INCOME TAXES - SCHEDULE OF INCOME TAXES (PAYABLE) RECEIVABLE AND DEFERRED TAX (LIABILITIES) ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Taxes (Payable) Receivable and Deferred Tax (Liabilities) Assets
Other current assets	$ 26,793	$ 4,505
Accrued expenses and other current liabilities	(33,029)	(41,157)
Income taxes payable	(33,692)	(32,635)
Net income taxes payable	(38,364)	(67,809)
Deferred income taxes	(348,773)	(391,790)
Net deferred tax liabilities	(346,803)	(390,411)
Other current assets
Income Taxes (Payable) Receivable and Deferred Tax (Liabilities) Assets
Other current assets	26,793	4,505
Other non-current assets
Income Taxes (Payable) Receivable and Deferred Tax (Liabilities) Assets
Other non-current assets	1,564	1,478
Other non-current assets	1,970	1,379
Accrued expenses and other current liabilities
Income Taxes (Payable) Receivable and Deferred Tax (Liabilities) Assets
Accrued expenses and other current liabilities	(33,029)	(41,157)
Income taxes payable
Income Taxes (Payable) Receivable and Deferred Tax (Liabilities) Assets
Income taxes payable	(33,692)	(32,635)
Deferred income taxes
Income Taxes (Payable) Receivable and Deferred Tax (Liabilities) Assets
Deferred income taxes	$ (348,773)	$ (391,790)