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Securities - Unrealized Loss Positions (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security 27 45
12 months or more in an unrealized loss position | security 307 317
Total | security 334 362
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position $ 678 $ 1,010
12 months or more in an unrealized loss position 50,824 69,769
Total 51,502 70,779
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position 108,776 183,156
12 months or more in an unrealized loss position 555,129 667,783
Total $ 663,905 850,939
Effective duration (in years) 3 years  
Credit losses were determined $ 0 $ 0
U.S. Treasury    
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security   4
12 months or more in an unrealized loss position | security   1
Total | security   5
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position   $ 72
12 months or more in an unrealized loss position   387
Total   459
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position   49,788
12 months or more in an unrealized loss position   49,547
Total   $ 99,335
U.S. government agencies    
Securities Available-for-Sale, Number of Securities    
12 months or more in an unrealized loss position | security 8 8
Total | security 8 8
Securities Available-for-Sale, Unrealized Losses    
12 months or more in an unrealized loss position $ 452 $ 1,388
Total 452 1,388
Securities Available-for-Sale, Fair Value    
12 months or more in an unrealized loss position 38,264 37,814
Total $ 38,264 $ 37,814
U.S. government agencies mortgage-backed    
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security 1 1
12 months or more in an unrealized loss position | security 128 128
Total | security 129 129
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position $ 40 $ 447
12 months or more in an unrealized loss position 7,866 11,517
Total 7,906 11,964
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position 10,603 10,296
12 months or more in an unrealized loss position 82,448 89,981
Total $ 93,051 $ 100,277
States and political subdivisions    
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security 11 31
12 months or more in an unrealized loss position | security 29 27
Total | security 40 58
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position $ 407 $ 455
12 months or more in an unrealized loss position 8,103 11,322
Total 8,510 11,777
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position 28,365 85,457
12 months or more in an unrealized loss position 112,046 111,308
Total $ 140,411 $ 196,765
Collateralized mortgage obligations    
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security 2 3
12 months or more in an unrealized loss position | security 135 139
Total | security 137 142
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position $ 7 $ 24
12 months or more in an unrealized loss position 33,207 43,177
Total 33,214 43,201
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position 3,720 5,107
12 months or more in an unrealized loss position 301,071 328,708
Total $ 304,791 $ 333,815
Asset-backed securities    
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security 6 2
12 months or more in an unrealized loss position | security 7 13
Total | security 13 15
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position $ 158 $ 4
12 months or more in an unrealized loss position 1,196 1,977
Total 1,354 1,981
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position 15,163 1,068
12 months or more in an unrealized loss position 21,300 50,198
Total $ 36,463 $ 51,266
Collateralized loan obligations    
Securities Available-for-Sale, Number of Securities    
Less than 12 months in an unrealized loss position | security 7 4
12 months or more in an unrealized loss position | security   1
Total | security 7 5
Securities Available-for-Sale, Unrealized Losses    
Less than 12 months in an unrealized loss position $ 66 $ 8
12 months or more in an unrealized loss position   1
Total 66 9
Securities Available-for-Sale, Fair Value    
Less than 12 months in an unrealized loss position 50,925 31,440
12 months or more in an unrealized loss position   227
Total $ 50,925 $ 31,667