from discontinued operations, net of tax	(814		)	—			(13		)	13			(814		)
	Net earnings	35,885			58,650			3,532			(64,576		)	33,491
	Net loss attributable to noncontrolling interests	—			—			2,394			—			2,394
	Net earnings attributable to IAC shareholders	$	35,885		$	58,650		$	5,926		$	(64,576	)	$	35,885
	Comprehensive income attributable to IAC shareholders	$	41,234		$	59,032		$	9,622		$	(68,654	)	$	41,234
	Statement of operations for the three months ended March 31, 2013:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Revenue	$	—		$	528,644		$	214,642		$	(1,037	)	$	742,249
	Operating costs and expenses:
	Cost of revenue (exclusive of depreciation shown separately below)	677			153,800			102,151			(779		)	255,849
	Selling and marketing expense	431			182,743			59,997			(257		)	242,914
	General and administrative expense	22,245			40,273			33,207			(1		)	95,724
	Product development expense	899			23,042			11,176			—			35,117
	Depreciation	367			9,249			4,400			—			14,016
	Amortization of intangibles	—			8,962			5,116			—			14,078
	Total operating costs and expenses	24,619			418,069			216,047			(1,037		)	657,698
	Operating (loss) income	(24,619		)	110,575			(1,405		)	—			84,551
	Equity in earnings (losses) of unconsolidated affiliates	114,550			2,396			(91		)	(116,946		)	(91		)
	Interest expense	(6,557		)	(1,065		)	(41		)	—			(7,663		)
	Other (expense) income, net	(55,448		)	(18,138		)	75,244			—			1,658
	Earnings from continuing operations before income taxes	27,926			93,768			73,707			(116,946		)	78,455
	Income tax benefit (provision)	26,655			(33,806		)	(18,595		)	—			(25,746		)
	Earnings from continuing operations	54,581			59,962			55,112			(116,946		)	52,709
	(Loss) earnings from discontinued operations, net of tax	(944		)	—			7			(7		)	(944		)
	Net earnings	53,637			59,962			55,119			(116,953		)	51,765
	Net loss attributable to noncontrolling interests	—			8			1,864			—			1,872
	Net earnings attributable to IAC shareholders	$	53,637		$	59,970		$	56,983		$	(116,953	)	$	53,637
	Comprehensive income attributable to IAC shareholders	$	41,710		$	59,895		$	40,890		$	(100,785	)	$	41,710
Schedule of condensed cash flow statement	'
	Statement of cash flows for the three months ended March 31, 2014:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Net cash (used in) provided by operating activities attributable to continuing operations	$	(29,250	)	$	73,160		$	(1,206	)	$	—		$	42,704
	Cash flows from investing activities attributable to continuing operations:
	Acquisitions, net of cash acquired	—			(51,263		)	(26,718		)	—			(77,981		)
	Capital expenditures	(985		)	(5,661		)	(3,075		)	—			(9,721		)
	Purchases of marketable debt securities	(32,848		)	—			—			—			(32,848		)
	Purchases of long-term investments	(3,000		)	(3,286		)	(1,575		)	—			(7,861		)
	Other, net	2			—			(159		)	—			(157		)
	Net cash used in investing activities attributable to continuing operations	(36,831		)	(60,210		)	(31,527		)	—			(128,568		)
	Cash flows from financing activities attributable to continuing operations:
	Dividends	(20,004		)	—			—			—			(20,004		)
	Issuance of common stock, net of withholding taxes	920			—			—			—			920
	Excess tax benefits from stock-based awards	15,610			—			8,593			—			24,203
	Purchase of noncontrolling interests	—			(30,000		)	—			—			(30,000		)
	Funds returned from escrow for Meetic tender offer	—			—			12,354			—			12,354
	Intercompany	(41,436		)	17,051			24,385			—			—
	Other, net	(374		)	—			79			—			(295		)
	Net cash (used in) provided by financing activities attributable to continuing operations	(45,284		)	(12,949		)	45,411			—			(12,822		)
	Total cash (used in) provided by continuing operations	(111,365		)	1			12,678			—			(98,686		)
	Total cash used in discontinued operations	(50		)	—			(13		)	—			(63		)
	Effect of exchange rate changes on cash and cash equivalents	—			(1		)	1,617			—			1,616
	Net (decrease) increase in cash and cash equivalents	(111,415		)	—			14,282			—			(97,133		)
	Cash and cash equivalents at beginning of period	782,022			—			318,422			—			1,100,444
	Cash and cash equivalents at end of period	$	670,607		$	—		$	332,704		$	—		$	1,003,311
	Statement of cash flows for the three months ended March 31, 2013:
		IAC			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Total Eliminations			IAC Consolidated
		(In thousands)
	Net cash (used in) provided by operating activities attributable to continuing operations	$	(1,106	)	$	106,037		$	(12,569	)	$	—		$	92,362
	Cash flows from investing activities attributable to continuing operations:
	Acquisitions, net of cash acquired	—			(6,060		)	(23,134		)	—			(29,194		)
	Capital expenditures	(78		)	(28,920		)	(4,640		)	—			(33,638		)
	Proceeds from maturities and sales of marketable debt securities	12,500			—			—			—			12,500
	Purchases of long-term investments	—			—			(975		)	—			(975		)
	Other, net	(55		)	—			(782		)	—			(837		)
	Net cash provided by (used in) investing activities attributable to continuing operations	12,367			(34,980		)	(29,531		)	—			(52,144		)
	Cash flows from financing activities attributable to continuing operations:
	Principal payments on long-term debt	(15,844		)	—			—			—			(15,844		)
	Purchase of treasury stock	(88,605		)	—			—			—			(88,605		)
	Dividends	(21,429		)	—			—			—			(21,429		)
	Issuance of common stock, net of withholding taxes	552			—			—			—			552
	Excess tax benefits from stock-based awards	12,530			—			—			—			12,530
	Intercompany	29,317			(71,056		)	41,739			—			—
	Other, net	(927		)	(29		)	(145		)	—			(1,101		)
	Net cash (used in) provided by financing activities attributable to continuing operations	(84,406		)	(71,085		)	41,594			—			(113,897		)
	Total cash used in continuing operations	(73,145		)	(28		)	(506		)	—			(73,679		)
	Total cash provided by (used in) discontinued operations	2,426			—			(1		)	—			2,425
	Effect of exchange rate changes on cash and cash equivalents	—			28			(4,994		)	—			(4,966		)
	Net decrease in cash and cash equivalents	(70,719		)	—			(5,501		)	—			(76,220		)
	Cash and cash equivalents at beginning of period	501,075			—			248,902			—			749,977
	Cash and cash equivalents at end of period	$	430,356		$	—		$	243,401		$	—		$	673,757

