Other (Income) Expense (Components of Other Nonoperating (Income) Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Component of Other Income, Nonoperating [Line Items]
Gain on non-hedged swaptions	$ (87)	$ (43)	$ 0
Gain on property, plant and equipment disposals	(187)	0	0
Loss on termination of interest rate swap	0	0	300
Miscellaneous (income) expense	(3)	(32)	(17)
Other (income) expense, net	$ (277)	$ (75)	$ 283