Debt Obligations - Interest Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014
Debt Disclosure [Abstract]
Cash interest expense	$ 9,919	$ 12,795	$ 32,008	$ 38,999
Premium on debt repurchases	0	2,188		2,188	$ 0
Amortization of debt issuance costs and discount on debt	1,180	1,314	3,540	3,632
Capitalized interest	(85)	(47)	(242)	(129)
Interest income	(1,887)	(996)	(4,211)	(2,930)
Total interest expense, net	$ 9,127	$ 15,254	$ 31,095	$ 41,760