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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
(Dollars in thousands) |  | As of December 31, |
|  | 2022 |  |  | 2021 |
Unrealized gain (loss) on available-for-sale securities |  | $ | (89,041 | ) |  | $ | (3,261 | )
Unrealized gain (loss) on held to maturity securities |  |  | (3,053 | ) |  |  | — |
Unrealized gain (loss) on derivative instruments |  |  | 1,212 |  |  |  |  |
Tax effect |  |  | 19,085 |  |  |  | 685 |
Accumulated other comprehensive income (loss) |  | $ | (71,797 | ) |  | $ | (2,576 | )

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