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Inventories (Schedule Of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Inventories [Abstract]    
Components and parts $ 42,085 $ 37,482
Work-in-process 2,645 4,764
Inventory purchases in transit 49,740 57,474
Finished goods 417,617 389,263
Inventories $ 512,087 $ 488,983