SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment reporting information
Revenue	$ 771,132	$ 756,315	$ 1,543,644	$ 1,496,562
Operating income	62,769	95,690	97,888	167,402
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	108,679	141,432	183,836	249,527
Stock-Based Compensation Expense	(25,949)	(16,552)	(44,860)	(26,165)
Depreciation	(15,500)	(15,257)	(31,068)	(30,075)
Amortization of Intangibles	(14,411)	(13,406)	(26,966)	(25,385)
Acquisition-related contingent consideration fair value adjustments	9,950	(527)	16,946	(500)
Operating income	62,769	95,690	97,888	167,402
Operating segments | Search & Applications
Segment reporting information
Revenue	351,366	395,716	734,264	793,751
Operating income	68,592	77,771	132,892	148,108
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	72,910	91,258	151,811	173,329
Stock-Based Compensation Expense	0	0	0	0
Depreciation	(3,685)	(5,082)	(7,301)	(9,547)
Amortization of Intangibles	(6,930)	(8,405)	(13,895)	(15,674)
Acquisition-related contingent consideration fair value adjustments	6,297	0	2,277	0
Operating income	68,592	77,771	132,892	148,108
Operating segments | The Match Group
Segment reporting information
Revenue	254,690	214,314	493,901	425,501
Operating income	51,441	61,198	76,753	101,001
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	64,822	69,368	90,678	116,798
Stock-Based Compensation Expense	(2,056)	(170)	(2,669)	(187)
Depreciation	(6,647)	(5,589)	(13,712)	(11,389)
Amortization of Intangibles	(5,901)	(1,684)	(9,778)	(3,521)
Acquisition-related contingent consideration fair value adjustments	1,223	(727)	12,234	(700)
Operating income	51,441	61,198	76,753	101,001
Operating segments | Media
Segment reporting information
Revenue	36,210	36,656	79,822	73,011
Operating income	(13,775)	(9,794)	(29,127)	(18,360)
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	(15,452)	(8,911)	(30,035)	(16,775)
Stock-Based Compensation Expense	(147)	(161)	(294)	(325)
Depreciation	(228)	(224)	(432)	(506)
Amortization of Intangibles	(378)	(698)	(801)	(954)
Acquisition-related contingent consideration fair value adjustments	2,430	200	2,435	200
Operating income	(13,775)	(9,794)	(29,127)	(18,360)
Operating segments | eCommerce
Segment reporting information
Revenue	128,986	109,949	235,996	204,791
Operating income	(1,004)	8	(7,858)	(1,553)
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	2,681	4,523	(456)	7,327
Stock-Based Compensation Expense	(420)	0	(840)	0
Depreciation	(2,063)	(1,896)	(4,070)	(3,644)
Amortization of Intangibles	(1,202)	(2,619)	(2,492)	(5,236)
Acquisition-related contingent consideration fair value adjustments	0	0	0	0
Operating income	(1,004)	8	(7,858)	(1,553)
Intersegment eliminations
Segment reporting information
Revenue	(120)	(320)	(339)	(492)
Corporate
Segment reporting information
Operating income	(42,485)	(33,493)	(74,772)	(61,794)
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments
Adjusted EBITDA	(16,282)	(14,806)	(28,162)	(31,152)
Stock-Based Compensation Expense	(23,326)	(16,221)	(41,057)	(25,653)
Depreciation	(2,877)	(2,466)	(5,553)	(4,989)
Amortization of Intangibles	0	0	0	0
Acquisition-related contingent consideration fair value adjustments	0	0	0	0
Operating income	$ (42,485)	$ (33,493)	$ (74,772)	$ (61,794)