Match (MTCH) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

DOCUMENT AND ENTITY INFORMATION

DOCUMENT AND ENTITY INFORMATION - shares	6 Months Ended
	Jun. 30, 2018	Aug. 06, 2018
Entity Registrant Name	IAC/INTERACTIVECORP
Entity Central Index Key	891,103
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Class A
Entity Common Stock, Shares Outstanding		77,427,724
Class B Convertible Common Stock
Entity Common Stock, Shares Outstanding		5,789,499

CONSOLIDATED BALANCE SHEET (Una

CONSOLIDATED BALANCE SHEET (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 1,644,829	$ 1,630,809
Marketable securities	120,410	4,995
Accounts receivable, net of allowance of $17,960 and $11,489, respectively	343,576	304,027
Other current assets	237,957	185,374
Total current assets	2,346,772	2,125,205
Property and equipment, net of accumulated depreciation and amortization of $285,482 and $271,811, respectively	306,602	315,170
Goodwill	2,578,296	2,559,066
Intangible assets, net of accumulated amortization of $113,117 and $74,957, respectively	636,351	663,737
Long-term investments	217,357	64,977
Deferred income taxes	62,245	66,321
Other non-current assets	87,661	73,334
TOTAL ASSETS	6,235,284	5,867,810
LIABILITIES:
Current portion of long-term debt	13,750	13,750
Accounts payable, trade	79,107	76,571
Deferred revenue	375,138	342,483
Accrued expenses and other current liabilities	377,685	366,924
Total current liabilities	845,680	799,728
Long-term debt, net	1,982,271	1,979,469
Income taxes payable	23,942	25,624
Deferred income taxes	35,550	35,070
Other long-term liabilities	35,174	38,229
Redeemable noncontrolling interests	75,719	42,867
Commitments and contingencies
SHAREHOLDERS' EQUITY:
Additional paid-in capital	12,008,684	12,165,002
Retained earnings	921,268	595,038
Accumulated other comprehensive loss	(112,717)	(103,568)
Treasury stock 194,261 and 194,163 shares, respectively	(10,241,434)	(10,226,721)
Total IAC shareholders' equity	2,576,079	2,430,028
Noncontrolling interests	660,869	516,795
Total shareholders' equity	3,236,948	2,946,823
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	6,235,284	5,867,810
Common stock $.001 par value; authorized 1,600,000 shares; issued 261,757 and 260,624 shares, respectively, and outstanding 77,865 and 76,829 shares, respectively
SHAREHOLDERS' EQUITY:
Common stock	262	261
Class B convertible common stock $.001 par value; authorized 400,000 shares; issued 16,157 shares and outstanding 5,789 shares
SHAREHOLDERS' EQUITY:
Common stock	$ 16	$ 16

CONSOLIDATED BALANCE SHEET (Un3

CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Allowance for accounts receivable	$ 17,960	$ 11,489
Accumulated depreciation and amortization of property and equipment	285,482	271,811
Accumulated amortization of intangible assets	$ 113,117	$ 74,957
Treasury stock (shares)	194,261,000	194,163,000
Common stock $.001 par value; authorized 1,600,000 shares; issued 261,757 and 260,624 shares, respectively, and outstanding 77,865 and 76,829 shares, respectively
Par value of common stock (USD per share)	$ 0.001	$ 0.001
Common stock authorized (shares)	1,600,000,000	1,600,000,000
Common stock issued (shares)	261,757,000	260,624,000
Common stock outstanding (shares)	77,865,000	76,829,000
Class B convertible common stock $.001 par value; authorized 400,000 shares; issued 16,157 shares and outstanding 5,789 shares
Par value of common stock (USD per share)	$ 0.001	$ 0.001
Common stock authorized (shares)	400,000,000	400,000,000
Common stock issued (shares)	16,157,000	16,157,000
Common stock outstanding (shares)	5,789,000	5,789,000

CONSOLIDATED STATEMENT OF OPERA

CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue	$ 1,059,122	$ 767,387	$ 2,054,197	$ 1,528,220
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	218,224	139,033	420,186	284,991
Selling and marketing expense	369,660	320,104	772,492	670,515
General and administrative expense	188,363	150,222	372,547	293,817
Product development expense	75,445	55,430	152,382	110,190
Depreciation	18,805	18,339	38,062	38,227
Amortization of intangibles	20,188	8,624	40,141	17,785
Total operating costs and expenses	890,685	691,752	1,795,810	1,415,525
Operating income	168,437	75,635	258,387	112,695
Interest expense	(27,356)	(24,728)	(53,861)	(49,520)
Other income, net	171,141	10,230	166,522	2,516
Earnings before income taxes	312,222	61,137	371,048	65,691
Income tax (provision) benefit	(31,368)	19,420	(2,355)	43,329
Net earnings	280,854	80,557	368,693	109,020
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Net earnings attributable to IAC shareholders	$ 218,353	$ 66,268	$ 289,435	$ 92,477
Per share information attributable to IAC shareholders:
Basic earnings per share (USD per share)	$ 2.61	$ 0.84	$ 3.47	$ 1.18
Diluted earnings per share (USD per share)	$ 2.32	$ 0.70	$ 3.05	$ 0.99
Stock-based compensation expense by function:
Stock-based compensation expense	$ 57,561	$ 38,915	$ 116,643	$ 72,890
Cost of revenue
Stock-based compensation expense by function:
Stock-based compensation expense	715	473	1,425	975
Selling and marketing expense
Stock-based compensation expense by function:
Stock-based compensation expense	2,077	1,643	3,842	3,450
General and administrative expense
Stock-based compensation expense by function:
Stock-based compensation expense	44,875	31,751	90,501	58,691
Product development expense
Stock-based compensation expense by function:
Stock-based compensation expense	$ 9,894	$ 5,048	$ 20,875	$ 9,774

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 280,854	$ 80,557	$ 368,693	$ 109,020
Other comprehensive income, net of tax:
Change in foreign currency translation adjustment	(46,576)	18,788	(11,183)	40,698
Change in unrealized gains and losses of available-for-sale securities (net of tax provision of $4 for both the three and six months ended June 30, 2018, and net of tax benefit of $3,846 for both the three and six months ended June 30, 2017)	13	(4,028)	13	(4,026)
Total other comprehensive (loss) income	(46,563)	14,760	(11,170)	36,672
Comprehensive income, net of tax	234,291	95,317	357,523	145,692
Components of comprehensive income attributable to noncontrolling interests:
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Change in foreign currency translation adjustment attributable to noncontrolling interests	9,119	(4,153)	2,083	(7,287)
Comprehensive income attributable to noncontrolling interests	(53,382)	(18,442)	(77,175)	(23,830)
Comprehensive income attributable to IAC shareholders	$ 180,909	$ 76,875	$ 280,348	$ 121,862

CONSOLIDATED STATEMENT OF COMP6

CONSOLIDATED STATEMENT OF COMPREHENSIVE OPERATIONS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Tax provision (benefit) of change in unrealized gains and losses of available-for-sale securities	$ 4	$ (3,846)	$ 4	$ (3,846)

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interests	Total IAC Shareholders' Equity	Common StockCommon Stock $.001 Par Value	Common StockClass B Convertible Common Stock $.001 Par Value	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests	Match Group	Match GroupTotal IAC Shareholders' Equity	Match GroupAdditional Paid-in Capital	Match GroupAccumulated Other Comprehensive Loss	Match GroupNoncontrolling Interests	ANGI Homeservices	ANGI HomeservicesTotal IAC Shareholders' Equity	ANGI HomeservicesAdditional Paid-in Capital	ANGI HomeservicesAccumulated Other Comprehensive Loss	ANGI HomeservicesNoncontrolling Interests
Increase (Decrease) in Shareholders' Equity
Cumulative effect of adoption of ASU No. 2014-09	$ 40,205		$ 36,795				$ 36,795			$ 3,410
Balance at beginning of period at Dec. 31, 2017	42,867	$ 42,867
Increase (Decrease) in Redeemable Noncontrolling Interests
Net earnings		34,756
Other comprehensive loss, net of tax		(286)
Stock-based compensation expense		800
Purchase of redeemable noncontrolling interests		(59)
Adjustment of redeemable noncontrolling interests to fair value		1,849
Noncontrolling interests created in acquisitions		2,261														$ 14,246				$ 14,246
Other		(6,469)
Balance at end of period at Jun. 30, 2018	75,719	75,719
Balance at beginning of period at Dec. 31, 2017	2,946,823		2,430,028	$ 261	$ 16	$ 12,165,002	595,038	$ (103,568)	$ (10,226,721)	516,795
Balance at beginning of period (shares) at Dec. 31, 2017				260,624,000	16,157,000
Increase (Decrease) in Shareholders' Equity
Net earnings	333,937		289,435				289,435			44,502
Other comprehensive loss, net of tax	(10,884)		(9,087)					(9,087)		(1,797)
Stock-based compensation expense	115,843		36,015			36,015				79,828
Issuance of common stock pursuant to stock-based awards, net of withholding taxes	25,891		25,891	$ 1		25,890
Issuance of common stock pursuant to stock-based awards, net of withholding taxes (in shares)				1,133,000
Purchase of treasury stock	(14,713)		(14,713)						(14,713)
Purchase of noncontrolling interests	(818)									(818)
Adjustment of redeemable noncontrolling interests to fair value	(1,849)		(1,849)			(1,849)
Issuance of common stock pursuant to stock-based awards, net of withholding taxes, and impact to noncontrolling interests											$ (195,094)	$ (194,809)	$ (194,764)	$ (45)	$ (285)	(19,290)	$ (24,019)	$ (24,002)	$ (17)	4,729
Noncontrolling interests created in acquisitions		$ 2,261														$ 14,246				$ 14,246
Other	2,651		2,392			2,392				259
Balance at end of period at Jun. 30, 2018	$ 3,236,948		$ 2,576,079	$ 262	$ 16	$ 12,008,684	$ 921,268	$ (112,717)	$ (10,241,434)	$ 660,869
Balance at end of period (shares) at Jun. 30, 2018				261,757,000	16,157,000

CONSOLIDATED STATEMENT OF SHAR8

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical)	Jun. 30, 2018$ / shares
Common Stock $.001 Par Value
Par value of common stock (USD per share)	$ 0.001
Class B Convertible Common Stock $.001 Par Value
Par value of common stock (USD per share)	0.001
Common Stock | Common Stock $.001 Par Value
Par value of common stock (USD per share)	0.001
Common Stock | Class B Convertible Common Stock $.001 Par Value
Par value of common stock (USD per share)	$ 0.001

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net earnings	$ 368,693	$ 109,020
Adjustments to reconcile net earnings to net cash provided by operating activities:
Stock-based compensation expense	116,643	72,890
Depreciation	38,062	38,227
Amortization of intangibles	40,141	17,785
Bad debt expense	20,865	14,024
Deferred income taxes	(11,258)	6,580
Unrealized gains on equity securities, net	(126,559)	0
Gains from the sale of investments and businesses, net	(27,172)	(19,663)
Other adjustments, net	8,591	18,283
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Accounts receivable	(60,185)	(22,799)
Other assets	(38,195)	(18,482)
Accounts payable and other liabilities	1,063	(13,650)
Income taxes payable and receivable	3,467	(59,735)
Deferred revenue	45,646	15,234
Net cash provided by operating activities	379,802	157,714
Cash flows from investing activities:
Acquisitions, net of cash acquired	(17,513)	(49,164)
Capital expenditures	(39,696)	(41,821)
Proceeds from maturities and sales of marketable debt securities	10,000	99,350
Purchases of marketable debt securities	(124,397)	(24,909)
Purchases of investments	(31,180)	(5,105)
Net proceeds from the sale of investments and businesses	27,540	119,697
Other, net	9,599	1,076
Net cash (used in) provided by investing activities	(165,647)	99,124
Cash flows from financing activities:
Purchase of noncontrolling interests	(877)	(12,361)
Acquisition-related contingent consideration payments	(185)	(3,860)
Other, net	(4,813)	(4,873)
Net cash used in financing activities	(202,705)	(99,880)
Total cash provided	11,450	156,958
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	44	5,474
Net increase in cash, cash equivalents, and restricted cash	11,494	162,432
Cash, cash equivalents, and restricted cash at beginning of period	1,633,682	1,360,199
Cash, cash equivalents, and restricted cash at end of period	1,645,176	1,522,631
Match Group and ANGI Homeservices
Cash flows from financing activities:
Proceeds from the exercise of stock options	2,125	39,403
Withholding taxes paid on behalf of employees on net settled stock-based awards	(136,727)	(28,421)
ANGI Homeservices
Cash flows from financing activities:
Principal payments on ANGI Homeservices debt	(6,875)	0
Match Group
Cash flows from financing activities:
Purchase of treasury stock	(73,943)	0
IAC/InterActiveCorp
Cash flows from financing activities:
Repurchases of IAC debt	(363)	(31,590)
Purchase of treasury stock	(7,869)	(56,424)
Proceeds from the exercise of stock options	27,317	48,146
Withholding taxes paid on behalf of employees on net settled stock-based awards	$ (495)	$ (49,900)

THE COMPANY AND SUMMARY OF SIGN

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Jun. 30, 2018
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 composed of widely known consumer brands, such as Tinder, Match, PlentyOfFish and OkCupid, which are part of Match Group's online dating portfolio, and HomeAdvisor and Angie's List, which are operated by ANGI Homeservices, as well as Vimeo, Dotdash, Dictionary.com, The Daily Beast and Investopedia. All references to "IAC," the "Company," "we," "our" or "us" in this report are to IAC/InterActiveCorp. As of June 30, 2018 , IAC’s economic and voting interest in Match Group were 81.2% , and 97.6% , respectively. All references to "Match Group" or "MTCH" in this report are to Match Group, Inc. As of June 30, 2018 , IAC’s economic and voting interest in ANGI Homeservices were 86.4% , and 98.5% , respectively. All reference to "ANGI Homeservices" or "ANGI" in this report are to ANGI Homeservices Inc. Basis of Consolidation and Accounting for Investments The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP"). 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. Investments in equity securities, other than those of our consolidated subsidiaries and those accounted for under the equity method, are accounted for at fair value or under the measurement alternative upon the adoption of Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities , on January 1, 2018, with changes recognized within other income (expense), net each reporting period. Under the measurement alternative, equity investments without readily determinable fair values are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. Under the measurement alternative, the value of our equity securities without determinable fair values is generally determined based on a market approach as of the transaction date. An investment will be considered identical or similar if it has identical or similar rights to the equity investments held by the Company. The Company reviews impairment of our equity securities each reporting period when there are qualitative indicators that may indicate impairment. Once the qualitative indicators are identified and the fair value of the security is less than its carrying value, the Company will write down the security to its fair value and record the corresponding charge within other income (expense), net. See " Accounting Pronouncements adopted by the Company" below for further information. In management's opinion, the unaudited interim consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and reflect all adjustments, consisting of normal and recurring adjustments, necessary for the fair presentation of our financial position, results of operations and cash flows for the periods presented. Interim results are not necessarily indicative of the results that may be expected for the full year. The accompanying unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017. Accounting Estimates Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its consolidated financial statements in accordance with GAAP. These estimates, judgments and assumptions 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 recoverability of goodwill and indefinite-lived intangible assets; the useful lives and recoverability of definite-lived intangible assets and property and equipment; the fair values of marketable debt securities and equity securities without readily determinable fair values; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; the fair value of acquisition-related contingent consideration arrangements; unrecognized tax benefits; 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 meaningful 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"). The services agreement became effective on April 1, 2016, following the expiration of the previous services agreement, and expires on March 31, 2020; however, the Company may choose to terminate the agreement effective March 31, 2019. The services agreement requires that the Company comply with certain guidelines promulgated by Google. Google may generally unilaterally update its policies and guidelines without advance notice, which could in turn 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. Google recently announced policy changes related to its Chrome browser, effective in September 2018, which could hurt the distribution of our desktop products through the Chrome Web Store and could impact revenue and profits of some of the businesses within our Applications segment. For the three and six months ended June 30, 2018 , revenue earned from Google was $204.9 million and $416.2 million , representing 19% and 20% , respectively, of the Company's consolidated revenue. For the three and six months ended June 30, 2017 , revenue earned from Google was $174.6 million and $362.4 million , representing 23% and 24% , respectively, of the Company's consolidated revenue. This revenue is earned principally by the businesses comprising the Applications and Publishing segments. For the three and six months ended June 30, 2018 , revenue earned from Google represents 75% and 79% , respectively, of Applications revenue and 71% and 73% , respectively, of Publishing revenue. For both the three and six months ended June 30, 2017, revenue earned from Google represented 83% of Applications revenue and 70% of Publishing revenue. Accounts receivable related to revenue earned from Google totaled $73.4 million and $72.4 million at June 30, 2018 and December 31, 2017 , respectively. Recent Accounting Pronouncements Accounting Pronouncements adopted by the Company In May 2014, the FASB ASU No. 2014-09, Revenue from Contracts with Customers . ASU No. 2014-09 supersedes nearly all existing revenue recognition guidance under GAAP. The Company adopted ASU No. 2014-09 effective January 1, 2018 using the modified retrospective transition method for open contracts as of the date of initial application. The cumulative impact to the Company's retained earnings at January 1, 2018 was $40.2 million , of which $3.4 million was related to the Company's noncontrolling interest in ANGI; the adjustment to retained earnings was principally related to the Company’s ANGI Homeservices and Applications segments. • Within ANGI, the effect of the adoption of ASU No. 2014-09 is that commissions paid to employees pursuant to certain sales incentive programs, which represent the incremental direct costs of obtaining a service professional contract, are now capitalized and amortized over the estimated life of a service professional (also referred to as the estimated customer relationship period). These costs were expensed as incurred prior to January 1, 2018. The cumulative effect of the adoption of ASU No. 2014-09 was the establishment of a current and non-current asset for capitalized sales commissions of $29.7 million and $4.2 million , respectively, and a related deferred tax liability of $8.0 million , resulting in a net increase to retained earnings of $25.9 million on January 1, 2018. • Within Applications, the primary effect of the adoption of ASU No. 2014-09 is to accelerate the recognition of the portion of the revenue of certain desktop applications sold by SlimWare that qualifies as functional intellectual property ("functional IP") under ASU No. 2014-09. This revenue was previously deferred and recognized over the applicable subscription term. The cumulative effect of the adoption of ASU No. 2014-09 for SlimWare was a reduction in deferred revenue of $20.3 million and the establishment of a deferred tax liability of $4.9 million , resulting in a net increase to retained earnings of $15.5 million on January 1, 2018. The adoption of ASU No. 2014-09 will not have a material effect on the Company’s results of operations for the year ending December 31, 2018. See " Note 2—Revenue Recognition " for additional information on the impact to the Company. The Company's disaggregated revenue disclosures are presented in " Note 10—Segment information ." The following tables present the impact of the adoption of ASU No. 2014-09 by segment under Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers , as reported, and ASC 605, Revenue Recognition , for the three and six months ended June 30, 2018. Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Revenue by segment: Match Group $ 421,196 $ 421,196 $ — $ 828,563 $ 828,563 $ — ANGI Homeservices 294,822 294,822 — 550,133 550,133 — Video 62,757 63,018 (261 ) 128,919 129,609 (690 ) Applications 143,074 144,842 (1,768 ) 275,061 276,359 (1,298 ) Publishing 137,355 137,355 — 271,677 271,677 — Inter-segment eliminations (82 ) (82 ) — (156 ) (156 ) — Total $ 1,059,122 $ 1,061,151 $ (2,029 ) $ 2,054,197 $ 2,056,185 $ (1,988 ) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Operating costs and expenses by segment: Match Group $ 271,031 $ 271,031 $ — $ 566,165 $ 566,165 $ — ANGI Homeservices 271,560 273,678 (2,118 ) 537,627 545,838 (8,211 ) Video 77,739 77,739 — 159,776 160,003 (227 ) Applications 109,997 109,291 706 216,523 215,298 1,225 Publishing 124,548 124,548 — 243,059 243,059 — Corporate 35,810 35,810 — 72,660 72,660 — Total $ 890,685 $ 892,097 $ (1,412 ) $ 1,795,810 $ 1,803,023 $ (7,213 ) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Operating income (loss) by segment: Match Group $ 150,165 $ 150,165 $ — $ 262,398 $ 262,398 $ — ANGI Homeservices 23,262 21,144 2,118 12,506 4,295 8,211 Video (14,982 ) (14,721 ) (261 ) (30,857 ) (30,394 ) (463 ) Applications 33,077 35,551 (2,474 ) 58,538 61,061 (2,523 ) Publishing 12,807 12,807 — 28,618 28,618 — Corporate (35,892 ) (35,892 ) — (72,816 ) (72,816 ) — Total $ 168,437 $ 169,054 $ (617 ) $ 258,387 $ 253,162 $ 5,225 Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Net earnings $ 280,854 $ 281,269 $ (415 ) $ 368,693 $ 364,786 $ 3,907 In January 2016, the FASB issued ASU No. 2016-01, which updates certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Under ASU No. 2016-01, equity securities, other than those of our consolidated subsidiaries and those accounted for under the equity method, will be measured at fair value with changes in fair value recognized in the statement of operations each reporting period. ASU No. 2016-01 is effective for reporting periods beginning after December 15, 2017. There was no cumulative impact to the Company's consolidated financial statements upon adoption of ASU No. 2016-01 on January 1, 2018. The adoption of ASU No. 2016-01 increases the volatility of the Company's other income (expense), net as a result of the remeasurement of these instruments. For the three and six months ended June 30, 2018 , other income, net includes net unrealized gains related to certain equity securities that were adjusted to fair value in accordance with ASU No. 2016-01 of $126.4 million and $126.6 million , respectively. See " Note 6—Fair Value Measurements and Financial Instruments " for additional information. In November 2016, the FASB issued ASU No. 2016-18, Restricted Cash , which requires companies to explain the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. Therefore, amounts generally described as restricted cash or restricted cash equivalents are combined with unrestricted cash and cash equivalents when reconciling the beginning and end of period balances on the statement of cash flows. ASU No. 2016-18 also requires companies to disclose the nature of their restricted cash and restricted cash equivalents balances. Additionally, when cash, cash equivalents, restricted cash, and restricted cash equivalents are presented within different captions on the balance sheet, a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet is required. ASU No. 2016-18 is effective for reporting periods beginning after December 15, 2017. The Company's adoption of ASU No. 2016-18 effective January 1, 2018, on a retrospective basis, did not have a material effect on its consolidated financial statements. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheet to the total amounts shown in the consolidated statement of cash flows: June 30, 2018 December 31, 2017 June 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 1,644,829 $ 1,630,809 $ 1,522,300 $ 1,329,187 Restricted cash included in other current assets 347 2,873 331 20,464 Restricted cash included in other assets — — — 10,548 Total cash, cash equivalents and restricted cash as shown on the consolidated statement of cash flows $ 1,645,176 $ 1,633,682 $ 1,522,631 $ 1,360,199 Restricted cash at December 31, 2017 primarily supports a letter of credit to a supplier, which was released to the Company in the second quarter of 2018. Restricted cash at December 31, 2016 primarily included funds held in escrow for the redemption and repurchase of IAC Senior Notes and the MyHammer tender offer. In the first quarter of 2017, the Senior Notes were redeemed and repurchased and the funds held in escrow for the MyHammer tender offer were returned to the Company. In June 2018, the FASB issued ASU No. 2018-07, Improvements to Nonemployee Share-Based Payment Accounting , which largely aligns the measurement and classification guidance for share-based payments granted to non-employees with the guidance for share-based payments granted to employees. The new guidance supersedes Subtopic 505-50, Equity - Equity-Based payments to Nonemployees . ASU No. 2018-07 is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The Company adopted ASU No. 2018-07 effective April 1, 2018 and its adoption did not have a material effect on its consolidated financial statements. The effect of the adoption of ASU No. 2018-07 will be to minimize the volatility of expense related to stock-based awards to non-employees in the future. Accounting Pronouncement not yet adopted by the Company In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) , which supersedes existing guidance on accounting for leases in "Leases (Topic 840)" and generally requires all leases to be recognized in the statement of financial position. The provisions of ASU No. 2016-02 are effective for reporting periods beginning after December 15, 2018; early adoption is permitted. In July 2018, the FASB issued ASU No. 2018-11, which provides the option of an additional transition method that allows entities to initially apply the new lease guidance at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company expects to implement the transition method option provided by ASU No. 2018-11. The Company will adopt the new lease guidance effective January 1, 2019. The Company is not a lessor, has no capitalized leases and does not expect to enter into any capitalized leases prior to the adoption of ASU No. 2016-02. Accordingly, the Company does not expect the amount or classification of rent expense in its statement of operations to be affected by the adoption of ASU No. 2016-02. The primary effect of the adoption of ASU No. 2016-02 will be the recognition of a right of use asset and related liability to reflect the Company's rights and obligations under its operating leases. The Company will also be required to provide the additional disclosures stipulated in ASU No. 2016-02. The adoption of ASU No. 2016-02 will not have an impact on the leverage calculation set forth in any of the agreements governing the outstanding debt of the Company or its MTCH and ANGI subsidiaries, or our credit agreement or the credit agreement of MTCH because, in each circumstance, the leverage calculations are not affected by the liability that will be recorded upon adoption of the new standard. While the Company's evaluation of the impact of the adoption of ASU No. 2016-02 on its consolidated financial statements continues, outlined below is a summary of the status of the Company's progress: • the Company has selected a software package to assist in the determination of the right of use asset and related liability as of January 1, 2019 and to provide the required information following the adoption; • the Company has prepared summaries of its leases for input into the software package; • the Company is assessing the other inputs required in connection with the adoption of ASU No. 2016-02; and • the Company is developing its accounting policy, procedures and controls related to the new standard. The Company does not expect to have a preliminary estimate of the right of use asset and related liability as of the adoption date until the fourth quarter of 2018. Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.

