SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment reporting information
Revenue	$ 830,754	$ 782,231	$ 756,315	$ 740,247	$ 724,455	$ 756,872	$ 799,411	$ 742,249	$ 3,109,547	$ 3,022,987	$ 2,800,933
Adjusted EBITDA									544,076	598,303	497,445
Segment Assets	2,028,016				2,114,025				2,028,016	2,114,025
Capital expenditures									57,233	80,311	51,201
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments [Abstract]
Non-Cash Compensation Expense									(59,634)	(53,005)	(85,625)
Depreciation									(61,156)	(58,909)	(52,481)
Amortization of Intangibles									(57,926)	(59,843)	(35,771)
Acquisition-related contingent consideration fair value adjustments									13,367	(343)	0
Operating income	110,372	100,953	95,690	71,712	112,952	122,004	106,696	84,551	378,727	426,203	323,568
Reconciliation of segment assets to total assets
Segment Assets	2,028,016				2,114,025				2,028,016	2,114,025
Goodwill	1,754,926				1,675,323				1,754,926	1,675,323	1,616,154
Indefinite-Lived Intangible Assets	405,234				376,329				405,234	376,329
Definite-Lived Intangible Assets	86,702				69,007				86,702	69,007
TOTAL ASSETS	4,274,878				4,234,684				4,274,878	4,234,684
Search & Applications
Segment reporting information
Revenue									1,596,251	1,604,950	1,465,795
Adjusted EBITDA									362,029	385,851	328,141
Segment Assets	341,886				409,116				341,886	409,116
Capital expenditures									17,701	22,215	15,320
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments [Abstract]
Non-Cash Compensation Expense										(3)	(34)
Depreciation									(16,461)	(18,177)	(14,995)
Amortization of Intangibles									(33,902)	(27,554)	(7,468)
Acquisition-related contingent consideration fair value adjustments									(326)
Operating income									311,340	340,117	305,644
Reconciliation of segment assets to total assets
Segment Assets	341,886				409,116				341,886	409,116
Goodwill	774,822				738,062				774,822	738,062	723,650
Indefinite-Lived Intangible Assets	211,095				195,805				211,095	195,805
Definite-Lived Intangible Assets	44,355				40,550				44,355	40,550
TOTAL ASSETS	1,372,158				1,383,533				1,372,158	1,383,533
The Match Group
Segment reporting information
Revenue									897,245	805,390	714,222
Adjusted EBITDA									264,736	266,949	236,778
Segment Assets	297,166				341,377				297,166	341,377
Capital expenditures									22,105	19,997	19,853
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments [Abstract]
Non-Cash Compensation Expense									287	(1,122)	(2,818)
Depreciation									(25,628)	(20,203)	(16,339)
Amortization of Intangibles									(11,395)	(17,126)	(17,455)
Acquisition-related contingent consideration fair value adjustments									12,912	(343)
Operating income									240,912	228,155	200,166
Reconciliation of segment assets to total assets
Segment Assets	297,166				341,377				297,166	341,377
Goodwill	798,797				775,403				798,797	775,403	718,736
Indefinite-Lived Intangible Assets	180,558				167,544				180,558	167,544
Definite-Lived Intangible Assets	27,055				11,818				27,055	11,818
TOTAL ASSETS	1,303,576				1,296,142				1,303,576	1,296,142
Media
Segment reporting information
Revenue									181,780	191,434	164,051
Adjusted EBITDA									(36,720)	(16,976)	(38,555)
Segment Assets	87,448				92,500				87,448	92,500
Capital expenditures									1,566	1,197	1,178
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments [Abstract]
Non-Cash Compensation Expense									(647)	(633)	(770)
Depreciation									(927)	(2,124)	(1,398)
Amortization of Intangibles									(2,098)	(1,070)	(6,179)
Acquisition-related contingent consideration fair value adjustments									215
Operating income									(40,177)	(20,803)	(46,902)
Reconciliation of segment assets to total assets
Segment Assets	87,448				92,500				87,448	92,500
Goodwill	8,267				8,267				8,267	8,267
Indefinite-Lived Intangible Assets	1,800				1,800				1,800	1,800
Definite-Lived Intangible Assets	4,900				944				4,900	944
TOTAL ASSETS	102,415				103,511				102,415	103,511
Total eCommerce
Segment reporting information
Revenue									435,361	422,066	457,182
Adjusted EBITDA									17,282	22,890	31,200
Segment Assets	50,133				41,827				50,133	41,827
Capital expenditures									9,620	8,921	8,485
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments [Abstract]
Non-Cash Compensation Expense									(559)	29	2
Depreciation									(8,015)	(8,887)	(11,210)
Amortization of Intangibles									(10,531)	(14,093)	(4,669)
Acquisition-related contingent consideration fair value adjustments									566
Operating income									(1,257)	(61)	15,323
Reconciliation of segment assets to total assets
Segment Assets	50,133				41,827				50,133	41,827
Goodwill	173,040				153,591				173,040	153,591	165,501
Indefinite-Lived Intangible Assets	11,781				11,180				11,781	11,180
Definite-Lived Intangible Assets	10,392				15,695				10,392	15,695
TOTAL ASSETS	245,346				222,293				245,346	222,293
Eliminations
Segment reporting information
Revenue									(1,090)	(853)	(317)
Corporate
Segment reporting information
Adjusted EBITDA									(63,251)	(60,411)	(60,119)
Segment Assets	1,251,383				1,229,205				1,251,383	1,229,205
Capital expenditures									6,241	27,981	6,365
Reconciliation of Adjusted EBITDA to operating income (loss) for the entity's reportable segments [Abstract]
Non-Cash Compensation Expense									(58,715)	(51,276)	(82,005)
Depreciation									(10,125)	(9,518)	(8,539)
Acquisition-related contingent consideration fair value adjustments									0
Operating income									(132,091)	(121,205)	(150,663)
Reconciliation of segment assets to total assets
Segment Assets	1,251,383				1,229,205				1,251,383	1,229,205
TOTAL ASSETS	$ 1,251,383				$ 1,229,205				$ 1,251,383	$ 1,229,205