COMMITMENTS AND CONTINGENCIES - Maturities of Lease Liabilities and Minimum Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating Leases
2020	$ 1,951
2021	1,734
2022	1,578
2023	1,459
2024	1,318
Thereafter	10,205
Total lease payments	18,245
Less imputed interest	(3,865)
Total	14,380
Finance Leases
2020	986
2021	987
2022	987
2023	1,506
2024	940
Thereafter	1,645
Total lease payments	7,051
Less imputed interest	(1,166)
Total	$ 5,885
Previous Lease Accounting Standard, Minimum Lease Payments
2019		$ 1,771
2020		1,709
2021		1,485
2022		1,355
2023		1,261
Thereafter		10,538
Total		$ 18,119