Inventories (Components Of Inventories) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Inventories [Line Items]
Raw material	$ 38,397	$ 45,795
Work in process	597	872
Deferred costs of long-term contracts	547	220
Finished goods	98,196	101,111
Inventories, gross	137,737	147,998
Inventory reserves	(14,822)	(14,710)
Inventories, net	$ 122,915	$ 133,288