LEASES - Schedule of Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lease Cost
Operating lease cost	$ 3,105	$ 3,181	$ 3,917
Amortization of ROU asset	210	0
Interest on lease liabilities	137	0
Total finance lease	347	0
Total lease cost	3,452	3,181
ROU assets obtained in exchange for new operating lease liabilities, net of ROU asset disposals
Operating cash flows from operating leases	2,864	3,216
Operating cash flows from finance leases	137	0
Principal payments on finance lease	151	0	$ 0
Cash flows from operating and finance leases	3,152	3,216
ROU assets obtained in exchange for new operating lease liabilities, net of ROU asset disposals	1,042	10,173
ROU assets obtained in exchange for new finance lease liabilities, net of ROU asset disposals	$ 2,782	$ 0
Weighted-average remaining lease term - operating leases	4 years 1 month 24 days	4 years 11 months 4 days
Weighted-average remaining lease term - finance leases	12 years 3 months
Weighted-average discount rate - operating leases	4.50%	4.60%
Weighted-average discount rate - finance leases	5.10%