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INVENTORIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials and components $ 103,347 $ 105,332
Finished goods 74,573 58,224
Work in progress 13,421 14,269
Aftermarket parts 7,462 6,590
Used trailers 2,265 2,499
Total inventory $ 201,068 $ 186,914