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Note 6 - Loans and the Allowance for Credit Losses - Amortized Cost of of the Modified Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Modified	$ 70,295	$ 211	$ 82,988	$ 255
Modified, percentage	0.97%	0.00%	1.11%	0.00%
Extended Maturity [Member]
Modified	$ 6,491	$ 211	$ 19,058	$ 255
Payment Deferral [Member]
Modified	0	0	126	0
Contractual Interest Rate Reduction [Member]
Modified	63,804	0	63,804	0
Commercial Portfolio Segment [Member]
Modified	$ 6,491	$ 0	$ 17,767	$ 44
Modified, percentage	0.43%	0.00%	1.17%	0.00%
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Modified	$ 6,491	$ 0	$ 17,641	$ 44
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Modified	0	0	126	0
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Modified	0	0	0	0
Commercial Real Estate Portfolio Segment [Member]
Modified	$ 63,804	$ 211	$ 63,804	$ 211
Modified, percentage	1.11%	0.00%	1.11%	0.00%
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Modified	$ 0	$ 211	$ 0	$ 211
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Modified	0		0	0
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Modified	$ 63,804		63,804	$ 0
Residential Portfolio Segment [Member]
Modified			$ 1,417
Modified, percentage			0.57%
Residential Portfolio Segment [Member] | Extended Maturity [Member]
Modified			$ 1,417
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Modified			0
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Modified			$ 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
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

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- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
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-Section 50
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