INCOME TAXES (Computation of Income Tax Expense by Applying Federal Corporate Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	$ 15,226	$ 42,911	$ 112,264
Increase (decrease) in valuation allowance, net	8,033	(175)	(1,326)
State income taxes, net of Federal income tax benefit	(4,933)	1,408	4,004
Tax benefit from Tax Act	0	(101,688)	0
Tax expense (benefit) from other change in rates, prior period adjustments and other permanent differences	(1,292)	2,941	(4,591)
Tax benefit on equity compensation	(1,490)	(6,403)	0
Tax expense on compensation disallowance	1,168	0	0
Tax benefit on historic tax credit	(1,220)	0	0
Non-deductible warrant liability loss	0	15,205	8,544
Uncertain tax position benefit, excluding interest	0	0	(407)
Uncertain tax position interest, net of Federal income tax benefit	0	0	(38)
Income tax expense (benefit)	$ 15,492	$ (45,801)	$ 118,450