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Note 4 - Loans and the Allowance for Credit Losses - Loan Modifications (Details) - Extended Maturity [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Modified | $ 2,308 |  | $ 7,953 | $ 2,445
% of total segment financing receivables | 0.15% |  | 0.53% | 0.24%
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |  |  |
Modified | $ 2,232 | $ 2,357 | $ 7,105 | $ 2,413
% of total segment financing receivables | 1.45% | 1.93% | 4.60% | 1.98%
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Modified | $ 76 |  | $ 848 | $ 32
% of total segment financing receivables | 0.01% |  | 0.09% | 0.04%

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- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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- Definition Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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- Details
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- Details
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- Details
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