LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 9,228	$ 12,940
Operating cash flows for financing leases	818	495
Financing cash flows for financing leases	3,481	2,393
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases(1)	(1,590)	23,620
Finance leases	$ 11,694	$ 20