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Investment Securities - Summary of Held-to-maturity Securities by Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]    
Debt securities, maturing within 1 year, amortized cost $ 9,063  
Debt securities, maturing 1 to 5 years, amortized cost 28,654  
Debt securities, maturing 5 to 10 years, amortized cost 127,697  
Debt securities, maturing over 10 years, amortized cost 536,808  
Amortized Cost 702,222 $ 683,895
Debt securities, maturing within 1 year, fair value 9,007  
Debt securities, maturing 1 to 5 years, fair value 27,167  
Debt securities, maturing 5 to 10 years, fair value 118,247  
Debt securities, maturing over 10 years, fair value 468,172  
Debt securities, held-to-maturity, fair value $ 622,593 612,022
Held-to-maturity securities, maturing within 1 year, weighted average yield 3.85%  
Held-to-maturity securities, maturing 1 to 5 years, weighted average yield 2.46%  
Held-to-maturity securities, maturing 6 to 10 years, weighted average yield 4.00%  
Held-to-maturity securities, maturing over 10 years, weighted average yield 3.66%  
Held-to-maturity securities, total weighted average yield 3.67%  
U.S. government sponsored agencies    
Schedule of Held-to-maturity Securities [Line Items]    
Debt securities, maturing within 1 year, amortized cost $ 8,000  
Debt securities, maturing 1 to 5 years, amortized cost 10,634  
Debt securities, maturing 5 to 10 years, amortized cost 70,081  
Debt securities, maturing over 10 years, amortized cost 123,308  
Amortized Cost 212,023 188,475
Debt securities, maturing within 1 year, fair value 7,950  
Debt securities, maturing 1 to 5 years, fair value 10,171  
Debt securities, maturing 5 to 10 years, fair value 69,459  
Debt securities, maturing over 10 years, fair value 115,557  
Debt securities, held-to-maturity, fair value 203,137 180,825
States and political subdivisions    
Schedule of Held-to-maturity Securities [Line Items]    
Debt securities, maturing within 1 year, amortized cost 0  
Debt securities, maturing 1 to 5 years, amortized cost 6,424  
Debt securities, maturing 5 to 10 years, amortized cost 16,631  
Debt securities, maturing over 10 years, amortized cost 121,079  
Amortized Cost 144,134 144,496
Debt securities, maturing within 1 year, fair value 0  
Debt securities, maturing 1 to 5 years, fair value 6,290  
Debt securities, maturing 5 to 10 years, fair value 13,874  
Debt securities, maturing over 10 years, fair value 91,918  
Debt securities, held-to-maturity, fair value 112,082 114,288
Residential mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Debt securities, maturing within 1 year, amortized cost 0  
Debt securities, maturing 1 to 5 years, amortized cost 360  
Debt securities, maturing 5 to 10 years, amortized cost 4,134  
Debt securities, maturing over 10 years, amortized cost 241,789  
Amortized Cost 246,283 248,559
Debt securities, maturing within 1 year, fair value 0  
Debt securities, maturing 1 to 5 years, fair value 353  
Debt securities, maturing 5 to 10 years, fair value 3,595  
Debt securities, maturing over 10 years, fair value 220,212  
Debt securities, held-to-maturity, fair value 224,160 231,620
Commercial mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Debt securities, maturing within 1 year, amortized cost 1,063  
Debt securities, maturing 1 to 5 years, amortized cost 11,236  
Debt securities, maturing 5 to 10 years, amortized cost 36,851  
Debt securities, maturing over 10 years, amortized cost 50,632  
Amortized Cost 99,782 102,365
Debt securities, maturing within 1 year, fair value 1,057  
Debt securities, maturing 1 to 5 years, fair value 10,353  
Debt securities, maturing 5 to 10 years, fair value 31,319  
Debt securities, maturing over 10 years, fair value 40,485  
Debt securities, held-to-maturity, fair value $ 83,214 $ 85,289