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Note Q - Stock-Based Compensation (Detail) - (Table 5) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Outstanding at January 1, 2012 2,702,000
Outstanding at January 1, 2012 (in Dollars per share) $ 17.79
Granted 59,000
Granted (in Dollars per share) $ 43.04
Exercised (201,000)
Exercised (in Dollars per share) $ 17.26
Outstanding at March 31, 2012 2,560,000
Outstanding at March 31, 2012 (in Dollars per share) $ 18.41
Outstanding at March 31, 2012 5.0 years
Outstanding at March 31, 2012 (in Dollars) $ 56,468
Exercisable at March 31, 2012 886,000
Exercisable at March 31, 2012 (in Dollars per share) $ 16.92
Exercisable at March 31, 2012 5.1 years
Exercisable at March 31, 2012 (in Dollars) $ 20,804