Product Warranty Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Standard Product Warranty Accrual Rollforward
Balance at the begining of the period	$ 92,638	$ 97,011	$ 93,207	$ 97,471
Provision for warranties issued and changes in estimates for pre-existing warranties	1,547	1,851	2,826	3,370
Claims paid	(1,728)	(2,033)	(3,188)	(3,758)
Foreign currency translation	434	(444)	46	(698)
Balance at the end of the period	$ 92,891	$ 96,385	$ 92,891	$ 96,385