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GOODWILL & OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Line Items]          
Goodwill, gross $ 296,818 $ 296,811 $ 296,822 $ 296,834 $ 296,843
Accumulated impairment losses (108,400) (108,400) (108,400) (108,400) (108,400)
Net goodwill 188,418 188,411 188,422 188,434 188,443
Effects of foreign currency 7 (11) (12) (9)  
Transportation Solutions          
Goodwill [Line Items]          
Goodwill, gross 188,748 188,744 188,751 188,759 188,764
Accumulated impairment losses (68,257) (68,257) (68,257) (68,257) (68,257)
Net goodwill 120,491 120,487 120,494 120,502 120,507
Effects of foreign currency 4 (7) (8) (5)  
Parts & Services          
Goodwill [Line Items]          
Goodwill, gross 108,070 108,067 108,071 108,075 108,079
Accumulated impairment losses (40,143) (40,143) (40,143) (40,143) (40,143)
Net goodwill 67,927 67,924 67,928 67,932 $ 67,936
Effects of foreign currency $ 3 $ (4) $ (4) $ (4)