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Share-based Compensation (Options) (Details) - Options - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 27, 2016
Dec. 29, 2015
Dec. 30, 2014
Shares      
Outstanding at the beginning of the period (in shares) 328,498    
Granted (in shares) 0 0 0
Cancelled/Expired (in shares) (1,981)    
Exercised (in shares) (208,444)    
Outstanding at the end of the period (in shares) 118,073 328,498  
Exercisable at the end of period (in shares) 118,073    
Weighted-Average Exercise Price      
Outstanding at the beginning of the period (in dollars per share) $ 13.10    
Cancelled/Expired (in dollars per share) 14.61    
Exercised (in dollars per share) 12.82    
Outstanding at the end of the period (in dollars per share) 13.57 $ 13.10  
Exercisable at the end of the period (in dollars per share) $ 13.57    
Weighted-Average Remaining Contractual Term      
Outstanding at the end of the period 6 months    
Exercisable at the end of the period 6 months    
Aggregate Intrinsic Value      
Outstanding at the end of the period (in dollars) $ 4,250    
Exercisable at the end of the period (in dollars) 4,250    
Intrinsic value of options exercised (in dollars) 6,300 $ 6,500 $ 6,100
Cash received before tax withholdings from options exercised 2,700 4,700 5,300
Excess tax benefit realized from tax deductions associated with options exercised $ 1,800 $ 1,700 $ 1,500