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Inventories Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Mar. 31, 2011
Inventory, Finished Goods $ 40,768 $ 32,604 $ 39,233
Inventory, Raw Materials and Purchased Parts, Net of Reserves 15,410 18,004 15,934
Inventory, Work in Process 2,003 2,606 2,952
Inventory, Net $ 58,181 $ 53,214 $ 58,119