LEASES - Leases Balance Sheets Location (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
LEASES
Operating lease right-of-use asset	$ 10,699	$ 11,341
Operating lease liability	$ 13,241	$ 13,970
Weighted-Average Remaining Lease Term - Operating leases	4 years 7 months 2 days	4 years 9 months 14 days
Weighted-Average Discount Rate - Operating leases	3.03%	3.04%