Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plans (Details)

v3.6.0.2
Stock Incentive Plans (Details) - USD ($)
$ in Millions
12 Months Ended 24 Months Ended
Dec. 25, 2016
Dec. 27, 2015
Dec. 28, 2014
Dec. 25, 2011
Dec. 28, 2014
Share-based compensation plan disclosures          
Total stock-based compensation cost $ 4.5 $ 4.7 $ 4.2    
Income tax benefits from stock-based compensation cost 0.4 $ 2.0 1.7    
Total unrecognized compensation cost $ 4.3        
Number of common shares issued per RSU 1        
Stock Options          
Share-based compensation plan disclosures          
Shares outstanding 408,000 395,000      
Weighted average remaining vesting period 1 year 4 months 24 days        
Restricted Stock          
Share-based compensation plan disclosures          
Weighted average remaining vesting period 1 year 1 month 6 days        
Restricted Stock | Board of Directors          
Share-based compensation plan disclosures          
Vesting period 1 year 1 year     3 years
2007 Stock Plan          
Share-based compensation plan disclosures          
Maximum number of shares of the company's common stock that may be issued or transferred 2,074,600        
Period following the change in control during which termination of an individual without cause will trigger vesting of award 2 years        
Shares outstanding 408,445        
Vested (in shares) 196,724        
2007 Stock Plan | Time Based RSUs          
Share-based compensation plan disclosures          
Vesting period 4 years        
Other stock-based compensation plans          
Share-based compensation plan disclosures          
Expiration term 10 years        
Shares outstanding 0        
Long-Term Cash Incentive Plan | Deferred compensation, excluding share-based payments and retirement benefits          
Share-based compensation plan disclosures          
Performance and vesting period       3 years  
Compensation expense $ (2.3) $ 3.3 0.8    
Payments of performance stock awards 3.4 1.8 $ 2.4    
Long-Term Cash Incentive Plan | Deferred compensation, excluding share-based payments and retirement benefits | Accrued payroll liabilities and payroll-related liabilities          
Share-based compensation plan disclosures          
Long-term cash incentive plan liability $ 0.7 $ 6.3