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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Components and parts $ 60,258 $ 49,438
Work-in-process 9,471 12,345
Finished goods 613,257 480,704
Inventories $ 682,986 $ 542,487