INCOME TAXES - Reconciliation of income tax (expense) benefit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax benefit (expense) - excluding excess tax benefit on stock compensation and CARES Act	$ 7,750	$ (4,705)	$ 6,780	$ (4,989)
Excess tax benefit on stock compensation	175	2,816	1,982	16,541
Income tax benefit from CARES Act	0	0	6,104	0
Income tax benefit (expense)	$ 7,925	$ (1,889)	$ 14,866	$ 11,552