Inventories (Components Of Inventories) (Details) (USD $) In Thousands	Jul. 02, 2011	Dec. 31, 2010
Inventories
Raw material	$ 42,592	$ 33,441
Work in process	626	171
Deferred costs of long-term contracts	723	482
Finished goods	86,567	88,713
Total inventories, gross	130,508	122,807
Inventory reserves	(12,399)	(9,837)
Total inventories, net	$ 118,109	$ 112,970