LEASES - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows used for operating leases	$ (33,842)	$ (30,665)
Operating cash flows used for finance leases	(468)	(498)
Right-of-use assets obtained in exchange for operating lease obligations	$ 8,714	$ 36,033