PREMISES AND EQUIPMENT - Lease Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Abstract]
Amortization of right-of-use assets, finance leases	$ 77
Interest on lease liabilities, finance leases	6
Operating lease cost	2,120
Short-term lease cost	72
Variable lease cost	38
Total lease cost	$ 2,313