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Warranty Costs (Schedule Of Activity Reflects In Aggregate Accrued Warranty Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Warranty Costs [Abstract]
Accrued Warranty Costs - Beginning of Period	$ 1,712	$ 1,892
Warranty costs paid	(100)	(135)
Warranty costs accrued	89	174
Accrued Warranty Costs - End of Period	$ 1,701	$ 1,931

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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