OPERATING LEASES - Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other information
Amortization of lease right-to-use asset	$ 1,517	$ 1,343
Accretion of lease liabilities	464	534
Cash paid for amounts included in the measurement of operating lease liabilities	$ 2,046	$ 1,895
Weighted-average discount rate	2.64%	3.54%
Weighted-average remaining lease term in years	10 years 9 months 18 days	11 years 2 months 12 days