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Loans - Contractual Maturity Schedule by Major Category of Loans Excluding Fair Value Adjustments (Detail) $ in Thousands | Dec. 31, 2023 USD ($)
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Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | $ 2,586,216
Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 525,902
Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 224,416
Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 132,593
Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 1,337,919
Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 255,438
Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 79,806
Other Loan [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 30,142
Major Category Of Receivables Due Within One Year [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 287,725
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 | 12,307
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 | 546
Major Category Of Receivables Due Within One Year [Member] | Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 62,926
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 | 109,232
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 | 97,823
Major Category Of Receivables Due Within One Year [Member] | Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 2,036
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 | 2,855
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 | 632,515
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 | 33,817
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 | 6,149
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 | 47,053
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 | 382,123
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 | 103,806
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 | 58,115
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 | 1,452
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 | 947,627
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 | 157,139
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 | 63,073
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 | 19,184
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 | 619,438
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 | 52,981
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 | 19,561
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 | 16,251
Major Category Of Receivables After Fifteen Years [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 718,349
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 | 322,639
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 | 154,648
Major Category Of Receivables After Fifteen Years [Member] | Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 3,430
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 | 227,126
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 | 828
Major Category Of Receivables After Fifteen Years [Member] | Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | 94
Major Category Of Receivables After Fifteen Years [Member] | Other Loan [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans excluding fair value adjustments | $ 9,584

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