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Share-Based Compensation - Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Options      
Exercised (in shares) (293,439) (124,931) (29,288)
Options | 2006 Incentive Plan      
Options      
Outstanding at the beginning of the period (in shares) 945,083    
Granted (in shares) 22,757    
Exercised (in shares) (293,439)    
Forfeited (in shares) (8,684)    
Outstanding at the end of the period (in shares) 665,717 945,083  
Options exercisable at the end of the period (in shares) 456,639    
Vested or expected to vest at the end of the period (in shares) 663,088    
Weighted Average Exercise Price      
Outstanding at the beginning of the period (in dollars per share) $ 22.95    
Granted (in dollars per share) 44.87    
Exercised (in dollars per share) 21.88    
Forfeited (in dollars per share) 24.58    
Outstanding at the end of the period (in dollars per share) 24.14 $ 22.95  
Options exercisable at the end of the period (in dollars per share) 22.78    
Vested or expected to vest at the end of the period (in dollars per share) $ 24.13    
Weighted Average Remaining Contractual Term      
Outstanding at the beginning of the period 4 years    
Outstanding at the end of the period 4 years    
Options exercisable at the end of the period 3 years 4 months 21 days    
Vested or expected to vest at the end of the period 4 years    
Aggregate Intrinsic Value      
Exercised (in dollars) $ 5,372 $ 700 $ 100
Outstanding at the end of the period (in dollars) 13,851    
Options exercisable at the end of the period (in dollars) 10,123    
Vested or expected to vest at the end of the period (in dollars) $ 13,802