Defined Contribution Benefit Plan Defined Contribution Benefit Plan (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2016	Dec. 29, 2015	Dec. 30, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Company Match (as a percent)	50.00%
Match Limit for Employee Pay (as a percent)	3.00%
Vesting Percentage (as a percent)	25.00%
Defined Contribution Vesting Period (in years)	5 years
Defined Benefit Plan, Contributions by Employer	$ 2.7	$ 2.3	$ 2.2