Product Warranty Costs and Service Returns - (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Standard Product Warranty Accrual Rollforward
Balance at the begining of the period	$ 102,107	$ 95,933	$ 101,163	$ 94,712
Provision for warranties issued and changes in estimates for pre-existing warranties	2,583	1,653	5,234	3,025
Claims paid	(1,892)	(1,213)	(3,928)	(1,841)
Foreign currency translation	(276)	92	53	569
Balance at the end of the period	$ 102,522	$ 96,465	$ 102,522	$ 96,465