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Share-based Compensation, Restricted Stock and PSU (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended 48 Months Ended
Jan. 08, 2019
Dec. 25, 2018
Dec. 26, 2017
Dec. 27, 2016
Dec. 25, 2018
RSUs          
Share-based Compensation          
Number of common shares that a holder would receive upon satisfaction of the vesting requirement (in shares)   1     1
Shares          
Outstanding at the beginning of the period (in shares)   949,991      
Granted (in shares)   439,259      
Forfeited (in shares)   (35,077)      
Vested (in shares)   (529,228)      
Outstanding at the end of period (in shares)   824,945 949,991   824,945
Weighted-Average Grant Date Fair Value          
Outstanding at the beginning of the period (in dollars per share)   $ 43.62      
Granted (in dollars per share)   60.79      
Forfeited (in dollars per share)   47.66      
Vested (in dollars per share)   42.20      
Outstanding at the end of the period (in dollars per share)   $ 53.51 $ 43.62   $ 53.51
Weighted-Average Remaining Contractual Term (years)          
Weighted-Average Remaining Contractual Term   1 year 3 months 18 days      
Aggregate Intrinsic Value          
Outstanding at the end of the period (in dollars)   $ 46,870     $ 46,870
Unrecognized compensation cost          
Unrecognized compensation cost of unvested stock awards (in dollars)   $ 22,000     $ 22,000
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards   1 year 3 months 18 days      
Share-based Compensation, other disclosures          
Intrinsic value of awards vested (in dollars)   $ 32,100 $ 23,400 $ 21,500  
Excess tax benefit recognized within the income tax provision   $ 1,900 $ 1,600    
Excess tax benefit recorded in additional paid-in capital       1,500  
RSUs | Minimum          
Share-based Compensation, other disclosures          
Vesting period   1 year      
RSUs | Maximum          
Share-based Compensation, other disclosures          
Vesting period   5 years      
PSUs          
Share-based Compensation          
Number of common shares that a holder would receive upon meeting a performance obligation and vesting requirement (in shares)   1     1
Shares          
Outstanding at the beginning of the period (in shares)   205,000      
Granted (in shares) 90,000        
Incremental Performance Shares (in shares) 52,169 40,576      
Vested (in shares) (142,169) (155,576)      
Outstanding at the end of period (in shares)   90,000 205,000   90,000
Weighted-Average Grant Date Fair Value          
Outstanding at the beginning of the period (in dollars per share)   $ 46.16      
Incremental Performance Shares (in dollars per share)   39.88      
Vested (in dollars per share)   39.88      
Outstanding at the end of the period (in dollars per share)   $ 54.18 $ 46.16   $ 54.18
Weighted-Average Remaining Contractual Term (years)          
Weighted-Average Remaining Contractual Term   1 month 6 days      
Aggregate Intrinsic Value          
Outstanding at the end of the period (in dollars)   $ 5,113     $ 5,113
Unrecognized compensation cost          
Unrecognized compensation cost of unvested stock awards (in dollars)   $ 300     $ 300
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards   1 month 6 days      
Share-based Compensation, other disclosures          
Target percentage relating to shares granted (as a percent)   100.00%      
Vesting period         1 year
Intrinsic value of awards vested (in dollars)   $ 8,900 $ 8,600 $ 5,000  
Excess tax benefit recognized within the income tax provision   $ 700 $ 800