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Note 5 - Loans and Allowance for Credit Losses - Loans (Details Textual) Pure in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Financing Receivable Number Of Loans 90 Days Past Due And Still Accruing |  | $ 0 | $ 0
Financing Receivable, Nonaccrual | [1] | 31,619 | 22,323
Financing Receivable, Nonaccrual, Interest Income |  | $ 0 | $ 0
Number Of Loans Identified As Troubled Debt Restructurings |  | 0 | 0
Financing Receivable, Modified, Commitment to Lend |  | $ 0 | $ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts |  | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Nonaccrual |  | $ 10,569 | $ 13,189
Commercial Real Estate Portfolio Segment [Member] | Office [Member] |  |  |
Financing Receivable, Nonaccrual |  | 8,800 |
Commercial Real Estate Portfolio Segment [Member] | Warehouse [Member] |  |  |
Financing Receivable, Nonaccrual |  | 1,400 |
Commercial Real Estate Portfolio Segment [Member] | Other [Member] |  |  |
Financing Receivable, Nonaccrual |  | $ 360,000,000 |
[1] | Included in total loans.

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- Definition Financing receivable number of loans 90 days past due and still accruing. + References No definition available. + Details
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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References No definition available. + Details
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- Definition Represents number of loans identified as troubled debt restructurings. + References No definition available. + Details
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- Definition Amount of interest income on financing receivable on nonaccrual status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 + Details
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- Definition Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
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- Definition Amount of commitment to lend additional funds to debtor experiencing financial difficulty for which creditor has modified terms of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 36 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-36 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 40 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481746/310-40-50-1 + Details
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