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Note 21 - Qualified Affordable Housing Project Investments (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Amortization Method Qualified Affordable Housing Project Investments | $ 6,400,000 | $ 7,600,000 |
Qualified Affordable Housing Project Investments, Commitment | 2,300,000 | 2,600,000 |
Amortization Method Qualified Affordable Housing Project Investments, Amortization | 1,100,000 | 1,100,000 | $ 1,000,000
Affordable Housing Tax Credits and Other Tax Benefits, Amount | 1,000,000 | 991,000 | 1,000,000
Affordable Housing Project Investment, Write-down, Amount | $ 0 | $ 0 | $ 0
Minimum [Member] |  |  |
Affordable Housing Tax Credits Commitment, Year to be Paid | 2024 |  |
Maximum [Member] |  |  |
Affordable Housing Tax Credits Commitment, Year to be Paid | 2038 |  |

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- Definition Amount of write-down from impairment of an investment in a qualified affordable housing project. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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- Definition Year in which contingent commitments to qualified affordable housing project investments are expected to be paid, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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- Definition Amount of amortization expense of investment in qualified affordable housing projects. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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- Definition Amount of commitment or contingent commitments to qualified affordable housing project investments. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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