Supplemental Financial Information (Interest Expense Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Dec. 26, 2010
Supplemental Financial Information [Abstract]
Interest income	$ 2,865		$ 4,228		$ 3,538
Interest expense on debt	(4,451)		(6,495)		(4,786)
Interest expense, net	$ (1,586)	[1]	$ (2,267)	[1]	$ (1,248)	[1]

[1] As Restated