Inventories (Components Of Inventories) (Details) (USD $) In Thousands	Oct. 01, 2011	Dec. 31, 2010
Inventories [Abstract]
Raw material	$ 46,270	$ 33,441
Work in process	525	171
Deferred costs of long-term contracts	99	482
Finished goods	87,677	88,713
Total inventories, gross	134,571	122,807
Inventory reserves	(14,193)	(9,837)
Total inventories, net	$ 120,378	$ 112,970