Other Income (Expense), Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Other Income and Expenses [Abstract]
Interest expense	$ (92)	$ (188)	$ (838)
Interest income	310	155	59
Write-off unamortized debt cost	0	0	(1,114)
Other income (expense), net	$ 218	$ (33)	$ (1,893)