Income Taxes (Narrative) (Details) (USD $)						12 Months Ended
	Jan. 03, 2014	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Jan. 03, 2014 Federal [Member]	Jan. 03, 2014 Federal [Member] Minimum [Member]	Jan. 03, 2014 Federal [Member] Maximum [Member]	Jan. 03, 2014 California [Member]	Jan. 03, 2014 Foreign [Member]	Jan. 03, 2014 Finland [Member]	Dec. 30, 2013 Finland [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 38,100,000	$ 26,900,000
Enacted Statutory Tax Rate, Percent										20.00%	24.50%
Net operating loss carryforwards					10,100,000			300,000	144,800,000
Net operating loss carryforwards, expiration, year						Jan. 01, 2020	Jan. 01, 2032
Research and development credit carryforwards								16,300,000
Foreign subsidiary accumulated undistributed earnings	509,800,000
Unrecognized deferred tax liability	164,900,000
Total amount of the unrecognized tax benefits	44,107,000	32,250,000	25,984,000	25,473,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 3,600,000	$ 2,700,000