Warranty Reserves (Changes in Aggregate Warranty Reserve) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Product Liability Contingency [Line Items]
Balance - beginning of the period	$ 34,288	$ 40,797	$ 37,301	$ 46,773
Accrual for products sold	10,884	9,009	29,076	24,863
Expenditures	(10,533)	(10,659)	(31,738)	(32,489)
Balance - end of the period	$ 34,639	$ 39,147	$ 34,639	$ 39,147

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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