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Investment Securities - Summary of Available-for-sale Investment Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Schedule of Available-for-sale Securities    
Amortized Cost $ 1,266,060 $ 1,184,288
Gross Unrealized Gains 1,883 3,240
Gross Unrealized Losses (148,804) (139,206)
Fair Value [1] 1,119,139 1,048,322
U.S. Treasury and government agencies    
Schedule of Available-for-sale Securities    
Amortized Cost 29,417 30,999
Gross Unrealized Gains 65 292
Gross Unrealized Losses (1,139) (995)
Fair Value 28,343 30,296
U.S. government sponsored agencies    
Schedule of Available-for-sale Securities    
Amortized Cost 241,060 128,500
Gross Unrealized Gains 548 639
Gross Unrealized Losses (10,692) (10,532)
Fair Value 230,916 118,607
States and political subdivisions    
Schedule of Available-for-sale Securities    
Amortized Cost 232,514 239,906
Gross Unrealized Gains 9 485
Gross Unrealized Losses (29,719) (27,095)
Fair Value 202,804 213,296
Residential mortgage-backed securities    
Schedule of Available-for-sale Securities    
Amortized Cost 696,929 717,772
Gross Unrealized Gains 1,257 1,819
Gross Unrealized Losses (97,184) (90,667)
Fair Value 601,002 628,924
Commercial mortgage-backed securities    
Schedule of Available-for-sale Securities    
Amortized Cost 59,640 60,611
Gross Unrealized Gains 1 5
Gross Unrealized Losses (9,606) (9,382)
Fair Value 50,035 51,234
Bank-issued trust preferred securities    
Schedule of Available-for-sale Securities    
Amortized Cost 6,500 6,500
Gross Unrealized Gains 3 0
Gross Unrealized Losses (464) (535)
Fair Value $ 6,039 $ 5,965
[1]     Available-for-sale investment securities and held-to-maturity investment securities are presented net of allowance for credit losses of $0 and $238, respectively, at June 30, 2024, and $0 and $238, respectively, at December 31, 2023.