REVENUE RECOGNITION

REVENUE RECOGNITION	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION General Revenue Recognition The Company accounts for a contract when it has approval and commitment from all parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when control of the promised services or goods is transferred to our customers, and in an amount that reflects the consideration the Company is contractually due in exchange for those services or goods. Match Group Match Group’s revenue is primarily derived directly from users in the form of recurring subscriptions. Subscription revenue is presented net of credits and credit card chargebacks. Subscribers pay in advance, primarily by credit card or through mobile app stores, and, subject to certain conditions identified in our terms and conditions, generally all purchases are final and nonrefundable. Revenue is initially deferred and is recognized using the straight-line method over the term of the applicable subscription period, which primarily range from one to six months. Revenue is also earned from online advertising, the purchase of à la carte features and offline events. Online advertising revenue is recognized when an advertisement is displayed. Revenue from the purchase of à la carte features is recognized based on usage. Revenue associated with offline events is recognized when each event occurs. ANGI Homeservices ANGI revenue is primarily derived from (i) consumer connection revenue, which comprises fees paid by service professionals for consumer matches (regardless of whether the professional ultimately provides the requested service), and (ii) membership subscription fees paid by service professionals. Consumer connection revenue varies based upon several factors, including the service requested, type of match and geographic location of service. The Company’s consumer connection revenue is generated and recognized when an in-network service professional is delivered a consumer match. Membership subscription revenue from service professionals is initially deferred and is recognized using the straight-line method over the applicable subscription period, which is typically one year. Consumer connection revenue is generally billed one week following a consumer match; with payment due upon receipt of invoice. ANGI revenue is also derived from Angie's List (i) sales of time-based website, mobile and call center advertising to service professionals and (ii) membership subscription fees from consumers. Angie's List service professionals generally pay for advertisements in advance on a monthly or annual basis at the option of the service professional, with the average advertising contract term being approximately one year. Angie's List website, mobile and call center advertising revenue is recognized ratably over the contract term. Revenue from the sale of advertising in the Angie’s List Magazine is recognized in the period in which the publication is distributed. Angie's List prepaid consumer membership subscription fees are recognized as revenue using the straight-line method over the term of the applicable subscription period, which is typically one year. Video Revenue of businesses in this segment is generated primarily through subscriptions, media production and distribution, and advertising. Subscription fee revenue is recognized over the terms of the applicable subscription period, which are one month or one year, production revenue is recognized when control is transferred to the customer to broadcast or exhibit, and advertising revenue is recognized when an advertisement is displayed or over the advertising period. Applications Applications' revenue largely consists of advertising revenue generated principally through the display of paid listings in response to search queries. The substantial majority of the paid listings displayed by our Applications businesses are supplied to us by Google pursuant to our services agreement with Google. Pursuant to this agreement, those of our Applications businesses that provide search services transmit search queries to Google, which in turn transmits a set of relevant and responsive paid listings back to these businesses for display in search results. This ad-serving process occurs independently of, but concurrently with, the generation of algorithmic search results for the same search queries. Google paid listings are displayed separately from algorithmic search results and are identified as sponsored listings on search results pages. Paid listings are priced on a price per click basis and when a user submits a search query through one of our Applications businesses and then clicks on a Google paid listing displayed in response to the query, Google bills the advertiser that purchased the paid listing directly and shares a portion of the fee charged to the advertiser with us. The Company recognizes paid listing revenue from Google when it delivers the user's click. In cases where the user’s click is generated due to the efforts of a third-party distributor, we recognize the amount due from Google as revenue and record a revenue share or other payment obligation to the third-party distributor as traffic acquisition costs. To a significantly lesser extent, Applications' revenue also consists of fees related to subscription downloadable desktop and mobile applications as well as display advertisements. Fees related to subscription downloadable desktop and paid mobile applications are generally recognized at the time of the sale when the software license is delivered. To the extent updates or maintenance is required or expected, revenue is recognized over the term of the applicable subscription period, which is primarily one or two years. Fees related to display advertisements are recognized when an advertisement is displayed. Publishing Publishing's revenue consists principally of advertising revenue, which is generated primarily through the display of paid listings in response to search queries and display advertisements (sold directly and through programmatic ad sales). The majority of the paid listings that our Publishing businesses display are supplied to us by Google in the manner, and pursuant to the services agreement with Google, described above under " Applications. " Transaction Price The objective of determining the transaction price is to estimate the amount of consideration the Company is due in exchange for its services or goods, including amounts that are variable. The Company determines the total transaction price, including an estimate of any variable consideration, at contract inception and reassesses this estimate each reporting period. The Company excludes from the measurement of transaction price all taxes assessed by governmental authorities that are both (i) imposed on and concurrent with a specific revenue-producing transaction and (ii) collected from customers. Accordingly, such tax amounts are not included as a component of revenue or cost of revenue. For contracts that have an original duration of one year or less, the Company uses the practical expedient available under ASU No. 2014-09 applicable to such contracts and does not consider the time value of money. Accounts Receivables, net of allowance for doubtful accounts and revenue reserves Accounts receivable include amounts billed and currently due from customers. The Company maintains an allowance for doubtful accounts to provide for the estimated amount of accounts receivables that will not be collected. The allowance for doubtful accounts is based upon a number of factors, including the length of time accounts receivable are past due, the Company’s previous loss history and the specific customer’s ability to pay its obligation. The time between the Company issuance of an invoice and payments due date is not significant; customer payments that are not collected in advance of the transfer of promised services or goods are generally due no later than 30 days from invoice date. The Company also maintains allowances to reserve for potential credits issued to consumers or other revenue adjustments. The amounts of these reserves are based primarily upon historical experience. Deferred Revenue Deferred revenue consists of advance payments that are received or due in advance of the Company's performance. The Company’s liabilities are reported on a contract by contract basis at the end of each reporting period. The Company generally classifies deferred revenue as current when the term of the applicable subscription period or expected completion of our performance obligation is one year or less. The deferred revenue balance as of January 1, 2018 is $332.2 million . During the three months ended June 30, 2018 , the Company recognized $224.0 million of revenue that was included in the deferred revenue balance as of April 1, 2018. During the six months ended June 30, 2018 , the Company recognized $278.8 million of revenue that was included in the deferred revenue balance as of January 1, 2018. The current and non-current deferred revenue balances at June 30, 2018 are $375.1 million and $2.0 million , respectively. Non-current deferred revenue is included in “Other long-term liabilities” in the accompanying consolidated balance sheet. Arrangements with Multiple Performance Obligations The Company’s contracts with customers may include multiple performance obligations. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on the prices charged to customers, which are directly observable or based on an estimate if not directly observable. For our multiple performance obligation arrangements that include functional intellectual property ("IP"), which comprise the downloadable apps and software of the Applications segment, the Company uses a residual approach to determine standalone selling prices for the functional IP. Assets Recognized from the Costs to Obtain a Contract with a Customer The Company has determined that certain costs, primarily commissions paid to employees pursuant to certain sales incentive programs and mobile app store fees, meet the requirements to be capitalized as a cost of obtaining a contract. Commissions paid to employees pursuant to certain sales incentive programs are amortized over the estimated customer relationship period. The Company calculates the estimated customer relationship period as the average customer life, which is based on historical data. When customer renewals are expected and the renewal commission is not commensurate with the initial commission, the average customer life includes renewal periods. For sales incentive programs where the customer relationship period is one year or less, the Company has elected the practical expedient to expense the costs as incurred. The Company generally capitalizes and amortizes mobile app store fees over the term of the applicable subscription. During the three and six months ended June 30, 2018 , the Company recognized expense of $84.7 million and $159.8 million , respectively, related to the amortization of these costs. The contract asset balance at June 30, 2018 is $72.8 million . Performance Obligations As permitted under the practical expedient available under ASU No. 2014-09, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance, and (iii) contracts for which the Company recognizes revenue at the amount which we have the right to invoice for services performed.

INCOME TAXES

INCOME TAXES	6 Months Ended
	Jun. 30, 2018
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 unrecognized tax benefits is recognized in the interim period in which the change occurs. The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in foreign jurisdictions, permanent and temporary differences, and the likelihood of the realization of deferred tax assets generated in the current year. The accounting estimates used to compute the provision or benefit for income taxes may change as new events occur, more experience is acquired, additional information is obtained or our tax environment changes. To the extent that the expected annual effective income tax rate changes during a quarter, the effect of the change on prior quarters is included in income tax provision in the quarter in which the change occurs. For the three months ended June 30, 2018, the Company recorded an income tax provision of $31.4 million , which represents an effective income tax rate of 10% . The effective tax rate is lower than the statutory rate of 21% due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. For the six months ended June 30, 2018 , the Company recorded an income tax provision of $2.4 million , which represents an effective income tax rate of 1% . The effective tax rate is lower than the statutory rate of 21% due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. For the three and six months ended June 30, 2017, the Company recorded an income tax benefit, despite pre-tax income, of $19.4 million and $43.3 million , respectively, due primarily to excess tax benefits generated by the exercise and vesting of stock-based awards. On December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act subjected to U.S. taxation certain previously deferred earnings of foreign subsidiaries as of December 31, 2017 (“Transition Tax”) and implemented a number of changes that took effect on January 1, 2018, including but not limited to, a reduction of the U.S. federal corporate tax rate from 35% to 21% and a new minimum tax on global intangible low-taxed income (“GILTI”) earned by foreign subsidiaries. The Company was able to make a reasonable estimate of the Transition Tax and recorded a provisional tax expense in the fourth quarter of 2017. The Company was also able to make a reasonable estimate of the impact of GILTI on the expected annual effective income tax rate and recorded a tax expense for the three and six months ended June 30, 2018. Any adjustment of the Company’s provisional tax expense will be reflected as a change in estimate in its results in the period in which the change in estimate is made in accordance with Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act , which is also included in the FASB issued ASU No. 2018-05, Income Taxes (Topic 740), Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118, which was issued and adopted by the Company in March 2018. The Company is continuing to gather additional information to more precisely compute the amount of the Transition Tax and expects to finalize its calculation prior to the filing of its U.S. federal tax return, which is due on October 15, 2018. The additional information includes, but is not limited to, the allocation and sourcing of income and deductions in 2017 for purposes of calculating the utilization of foreign tax credits. In addition, our estimates may also be impacted and adjusted as the law is clarified and additional guidance is issued at the federal and state levels. No adjustment was made in the three and six months ended June 30, 2018 to the Company’s previously recorded provisional tax expense, including for the impact of the issuance of Treasury Notices 2018-26 and 2018-28 as we continue to assess their impact, which we believe is immaterial. The Company recognizes interest and, if applicable, penalties related to unrecognized tax benefits in the income tax provision. Accruals for interest and penalties are not material. The Company is routinely under audit by federal, state, local and foreign authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. The Internal Revenue Service is currently auditing the Company’s federal income tax returns for the years ended December 31, 2010 through 2016. The statute of limitations for the years 2010 through 2012 has been extended to June 30, 2019, and the statute of limitations for the years 2013 and 2014 has been extended to March 31, 2019. Various other jurisdictions are open to examination for tax years beginning with 2009. Income taxes payable include unrecognized tax benefits considered sufficient to pay assessments that may result from examination of prior year tax returns. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes. Although management currently believes changes in unrecognized tax benefits from period to period and differences between amounts paid, if any, upon resolution of issues raised in audits and amounts previously provided 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. At June 30, 2018 and December 31, 2017 , unrecognized tax benefits, including interest and penalties, are $40.5 million and $39.7 million , respectively. If unrecognized tax benefits at June 30, 2018 are subsequently recognized, $37.6 million , net of related deferred tax assets and interest, would reduce income tax expense. The comparable amount as of December 31, 2017 was $37.2 million . The Company believes that it is reasonably possible that its unrecognized tax benefits could decrease by $12.7 million by June 30, 2019, due to expirations of statutes of limitations; $12.4 million of which would reduce the income tax provision. The Company regularly assesses the realizability of deferred tax assets considering all available evidence including, among other things, the nature, frequency and severity of prior cumulative losses, forecasts of future taxable income, the duration of statutory carryforward periods, available tax planning and historical experience, to the extent these items are applicable. As of June 30, 2018 , the Company has a gross deferred tax asset of $125.0 million that the Company expects to fully utilize on a more likely than not basis.

BUSINESS COMBINATION

BUSINESS COMBINATION	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
BUSINESS COMBINATION	BUSINESS COMBINATION On September 29, 2017, the Company completed the combination of the businesses in the Company's HomeAdvisor segment and Angie's List under a new publicly traded company called ANGI Homeservices (the "Combination"). Through the Combination, ANGI acquired 100% of the common stock of Angie's List on September 29, 2017 for a total purchase price valued at $781.4 million . The unaudited pro forma financial information in the table below presents the combined results of the Company and Angie's List as if the Combination had occurred on January 1, 2016. The unaudited pro forma financial information includes adjustments required under the acquisition method of accounting and is presented for informational purposes only and is not necessarily indicative of the results that would have been achieved had the Combination actually occurred on January 1, 2016. For the three and six months ended June 30, 2017 , pro forma adjustments include increases in stock-based compensation expense of $11.6 million and $26.3 million , respectively, and amortization of intangibles of $11.5 million and $23.1 million , respectively. Three Months Ended Six Months Ended (In thousands, except per share data) Revenue $ 839,729 $ 1,673,023 Net earnings attributable to IAC shareholders $ 53,996 $ 67,335 Basic earnings per share attributable to IAC shareholders $ 0.68 $ 0.86 Diluted earnings per share attributable to IAC shareholders $ 0.55 $ 0.69

MARKETABLE SECURITIES

MARKETABLE SECURITIES	6 Months Ended
	Jun. 30, 2018
Marketable Securities [Abstract]
MARKETABLE SECURITIES	MARKETABLE SECURITIES At June 30, 2018 and December 31, 2017 , the fair value of marketable securities are as follows: June 30, 2018 December 31, 2017 (In thousands) Available-for-sale marketable debt securities $ 119,746 $ 4,995 Marketable equity security 664 — Total marketable securities $ 120,410 $ 4,995 At June 30, 2018 , current available-for-sale marketable debt securities are as follows: Amortized Gross Gross Fair Value (In thousands) Treasury discount notes $ 99,795 $ 6 $ — $ 99,801 Commercial paper 19,945 — — 19,945 Total available-for-sale marketable debt securities $ 119,740 $ 6 $ — $ 119,746 The contractual maturities of debt securities classified as current available-for-sale at June 30, 2018 are within one year . There are no investments in available-for-sale marketable debt securities that are in an unrealized loss position as of June 30, 2018 . At December 31, 2017 , current available-for-sale marketable debt securities are as follows: Amortized Gross Gross Fair Value (In thousands) Commercial paper $ 4,995 $ — $ — $ 4,995 Total available-for-sale marketable debt securities $ 4,995 $ — $ — $ 4,995 The following table presents the proceeds from maturities and sales of available-for-sale marketable debt securities: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Proceeds from maturities and sales of available-for-sale marketable debt securities $ 5,000 $ 24,000 $ 10,000 $ 99,350 The specific-identification method is used to determine the cost of available-for-sale marketable debt securities sold and the amount of unrealized gains and losses reclassified out of accumulated other comprehensive income (loss) into earnings. There were no gross realized gains or losses from the maturities and sales of available-for-sale marketable debt securities for the three and six months ended June 30, 2018 and 2017 .

FAIR VALUE MEASUREMENTS AND FIN

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS	FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS The Company categorizes its financial instruments measured at fair value into a fair value hierarchy that prioritizes the inputs used in pricing the asset or liability. The three levels of the fair value hierarchy are: • Level 1: Observable inputs obtained from independent sources, such as quoted market prices for identical assets and liabilities in active markets. • Level 2: Other inputs, which are observable directly or indirectly, such as quoted market prices for similar assets or liabilities in active markets, quoted market prices for identical or similar assets or liabilities in markets that are not active and inputs that are derived principally from or corroborated by observable market data. The fair values of the Company's Level 2 financial assets are primarily obtained from observable market prices for identical underlying securities that may not be actively traded. Certain of these securities may have different market prices from multiple market data sources, in which case an average market price is used. • Level 3: Unobservable inputs for which there is little or no market data and require the Company to develop its own assumptions, based on the best information available in the circumstances, about the assumptions market participants would use in pricing the assets or liabilities. See below for a discussion of fair value measurements made using Level 3 inputs. The following tables present the Company's financial instruments that are measured at fair value on a recurring basis: June 30, 2018 Quoted Market Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Measurements (In thousands) Assets: Cash equivalents: Money market funds $ 726,865 $ — $ — $ 726,865 Commercial paper — 191,852 — 191,852 Treasury discount notes 162,322 — — 162,322 Time deposits — 80,037 — 80,037 Certificates of deposit — 960 — 960 Marketable securities: Treasury discount notes — 99,801 $ — 99,801 Commercial paper — 19,945 — 19,945 Marketable equity security 664 — — 664 Total $ 889,851 $ 392,595 $ — $ 1,282,446 Liabilities: Contingent consideration arrangements $ — $ — $ (1,910 ) $ (1,910 ) December 31, 2017 Quoted Market Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Measurements (In thousands) Assets: Cash equivalents: Money market funds $ 780,425 $ — $ — $ 780,425 Commercial paper — 215,325 — 215,325 Treasury discount notes 100,457 — — 100,457 Time deposits — 60,000 — 60,000 Certificates of deposit — 6,195 — 6,195 Marketable securities: Commercial paper — 4,995 — 4,995 Total $ 880,882 $ 286,515 $ — $ 1,167,397 Liabilities: Contingent consideration arrangements $ — $ — $ (2,647 ) $ (2,647 ) The Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are its contingent consideration arrangements. Contingent Consideration Arrangements Three Months Ended June 30, 2018 2017 (In thousands) Balance at April 1 $ (1,965 ) $ (21,821 ) Total net losses: Included in earnings: Fair value adjustments (54 ) (2,994 ) Included in other comprehensive income (loss) 109 (14 ) Balance at June 30 $ (1,910 ) $ (24,829 ) Contingent Consideration Arrangements Six Months Ended June 30, 2018 2017 (In thousands) Balance at January 1 $ (2,647 ) $ (33,871 ) Total net losses: Included in earnings: Fair value adjustments (210 ) (4,885 ) Included in other comprehensive loss (1 ) (1,073 ) Settlements 948 15,000 Balance at June 30 $ (1,910 ) $ (24,829 ) Contingent Consideration Arrangements As of June 30, 2018 , there are three contingent consideration arrangements related to business acquisitions. Two 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 $32.0 million and the gross fair value of these arrangements, before the unamortized discount, at June 30, 2018 is $2.0 million . No payment is expected for the one contingent consideration arrangement without a limit on the maximum earnout. The contingent consideration arrangements are based upon earnings performance and/or operating metrics. The Company generally determines the fair value of the contingent consideration arrangements by using probability-weighted analyses to determine the amounts of the gross liability, and, because the arrangements were initially long-term in nature, applying a discount rate that appropriately captures the risks associated with the obligation to determine the net amount reflected in the consolidated financial statements. The fair values of the contingent consideration arrangements at both June 30, 2018 and December 31, 2017 reflect discount rates of 12% . The fair value of contingent consideration arrangements is 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, including the accretion of the discount, if applicable, and changes are recognized in “General and administrative expense” in the accompanying consolidated statement of operations. The contingent consideration arrangement liability at June 30, 2018 and December 31, 2017 includes a current portion of $1.9 million and $0.6 million , respectively, and non-current portion of $2.0 million at December 31, 2017 , which are included in “Accrued expenses and other current liabilities” and “Other long-term liabilities,” respectively, in the accompanying consolidated balance sheet. At June 30, 2018 , there is no non-current portion of the contingent consideration arrangement liability. Equity securities without readily determinable fair values At June 30, 2018 and December 31, 2017 , the carrying values of the Company's investments in equity securities without readily determinable fair values totaled $216.2 million and $63.4 million , respectively, and are included in "Long-term investments" in the accompanying consolidated balance sheet. Following the adoption of the measurement alternative under ASU No. 2016-01 on January 1, 2018, the Company's equity securities without readily determinable fair values are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. All gains and losses on equity securities without readily determinable fair values, realized and unrealized, are recognized in "other income, net" in the accompanying consolidated statement of operations. The following table presents a summary of realized and unrealized gains and losses recorded in other income (expense), net, as adjustments to the carrying value of equity securities without readily determinable fair values held as of June 30, 2018. The gross unrealized gains relate to the Company's remaining investments in an investee following the sale of a portion of the Company's investment during the second quarter of 2018. Three Months Ended Six Months Ended (In thousands) Upward adjustments (gross unrealized gains) $ 128,786 $ 128,786 Downward adjustments (including impairment) (gross unrealized losses) (2,396 ) (2,588 ) Total $ 126,390 $ 126,198 Realized and unrealized gains and losses for the Company's marketable equity security and investments without a readily determinable fair value for the three and six months ended June 30, 2018 are as follows: Three Months Ended Six Months Ended (In thousands) Realized gains, net, for equity securities sold $ 27,275 $ 27,172 Unrealized gains, net, on equity securities held 126,414 126,559 Total gains recognized, net, in other income, net $ 153,689 $ 153,731 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 method investments, are adjusted to fair value only when an impairment charge is recognized. The Company's financial assets, comprising equity securities without readily determinable fair values, are adjusted to fair value when observable price changes are identified or an impairment charge is recognized. Such fair value measurements are based predominantly on Level 3 inputs. 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: June 30, 2018 December 31, 2017 Carrying Fair Carrying Fair (In thousands) Current portion of long-term debt $ (13,750 ) $ (13,613 ) $ (13,750 ) $ (13,802 ) Long-term debt, net (1,982,271 ) (2,156,890 ) (1,979,469 ) (2,168,108 ) The fair value of long-term debt, including the current portion, is estimated using observable market prices or indices for similar liabilities, which are Level 2 inputs.

