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INVESTMENT SECURITIES - Maturity of Held-to-Maturity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Amortized Cost    
Due in one year or less $ 100 $ 100
Due after one year through five years 400 500
Due after five years through ten years 0 0
Total securities with contractual maturities 500 600
Mortgage-backed securities 89,442 90,629
Amortized Cost 89,942 91,229
Estimated Fair Value    
Due in one year or less 97 100
Due after one year through five years 369 465
Due after five years through ten years 0 0
Total securities with contractual maturities 466 565
Mortgage-backed securities 69,804 72,697
Total held to maturity securities $ 70,270 $ 73,262