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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Changes in CDI (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Amortization of intangible assets | $ 2,568 | $ 3,853 | $ 6,347
Core Deposits [Member] |  |  |
Balance, intangible | 10,459 | 9,730 | 9,730
Acquired from acquisitions | 0 | 729 | 0
Balance, intangible | 10,459 | 10,459 | 9,730
Balance, accumulated amortization | 6,741 | 5,655 | 4,534
Amortization of intangible assets | 923 | 1,086 | 1,121
Balance, accumulated amortization | 7,664 | 6,741 | 5,655
Total | $ 2,795 | $ 3,718 | $ 4,075

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