INCOME TAXES - Schedule of Provision (benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 122,128	$ 57,694	$ 97,432
Current provision for income taxes:
Federal	113,737	80,420	92,609
State	2,273	5,720	5,641
Current income tax expense (benefit)	116,010	86,140	98,250
Deferred provision (benefit) for income taxes:
Federal	8,555	(26,637)	3,170
State	(2,437)	(1,809)	(3,988)
Deferred income tax expense (benefit)	6,118	(28,446)	(818)
Provision for income taxes	$ 122,128	$ 57,694	$ 97,432