Note 2 - Investments, Available for Sale - Available for Sale Securities Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Due in one year or less	$ 5
Due in one year or less	5
Due after one year to five years	7,646
Due after one year to five years	7,664
Due after five to ten years	73,665
Due after five to ten years	69,452
Due after ten years or more	134,890
Due after ten years or more	124,349
Amortized cost, AFS	584,287	$ 604,157
Debt Securities, Available-for-Sale	537,640	550,148
Total AFS Securities	584,287	604,157
Collateralized Mortgage-Backed Securities [Member]
Amortized cost, AFS	368,081	353,222
Debt Securities, Available-for-Sale	336,170	319,280
Total AFS Securities	$ 368,081	$ 353,222

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
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-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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