INCOME TAXES - Income Taxes from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings (loss) from continuing operations before income taxes:
United States	$ (126,537)	$ (44,668)	$ 371,925
Foreign	(3,823)	2,397	17,544
Earnings (loss) from continuing operations before income taxes	(130,360)	(42,271)	389,469
Current tax expense (benefit) from continuing operations:
Federal	(642)	(1,065)	(23,333)
State	9,523	9,187	6,862
Foreign	5,620	5,210	10,123
Total	14,501	13,332	(6,348)
Deferred tax expense (benefit) from continuing operations:
Federal	(27,534)	(8,228)	113,764
State	(10,263)	(18,790)	1,250
Foreign	4,932	(5,313)	(6,119)
Total	(32,865)	(32,331)	108,895
Total	$ (18,364)	$ (18,999)	102,547
Alternative minimum tax refunds, net of sequestration charge			$ 22,000