Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011	Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance		$ 16	$ 10	$ 10
Charged to Costs and Expenses	10	0	7
Deductions/Write-offs	0	(6)	(1)
Ending Balance	20		16	10
Allowance for Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	56,067	55,342		52,827
Charged to Costs and Expenses	4,156	3,240	0
Deductions/Write-offs	0	0	(2,515)
Ending Balance	$ 60,223	$ 56,067	$ 55,342	$ 52,827