Product Warranty Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Standard Product Warranty Accrual Rollforward
Balance at the begining of the period	$ 88,901	$ 92,891	$ 89,940	$ 93,207
Provision for warranties issued and changes in estimates for pre-existing warranties	1,513	2,104	4,220	4,930
Claims paid	(1,689)	(1,885)	(4,752)	(5,073)
Foreign currency translation	(449)	(537)	(1,132)	(491)
Balance at the end of the period	$ 88,276	$ 92,573	$ 88,276	$ 92,573