Annual report pursuant to Section 13 and 15(d)

Stock-Based Awards (Summary Of Status Of Nonvested RSUs) (Details)

v2.4.0.6
Stock-Based Awards (Summary Of Status Of Nonvested RSUs) (Details) (Restricted Stock Units (RSUs) [Member], USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Restricted Stock Units (RSUs) [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested RSUs, beginning balance (in shares) 1,595,796    
Granted, RSUs (in shares) 313,084    
Vested, RSUs (in shares) (882,056)    
Forfeited, RSUs (in shares) (154,715)    
Nonvested RSUs, ending balance (in shares) 872,109 1,595,796  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Nonvested, beginning balance weighted average grant date fair value (in usd per share) $ 15.38    
Granted, weighted average grant date fair value (in usd per share) $ 36.51 $ 30.32 $ 23.50
Vested, weighted average grant date fair value (in usd per share) $ 8.51    
Forfeited, weighted average grant date fair value (in usd per share) $ 25.70    
Nonvested, ending balance weighted average grant date fair value (in usd per share) $ 28.02 $ 15.38