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INVENTORIES (Schedule of Inventories, Net of Reserves) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
INVENTORIES    
Chassis $ 20,187 $ 18,604
Raw materials 86,157 75,934
Work in process 45,520 40,655
Finished goods 24,465 18,463
Inventories $ 176,329 $ 153,656