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Note 5 - Loans and Allowance for Credit Losses - Loans (Details Textual) Pure in Thousands, $ in Thousands		12 Months Ended
		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.

X

- Definition

Financing receivable number of loans 90 days past due and still accruing.

+ References

No definition available.

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X

- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

No definition available.

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X

- Definition

Represents number of loans identified as troubled debt restructurings.

+ References

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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

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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

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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

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