Summary Of Significant Accounting Policies (Schedule Of Movement Of Warranty Reserves) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013
Accounting Policies [Abstract]
Balance at beginning of year	$ 4,521	$ 3,995
Accruals for warranties issued, net	3,054	3,353
Settlements made	(2,717)	(2,980)
Foreign currency translation adjustment	(184)	(4)
Balance at end of period	$ 4,674	$ 4,364