INVESTMENT SECURITIES - Contractual maturities, Held t o maturity (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Held to Maturity, Amortized Cost
Due in one year or less	$ 1
Due after one year through five years	13
Due after five years through ten years	17,725
Due after ten years	54,370
Total, Amortized Cost	72,109
Held to Maturity, Estimated Fair Value
Due in one year or less	1
Due after one year through five years	13
Due after five years through ten years	17,300
Due after ten years	53,393
Total, Estimated Fair Value	$ 70,707