THE_COMPANY_AND_SUMMARY_OF_SIG2

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	visit
	brand
	country
Revenue from major customers	'	'	'
Minimum number of brands owned by the company	150	'	'
Number of monthly visits to company websites	1,000,000,000	'	'
Number of countries where the company has consumer audiences	100	'	'
Revenue	$740,247	$742,249	'
Accounts receivable, net of allowance of $9,523 and $8,540 respectively	241,017	'	207,408
Google Inc.	'	'	'
Revenue from major customers	'	'	'
Revenue	355,600	376,100	'
Accounts receivable, net of allowance of $9,523 and $8,540 respectively	$128,000	'	$112,300

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'
Income tax provision (benefit)	$21,385,000	$25,746,000	'
Effective tax rate (as a percent)	38.00%	33.00%	'
Federal statutory rate (as a percent)	35.00%	35.00%	'
Total unrecognized tax benefits including interest	411,800,000	'	408,800,000
Unrecognized tax benefits, including interest, increased due principally to interest accruals	3,000,000	'	'
Portion of unrecognized tax benefits included in income taxes payable	409,400,000	'	'
Portion of unrecognized tax benefits related to deferred tax assets included in deferred income taxes	2,100,000	'	'
Portion of unrecognized tax benefits included in accrued expenses and other current liabilities	300,000	'	'
Unrecognized tax benefits, tax positions for which the ultimate deductibility is highly certain but timing is uncertain	43,100,000	'	'
Unrecognized tax benefit, if recognized would reduce income tax expense for continuing operations	124,000,000	'	'
Unrecognized tax benefit, if recognized would reduce income tax expense for discontinued operations	173,800,000	'	'
Interest expense related to unrecognized tax benefits from continuing operations	1,600,000	1,300,000	'
Interest expense related to unrecognized tax benefits from discontinued operations	800,000	1,000,000	'
Accrued interest on unrecognized tax benefits	137,000,000	'	133,000,000
Accrued penalties on unrecognized tax benefits	$5,300,000	'	$5,100,000

MARKETABLE_SECURITIES_Details

MARKETABLE SECURITIES (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current available-for-sale marketable securities	'	'
Amortized Cost	$34,278	$1,220
Gross Unrealized Gains	5,283	4,784
Gross Unrealized Losses	-18	0
Marketable securities	39,543	6,004
Contractual maturities of debt securities classified as available-for-sale	'	'
Due in one year or less, amortized cost	6,081	'
Due after one year through five years, amortized cost	27,883	'
Total Amortized Cost	33,964	'
Due in one year or less, fair value	6,082	'
Due after one year through five years, fair value	27,879	'
Total, Estimated Fair Value	33,961	'
Total debt securities	'	'
Current available-for-sale marketable securities	'	'
Amortized Cost	33,964	1,004
Gross Unrealized Gains	15	4
Gross Unrealized Losses	-18	0
Marketable securities	33,961	1,008
Corporate debt securities	'	'
Current available-for-sale marketable securities	'	'
Amortized Cost	33,964	1,004
Gross Unrealized Gains	15	4
Gross Unrealized Losses	-18	0
Marketable securities	33,961	1,008
Equity securities	'	'
Current available-for-sale marketable securities	'	'
Amortized Cost	314	216
Gross Unrealized Gains	5,268	4,780
Gross Unrealized Losses	0	0
Marketable securities	$5,582	$4,996

MARKETABLE_SECURITIES_Details_

MARKETABLE SECURITIES (Details 1) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	investment
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	4	'	'
Marketable securities	$39,543	'	$6,004
Available-for-sale Securities, Gross Unrealized Loss	-18	'	0
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	0	12,500	'
Corporate Debt Securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	16,174	'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	-18	0	'
Marketable securities	33,961	'	1,008
Available-for-sale Securities, Gross Unrealized Loss	-18	'	0
Total	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Marketable securities	16,174	'	0
Available-for-sale Securities, Gross Unrealized Loss	($18)	$0	'

