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INVENTORIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials and components $ 118,554 $ 105,332
Finished goods 97,937 58,224
Work in progress 17,973 14,269
Aftermarket parts 6,691 6,590
Used trailers 4,760 2,499
Total inventory $ 245,915 $ 186,914