LEASES - Schedule of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lease Cost
Operating lease cost	$ 788	$ 702	$ 2,274	$ 2,179
Amortization of ROU asset	52	157	157	157
Interest on lease liabilities	32	104	98	104
Total finance lease	84	261	255	261
Total lease cost	872	963	2,529	2,440
Operating cash flows from operating leases
Operating cash flows from operating leases	761	710	2,249	2,193
Operating cash flows from finance leases	32	104	98	104
Financing cash flows from finance leases	40	112	118	112
Cash flows from operating and finance leases	833	926	2,465	2,409
Right-of-use assets obtained in exchange for new operating lease liabilities, net of right-of-use assets disposed	502	0	2,914	(98)
Right-of-use assets obtained in exchange for new finance lease liabilities, net of right-of-use assets disposed	$ 0	$ 2,782	$ 0	$ 2,782
Weighted-average remaining lease term - operating leases	4 years 3 months 25 days	5 years 1 month 9 days	4 years 3 months 25 days	5 years 1 month 9 days
Weighted-average remaining lease term - finance leases	11 years 8 months 1 day	12 years 6 months	11 years 8 months 1 day	12 years 6 months
Weighted-average discount rate - operating leases	3.70%	4.70%	3.70%	4.70%
Weighted-average discount rate - finance leases	5.10%	5.10%	5.10%	5.10%