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Note 8 - Accumulated Other Comprehensive Income (Loss) - Reclassification Out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Income tax $ 2,005 $ 1,889
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]    
Recognized actuarial loss [1] 546 660
Income tax (123) (148)
Net of income tax $ 423 $ 512
[1] The recognized actuarial loss and the settlement loss are included in Other income (expense), net in the Consolidated Statements of Income.