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INCOME TAXES (Computation of Income Tax Expense by Applying Federal Corporate Tax Rate) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
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 $ 21,672 $ 15,226 $ 42,911
Increase (decrease) in valuation allowance, net 4,419 8,033 (175)
State income taxes, net of Federal income tax benefit 417 (4,933) 1,408
Tax benefit from Tax Act 0 0 (101,688)
Tax expense (benefit) from other change in rates, prior period adjustments and other permanent differences 250 (1,292) 2,941
Tax benefit on equity compensation (317) (1,490) (6,403)
Tax expense on compensation disallowance 2,804 1,168 0
Tax benefit on historic tax credit 0 (1,220) 0
Non-deductible warrant liability loss 0 0 15,205
Income tax expense (benefit) $ 29,245 $ 15,492 $ (45,801)