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Note G - Pensions and Other Postretirement Benefits (Detail) - Assumptions Used
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Discount rate 10.00%  
Expected long-term rate of return on plan assets 1.00%  
Pension Benefits [Member]
   
Discount rate 3.40% 4.00%
Rate of compensation increase 3.50% 3.50%
Discount rate 4.00% 5.00%
Expected long-term rate of return on plan assets 7.00% 7.00%
Rate of compensation increase 3.50% 3.50%
Postretirment Benefits [Member]
   
Discount rate 3.20% 3.76%
Discount rate 3.76% 4.85%