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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 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Settlement loss (a) $ (4,800) $ (400) $ (6,400) $ (2,100)
Total before income tax (2,432) (11,056) (10,719) (29,282)
Income tax 211 2,274 1,951 5,974
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]        
Recognized actuarial loss (a) [1] 471 568 1,590 1,917
Settlement loss (a) [1] 4,759 388 6,355 2,116
Total before income tax 5,230 956 7,945 4,033
Income tax (1,249) (230) (1,878) (944)
Net of income tax $ 3,981 $ 726 $ 6,067 $ 3,089
[1] The recognized actuarial loss and the settlement loss are included in Other income (expense), net in the Consolidated Statements of Income.