PREMISES AND EQUIPMENT - Calculated Amount of Right of Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Operating leases liability	$ 8,452		$ 8,700
Statement of Financial Condition
Operating leases right of use asset	8,313	$ 8,446
Operating leases liability	8,452	8,539
Statement of Income
Operating lease costs classified as occupancy and equipment expense	374	385
Supplemental Cash Flow Information
Operating cash flows from operating leases	$ 361	$ 371