Nature of Operations and Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Nature Of Operations and Summary Of Significant Accounting Policies [Line Items]
Income from non-marketable equity investments accounted for on the equity method	$ 2,934	$ 2,998	$ 3,328
Royalty income from patents	0	29	66
Other	(4)	4	3
Other Income	$ 2,929	$ 3,031	$ 3,397