COMMITMENTS AND CONTINGENCIES - Maturities of Lease Liabilities and Minimum Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating Leases
2021	$ 2,302
2022	2,012
2023	1,767
2024	1,631
2025	1,571
Thereafter	10,947
Total lease payments	20,230
Less imputed interest	(4,605)
Total	15,625	$ 14,380
Finance Leases
2021	987
2022	987
2023	1,506
2024	940
2025	940
Thereafter	705
Total lease payments	6,065
Less imputed interest	(861)
Total	$ 5,204	$ 5,885