INCOME TAXES - Expected And Reported Income Taxes (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate			35.00%
Federal statutory income tax rate - revised			21.00%
Income taxes (benefit)	$ 249	$ 3,832	$ (3,260)	$ (7,830)
Effective income tax rate	13.50%	37.40%	20.50%	72.90%
Impairment loss	$ 28,988	$ 441	$ 28,988	$ 441
IncomeTaxExpenseBenefitIntraperiodTaxAllocation					$ 800