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Note E - Accumulated Other Comprehensive Income (Loss) - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Total before income tax $ (36,482) $ (37,266) $ (53,734)
Income tax expense 11,599 12,157 17,593
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]      
Recognized actuarial loss (a) [1] 1,402 1,581 483
Total before income tax 1,402 5,364 483
Income tax expense (446) (1,749) (177)
Net of income tax 956 3,615 306
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Cost of Sales [Member]      
Settlement loss [2] 2,584
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Selling, General and Administrative Expenses [Member]      
Settlement loss [3] $ 1,199
[1] The recognized actuarial loss is included in the computation of net periodic benefit cost. See Note G, Pensions and Other Postretirement Benefits.
[2] This portion of the settlement loss is included in cost of products sold in the Consolidated Statements of Income.
[3] This portion of the settlement loss is included in selling, general and administrative expenses in the Consolidated Statements of Income.