FAIR_VALUE_MEASUREMENTS_AND_FI2

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:	'	'
Marketable securities	$39,543	$6,004
Fair value on a recurring basis | Quoted Market Prices in Active Markets for Identical Assets (Level 1)	'	'
Assets:	'	'
Total Assets	441,850	715,014
Fair value on a recurring basis | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Money market funds	'	'
Assets:	'	'
Cash equivalents:	426,050	698,307
Fair value on a recurring basis | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Equity securities	'	'
Assets:	'	'
Marketable securities	5,582	4,996
Long-term investments:	10,218	11,711
Fair value on a recurring basis | Significant Other Observable Inputs (Level 2)	'	'
Assets:	'	'
Total Assets	272,589	45,333
Fair value on a recurring basis | Significant Other Observable Inputs (Level 2) | Commercial paper	'	'
Assets:	'	'
Cash equivalents:	184,005	12,000
Fair value on a recurring basis | Significant Other Observable Inputs (Level 2) | Time deposits	'	'
Assets:	'	'
Cash equivalents:	54,623	32,325
Fair value on a recurring basis | Significant Other Observable Inputs (Level 2) | Corporate debt securities	'	'
Assets:	'	'
Marketable securities	33,961	1,008
Fair value on a recurring basis | Significant Unobservable Inputs (Level 3)	'	'
Assets:	'	'
Total Assets	9,150	8,920
Liabilities:	'	'
Contingent consideration arrangement	-48,758	-45,828
Fair value on a recurring basis | Significant Unobservable Inputs (Level 3) | Auction rate security	'	'
Assets:	'	'
Long-term investments:	9,150	8,920
Fair value on a recurring basis | Fair value	'	'
Assets:	'	'
Total Assets	723,589	769,267
Liabilities:	'	'
Contingent consideration arrangement	-48,758	-45,828
Fair value on a recurring basis | Fair value | Money market funds	'	'
Assets:	'	'
Cash equivalents:	426,050	698,307
Fair value on a recurring basis | Fair value | Commercial paper	'	'
Assets:	'	'
Cash equivalents:	184,005	12,000
Fair value on a recurring basis | Fair value | Time deposits	'	'
Assets:	'	'
Cash equivalents:	54,623	32,325
Fair value on a recurring basis | Fair value | Corporate debt securities	'	'
Assets:	'	'
Marketable securities	33,961	1,008
Fair value on a recurring basis | Fair value | Equity securities	'	'
Assets:	'	'
Marketable securities	5,582	4,996
Long-term investments:	10,218	11,711
Fair value on a recurring basis | Fair value | Auction rate security	'	'
Assets:	'	'
Long-term investments:	$9,150	$8,920

FAIR_VALUE_MEASUREMENTS_AND_FI3

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details 1)

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Jan. 04, 2013

Jan. 04, 2013

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

USD ($)

USD ($)

Twoo [Member]

Twoo [Member]

Twoo [Member]

Auction rate security

Auction rate security

Auction rate security

Contingent Consideration Arrangement

Contingent Consideration Arrangement

Carrying value

Carrying value

Fair value

Fair value

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

($1,080,000,000)

($1,080,000,000)

'

'

'

'

'

'

'

'

($1,080,000,000)

($1,080,000,000)

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

'

'

'

'

'

'

'

27,000

-1,458,000

'

'

'

'

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

'

'

'

'

'

8,920,000

8,100,000

8,100,000

'

'

'

'

'

'

Total net gains (losses) included in other comprehensive income (loss)

'

'

'

'

'

230,000

480,000

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)

'

'

'

'

'

'

'

'

-363,000

0

'

'

'

'

Balance at the end of the period, assets

'

'

'

'

'

9,150,000

8,580,000

8,920,000

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance at the beginning of the period

'

'

'

'

'

'

'

'

-45,828,000

-1,909,000

'

'

'

'

Fair value at date of acquisition

'

'

'

'

'

'

'

'

-2,835,000

-41,387,000

'

'

'

'

Settlements

'

'

'

'

'

'

'

'

241,000

177,000

'

'

'

'

Balance at the end of the period

'

'

'

'

'

'

'

'

-48,758,000

-44,577,000

'

'

'

'

Auction rate securities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cost basis

'

'

'

'

'

10,000,000

'

0

'

'

'

'

'

'

Gross unrealized losses

18,000

0

'

'

'

900,000

'

1,100,000

'

'

'

'

'

'

Acquisition information

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition Contingent Consideration Maximum Amount At Balance Sheet date

138,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition Contingent Consideration Fair Value at Balance Sheet Date With A Maximum Limit

47,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition Contingent Consideration Fair value at Balance Sheet Date Without a Limit

1,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High

'

'

'

114,800,000

83,200,000

'

'

'

'

'

'

'

'

'

Fair Value of contingent consideration discount rate for risk

'

'

15.00%

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Contingent Consideration, at Fair Value, Current

8,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent

40,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, Fair Value

'

'

'

'

'

'

'

'

'

'

'

'

-1,096,897,000

-1,058,396,000

Assets measured at fair value on a nonrecurring basis

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cost Method Investments

$144,800,000

$137,300,000

'

'

'

'

'

'

'

'

'

'

'

'

