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Stock Based Compensation (Summary Of Activity For Stock Awards And Summary Of RSU Activity And Related Information) (Details) (USD $)
0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended
Apr. 23, 2013
May 07, 2012
Sep. 30, 2013
Stock Awards [Member]
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Apr. 23, 2013
Absolute Performance Based Restricted Stock Units [Member]
Sep. 30, 2013
Absolute Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Non-vested - Beginning of Period (in shares)       65,500    
Awards Granted (in shares) 121,100 65,500 6,708 121,100 16,901 8,188
Awards Vested (in shares)     (6,708)      
Awards Exercised (in shares)       (57,402)    
Awards Forfeited/Canceled (in shares)       (6,286)    
Non-vested - End of Period (in shares)       131,100    
Non-vested, Weighted Average Grant Date Fair Value - Beginning of Period (in dollars per share)       $ 21.48    
Awards Granted, Weighted Average Grant Date Fair Value (in dollars per share)     $ 17.89 $ 17.37   $ 19.35
Awards Vested, Weighted Average Grant Date Fair Value (in dollars per share)     $ 17.89      
Awards Exercised, Weighted Average Grant Date Fair Value (in dollars per share)       $ 19.15    
Awards Forfeited/Canceled, Weighted Average Grant Date Fair Value (in dollars per share)       $ 18.02    
Non-vested, Weighted Average Grant Date Fair Value - End of Period (in dollars per share)       $ 18.77