LEASES - Operating and finance leases liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating Leases	$ 19,008	$ 20,513
Finance Leases	1,761	823
Accrued liabilities
Lessee, Lease, Description [Line Items]
Operating Leases	2,976	3,171
Finance Leases	1,742	799
Other Liabilities
Lessee, Lease, Description [Line Items]
Operating Leases	16,032	17,342
Finance Leases	$ 19	$ 24