LONGTERM_DEBT_Details

LONG-TERM DEBT (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 21, 2012
Debt Instrument [Line Items]	'	'	'
Total long-term debt	$1,080,000,000	$1,080,000,000	'
Senior Notes | Four Point Eight Seven Five Percent Senior Notes Due November 2018 [Member] [Domain]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total long-term debt	500,000,000	500,000,000	'
Stated rate	4.88%	4.88%	'
Senior Notes | 4.75% Senior Notes Due December 2022	'	'	'
Debt Instrument [Line Items]	'	'	'
Total long-term debt	500,000,000	500,000,000	'
Stated rate	4.75%	4.75%	'
Bonds | 5% New York City Industrial Development Agency Bonds due September 2035	'	'	'
Debt Instrument [Line Items]	'	'	'
Total long-term debt	80,000,000	80,000,000	'
Stated rate	5.00%	5.00%	'
Revolving Credit Facility	'	'	'
Line of Credit Facility [Abstract]	'	'	'
Line of credit, maximum borrowing capacity	'	'	300,000,000
Line of credit, amount outstanding	$0	$0	'
Line of credit, commitment fee percentage	0.25%	'	'

ACCUMULATED_OTHER_COMPREHENSIV2

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance as of December 31	($13,046,000)	'
Net current period other comprehensive income	5,266,000	-13,399,000
Balance as of March 31	-7,697,000	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	600,000	800,000
Foreign Currency Translation Adjustment	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance as of December 31	-20,352,000	-25,073,000
Other comprehensive income before reclassifications, net of tax provision related to unrealized gains on available-for-sale securities	5,220,000	-6,951,000
Amounts reclassified from accumulated other comprehensive income	0	0
Net current period other comprehensive income	5,220,000	-6,951,000
Balance as of March 31	-15,132,000	-32,024,000
Unrealized Gains On Available-For-Sale Securities	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance as of December 31	7,306,000	-7,096,000
Other comprehensive income before reclassifications, net of tax provision related to unrealized gains on available-for-sale securities	129,000	-4,975,000
Amounts reclassified from accumulated other comprehensive income	0	-1,000
Net current period other comprehensive income	129,000	-4,976,000
Balance as of March 31	7,435,000	-12,072,000
Accumulated Other Comprehensive Income (Loss) [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Roll Forward]	'	'
Balance as of December 31	-13,046,000	-32,169,000
Other comprehensive income before reclassifications, net of tax provision related to unrealized gains on available-for-sale securities	5,349,000	-11,926,000
Amounts reclassified from accumulated other comprehensive income	0	-1,000
Net current period other comprehensive income	5,349,000	-11,927,000
Balance as of March 31	($7,697,000)	($44,096,000)

EARNINGS_PER_SHARE_Details

EARNINGS PER SHARE (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Numerator: Basic	'	'
Earnings from continuing operations	$34,305	$52,709
Net loss attributable to noncontrolling interests	2,394	1,872
Earnings from continuing operations attributable to IAC shareholders	36,699	54,581
Loss from discontinued operations attributable to IAC shareholders	-814	-944
Net earnings attributable to IAC shareholders	35,885	53,637
Numerator: Diluted	'	'
Earnings from continuing operations	34,305	52,709
Net loss attributable to noncontrolling interests	2,394	1,872
Earnings from continuing operations attributable to IAC shareholders	36,699	54,581
Loss from discontinued operations attributable to IAC shareholders	-814	-944
Net earnings attributable to IAC shareholders	$35,885	$53,637
Denominator: Basic	'	'
Weighted average basic shares outstanding	82,484	84,218
Denominator: Diluted	'	'
Weighted average basic shares outstanding	82,484	84,218
Dilutive securities including stock options and RSUs (in shares)	4,720	3,162
Denominator for earnings per share-weighted average shares (in shares)	87,204	87,380
Earnings (loss) per share attributable to IAC shareholders: Basic	'	'
Earnings per share from continuing operations (in dollars per share)	$0.44	$0.65
Discontinued operations (in dollars per share)	$0	($0.01)
Earnings per share (in dollars per share)	$0.44	$0.64
Earnings (loss) per share attributable to IAC shareholders: Diluted	'	'
Earnings per share from continuing operations (in dollars per share)	$0.42	$0.62
Discontinued operations (in dollars per share)	($0.01)	($0.01)
Earnings per share (in dollars per share)	$0.41	$0.61

EARNINGS_PER_SHARE_Details_2

EARNINGS PER SHARE (Details 2)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Anti-dilutive weighted average common shares	'	'
Dilutive securities including stock options and RSUs (in shares)	4,720,000	3,162,000
RSUs	'	'
Anti-dilutive weighted average common shares	'	'
Potentially dilutive securities excluded from calculation of diluted earnings per share (in shares)	0	3,400,000

SEGMENT_INFORMATION_Details

SEGMENT INFORMATION (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Segment reporting information	'	'
Revenue	$740,247	$742,249
Operating income	71,712	84,551
Adjusted EBITDA	108,095	126,766
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments	'	'
Non-Cash Compensation Expense	-9,613	-12,663
Depreciation	-14,818	-14,016
Amortization of Intangibles	-11,979	-14,078
Acquisition-related contingent consideration fair value adjustments	27	-1,458
Operating income	71,712	84,551
Search & Applications	'	'
Segment reporting information	'	'
Revenue	398,035	397,192
Operating income	70,337	86,983
Adjusted EBITDA	82,071	97,514
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments	'	'
Non-Cash Compensation Expense	0	-3
Depreciation	-4,465	-3,865
Amortization of Intangibles	-7,269	-6,663
Operating income	70,337	86,983
The Match Group	'	'
Segment reporting information	'	'
Revenue	211,187	192,875
Operating income	39,803	37,359
Adjusted EBITDA	47,430	47,906
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments	'	'
Non-Cash Compensation Expense	-17	157
Depreciation	-5,800	-4,706
Amortization of Intangibles	-1,837	-4,540
Acquisition-related contingent consideration fair value adjustments	27	-1,458
Operating income	39,803	37,359
Media	'	'
Segment reporting information	'	'
Revenue	36,355	44,995
Operating income	-8,566	-7,157
Adjusted EBITDA	-7,864	-6,180
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments	'	'
Non-Cash Compensation Expense	-164	-205
Depreciation	-282	-523
Amortization of Intangibles	-256	-249
Operating income	-8,566	-7,157
eCommerce	'	'
Segment reporting information	'	'
Revenue	94,842	107,297
Operating income	-1,561	-4,493
Adjusted EBITDA	2,804	723
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments	'	'
Non-Cash Compensation Expense	0	29
Depreciation	-1,748	-2,619
Amortization of Intangibles	-2,617	-2,626
Operating income	-1,561	-4,493
Corporate	'	'
Segment reporting information	'	'
Operating income	-28,301	-28,141
Adjusted EBITDA	-16,346	-13,197
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments	'	'
Non-Cash Compensation Expense	-9,432	-12,641
Depreciation	-2,523	-2,303
Operating income	-28,301	-28,141
Total Eliminations	'	'
Segment reporting information	'	'
Revenue	($172)	($110)

