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Note 7 - Accumulated Other Comprehensive Loss - Reclassification Out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Settlement loss $ (2,300) $ (4,600) $ 0
Total before income tax (37,248) (31,246) (45,166)
Income tax 7,397 6,058 9,351
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]      
Recognized actuarial loss [1] 2,484 2,466 1,753
Settlement loss [2] 2,304 4,583 0
Total before income tax 4,788 7,049 1,753
Income tax (951) (1,368) (363)
Net of income tax $ 3,837 $ 5,681 $ 1,390
[1] The recognized actuarial loss is included in the computation of net periodic benefit cost. See Note 9 to the Consolidated Financial Statements, Pensions and Other Postretirement Benefits
[2] The settlement loss is included in Other (expense) income, net in the Consolidated Statements of Income