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Loans - Risk Category of Loans by Class (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Total | $ 5,787,622 |  | $ 5,787,622 |  | $ 4,133,267
Current Period Gross Charge-Offs |  |  |  |  |
Total | 1,126 | $ 619 | 2,772 | $ 2,279 |
Commercial and Industrial Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 98,354 |  | 98,354 |  | 118,292
Year two | 113,736 |  | 113,736 |  | 88,748
Year three | 74,575 |  | 74,575 |  | 94,374
Year four | 91,408 |  | 91,408 |  | 68,523
Year five | 62,378 |  | 62,378 |  | 19,250
Prior | 62,951 |  | 62,951 |  | 54,844
Revolving Loans Amortized Cost Basis | 226,732 |  | 226,732 |  | 147,754
Total | 730,134 |  | 730,134 |  | 591,785
Current Period Gross Charge-Offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 306 |  | 4
Year three |  |  | 0 |  | 96
Year four |  |  | 138 |  | 64
Year five |  |  | 0 |  | 0
Prior |  |  | 77 |  | 13
Revolving Loans Amortized Cost Basis |  |  | 236 |  | 46
Total | 384 | 92 | 757 | 223 | 223
Commercial and Industrial Loans | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 96,905 |  | 96,905 |  | 118,037
Year two | 111,892 |  | 111,892 |  | 86,412
Year three | 69,327 |  | 69,327 |  | 93,406
Year four | 84,451 |  | 84,451 |  | 64,298
Year five | 57,193 |  | 57,193 |  | 17,140
Prior | 50,489 |  | 50,489 |  | 49,181
Revolving Loans Amortized Cost Basis | 212,548 |  | 212,548 |  | 143,096
Total | 682,805 |  | 682,805 |  | 571,570
Commercial and Industrial Loans | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 1,349 |  | 1,349 |  | 147
Year two | 980 |  | 980 |  | 1,709
Year three | 2,136 |  | 2,136 |  | 787
Year four | 1,292 |  | 1,292 |  | 1,061
Year five | 649 |  | 649 |  | 1,202
Prior | 2,582 |  | 2,582 |  | 2,044
Revolving Loans Amortized Cost Basis | 7,258 |  | 7,258 |  | 1,023
Total | 16,246 |  | 16,246 |  | 7,973
Commercial and Industrial Loans | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 100 |  | 100 |  | 108
Year two | 864 |  | 864 |  | 627
Year three | 3,112 |  | 3,112 |  | 181
Year four | 5,665 |  | 5,665 |  | 3,164
Year five | 4,536 |  | 4,536 |  | 908
Prior | 9,880 |  | 9,880 |  | 3,619
Revolving Loans Amortized Cost Basis | 6,926 |  | 6,926 |  | 3,635
Total | 31,083 |  | 31,083 |  | 12,242
Commercial and Industrial Loans | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Commercial Real Estate Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 307,437 |  | 307,437 |  | 327,921
Year two | 431,025 |  | 431,025 |  | 329,595
Year three | 413,246 |  | 413,246 |  | 412,441
Year four | 543,301 |  | 543,301 |  | 405,248
Year five | 474,092 |  | 474,092 |  | 189,824
Prior | 873,335 |  | 873,335 |  | 520,372
Revolving Loans Amortized Cost Basis | 60,745 |  | 60,745 |  | 39,471
Total | 3,103,181 |  | 3,103,181 |  | 2,224,872
Current Period Gross Charge-Offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 0
Prior |  |  | 26 |  | 308
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 0
Total | 0 | 0 | 26 | 308 | 308
Commercial Real Estate Loans | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 306,962 |  | 306,962 |  | 327,488
Year two | 428,190 |  | 428,190 |  | 315,981
Year three | 395,842 |  | 395,842 |  | 410,135
Year four | 534,455 |  | 534,455 |  | 394,698
Year five | 451,968 |  | 451,968 |  | 187,849
Prior | 804,623 |  | 804,623 |  | 502,263
Revolving Loans Amortized Cost Basis | 60,613 |  | 60,613 |  | 39,271
Total | 2,982,653 |  | 2,982,653 |  | 2,177,685
Commercial Real Estate Loans | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 401 |  | 401 |  | 433
Year two | 2,835 |  | 2,835 |  | 13,433
Year three | 16,711 |  | 16,711 |  | 1,740
Year four | 5,681 |  | 5,681 |  | 5,395
