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Loans - Contractual Maturity Schedule by Major Category of Loans Excluding Fair Value Adjustments (Detail) $ in Thousands | Dec. 31, 2024 USD ($)
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Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | $ 2,565,480
Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 522,214
Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 216,599
Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 152,102
Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 1,310,861
Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 275,519
Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 63,203
Other Loan [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 24,982
Major Category Of Receivables Due Within One Year [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 376,306
Major Category Of Receivables Due Within One Year [Member] | Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 19,180
Major Category Of Receivables Due Within One Year [Member] | Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 6,490
Major Category Of Receivables Due Within One Year [Member] | Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 82,568
Major Category Of Receivables Due Within One Year [Member] | Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 138,177
Major Category Of Receivables Due Within One Year [Member] | Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 127,540
Major Category Of Receivables Due Within One Year [Member] | Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 2,274
Major Category Of Receivables Due Within One Year [Member] | Other Loan [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 77
Major Category Of Receivables Due Within One Year to Five Years [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 628,728
Major Category Of Receivables Due Within One Year to Five Years [Member] | Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 25,777
Major Category Of Receivables Due Within One Year to Five Years [Member] | Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 7,715
Major Category Of Receivables Due Within One Year to Five Years [Member] | Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 55,905
Major Category Of Receivables Due Within One Year to Five Years [Member] | Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 403,661
Major Category Of Receivables Due Within One Year to Five Years [Member] | Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 83,964
Major Category Of Receivables Due Within One Year to Five Years [Member] | Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 50,750
Major Category Of Receivables Due Within One Year to Five Years [Member] | Other Loan [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 956
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 894,286
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 156,930
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 65,320
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 8,888
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 565,194
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 63,867
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 10,138
Major Category Of Receivables Due After Five Years Within Fifteen Years [Member] | Other Loan [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 23,949
Major Category Of Receivables After Fifteen Years [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 666,160
Major Category Of Receivables After Fifteen Years [Member] | Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 320,327
Major Category Of Receivables After Fifteen Years [Member] | Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 137,074
Major Category Of Receivables After Fifteen Years [Member] | Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 4,741
Major Category Of Receivables After Fifteen Years [Member] | Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 203,829
Major Category Of Receivables After Fifteen Years [Member] | Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 148
Major Category Of Receivables After Fifteen Years [Member] | Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | $ 41

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