v3.26.3
Investment Securities - Summary of Held-to-maturity Securities with Unrealized Loss (Details)
$ in Thousands
Sep. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value $ 364,284 $ 175,761
Less than 12 months, unrealized loss $ 25,131 $ 2,120
Less than 12 months, no. of securities | security 97 27
12 months or more, fair value $ 393,104 $ 394,083
12 months or more, unrealized loss $ 86,592 $ 58,736
12 months or more, no. of securities | security 158 160
Total fair value $ 757,388 $ 569,844
Total unrealized loss 111,723 60,856
U.S. government sponsored agencies    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 128,400 131,933
Less than 12 months, unrealized loss $ 9,811 $ 1,447
Less than 12 months, no. of securities | security 31 16
12 months or more, fair value $ 106,121 $ 66,509
12 months or more, unrealized loss $ 15,049 $ 6,684
12 months or more, no. of securities | security 21 20
Total fair value $ 234,521 $ 198,442
Total unrealized loss 24,860 8,131
States and political subdivisions    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 974 1,238
Less than 12 months, unrealized loss $ 317 $ 301
Less than 12 months, no. of securities | security 2 2
12 months or more, fair value $ 101,155 $ 110,531
12 months or more, unrealized loss $ 33,712 $ 24,726
12 months or more, no. of securities | security 66 65
Total fair value $ 102,129 $ 111,769
Total unrealized loss 34,029 25,027
Residential mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 219,697 34,814
Less than 12 months, unrealized loss $ 12,811 $ 261
Less than 12 months, no. of securities | security 57 6
12 months or more, fair value $ 121,450 $ 143,068
12 months or more, unrealized loss $ 22,550 $ 15,160
12 months or more, no. of securities | security 42 45
Total fair value $ 341,147 $ 177,882
Total unrealized loss 35,361 15,421
Commercial mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 15,213 7,776
Less than 12 months, unrealized loss $ 2,192 $ 111
Less than 12 months, no. of securities | security 7 3
12 months or more, fair value $ 64,378 $ 73,975
12 months or more, unrealized loss $ 15,281 $ 12,166
12 months or more, no. of securities | security 29 30
Total fair value $ 79,591 $ 81,751
Total unrealized loss $ 17,473 $ 12,277