Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 151,406	$ 150,331	$ 148,438
Valuation Allowances and Reserves, Charged (Credit) to Cost and Expense	(9,877)	1,677	1,938
Valuation Allowances and Reserves, Charged to Other Accounts	645	(317)	58
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	(3)	(285)	(103)
Valuation Allowances and Reserves, Balance	142,171	151,406	150,331
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	150,528	149,209	147,499
Valuation Allowances and Reserves, Charged (Credit) to Cost and Expense	(9,958)	1,636	1,652
Valuation Allowances and Reserves, Charged to Other Accounts	645	(317)	58
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	0	0	0
Valuation Allowances and Reserves, Balance	141,215	150,528	149,209
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	878	1,122	939
Valuation Allowances and Reserves, Charged (Credit) to Cost and Expense	0	41	286
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	(3)	(285)	(103)
Valuation Allowances and Reserves, Balance	875	878	1,122
Warranty Reserves [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	0	0	0
Valuation Allowances and Reserves, Charged (Credit) to Cost and Expense	81	0	0
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	0
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	0	0	0
Valuation Allowances and Reserves, Balance	$ 81	$ 0	$ 0