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Securities - Schedule of Available-for-Sales Securities Amortized Cost and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Amortized Cost    
Total $ 582,411 $ 679,203
Mortgage-backed securities 827,994 869,279
Amortized Cost 1,410,405 1,548,482
Fair Value    
Total 564,226 650,580
Mortgage-backed securities 745,053 766,070
Fair Value 1,309,279 1,416,650
Available-for-sale securities    
Amortized Cost    
Due in one year or less 109,842 99,242
Due after one year through five years 226,448 307,093
Due after five years through ten years 223,794 245,617
Due after ten years 22,327 27,251
Fair Value    
Due in one year or less 108,632 98,650
Due after one year through five years 219,556 296,279
Due after five years through ten years 217,790 233,569
Due after ten years $ 18,248 $ 22,082