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Securities - Amortized Cost and Estimated Fair Value of Held-to-Maturity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Amortized Cost    
Held-to-maturity debt securities: $ 312,357 $ 312,344
Total held-to-maturity debt securities 312,357 312,344
Fair Value    
Due after five years through ten years 267,099 261,692
Total held-to-maturity debt securities $ 267,099 $ 261,692