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Note 19 - Business Combinations - Acquisition of Conerstone Community Bancorp (Details Textual) |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 01, 2025 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jul. 02, 2025 USD ($)
Assets |  |  | $ 2,238,523,000 | $ 1,623,326,000 |  | $ 2,300,000,000
Goodwill |  |  | 24,215,000 | 5,502,000 |  |
Business Combination, Acquisition-Related Cost, Expense | $ 1,900,000 |  | $ 1,963,000 | $ 0 | $ 0 |
Cornerstone Community Bancorp [Member] |  |  |  |  |  |
Business Acquisition, Acquiree Share Conversion Ratio | 0.6608 |  |  |  |  |
Business Acquisition, Cash Paid to Prevent Fractional Shares (in dollars per share) | $ / shares | $ 9.75 |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares) | shares | 1,003,718 |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 16,100,000 |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Assumed in Period (in shares) | shares | 30,803 |  |  |  |  |
Business Combination, Consideration Transferred | $ 61,316,000 |  |  |  |  |
Business Combination, Consideration Transferred Value, Number of Trading Days | 20 |  |  |  |  |
Goodwill | $ 18,713,000 |  |  |  |  |
Business Combination, Acquisition-Related Cost, Expense |  | $ 6,400,000 |  |  |  |
Cornerstone Community Bancorp [Member] | Core Deposits [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |  |  |  |  |
Cornerstone Community Bancorp [Member] | Cornerstone Common Stock [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Assumed in Period (in shares) | shares | 35,000 |  |  |  |  |

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