Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Inventories [Abstract]
Raw materials	$ 16,980	$ 25,460
Work in process	16,432	15,753
Finished goods	6,520	4,799
Inventories, total	$ 39,932	$ 46,012	[1]

[1] The Condensed Consolidated Balance Sheet at December 31, 2011 has been derived from the audited consolidated financial statements at that date.