LONG-TERM DEBT

LONG-TERM DEBT	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT Long-term debt consists of: June 30, 2018 December 31, 2017 (In thousands) MTCH Debt: MTCH Term Loan due November 16, 2022 $ 425,000 $ 425,000 6.375% Senior Notes due June 1, 2024 (the "6.375% MTCH Senior Notes"); interest payable each June 1 and December 1 400,000 400,000 5.00% Senior Notes due December 15, 2027 (the "5.00% MTCH Senior Notes"); interest payable each June 15 and December 15 450,000 450,000 Total MTCH long-term debt 1,275,000 1,275,000 Less: unamortized original issue discount 8,010 8,668 Less: unamortized debt issuance costs 12,725 13,636 Total MTCH debt, net 1,254,265 1,252,696 ANGI Debt: ANGI Term Loan due November 1, 2022 268,125 275,000 Less: current portion of ANGI Term Loan 13,750 13,750 Less: unamortized debt issuance costs 2,635 2,938 Total ANGI debt, net 251,740 258,312 IAC Debt: 0.875% Exchangeable Senior Notes due October 1, 2022 (the "Exchangeable Notes"); interest payable each April 1 and October 1 517,500 517,500 4.75% Senior Notes due December 15, 2022 (the "4.75% Senior Notes"); interest payable each June 15 and December 15 34,489 34,859 Total IAC long-term debt 551,989 552,359 Less: unamortized original issue discount 60,654 67,158 Less: unamortized debt issuance costs 15,069 16,740 Total IAC debt, net 476,266 468,461 Total long-term debt, net $ 1,982,271 $ 1,979,469 MTCH Senior Notes The 6.375% MTCH Senior Notes were issued on June 1, 2016. The proceeds of $400 million were used to prepay a portion of indebtedness outstanding under the MTCH Term Loan. At any time prior to June 1, 2019, these notes may be redeemed at a redemption price equal to the sum of the principal amount thereof, plus accrued and unpaid interest and a make-whole premium. Thereafter, these notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date. On December 4, 2017, MTCH issued $450 million aggregate principal amount of its 5.00% Senior Notes. The proceeds from these notes, along with cash on hand, were used to redeem the $445.2 million outstanding balance of the 6.75% MTCH Senior Notes, which were due on December 15, 2022, and pay the related call premium. At any time prior to December 15, 2022, the 5.00% MTCH Senior Notes may be redeemed at a redemption price equal to the sum of the principal amount thereof, plus accrued and unpaid interest and a make-whole premium. Thereafter, these notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date. The indentures governing the 6.375% and 5.00% MTCH Senior Notes (i) contain covenants that would limit MTCH's ability to pay dividends or to make distributions and repurchase or redeem MTCH stock in the event a default has occurred or MTCH's leverage ratio (as defined in the indentures) exceeds 5.0 to 1.0 and (ii) are ranked equally with each other. At June 30, 2018, there were no limitations pursuant thereto. There are additional covenants that limit MTCH's ability and the ability of its subsidiaries to, among other things, (i) incur indebtedness, make investments, or sell assets in the event MTCH is not in compliance with certain ratios set forth in the indentures, and (ii) incur liens, enter into agreements restricting MTCH subsidiaries' ability to pay dividends, enter into transactions with affiliates and consolidate, merge or sell substantially all of their assets. MTCH Term Loan and MTCH Credit Facility At both June 30, 2018 and December 31, 2017 , the outstanding balance on the MTCH Term Loan was $425 million and the loan bears interest at LIBOR plus 2.50% . The interest rate of the MTCH Term Loan was 4.59% and 3.85% at June 30, 2018 and December 31, 2017 , respectively. The MTCH Term Loan provides for annual principal payments as part of an excess cash flow sweep provision, the amount of which, if any, is governed by the secured net leverage ratio contained in the credit agreement. Interest payments are due at least quarterly through the term of the loan. MTCH has a $500 million revolving credit facility (the "MTCH Credit Facility") that expires on October 7, 2020. At June 30, 2018 and December 31, 2017 , there were no outstanding borrowings under the MTCH Credit Facility. The annual commitment fee on undrawn funds based on the current leverage ratio is 30 basis points. Borrowings under the MTCH Credit Facility bear interest, at MTCH's option, at a base rate or LIBOR, in each case plus an applicable margin, which is determined by reference to a pricing grid based on MTCH's consolidated net leverage ratio. The terms of the MTCH Credit Facility require MTCH to maintain a consolidated net leverage ratio of not more than 5.0 to 1.0 and a minimum interest coverage ratio of not less than 2.5 to 1.0 (in each case as defined in the agreement). There are additional covenants under the MTCH Credit Facility and the MTCH Term Loan that limit the ability of MTCH and its subsidiaries to, among other things, incur indebtedness, pay dividends or make distributions. While the MTCH Term Loan remains outstanding, these same covenants under its credit agreement are generally more restrictive than the covenants that are applicable to the MTCH Credit Facility. Obligations under the MTCH Credit Facility and MTCH Term Loan are unconditionally guaranteed by certain MTCH wholly-owned domestic subsidiaries, and are also secured by the stock of certain MTCH domestic and foreign subsidiaries. The MTCH Term Loan and outstanding borrowings, if any, under the MTCH Credit Facility rank equally with each other, and have priority over the 6.375% and 5.00% MTCH Senior Notes to the extent of the value of the assets securing the borrowings under the MTCH credit agreement. ANGI Term Loan: At June 30, 2018 and December 31, 2017 , the outstanding balance on the ANGI Term Loan was $268.1 million and $275.0 million respectively. The ANGI Term Loan bears interest at LIBOR plus 2.00% , which is subject to change in future periods based on ANGI's consolidated net leverage ratio, and was 4.36% and 3.38% at June 30, 2018 and December 31, 2017 , respectively. Interest payments are due at least quarterly through the term of the loan and quarterly principal payments of 1.25% of the original principal amount in the first three years, 2.5% in the fourth year and 3.75% in the fifth year are required. The terms of the ANGI Term Loan require ANGI to maintain a consolidated net leverage ratio of not more than 4.5 to 1.0 and a minimum interest coverage ratio of not less than 2.5 to 1.0 (in each case as defined in the credit agreement). There are additional covenants under the ANGI Term Loan that limit the ability of ANGI and its subsidiaries to, among other things, incur indebtedness, pay dividends or make distributions. The ANGI Term Loan is guaranteed by ANGI's wholly-owned material domestic subsidiaries and is secured by substantially all assets of ANGI and the guarantors, subject to certain exceptions. IAC Exchangeable Notes: On October 2, 2017, IAC FinanceCo, Inc., a direct, wholly-owned subsidiary of the Company, issued $517.5 million aggregate principal amount of its 0.875% Exchangeable Senior Notes (the “Exchangeable Notes”). The Exchangeable Notes are guaranteed by the Company. Each $1,000 of principal of the Exchangeable Notes is exchangeable for 6.5713 shares of the Company's common stock, which is equivalent to an exchange price of approximately $152.18 per share, subject to adjustment upon the occurrence of specified events. Upon exchange, the Company has the right to settle the principal amount of Exchangeable Notes with any of the three following alternatives: (1) shares of our common stock, (2) cash or (3) a combination of cash and shares of our common stock. The Exchangeable Notes are exchangeable at any time prior to the close of business on the business day immediately preceding July 1, 2022 only under the following circumstances: (1) during any calendar quarter (and only during such calendar quarter), if the last reported sale price of our common stock for at least 20 trading days during the period of 30 consecutive trading days during the immediately preceding calendar quarter is greater than or equal to 130% of the exchange price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the exchange rate on each such trading day; (3) if the issuer calls the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events as further described under the indenture governing the Exchangeable Notes. On or after July 1, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may exchange all or any portion of their Exchangeable Notes regardless of the foregoing conditions. A portion of the net proceeds from the sale of the Exchangeable Notes of $499.5 million , after deducting fees and expenses, was used to pay the net premium of $50.7 million on the Exchangeable Note Hedge and Warrant (defined below). We separately account for the debt and the equity components of the Exchangeable Notes. Accordingly, the Company recorded a debt discount and corresponding increase to additional paid-in capital of $70.4 million , which is the fair value attributed to the exchange feature or equity component of the debt, on the date of issuance. The Company is amortizing the debt discount utilizing the effective interest method over the life of the Exchangeable Notes which increases the effective interest rate from its coupon rate of 0.875% to 3.88% . In connection with the debt offering, the Company purchased call options allowing the Company to purchase initially (subject to adjustment upon the occurrence of specified events) the entire 3.4 million shares that would be issuable upon the exchange of the Exchangeable Notes at approximately $152.18 per share (the "Exchangeable Note Hedge"), and sold warrants allowing the holder to purchase initially (subject to adjustment upon the occurrence of specified events) 3.4 million shares at $229.70 per share (the "Warrant"). The Exchangeable Note Hedge is expected to reduce the potential dilutive effect of the Company's common stock upon any exchange of notes and/or offset any cash payment IAC FinanceCo, Inc. is required to make in excess of the principal amount of the exchanged notes. The Warrants would separately have a dilutive effect on the Company's common stock to the extent that the market price per share of the Company common stock exceeds the applicable strike price of the Warrants. As of June 30, 2018 , the if-converted value of the Exchangeable Notes exceeds its principal amount by $1.1 million based on the Company's stock price on June 30, 2018 . For the three and six months ended June 30, 2018 , the Company incurred interest expense of $5.3 million and $10.5 million , which includes amortization of original issue discount of $3.3 million and $6.5 million , and debt issuance costs of $0.8 million and $1.7 million , respectively. As of June 30, 2018 , the unamortized discount is $60.7 million resulting in a net carrying value of the liability component of $456.8 million . IAC Senior Notes The 4.75% Senior Notes were issued by IAC on December 21, 2012. These Notes are unconditionally guaranteed by certain of our wholly-owned domestic subsidiaries, which are designated as guarantor subsidiaries. See " Note 13—Guarantor and Non-Guarantor Financial Information " for financial information relating to guarantor and non-guarantor subsidiaries. The 4.75% Senior Notes may be redeemed at redemption prices set forth in the indenture governing the notes, together with accrued and unpaid interest thereon to the applicable redemption date. IAC Credit Facility IAC has a $300 million revolving credit facility (the "IAC Credit Facility") that expires October 7, 2020. At June 30, 2018 and December 31, 2017 , there were no outstanding borrowings under the IAC Credit Facility. The annual commitment fee on undrawn funds is 25 basis points, and is based on the leverage ratio (as defined in the agreement) most recently reported. Borrowings under the IAC Credit Facility bear interest, at the Company's option, at a base rate or LIBOR, in each case, plus an applicable margin, which is determined by reference to a pricing grid based on the Company's leverage ratio. The terms of the IAC Credit Facility require that the Company maintains a leverage ratio of not more than 3.25 to 1.0 and restrict our ability to incur additional indebtedness. Borrowings under the IAC Credit Facility are unconditionally guaranteed by substantially the same domestic subsidiaries that guarantee the 4.75% Senior Notes and are also secured by the stock of certain of our domestic and foreign subsidiaries. The 4.75% Senior Notes are subordinate to the outstanding borrowings under the IAC Credit Facility to the extent of the value of the assets securing such borrowings.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE LOSS	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE LOSS	ACCUMULATED OTHER COMPREHENSIVE LOSS The following tables present the components of accumulated other comprehensive (loss) income and items reclassified out of accumulated other comprehensive loss into earnings: Three Months Ended June 30, 2018 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive Loss (In thousands) Balance as of April 1 $ (74,950 ) $ — $ (74,950 ) Other comprehensive (loss) income before reclassifications (37,589 ) 13 (37,576 ) Amounts reclassified to earnings (191 ) — (191 ) Net current period other comprehensive (loss) income (37,780 ) 13 (37,767 ) Balance as of June 30 $ (112,730 ) $ 13 $ (112,717 ) Three Months Ended June 30, 2017 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive (Loss) Income (In thousands) Balance as of April 1 $ (151,373 ) $ 4,028 $ (147,345 ) Other comprehensive income before reclassifications 14,664 5 14,669 Amounts reclassified to earnings (29 ) (4,033 ) (a) (4,062 ) Net current period other comprehensive income (loss) 14,635 (4,028 ) 10,607 Balance as of June 30 $ (136,738 ) $ — $ (136,738 ) ___________________________________________________________________________________________ (a) Amount includes a tax benefit of $3.8 million . Six Months Ended June 30, 2018 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive (Loss) Income (In thousands) Balance as of January 1 $ (103,568 ) $ — $ (103,568 ) Other comprehensive (loss) income before reclassifications (9,110 ) 13 (9,097 ) Amounts reclassified to earnings (52 ) — (52 ) Net current period other comprehensive (loss) income (9,162 ) 13 (9,149 ) Balance as of June 30 $ (112,730 ) $ 13 $ (112,717 ) Six Months Ended June 30, 2017 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive (Loss) Income (In thousands) Balance as of January 1 $ (170,149 ) $ 4,026 $ (166,123 ) Other comprehensive income before reclassifications 32,726 7 32,733 Amounts reclassified to earnings 685 (4,033 ) (b) (3,348 ) Net current period other comprehensive income (loss) 33,411 (4,026 ) 29,385 Balance as of June 30 $ (136,738 ) $ — $ (136,738 ) ___________________________________________________________________________________________ (b) Amount includes a tax benefit of $3.8 million . The amounts reclassified out of foreign currency translation adjustment into earnings for both the three and six months ended June 30, 2018 and 2017 relate to the liquidation of international subsidiaries.

EARNINGS PER SHARE

EARNINGS PER SHARE	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 2017 Basic Diluted Basic Diluted (In thousands, except per share data) Numerator: Net earnings $ 280,854 $ 280,854 $ 80,557 $ 80,557 Net earnings attributable to noncontrolling interests (62,501 ) (62,501 ) (14,289 ) (14,289 ) Impact from public subsidiaries' dilutive securities (a) — (6,994 ) — (7,925 ) Net earnings attributable to IAC shareholders $ 218,353 $ 211,359 $ 66,268 $ 58,343 Denominator: Weighted average basic shares outstanding 83,604 83,604 79,067 79,067 Dilutive securities (a) (b) (c) (d) — 7,330 — 4,711 Denominator for earnings per share—weighted average shares (a) (b) (c) (d) 83,604 90,934 79,067 83,778 Earnings per share attributable to IAC shareholders: Earnings per share $ 2.61 $ 2.32 $ 0.84 $ 0.70 Six Months Ended June 30, 2018 2017 Basic Diluted Basic Diluted (In thousands, except per share data) Numerator: Net earnings $ 368,693 $ 368,693 $ 109,020 $ 109,020 Net earnings attributable to noncontrolling interests (79,258 ) (79,258 ) (16,543 ) (16,543 ) Impact from public subsidiaries' dilutive securities (a) — (12,569 ) — (10,355 ) Net earnings attributable to IAC shareholders $ 289,435 $ 276,866 $ 92,477 $ 82,122 Denominator: Weighted average basic shares outstanding 83,296 83,296 78,633 78,633 Dilutive securities (a) (b) (c) (d) — 7,438 — 4,510 Denominator for earnings per share—weighted average shares (a) (b) (c) (d) 83,296 90,734 78,633 83,143 Earnings per share attributable to IAC shareholders: Earnings per share $ 3.47 $ 3.05 $ 1.18 $ 0.99 ________________________ (a) For the three and six months ended June 30, 2018 , it is more dilutive for IAC to settle certain MTCH and ANGI equity awards. For the three and six months ended June 30, 2017, it is more dilutive for MTCH to settle certain MTCH equity awards. The impact from ANGI’s dilutive securities is not applicable for periods prior to the Combination. (b) 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, warrants and subsidiary denominated equity, exchange of the Company's Exchangeable Notes and vesting of restricted stock units ("RSUs"). For the three and six months ended June 30, 2018 , 3.4 million and 6.9 million potentially dilutive securities, respectively, are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. For the three and six months ended June 30, 2017, less than 0.1 million and 0.5 million potentially dilutive securities, respectively, are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. (c) Market-based awards and performance-based stock units (“PSUs”) are considered contingently issuable shares. Shares issuable upon exercise or vesting of market-based awards and PSUs are included in the denominator for earnings per share if (i) the applicable market or performance condition(s) has been met and (ii) the inclusion of the market-based awards and PSUs is dilutive for the respective reporting periods. For both the three and six months ended June 30, 2018 , 0.2 million shares underlying market-based awards and PSUs were excluded from the calculation of diluted earnings per share because the market or performance conditions had not been met. For both the three and six months ended June 30, 2017, 0.4 million shares underlying market-based awards and PSUs were excluded from the calculation of diluted earnings per share because the market or performance conditions had not been met. (d) It is the Company's intention to settle the Exchangeable Notes through a combination of cash, equal to the face amount of the notes, and shares; therefore, the Exchangeable Notes are only dilutive for periods during which the average price of IAC common stock exceeds the approximate $152.18 per share exchange price per $1,000 principal amount of the Exchangeable Notes.

SEGMENT INFORMATION

SEGMENT INFORMATION	6 Months Ended
	Jun. 30, 2018
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. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Revenue: Match Group $ 421,196 $ 309,572 $ 828,563 $ 608,336 ANGI Homeservices 294,822 180,711 550,133 331,456 Video 62,757 55,182 128,919 105,759 Applications 143,074 143,969 275,061 302,866 Publishing 137,355 78,124 271,677 156,204 Other (a) — — — 23,980 Inter-segment eliminations (82 ) (171 ) (156 ) (381 ) Total $ 1,059,122 $ 767,387 $ 2,054,197 $ 1,528,220 ___________________ (a) The 2017 results at the Other segment consists of the results of The Princeton Review prior to its sale on March 31, 2017. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Operating Income (Loss): Match Group $ 150,165 $ 82,975 $ 262,398 $ 141,846 ANGI Homeservices 23,262 (4,141 ) 12,506 (2,753 ) Video (14,982 ) (7,829 ) (30,857 ) (23,418 ) Applications 33,077 39,134 58,538 71,902 Publishing 12,807 (2,857 ) 28,618 (8,645 ) Other — — — (5,621 ) Corporate (35,892 ) (31,647 ) (72,816 ) (60,616 ) Total $ 168,437 $ 75,635 $ 258,387 $ 112,695 Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Adjusted EBITDA: (b) Match Group $ 175,561 $ 109,910 $ 313,302 $ 196,141 ANGI Homeservices $ 66,979 $ 13,666 $ 103,619 $ 23,878 Video $ (11,102 ) $ (6,832 ) $ (24,042 ) $ (21,564 ) Applications $ 35,404 $ 40,546 $ 62,156 $ 75,479 Publishing $ 13,755 $ 2,740 $ 30,968 $ 3,919 Other $ — $ — $ — $ (1,532 ) Corporate $ (15,552 ) $ (15,523 ) $ (32,560 ) $ (29,838 ) ________________________ (b) The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets, if applicable, 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 businesses, and this measure is one of the primary metrics on which our internal budgets are based and by which management is compensated. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses. The following table presents the revenue of the Company's segments disaggregated by type of service: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Match Group Direct revenue: North America $ 222,163 $ 178,505 $ 433,520 $ 353,833 International 185,564 120,918 366,944 233,342 Direct revenue 407,727 299,423 800,464 587,175 Indirect revenue (principally advertising revenue) 13,469 10,149 28,099 21,161 Total Match Group revenue $ 421,196 $ 309,572 $ 828,563 $ 608,336 ANGI Homeservices Marketplace: Consumer connection revenue $ 187,172 $ 141,163 $ 336,232 $ 257,163 Membership subscription revenue 16,565 13,704 32,192 26,456 Other revenue 998 888 1,919 1,780 Marketplace revenue 204,735 155,755 370,343 285,399 Advertising & Other revenue 72,770 9,736 143,188 18,164 North America 277,505 165,491 513,531 303,563 Consumer connection revenue 12,496 11,170 26,863 19,635 Membership subscription revenue 4,517 3,872 9,188 7,878 Other revenue 304 178 551 380 Europe 17,317 15,220 36,602 27,893 Total ANGI Homeservices revenue $ 294,822 $ 180,711 $ 550,133 $ 331,456 Video Subscription revenue $ 32,724 $ 26,782 $ 67,067 $ 51,599 Media production and distribution revenue 16,267 23,744 36,315 44,677 Advertising and other revenue 13,766 4,656 25,537 9,483 Total Video revenue $ 62,757 $ 55,182 $ 128,919 $ 105,759 Applications Advertising revenue: Google advertising revenue $ 88,821 $ 94,130 $ 176,252 $ 199,228 Other 6,482 8,678 12,836 14,991 Advertising revenue 95,303 102,808 189,088 214,219 Subscription and other revenue 28,262 15,075 44,551 33,996 Consumer 123,565 117,883 233,639 248,215 Advertising revenue: Google advertising revenue 18,746 25,329 39,892 53,038 Other 741 695 1,472 1,478 Advertising revenue 19,487 26,024 41,364 54,516 Other revenue 22 62 58 135 Partnerships 19,509 26,086 41,422 54,651 Total Applications revenue $ 143,074 $ 143,969 $ 275,061 $ 302,866 Publishing Advertising revenue: Google advertising revenue $ 12,353 $ 10,808 $ 25,991 $ 20,597 Other 26,223 17,234 50,170 33,100 Advertising revenue 38,576 28,042 76,161 53,697 Other revenue 1,183 304 2,406 649 Premium Brands 39,759 28,346 78,567 54,346 Advertising revenue: Google advertising revenue 84,563 43,794 173,255 88,481 Other 9,662 5,786 16,275 12,991 Advertising revenue 94,225 49,580 189,530 101,472 Other revenue 3,371 198 3,580 386 Ask & Other 97,596 49,778 193,110 101,858 Total Publishing revenue $ 137,355 $ 78,124 $ 271,677 $ 156,204 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Revenue: United States $ 708,571 $ 545,020 $ 1,366,151 $ 1,093,618 All other countries 350,551 222,367 688,046 434,602 Total $ 1,059,122 $ 767,387 $ 2,054,197 $ 1,528,220 June 30, December 31, (In thousands) Long-lived assets (excluding goodwill and intangible assets): United States $ 277,566 $ 286,541 All other countries 29,036 28,629 Total $ 306,602 $ 315,170 The following tables reconcile operating income (loss) for the Company's reportable segments and net earnings attributable to IAC shareholders to Adjusted EBITDA: Three Months Ended June 30, 2018 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 150,165 $ 16,706 $ 8,399 $ 237 $ 54 $ 175,561 ANGI Homeservices 23,262 $ 22,053 $ 5,886 $ 15,778 $ — $ 66,979 Video (14,982 ) $ 1,293 $ 447 $ 2,140 $ — $ (11,102 ) Applications 33,077 $ — $ 773 $ 1,554 $ — $ 35,404 Publishing 12,807 $ — $ 469 $ 479 $ — $ 13,755 Other — $ — $ — $ — $ — $ — Corporate (35,892 ) $ 17,509 $ 2,831 $ — $ — $ (15,552 ) Operating income 168,437 Interest expense (27,356 ) Other income, net 171,141 Earnings before income taxes 312,222 Income tax provision (31,368 ) Net earnings 280,854 Net earnings attributable to noncontrolling interests (62,501 ) Net earnings attributable to IAC shareholders $ 218,353 Three Months Ended June 30, 2017 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 82,975 $ 15,654 $ 7,883 $ 404 $ 2,994 $ 109,910 ANGI Homeservices (4,141 ) $ 11,839 $ 3,218 $ 2,750 $ — $ 13,666 Video (7,829 ) $ 133 $ 552 $ 312 $ — $ (6,832 ) Applications 39,134 $ — $ 921 $ 491 $ — $ 40,546 Publishing (2,857 ) $ — $ 930 $ 4,667 $ — $ 2,740 Other — $ — $ — $ — $ — $ — Corporate (31,647 ) $ 11,289 $ 4,835 $ — $ — $ (15,523 ) Operating income 75,635 Interest expense (24,728 ) Other income, net 10,230 Earnings before income taxes 61,137 Income tax benefit 19,420 Net earnings 80,557 Net earnings attributable to noncontrolling interests (14,289 ) Net earnings attributable to IAC shareholders $ 66,268 Six Months Ended June 30, 2018 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 262,398 $ 33,669 $ 16,546 $ 479 $ 210 $ 313,302 ANGI Homeservices 12,506 $ 46,959 $ 12,070 $ 32,084 $ — $ 103,619 Video (30,857 ) $ 1,424 $ 1,122 $ 4,269 $ — $ (24,042 ) Applications 58,538 $ — $ 1,528 $ 2,090 $ — $ 62,156 Publishing 28,618 $ — $ 1,131 $ 1,219 $ — $ 30,968 Other — $ — $ — $ — $ — $ — Corporate (72,816 ) $ 34,591 $ 5,665 $ — $ — $ (32,560 ) Operating income 258,387 Interest expense (53,861 ) Other income, net 166,522 Earnings before income taxes 371,048 Income tax provision (2,355 ) Net earnings 368,693 Net earnings attributable to noncontrolling interests (79,258 ) Net earnings attributable to IAC shareholders $ 289,435 Six Months Ended June 30, 2017 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 141,846 $ 33,678 $ 15,472 $ 807 $ 4,338 $ 196,141 ANGI Homeservices (2,753 ) $ 16,300 $ 6,214 $ 4,117 $ — $ 23,878 Video (23,418 ) $ 133 $ 1,096 $ 625 $ — $ (21,564 ) Applications 71,902 $ — $ 1,932 $ 1,097 $ 548 $ 75,479 Publishing (8,645 ) $ — $ 2,949 $ 9,615 $ — $ 3,919 Other (5,621 ) $ 1,729 $ 836 $ 1,524 $ — $ (1,532 ) Corporate (60,616 ) $ 21,050 $ 9,728 $ — $ — $ (29,838 ) Operating income 112,695 Interest expense (49,520 ) Other income, net 2,516 Earnings before income taxes 65,691 Income tax benefit 43,329 Net earnings 109,020 Net earnings attributable to noncontrolling interests (16,543 ) Net earnings attributable to IAC shareholders $ 92,477

OTHER INCOME, NET

OTHER INCOME, NET	6 Months Ended
	Jun. 30, 2018
Other Income and Expenses [Abstract]
OTHER INCOME, NET	OTHER INCOME, NET Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Other income, net $171,141 $10,230 $166,522 $2,516 Other income, net consists of: Three months ended June 30, 2018 and 2017 Other income, net in 2018 includes: $126.4 million of net unrealized gains related to certain equity investments that were adjusted to fair value in accordance with ASU No. 2016-01, which was adopted on January 1, 2018; $27.3 million in realized gains related to the sale of certain equity investments; $10.0 million in net foreign currency exchange gains due primarily to the strengthening of the dollar relative to the British Pound and Euro; and interest income of $7.0 million . Other income, net in 2017 includes: $21.2 million in realized gains related to the sales of certain investments; $2.5 million of interest income; $8.0 million mark-to-market charge pertaining to a subsidiary denominated equity award held by a non-employee; $3.6 million in net foreign currency exchange losses due primarily to the weakening of the dollar relative to the British Pound and Euro; and a $1.4 million other-than-temporary impairment charge related to a cost method investment. Six months ended June 30, 2018 and 2017 Other income, net in 2018 includes: $126.6 million of net unrealized gains related to certain equity investments as described above in the three-month discussion; $27.2 million in realized gains related to the sale of certain equity investments; $12.2 million of interest income; and $2.1 million in net foreign currency exchange gains due primarily to the strengthening of the dollar relative to the British Pound and Euro. Other income, net in 2017 includes: $21.3 million in realized gains related to the sale of certain investments; $4.1 million of interest income; $10.6 million mark-to-market charge pertaining to a subsidiary denominated equity award held by a non-employee; $6.2 million in net foreign currency exchange losses due primarily to the weakening of the dollar relative to the British Pound and Euro; and $4.8 million in other-than-temporary impairment charges related to certain cost method investments.

CONTINGENCIES

CONTINGENCIES	6 Months Ended
	Jun. 30, 2018
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 3—Income Taxes " for additional information related to income tax contingencies.

