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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Inventories, net:    
Raw materials $ 18,036 $ 25,460
Work in process 17,103 15,753
Finished goods 5,730 4,799
Inventories, total $ 40,869 $ 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.