Summary Of Significant Accounting Policies (Schedule Of Movement Of Warranty Reserves) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Accounting Policies [Abstract]
Balance at beginning of year	$ 4,521	$ 3,995
Accruals for warranties issued, net	810	888
Settlements made	(962)	(679)
Foreign currency translation adjustment	13	(107)
Balance at end of period	$ 4,382	$ 4,097