Other (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015	Dec. 27, 2015
Other Expense [Line Items]
Restructuring charge	$ 2,949	$ 0	$ 14,804	$ 0
Severance liability	33,800		33,800		$ 14,900
Advertising expense	22,300	20,600	63,600	63,100
Capitalized Computer Software Costs
Other Expense [Line Items]
Capitalized computer software amortization	2,800	2,900	8,500	8,900
Selling, General and Administrative Expenses
Other Expense [Line Items]
Severance costs	13,000	$ 1,000	18,300	$ 4,400
International Operation Streamlining Plan
Other Expense [Line Items]
Restructuring charge			14,800
Additional costs expected	$ 500		$ 500