GUARANTOR AND NON-GUARANTOR FIN

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	6 Months Ended
	Jun. 30, 2018
Guarantor and Nonguarantor Financial Statements [Abstract]
GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION	GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION The 4.75% 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 June 30, 2018 and December 31, 2017 and for the three and six months ended June 30, 2018 and 2017 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 June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Cash and cash equivalents $ 813,872 $ — $ 830,957 $ — $ 1,644,829 Marketable securities 119,746 — 664 — 120,410 Accounts receivable, net of allowance — 118,672 224,904 — 343,576 Other current assets 45,720 26,123 166,114 — 237,957 Intercompany receivables — 1,129,828 — (1,129,828 ) — Property and equipment, net of accumulated depreciation and amortization 4,306 168,685 133,611 — 306,602 Goodwill — 412,010 2,166,286 — 2,578,296 Intangible assets, net of accumulated amortization — 73,933 562,418 — 636,351 Investment in subsidiaries 1,828,822 202,616 — (2,031,438 ) — Other non-current assets 227,459 83,005 222,638 (165,839 ) 367,263 Total assets $ 3,039,925 $ 2,214,872 $ 4,307,592 $ (3,327,105 ) $ 6,235,284 Current portion of long-term debt $ — $ — $ 13,750 $ — $ 13,750 Accounts payable, trade 642 37,027 41,438 — 79,107 Other current liabilities 28,128 89,902 634,793 — 752,823 Long-term debt, net 34,233 — 1,948,038 — 1,982,271 Income taxes payable — 1,434 22,508 — 23,942 Intercompany liabilities 400,448 — 729,380 (1,129,828 ) — Other long-term liabilities 395 18,779 217,389 (165,839 ) 70,724 Redeemable noncontrolling interests — — 75,719 — 75,719 Shareholders' equity (deficit) 2,576,079 2,067,730 (36,292 ) (2,031,438 ) 2,576,079 Noncontrolling interests — — 660,869 — 660,869 Total liabilities and shareholders' equity $ 3,039,925 $ 2,214,872 $ 4,307,592 $ (3,327,105 ) $ 6,235,284 Balance sheet at December 31, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Cash and cash equivalents $ 585,639 $ — $ 1,045,170 $ — $ 1,630,809 Marketable securities 4,995 — — — 4,995 Accounts receivable, net of allowance 31 109,289 194,707 — 304,027 Other current assets 49,159 33,387 102,828 — 185,374 Intercompany receivables — 668,703 — (668,703 ) — Property and equipment, net of accumulated depreciation and amortization 2,811 174,323 138,036 — 315,170 Goodwill — 412,010 2,147,056 — 2,559,066 Intangible assets, net of accumulated amortization — 74,852 588,885 — 663,737 Investment in subsidiaries 2,077,898 554,998 — (2,632,896 ) — Other non-current assets 170,073 87,306 79,688 (132,435 ) 204,632 Total assets $ 2,890,606 $ 2,114,868 $ 4,296,370 $ (3,434,034 ) $ 5,867,810 Current portion of long-term debt $ — $ — $ 13,750 $ — $ 13,750 Accounts payable, trade 5,163 30,469 40,939 — 76,571 Other current liabilities 29,489 88,050 591,868 — 709,407 Long-term debt, net 34,572 — 1,944,897 — 1,979,469 Income taxes payable 16 1,605 24,003 — 25,624 Intercompany liabilities 390,827 — 277,876 (668,703 ) — Other long-term liabilities 511 18,613 186,610 (132,435 ) 73,299 Redeemable noncontrolling interests — — 42,867 — 42,867 Shareholders' equity 2,430,028 1,976,131 656,765 (2,632,896 ) 2,430,028 Noncontrolling interests — — 516,795 — 516,795 Total liabilities and shareholders' equity $ 2,890,606 $ 2,114,868 $ 4,296,370 $ (3,434,034 ) $ 5,867,810 Statement of operations for the three months ended June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 207,964 $ 851,240 $ (82 ) $ 1,059,122 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 75 61,215 156,991 (57 ) 218,224 Selling and marketing expense 189 80,302 289,205 (36 ) 369,660 General and administrative expense 31,652 14,259 142,441 11 188,363 Product development expense 564 14,151 60,730 — 75,445 Depreciation 266 3,126 15,413 — 18,805 Amortization of intangibles — 410 19,778 — 20,188 Total operating costs and expenses 32,746 173,463 684,558 (82 ) 890,685 Operating (loss) income (32,746 ) 34,501 166,682 — 168,437 Equity in earnings of unconsolidated affiliates 233,980 8,630 — (242,610 ) — Interest expense (423 ) — (26,933 ) — (27,356 ) Other income, net (a) 6,436 62,204 153,770 (51,269 ) 171,141 Earnings before income taxes 207,247 105,335 293,519 (293,879 ) 312,222 Income tax benefit (provision) 11,106 (27,557 ) (14,917 ) — (31,368 ) Net earnings 218,353 77,778 278,602 (293,879 ) 280,854 Net earnings attributable to noncontrolling interests — — (62,501 ) — (62,501 ) Net earnings attributable to IAC shareholders 218,353 $ 77,778 $ 216,101 $ (293,879 ) $ 218,353 Comprehensive income attributable to IAC shareholders $ 180,909 $ 77,482 $ 170,613 $ (248,095 ) $ 180,909 (a) During the three months ended June 30, 2018, foreign cash of $50 million was repatriated to the U.S. Statement of operations for the three months ended June 30, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 169,831 $ 597,724 $ (168 ) $ 767,387 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 47 30,131 108,989 (134 ) 139,033 Selling and marketing expense 613 82,268 237,269 (46 ) 320,104 General and administrative expense 35,778 14,785 99,647 12 150,222 Product development expense 936 13,792 40,702 — 55,430 Depreciation 445 5,884 12,010 — 18,339 Amortization of intangibles — 4,667 3,957 — 8,624 Total operating costs and expenses 37,819 151,527 502,574 (168 ) 691,752 Operating (loss) income (37,819 ) 18,304 95,150 — 75,635 Equity in earnings of unconsolidated affiliates 91,382 4,706 — (96,088 ) — Interest expense (5,648 ) — (19,080 ) — (24,728 ) Other (expense) income, net (6,821 ) 6,807 10,244 — 10,230 Earnings before income taxes 41,094 29,817 86,314 (96,088 ) 61,137 Income tax benefit (provision) 25,174 (1,139 ) (4,615 ) — 19,420 Net earnings 66,268 28,678 81,699 (96,088 ) 80,557 Net earnings attributable to noncontrolling interests — — (14,289 ) — (14,289 ) Net earnings attributable to IAC shareholders $ 66,268 $ 28,678 $ 67,410 $ (96,088 ) $ 66,268 Comprehensive income attributable to IAC shareholders $ 76,875 $ 30,852 $ 85,140 $ (115,992 ) $ 76,875 Statement of operations for the six months ended June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 420,853 $ 1,633,500 $ (156 ) $ 2,054,197 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 151 117,439 302,703 (107 ) 420,186 Selling and marketing expense 402 170,440 601,731 (81 ) 772,492 General and administrative expense 63,061 29,640 279,814 32 372,547 Product development expense 1,216 28,420 122,746 — 152,382 Depreciation 532 6,466 31,064 — 38,062 Amortization of intangibles — 919 39,222 — 40,141 Total operating costs and expenses 65,362 353,324 1,377,280 (156 ) 1,795,810 Operating (loss) income (65,362 ) 67,529 256,220 — 258,387 Equity in earnings of unconsolidated affiliates 336,730 8,303 — (345,033 ) — Interest expense (852 ) — (53,009 ) — (53,861 ) Other (expense) income, net (a) (10,411 ) 349,087 155,960 (328,114 ) 166,522 Earnings before income taxes 260,105 424,919 359,171 (673,147 ) 371,048 Income tax benefit (provision) 29,330 (38,523 ) 6,838 — (2,355 ) Net earnings 289,435 386,396 366,009 (673,147 ) 368,693 Net earnings attributable to noncontrolling interests — — (79,258 ) — (79,258 ) Net earnings attributable to IAC shareholders 289,435 $ 386,396 $ 286,751 $ (673,147 ) $ 289,435 Comprehensive income attributable to IAC shareholders $ 280,348 $ 386,443 $ 275,940 $ (662,383 ) $ 280,348 (a) During the six months ended June 30, 2018, foreign cash of $326 million was repatriated to the U.S. Statement of operations for the six months ended June 30, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 351,403 $ 1,177,198 $ (381 ) $ 1,528,220 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 160 62,839 222,299 (307 ) 284,991 Selling and marketing expense 939 174,218 495,458 (100 ) 670,515 General and administrative expense 61,914 30,375 201,502 26 293,817 Product development expense 1,506 29,179 79,505 — 110,190 Depreciation 883 13,017 24,327 — 38,227 Amortization of intangibles — 9,752 8,033 — 17,785 Total operating costs and expenses 65,402 319,380 1,031,124 (381 ) 1,415,525 Operating (loss) income (65,402 ) 32,023 146,074 — 112,695 Equity in earnings of unconsolidated affiliates 142,838 2,023 — (144,861 ) — Interest expense (11,476 ) — (38,044 ) — (49,520 ) Other (expense) income, net (12,626 ) 12,898 2,244 — 2,516 Earnings before income taxes 53,334 46,944 110,274 (144,861 ) 65,691 Income tax benefit (provision) 39,143 (10,828 ) 15,014 — 43,329 Net earnings 92,477 36,116 125,288 (144,861 ) 109,020 Net earnings attributable to noncontrolling interests — — (16,543 ) — (16,543 ) Net earnings attributable to IAC shareholders $ 92,477 $ 36,116 $ 108,745 $ (144,861 ) $ 92,477 Comprehensive income attributable to IAC shareholders $ 121,862 $ 42,343 $ 148,908 $ (191,251 ) $ 121,862 Statement of cash flows for the six months ended June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Net cash (used in) provided by operating activities $ (24,698 ) $ 418,153 $ 314,884 $ (328,537 ) $ 379,802 Cash flows from investing activities: Acquisitions, net of cash acquired (4,142 ) — (13,371 ) — (17,513 ) Capital expenditures (2,200 ) (847 ) (36,649 ) — (39,696 ) Proceeds from maturities and sales of marketable debt securities 10,000 — — — 10,000 Purchases of marketable debt securities (124,397 ) — — — (124,397 ) Purchases of investments (18,180 ) — (13,000 ) — (31,180 ) Net proceeds from the sale of investments and businesses 408 — 27,132 — 27,540 Other, net (5,000 ) 3,884 10,715 — 9,599 Net cash (used in) provided by investing activities (143,511 ) 3,037 (25,173 ) — (165,647 ) Cash flows from financing activities: Repurchases of IAC debt (363 ) — — — (363 ) Principal payments on ANGI Homeservices debt — — (6,875 ) — (6,875 ) Purchase of IAC treasury stock (7,869 ) — — — (7,869 ) Purchase of Match Group treasury stock — — (73,943 ) — (73,943 ) Proceeds from the exercise of IAC stock options 27,317 — — — 27,317 Proceeds from the exercise of Match Group and ANGI Homeservices stock options — — 2,125 — 2,125 Withholding taxes paid on behalf of IAC employees on net settled stock-based awards (495 ) — — — (495 ) Withholding taxes paid on behalf of Match Group and ANGI Homeservices employees on net settled stock-based awards — — (136,727 ) — (136,727 ) Purchase of noncontrolling interests — — (877 ) — (877 ) Acquisition-related contingent consideration payments — — (185 ) — (185 ) Intercompany 375,167 (421,190 ) (282,514 ) 328,537 — Other, net 2,674 — (7,487 ) — (4,813 ) Net cash provided by (used in) financing activities 396,431 (421,190 ) (506,483 ) 328,537 (202,705 ) Total cash provided (used) 228,222 — (216,772 ) — 11,450 Effect of exchange rate changes on cash, cash equivalents, and restricted cash 11 — 33 — 44 Net increase (decrease) in cash, cash equivalents, and restricted cash 228,233 — (216,739 ) — 11,494 Cash, cash equivalents, and restricted cash at beginning of period 585,639 — 1,048,043 — 1,633,682 Cash, cash equivalents, and restricted cash at end of period $ 813,872 $ — $ 831,304 $ — $ 1,645,176 Statement of cash flows for the six months ended June 30, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries IAC Consolidated (In thousands) Net cash (used in) provided by operating activities $ (40,671 ) $ 40,314 $ 158,071 $ 157,714 Cash flows from investing activities: Acquisitions, net of cash acquired — (2,200 ) (46,964 ) (49,164 ) Capital expenditures (216 ) (657 ) (40,948 ) (41,821 ) Proceeds from maturities and sales of marketable debt securities 99,350 — — 99,350 Purchases of marketable debt securities (24,909 ) — — (24,909 ) Purchases of investments — — (5,105 ) (5,105 ) Net proceeds from the sale of businesses and investments — — 119,697 119,697 Other, net — 120 956 1,076 Net cash provided by (used in) investing activities 74,225 (2,737 ) 27,636 99,124 Cash flows from financing activities: Repurchases of IAC debt (31,590 ) — — (31,590 ) Purchase of IAC treasury stock (56,424 ) — — (56,424 ) Proceeds from the exercise of IAC stock options 48,146 — — 48,146 Proceeds from the exercise of Match Group stock options — — 39,403 39,403 Withholding taxes paid on behalf of IAC employees on net settled stock-based awards (49,900 ) — — (49,900 ) Withholding taxes paid on behalf of Match Group employees on net settled stock-based awards — — (28,421 ) (28,421 ) Purchase of noncontrolling interests — — (12,361 ) (12,361 ) Acquisition-related contingent consideration payments — — (3,860 ) (3,860 ) Intercompany 54,316 (37,577 ) (16,739 ) — Other, net 251 — (5,124 ) (4,873 ) Net cash used in financing activities (35,201 ) (37,577 ) (27,102 ) (99,880 ) Total cash (used) provided (1,647 ) — 158,605 156,958 Effect of exchange rate changes on cash, cash equivalents, and restricted cash 36 — 5,438 5,474 Net (decrease) increase in cash, cash equivalents, and restricted cash (1,611 ) — 164,043 162,432 Cash, cash equivalents, and restricted cash at beginning of period 573,784 — 786,415 1,360,199 Cash, cash equivalents, and restricted cash at end of period $ 572,173 $ — $ 950,458 $ 1,522,631

THE COMPANY AND SUMMARY OF SI23

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	IAC is a leading media and Internet company composed of widely known consumer brands, such as Tinder, Match, PlentyOfFish and OkCupid, which are part of Match Group's online dating portfolio, and HomeAdvisor and Angie's List, which are operated by ANGI Homeservices, as well as Vimeo, Dotdash, Dictionary.com, The Daily Beast and Investopedia. All references to "IAC," the "Company," "we," "our" or "us" in this report are to IAC/InterActiveCorp.
Basis of Presentation	The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP"). 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. Investments in equity securities, other than those of our consolidated subsidiaries and those accounted for under the equity method, are accounted for at fair value or under the measurement alternative upon the adoption of Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities , on January 1, 2018, with changes recognized within other income (expense), net each reporting period. Under the measurement alternative, equity investments without readily determinable fair values are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. Under the measurement alternative, the value of our equity securities without determinable fair values is generally determined based on a market approach as of the transaction date. An investment will be considered identical or similar if it has identical or similar rights to the equity investments held by the Company. The Company reviews impairment of our equity securities each reporting period when there are qualitative indicators that may indicate impairment. Once the qualitative indicators are identified and the fair value of the security is less than its carrying value, the Company will write down the security to its fair value and record the corresponding charge within other income (expense), net. See " Accounting Pronouncements adopted by the Company" below for further information. In management's opinion, the unaudited interim consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and reflect all adjustments, consisting of normal and recurring adjustments, necessary for the fair presentation of our financial position, results of operations and cash flows for the periods presented. Interim results are not necessarily indicative of the results that may be expected for the full year. The accompanying unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017.
Accounting for Investments	The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles ("GAAP"). 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. Investments in equity securities, other than those of our consolidated subsidiaries and those accounted for under the equity method, are accounted for at fair value or under the measurement alternative upon the adoption of Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities , on January 1, 2018, with changes recognized within other income (expense), net each reporting period. Under the measurement alternative, equity investments without readily determinable fair values are carried at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. Under the measurement alternative, the value of our equity securities without determinable fair values is generally determined based on a market approach as of the transaction date. An investment will be considered identical or similar if it has identical or similar rights to the equity investments held by the Company. The Company reviews impairment of our equity securities each reporting period when there are qualitative indicators that may indicate impairment. Once the qualitative indicators are identified and the fair value of the security is less than its carrying value, the Company will write down the security to its fair value and record the corresponding charge within other income (expense), net. See " Accounting Pronouncements adopted by the Company" below for further information. In management's opinion, the unaudited interim consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements and reflect all adjustments, consisting of normal and recurring adjustments, necessary for the fair presentation of our financial position, results of operations and cash flows for the periods presented. Interim results are not necessarily indicative of the results that may be expected for the full year. The accompanying unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017.
Accounting Estimates	Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its consolidated financial statements in accordance with GAAP. These estimates, judgments and assumptions 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 recoverability of goodwill and indefinite-lived intangible assets; the useful lives and recoverability of definite-lived intangible assets and property and equipment; the fair values of marketable debt securities and equity securities without readily determinable fair values; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; the fair value of acquisition-related contingent consideration arrangements; unrecognized tax benefits; 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 meaningful 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"). The services agreement became effective on April 1, 2016, following the expiration of the previous services agreement, and expires on March 31, 2020; however, the Company may choose to terminate the agreement effective March 31, 2019. The services agreement requires that the Company comply with certain guidelines promulgated by Google. Google may generally unilaterally update its policies and guidelines without advance notice, which could in turn 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. Google recently announced policy changes related to its Chrome browser, effective in September 2018, which could hurt the distribution of our desktop products through the Chrome Web Store and could impact revenue and profits of some of the businesses within our Applications segment.
Recent Accounting Pronouncements	Accounting Pronouncements adopted by the Company In May 2014, the FASB ASU No. 2014-09, Revenue from Contracts with Customers . ASU No. 2014-09 supersedes nearly all existing revenue recognition guidance under GAAP. The Company adopted ASU No. 2014-09 effective January 1, 2018 using the modified retrospective transition method for open contracts as of the date of initial application. The cumulative impact to the Company's retained earnings at January 1, 2018 was $40.2 million , of which $3.4 million was related to the Company's noncontrolling interest in ANGI; the adjustment to retained earnings was principally related to the Company’s ANGI Homeservices and Applications segments. • Within ANGI, the effect of the adoption of ASU No. 2014-09 is that commissions paid to employees pursuant to certain sales incentive programs, which represent the incremental direct costs of obtaining a service professional contract, are now capitalized and amortized over the estimated life of a service professional (also referred to as the estimated customer relationship period). These costs were expensed as incurred prior to January 1, 2018. The cumulative effect of the adoption of ASU No. 2014-09 was the establishment of a current and non-current asset for capitalized sales commissions of $29.7 million and $4.2 million , respectively, and a related deferred tax liability of $8.0 million , resulting in a net increase to retained earnings of $25.9 million on January 1, 2018. • Within Applications, the primary effect of the adoption of ASU No. 2014-09 is to accelerate the recognition of the portion of the revenue of certain desktop applications sold by SlimWare that qualifies as functional intellectual property ("functional IP") under ASU No. 2014-09. This revenue was previously deferred and recognized over the applicable subscription term. The cumulative effect of the adoption of ASU No. 2014-09 for SlimWare was a reduction in deferred revenue of $20.3 million and the establishment of a deferred tax liability of $4.9 million , resulting in a net increase to retained earnings of $15.5 million on January 1, 2018. The adoption of ASU No. 2014-09 will not have a material effect on the Company’s results of operations for the year ending December 31, 2018. See " Note 2—Revenue Recognition " for additional information on the impact to the Company. The Company's disaggregated revenue disclosures are presented in " Note 10—Segment information ." The following tables present the impact of the adoption of ASU No. 2014-09 by segment under Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers , as reported, and ASC 605, Revenue Recognition , for the three and six months ended June 30, 2018. Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Revenue by segment: Match Group $ 421,196 $ 421,196 $ — $ 828,563 $ 828,563 $ — ANGI Homeservices 294,822 294,822 — 550,133 550,133 — Video 62,757 63,018 (261 ) 128,919 129,609 (690 ) Applications 143,074 144,842 (1,768 ) 275,061 276,359 (1,298 ) Publishing 137,355 137,355 — 271,677 271,677 — Inter-segment eliminations (82 ) (82 ) — (156 ) (156 ) — Total $ 1,059,122 $ 1,061,151 $ (2,029 ) $ 2,054,197 $ 2,056,185 $ (1,988 ) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Operating costs and expenses by segment: Match Group $ 271,031 $ 271,031 $ — $ 566,165 $ 566,165 $ — ANGI Homeservices 271,560 273,678 (2,118 ) 537,627 545,838 (8,211 ) Video 77,739 77,739 — 159,776 160,003 (227 ) Applications 109,997 109,291 706 216,523 215,298 1,225 Publishing 124,548 124,548 — 243,059 243,059 — Corporate 35,810 35,810 — 72,660 72,660 — Total $ 890,685 $ 892,097 $ (1,412 ) $ 1,795,810 $ 1,803,023 $ (7,213 ) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Operating income (loss) by segment: Match Group $ 150,165 $ 150,165 $ — $ 262,398 $ 262,398 $ — ANGI Homeservices 23,262 21,144 2,118 12,506 4,295 8,211 Video (14,982 ) (14,721 ) (261 ) (30,857 ) (30,394 ) (463 ) Applications 33,077 35,551 (2,474 ) 58,538 61,061 (2,523 ) Publishing 12,807 12,807 — 28,618 28,618 — Corporate (35,892 ) (35,892 ) — (72,816 ) (72,816 ) — Total $ 168,437 $ 169,054 $ (617 ) $ 258,387 $ 253,162 $ 5,225 Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Net earnings $ 280,854 $ 281,269 $ (415 ) $ 368,693 $ 364,786 $ 3,907 In January 2016, the FASB issued ASU No. 2016-01, which updates certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Under ASU No. 2016-01, equity securities, other than those of our consolidated subsidiaries and those accounted for under the equity method, will be measured at fair value with changes in fair value recognized in the statement of operations each reporting period. ASU No. 2016-01 is effective for reporting periods beginning after December 15, 2017. There was no cumulative impact to the Company's consolidated financial statements upon adoption of ASU No. 2016-01 on January 1, 2018. The adoption of ASU No. 2016-01 increases the volatility of the Company's other income (expense), net as a result of the remeasurement of these instruments. For the three and six months ended June 30, 2018 , other income, net includes net unrealized gains related to certain equity securities that were adjusted to fair value in accordance with ASU No. 2016-01 of $126.4 million and $126.6 million , respectively. See " Note 6—Fair Value Measurements and Financial Instruments " for additional information. In November 2016, the FASB issued ASU No. 2016-18, Restricted Cash , which requires companies to explain the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. Therefore, amounts generally described as restricted cash or restricted cash equivalents are combined with unrestricted cash and cash equivalents when reconciling the beginning and end of period balances on the statement of cash flows. ASU No. 2016-18 also requires companies to disclose the nature of their restricted cash and restricted cash equivalents balances. Additionally, when cash, cash equivalents, restricted cash, and restricted cash equivalents are presented within different captions on the balance sheet, a reconciliation of the totals in the statement of cash flows to the related captions in the balance sheet is required. ASU No. 2016-18 is effective for reporting periods beginning after December 15, 2017. The Company's adoption of ASU No. 2016-18 effective January 1, 2018, on a retrospective basis, did not have a material effect on its consolidated financial statements. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheet to the total amounts shown in the consolidated statement of cash flows: June 30, 2018 December 31, 2017 June 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 1,644,829 $ 1,630,809 $ 1,522,300 $ 1,329,187 Restricted cash included in other current assets 347 2,873 331 20,464 Restricted cash included in other assets — — — 10,548 Total cash, cash equivalents and restricted cash as shown on the consolidated statement of cash flows $ 1,645,176 $ 1,633,682 $ 1,522,631 $ 1,360,199 Restricted cash at December 31, 2017 primarily supports a letter of credit to a supplier, which was released to the Company in the second quarter of 2018. Restricted cash at December 31, 2016 primarily included funds held in escrow for the redemption and repurchase of IAC Senior Notes and the MyHammer tender offer. In the first quarter of 2017, the Senior Notes were redeemed and repurchased and the funds held in escrow for the MyHammer tender offer were returned to the Company. In June 2018, the FASB issued ASU No. 2018-07, Improvements to Nonemployee Share-Based Payment Accounting , which largely aligns the measurement and classification guidance for share-based payments granted to non-employees with the guidance for share-based payments granted to employees. The new guidance supersedes Subtopic 505-50, Equity - Equity-Based payments to Nonemployees . ASU No. 2018-07 is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The Company adopted ASU No. 2018-07 effective April 1, 2018 and its adoption did not have a material effect on its consolidated financial statements. The effect of the adoption of ASU No. 2018-07 will be to minimize the volatility of expense related to stock-based awards to non-employees in the future. Accounting Pronouncement not yet adopted by the Company In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) , which supersedes existing guidance on accounting for leases in "Leases (Topic 840)" and generally requires all leases to be recognized in the statement of financial position. The provisions of ASU No. 2016-02 are effective for reporting periods beginning after December 15, 2018; early adoption is permitted. In July 2018, the FASB issued ASU No. 2018-11, which provides the option of an additional transition method that allows entities to initially apply the new lease guidance at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company expects to implement the transition method option provided by ASU No. 2018-11. The Company will adopt the new lease guidance effective January 1, 2019. The Company is not a lessor, has no capitalized leases and does not expect to enter into any capitalized leases prior to the adoption of ASU No. 2016-02. Accordingly, the Company does not expect the amount or classification of rent expense in its statement of operations to be affected by the adoption of ASU No. 2016-02. The primary effect of the adoption of ASU No. 2016-02 will be the recognition of a right of use asset and related liability to reflect the Company's rights and obligations under its operating leases. The Company will also be required to provide the additional disclosures stipulated in ASU No. 2016-02. The adoption of ASU No. 2016-02 will not have an impact on the leverage calculation set forth in any of the agreements governing the outstanding debt of the Company or its MTCH and ANGI subsidiaries, or our credit agreement or the credit agreement of MTCH because, in each circumstance, the leverage calculations are not affected by the liability that will be recorded upon adoption of the new standard. While the Company's evaluation of the impact of the adoption of ASU No. 2016-02 on its consolidated financial statements continues, outlined below is a summary of the status of the Company's progress: • the Company has selected a software package to assist in the determination of the right of use asset and related liability as of January 1, 2019 and to provide the required information following the adoption; • the Company has prepared summaries of its leases for input into the software package; • the Company is assessing the other inputs required in connection with the adoption of ASU No. 2016-02; and • the Company is developing its accounting policy, procedures and controls related to the new standard. The Company does not expect to have a preliminary estimate of the right of use asset and related liability as of the adoption date until the fourth quarter of 2018.
Reclassifications	Certain prior year amounts have been reclassified to conform to the current year presentation.
General Revenue Recognition	General Revenue Recognition The Company accounts for a contract when it has approval and commitment from all parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when control of the promised services or goods is transferred to our customers, and in an amount that reflects the consideration the Company is contractually due in exchange for those services or goods. Match Group Match Group’s revenue is primarily derived directly from users in the form of recurring subscriptions. Subscription revenue is presented net of credits and credit card chargebacks. Subscribers pay in advance, primarily by credit card or through mobile app stores, and, subject to certain conditions identified in our terms and conditions, generally all purchases are final and nonrefundable. Revenue is initially deferred and is recognized using the straight-line method over the term of the applicable subscription period, which primarily range from one to six months. Revenue is also earned from online advertising, the purchase of à la carte features and offline events. Online advertising revenue is recognized when an advertisement is displayed. Revenue from the purchase of à la carte features is recognized based on usage. Revenue associated with offline events is recognized when each event occurs. ANGI Homeservices ANGI revenue is primarily derived from (i) consumer connection revenue, which comprises fees paid by service professionals for consumer matches (regardless of whether the professional ultimately provides the requested service), and (ii) membership subscription fees paid by service professionals. Consumer connection revenue varies based upon several factors, including the service requested, type of match and geographic location of service. The Company’s consumer connection revenue is generated and recognized when an in-network service professional is delivered a consumer match. Membership subscription revenue from service professionals is initially deferred and is recognized using the straight-line method over the applicable subscription period, which is typically one year. Consumer connection revenue is generally billed one week following a consumer match; with payment due upon receipt of invoice. ANGI revenue is also derived from Angie's List (i) sales of time-based website, mobile and call center advertising to service professionals and (ii) membership subscription fees from consumers. Angie's List service professionals generally pay for advertisements in advance on a monthly or annual basis at the option of the service professional, with the average advertising contract term being approximately one year. Angie's List website, mobile and call center advertising revenue is recognized ratably over the contract term. Revenue from the sale of advertising in the Angie’s List Magazine is recognized in the period in which the publication is distributed. Angie's List prepaid consumer membership subscription fees are recognized as revenue using the straight-line method over the term of the applicable subscription period, which is typically one year. Video Revenue of businesses in this segment is generated primarily through subscriptions, media production and distribution, and advertising. Subscription fee revenue is recognized over the terms of the applicable subscription period, which are one month or one year, production revenue is recognized when control is transferred to the customer to broadcast or exhibit, and advertising revenue is recognized when an advertisement is displayed or over the advertising period. Applications Applications' revenue largely consists of advertising revenue generated principally through the display of paid listings in response to search queries. The substantial majority of the paid listings displayed by our Applications businesses are supplied to us by Google pursuant to our services agreement with Google. Pursuant to this agreement, those of our Applications businesses that provide search services transmit search queries to Google, which in turn transmits a set of relevant and responsive paid listings back to these businesses for display in search results. This ad-serving process occurs independently of, but concurrently with, the generation of algorithmic search results for the same search queries. Google paid listings are displayed separately from algorithmic search results and are identified as sponsored listings on search results pages. Paid listings are priced on a price per click basis and when a user submits a search query through one of our Applications businesses and then clicks on a Google paid listing displayed in response to the query, Google bills the advertiser that purchased the paid listing directly and shares a portion of the fee charged to the advertiser with us. The Company recognizes paid listing revenue from Google when it delivers the user's click. In cases where the user’s click is generated due to the efforts of a third-party distributor, we recognize the amount due from Google as revenue and record a revenue share or other payment obligation to the third-party distributor as traffic acquisition costs. To a significantly lesser extent, Applications' revenue also consists of fees related to subscription downloadable desktop and mobile applications as well as display advertisements. Fees related to subscription downloadable desktop and paid mobile applications are generally recognized at the time of the sale when the software license is delivered. To the extent updates or maintenance is required or expected, revenue is recognized over the term of the applicable subscription period, which is primarily one or two years. Fees related to display advertisements are recognized when an advertisement is displayed. Publishing Publishing's revenue consists principally of advertising revenue, which is generated primarily through the display of paid listings in response to search queries and display advertisements (sold directly and through programmatic ad sales). The majority of the paid listings that our Publishing businesses display are supplied to us by Google in the manner, and pursuant to the services agreement with Google, described above under " Applications. " Transaction Price The objective of determining the transaction price is to estimate the amount of consideration the Company is due in exchange for its services or goods, including amounts that are variable. The Company determines the total transaction price, including an estimate of any variable consideration, at contract inception and reassesses this estimate each reporting period. The Company excludes from the measurement of transaction price all taxes assessed by governmental authorities that are both (i) imposed on and concurrent with a specific revenue-producing transaction and (ii) collected from customers. Accordingly, such tax amounts are not included as a component of revenue or cost of revenue. For contracts that have an original duration of one year or less, the Company uses the practical expedient available under ASU No. 2014-09 applicable to such contracts and does not consider the time value of money. Accounts Receivables, net of allowance for doubtful accounts and revenue reserves Accounts receivable include amounts billed and currently due from customers. The Company maintains an allowance for doubtful accounts to provide for the estimated amount of accounts receivables that will not be collected. The allowance for doubtful accounts is based upon a number of factors, including the length of time accounts receivable are past due, the Company’s previous loss history and the specific customer’s ability to pay its obligation. The time between the Company issuance of an invoice and payments due date is not significant; customer payments that are not collected in advance of the transfer of promised services or goods are generally due no later than 30 days from invoice date. The Company also maintains allowances to reserve for potential credits issued to consumers or other revenue adjustments. The amounts of these reserves are based primarily upon historical experience. Deferred Revenue Deferred revenue consists of advance payments that are received or due in advance of the Company's performance. The Company’s liabilities are reported on a contract by contract basis at the end of each reporting period. The Company generally classifies deferred revenue as current when the term of the applicable subscription period or expected completion of our performance obligation is one year or less. The deferred revenue balance as of January 1, 2018 is $332.2 million . During the three months ended June 30, 2018 , the Company recognized $224.0 million of revenue that was included in the deferred revenue balance as of April 1, 2018. During the six months ended June 30, 2018 , the Company recognized $278.8 million of revenue that was included in the deferred revenue balance as of January 1, 2018. The current and non-current deferred revenue balances at June 30, 2018 are $375.1 million and $2.0 million , respectively. Non-current deferred revenue is included in “Other long-term liabilities” in the accompanying consolidated balance sheet. Arrangements with Multiple Performance Obligations The Company’s contracts with customers may include multiple performance obligations. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on the prices charged to customers, which are directly observable or based on an estimate if not directly observable. For our multiple performance obligation arrangements that include functional intellectual property ("IP"), which comprise the downloadable apps and software of the Applications segment, the Company uses a residual approach to determine standalone selling prices for the functional IP. Assets Recognized from the Costs to Obtain a Contract with a Customer The Company has determined that certain costs, primarily commissions paid to employees pursuant to certain sales incentive programs and mobile app store fees, meet the requirements to be capitalized as a cost of obtaining a contract. Commissions paid to employees pursuant to certain sales incentive programs are amortized over the estimated customer relationship period. The Company calculates the estimated customer relationship period as the average customer life, which is based on historical data. When customer renewals are expected and the renewal commission is not commensurate with the initial commission, the average customer life includes renewal periods. For sales incentive programs where the customer relationship period is one year or less, the Company has elected the practical expedient to expense the costs as incurred. The Company generally capitalizes and amortizes mobile app store fees over the term of the applicable subscription. During the three and six months ended June 30, 2018 , the Company recognized expense of $84.7 million and $159.8 million , respectively, related to the amortization of these costs. The contract asset balance at June 30, 2018 is $72.8 million . Performance Obligations As permitted under the practical expedient available under ASU No. 2014-09, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance, and (iii) contracts for which the Company recognizes revenue at the amount which we have the right to invoice for services performed.

