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Loans - Distribution of Fixed Rate Loans and Variable Rate Loans by Major Loan Category (Detail) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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Consumer Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | $ 331,050 | $ 329,142
Distribution of variable rate loans by major loan category, Variable Rate | 194,128 | 192,753
Agricultural Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | 132,725 | 123,783
Distribution of variable rate loans by major loan category, Variable Rate | 94,730 | 100,008
Agricultural [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | 52,536 | 56,269
Distribution of variable rate loans by major loan category, Variable Rate | 75,134 | 76,291
Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | 989,520 | 1,024,989
Distribution of variable rate loans by major loan category, Variable Rate | 314,880 | 312,777
Commercial and Industrial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | 133,140 | 131,385
Distribution of variable rate loans by major loan category, Variable Rate | 122,911 | 123,550
Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | 74,757 | 79,526
Distribution of variable rate loans by major loan category, Variable Rate | 62 | 65
Other Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Distribution of fixed rate loans by major loan category, Fixed Rate | 17,294 | 20,552
Distribution of variable rate loans by major loan category, Variable Rate | $ 9,482 | $ 9,584

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- Definition Amount of loan with fixed rate of interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 + Details
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- Definition Amount of loan with variable or adjustable rate of interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 + Details
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