INCOME TAXES - Reconciliation of income tax (expense) benefit (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense - excluding excess tax benefit on stock compensation and CARES Act	$ (8,670)	$ (4,097)
Excess tax benefit on stock compensation	32	1,054
Income tax benefit from CARES Act	0	6,104
Income tax (expense) benefit	$ (8,638)	$ 3,061