SEGMENT_INFORMATION_Details_2

SEGMENT INFORMATION (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Revenue and long-lived assets by geography	'	'	'
Revenue	$740,247	$742,249	'
Long-lived assets (excluding goodwill and intangible assets)	291,111	'	293,964
United States	'	'	'
Revenue and long-lived assets by geography	'	'	'
Revenue	504,403	514,614	'
Long-lived assets (excluding goodwill and intangible assets)	269,057	'	271,916
All Other Countries [Member]	'	'	'
Revenue and long-lived assets by geography	'	'	'
Revenue	235,844	227,635	'
Long-lived assets (excluding goodwill and intangible assets)	$22,054	'	$22,048

CONTINGENCIES_Details

CONTINGENCIES (Details)	3 Months Ended
	Mar. 31, 2014
	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_NONGUARANTOR_FIN2

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'	'	'
Cash and cash equivalents	$1,003,311	$1,100,444	$673,757	$749,977
Marketable securities	39,543	6,004	'	'
Accounts receivable, net	241,017	207,408	'	'
Other current assets	187,205	161,530	'	'
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	291,111	293,964	'	'
Goodwill	1,715,601	1,675,323	'	'
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	472,237	445,336	'	'
Other non-current assets	89,749	164,685	'	'
TOTAL ASSETS	4,224,056	4,234,684	'	'
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'	'	'
Accounts payable, trade	67,516	77,653	'	'
Long-term debt	1,080,000	1,080,000	'	'
Income taxes payable	420,256	416,384	'	'
Other long-term liabilities	61,706	58,393	'	'
Redeemable noncontrolling interests	25,885	42,861	'	'
IAC shareholders' equity	1,709,494	1,686,736	'	'
Noncontrolling interests	1,730	42,665	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,224,056	4,234,684	'	'
IAC	'	'	'	'
ASSETS	'	'	'	'
Cash and cash equivalents	670,607	782,022	430,356	501,075
Marketable securities	33,961	1,007	'	'
Accounts receivable, net	30	38	'	'
Other current assets	63,187	45,111	'	'
Intercompany receivables	0	0	'	'
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	5,108	5,316	'	'
Goodwill	0	0	'	'
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	0	0	'	'
Investment in subsidiaries	3,857,408	3,833,751	'	'
Other non-current assets	85,073	83,207	'	'
TOTAL ASSETS	4,715,374	4,750,452	'	'
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'	'	'
Accounts payable, trade	5,023	4,310	'	'
Other Liabilities, Current	40,684	41,623	'	'
Long-term debt	1,000,000	1,000,000	'	'
Income taxes payable	386,168	383,926	'	'
Intercompany liabilities	1,354,867	1,416,453	'	'
Other long-term liabilities	219,138	217,404	'	'
Redeemable noncontrolling interests	0	0	'	'
IAC shareholders' equity	1,709,494	1,686,736	'	'
Noncontrolling interests	0	0	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,715,374	4,750,452	'	'
Guarantor Subsidiaries	'	'	'	'
ASSETS	'	'	'	'
Cash and cash equivalents	0	0	0	0
Marketable securities	0	0	'	'
Accounts receivable, net	148,753	134,307	'	'
Other current assets	75,085	73,487	'	'
Intercompany receivables	524,844	564,999	'	'
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	218,643	220,756	'	'
Goodwill	1,185,760	1,180,159	'	'
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	293,311	301,513	'	'
Investment in subsidiaries	825,826	782,840	'	'
Other non-current assets	19,132	15,485	'	'
TOTAL ASSETS	3,291,354	3,273,546	'	'
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'	'	'
Accounts payable, trade	33,202	51,302	'	'
Other Liabilities, Current	269,022	254,882	'	'
Long-term debt	80,000	80,000	'	'
Income taxes payable	7,785	6,768	'	'
