v3.19.1
INVENTORIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 55,133 $ 39,380
Work in process 21,332 18,115
Finished goods 74,333 84,024
Inventories $ 150,798 $ 141,519