Debt Obligations - Interest Expense, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Debt Disclosure [Abstract]
Cash interest expense	$ 12,748	$ 12,995	$ 38,870	$ 39,508
Premium on debt repurchases	2,188	1,499	2,188	2,127
Amortization of discount on debt	1,314	1,355	3,632	3,622
Interest income	(996)	(395)	(2,930)	(1,088)
Total interest expense, net	$ 15,254	$ 15,454	$ 41,760	$ 44,169