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Note Q - Stock-Based Compensation (Detail) (USD $)
1 Months Ended 3 Months Ended
Feb. 08, 2012
Mar. 31, 2012
Mar. 31, 2011
May 27, 2007
May 26, 2006
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   9,144,000   3,487,500 2,700,000
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period   224,191 184,688    
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable During Period Weighted Average Exercise Price (in Dollars per share)   $ 23.26 $ 10.38    
Share Based Compensation Arrangement By Share-Based Payment Award Equity Options Nonvested Number   1,674,000 2,342,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)   $ 8,743,000 $ 11,786,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition   2.4 3.1    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)   $ 16.84 $ 15.70    
Employee Service Share Based Compensation Nonvested Restricted Stock Awards Total Compensation Cost Not Yet Recognized (in Dollars)   54,063,000      
Employee Service Share Based Compensation Nonvested Restricted Awards Total Compensation Cost Not Yet Recognized Period For Recognition   9.4      
Related Party Transaction Restricted Shares Granted During The Period (in Dollars) $ 975,371