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Stock-Based Compensation Plans (Schedule Of Total Stock Option And Award Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Stock-Based Compensation Plans [Abstract]      
Stock options,Number of Shares , Outstanding at January 1,2011 2,638,523    
Stock Options, Number of Shares, Granted 442,350 513,100 515,100
Stock Options, Number of Options, Exercised/Vested (607,784)    
Stock Options, Number of Options, Canceled/Forfeited (11,634)    
Stock options,Number of Shares , Outstanding at December 31, 2012 2,461,455 2,638,523  
Stock Options, Number of Shares, Vested at December 31, 2012 2,459,031    
Stock Options, Number of Options, Exercisable at December 31, 2012 1,514,211    
Stock Options,Weighted Average Exercise Price, Outstanding at January 1,2011 $ 52.44    
Stock Options, Weighted Average Exercise Price, Granted $ 63.36    
Stock Options, Weighted Average Exercise Price, Exercised/Vested $ 39.98    
Stock Options, Weighted Average Exercise Price, Canceled/Forfeited $ 66.27    
Stock Options,Weighted Average Exercise Price, Outstanding at December 31, 2012 $ 57.41 $ 52.44  
Stock Options, Weighted Average Exercise Price, Vested at December 31,2011 $ 57.42    
Stock Options, Weighted Average Exercise Price, Exercisable at December 31, 2012 $ 54.45    
Stock Options, Weighted Average Remaining Contractual Life, Outstanding at December 31, 2012 6 years 6 months    
Stock Options, Weighted Average Remaining Contractual Life, Vested and Expected to Vest at December 31, 2012 6 years 6 months    
Stock Options, Weighted Average Remaining Contractual Life, Exercisable at December 31, 2012 5 years 2 months 12 days    
Stock Options, Aggregate Intrinsic Value, Outstanding at December 31, 2012 $ 25,777    
Stock Options, Aggregate Intrinsic Value, Vested and Expected to Vest at December 31, 2012 25,741    
Stock Options, Aggregate Intrinsic Value, Exercisable at December 31, 2012 $ 20,366    
Stock Awards, Number of Shares, Outstanding at January 1, 2011 215,123    
Stock Awards, Number of Shares, Granted 103,172    
Stock Awards, Number of Shares, Exercised/Vested (49,003)    
Stock Awards, Number of Shares, Outstanding at December 31, 2012 269,292 215,123  
Stock Awards, Weighted Average Grant-Date Price, Outstanding at January 1, 2011 $ 55.25    
Stock Awards, Weighted Average Grant-Date Price, Granted $ 41.49 $ 64.74 $ 57.13
Stock Awards, Weighted Average Grant-Date Price, Exercised/Vested $ 53.25    
Stock Awards, Weighted Average Grant-Date Price, Outstanding at December 31, 2012 $ 50.34 $ 55.25