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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 6.4 $ 6.2 $ 6.3
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future issuance (in shares) 1,000    
Weighted average grant-date fair value of options granted (in dollars per share) $ 7.87 $ 7.58 $ 9.00
Weighted average key assumptions [Abstract]      
Expected term 6 years 8 months 12 days 5 years 6 months 5 years 7 months 6 days
Expected price volatility 25.60% 26.20% 34.30%
Risk-free interest rate 1.60% 1.70% 1.70%
Dividend yield 1.00% 0.90% 1.00%
Total intrinsic value of options exercised $ 2.5 $ 3.1 $ 3.5
Fair value of options vested 0.3 0.8 1.0
Aggregate intrinsic value of all outstanding options $ 19.5    
Weighted average remaining contractual term of all outstanding options 5 years    
Outstanding options, exercisable (in shares) 655    
Aggregate intrinsic value of current exercisable shares $ 15.8    
Weighted average exercise price (in dollars per share) $ 16.02    
Weighted average remaining contractual term 3 years 2 months 12 days    
Compensation for stock awards not yet recognized $ 1.4    
Compensation recognition period 2 years 3 months 18 days    
Stock Options [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period 5 years    
Stock options expiration period 10 years    
Restricted Stock [Member]      
Weighted average key assumptions [Abstract]      
Fair value of options vested $ 4.7 $ 4.8 $ 4.2
Compensation for stock awards not yet recognized $ 15.9    
Compensation recognition period 3 years 4 months 24 days