Other (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Dec. 27, 2015
Other Expense [Line Items]
Severance costs	$ 3,600	$ 1,500
Severance liability	10,400		$ 14,900
Advertising expense	21,100	21,400
Depreciation expense	15,472	14,844
Capitalized Computer Software Costs
Other Expense [Line Items]
Depreciation expense	$ 3,000	$ 2,900