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Note E - Accumulated Other Comprehensive Income (Detail) - Accumulated Other Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Recognized actuarial loss (gain) $ 431 [1] $ 448 [1]
Total before income tax 1,817 448
Income tax (608) (150)
Net of income tax 1,209 298
Cost Of Goods Sold [Member]
    
Settlement loss 916  
Selling And General And Administrative Expenses [Member]
    
Settlement loss $ 470  
[1] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost. See Note D for additional details.