Intercompany liabilities	0	0	'	'
Other long-term liabilities	94,941	96,091	'	'
Redeemable noncontrolling interests	0	0	'	'
IAC shareholders' equity	2,806,404	2,784,503	'	'
Noncontrolling interests	0	0	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,291,354	3,273,546	'	'
Non-Guarantor Subsidiaries	'	'	'	'
ASSETS	'	'	'	'
Cash and cash equivalents	332,704	318,422	243,401	248,902
Marketable securities	5,582	4,997	'	'
Accounts receivable, net	92,234	73,063	'	'
Other current assets	49,977	43,746	'	'
Intercompany receivables	830,023	851,454	'	'
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	67,360	67,892	'	'
Goodwill	529,841	495,164	'	'
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	178,926	143,823	'	'
Investment in subsidiaries	0	0	'	'
Other non-current assets	175,914	252,612	'	'
TOTAL ASSETS	2,262,561	2,251,173	'	'
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'	'	'
Accounts payable, trade	29,291	22,041	'	'
Other Liabilities, Current	223,421	212,739	'	'
Long-term debt	0	0	'	'
Income taxes payable	26,303	25,690	'	'
Intercompany liabilities	0	0	'	'
Other long-term liabilities	79,101	73,089	'	'
Redeemable noncontrolling interests	25,885	42,861	'	'
IAC shareholders' equity	1,876,830	1,832,088	'	'
Noncontrolling interests	1,730	42,665	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,262,561	2,251,173	'	'
Total Eliminations	'	'	'	'
ASSETS	'	'	'	'
Cash and cash equivalents	0	0	0	0
Marketable securities	0	0	'	'
Accounts receivable, net	0	0	'	'
Other current assets	-1,044	-814	'	'
Intercompany receivables	-1,354,867	-1,416,453	'	'
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	0	0	'	'
Goodwill	0	0	'	'
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	0	0	'	'
Investment in subsidiaries	-4,683,234	-4,616,591	'	'
Other non-current assets	-6,088	-6,629	'	'
TOTAL ASSETS	-6,045,233	-6,040,487	'	'
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'	'	'
Accounts payable, trade	0	0	'	'
Other Liabilities, Current	0	0	'	'
Long-term debt	0	0	'	'
Income taxes payable	0	0	'	'
Intercompany liabilities	-1,354,867	-1,416,453	'	'
Other long-term liabilities	-7,132	-7,443	'	'
Redeemable noncontrolling interests	0	0	'	'
IAC shareholders' equity	-4,683,234	-4,616,591	'	'
Noncontrolling interests	0	0	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	-6,045,233	-6,040,487	'	'
IAC Consolidated	'	'	'	'
ASSETS	'	'	'	'
Cash and cash equivalents	1,003,311	1,100,444	673,757	749,977
Marketable securities	39,543	6,004	'	'
Accounts receivable, net	241,017	207,408	'	'
Other current assets	187,205	161,530	'	'
Intercompany receivables	0	0	'	'
Property and equipment, net of accumulated depreciation and amortization of $277,498 and $265,298, respectively	291,111	293,964	'	'
Goodwill	1,715,601	1,675,323	'	'
Intangible assets, net of accumulated amortization of $93,366 and $83,310, respectively	472,237	445,336	'	'
Investment in subsidiaries	0	0	'	'
Other non-current assets	274,031	344,675	'	'
TOTAL ASSETS	4,224,056	4,234,684	'	'
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'	'	'
Accounts payable, trade	67,516	77,653	'	'
Other Liabilities, Current	533,127	509,244	'	'
Long-term debt	1,080,000	1,080,000	'	'
Income taxes payable	420,256	416,384	'	'
Intercompany liabilities	0	0	'	'
Other long-term liabilities	386,048	379,141	'	'
Redeemable noncontrolling interests	25,885	42,861	'	'
IAC shareholders' equity	1,709,494	1,686,736	'	'
Noncontrolling interests	1,730	42,665	'	'
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$4,224,056	$4,234,684	'	'

