Debt Obligations - Interest Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Debt Disclosure [Abstract]
Interest expense	$ 10,020	$ 9,920	$ 19,942	$ 22,089
Amortization of debt costs and discount on debt	1,191	1,145	2,444	2,360
Capitalized interest	(165)	(106)	(281)	(157)
Interest income	(1,949)	(1,183)	(4,182)	(2,324)
Total interest expense, net	$ 9,097	$ 9,776	$ 17,923	$ 21,968