Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plans - Summary of Options (Details)

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Stock Incentive Plans - Summary of Options (Details) - Stock Options - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Share-based compensation plan disclosures    
Outstanding as of December 27, 2015 (in shares) 395 462
Vested and expected to vest as of December 27, 2015 (in shares) [1] 379  
Exercisable as of December 27, 2015 (in share) 230  
Weighted Average Exercise Price, Outstanding as of December 27, 2015 (in dollars per share) $ 46.04 $ 38.83
Weighted Average Exercise Price, Vested and expected to vest as of December 27, 2015 (in dollars per share) [1] 44.87  
Weighted Average Exercise Price, Exercisable as of December 27, 2015 (in dollars per share) $ 32.03  
Weighted Average Remaining Years of Contractual Life, Outstanding as of December 27, 2015 6 years 1 month 6 days  
Weighted Average Remaining Years of Contractual Life, Vested and expected to vest as of December 27, 2015 [1] 6 years  
Weighted Average Remaining Years of Contractual Life, Exercisable as of December 27, 2015 4 years 8 months 5 days  
Aggregate Intrinsic Value, Outstanding as of December 27, 2015 $ 8,155  
Aggregate Intrinsic Value, Vested and expected to vest as of December 27, 2015 [1] 8,107  
Aggregate Intrinsic Value, Exercisable as of December 27, 2015 $ 7,013  
[1] The expected to vest options are the result of applying the pre-vesting forfeiture rate assumption to total outstanding options.