DERIVATIVE INSTRUMENTS, Fair Values of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Values of Derivative Instruments
Derivative assets	$ 1,588	$ 851
Derivative liabilities	1,074	586
Interest Rate Swap Agreements | Designated As Hedging Instrument | Other Assets
Fair Values of Derivative Instruments
Derivative assets	498	265
Interest Rate Swap Agreements | Not Designated as Hedging Instrument | Other Assets
Fair Values of Derivative Instruments
Derivative assets	1,074	586
Interest Rate Swap Agreements | Not Designated as Hedging Instrument | Accrued Interest and Other Liabilities
Fair Values of Derivative Instruments
Derivative liabilities	1,074	$ 586
Commitments to Originate Real Estate Loans for Sale | Not Designated as Hedging Instrument | Other Assets
Fair Values of Derivative Instruments
Derivative assets	14
Forward Sales Commitments | Not Designated as Hedging Instrument | Other Assets
Fair Values of Derivative Instruments
Derivative assets	$ 2