Warranty Reserves (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Warranty reserve activity
Balance beginning of period	$ 10,357	$ 10,827	$ 10,534	$ 11,003
Provision charged to income	4,332	4,173	8,409	8,513
Payments	(4,388)	(3,843)	(8,355)	(8,667)
Adjustments to previously provided warranties, net	471	(688)	174	(323)
Foreign currency translation and acquisitions	14	(18)	24	(75)
Balance end of period	$ 10,786	$ 10,451	$ 10,786	$ 10,451