PREMISES AND EQUIPMENT - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Depreciation, Depletion and Amortization [Abstract]
Depreciation and amortization included in occupancy and equipment expense	$ 519	$ 445	$ 1,500	$ 1,300