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Inventories - Major Components of Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventories [Abstract]    
Raw materials and purchased components $ 91,417 $ 70,552
Service parts, garments and accessories 103,231 95,110
Finished goods 255,698 196,691
Less: reserves (21,712) (17,357)
Inventories $ 428,634 $ 344,996