Debt Obligations - Interest Expense, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Debt Disclosure [Abstract]
Cash interest expense	$ 13,071	$ 13,889	$ 26,122	$ 27,140
Non-cash amortization of discount on debt	1,128	1,103	2,318	2,267
Interest income	(994)	(348)	(1,934)	(692)
Total interest expense, net	$ 13,205	$ 14,644	$ 26,506	$ 28,715