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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, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
(Losses) gains recognized |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 385
Income before income taxes | $ 15,659 | $ 17,462 | $ 14,636 | $ 12,400 | $ 13,592 | $ 16,424 | $ 17,480 | $ 19,032 | 60,157 | 66,528 | 46,112
Income tax benefit | 3,076 | 4,111 | 3,423 | 2,885 | 3,037 | 3,816 | 4,077 | 4,430 | 13,495 | 15,360 | 10,186
Net income | $ 12,583 | $ 13,351 | $ 11,213 | $ 9,515 | $ 10,555 | $ 12,608 | $ 13,403 | $ 14,602 | 46,662 | 51,168 | 35,926
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |
(Losses) gains recognized |  |  |  |  |  |  |  |  | 0 | 0 | (385)
Income tax benefit |  |  |  |  |  |  |  |  | 0 | 0 | 81
Net income |  |  |  |  |  |  |  |  | 106 | 308 | 0
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 0 | 0 | (385)
Income tax benefit |  |  |  |  |  |  |  |  | (29) | (80) | (82)
Net income |  |  |  |  |  |  |  |  | 0 | 0 | (304)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Other operating expense |  |  |  |  |  |  |  |  | 0 | 124 | 201
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Other operating expense |  |  |  |  |  |  |  |  | 135 | 264 | 185
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 135 | 388 | 386
Net income |  |  |  |  |  |  |  |  | $ 106 | $ 308 | $ 304

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