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Note 4 - Loans and Allowance for Credit Losses - Loans - Modified by Class of Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)
Modified loans, balance	$ 54,383
Payment Deferral [Member]
Modified loans, balance	6,616
Extended Maturity [Member]
Modified loans, balance	35,839
Extended Maturity and Interest Rate Reduction [Member]
Modified loans, balance	11,928
Construction And Land Development Loans [Member]
Modified loans, balance	$ 47,545
Modified loans, percentage of total class of loans	27.40%
Modified loans, percentage of total class of loans (Year)	4 months 28 days
Modified loans, weighted average rate reduction	0.12%
Construction And Land Development Loans [Member] | Payment Deferral [Member]
Modified loans, balance	$ 0
Construction And Land Development Loans [Member] | Extended Maturity [Member]
Modified loans, balance	35,839
Construction And Land Development Loans [Member] | Extended Maturity and Interest Rate Reduction [Member]
Modified loans, balance	11,706
Commercial Real Estate Portfolio Segment [Member]
Modified loans, balance	$ 6,838
Modified loans, percentage of total class of loans	0.60%
Modified loans, percentage of total class of loans (Year)	1 year 9 months 29 days
Modified loans, weighted average rate reduction	0.00%
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Modified loans, balance	$ 6,616
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Modified loans, balance	0
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity and Interest Rate Reduction [Member]
Modified loans, balance	$ 222

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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X

- 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
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
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-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-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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X

- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ 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

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X

- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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

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