THE COMPANY AND SUMMARY OF SI24

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	6 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The following tables present the impact of the adoption of ASU No. 2014-09 by segment under Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers , as reported, and ASC 605, Revenue Recognition , for the three and six months ended June 30, 2018. Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Revenue by segment: Match Group $ 421,196 $ 421,196 $ — $ 828,563 $ 828,563 $ — ANGI Homeservices 294,822 294,822 — 550,133 550,133 — Video 62,757 63,018 (261 ) 128,919 129,609 (690 ) Applications 143,074 144,842 (1,768 ) 275,061 276,359 (1,298 ) Publishing 137,355 137,355 — 271,677 271,677 — Inter-segment eliminations (82 ) (82 ) — (156 ) (156 ) — Total $ 1,059,122 $ 1,061,151 $ (2,029 ) $ 2,054,197 $ 2,056,185 $ (1,988 ) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Operating costs and expenses by segment: Match Group $ 271,031 $ 271,031 $ — $ 566,165 $ 566,165 $ — ANGI Homeservices 271,560 273,678 (2,118 ) 537,627 545,838 (8,211 ) Video 77,739 77,739 — 159,776 160,003 (227 ) Applications 109,997 109,291 706 216,523 215,298 1,225 Publishing 124,548 124,548 — 243,059 243,059 — Corporate 35,810 35,810 — 72,660 72,660 — Total $ 890,685 $ 892,097 $ (1,412 ) $ 1,795,810 $ 1,803,023 $ (7,213 ) Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Operating income (loss) by segment: Match Group $ 150,165 $ 150,165 $ — $ 262,398 $ 262,398 $ — ANGI Homeservices 23,262 21,144 2,118 12,506 4,295 8,211 Video (14,982 ) (14,721 ) (261 ) (30,857 ) (30,394 ) (463 ) Applications 33,077 35,551 (2,474 ) 58,538 61,061 (2,523 ) Publishing 12,807 12,807 — 28,618 28,618 — Corporate (35,892 ) (35,892 ) — (72,816 ) (72,816 ) — Total $ 168,437 $ 169,054 $ (617 ) $ 258,387 $ 253,162 $ 5,225 Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 Under ASC 606 Under ASC 605 Effect of adoption of ASU No. 2014-09 (In thousands) Net earnings $ 280,854 $ 281,269 $ (415 ) $ 368,693 $ 364,786 $ 3,907
Schedule of Cash, Cash Equivalents, and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheet to the total amounts shown in the consolidated statement of cash flows: June 30, 2018 December 31, 2017 June 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 1,644,829 $ 1,630,809 $ 1,522,300 $ 1,329,187 Restricted cash included in other current assets 347 2,873 331 20,464 Restricted cash included in other assets — — — 10,548 Total cash, cash equivalents and restricted cash as shown on the consolidated statement of cash flows $ 1,645,176 $ 1,633,682 $ 1,522,631 $ 1,360,199
Schedule of Cash, Cash Equivalents, and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheet to the total amounts shown in the consolidated statement of cash flows: June 30, 2018 December 31, 2017 June 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 1,644,829 $ 1,630,809 $ 1,522,300 $ 1,329,187 Restricted cash included in other current assets 347 2,873 331 20,464 Restricted cash included in other assets — — — 10,548 Total cash, cash equivalents and restricted cash as shown on the consolidated statement of cash flows $ 1,645,176 $ 1,633,682 $ 1,522,631 $ 1,360,199

BUSINESS COMBINATION (Tables)

BUSINESS COMBINATION (Tables)	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Schedule of Pro Forma Financial Information	The unaudited pro forma financial information in the table below presents the combined results of the Company and Angie's List as if the Combination had occurred on January 1, 2016. The unaudited pro forma financial information includes adjustments required under the acquisition method of accounting and is presented for informational purposes only and is not necessarily indicative of the results that would have been achieved had the Combination actually occurred on January 1, 2016. For the three and six months ended June 30, 2017 , pro forma adjustments include increases in stock-based compensation expense of $11.6 million and $26.3 million , respectively, and amortization of intangibles of $11.5 million and $23.1 million , respectively. Three Months Ended Six Months Ended (In thousands, except per share data) Revenue $ 839,729 $ 1,673,023 Net earnings attributable to IAC shareholders $ 53,996 $ 67,335 Basic earnings per share attributable to IAC shareholders $ 0.68 $ 0.86 Diluted earnings per share attributable to IAC shareholders $ 0.55 $ 0.69

MARKETABLE SECURITIES (Tables)

MARKETABLE SECURITIES (Tables)	6 Months Ended
	Jun. 30, 2018
Marketable Securities [Abstract]
Schedule of Fair Value of Marketable Securities	At June 30, 2018 and December 31, 2017 , the fair value of marketable securities are as follows: June 30, 2018 December 31, 2017 (In thousands) Available-for-sale marketable debt securities $ 119,746 $ 4,995 Marketable equity security 664 — Total marketable securities $ 120,410 $ 4,995
Schedule of Current Available-for-sale Marketable Securities	At June 30, 2018 , current available-for-sale marketable debt securities are as follows: Amortized Gross Gross Fair Value (In thousands) Treasury discount notes $ 99,795 $ 6 $ — $ 99,801 Commercial paper 19,945 — — 19,945 Total available-for-sale marketable debt securities $ 119,740 $ 6 $ — $ 119,746 At December 31, 2017 , current available-for-sale marketable debt securities are as follows: Amortized Gross Gross Fair Value (In thousands) Commercial paper $ 4,995 $ — $ — $ 4,995 Total available-for-sale marketable debt securities $ 4,995 $ — $ — $ 4,995
Schedule of Proceeds from Maturities and Sales of Available-for-sale Marketable Debt Securities	The following table presents the proceeds from maturities and sales of available-for-sale marketable debt securities: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Proceeds from maturities and sales of available-for-sale marketable debt securities $ 5,000 $ 24,000 $ 10,000 $ 99,350

FAIR VALUE MEASUREMENTS AND F27

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2018
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: June 30, 2018 Quoted Market Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Measurements (In thousands) Assets: Cash equivalents: Money market funds $ 726,865 $ — $ — $ 726,865 Commercial paper — 191,852 — 191,852 Treasury discount notes 162,322 — — 162,322 Time deposits — 80,037 — 80,037 Certificates of deposit — 960 — 960 Marketable securities: Treasury discount notes — 99,801 $ — 99,801 Commercial paper — 19,945 — 19,945 Marketable equity security 664 — — 664 Total $ 889,851 $ 392,595 $ — $ 1,282,446 Liabilities: Contingent consideration arrangements $ — $ — $ (1,910 ) $ (1,910 ) December 31, 2017 Quoted Market Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Measurements (In thousands) Assets: Cash equivalents: Money market funds $ 780,425 $ — $ — $ 780,425 Commercial paper — 215,325 — 215,325 Treasury discount notes 100,457 — — 100,457 Time deposits — 60,000 — 60,000 Certificates of deposit — 6,195 — 6,195 Marketable securities: Commercial paper — 4,995 — 4,995 Total $ 880,882 $ 286,515 $ — $ 1,167,397 Liabilities: Contingent consideration arrangements $ — $ — $ (2,647 ) $ (2,647 )
Schedule of Changes in Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)	The Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are its contingent consideration arrangements. Contingent Consideration Arrangements Three Months Ended June 30, 2018 2017 (In thousands) Balance at April 1 $ (1,965 ) $ (21,821 ) Total net losses: Included in earnings: Fair value adjustments (54 ) (2,994 ) Included in other comprehensive income (loss) 109 (14 ) Balance at June 30 $ (1,910 ) $ (24,829 ) Contingent Consideration Arrangements Six Months Ended June 30, 2018 2017 (In thousands) Balance at January 1 $ (2,647 ) $ (33,871 ) Total net losses: Included in earnings: Fair value adjustments (210 ) (4,885 ) Included in other comprehensive loss (1 ) (1,073 ) Settlements 948 15,000 Balance at June 30 $ (1,910 ) $ (24,829 )
Schedule of Changes in Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)	The Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are its contingent consideration arrangements. Contingent Consideration Arrangements Three Months Ended June 30, 2018 2017 (In thousands) Balance at April 1 $ (1,965 ) $ (21,821 ) Total net losses: Included in earnings: Fair value adjustments (54 ) (2,994 ) Included in other comprehensive income (loss) 109 (14 ) Balance at June 30 $ (1,910 ) $ (24,829 ) Contingent Consideration Arrangements Six Months Ended June 30, 2018 2017 (In thousands) Balance at January 1 $ (2,647 ) $ (33,871 ) Total net losses: Included in earnings: Fair value adjustments (210 ) (4,885 ) Included in other comprehensive loss (1 ) (1,073 ) Settlements 948 15,000 Balance at June 30 $ (1,910 ) $ (24,829 )
Schedule of Realized and Unrealized Gains and Losses	The following table presents a summary of realized and unrealized gains and losses recorded in other income (expense), net, as adjustments to the carrying value of equity securities without readily determinable fair values held as of June 30, 2018. The gross unrealized gains relate to the Company's remaining investments in an investee following the sale of a portion of the Company's investment during the second quarter of 2018. Three Months Ended Six Months Ended (In thousands) Upward adjustments (gross unrealized gains) $ 128,786 $ 128,786 Downward adjustments (including impairment) (gross unrealized losses) (2,396 ) (2,588 ) Total $ 126,390 $ 126,198 Realized and unrealized gains and losses for the Company's marketable equity security and investments without a readily determinable fair value for the three and six months ended June 30, 2018 are as follows: Three Months Ended Six Months Ended (In thousands) Realized gains, net, for equity securities sold $ 27,275 $ 27,172 Unrealized gains, net, on equity securities held 126,414 126,559 Total gains recognized, net, in other income, net $ 153,689 $ 153,731
Schedule of Carrying Value and the Fair Value of Financial Instruments Measured at Fair Value Only for Disclosure Purposes	The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes: June 30, 2018 December 31, 2017 Carrying Fair Carrying Fair (In thousands) Current portion of long-term debt $ (13,750 ) $ (13,613 ) $ (13,750 ) $ (13,802 ) Long-term debt, net (1,982,271 ) (2,156,890 ) (1,979,469 ) (2,168,108 )

LONG-TERM DEBT (Tables)

LONG-TERM DEBT (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consists of: June 30, 2018 December 31, 2017 (In thousands) MTCH Debt: MTCH Term Loan due November 16, 2022 $ 425,000 $ 425,000 6.375% Senior Notes due June 1, 2024 (the "6.375% MTCH Senior Notes"); interest payable each June 1 and December 1 400,000 400,000 5.00% Senior Notes due December 15, 2027 (the "5.00% MTCH Senior Notes"); interest payable each June 15 and December 15 450,000 450,000 Total MTCH long-term debt 1,275,000 1,275,000 Less: unamortized original issue discount 8,010 8,668 Less: unamortized debt issuance costs 12,725 13,636 Total MTCH debt, net 1,254,265 1,252,696 ANGI Debt: ANGI Term Loan due November 1, 2022 268,125 275,000 Less: current portion of ANGI Term Loan 13,750 13,750 Less: unamortized debt issuance costs 2,635 2,938 Total ANGI debt, net 251,740 258,312 IAC Debt: 0.875% Exchangeable Senior Notes due October 1, 2022 (the "Exchangeable Notes"); interest payable each April 1 and October 1 517,500 517,500 4.75% Senior Notes due December 15, 2022 (the "4.75% Senior Notes"); interest payable each June 15 and December 15 34,489 34,859 Total IAC long-term debt 551,989 552,359 Less: unamortized original issue discount 60,654 67,158 Less: unamortized debt issuance costs 15,069 16,740 Total IAC debt, net 476,266 468,461 Total long-term debt, net $ 1,982,271 $ 1,979,469

ACCUMULATED OTHER COMPREHENSI29

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive (Loss) Income	The following tables present the components of accumulated other comprehensive (loss) income and items reclassified out of accumulated other comprehensive loss into earnings: Three Months Ended June 30, 2018 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive Loss (In thousands) Balance as of April 1 $ (74,950 ) $ — $ (74,950 ) Other comprehensive (loss) income before reclassifications (37,589 ) 13 (37,576 ) Amounts reclassified to earnings (191 ) — (191 ) Net current period other comprehensive (loss) income (37,780 ) 13 (37,767 ) Balance as of June 30 $ (112,730 ) $ 13 $ (112,717 ) Three Months Ended June 30, 2017 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive (Loss) Income (In thousands) Balance as of April 1 $ (151,373 ) $ 4,028 $ (147,345 ) Other comprehensive income before reclassifications 14,664 5 14,669 Amounts reclassified to earnings (29 ) (4,033 ) (a) (4,062 ) Net current period other comprehensive income (loss) 14,635 (4,028 ) 10,607 Balance as of June 30 $ (136,738 ) $ — $ (136,738 ) ___________________________________________________________________________________________ (a) Amount includes a tax benefit of $3.8 million . Six Months Ended June 30, 2018 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive (Loss) Income (In thousands) Balance as of January 1 $ (103,568 ) $ — $ (103,568 ) Other comprehensive (loss) income before reclassifications (9,110 ) 13 (9,097 ) Amounts reclassified to earnings (52 ) — (52 ) Net current period other comprehensive (loss) income (9,162 ) 13 (9,149 ) Balance as of June 30 $ (112,730 ) $ 13 $ (112,717 ) Six Months Ended June 30, 2017 Foreign Currency Translation Adjustment Unrealized Gains On Available-For-Sale Securities Accumulated Other Comprehensive (Loss) Income (In thousands) Balance as of January 1 $ (170,149 ) $ 4,026 $ (166,123 ) Other comprehensive income before reclassifications 32,726 7 32,733 Amounts reclassified to earnings 685 (4,033 ) (b) (3,348 ) Net current period other comprehensive income (loss) 33,411 (4,026 ) 29,385 Balance as of June 30 $ (136,738 ) $ — $ (136,738 ) ___________________________________________________________________________________________ (b) Amount includes a tax benefit of $3.8 million .

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Earnings (Loss) Per Share	The following table sets forth the computation of basic and diluted earnings per share attributable to IAC shareholders: Three Months Ended June 30, 2018 2017 Basic Diluted Basic Diluted (In thousands, except per share data) Numerator: Net earnings $ 280,854 $ 280,854 $ 80,557 $ 80,557 Net earnings attributable to noncontrolling interests (62,501 ) (62,501 ) (14,289 ) (14,289 ) Impact from public subsidiaries' dilutive securities (a) — (6,994 ) — (7,925 ) Net earnings attributable to IAC shareholders $ 218,353 $ 211,359 $ 66,268 $ 58,343 Denominator: Weighted average basic shares outstanding 83,604 83,604 79,067 79,067 Dilutive securities (a) (b) (c) (d) — 7,330 — 4,711 Denominator for earnings per share—weighted average shares (a) (b) (c) (d) 83,604 90,934 79,067 83,778 Earnings per share attributable to IAC shareholders: Earnings per share $ 2.61 $ 2.32 $ 0.84 $ 0.70 Six Months Ended June 30, 2018 2017 Basic Diluted Basic Diluted (In thousands, except per share data) Numerator: Net earnings $ 368,693 $ 368,693 $ 109,020 $ 109,020 Net earnings attributable to noncontrolling interests (79,258 ) (79,258 ) (16,543 ) (16,543 ) Impact from public subsidiaries' dilutive securities (a) — (12,569 ) — (10,355 ) Net earnings attributable to IAC shareholders $ 289,435 $ 276,866 $ 92,477 $ 82,122 Denominator: Weighted average basic shares outstanding 83,296 83,296 78,633 78,633 Dilutive securities (a) (b) (c) (d) — 7,438 — 4,510 Denominator for earnings per share—weighted average shares (a) (b) (c) (d) 83,296 90,734 78,633 83,143 Earnings per share attributable to IAC shareholders: Earnings per share $ 3.47 $ 3.05 $ 1.18 $ 0.99 ________________________ (a) For the three and six months ended June 30, 2018 , it is more dilutive for IAC to settle certain MTCH and ANGI equity awards. For the three and six months ended June 30, 2017, it is more dilutive for MTCH to settle certain MTCH equity awards. The impact from ANGI’s dilutive securities is not applicable for periods prior to the Combination. (b) 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, warrants and subsidiary denominated equity, exchange of the Company's Exchangeable Notes and vesting of restricted stock units ("RSUs"). For the three and six months ended June 30, 2018 , 3.4 million and 6.9 million potentially dilutive securities, respectively, are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. For the three and six months ended June 30, 2017, less than 0.1 million and 0.5 million potentially dilutive securities, respectively, are excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. (c) Market-based awards and performance-based stock units (“PSUs”) are considered contingently issuable shares. Shares issuable upon exercise or vesting of market-based awards and PSUs are included in the denominator for earnings per share if (i) the applicable market or performance condition(s) has been met and (ii) the inclusion of the market-based awards and PSUs is dilutive for the respective reporting periods. For both the three and six months ended June 30, 2018 , 0.2 million shares underlying market-based awards and PSUs were excluded from the calculation of diluted earnings per share because the market or performance conditions had not been met. For both the three and six months ended June 30, 2017, 0.4 million shares underlying market-based awards and PSUs were excluded from the calculation of diluted earnings per share because the market or performance conditions had not been met. (d) It is the Company's intention to settle the Exchangeable Notes through a combination of cash, equal to the face amount of the notes, and shares; therefore, the Exchangeable Notes are only dilutive for periods during which the average price of IAC common stock exceeds the approximate $152.18 per share exchange price per $1,000 principal amount of the Exchangeable Notes.

