Debt Obligations - Interest Expense, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Debt Disclosure [Abstract]
Cash interest expense	$ 13,253	$ 14,362
Non-cash amortization of discount on debt	1,164	1,159
Capitalized interest	0	(7)
Interest income	(343)	(62)
Total interest expense, net	$ 14,074	$ 15,452