Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 20	$ 10	$ 16
Charged to Costs and Expenses	(20)	10	0
Deductions/Write-offs	0	0	(6)
Ending Balance	0	20	10
Allowance for Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	60,223	56,067	52,827
Charged to Costs and Expenses	3,305	4,156	3,240
Deductions/Write-offs	0	0	0
Ending Balance	$ 63,528	$ 60,223	$ 56,067