v3.26.3
Investment Securities - Summary of Available-for-sale Securities with Unrealized Loss (Details)
$ in Thousands
Sep. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value $ 289,708 $ 71,109
Less than 12 months, unrealized loss $ 20,604 $ 888
Less than 12 months, Number of securities | security 151 30
12 months or more, fair value $ 497,333 $ 791,394
12 months or more, unrealized loss $ 109,744 $ 94,295
12 months or more, Number of securities | security 271 423
Total fair value $ 787,041 $ 862,503
Total unrealized loss 130,348 95,183
U.S. Treasury and government agencies    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 16,984 5,319
Less than 12 months, unrealized loss $ 727 $ 16
Less than 12 months, Number of securities | security 3 3
12 months or more, fair value $ 0 $ 741
12 months or more, unrealized loss $ 0 $ 3
12 months or more, Number of securities | security 0 4
Total fair value $ 16,984 $ 6,060
Total unrealized loss 727 19
U.S. government sponsored agencies    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 146,573 47,059
Less than 12 months, unrealized loss $ 12,481 $ 341
Less than 12 months, Number of securities | security 27 10
12 months or more, fair value $ 38,449 $ 127,311
12 months or more, unrealized loss $ 6,032 $ 6,115
12 months or more, Number of securities | security 13 27
Total fair value $ 185,022 $ 174,370
Total unrealized loss 18,513 6,456
States and political subdivisions    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 22,218 3,129
Less than 12 months, unrealized loss $ 2,793 $ 460
Less than 12 months, Number of securities | security 46 5
12 months or more, fair value $ 74,941 $ 158,898
12 months or more, unrealized loss $ 19,662 $ 17,942
12 months or more, Number of securities | security 60 134
Total fair value $ 97,159 $ 162,027
Total unrealized loss 22,455 18,402
Residential mortgage-backed securities    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 84,246 13,310
Less than 12 months, unrealized loss $ 2,760 $ 62
Less than 12 months, Number of securities | security 69 10
12 months or more, fair value $ 352,204 $ 461,661
12 months or more, unrealized loss $ 76,954 $ 63,941
12 months or more, Number of securities | security 181 235
Total fair value $ 436,450 $ 474,971
Total unrealized loss 79,714 64,003
Commercial mortgage-backed securities    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 19,687 2,292
Less than 12 months, unrealized loss $ 1,843 $ 9
Less than 12 months, Number of securities | security 6 2
12 months or more, fair value $ 28,885 $ 39,000
12 months or more, unrealized loss $ 6,950 $ 6,077
12 months or more, Number of securities | security 16 21
Total fair value $ 48,572 $ 41,292
Total unrealized loss 8,793 6,086
Bank-issued trust preferred securities    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 0 0
Less than 12 months, unrealized loss $ 0 $ 0
Less than 12 months, Number of securities | security 0 0
12 months or more, fair value $ 2,854 $ 3,783
12 months or more, unrealized loss $ 146 $ 217
12 months or more, Number of securities | security 1 2
Total fair value $ 2,854 $ 3,783
Total unrealized loss $ 146 $ 217