LEASES - Supplemental cash information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
LEASES
Operating cash flows for operating leases	$ 8,111	$ 8,325	$ 8,701
Operating cash flows for finance leases	1,106	1,356	1,993
Financing cash flows for finance leases	6,365	9,020	12,519
Right-of-use assets obtained in exchange for new lease liabilities: Operating leases	5,673	6,842	2,269
Right-of-use assets obtained in exchange for new lease liabilities: Finance leases	$ 13,888	$ 2,534	$ 6,227