INCOME TAXES - Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 20,751	$ 38,481	$ 5,178
State	11,685	17,836	1,289
Total current	32,436	56,317	6,467
Deferred:
Federal	(837)	(37,678)	(295,467)
State	5,607	(22,792)	31,915
Total deferred	4,770	(60,470)	(263,552)
Total income taxes (benefit)	37,206	(4,153)	$ (257,085)
Tax expense from discontinued operations	$ 700	$ 500