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SEGMENTS - Reportable Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 479,277 | $ 482,566 | $ 449,422 | $ 392,003 | $ 404,078 | $ 351,584 | $ 339,153 | $ 387,074 | $ 579,001 | $ 580,908 | $ 626,053 | $ 533,174 | $ 1,803,268 | $ 1,481,889 | $ 2,319,136
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 48,842 | 47,970 | 42,357
Income (Loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 33,542 | (85,608) | 142,786
Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,628,694 | 1,308,935 | 2,103,955
Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 174,574 | 172,954 | 215,181
Operating Segments | Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,633,319 | 1,315,429 | 2,114,809
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 41,819 | 40,236 | 34,821
Income (Loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 61,869 | (29,702) | 153,907
Operating Segments | Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 177,166 | 179,474 | 226,019
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 4,781 | 5,512 | 5,828
Income (Loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | 20,201 | (12,658) | 31,523
Corporate and Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (7,217) | (13,014) | (21,692)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 2,242 | 2,222 | 1,708
Income (Loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  | (48,528) | (43,248) | (42,644)
Corporate and Eliminations | Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 4,625 | 6,494 | 10,854
Corporate and Eliminations | Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,592 | $ 6,520 | $ 10,838

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