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INVESTMENT SECURITIES - Maturity of Held-to-Maturity Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Amortized Cost    
Due in one year or less $ 100 $ 0
Due after one year through five years 500 450
Due after five years through ten years 0 150
Total securities with contractual maturities 600 600
Mortgage-backed securities 91,736 95,779
Amortized Cost 92,336 96,379
Estimated Fair Value    
Due in one year or less 99 0
Due after one year through five years 453 415
Due after five years through ten years 0 131
Total securities with contractual maturities 552 546
Mortgage-backed securities 68,200 76,233
Total held to maturity securities $ 68,752 $ 76,779