Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Stock-Based Awards (Summary Of Status Of Nonvested RSUs) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dividend equivalents [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) 18,302    
Nonvested RSUs, ending balance (in shares) 83,132 18,302  
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) 619,881    
Granted, RSUs (in shares) 235,207    
Stock Issued During Period, Shares, Dividend Reinvestment Plan 106,593    
Vested, RSUs (in shares) (211,248)    
Forfeited, RSUs (in shares) (75,539)    
Nonvested RSUs, ending balance (in shares) 674,894 619,881  
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) $ 48.88    
Granted, weighted average grant date fair value (in usd per share) $ 65.89 $ 55.06 $ 58.83
Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than options, non-vested dividend reinvestment shares, weighted average fair value $ 0.00    
Vested, weighted average grant date fair value (in usd per share) $ 37.52    
Forfeited, weighted average grant date fair value (in usd per share) 57.59    
Nonvested, ending balance weighted average grant date fair value (in usd per share) $ 57.92 $ 48.88