GUARANTOR_AND_NONGUARANTOR_FIN3

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Condensed Financial Statements, Captions [Line Items]	'	'
Revenue	$740,247	$742,249
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	209,194	255,849
Selling and marketing expense	298,712	242,914
General and administrative expense	94,816	95,724
Product development expense	39,016	35,117
Depreciation	14,818	14,016
Amortization of intangibles	11,979	14,078
Total operating costs and expenses	668,535	657,698
Operating income	71,712	84,551
Equity in losses of unconsolidated affiliates	-1,935	-91
Interest expense	-14,064	-7,663
Other (expense) income, net	-23	1,658
Earnings from continuing operations before income taxes	55,690	78,455
Income tax provision	-21,385	-25,746
Earnings from continuing operations	34,305	52,709
Loss from discontinued operations, net of tax	-814	-944
Net earnings	33,491	51,765
Net loss attributable to noncontrolling interests	2,394	1,872
Net earnings attributable to IAC shareholders	35,885	53,637
Comprehensive income attributable to IAC shareholders	41,234	41,710
IAC	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Revenue	0	0
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	-28	677
Selling and marketing expense	192	431
General and administrative expense	22,446	22,245
Product development expense	1,471	899
Depreciation	329	367
Amortization of intangibles	0	0
Total operating costs and expenses	24,410	24,619
Operating income	-24,410	-24,619
Equity in losses of unconsolidated affiliates	54,259	114,550
Interest expense	-12,985	-6,557
Other (expense) income, net	9,699	-55,448
Earnings from continuing operations before income taxes	26,563	27,926
Income tax provision	10,136	26,655
Earnings from continuing operations	36,699	54,581
Loss from discontinued operations, net of tax	-814	-944
Net earnings	35,885	53,637
Net loss attributable to noncontrolling interests	0	0
Net earnings attributable to IAC shareholders	35,885	53,637
Comprehensive income attributable to IAC shareholders	41,234	41,710
Guarantor Subsidiaries	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Revenue	518,264	528,644
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	116,751	153,800
Selling and marketing expense	226,801	182,743
General and administrative expense	40,991	40,273
Product development expense	25,969	23,042
Depreciation	9,293	9,249
Amortization of intangibles	8,277	8,962
Total operating costs and expenses	428,082	418,069
Operating income	90,182	110,575
Equity in losses of unconsolidated affiliates	8,422	2,396
Interest expense	-1,042	-1,065
Other (expense) income, net	-8,751	-18,138
Earnings from continuing operations before income taxes	88,811	93,768
Income tax provision	-30,161	-33,806
Earnings from continuing operations	58,650	59,962
Loss from discontinued operations, net of tax	0	0
Net earnings	58,650	59,962
Net loss attributable to noncontrolling interests	0	8
Net earnings attributable to IAC shareholders	58,650	59,970
Comprehensive income attributable to IAC shareholders	59,032	59,895
Non-Guarantor Subsidiaries	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Revenue	223,587	214,642
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	93,431	102,151
Selling and marketing expense	72,035	59,997
General and administrative expense	31,366	33,207
Product development expense	11,917	11,176
Depreciation	5,196	4,400
Amortization of intangibles	3,702	5,116
Total operating costs and expenses	217,647	216,047
Operating income	5,940	-1,405
Equity in losses of unconsolidated affiliates	-27	-91
Interest expense	-37	-41
Other (expense) income, net	-971	75,244
Earnings from continuing operations before income taxes	4,905	73,707
Income tax provision	-1,360	-18,595
Earnings from continuing operations	3,545	55,112
Loss from discontinued operations, net of tax	-13	7
Net earnings	3,532	55,119
Net loss attributable to noncontrolling interests	2,394	1,864
Net earnings attributable to IAC shareholders	5,926	56,983
Comprehensive income attributable to IAC shareholders	9,622	40,890
Total Eliminations	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Revenue	-1,604	-1,037
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	-960	-779
Selling and marketing expense	-316	-257
General and administrative expense	13	-1
Product development expense	-341	0
Depreciation	0	0
Amortization of intangibles	0	0
Total operating costs and expenses	-1,604	-1,037
Operating income	0	0
Equity in losses of unconsolidated affiliates	-64,589	-116,946
Interest expense	0	0
Other (expense) income, net	0	0
Earnings from continuing operations before income taxes	-64,589	-116,946
Income tax provision	0	0
Earnings from continuing operations	-64,589	-116,946
Loss from discontinued operations, net of tax	13	-7
Net earnings	-64,576	-116,953
Net loss attributable to noncontrolling interests	0	0
Net earnings attributable to IAC shareholders	-64,576	-116,953
Comprehensive income attributable to IAC shareholders	-68,654	-100,785
IAC Consolidated	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Revenue	740,247	742,249
Operating costs and expenses:	'	'
Cost of revenue (exclusive of depreciation shown separately below)	209,194	255,849
Selling and marketing expense	298,712	242,914
General and administrative expense	94,816	95,724
Product development expense	39,016	35,117
Depreciation	14,818	14,016
Amortization of intangibles	11,979	14,078
Total operating costs and expenses	668,535	657,698
Operating income	71,712	84,551
Equity in losses of unconsolidated affiliates	-1,935	-91
Interest expense	-14,064	-7,663
Other (expense) income, net	-23	1,658
Earnings from continuing operations before income taxes	55,690	78,455
Income tax provision	-21,385	-25,746
Earnings from continuing operations	34,305	52,709
Loss from discontinued operations, net of tax	-814	-944
Net earnings	33,491	51,765
Net loss attributable to noncontrolling interests	2,394	1,872
Net earnings attributable to IAC shareholders	35,885	53,637
Comprehensive income attributable to IAC shareholders	$41,234	$41,710

