INVESTMENT SECURITIES - Contractual maturities, Held to maturity (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Held to Maturity, Amortized Cost
Due in one year or less	$ 4
Due after one year through five years	42,211
Due after five years through ten years	29,695
Due after ten years	171,933
Total, Amortized Cost	243,843
Held to Maturity, Estimated Fair Value
Due in one year or less	4
Due after one year through five years	39,339
Due after five years through ten years	24,965
Due after ten years	145,906
Total, Estimated Fair Value	$ 210,214