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Note F - Accumulated Other Comprehensive Income (Loss) (Details) - Reclassifications out of Accumulated Other Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Settlement loss (b) $ (82,824) $ (79,934) $ (165,334) $ (151,167)
Settlement loss (c) (13,483) (12,964) (26,344) (25,931)
Total before income tax 13,228 13,496 28,060 21,723
Income tax (4,368) (4,328) (9,246) (6,737)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Recognized actuarial loss (a) 77 [1] 352 [1] 338 [1] 783 [1]
Settlement loss (b)    [2] 1,058 [2]    [2] 1,974 [2]
Settlement loss (c)    [3] 543 [3]    [3] 1,013 [3]
Total before income tax 77 1,953 338 3,770
Income tax (40) (584) (127) (1,192)
Net of income tax $ 37 $ 1,369 $ 211 $ 2,578
[1] The recognized actuarial loss is included in the computation of net periodic benefit cost. See Note D for additional details.
[2] This portion of the settlement loss is included in Cost of products sold on the Statements of Income.
[3] This portion of the settlement loss in included in Selling, general & administrative expenses on the Statements of Income.