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SEGMENTS - Reportable Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 416,814 | $ 464,040 | $ 550,610 | $ 515,276 | $ 596,100 | $ 632,828 | $ 686,620 | $ 620,952 | $ 657,449 | $ 655,150 | $ 642,769 | $ 546,761 | $ 1,946,740 | $ 2,536,500 | $ 2,502,129
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,681,668 | 2,038,313 | 2,179,438
Gross profit | $ 42,959 | $ 56,009 | $ 89,658 | $ 76,446 | $ 108,223 | $ 122,910 | $ 151,027 | $ 116,027 | $ 94,597 | $ 92,005 | $ 78,034 | $ 58,055 | 265,072 | 498,187 | 322,691
Other operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 621,176 | 186,238 | 156,049
Segment income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | (356,104) | 311,949 | 166,642
Product liability matter |  |  |  |  |  |  |  |  |  |  |  |  | 450,000 |  |
Consolidated income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 93,896 |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 56,985 | 45,320 | 46,969
Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,747,039 | 2,320,274 | 2,312,637
Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 199,701 | 216,226 | 189,492
Operating Segments | Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,755,133 | 2,338,604 | 2,320,914
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,537,515 | 1,898,740 | 2,043,072
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  | 217,618 | 439,864 | 277,842
Other operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 69,341 | 72,936 | 67,900
Segment income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 148,277 | 366,928 | 209,942
Product liability matter |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Consolidated income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 148,277 |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 49,987 | 40,443 | 41,187
Operating Segments | Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 205,062 | 220,873 | 193,476
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  | 157,608 | 162,550 | 148,627
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  | 47,454 | 58,323 | 44,849
Other operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 12,037 | 13,674 | 14,291
Segment income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 35,417 | 44,649 | 30,558
Product liability matter |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Consolidated income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 35,417 |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 2,681 | 2,201 | 2,717
Corporate and Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (13,455) | (22,977) | (12,261)
Intersegment sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (13,455) | (22,977) | (12,261)
Intersegment sales | Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (8,094) | (18,330) | (8,277)
Intersegment sales | Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (5,361) | (4,647) | (3,984)
Corporate and Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  | (13,455) | (22,977) | (12,261)
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 539,798 | 99,628 | 73,858
Segment income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | (539,798) | (99,628) | (73,858)
Product liability matter |  |  |  |  |  |  |  |  |  |  |  |  | 450,000 |  |
Consolidated income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | (89,798) |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,317 | $ 2,676 | $ 3,065

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