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information	Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Revenue: Match Group $ 421,196 $ 309,572 $ 828,563 $ 608,336 ANGI Homeservices 294,822 180,711 550,133 331,456 Video 62,757 55,182 128,919 105,759 Applications 143,074 143,969 275,061 302,866 Publishing 137,355 78,124 271,677 156,204 Other (a) — — — 23,980 Inter-segment eliminations (82 ) (171 ) (156 ) (381 ) Total $ 1,059,122 $ 767,387 $ 2,054,197 $ 1,528,220 ___________________ (a) The 2017 results at the Other segment consists of the results of The Princeton Review prior to its sale on March 31, 2017. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Operating Income (Loss): Match Group $ 150,165 $ 82,975 $ 262,398 $ 141,846 ANGI Homeservices 23,262 (4,141 ) 12,506 (2,753 ) Video (14,982 ) (7,829 ) (30,857 ) (23,418 ) Applications 33,077 39,134 58,538 71,902 Publishing 12,807 (2,857 ) 28,618 (8,645 ) Other — — — (5,621 ) Corporate (35,892 ) (31,647 ) (72,816 ) (60,616 ) Total $ 168,437 $ 75,635 $ 258,387 $ 112,695 Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Adjusted EBITDA: (b) Match Group $ 175,561 $ 109,910 $ 313,302 $ 196,141 ANGI Homeservices $ 66,979 $ 13,666 $ 103,619 $ 23,878 Video $ (11,102 ) $ (6,832 ) $ (24,042 ) $ (21,564 ) Applications $ 35,404 $ 40,546 $ 62,156 $ 75,479 Publishing $ 13,755 $ 2,740 $ 30,968 $ 3,919 Other $ — $ — $ — $ (1,532 ) Corporate $ (15,552 ) $ (15,523 ) $ (32,560 ) $ (29,838 ) ________________________ (b) The Company's primary financial measure is Adjusted EBITDA, which is defined as operating income excluding: (1) stock-based compensation expense; (2) depreciation; and (3) acquisition-related items consisting of (i) amortization of intangible assets and impairments of goodwill and intangible assets, if applicable, 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 businesses, and this measure is one of the primary metrics on which our internal budgets are based and by which management is compensated. The above items are excluded from our Adjusted EBITDA measure because these items are non-cash in nature. Adjusted EBITDA has certain limitations in that it does not take into account the impact to IAC's statement of operations of certain expenses. The following table presents the revenue of the Company's segments disaggregated by type of service: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Match Group Direct revenue: North America $ 222,163 $ 178,505 $ 433,520 $ 353,833 International 185,564 120,918 366,944 233,342 Direct revenue 407,727 299,423 800,464 587,175 Indirect revenue (principally advertising revenue) 13,469 10,149 28,099 21,161 Total Match Group revenue $ 421,196 $ 309,572 $ 828,563 $ 608,336 ANGI Homeservices Marketplace: Consumer connection revenue $ 187,172 $ 141,163 $ 336,232 $ 257,163 Membership subscription revenue 16,565 13,704 32,192 26,456 Other revenue 998 888 1,919 1,780 Marketplace revenue 204,735 155,755 370,343 285,399 Advertising & Other revenue 72,770 9,736 143,188 18,164 North America 277,505 165,491 513,531 303,563 Consumer connection revenue 12,496 11,170 26,863 19,635 Membership subscription revenue 4,517 3,872 9,188 7,878 Other revenue 304 178 551 380 Europe 17,317 15,220 36,602 27,893 Total ANGI Homeservices revenue $ 294,822 $ 180,711 $ 550,133 $ 331,456 Video Subscription revenue $ 32,724 $ 26,782 $ 67,067 $ 51,599 Media production and distribution revenue 16,267 23,744 36,315 44,677 Advertising and other revenue 13,766 4,656 25,537 9,483 Total Video revenue $ 62,757 $ 55,182 $ 128,919 $ 105,759 Applications Advertising revenue: Google advertising revenue $ 88,821 $ 94,130 $ 176,252 $ 199,228 Other 6,482 8,678 12,836 14,991 Advertising revenue 95,303 102,808 189,088 214,219 Subscription and other revenue 28,262 15,075 44,551 33,996 Consumer 123,565 117,883 233,639 248,215 Advertising revenue: Google advertising revenue 18,746 25,329 39,892 53,038 Other 741 695 1,472 1,478 Advertising revenue 19,487 26,024 41,364 54,516 Other revenue 22 62 58 135 Partnerships 19,509 26,086 41,422 54,651 Total Applications revenue $ 143,074 $ 143,969 $ 275,061 $ 302,866 Publishing Advertising revenue: Google advertising revenue $ 12,353 $ 10,808 $ 25,991 $ 20,597 Other 26,223 17,234 50,170 33,100 Advertising revenue 38,576 28,042 76,161 53,697 Other revenue 1,183 304 2,406 649 Premium Brands 39,759 28,346 78,567 54,346 Advertising revenue: Google advertising revenue 84,563 43,794 173,255 88,481 Other 9,662 5,786 16,275 12,991 Advertising revenue 94,225 49,580 189,530 101,472 Other revenue 3,371 198 3,580 386 Ask & Other 97,596 49,778 193,110 101,858 Total Publishing revenue $ 137,355 $ 78,124 $ 271,677 $ 156,204
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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Revenue: United States $ 708,571 $ 545,020 $ 1,366,151 $ 1,093,618 All other countries 350,551 222,367 688,046 434,602 Total $ 1,059,122 $ 767,387 $ 2,054,197 $ 1,528,220 June 30, December 31, (In thousands) Long-lived assets (excluding goodwill and intangible assets): United States $ 277,566 $ 286,541 All other countries 29,036 28,629 Total $ 306,602 $ 315,170
Schedule of Reconciliation of Operating Income to Adjusted EBITDA	The following tables reconcile operating income (loss) for the Company's reportable segments and net earnings attributable to IAC shareholders to Adjusted EBITDA: Three Months Ended June 30, 2018 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 150,165 $ 16,706 $ 8,399 $ 237 $ 54 $ 175,561 ANGI Homeservices 23,262 $ 22,053 $ 5,886 $ 15,778 $ — $ 66,979 Video (14,982 ) $ 1,293 $ 447 $ 2,140 $ — $ (11,102 ) Applications 33,077 $ — $ 773 $ 1,554 $ — $ 35,404 Publishing 12,807 $ — $ 469 $ 479 $ — $ 13,755 Other — $ — $ — $ — $ — $ — Corporate (35,892 ) $ 17,509 $ 2,831 $ — $ — $ (15,552 ) Operating income 168,437 Interest expense (27,356 ) Other income, net 171,141 Earnings before income taxes 312,222 Income tax provision (31,368 ) Net earnings 280,854 Net earnings attributable to noncontrolling interests (62,501 ) Net earnings attributable to IAC shareholders $ 218,353 Three Months Ended June 30, 2017 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 82,975 $ 15,654 $ 7,883 $ 404 $ 2,994 $ 109,910 ANGI Homeservices (4,141 ) $ 11,839 $ 3,218 $ 2,750 $ — $ 13,666 Video (7,829 ) $ 133 $ 552 $ 312 $ — $ (6,832 ) Applications 39,134 $ — $ 921 $ 491 $ — $ 40,546 Publishing (2,857 ) $ — $ 930 $ 4,667 $ — $ 2,740 Other — $ — $ — $ — $ — $ — Corporate (31,647 ) $ 11,289 $ 4,835 $ — $ — $ (15,523 ) Operating income 75,635 Interest expense (24,728 ) Other income, net 10,230 Earnings before income taxes 61,137 Income tax benefit 19,420 Net earnings 80,557 Net earnings attributable to noncontrolling interests (14,289 ) Net earnings attributable to IAC shareholders $ 66,268 Six Months Ended June 30, 2018 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 262,398 $ 33,669 $ 16,546 $ 479 $ 210 $ 313,302 ANGI Homeservices 12,506 $ 46,959 $ 12,070 $ 32,084 $ — $ 103,619 Video (30,857 ) $ 1,424 $ 1,122 $ 4,269 $ — $ (24,042 ) Applications 58,538 $ — $ 1,528 $ 2,090 $ — $ 62,156 Publishing 28,618 $ — $ 1,131 $ 1,219 $ — $ 30,968 Other — $ — $ — $ — $ — $ — Corporate (72,816 ) $ 34,591 $ 5,665 $ — $ — $ (32,560 ) Operating income 258,387 Interest expense (53,861 ) Other income, net 166,522 Earnings before income taxes 371,048 Income tax provision (2,355 ) Net earnings 368,693 Net earnings attributable to noncontrolling interests (79,258 ) Net earnings attributable to IAC shareholders $ 289,435 Six Months Ended June 30, 2017 Operating Income (Loss) Stock-Based Compensation Expense Depreciation Amortization of Intangibles Acquisition-related Contingent Consideration Fair Value Adjustments Adjusted EBITDA (In thousands) Match Group $ 141,846 $ 33,678 $ 15,472 $ 807 $ 4,338 $ 196,141 ANGI Homeservices (2,753 ) $ 16,300 $ 6,214 $ 4,117 $ — $ 23,878 Video (23,418 ) $ 133 $ 1,096 $ 625 $ — $ (21,564 ) Applications 71,902 $ — $ 1,932 $ 1,097 $ 548 $ 75,479 Publishing (8,645 ) $ — $ 2,949 $ 9,615 $ — $ 3,919 Other (5,621 ) $ 1,729 $ 836 $ 1,524 $ — $ (1,532 ) Corporate (60,616 ) $ 21,050 $ 9,728 $ — $ — $ (29,838 ) Operating income 112,695 Interest expense (49,520 ) Other income, net 2,516 Earnings before income taxes 65,691 Income tax benefit 43,329 Net earnings 109,020 Net earnings attributable to noncontrolling interests (16,543 ) Net earnings attributable to IAC shareholders $ 92,477

OTHER INCOME, NET (Tables)

OTHER INCOME, NET (Tables)	6 Months Ended
	Jun. 30, 2018
Other Income and Expenses [Abstract]
Schedule of Other Income, Net	Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (In thousands) Other income, net $171,141 $10,230 $166,522 $2,516

GUARANTOR AND NON-GUARANTOR F33

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2018
Guarantor and Nonguarantor Financial Statements [Abstract]
Schedule of Condensed Balance Sheet	Balance sheet at June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Cash and cash equivalents $ 813,872 $ — $ 830,957 $ — $ 1,644,829 Marketable securities 119,746 — 664 — 120,410 Accounts receivable, net of allowance — 118,672 224,904 — 343,576 Other current assets 45,720 26,123 166,114 — 237,957 Intercompany receivables — 1,129,828 — (1,129,828 ) — Property and equipment, net of accumulated depreciation and amortization 4,306 168,685 133,611 — 306,602 Goodwill — 412,010 2,166,286 — 2,578,296 Intangible assets, net of accumulated amortization — 73,933 562,418 — 636,351 Investment in subsidiaries 1,828,822 202,616 — (2,031,438 ) — Other non-current assets 227,459 83,005 222,638 (165,839 ) 367,263 Total assets $ 3,039,925 $ 2,214,872 $ 4,307,592 $ (3,327,105 ) $ 6,235,284 Current portion of long-term debt $ — $ — $ 13,750 $ — $ 13,750 Accounts payable, trade 642 37,027 41,438 — 79,107 Other current liabilities 28,128 89,902 634,793 — 752,823 Long-term debt, net 34,233 — 1,948,038 — 1,982,271 Income taxes payable — 1,434 22,508 — 23,942 Intercompany liabilities 400,448 — 729,380 (1,129,828 ) — Other long-term liabilities 395 18,779 217,389 (165,839 ) 70,724 Redeemable noncontrolling interests — — 75,719 — 75,719 Shareholders' equity (deficit) 2,576,079 2,067,730 (36,292 ) (2,031,438 ) 2,576,079 Noncontrolling interests — — 660,869 — 660,869 Total liabilities and shareholders' equity $ 3,039,925 $ 2,214,872 $ 4,307,592 $ (3,327,105 ) $ 6,235,284 Balance sheet at December 31, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Cash and cash equivalents $ 585,639 $ — $ 1,045,170 $ — $ 1,630,809 Marketable securities 4,995 — — — 4,995 Accounts receivable, net of allowance 31 109,289 194,707 — 304,027 Other current assets 49,159 33,387 102,828 — 185,374 Intercompany receivables — 668,703 — (668,703 ) — Property and equipment, net of accumulated depreciation and amortization 2,811 174,323 138,036 — 315,170 Goodwill — 412,010 2,147,056 — 2,559,066 Intangible assets, net of accumulated amortization — 74,852 588,885 — 663,737 Investment in subsidiaries 2,077,898 554,998 — (2,632,896 ) — Other non-current assets 170,073 87,306 79,688 (132,435 ) 204,632 Total assets $ 2,890,606 $ 2,114,868 $ 4,296,370 $ (3,434,034 ) $ 5,867,810 Current portion of long-term debt $ — $ — $ 13,750 $ — $ 13,750 Accounts payable, trade 5,163 30,469 40,939 — 76,571 Other current liabilities 29,489 88,050 591,868 — 709,407 Long-term debt, net 34,572 — 1,944,897 — 1,979,469 Income taxes payable 16 1,605 24,003 — 25,624 Intercompany liabilities 390,827 — 277,876 (668,703 ) — Other long-term liabilities 511 18,613 186,610 (132,435 ) 73,299 Redeemable noncontrolling interests — — 42,867 — 42,867 Shareholders' equity 2,430,028 1,976,131 656,765 (2,632,896 ) 2,430,028 Noncontrolling interests — — 516,795 — 516,795 Total liabilities and shareholders' equity $ 2,890,606 $ 2,114,868 $ 4,296,370 $ (3,434,034 ) $ 5,867,810
Schedule of Condensed Income Statement	Statement of operations for the three months ended June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 207,964 $ 851,240 $ (82 ) $ 1,059,122 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 75 61,215 156,991 (57 ) 218,224 Selling and marketing expense 189 80,302 289,205 (36 ) 369,660 General and administrative expense 31,652 14,259 142,441 11 188,363 Product development expense 564 14,151 60,730 — 75,445 Depreciation 266 3,126 15,413 — 18,805 Amortization of intangibles — 410 19,778 — 20,188 Total operating costs and expenses 32,746 173,463 684,558 (82 ) 890,685 Operating (loss) income (32,746 ) 34,501 166,682 — 168,437 Equity in earnings of unconsolidated affiliates 233,980 8,630 — (242,610 ) — Interest expense (423 ) — (26,933 ) — (27,356 ) Other income, net (a) 6,436 62,204 153,770 (51,269 ) 171,141 Earnings before income taxes 207,247 105,335 293,519 (293,879 ) 312,222 Income tax benefit (provision) 11,106 (27,557 ) (14,917 ) — (31,368 ) Net earnings 218,353 77,778 278,602 (293,879 ) 280,854 Net earnings attributable to noncontrolling interests — — (62,501 ) — (62,501 ) Net earnings attributable to IAC shareholders 218,353 $ 77,778 $ 216,101 $ (293,879 ) $ 218,353 Comprehensive income attributable to IAC shareholders $ 180,909 $ 77,482 $ 170,613 $ (248,095 ) $ 180,909 (a) During the three months ended June 30, 2018, foreign cash of $50 million was repatriated to the U.S. Statement of operations for the three months ended June 30, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 169,831 $ 597,724 $ (168 ) $ 767,387 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 47 30,131 108,989 (134 ) 139,033 Selling and marketing expense 613 82,268 237,269 (46 ) 320,104 General and administrative expense 35,778 14,785 99,647 12 150,222 Product development expense 936 13,792 40,702 — 55,430 Depreciation 445 5,884 12,010 — 18,339 Amortization of intangibles — 4,667 3,957 — 8,624 Total operating costs and expenses 37,819 151,527 502,574 (168 ) 691,752 Operating (loss) income (37,819 ) 18,304 95,150 — 75,635 Equity in earnings of unconsolidated affiliates 91,382 4,706 — (96,088 ) — Interest expense (5,648 ) — (19,080 ) — (24,728 ) Other (expense) income, net (6,821 ) 6,807 10,244 — 10,230 Earnings before income taxes 41,094 29,817 86,314 (96,088 ) 61,137 Income tax benefit (provision) 25,174 (1,139 ) (4,615 ) — 19,420 Net earnings 66,268 28,678 81,699 (96,088 ) 80,557 Net earnings attributable to noncontrolling interests — — (14,289 ) — (14,289 ) Net earnings attributable to IAC shareholders $ 66,268 $ 28,678 $ 67,410 $ (96,088 ) $ 66,268 Comprehensive income attributable to IAC shareholders $ 76,875 $ 30,852 $ 85,140 $ (115,992 ) $ 76,875 Statement of operations for the six months ended June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 420,853 $ 1,633,500 $ (156 ) $ 2,054,197 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 151 117,439 302,703 (107 ) 420,186 Selling and marketing expense 402 170,440 601,731 (81 ) 772,492 General and administrative expense 63,061 29,640 279,814 32 372,547 Product development expense 1,216 28,420 122,746 — 152,382 Depreciation 532 6,466 31,064 — 38,062 Amortization of intangibles — 919 39,222 — 40,141 Total operating costs and expenses 65,362 353,324 1,377,280 (156 ) 1,795,810 Operating (loss) income (65,362 ) 67,529 256,220 — 258,387 Equity in earnings of unconsolidated affiliates 336,730 8,303 — (345,033 ) — Interest expense (852 ) — (53,009 ) — (53,861 ) Other (expense) income, net (a) (10,411 ) 349,087 155,960 (328,114 ) 166,522 Earnings before income taxes 260,105 424,919 359,171 (673,147 ) 371,048 Income tax benefit (provision) 29,330 (38,523 ) 6,838 — (2,355 ) Net earnings 289,435 386,396 366,009 (673,147 ) 368,693 Net earnings attributable to noncontrolling interests — — (79,258 ) — (79,258 ) Net earnings attributable to IAC shareholders 289,435 $ 386,396 $ 286,751 $ (673,147 ) $ 289,435 Comprehensive income attributable to IAC shareholders $ 280,348 $ 386,443 $ 275,940 $ (662,383 ) $ 280,348 (a) During the six months ended June 30, 2018, foreign cash of $326 million was repatriated to the U.S. Statement of operations for the six months ended June 30, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Revenue $ — $ 351,403 $ 1,177,198 $ (381 ) $ 1,528,220 Operating costs and expenses: Cost of revenue (exclusive of depreciation shown separately below) 160 62,839 222,299 (307 ) 284,991 Selling and marketing expense 939 174,218 495,458 (100 ) 670,515 General and administrative expense 61,914 30,375 201,502 26 293,817 Product development expense 1,506 29,179 79,505 — 110,190 Depreciation 883 13,017 24,327 — 38,227 Amortization of intangibles — 9,752 8,033 — 17,785 Total operating costs and expenses 65,402 319,380 1,031,124 (381 ) 1,415,525 Operating (loss) income (65,402 ) 32,023 146,074 — 112,695 Equity in earnings of unconsolidated affiliates 142,838 2,023 — (144,861 ) — Interest expense (11,476 ) — (38,044 ) — (49,520 ) Other (expense) income, net (12,626 ) 12,898 2,244 — 2,516 Earnings before income taxes 53,334 46,944 110,274 (144,861 ) 65,691 Income tax benefit (provision) 39,143 (10,828 ) 15,014 — 43,329 Net earnings 92,477 36,116 125,288 (144,861 ) 109,020 Net earnings attributable to noncontrolling interests — — (16,543 ) — (16,543 ) Net earnings attributable to IAC shareholders $ 92,477 $ 36,116 $ 108,745 $ (144,861 ) $ 92,477 Comprehensive income attributable to IAC shareholders $ 121,862 $ 42,343 $ 148,908 $ (191,251 ) $ 121,862
Schedule of Condensed Cash Flow Statement	Statement of cash flows for the six months ended June 30, 2018: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries Eliminations IAC Consolidated (In thousands) Net cash (used in) provided by operating activities $ (24,698 ) $ 418,153 $ 314,884 $ (328,537 ) $ 379,802 Cash flows from investing activities: Acquisitions, net of cash acquired (4,142 ) — (13,371 ) — (17,513 ) Capital expenditures (2,200 ) (847 ) (36,649 ) — (39,696 ) Proceeds from maturities and sales of marketable debt securities 10,000 — — — 10,000 Purchases of marketable debt securities (124,397 ) — — — (124,397 ) Purchases of investments (18,180 ) — (13,000 ) — (31,180 ) Net proceeds from the sale of investments and businesses 408 — 27,132 — 27,540 Other, net (5,000 ) 3,884 10,715 — 9,599 Net cash (used in) provided by investing activities (143,511 ) 3,037 (25,173 ) — (165,647 ) Cash flows from financing activities: Repurchases of IAC debt (363 ) — — — (363 ) Principal payments on ANGI Homeservices debt — — (6,875 ) — (6,875 ) Purchase of IAC treasury stock (7,869 ) — — — (7,869 ) Purchase of Match Group treasury stock — — (73,943 ) — (73,943 ) Proceeds from the exercise of IAC stock options 27,317 — — — 27,317 Proceeds from the exercise of Match Group and ANGI Homeservices stock options — — 2,125 — 2,125 Withholding taxes paid on behalf of IAC employees on net settled stock-based awards (495 ) — — — (495 ) Withholding taxes paid on behalf of Match Group and ANGI Homeservices employees on net settled stock-based awards — — (136,727 ) — (136,727 ) Purchase of noncontrolling interests — — (877 ) — (877 ) Acquisition-related contingent consideration payments — — (185 ) — (185 ) Intercompany 375,167 (421,190 ) (282,514 ) 328,537 — Other, net 2,674 — (7,487 ) — (4,813 ) Net cash provided by (used in) financing activities 396,431 (421,190 ) (506,483 ) 328,537 (202,705 ) Total cash provided (used) 228,222 — (216,772 ) — 11,450 Effect of exchange rate changes on cash, cash equivalents, and restricted cash 11 — 33 — 44 Net increase (decrease) in cash, cash equivalents, and restricted cash 228,233 — (216,739 ) — 11,494 Cash, cash equivalents, and restricted cash at beginning of period 585,639 — 1,048,043 — 1,633,682 Cash, cash equivalents, and restricted cash at end of period $ 813,872 $ — $ 831,304 $ — $ 1,645,176 Statement of cash flows for the six months ended June 30, 2017: IAC Guarantor Subsidiaries Non-Guarantor Subsidiaries IAC Consolidated (In thousands) Net cash (used in) provided by operating activities $ (40,671 ) $ 40,314 $ 158,071 $ 157,714 Cash flows from investing activities: Acquisitions, net of cash acquired — (2,200 ) (46,964 ) (49,164 ) Capital expenditures (216 ) (657 ) (40,948 ) (41,821 ) Proceeds from maturities and sales of marketable debt securities 99,350 — — 99,350 Purchases of marketable debt securities (24,909 ) — — (24,909 ) Purchases of investments — — (5,105 ) (5,105 ) Net proceeds from the sale of businesses and investments — — 119,697 119,697 Other, net — 120 956 1,076 Net cash provided by (used in) investing activities 74,225 (2,737 ) 27,636 99,124 Cash flows from financing activities: Repurchases of IAC debt (31,590 ) — — (31,590 ) Purchase of IAC treasury stock (56,424 ) — — (56,424 ) Proceeds from the exercise of IAC stock options 48,146 — — 48,146 Proceeds from the exercise of Match Group stock options — — 39,403 39,403 Withholding taxes paid on behalf of IAC employees on net settled stock-based awards (49,900 ) — — (49,900 ) Withholding taxes paid on behalf of Match Group employees on net settled stock-based awards — — (28,421 ) (28,421 ) Purchase of noncontrolling interests — — (12,361 ) (12,361 ) Acquisition-related contingent consideration payments — — (3,860 ) (3,860 ) Intercompany 54,316 (37,577 ) (16,739 ) — Other, net 251 — (5,124 ) (4,873 ) Net cash used in financing activities (35,201 ) (37,577 ) (27,102 ) (99,880 ) Total cash (used) provided (1,647 ) — 158,605 156,958 Effect of exchange rate changes on cash, cash equivalents, and restricted cash 36 — 5,438 5,474 Net (decrease) increase in cash, cash equivalents, and restricted cash (1,611 ) — 164,043 162,432 Cash, cash equivalents, and restricted cash at beginning of period 573,784 — 786,415 1,360,199 Cash, cash equivalents, and restricted cash at end of period $ 572,173 $ — $ 950,458 $ 1,522,631

THE COMPANY AND SUMMARY OF SI34

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Revenue and Other [Line Items]
Retained earnings	$ 921,268		$ 921,268			$ 595,038
Revenue	1,059,122	$ 767,387	2,054,197	$ 1,528,220
Accounts receivable, net of allowance	343,576		343,576			304,027
Operating segments | Publishing
Revenue and Other [Line Items]
Revenue	137,355	78,124	271,677	156,204
Operating segments | Applications
Revenue and Other [Line Items]
Revenue	143,074	143,969	275,061	302,866
Operating segments | Match Group
Revenue and Other [Line Items]
Revenue	421,196	309,572	828,563	608,336
Google Inc.
Revenue and Other [Line Items]
Accounts receivable, net of allowance	73,400		73,400			72,400
Google Inc. | Publishing and Applications
Revenue and Other [Line Items]
Revenue	$ 204,900	$ 174,600	$ 416,200	$ 362,400
Google Inc. | Revenue | Customer concentration risk
Revenue and Other [Line Items]
Concentration risk (as a percent)	19.00%	23.00%	20.00%	24.00%
Google Inc. | Revenue | Customer concentration risk | Operating segments | Publishing
Revenue and Other [Line Items]
Concentration risk (as a percent)	71.00%	70.00%	73.00%	70.00%
Google Inc. | Revenue | Customer concentration risk | Operating segments | Applications
Revenue and Other [Line Items]
Concentration risk (as a percent)	75.00%	83.00%	79.00%	83.00%
Match Group, Inc.
Revenue and Other [Line Items]
Economic interest (as a percent)	81.20%		81.20%
Voting interest (as a percent)	97.60%		97.60%
ANGI Homeservices
Revenue and Other [Line Items]
Economic interest (as a percent)	86.40%		86.40%
Voting interest (as a percent)	98.50%		98.50%
Accounting Standards Update 2014-09
Revenue and Other [Line Items]
Retained earnings					$ 40,200	$ 3,400
Accounting Standards Update 2014-09 | Applications
Revenue and Other [Line Items]
Retained earnings					$ 15,500

THE COMPANY AND SUMMARY OF SI35

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 921,268		$ 921,268			$ 595,038
Deferred tax liability	35,550		35,550			35,070
Deferred revenue	375,138		375,138			342,483
Unrealized gains, net, on equity securities held	126,414	$ 8,000	126,559	$ 10,600
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings					$ 40,200	$ 3,400
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized gains, net, on equity securities held	$ 126,400		$ 126,600
ANGI Homeservices | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings					25,900
Current capitalized contract costs					29,700
Noncurrent capitalized contract costs					4,200
Deferred tax liability					8,000
Applications | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings					15,500
Deferred tax liability					4,900
Deferred revenue					$ 20,300

