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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Inventories    
Inventory, Finished Goods, Net of Reserves $ 11,598 $ 11,592
Inventory, Work in Process, Net of Reserves 29,210 30,109
Inventory, Raw Materials, Net of Reserves 1,243 1,500
Total inventories $ 42,051 $ 43,201