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INVENTORIES (Schedule of Inventories, Net of Reserves) (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
INVENTORIES    
Chassis $ 10,655 $ 5,753
Raw materials 66,843 59,651
Work in process 43,229 33,994
Finished goods 20,464 15,510
Inventories $ 141,191 $ 114,908