Product Warranty Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Standard Product Warranty Accrual Rollforward
Balance at the begining of the period	$ 92,891	$ 96,385	$ 93,207	$ 97,471
Provision for warranties issued and changes in estimates for pre-existing warranties	2,104	1,785	4,930	5,155
Claims paid	(1,885)	(1,967)	(5,073)	(5,725)
Foreign currency translation	(537)	261	(491)	(437)
Balance at the end of the period	$ 92,573	$ 96,464	$ 92,573	$ 96,464