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Note 7 - Components of Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - USD ($) $ in Thousands | 2 Months Ended | 3 Months Ended | 9 Months Ended
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Mar. 02, 2022 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2021
Unrealized holding gain (loss) on available for sale securities, tax | $ (23,431) |  |  |
Unrealized holding gain (loss) on available for sale securities, tax | $ (23,431) |  |  |
Reclassification adjustment for gain included in net income, taxes |  |  |  | $ (1)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |  |
Unrealized holding gain (loss) on available for sale securities, tax |  | $ (7,822) | $ (905) | (2,254)
Unrealized holding gain (loss) on available for sale securities, tax |  | (7,822) | (905) | (2,254)
AOCI Attributable to Parent [Member] |  |  |  |
Unrealized holding gain (loss) on available for sale securities, tax |  | (7,822) | (905) | (2,254)
Unrealized holding gain (loss) on available for sale securities, tax |  | $ (7,822) | $ (905) | $ (2,254)

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