Income Taxes (Narrative) (Details) (USD $)				12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012 Federal [Member]	Dec. 28, 2012 Federal [Member] Minimum [Member]	Dec. 28, 2012 Federal [Member] Maximum [Member]	Dec. 28, 2012 California [Member]	Dec. 28, 2012 Foreign [Member]	Dec. 28, 2012 Unrecognized Income Tax Benefits [Member]	Dec. 30, 2011 Unrecognized Income Tax Benefits [Member]	Dec. 31, 2010 Unrecognized Income Tax Benefits [Member]	Jan. 01, 2010 Unrecognized Income Tax Benefits [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Net operating loss carryforwards			$ 15,500,000			$ 8,000,000	$ 94,200,000
Net operating loss carryforwards, expiration, year				2018	2032
Research and development credit carryforwards						15,800,000
Foreign subsidiary accumulated undistributed earnings	306,700,000
Unrecognized deferred tax liability	107,300,000
Total amount of the unrecognized tax benefits	$ 22,343,000	$ 15,733,000						$ 35,190,000	$ 28,718,000	$ 28,113,000	$ 43,297,000