Note 1 - Business Description (Details Textual) $ in Thousands |
Jun. 30, 2026
USD ($)
|
Mar. 31, 2026
USD ($)
|
Dec. 31, 2025
USD ($)
|
Jun. 30, 2025
USD ($)
|
Mar. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
|---|---|---|---|---|---|---|
| Assets | $ 4,275,002 | $ 4,208,294 | ||||
| Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss | 3,300,000 | |||||
| Deposits | 3,390,641 | 3,350,398 | ||||
| Equity, Including Portion Attributable to Noncontrolling Interest | $ 535,177 | $ 531,054 | $ 523,410 | $ 517,653 | $ 510,306 | $ 507,877 |
| Number of Branches | 24 |
| X | ||||||||||
- Definition The number of branches operated during the period. No definition available.
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| X | ||||||||||
- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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