INCOME TAXES Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Current Federal Tax Benefit (Expense)	$ 8,443	$ 9,646	$ (2,944)
Current State and Local Tax Benefit (Expense)	(200)	300	(163)
Current Income Tax Benefit (Expense)	8,243	9,946	(3,107)
Deferred Federal Income Tax Benefit (Expense)	193,809	118,427	37,352
Deferred State and Local Income Tax Benefit (Expense)	9,876	18,822	4,063
Deferred Income Tax Benefit (Expense)	203,685	137,249	41,415
Provision for income taxes	$ 211,928	$ 147,195	$ 38,308