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INVENTORIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Finished goods $ 103,560 $ 105,527
Work in process 24,699 17,021
Obsolescence reserve (24,852) (25,477)
Inventories $ 103,407 $ 97,071