Annual report pursuant to Section 13 and 15(d)

Employee Benefit Programs (Details)

v3.3.1.900
Employee Benefit Programs (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended 168 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Dec. 29, 2013
Dec. 27, 2015
Employee Stock Purchase Plan        
Compensation expense $ 4.7 $ 4.2 $ 3.8  
Employee Defined Contribution Plan        
Minimum age of employees to be eligible to participate in defined contribution plan 21 years      
Percentage of matching contribution 25.00%      
Percentage of maximum compensation matched by employer 4.00%      
Matching contribution expense $ 0.3 $ 0.3 0.3  
Employee Stock Purchase Plan        
Employee Stock Purchase Plan        
Maximum percentage of base compensation that can be contributed by the eligible team members 15.00%     15.00%
Estimated subscription date fair value (as a percent) 85.00%      
Requisite employment period to be eligible to participate in the plan 1 year      
Requisite working hours per week to be eligible to participate in the plan 20 hours      
Operational period of the plan 6 months      
Number of shares outstanding 300,000     300,000
Number of shares issued under the plan 11,361     251,931
Number of shares available for future issuance under the plan 48,069     48,069
Risk-free interest rate (as a percent) 0.46% 0.12%    
Expected life 6 months 6 months    
Expected volatility (as a percent) 39.73% 41.22%    
Dividend yield (as a percent) 0.00% 0.00%    
Weighted average fair value per share at grant date (in dollars per share) $ 13.37 $ 14.42    
Compensation expense $ 0.2 $ 0.2 0.2  
Deferred compensation, excluding share-based payments and retirement benefits | Employee Deferred Compensation Plan        
Employee Deferred Compensation Plan        
Deferred payment, participant limit per calendar year as a percentage of base salary 75.00%      
Deferred payment, participant limit per calendar year as a percentage of variable compensation and commissions 100.00%      
Deferred payment, maximum employer match   25.00%    
Deferred payment, maximum matching contribution percentage   4.00%    
Deferred compensation expense   $ 0.3 $ 0.2  
Other assets, net | Deferred compensation, excluding share-based payments and retirement benefits | Employee Deferred Compensation Plan        
Employee Deferred Compensation Plan        
Deferred compensation assets $ 6.9     $ 6.9
Liability for participant contributions and investment income   5.7    
Other non-current liability | Deferred compensation, excluding share-based payments and retirement benefits | Employee Deferred Compensation Plan        
Employee Deferred Compensation Plan        
Liability for participant contributions and investment income $ 6.9     $ 6.9
Cash surrender value of company-owned whole-life insurance contracts   $ 5.7