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Note 7 - Loans and Related Allowance for Credit Losses - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Modified, Amortized cost	$ 17,808	$ 21,817
to Total Financing Receivables, Percentage	1.20%	1.60%
Payment Deferral [Member]
Modified, Amortized cost	$ 0	$ 0
Extended Maturity [Member]
Modified, Amortized cost	15,301	19,310
Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	2,507	2,507
Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0	0
Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0	0
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member]
Modified, Amortized cost	$ 15,989	$ 2,652
to Total Financing Receivables, Percentage	1.10%	0.20%
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0	$ 0
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Extended Maturity [Member]
Modified, Amortized cost	13,482	145
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	2,507	2,507
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0	0
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0	0
Construction and Other [Member]
Modified, Amortized cost	$ 1,819
to Total Financing Receivables, Percentage	0.10%
Construction and Other [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0
Construction and Other [Member] | Extended Maturity [Member]
Modified, Amortized cost	1,819
Construction and Other [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	0
Construction and Other [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0
Construction and Other [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	$ 0
Residential Portfolio Segment [Member]
Modified, Amortized cost		$ 19,074
to Total Financing Receivables, Percentage		1.40%
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Modified, Amortized cost		$ 0
Residential Portfolio Segment [Member] | Extended Maturity [Member]
Modified, Amortized cost		19,074
Residential Portfolio Segment [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost		0
Residential Portfolio Segment [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost		0
Residential Portfolio Segment [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost		0
Commercial And Industrial [Member]
Modified, Amortized cost		$ 83
to Total Financing Receivables, Percentage		0.00%
Commercial And Industrial [Member] | Payment Deferral [Member]
Modified, Amortized cost		$ 0
Commercial And Industrial [Member] | Extended Maturity [Member]
Modified, Amortized cost		83
Commercial And Industrial [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost		0
Commercial And Industrial [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost		0
Commercial And Industrial [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost		0
Consumer Portfolio Segment [Member]
Modified, Amortized cost		$ 8
to Total Financing Receivables, Percentage		0.00%
Consumer Portfolio Segment [Member] | Payment Deferral [Member]
Modified, Amortized cost		$ 0
Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Modified, Amortized cost		8
Consumer Portfolio Segment [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost		0
Consumer Portfolio Segment [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost		0
Consumer Portfolio Segment [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost		$ 0

X

- Definition

Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
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