v3.26.1
Securities - AFS in an Unrealized Loss Position (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
item
Jun. 30, 2026
USD ($)
item
Dec. 31, 2025
USD ($)
item
Number of Securities      
Unrealized loss for less than twelve months | item 32 32 8
Unrealized loss for twelve months or longer | item 309 309 318
Total | item 341 341 326
Fair Value      
Unrealized loss for less than twelve months $ 257,525 $ 257,525 $ 52,812
Unrealized loss for twelve months or longer 1,005,064 1,005,064 1,079,848
Total 1,262,589 1,262,589 1,132,660
Unrealized Loss      
Unrealized loss for less than twelve months 3,027 3,027 978
Unrealized loss for twelve months or longer 67,295 67,295 66,160
Total 70,322 70,322 $ 67,138
Unrealized losses $ 100 $ 100  
U.S. Treasury securities      
Number of Securities      
Unrealized loss for twelve months or longer | item     1
Total | item     1
Fair Value      
Unrealized loss for twelve months or longer     $ 4,943
Total     4,943
Unrealized Loss      
Unrealized loss for twelve months or longer     55
Total     $ 55
Bonds      
Number of Securities      
Unrealized loss for less than twelve months | item 4 4 2
Unrealized loss for twelve months or longer | item 13 13 13
Total | item 17 17 15
Fair Value      
Unrealized loss for less than twelve months $ 32,515 $ 32,515 $ 2,811
Unrealized loss for twelve months or longer 36,462 36,462 41,004
Total 68,977 68,977 43,815
Unrealized Loss      
Unrealized loss for less than twelve months 126 126 6
Unrealized loss for twelve months or longer 341 341 343
Total $ 467 $ 467 $ 349
Residential mortgage-backed securities      
Number of Securities      
Unrealized loss for less than twelve months | item 6 6 1
Unrealized loss for twelve months or longer | item 116 116 117
Total | item 122 122 118
Fair Value      
Unrealized loss for less than twelve months $ 49,892 $ 49,892 $ 11,390
Unrealized loss for twelve months or longer 225,540 225,540 251,643
Total 275,432 275,432 263,033
Unrealized Loss      
Unrealized loss for less than twelve months 453 453 46
Unrealized loss for twelve months or longer 23,337 23,337 22,018
Total $ 23,790 $ 23,790 $ 22,064
Commercial mortgage-backed securities      
Number of Securities      
Unrealized loss for less than twelve months | item 6 6 1
Unrealized loss for twelve months or longer | item 18 18 18
Total | item 24 24 19
Fair Value      
Unrealized loss for less than twelve months $ 62,932 $ 62,932 $ 9,893
Unrealized loss for twelve months or longer 199,857 199,857 198,985
Total 262,789 262,789 208,878
Unrealized Loss      
Unrealized loss for less than twelve months 433 433 43
Unrealized loss for twelve months or longer 3,176 3,176 4,339
Total $ 3,609 $ 3,609 $ 4,382
Collateralized mortgage obligations      
Number of Securities      
Unrealized loss for less than twelve months | item 14 14 3
Unrealized loss for twelve months or longer | item 123 123 128
Total | item 137 137 131
Fair Value      
Unrealized loss for less than twelve months $ 104,805 $ 104,805 $ 21,597
Unrealized loss for twelve months or longer 511,085 511,085 550,788
Total 615,890 615,890 572,385
Unrealized Loss      
Unrealized loss for less than twelve months 1,104 1,104 54
Unrealized loss for twelve months or longer 37,837 37,837 36,539
Total $ 38,941 $ 38,941 $ 36,593
Corporate debt securities      
Number of Securities      
Unrealized loss for less than twelve months | item 1 1 1
Unrealized loss for twelve months or longer | item 1 1 1
Total | item 2 2 2
Fair Value      
Unrealized loss for less than twelve months $ 6,353 $ 6,353 $ 7,121
Unrealized loss for twelve months or longer 9,761 9,761 9,743
Total 16,114 16,114 16,864
Unrealized Loss      
Unrealized loss for less than twelve months 910 910 829
Unrealized loss for twelve months or longer 225 225 475
Total 1,135 1,135 $ 1,304
Loss due to change in fair value $ 100 $ 100  
States and political subdivisions      
Number of Securities      
Unrealized loss for less than twelve months | item 1 1  
Unrealized loss for twelve months or longer | item 38 38 40
Total | item 39 39 40
Fair Value      
Unrealized loss for less than twelve months $ 1,028 $ 1,028  
Unrealized loss for twelve months or longer 22,359 22,359 $ 22,742
Total 23,387 23,387 22,742
Unrealized Loss      
Unrealized loss for less than twelve months 1 1  
Unrealized loss for twelve months or longer 2,379 2,379 2,391
Total $ 2,380 $ 2,380 $ 2,391