INCOME TAXES (Computation of Income Tax Expense by Applying Federal Corporate Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of income tax expense computed by applying the Federal corporate tax rate to the provision for income taxes
Tax at statutory rate on earnings from continuing operations before income taxes	$ 42,911	$ 112,264	$ 52,751
(Decrease) increase in valuation allowance, net	(175)	(1,326)	1,742
State income taxes, net of Federal income tax benefit	1,408	4,004	267
Tax benefit from Tax Act	(101,688)
Tax expense (benefit) from other change in rates, prior period adjustments and other permanent differences	2,941	(4,591)	(7,361)
Tax benefit on equity compensation	(6,403)
Non-deductible warrant liability (gain) loss	15,205	8,544	(20,412)
Uncertain tax position (benefit) expense, excluding interest		(407)	(2,483)
Uncertain tax position interest, net of Federal income tax benefit		(38)	(503)
Provision for (benefit from) income taxes	$ (45,801)	$ 118,450	$ 24,001