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INVENTORY (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Finished product ready for sale $ 423,963 $ 432,092
Work-in-process, bulk product and raw materials 59,542 51,225
Packaging supplies 6,134 2,415
Inventory $ 489,639 $ 485,732