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Securities - Amortized Cost and Fair Value Securities Available for Sale and Held to Maturity Contractual Maturities (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Debt securities, available-for-sale, amortized cost, maturing within one year $ 9,213  
Debt securities, available-for-sale, amortized cost, maturing after one year but within five years 150,302  
Debt securities, available-for-sale, amortized cost, maturing after five years but within ten years 73,062  
Debt securities, available-for-sale, amortized cost, maturing after ten years 200,646  
Total securities available-for-sale, amortized cost 433,223  
Debt securities, available-for-sale, U.S. agency residential mortgage-backed, without single maturity date, amortized cost basis 92,717  
Debt securities, available-for-sale, government agency, commercial mortgage backed, without single maturity date, amortized cost basis 13,891  
Debt securities, available-for-sale, private label mortgage backed, without single maturity date, amortized cost basis 95,160  
Debt securities, available-for-sale, other asset backed, without single maturity date, amortized cost basis 138,036  
Total securities available-for-sale, amortized cost 773,027 $ 866,363
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]    
Debt securities, available-for-sale, fair value, maturing within one year 9,105  
Debt securities, available-for-sale, fair value, maturing after one year but within five years 134,803  
Debt securities, available-for-sale, fair value, maturing after five years but within ten years 61,767  
Debt securities, available-for-sale, fair value, maturing after ten years 164,177  
Total securities available-for-sale, fair value 369,852  
Debt securities, available-for-sale, U.S. agency residential mortgage-backed, without single maturity date, fair value 80,682  
Debt securities, available-for-sale, government agency commercial mortgage backed, without single maturity date, fair value 12,157  
Debt securities, available-for-sale, private label mortgage-backed, without single maturity date, fair value 86,662  
Debt securities, available-for-sale, other asset backed, without single maturity date, fair value 135,288  
Total securities available-for-sale, fair value 684,641 779,347
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract]    
Debt securities, held-to-maturity, amortized cost, maturing within one year 5,202  
Debt securities, held-to-maturity, amortized cost, maturing after five years but within ten years 53,499  
Debt securities, held-to-maturity, amortized cost, maturing after five years but within ten years 102,566  
Debt securities, held-to-maturity, amortized cost, maturing after ten years 84,997  
Total securities held-to-maturity, amortized cost 246,264  
Debt securities, held-to-maturity, U.S. agency residential mortgage-backed, without single maturity date, amortized cost 120,855  
Debt securities, held-to-maturity, U.S. agency commercial mortgage-backed, without single maturity date, amortized cost 4,713  
Debt securities, held-to-maturity, private label mortgage-backed, without single maturity date, amortized cost 7,621  
Debt securities, held-to-maturity, other asset backed, without single maturity date, amortized cost 0  
Total securities held-to-maturity, amortized cost 379,453 398,052
Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract]    
Debt securities, held-to-maturity, fair value, maturing within one year 5,164  
Debt securities, held-to-maturity, fair value, maturing after one year but within five years 47,992  
Debt securities, held-to-maturity, fair value, maturing after five years but within ten years 84,807  
Debt securities, held-to-maturity, fair value, maturing after ten years 68,255  
Total securities held-to-maturity, fair value 206,218  
Debt securities, held-to-maturity, U.S. agency residential mortgage-backed, without single maturity date, fair value 92,165  
Debt securities, held-to-maturity, U.S. agency commercial mortgage-backed, without single maturity date, fair value 4,153  
Debt securities, held-to-maturity, private label mortgage-backed, without single maturity date, fair value 6,663  
Debt securities, held-to-maturity, other asset backed, without single maturity date, fair value 0  
Total securities held-to-maturity, fair value $ 309,199 $ 335,418