THE COMPANY AND SUMMARY OF SI36

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Adoption of ASU 2014-09 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 1,059,122	$ 767,387	$ 2,054,197	$ 1,528,220
Operating costs and expenses	890,685	691,752	1,795,810	1,415,525
Operating income (loss)	168,437	75,635	258,387	112,695
Net earnings	280,854	80,557	368,693	109,020
Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	1,061,151		2,056,185
Operating costs and expenses	892,097		1,803,023
Operating income (loss)	169,054		253,162
Net earnings	281,269		364,786
Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	(2,029)		(1,988)
Operating costs and expenses	(1,412)		(7,213)
Operating income (loss)	(617)		5,225
Net earnings	(415)		3,907
Operating segments | Match Group
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	421,196	309,572	828,563	608,336
Operating costs and expenses	271,031		566,165
Operating income (loss)	150,165	82,975	262,398	141,846
Operating segments | Match Group | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	421,196		828,563
Operating costs and expenses	271,031		566,165
Operating income (loss)	150,165		262,398
Operating segments | Match Group | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	0		0
Operating costs and expenses	0		0
Operating income (loss)	0		0
Operating segments | ANGI Homeservices
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	294,822	180,711	550,133	331,456
Operating costs and expenses	271,560		537,627
Operating income (loss)	23,262	(4,141)	12,506	(2,753)
Operating segments | ANGI Homeservices | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	294,822		550,133
Operating costs and expenses	273,678		545,838
Operating income (loss)	21,144		4,295
Operating segments | ANGI Homeservices | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	0		0
Operating costs and expenses	(2,118)		(8,211)
Operating income (loss)	2,118		8,211
Operating segments | Video
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	62,757	55,182	128,919	105,759
Operating costs and expenses	77,739		159,776
Operating income (loss)	(14,982)	(7,829)	(30,857)	(23,418)
Operating segments | Video | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	63,018		129,609
Operating costs and expenses	77,739		160,003
Operating income (loss)	(14,721)		(30,394)
Operating segments | Video | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	(261)		(690)
Operating costs and expenses	0		(227)
Operating income (loss)	(261)		(463)
Operating segments | Applications
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	143,074	143,969	275,061	302,866
Operating costs and expenses	109,997		216,523
Operating income (loss)	33,077	39,134	58,538	71,902
Operating segments | Applications | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	144,842		276,359
Operating costs and expenses	109,291		215,298
Operating income (loss)	35,551		61,061
Operating segments | Applications | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	(1,768)		(1,298)
Operating costs and expenses	706		1,225
Operating income (loss)	(2,474)		(2,523)
Operating segments | Publishing
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	137,355	78,124	271,677	156,204
Operating costs and expenses	124,548		243,059
Operating income (loss)	12,807	(2,857)	28,618	(8,645)
Operating segments | Publishing | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	137,355		271,677
Operating costs and expenses	124,548		243,059
Operating income (loss)	12,807		28,618
Operating segments | Publishing | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	0		0
Operating costs and expenses	0		0
Operating income (loss)	0		0
Operating segments | Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue				23,980
Operating income (loss)	0	0	0	(5,621)
Inter-segment eliminations
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	(82)	(171)	(156)	(381)
Inter-segment eliminations | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	(82)		(156)
Inter-segment eliminations | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	0		0
Corporate
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Operating costs and expenses	35,810		72,660
Operating income (loss)	(35,892)	$ (31,647)	(72,816)	$ (60,616)
Corporate | Under ASC 605
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Operating costs and expenses	35,810		72,660
Operating income (loss)	(35,892)		(72,816)
Corporate | Accounting Standards Update 2014-09 | Effect of adoption of ASU No. 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Operating costs and expenses	0		0
Operating income (loss)	$ 0		$ 0

THE COMPANY AND SUMMARY OF SI37

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 1,644,829	$ 1,630,809	$ 1,522,300	$ 1,329,187
Restricted cash included in other current assets	347	2,873	331	20,464
Restricted cash included in other assets	0	0	0	10,548
Total cash, cash equivalents and restricted cash as shown on the consolidated statement of cash flows	$ 1,645,176	$ 1,633,682	$ 1,522,631	$ 1,360,199

REVENUE RECOGNITION - Narrative

REVENUE RECOGNITION - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Deferred revenue			$ 332,200
Deferred revenue recognized during period	$ 224,000	$ 278,800
Deferred revenue	375,138	375,138		$ 342,483
Noncurrent deferred revenue	2,000	2,000
Amortization expense recognized related to contract cost assets	84,700	159,800
Capitalization of costs incurred to obtain contract	$ 72,800	$ 72,800

INCOME TAXES - Narrative (Detai

INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ 31,368	$ (19,420)	$ 2,355	$ (43,329)
Effective income tax rate (as a percent)	10.00%		1.00%
Total unrecognized tax benefits including interest and penalties	$ 40,500		$ 40,500		$ 39,700
Unrecognized tax benefit, if subsequently recognized would reduce income tax expense	37,600		37,600		$ 37,200
Decrease in unrecognized tax benefit, reasonably possible within twelve months	12,700		12,700
Decrease in unrecognized tax benefit, reasonably possible within twelve months which would reduce the income tax provision	12,400		12,400
Decrease in unrecognized tax benefit which would reduce the income tax provision	$ 125,000		$ 125,000

BUSINESS COMBINATION - Narrativ

BUSINESS COMBINATION - Narrative (Details) - USD ($) $ in Millions	Sep. 29, 2017	Jun. 30, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Pro-forma adjustment to increase share-based compensation		$ 11.6	$ 26.3
Pro-forma adjustment to increase amortization of intangibles		$ 11.5	$ 23.1
Angie's List
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%
Purchase price	$ 781.4

BUSINESS COMBINATION - Pro Form

BUSINESS COMBINATION - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Business Combinations [Abstract]
Revenue	$ 839,729	$ 1,673,023
Net earnings attributable to IAC shareholders	$ 53,996	$ 67,335
Basic earnings per share attributable to IAC shareholders (USD per share)	$ 0.68	$ 0.86
Diluted earnings per share attributable to IAC shareholders (USD per share)	$ 0.55	$ 0.69

MARKETABLE SECURITIES - Narrati

MARKETABLE SECURITIES - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Marketable Securities [Abstract]
Contractual maturity of current available-for-sale securities			1 year
Available-for-sale securities in an unrealized loss position	$ 0		$ 0
Unrealized gains, net, on equity securities held	126,414,000	$ 8,000,000	126,559,000	$ 10,600,000
Gross realized gains	$ 0	$ 0
Gross realized losses			$ 0	$ 0

MARKETABLE SECURITIES - Fair Va

MARKETABLE SECURITIES - Fair Value of Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Marketable Securities [Abstract]
Available-for-sale marketable debt securities	$ 119,746	$ 4,995
Marketable equity security	664	0
Total marketable securities	$ 120,410	$ 4,995

MARKETABLE SECURITIES - Schedul

MARKETABLE SECURITIES - Schedule of Current Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Marketable Securities
Amortized Cost	$ 119,740	$ 4,995
Gross Unrealized Gains	6	0
Gross Unrealized Losses	0	0
Available-for-sale marketable debt securities	119,746	4,995
Treasury discount notes
Schedule of Available-for-sale Marketable Securities
Amortized Cost	99,795
Gross Unrealized Gains	6
Gross Unrealized Losses	0
Available-for-sale marketable debt securities	99,801
Commercial paper
Schedule of Available-for-sale Marketable Securities
Amortized Cost	19,945	4,995
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Available-for-sale marketable debt securities	$ 19,945	$ 4,995

MARKETABLE SECURITIES - Sched45

MARKETABLE SECURITIES - Schedule of Proceeds from Maturities and Sales of Current Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Marketable Securities [Abstract]
Proceeds from maturities and sales of available-for-sale marketable debt securities	$ 5,000	$ 24,000	$ 10,000	$ 99,350

FAIR VALUE MEASUREMENTS AND F46

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Narrative (Details) $ in Millions	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Contingent Consideration Arrangements
Contingent consideration, maximum amount at balance sheet date	$ 32
Contingent consideration, fair value at balance sheet date with a maximum limit	2
Contingent consideration, at fair value, current	1.9	$ 0.6
Contingent consideration, at fair value, noncurrent		2
Assets measured at fair value on a nonrecurring basis
Equity securities without readily determinable fair values	$ 216.2	$ 63.4
Measurement Input, Discount Rate | Contingent Consideration Arrangements
Contingent Consideration Arrangements
Contingent consideration, discount rates (as a percent)	0.12	0.12

FAIR VALUE MEASUREMENTS AND F47

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets:
Marketable securities	$ 119,746	$ 4,995
Marketable equity security	664	0
Total	1,282,446	1,167,397
Liabilities:
Contingent consideration arrangements	(1,910)	(2,647)
Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Total	889,851	880,882
Liabilities:
Contingent consideration arrangements	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Total	392,595	286,515
Liabilities:
Contingent consideration arrangements	0	0
Significant Unobservable Inputs (Level 3)
Assets:
Total	0	0
Liabilities:
Contingent consideration arrangements	(1,910)	(2,647)
Money market funds
Assets:
Cash equivalents	726,865	780,425
Money market funds | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	726,865	780,425
Money market funds | Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	0	0
Money market funds | Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Commercial paper
Assets:
Cash equivalents	191,852	215,325
Marketable securities	19,945	4,995
Commercial paper | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	0	0
Marketable securities	0	0
Commercial paper | Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	191,852	215,325
Marketable securities	19,945	4,995
Commercial paper | Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Marketable securities	0	0
Treasury discount notes
Assets:
Cash equivalents	162,322	100,457
Marketable securities	99,801
Treasury discount notes | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	162,322	100,457
Marketable securities	0
Treasury discount notes | Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	0	0
Marketable securities	99,801
Treasury discount notes | Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Marketable securities	0
Time deposits
Assets:
Cash equivalents	80,037	60,000
Time deposits | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	0	0
Time deposits | Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	80,037	60,000
Time deposits | Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Certificates of deposit
Assets:
Cash equivalents	960	6,195
Certificates of deposit | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash equivalents	0	0
Certificates of deposit | Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	960	6,195
Certificates of deposit | Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	$ 0
Marketable equity security
Assets:
Marketable equity security	664
Marketable equity security | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Assets:
Marketable equity security	664
Marketable equity security | Significant Other Observable Inputs (Level 2)
Assets:
Marketable equity security	0
Marketable equity security | Significant Unobservable Inputs (Level 3)
Assets:
Marketable equity security	$ 0

FAIR VALUE MEASUREMENTS AND F48

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Contingent Consideration Arrangements - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Contingent Consideration Arrangements
Balance at beginning of period	$ (1,965)	$ (21,821)	$ (2,647)	$ (33,871)
Fair value adjustments	(54)	(2,994)	(210)	(4,885)
Included in other comprehensive income (loss)	109	(14)	(1)	(1,073)
Settlements			948	15,000
Balance at end of period	$ (1,910)	$ (24,829)	$ (1,910)	$ (24,829)

FAIR VALUE MEASUREMENTS AND F49

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Realized and Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Upward adjustments (gross unrealized gains)	$ 128,786		$ 128,786
Downward adjustments (including impairment) (gross unrealized losses)	(2,396)		(2,588)
Total	126,390		126,198
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Realized gains, net, for equity securities sold	27,275		27,172
Unrealized gains, net, on equity securities held	126,414	$ 8,000	126,559	$ 10,600
Total gains recognized, net, in other income, net	$ 153,689		$ 153,731

FAIR VALUE MEASUREMENTS AND F50

FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	$ (13,750)	$ (13,750)
Long-term debt, net of current portion	(1,982,271)	(1,979,469)
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	(13,750)	(13,750)
Long-term debt, net of current portion	(1,982,271)	(1,979,469)
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current portion of long-term debt	(13,613)	(13,802)
Long-term debt, net of current portion	$ (2,156,890)	$ (2,168,108)

LONG-TERM DEBT - Narrative (Det

LONG-TERM DEBT - Narrative (Details)	Oct. 02, 2017USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)	Dec. 04, 2017USD ($)	Jun. 01, 2016USD ($)
Debt Instrument [Line Items]
Exchange price per share (USD per share) | $ / shares		$ 152.18
IAC Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 300,000,000	$ 300,000,000
Borrowings outstanding of credit facility		0	$ 0	$ 0
Annual commitment fee on undrawn funds, basis points			0.25%
IAC Credit Facility | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum leverage ratio			3.25
Match Group, Inc.
Debt Instrument [Line Items]
Outstanding balance of debt instrument		1,275,000,000	$ 1,275,000,000	1,275,000,000
Net unamortized discount (premium)		8,010,000	8,010,000	8,668,000
Match Group, Inc. | Match Group Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		500,000,000	500,000,000
Borrowings outstanding of credit facility		0	$ 0	$ 0
Annual commitment fee on undrawn funds, basis points			0.30%
Match Group, Inc. | Match Group Credit Agreement | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum leverage ratio			5
Match Group, Inc. | Match Group Credit Agreement | Minimum | Revolving Credit Facility
Debt Instrument [Line Items]
Minimum interest coverage ratio			2.5
Senior Notes | IAC
Debt Instrument [Line Items]
Outstanding balance of debt instrument	$ 517,500,000	$ 456,800,000	$ 456,800,000
Exchangeable stock (shares) | shares	6.5713
Exchange price per share (USD per share) | $ / shares	$ 152.18		$ 152.18
Period of reported sale price of common stock (trading days)	20 days
Period of consecutive reported sale price of common stock (trading days)	30 days
Exchange price on applicable trading day (as a percent)	130.00%
Amount of product relative to last reported price (as a percent)	98.00%
Proceeds from issuance of debt	$ 499,500,000
Repayment of net premium on exchangeable note hedge and warrants	50,700,000
Amount of debt discount and increase to additional paid in capital	$ 70,400,000
Outstanding stock (shares) | shares		3,400,000	3,400,000
Outstanding warrants (shares) | shares		3,400,000	3,400,000
Exercise price of warrants (USD per share) | $ / shares		$ 229.70	$ 229.70
Interest Expense, Debt		$ 5,300,000	$ 10,500,000
Amortization of Debt Discount (Premium)		3,300,000	6,500,000
Amortization of debt issuance costs		800,000	1,700,000
Net unamortized discount (premium)		$ 60,700,000	$ 60,700,000
Senior Notes | 6.375% Senior Notes due June 1, 2024 (the Match Group 6.375% Senior Notes) | Maximum
Debt Instrument [Line Items]
Maximum leverage ratio			5
Senior Notes | Senior Notes, 0.875% due October 1, 2022 | IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)	0.875%
Senior Notes | Senior Notes, 0.875% due October 1, 2022 | Maximum | IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)		3.88%	3.88%
Senior Notes | Senior Notes, 0.875% due October 1, 2022 | Minimum | IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)		0.875%	0.875%
Senior Notes | Senior Notes, 4.75% Due December 15, 2022 | IAC
Debt Instrument [Line Items]
Stated interest rate (as a percent)		4.75%	4.75%
Senior Notes | Match Group, Inc. | 6.375% Senior Notes due June 1, 2024 (the Match Group 6.375% Senior Notes)
Debt Instrument [Line Items]
Stated interest rate (as a percent)		6.375%	6.375%	6.375%		6.375%
Face amount of debt instrument						$ 400,000,000
Outstanding balance of debt instrument		$ 400,000,000	$ 400,000,000	$ 400,000,000
Senior Notes | Match Group, Inc. | Match Group Senior Notes, 5.00% December 15, 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)		5.00%	5.00%		5.00%
Outstanding balance of debt instrument		$ 450,000,000	$ 450,000,000	450,000,000	$ 450,000,000
Senior Notes | Match Group, Inc. | 6.75% Senior Notes due December 15, 2022 (the Match Group 6.75% Senior Notes)
Debt Instrument [Line Items]
Stated interest rate (as a percent)					6.75%
Outstanding balance of debt instrument					$ 445,200,000
Term Loan | Match Group, Inc. | Term Loan due November 16, 2022
Debt Instrument [Line Items]
Outstanding balance of debt instrument		425,000,000	$ 425,000,000	$ 425,000,000
Term Loan | Match Group, Inc. | Match Group Term Loan due November 16, 2022
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)			4.59%	3.85%
Term Loan | Match Group, Inc. | Match Group Term Loan due November 16, 2022 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)			2.50%
Term Loan | ANGI Homeservices
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)			4.36%	3.38%
Term Loan | ANGI Homeservices | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)			2.00%
Term Loan | ANGI Homeservices | Term Loan due November 01, 2022
Debt Instrument [Line Items]
Outstanding balance of debt instrument		$ 268,125,000	$ 268,125,000	$ 275,000,000
Term Loan | ANGI Homeservices | Term Loan due November 01, 2022 | Maximum
Debt Instrument [Line Items]
Maximum leverage ratio			4.5
Term Loan | ANGI Homeservices | Term Loan due November 01, 2022 | Minimum
Debt Instrument [Line Items]
Minimum interest coverage ratio			2.5
Term Loan | ANGI Homeservices | Quarterly Payments for First Three Years
Debt Instrument [Line Items]
Stated interest rate (as a percent)		1.25%	1.25%
Term Loan | ANGI Homeservices | Quarterly Payments in Fourth Year
Debt Instrument [Line Items]
Stated interest rate (as a percent)		2.50%	2.50%
Term Loan | ANGI Homeservices | Quarterly Payments in Fifth Year
Debt Instrument [Line Items]
Stated interest rate (as a percent)		3.75%	3.75%

LONG-TERM DEBT - Schedule of Lo

LONG-TERM DEBT - Schedule of Long-Term Debt (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Dec. 04, 2017	Jun. 01, 2016
Debt Instrument [Line Items]
Less: current portion of long-term debt	$ 13,750,000	$ 13,750,000
Long-term debt, net	1,982,271,000	1,979,469,000
Match Group, Inc.
Debt Instrument [Line Items]
Long-term debt	1,275,000,000	1,275,000,000
Less: unamortized original issue discount	8,010,000	8,668,000
Less: unamortized debt issuance costs	12,725,000	13,636,000
Long-term debt, net	1,254,265,000	1,252,696,000
Match Group, Inc. | Term Loan | Term Loan due November 16, 2022
Debt Instrument [Line Items]
Long-term debt	425,000,000	425,000,000
Match Group, Inc. | Senior Notes | 6.375% Senior Notes due June 1, 2024 (the Match Group 6.375% Senior Notes)
Debt Instrument [Line Items]
Long-term debt	$ 400,000,000	$ 400,000,000
Stated interest rate (as a percent)	6.375%	6.375%		6.375%
Match Group, Inc. | Senior Notes | Match Group Senior Notes, 5.00% December 15, 2027
Debt Instrument [Line Items]
Long-term debt	$ 450,000,000	$ 450,000,000	$ 450,000,000
Stated interest rate (as a percent)	5.00%		5.00%
ANGI Homeservices
Debt Instrument [Line Items]
Less: current portion of long-term debt	$ 13,750,000	13,750,000
Less: unamortized debt issuance costs	2,635,000	2,938,000
Long-term debt, net	251,740,000	258,312,000
ANGI Homeservices | Term Loan | Term Loan due November 01, 2022
Debt Instrument [Line Items]
Long-term debt	268,125,000	275,000,000
IAC/InterActiveCorp
Debt Instrument [Line Items]
Long-term debt	551,989,000	552,359,000
Less: unamortized original issue discount	60,654,000	67,158,000
Less: unamortized debt issuance costs	15,069,000	16,740,000
Long-term debt, net	476,266,000	468,461,000
IAC/InterActiveCorp | Senior Notes | Senior Notes, 0.875% due October 1, 2022
Debt Instrument [Line Items]
Long-term debt	$ 517,500,000	517,500,000
Stated interest rate (as a percent)	0.875%
IAC/InterActiveCorp | Senior Notes | Senior Notes, 4.75% Due December 15, 2022
Debt Instrument [Line Items]
Long-term debt	$ 34,489,000	$ 34,859,000
Stated interest rate (as a percent)	4.75%

ACCUMULATED OTHER COMPREHENSI53

ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			$ 2,430,028
Other comprehensive income before reclassifications	$ (37,576)	$ 14,669	(9,097)	$ 32,733
Amounts reclassified to earnings	(191)	(4,062)	(52)	(3,348)
Net current period other comprehensive income (loss)	(37,767)	10,607	(9,149)	29,385
Balance at end of period	2,576,079		2,576,079
Tax provision (benefit) on accumulated other comprehensive income		(3,800)		(3,800)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(74,950)	(147,345)	(103,568)	(166,123)
Balance at end of period	(112,717)	(136,738)	(112,717)	(136,738)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(74,950)	(151,373)	(103,568)	(170,149)
Other comprehensive income before reclassifications	(37,589)	14,664	(9,110)	32,726
Amounts reclassified to earnings	(191)	(29)	(52)	685
Net current period other comprehensive income (loss)	(37,780)	14,635	(9,162)	33,411
Balance at end of period	(112,730)	(136,738)	(112,730)	(136,738)
Unrealized Gains On Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	0	4,028	0	4,026
Other comprehensive income before reclassifications	13	5	13	7
Amounts reclassified to earnings	0	(4,033)	0	(4,033)
Net current period other comprehensive income (loss)	13	(4,028)	13	(4,026)
Balance at end of period	$ 13	$ 0	$ 13	$ 0

EARNINGS PER SHARE - Summary (D

EARNINGS PER SHARE - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator: Basic
Net earnings	$ 280,854	$ 80,557	$ 368,693	$ 109,020
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Net earnings (loss) attributable to IAC shareholders	218,353	66,268	289,435	92,477
Numerator: Diluted
Net earnings	280,854	80,557	368,693	109,020
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Impact from public subsidiaries' dilutive securities	(6,994)	(7,925)	(12,569)	(10,355)
Net earnings (loss) attributable to IAC shareholders	$ 211,359	$ 58,343	$ 276,866	$ 82,122
Denominator: Basic
Weighted average basic shares outstanding (shares)	83,604	79,067	83,296	78,633
Denominator: Diluted
Weighted average basic shares outstanding (shares)	83,604	79,067	83,296	78,633
Dilutive securities including stock options and RSUs and subsidiary denominated equity awards (shares)	7,330	4,711	7,438	4,510
Denominator for earnings per share - weighted average shares (shares)	90,934	83,778	90,734	83,143
Earnings (loss) per share attributable to IAC shareholders: Basic
Basic earnings per share (USD per share)	$ 2.61	$ 0.84	$ 3.47	$ 1.18
Earnings (loss) per share attributable to IAC shareholders: Diluted
Diluted earnings per share (USD per share)	2.32	$ 0.70	$ 3.05	$ 0.99
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exchange price per share (USD per share)	$ 152.18
Subsidiary Denominated Equity, Stock Options, and RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (shares)	3,400	100	6,900	500
Market-based awards and PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (less than or equal to) (shares)	200	400	200	400

SEGMENT INFORMATION - Financial

SEGMENT INFORMATION - Financial Data by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 1,059,122	$ 767,387	$ 2,054,197	$ 1,528,220
Operating income (loss)	168,437	75,635	258,387	112,695
Operating segments | Match Group
Segment Reporting Information [Line Items]
Revenue	421,196	309,572	828,563	608,336
Operating income (loss)	150,165	82,975	262,398	141,846
Adjusted EBITDA	175,561	109,910	313,302	196,141
Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	294,822	180,711	550,133	331,456
Operating income (loss)	23,262	(4,141)	12,506	(2,753)
Adjusted EBITDA	66,979	13,666	103,619	23,878
Operating segments | Video
Segment Reporting Information [Line Items]
Revenue	62,757	55,182	128,919	105,759
Operating income (loss)	(14,982)	(7,829)	(30,857)	(23,418)
Adjusted EBITDA	(11,102)	(6,832)	(24,042)	(21,564)
Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	143,074	143,969	275,061	302,866
Operating income (loss)	33,077	39,134	58,538	71,902
Adjusted EBITDA	35,404	40,546	62,156	75,479
Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	137,355	78,124	271,677	156,204
Operating income (loss)	12,807	(2,857)	28,618	(8,645)
Adjusted EBITDA	13,755	2,740	30,968	3,919
Operating segments | Other
Segment Reporting Information [Line Items]
Revenue				23,980
Operating income (loss)	0	0	0	(5,621)
Adjusted EBITDA	0	0	0	(1,532)
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenue	(82)	(171)	(156)	(381)
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)	(35,892)	(31,647)	(72,816)	(60,616)
Adjusted EBITDA	$ (15,552)	$ (15,523)	$ (32,560)	$ (29,838)

