LEASES - Lease liabilities and ROU assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Leases [Abstract]
Right-of-use assets	$ 24,811	$ 25,457	$ 25,457
Lease liabilities	$ 26,083	$ 26,696	$ 26,696
Weighted average remaining lease terms on operating leases (in years)	12 years		12 years 2 months 12 days
Weighted average discount rate on operating leases	1.98%		1.97%