Year five | 15,304 |  | 15,304 |  | 1,975
Prior | 39,417 |  | 39,417 |  | 12,349
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 200
Total | 80,349 |  | 80,349 |  | 35,525
Commercial Real Estate Loans | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 74 |  | 74 |  | 0
Year two | 0 |  | 0 |  | 181
Year three | 693 |  | 693 |  | 566
Year four | 3,165 |  | 3,165 |  | 5,155
Year five | 6,820 |  | 6,820 |  | 0
Prior | 29,295 |  | 29,295 |  | 5,760
Revolving Loans Amortized Cost Basis | 132 |  | 132 |  | 0
Total | 40,179 |  | 40,179 |  | 11,662
Commercial Real Estate Loans | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Agricultural Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 42,901 |  | 42,901 |  | 47,901
Year two | 40,442 |  | 40,442 |  | 36,805
Year three | 37,806 |  | 37,806 |  | 48,251
Year four | 49,630 |  | 49,630 |  | 34,488
Year five | 33,385 |  | 33,385 |  | 40,801
Prior | 149,586 |  | 149,586 |  | 118,475
Revolving Loans Amortized Cost Basis | 119,057 |  | 119,057 |  | 104,316
Total | 472,807 |  | 472,807 |  | 431,037
Current Period Gross Charge-Offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 0
Prior |  |  | 0 |  | 8
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 0
Total | 0 | 7 | 0 | 8 | 8
Agricultural Loans | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 39,779 |  | 39,779 |  | 47,179
Year two | 37,640 |  | 37,640 |  | 35,379
Year three | 34,027 |  | 34,027 |  | 48,105
Year four | 47,469 |  | 47,469 |  | 33,666
Year five | 30,116 |  | 30,116 |  | 35,726
Prior | 132,789 |  | 132,789 |  | 103,702
Revolving Loans Amortized Cost Basis | 106,705 |  | 106,705 |  | 102,251
Total | 428,525 |  | 428,525 |  | 406,008
Agricultural Loans | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 3,122 |  | 3,122 |  | 547
Year two | 2,433 |  | 2,433 |  | 1,426
Year three | 2,936 |  | 2,936 |  | 146
Year four | 2,097 |  | 2,097 |  | 822
Year five | 3,169 |  | 3,169 |  | 5,075
Prior | 11,800 |  | 11,800 |  | 10,676
Revolving Loans Amortized Cost Basis | 11,300 |  | 11,300 |  | 2,065
Total | 36,857 |  | 36,857 |  | 20,757
Agricultural Loans | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 175
Year two | 369 |  | 369 |  | 0
Year three | 843 |  | 843 |  | 0
Year four | 64 |  | 64 |  | 0
Year five | 100 |  | 100 |  | 0
Prior | 4,997 |  | 4,997 |  | 4,097
Revolving Loans Amortized Cost Basis | 1,052 |  | 1,052 |  | 0
Total | 7,425 |  | 7,425 |  | 4,272
Agricultural Loans | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Leases |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 24,923 |  | 24,923 |  | 32,214
Year two | 26,462 |  | 26,462 |  | 26,392
Year three | 21,492 |  | 21,492 |  | 8,272
Year four | 5,132 |  | 5,132 |  | 6,578
Year five | 3,029 |  | 3,029 |  | 2,128
Prior | 4,050 |  | 4,050 |  | 3,669
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 85,088 |  | 85,088 |  | 79,253
Current Period Gross Charge-Offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 0
Prior |  |  | 0 |  | 0
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 0
Total | 0 | $ 0 | 0 | $ 0 | 0
Leases | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 24,923 |  | 24,923 |  | 32,214
Year two | 26,462 |  | 26,462 |  | 26,392
Year three | 21,492 |  | 21,492 |  | 8,272
Year four | 5,132 |  | 5,132 |  | 6,578
Year five | 3,029 |  | 3,029 |  | 2,128
Prior | 4,050 |  | 4,050 |  | 3,669
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 85,088 |  | 85,088 |  | 79,253
Leases | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Leases | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Leases | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | $ 0 |  | $ 0 |  | $ 0

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