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Common Stock (Narrative) (Details) (USD $)
0 Months Ended 12 Months Ended
Jul. 30, 2013
May 02, 2012
Aug. 29, 2011
Dec. 31, 2013
Apr. 30, 2013
May 26, 2011
Common Stock [Abstract]            
Stock Repurchase Program, Authorized Amount $ 80,000,000 $ 40,000,000 $ 20,000,000      
Treasury Stock, Value, Acquired, Cost Method, Authorized Repurchase Program       29,700,000    
Treasury Stock Shares, Acquired, Authorized Repurchase Program       $ 1,799,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       3,574,000 3,574,000 2,474,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant       1,184,322