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Note 15 - Accumulated Other Comprehensive Income - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Loss recognized |  |  |  |  |  |  |  |  | $ 21 | $ 0 | $ 0
Income before income taxes | $ 14,716 | $ 18,947 | $ 12,871 | $ 15,440 | $ 15,659 | $ 17,462 | $ 14,636 | $ 12,400 | 61,974 | 60,157 | 66,528
Income tax benefit | 2,932 | 4,307 | 3,057 | 3,658 | 3,076 | 4,111 | 3,423 | 2,885 | 13,954 | 13,495 | 15,360
Net income | $ 11,784 | $ 14,640 | $ 9,814 | $ 11,782 | $ 12,583 | $ 13,351 | $ 11,213 | $ 9,515 | 48,020 | 46,662 | 51,168
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |
Income tax benefit |  |  |  |  |  |  |  |  | (5) | 0 | 0
Net income |  |  |  |  |  |  |  |  | 47 | 106 | 308
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 21 | 0 | 0
Income tax benefit |  |  |  |  |  |  |  |  | (7) | (29) | (80)
Net income |  |  |  |  |  |  |  |  | 16 | 0 | 0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Other operating expense |  |  |  |  |  |  |  |  | 0 | 0 | 124
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Other operating expense |  |  |  |  |  |  |  |  | 38 | 135 | 264
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 38 | 135 | 388
Net income |  |  |  |  |  |  |  |  | $ 31 | $ 106 | $ 308

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