INCOME TAXES - SCHEDULE OF DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Accrued expenses	$ 36,418	$ 34,654
Net operating loss carryforwards	68,048	55,579
Tax credit carryforwards	13,753	13,585
Stock-based compensation	76,285	69,342
Cost method investments	6,251	27,581
Equity method investments	17,105	14,998
Other	16,057	12,322
Total deferred tax assets	233,917	228,061
Less valuation allowance	(90,482)	(98,350)
Net deferred tax assets	143,435	129,711
Deferred tax liabilities:
Investment in subsidiaries	(382,254)	(378,769)
Intangible and other assets	(88,846)	(115,470)
Other	(19,138)	(25,883)
Total deferred tax liabilities	(490,238)	(520,122)
Total deferred tax liabilities	$ (346,803)	$ (390,411)