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Note 9 - Commitments and Off-balance Sheet Risk - Exposure to Credit Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Contractual amounts of financial instruments with off-balance sheet risk | $ 2,221,032 | $ 2,101,302
Standby Letters of Credit [Member] |  |
Contractual amounts of financial instruments with off-balance sheet risk | 26,334 | 26,491
Unused lines of Credit [Member] | Commercial Portfolio Segment [Member] |  |
Contractual amounts of financial instruments with off-balance sheet risk | 1,551,843 | 1,488,782
Unused lines of Credit [Member] | One to Four Family Mortgages [Member] |  |
Contractual amounts of financial instruments with off-balance sheet risk | 98,313 | 84,298
Unused lines of Credit [Member] | Credit Card Lines of Credit [Member] |  |
Contractual amounts of financial instruments with off-balance sheet risk | 196,191 | 172,273
Unused lines of Credit [Member] | Consumer Other Financing Receivable 1 [Member] |  |
Contractual amounts of financial instruments with off-balance sheet risk | 40,892 | 33,892
Loan Origination Commitments [Member] |  |
Contractual amounts of financial instruments with off-balance sheet risk | $ 307,459 | $ 295,566

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- Definition The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
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