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Stock-Based Awards - Other Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 25, 2016
Dec. 27, 2015
Dec. 28, 2014
Dec. 25, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 12.4 $ 10.6 $ 8.9  
Pool of excess tax benefits 25.0      
Payments under long term incentive plan based on total shareholder return during year $ 4.0 $ 3.0 $ 1.0  
Length of performance measurement period for long-term incentive compensation (in years) 3 years      
Unrecognized compensation expense releted to the unvested portion of our stock-based awards $ 14.0      
Weighted average years to be recognized over 1 year 4 months 28 days      
Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (shares) 0 0 0  
2010 Incentive Plan [Member] | Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award term 10 years      
Vesting period 3 years      
2004 Directors' Plan [Member] | Non-Employee Director Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Annual stock option grant to directors 4,000      
2004 Directors' Plan [Member] | Non-Employee Director Stock Options [Member] | Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award term 10 years     10 years
Vesting period       1 year
Granted (shares) 0 0 0  
Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target number of performance awards granted 0.00%      
Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target number of performance awards granted 200.00%