INCOME TAXES - Reconciliation of income tax (expense) benefit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax benefit (expense) - excluding excess tax benefit on stock compensation and CARES Act	$ 3,127	$ (2,034)	$ (970)	$ (284)
Excess tax benefit on stock compensation	753	7,723	1,807	13,725
Income tax benefit from CARES Act	0	0	6,104	0
Income tax benefit	$ 3,880	$ 5,689	$ 6,941	$ 13,441