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INVESTMENT SECURITIES - Contractual maturities, Held to maturity (Details)
$ in Thousands
Mar. 31, 2022
USD ($)
Held to Maturity, Amortized Cost  
Due after one year through five years $ 24,344
Due after five years through ten years 39,407
Due after ten years 189,349
Total, Amortized Cost 253,100
Held to Maturity, Estimated Fair Value  
Due after one year through five years 23,559
Due after five years through ten years 36,305
Due after ten years 176,165
Total, Estimated Fair Value $ 236,029