SEGMENT INFORMATION - Schedule

SEGMENT INFORMATION - Schedule of Revenue Disaggregated by Service (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 1,059,122	$ 767,387	$ 2,054,197	$ 1,528,220
Operating segments | Match Group
Segment Reporting Information [Line Items]
Revenue	421,196	309,572	828,563	608,336
Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	294,822	180,711	550,133	331,456
Operating segments | Video
Segment Reporting Information [Line Items]
Revenue	62,757	55,182	128,919	105,759
Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	143,074	143,969	275,061	302,866
Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	137,355	78,124	271,677	156,204
North America | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	277,505	165,491	513,531	303,563
International
Segment Reporting Information [Line Items]
Revenue	350,551	222,367	688,046	434,602
Europe | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	17,317	15,220	36,602	27,893
Direct revenue | Operating segments | Match Group
Segment Reporting Information [Line Items]
Revenue	407,727	299,423	800,464	587,175
Direct revenue | North America | Operating segments | Match Group
Segment Reporting Information [Line Items]
Revenue	222,163	178,505	433,520	353,833
Direct revenue | International | Operating segments | Match Group
Segment Reporting Information [Line Items]
Revenue	185,564	120,918	366,944	233,342
Indirect revenue | Operating segments | Match Group
Segment Reporting Information [Line Items]
Revenue	13,469	10,149	28,099	21,161
Marketplace revenue | North America | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	204,735	155,755	370,343	285,399
Consumer connection revenue | North America | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	187,172	141,163	336,232	257,163
Membership subscription revenue | North America | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	16,565	13,704	32,192	26,456
Other revenue | North America | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	998	888	1,919	1,780
Other revenue | Operating segments | Video
Segment Reporting Information [Line Items]
Revenue	13,766	4,656	25,537	9,483
Other revenue | North America | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	72,770	9,736	143,188	18,164
Other revenue | Europe | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	304	178	551	380
Consumer connection revenue | Europe | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	12,496	11,170	26,863	19,635
Membership subscription revenue | Europe | Operating segments | ANGI Homeservices
Segment Reporting Information [Line Items]
Revenue	4,517	3,872	9,188	7,878
Subscription revenue | Operating segments | Video
Segment Reporting Information [Line Items]
Revenue	32,724	26,782	67,067	51,599
Media production and distribution revenue | Operating segments | Video
Segment Reporting Information [Line Items]
Revenue	16,267	23,744	36,315	44,677
Consumer | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	123,565	117,883	233,639	248,215
Advertising revenue | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	95,303	102,808	189,088	214,219
Google advertising revenue | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	88,821	94,130	176,252	199,228
Other | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	6,482	8,678	12,836	14,991
Subscription and other revenue | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	28,262	15,075	44,551	33,996
Partnerships | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	19,509	26,086	41,422	54,651
Advertising revenue | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	19,487	26,024	41,364	54,516
Google advertising revenue | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	18,746	25,329	39,892	53,038
Other | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	741	695	1,472	1,478
Other revenue | Operating segments | Applications
Segment Reporting Information [Line Items]
Revenue	22	62	58	135
Premium Brands | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	39,759	28,346	78,567	54,346
Advertising revenue | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	38,576	28,042	76,161	53,697
Google advertising revenue | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	12,353	10,808	25,991	20,597
Other | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	26,223	17,234	50,170	33,100
Other revenue | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	1,183	304	2,406	649
Ask & Other | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	97,596	49,778	193,110	101,858
Advertising revenue | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	94,225	49,580	189,530	101,472
Google advertising revenue | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	84,563	43,794	173,255	88,481
Other | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	9,662	5,786	16,275	12,991
Other revenue | Operating segments | Publishing
Segment Reporting Information [Line Items]
Revenue	$ 3,371	$ 198	$ 3,580	$ 386

SEGMENT INFORMATION - Schedul57

SEGMENT INFORMATION - Schedule of Geographic Information About Revenue and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue and long-lived assets by geography
Revenue	$ 1,059,122	$ 767,387	$ 2,054,197	$ 1,528,220
Property and equipment, net of accumulated depreciation and amortization	306,602		306,602		$ 315,170
United States
Revenue and long-lived assets by geography
Revenue	708,571	545,020	1,366,151	1,093,618
Property and equipment, net of accumulated depreciation and amortization	277,566		277,566		286,541
All other countries
Revenue and long-lived assets by geography
Revenue	350,551	$ 222,367	688,046	$ 434,602
Property and equipment, net of accumulated depreciation and amortization	$ 29,036		$ 29,036		$ 28,629

SEGMENT INFORMATION - Schedul58

SEGMENT INFORMATION - Schedule of Reconciliation of Operating Income (Loss) to Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	$ 168,437	$ 75,635	$ 258,387	$ 112,695
Stock-based compensation expense	57,561	38,915	116,643	72,890
Depreciation	18,805	18,339	38,062	38,227
Amortization of intangibles	20,188	8,624	40,141	17,785
Interest expense	(27,356)	(24,728)	(53,861)	(49,520)
Other income, net	171,141	10,230	166,522	2,516
Earnings before income taxes	312,222	61,137	371,048	65,691
Income tax benefit (provision)	(31,368)	19,420	(2,355)	43,329
Net earnings	280,854	80,557	368,693	109,020
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Net earnings attributable to IAC shareholders	218,353	66,268	289,435	92,477
Operating segments | Match Group
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	150,165	82,975	262,398	141,846
Stock-based compensation expense	16,706	15,654	33,669	33,678
Depreciation	8,399	7,883	16,546	15,472
Amortization of intangibles	237	404	479	807
Acquisition-related Contingent Consideration Fair Value Adjustments	54	2,994	210	4,338
Adjusted EBITDA	175,561	109,910	313,302	196,141
Operating segments | ANGI Homeservices
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	23,262	(4,141)	12,506	(2,753)
Stock-based compensation expense	22,053	11,839	46,959	16,300
Depreciation	5,886	3,218	12,070	6,214
Amortization of intangibles	15,778	2,750	32,084	4,117
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0	0	0
Adjusted EBITDA	66,979	13,666	103,619	23,878
Operating segments | Video
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	(14,982)	(7,829)	(30,857)	(23,418)
Stock-based compensation expense	1,293	133	1,424	133
Depreciation	447	552	1,122	1,096
Amortization of intangibles	2,140	312	4,269	625
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0	0	0
Adjusted EBITDA	(11,102)	(6,832)	(24,042)	(21,564)
Operating segments | Applications
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	33,077	39,134	58,538	71,902
Stock-based compensation expense	0	0	0	0
Depreciation	773	921	1,528	1,932
Amortization of intangibles	1,554	491	2,090	1,097
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0	0	548
Adjusted EBITDA	35,404	40,546	62,156	75,479
Operating segments | Publishing
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	12,807	(2,857)	28,618	(8,645)
Stock-based compensation expense	0	0	0	0
Depreciation	469	930	1,131	2,949
Amortization of intangibles	479	4,667	1,219	9,615
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0	0	0
Adjusted EBITDA	13,755	2,740	30,968	3,919
Operating segments | Other
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	0	0	0	(5,621)
Stock-based compensation expense	0	0	0	1,729
Depreciation				836
Amortization of intangibles	0	0	0	1,524
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0	0	0
Adjusted EBITDA	0	0	0	(1,532)
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income	(35,892)	(31,647)	(72,816)	(60,616)
Stock-based compensation expense	17,509	11,289	34,591	21,050
Depreciation	2,831	4,835	5,665	9,728
Amortization of intangibles	0	0	0	0
Acquisition-related Contingent Consideration Fair Value Adjustments	0	0	0	0
Adjusted EBITDA	$ (15,552)	$ (15,523)	$ (32,560)	$ (29,838)

OTHER INCOME, NET - Narrative (

OTHER INCOME, NET - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Abstract]
Net unrealized mark-to-market gains on equity investments	$ 126,414	$ 8,000	$ 126,559	$ 10,600
Realized gains on equity investments	27,300		27,200
Net foreign currency exchange gains (losses)	10,000	(3,600)	2,100	(6,200)
Interest income	$ 7,000	2,500	$ 12,200	4,100
Realized gains (losses) on investments		21,200		21,300
Other-than-temporary impairment charge		$ 1,400		$ 4,800

OTHER INCOME, NET - Summary (De

OTHER INCOME, NET - Summary (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Abstract]
Other income, net	$ 171,141	$ 10,230	$ 166,522	$ 2,516

GUARANTOR AND NON-GUARANTOR F61

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - Narrative (Details)	Jun. 30, 2018
4.75% Senior Notes due December 15, 2022 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.75%

GUARANTOR AND NON-GUARANTOR F62

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 1,644,829	$ 1,630,809	$ 1,522,300	$ 1,329,187
Marketable securities	120,410	4,995
Accounts receivable, net of allowance	343,576	304,027
Other current assets	237,957	185,374
Intercompany receivables	0	0
Property and equipment, net of accumulated depreciation and amortization	306,602	315,170
Goodwill	2,578,296	2,559,066
Intangible assets, net of accumulated amortization	636,351	663,737
Investment in subsidiaries	0	0
Other non-current assets	367,263	204,632
TOTAL ASSETS	6,235,284	5,867,810
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of long-term debt	13,750	13,750
Accounts payable, trade	79,107	76,571
Other current liabilities	752,823	709,407
Long-term debt, net	1,982,271	1,979,469
Income taxes payable	23,942	25,624
Intercompany liabilities	0	0
Other long-term liabilities	70,724	73,299
Redeemable noncontrolling interests	75,719	42,867
Shareholders' equity (deficit)	2,576,079	2,430,028
Noncontrolling interests	660,869	516,795
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	6,235,284	5,867,810
Reportable Legal Entities | IAC
ASSETS
Cash and cash equivalents	813,872	585,639
Marketable securities	119,746	4,995
Accounts receivable, net of allowance	0	31
Other current assets	45,720	49,159
Intercompany receivables	0	0
Property and equipment, net of accumulated depreciation and amortization	4,306	2,811
Goodwill	0	0
Intangible assets, net of accumulated amortization	0	0
Investment in subsidiaries	1,828,822	2,077,898
Other non-current assets	227,459	170,073
TOTAL ASSETS	3,039,925	2,890,606
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of long-term debt	0	0
Accounts payable, trade	642	5,163
Other current liabilities	28,128	29,489
Long-term debt, net	34,233	34,572
Income taxes payable	0	16
Intercompany liabilities	400,448	390,827
Other long-term liabilities	395	511
Redeemable noncontrolling interests	0	0
Shareholders' equity (deficit)	2,576,079	2,430,028
Noncontrolling interests	0	0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,039,925	2,890,606
Reportable Legal Entities | Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	0	0
Marketable securities	0	0
Accounts receivable, net of allowance	118,672	109,289
Other current assets	26,123	33,387
Intercompany receivables	1,129,828	668,703
Property and equipment, net of accumulated depreciation and amortization	168,685	174,323
Goodwill	412,010	412,010
Intangible assets, net of accumulated amortization	73,933	74,852
Investment in subsidiaries	202,616	554,998
Other non-current assets	83,005	87,306
TOTAL ASSETS	2,214,872	2,114,868
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of long-term debt	0	0
Accounts payable, trade	37,027	30,469
Other current liabilities	89,902	88,050
Long-term debt, net	0	0
Income taxes payable	1,434	1,605
Intercompany liabilities	0	0
Other long-term liabilities	18,779	18,613
Redeemable noncontrolling interests	0	0
Shareholders' equity (deficit)	2,067,730	1,976,131
Noncontrolling interests	0	0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,214,872	2,114,868
Reportable Legal Entities | Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	830,957	1,045,170
Marketable securities	664	0
Accounts receivable, net of allowance	224,904	194,707
Other current assets	166,114	102,828
Intercompany receivables	0	0
Property and equipment, net of accumulated depreciation and amortization	133,611	138,036
Goodwill	2,166,286	2,147,056
Intangible assets, net of accumulated amortization	562,418	588,885
Investment in subsidiaries	0	0
Other non-current assets	222,638	79,688
TOTAL ASSETS	4,307,592	4,296,370
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of long-term debt	13,750	13,750
Accounts payable, trade	41,438	40,939
Other current liabilities	634,793	591,868
Long-term debt, net	1,948,038	1,944,897
Income taxes payable	22,508	24,003
Intercompany liabilities	729,380	277,876
Other long-term liabilities	217,389	186,610
Redeemable noncontrolling interests	75,719	42,867
Shareholders' equity (deficit)	(36,292)	656,765
Noncontrolling interests	660,869	516,795
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,307,592	4,296,370
Eliminations
ASSETS
Cash and cash equivalents	0	0
Marketable securities	0	0
Accounts receivable, net of allowance	0	0
Other current assets	0	0
Intercompany receivables	(1,129,828)	(668,703)
Property and equipment, net of accumulated depreciation and amortization	0	0
Goodwill	0	0
Intangible assets, net of accumulated amortization	0	0
Investment in subsidiaries	(2,031,438)	(2,632,896)
Other non-current assets	(165,839)	(132,435)
TOTAL ASSETS	(3,327,105)	(3,434,034)
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of long-term debt	0	0
Accounts payable, trade	0	0
Other current liabilities	0	0
Long-term debt, net	0	0
Income taxes payable	0	0
Intercompany liabilities	(1,129,828)	(668,703)
Other long-term liabilities	(165,839)	(132,435)
Redeemable noncontrolling interests	0	0
Shareholders' equity (deficit)	(2,031,438)	(2,632,896)
Noncontrolling interests	0	0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ (3,327,105)	$ (3,434,034)

GUARANTOR AND NON-GUARANTOR F63

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Guarantor and Nonguarantor Financial Statements [Abstract]
Foreign earnings repatriated			$ 50,000
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 1,059,122	$ 767,387	2,054,197	$ 1,528,220
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	218,224	139,033	420,186	284,991
Selling and marketing expense	369,660	320,104	772,492	670,515
General and administrative expense	188,363	150,222	372,547	293,817
Product development expense	75,445	55,430	152,382	110,190
Depreciation	18,805	18,339	38,062	38,227
Amortization of intangibles	20,188	8,624	40,141	17,785
Total operating costs and expenses	890,685	691,752	1,795,810	1,415,525
Operating income	168,437	75,635	258,387	112,695
Equity in earnings of unconsolidated affiliates	0	0	0	0
Interest expense	(27,356)	(24,728)	(53,861)	(49,520)
Other income, net	171,141	10,230	166,522	2,516
Earnings before income taxes	312,222	61,137	371,048	65,691
Income tax benefit (provision)	(31,368)	19,420	(2,355)	43,329
Net earnings	280,854	80,557	368,693	109,020
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Net earnings attributable to IAC shareholders	218,353	66,268	289,435	92,477
Comprehensive income (loss) attributable to IAC shareholders	180,909	76,875	280,348	121,862
Reportable Legal Entities | IAC
Condensed Financial Statements, Captions [Line Items]
Revenue	0	0	0	0
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	75	47	151	160
Selling and marketing expense	189	613	402	939
General and administrative expense	31,652	35,778	63,061	61,914
Product development expense	564	936	1,216	1,506
Depreciation	266	445	532	883
Amortization of intangibles	0	0	0	0
Total operating costs and expenses	32,746	37,819	65,362	65,402
Operating income	(32,746)	(37,819)	(65,362)	(65,402)
Equity in earnings of unconsolidated affiliates	233,980	91,382	336,730	142,838
Interest expense	(423)	(5,648)	(852)	(11,476)
Other income, net	6,436	(6,821)	(10,411)	(12,626)
Earnings before income taxes	207,247	41,094	260,105	53,334
Income tax benefit (provision)	11,106	25,174	29,330	39,143
Net earnings	218,353	66,268	289,435	92,477
Net earnings attributable to noncontrolling interests	0	0	0	0
Net earnings attributable to IAC shareholders	218,353	66,268	289,435	92,477
Comprehensive income (loss) attributable to IAC shareholders	180,909	76,875	280,348	121,862
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	207,964	169,831	420,853	351,403
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	61,215	30,131	117,439	62,839
Selling and marketing expense	80,302	82,268	170,440	174,218
General and administrative expense	14,259	14,785	29,640	30,375
Product development expense	14,151	13,792	28,420	29,179
Depreciation	3,126	5,884	6,466	13,017
Amortization of intangibles	410	4,667	919	9,752
Total operating costs and expenses	173,463	151,527	353,324	319,380
Operating income	34,501	18,304	67,529	32,023
Equity in earnings of unconsolidated affiliates	8,630	4,706	8,303	2,023
Interest expense	0	0	0	0
Other income, net	62,204	6,807	349,087	12,898
Earnings before income taxes	105,335	29,817	424,919	46,944
Income tax benefit (provision)	(27,557)	(1,139)	(38,523)	(10,828)
Net earnings	77,778	28,678	386,396	36,116
Net earnings attributable to noncontrolling interests	0	0	0	0
Net earnings attributable to IAC shareholders	77,778	28,678	386,396	36,116
Comprehensive income (loss) attributable to IAC shareholders	77,482	30,852	386,443	42,343
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	851,240	597,724	1,633,500	1,177,198
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	156,991	108,989	302,703	222,299
Selling and marketing expense	289,205	237,269	601,731	495,458
General and administrative expense	142,441	99,647	279,814	201,502
Product development expense	60,730	40,702	122,746	79,505
Depreciation	15,413	12,010	31,064	24,327
Amortization of intangibles	19,778	3,957	39,222	8,033
Total operating costs and expenses	684,558	502,574	1,377,280	1,031,124
Operating income	166,682	95,150	256,220	146,074
Equity in earnings of unconsolidated affiliates	0	0	0	0
Interest expense	(26,933)	(19,080)	(53,009)	(38,044)
Other income, net	153,770	10,244	155,960	2,244
Earnings before income taxes	293,519	86,314	359,171	110,274
Income tax benefit (provision)	(14,917)	(4,615)	6,838	15,014
Net earnings	278,602	81,699	366,009	125,288
Net earnings attributable to noncontrolling interests	(62,501)	(14,289)	(79,258)	(16,543)
Net earnings attributable to IAC shareholders	216,101	67,410	286,751	108,745
Comprehensive income (loss) attributable to IAC shareholders	170,613	85,140	275,940	148,908
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue	(82)	(168)	(156)	(381)
Operating costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	(57)	(134)	(107)	(307)
Selling and marketing expense	(36)	(46)	(81)	(100)
General and administrative expense	11	12	32	26
Product development expense	0	0	0	0
Depreciation	0	0	0	0
Amortization of intangibles	0	0	0	0
Total operating costs and expenses	(82)	(168)	(156)	(381)
Operating income	0	0	0	0
Equity in earnings of unconsolidated affiliates	(242,610)	(96,088)	(345,033)	(144,861)
Interest expense	0	0	0	0
Other income, net	(51,269)	0	(328,114)	0
Earnings before income taxes	(293,879)	(96,088)	(673,147)	(144,861)
Income tax benefit (provision)	0	0	0	0
Net earnings	(293,879)	(96,088)	(673,147)	(144,861)
Net earnings attributable to noncontrolling interests	0	0	0	0
Net earnings attributable to IAC shareholders	(293,879)	(96,088)	(673,147)	(144,861)
Comprehensive income (loss) attributable to IAC shareholders	$ (248,095)	$ (115,992)	$ (662,383)	$ (191,251)

GUARANTOR AND NON-GUARANTOR F64

GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities			$ 379,802	$ 157,714
Cash flows from investing activities:
Acquisitions, net of cash acquired			(17,513)	(49,164)
Capital expenditures			(39,696)	(41,821)
Proceeds from maturities and sales of marketable debt securities	$ 5,000	$ 24,000	10,000	99,350
Purchases of marketable debt securities			(124,397)	(24,909)
Purchases of investments			(31,180)	(5,105)
Net cash (used in) provided by investing activities			27,540	119,697
Other, net			9,599	1,076
Net cash (used in) provided by investing activities			(165,647)	99,124
Cash flows from financing activities:
Purchase of noncontrolling interests			(877)	(12,361)
Acquisition-related contingent consideration payments			(185)	(3,860)
Intercompany			0	0
Other, net			(4,813)	(4,873)
Net cash used in financing activities			(202,705)	(99,880)
Total cash provided			11,450	156,958
Effect of exchange rate changes on cash, cash equivalents, and restricted cash			44	5,474
Net increase in cash, cash equivalents, and restricted cash			11,494	162,432
Cash, cash equivalents, and restricted cash at beginning of period			1,633,682	1,360,199
Cash, cash equivalents, and restricted cash at end of period	1,645,176	1,522,631	1,645,176	1,522,631
Reportable Legal Entities | IAC
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities			(24,698)	(40,671)
Cash flows from investing activities:
Acquisitions, net of cash acquired			(4,142)	0
Capital expenditures			(2,200)	(216)
Proceeds from maturities and sales of marketable debt securities			10,000	99,350
Purchases of marketable debt securities			(124,397)	(24,909)
Purchases of investments			(18,180)	0
Net cash (used in) provided by investing activities			408	0
Other, net			(5,000)	0
Net cash (used in) provided by investing activities			(143,511)	74,225
Cash flows from financing activities:
Purchase of noncontrolling interests			0	0
Acquisition-related contingent consideration payments			0	0
Intercompany			375,167	54,316
Other, net			2,674	251
Net cash used in financing activities			396,431	(35,201)
Total cash provided			228,222	(1,647)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash			11	36
Net increase in cash, cash equivalents, and restricted cash			228,233	(1,611)
Cash, cash equivalents, and restricted cash at beginning of period			585,639	573,784
Cash, cash equivalents, and restricted cash at end of period	813,872	572,173	813,872	572,173
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities			418,153	40,314
Cash flows from investing activities:
Acquisitions, net of cash acquired			0	(2,200)
Capital expenditures			(847)	(657)
Proceeds from maturities and sales of marketable debt securities			0	0
Purchases of marketable debt securities			0	0
Purchases of investments			0	0
Net cash (used in) provided by investing activities			0	0
Other, net			3,884	120
Net cash (used in) provided by investing activities			3,037	(2,737)
Cash flows from financing activities:
Purchase of noncontrolling interests			0	0
Acquisition-related contingent consideration payments			0	0
Intercompany			(421,190)	(37,577)
Net cash used in financing activities			(421,190)	(37,577)
Net increase in cash, cash equivalents, and restricted cash			0	0
Cash, cash equivalents, and restricted cash at end of period	0	0	0	0
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities			314,884	158,071
Cash flows from investing activities:
Acquisitions, net of cash acquired			(13,371)	(46,964)
Capital expenditures			(36,649)	(40,948)
Proceeds from maturities and sales of marketable debt securities			0	0
Purchases of marketable debt securities			0	0
Purchases of investments			(13,000)	(5,105)
Net cash (used in) provided by investing activities			27,132	119,697
Other, net			10,715	956
Net cash (used in) provided by investing activities			(25,173)	27,636
Cash flows from financing activities:
Purchase of noncontrolling interests			(877)	(12,361)
Acquisition-related contingent consideration payments			(185)	(3,860)
Intercompany			(282,514)	(16,739)
Other, net			(7,487)	(5,124)
Net cash used in financing activities			(506,483)	(27,102)
Total cash provided			(216,772)	158,605
Effect of exchange rate changes on cash, cash equivalents, and restricted cash			33	5,438
Net increase in cash, cash equivalents, and restricted cash			(216,739)	164,043
Cash, cash equivalents, and restricted cash at beginning of period			1,048,043	786,415
Cash, cash equivalents, and restricted cash at end of period	831,304	$ 950,458	831,304	950,458
Eliminations
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used in) provided by operating activities			(328,537)
Cash flows from investing activities:
Acquisitions, net of cash acquired			0
Capital expenditures			0
Proceeds from maturities and sales of marketable debt securities			0
Purchases of marketable debt securities			0
Purchases of investments			0
Net cash (used in) provided by investing activities			0
Other, net			0
Net cash (used in) provided by investing activities			0
Cash flows from financing activities:
Purchase of noncontrolling interests			0
Acquisition-related contingent consideration payments			0
Intercompany			328,537
Net cash used in financing activities			328,537
Net increase in cash, cash equivalents, and restricted cash			0
Cash, cash equivalents, and restricted cash at end of period	$ 0		0
ANGI Homeservices
Cash flows from financing activities:
Principal payments on ANGI Homeservices debt			(6,875)	0
ANGI Homeservices | Reportable Legal Entities | IAC
Cash flows from financing activities:
Principal payments on ANGI Homeservices debt			0
ANGI Homeservices | Reportable Legal Entities | Guarantor Subsidiaries
Cash flows from financing activities:
Principal payments on ANGI Homeservices debt			0
ANGI Homeservices | Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from financing activities:
Principal payments on ANGI Homeservices debt			(6,875)
ANGI Homeservices | Eliminations
Cash flows from financing activities:
Principal payments on ANGI Homeservices debt			0
IAC/InterActiveCorp
Cash flows from financing activities:
Repurchases of IAC debt			(363)	(31,590)
Purchase of treasury stock			(7,869)	(56,424)
Proceeds from the exercise of stock options			27,317	48,146
Withholding taxes paid on behalf of employees on net settled stock-based awards			(495)	(49,900)
IAC/InterActiveCorp | Reportable Legal Entities | IAC
Cash flows from financing activities:
Repurchases of IAC debt			(363)	(31,590)
Purchase of treasury stock			(7,869)	(56,424)
Proceeds from the exercise of stock options			27,317	48,146
Withholding taxes paid on behalf of employees on net settled stock-based awards			(495)	(49,900)
IAC/InterActiveCorp | Reportable Legal Entities | Guarantor Subsidiaries
Cash flows from financing activities:
Repurchases of IAC debt			0	0
Proceeds from the exercise of stock options			0	0
Withholding taxes paid on behalf of employees on net settled stock-based awards			0	0
IAC/InterActiveCorp | Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from financing activities:
Repurchases of IAC debt			0	0
Proceeds from the exercise of stock options			0	0
Withholding taxes paid on behalf of employees on net settled stock-based awards			0	0
IAC/InterActiveCorp | Eliminations
Cash flows from financing activities:
Repurchases of IAC debt			0
Proceeds from the exercise of stock options			0
Withholding taxes paid on behalf of employees on net settled stock-based awards			0
Match Group
Cash flows from financing activities:
Purchase of treasury stock			(73,943)	0
Match Group | Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from financing activities:
Purchase of treasury stock			(73,943)
Match Group and ANGI Homeservices
Cash flows from financing activities:
Proceeds from the exercise of stock options			2,125	39,403
Withholding taxes paid on behalf of employees on net settled stock-based awards			(136,727)	(28,421)
Match Group and ANGI Homeservices | Reportable Legal Entities | IAC
Cash flows from financing activities:
Proceeds from the exercise of stock options			0	0
Withholding taxes paid on behalf of employees on net settled stock-based awards			0	0
Match Group and ANGI Homeservices | Reportable Legal Entities | Guarantor Subsidiaries
Cash flows from financing activities:
Proceeds from the exercise of stock options			0	0
Withholding taxes paid on behalf of employees on net settled stock-based awards			0	0
Match Group and ANGI Homeservices | Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from financing activities:
Proceeds from the exercise of stock options			2,125	39,403
Withholding taxes paid on behalf of employees on net settled stock-based awards			(136,727)	$ (28,421)
Match Group and ANGI Homeservices | Eliminations
Cash flows from financing activities:
Proceeds from the exercise of stock options			0
Withholding taxes paid on behalf of employees on net settled stock-based awards			$ 0