GUARANTOR_AND_NONGUARANTOR_FIN4

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details3) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash (used in) provided by operating activities attributable to continuing operations	$42,704	$92,362
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	-77,981	-29,194
Capital expenditures	-9,721	-33,638
Proceeds from maturities and sales of marketable debt securities	0	12,500
Purchases of marketable debt securities	-32,848	0
Purchases of long-term investments	-7,861	-975
Other, net	-157	-837
Net cash used in investing activities attributable to continuing operations	-128,568	-52,144
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	0	-88,605
Issuance of common stock, net of withholding taxes	920	552
Dividends	-20,004	-21,429
Excess tax benefits from stock-based awards	24,203	12,530
Principal payments on long-term debt	0	-15,844
Payments to Noncontrolling Interests	-30,000	0
Funds returned from escrow for Meetic tender offer	12,354	0
Other, net	-295	-1,101
Net cash used in financing activities attributable to continuing operations	-12,822	-113,897
Total cash used in continuing operations	-98,686	-73,679
Total cash (used in) provided by discontinued operations	-63	2,425
Effect of exchange rate changes on cash and cash equivalents	1,616	-4,966
Net decrease in cash and cash equivalents	-97,133	-76,220
Cash and cash equivalents at beginning of period	1,100,444	749,977
Cash and cash equivalents at end of period	1,003,311	673,757
IAC	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash (used in) provided by operating activities attributable to continuing operations	-29,250	-1,106
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	0	0
Capital expenditures	-985	-78
Proceeds from maturities and sales of marketable debt securities	'	12,500
Purchases of marketable debt securities	-32,848	'
Purchases of long-term investments	-3,000	0
Other, net	2	-55
Net cash used in investing activities attributable to continuing operations	-36,831	12,367
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	'	-88,605
Issuance of common stock, net of withholding taxes	920	552
Dividends	-20,004	-21,429
Excess tax benefits from stock-based awards	15,610	12,530
Principal payments on long-term debt	'	-15,844
Payments to Noncontrolling Interests	0	'
Funds returned from escrow for Meetic tender offer	0	'
Intercompany Financing Activites	-41,436	29,317
Other, net	-374	-927
Net cash used in financing activities attributable to continuing operations	-45,284	-84,406
Total cash used in continuing operations	-111,365	-73,145
Total cash (used in) provided by discontinued operations	-50	2,426
Effect of exchange rate changes on cash and cash equivalents	0	0
Net decrease in cash and cash equivalents	-111,415	-70,719
Cash and cash equivalents at beginning of period	782,022	501,075
Cash and cash equivalents at end of period	670,607	430,356
Guarantor Subsidiaries	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash (used in) provided by operating activities attributable to continuing operations	73,160	106,037
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	-51,263	-6,060
Capital expenditures	-5,661	-28,920
Proceeds from maturities and sales of marketable debt securities	'	0
Purchases of marketable debt securities	0	'
Purchases of long-term investments	-3,286	0
Other, net	0	0
Net cash used in investing activities attributable to continuing operations	-60,210	-34,980
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	'	'
Issuance of common stock, net of withholding taxes	'	'
Dividends	'	'
Excess tax benefits from stock-based awards	'	'
Principal payments on long-term debt	'	0
Payments to Noncontrolling Interests	-30,000	'
Funds returned from escrow for Meetic tender offer	0	'
Intercompany Financing Activites	17,051	-71,056
Other, net	'	-29
Net cash used in financing activities attributable to continuing operations	-12,949	-71,085
Total cash used in continuing operations	1	-28
Total cash (used in) provided by discontinued operations	'	'
Effect of exchange rate changes on cash and cash equivalents	-1	28
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Non-Guarantor Subsidiaries	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash (used in) provided by operating activities attributable to continuing operations	-1,206	-12,569
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	-26,718	-23,134
Capital expenditures	-3,075	-4,640
Proceeds from maturities and sales of marketable debt securities	'	0
Purchases of marketable debt securities	0	'
Purchases of long-term investments	-1,575	-975
Other, net	-159	-782
Net cash used in investing activities attributable to continuing operations	-31,527	-29,531
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	'	'
Issuance of common stock, net of withholding taxes	'	'
Dividends	'	'
Excess tax benefits from stock-based awards	8,593	'
Principal payments on long-term debt	'	0
Payments to Noncontrolling Interests	0	'
Funds returned from escrow for Meetic tender offer	12,354	'
Intercompany Financing Activites	24,385	41,739
Other, net	79	-145
Net cash used in financing activities attributable to continuing operations	45,411	41,594
Total cash used in continuing operations	12,678	-506
Total cash (used in) provided by discontinued operations	-13	-1
Effect of exchange rate changes on cash and cash equivalents	1,617	-4,994
Net decrease in cash and cash equivalents	14,282	-5,501
Cash and cash equivalents at beginning of period	318,422	248,902
Cash and cash equivalents at end of period	332,704	243,401
Total Eliminations	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash (used in) provided by operating activities attributable to continuing operations	0	0
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	0	0
Capital expenditures	0	0
Proceeds from maturities and sales of marketable debt securities	'	0
Purchases of marketable debt securities	0	'
Purchases of long-term investments	0	0
Other, net	0	0
Net cash used in investing activities attributable to continuing operations	0	0
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	'	0
Issuance of common stock, net of withholding taxes	0	0
Dividends	0	0
Excess tax benefits from stock-based awards	0	0
Principal payments on long-term debt	'	0
Payments to Noncontrolling Interests	0	'
Funds returned from escrow for Meetic tender offer	0	'
Intercompany Financing Activites	0	0
Other, net	0	0
Net cash used in financing activities attributable to continuing operations	0	0
Total cash used in continuing operations	0	0
Total cash (used in) provided by discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
IAC Consolidated	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Net cash (used in) provided by operating activities attributable to continuing operations	42,704	92,362
Cash flows from investing activities attributable to continuing operations:	'	'
Acquisitions, net of cash acquired	-77,981	-29,194
Capital expenditures	-9,721	-33,638
Proceeds from maturities and sales of marketable debt securities	'	12,500
Purchases of marketable debt securities	-32,848	'
Purchases of long-term investments	-7,861	-975
Other, net	-157	-837
Net cash used in investing activities attributable to continuing operations	-128,568	-52,144
Cash flows from financing activities attributable to continuing operations:	'	'
Purchase of treasury stock	'	-88,605
Issuance of common stock, net of withholding taxes	920	552
Dividends	-20,004	-21,429
Excess tax benefits from stock-based awards	24,203	12,530
Principal payments on long-term debt	'	-15,844
Payments to Noncontrolling Interests	-30,000	'
Funds returned from escrow for Meetic tender offer	12,354	'
Intercompany Financing Activites	0	0
Other, net	-295	-1,101
Net cash used in financing activities attributable to continuing operations	-12,822	-113,897
Total cash used in continuing operations	-98,686	-73,679
Total cash (used in) provided by discontinued operations	-63	2,425
Effect of exchange rate changes on cash and cash equivalents	1,616	-4,966
Net decrease in cash and cash equivalents	-97,133	-76,220
Cash and cash equivalents at beginning of period	1,100,444	749,977
Cash and cash equivalents at end of period	$1,003,311	$673,757