Inventories (Components Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Inventories [Abstract]
Raw material	$ 44,213	$ 33,441
Work in process	872	171
Deferred costs of long-term contracts	220	482
Finished goods	102,693	88,713
Total inventories, gross	147,998	122,807
Inventory reserves	(14,710)	(9,837)
Total inventories, net	$ 133,288	$ 112,970