Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	$ (285)	$ (103)	$ (99)
Valuation Allowances and Reserves, Balance	151,406	150,331	148,438	272,173
Valuation Allowances and Reserves, Charged to Cost and Expense	1,677	1,938	(123,636)
Valuation Allowances and Reserves, Charged to Other Accounts	(317)	58	0
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries		0	0
Valuation Allowances and Reserves, Balance	150,528	149,209	147,499	271,208
Valuation Allowances and Reserves, Charged to Cost and Expense	1,636	1,652	(123,709)
Valuation Allowances and Reserves, Charged to Other Accounts	(317)	58	0
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	(285)	(103)	0
Valuation Allowances and Reserves, Balance	878	1,122	939	866
Valuation Allowances and Reserves, Charged to Cost and Expense	41	286	73
Valuation Allowances and Reserves, Charged to Other Accounts		0	0
Warranty Reserves [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Write-offs, Net Of Recoveries	0	0	(99)
Valuation Allowances and Reserves, Balance	0	0	0	99
Valuation Allowances and Reserves, Charged to Cost and Expense	0	0	0
Valuation Allowances and Reserves, Charged to Other Accounts	$ 0	$ 0	$ 0