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SEGMENTS - Major Product Categories and Percentage of Consolidated Net Sales (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
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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
New trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,354,373 | 1,087,820 | 1,662,679
Used trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 2,514 | 8,386 | 2,479
Components, parts and services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 131,929 | 123,517 | 155,104
Equipment and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 314,452 | 262,166 | 498,874
Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,628,694 | 1,308,935 | 2,103,955
Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 174,574 | 172,954 | 215,181
Operating Segments | Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,633,319 | 1,315,429 | 2,114,809
Operating Segments | Transportation Solutions | New trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 1,354,375 | 1,087,978 | 1,661,897
Operating Segments | Transportation Solutions | Used trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 165 | 3,677 | 85
Operating Segments | Transportation Solutions | Components, parts and services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Operating Segments | Transportation Solutions | Equipment and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 278,779 | 223,774 | 452,827
Operating Segments | Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 177,166 | 179,474 | 226,019
Operating Segments | Parts & Services | New trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 179 | 3,387 | 7,859
Operating Segments | Parts & Services | Used trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 2,349 | 4,709 | 2,394
Operating Segments | Parts & Services | Components, parts and services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 131,929 | 123,517 | 155,104
Operating Segments | Parts & Services | Equipment and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 42,709 | 47,861 | 60,662
Corporate and Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (7,217) | (13,014) | (21,692)
Corporate and Eliminations | New trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (181) | (3,545) | (7,077)
Corporate and Eliminations | Used trailers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Corporate and Eliminations | Components, parts and services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Corporate and Eliminations | Equipment and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | (7,036) | (9,469) | (14,615)
Corporate and Eliminations | Transportation Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 4,625 | 6,494 | 10,854
Corporate and Eliminations | Parts & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,592 | $ 6,520 | $ 10,838
Product Concentration Risk | Sales revenue, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Product Concentration Risk | New trailers | Sales revenue, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales |  |  |  |  |  |  |  |  |  |  |  |  | 75.20% | 73.40% | 71.60%
Product Concentration Risk | Used trailers | Sales revenue, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales |  |  |  |  |  |  |  |  |  |  |  |  | 0.10% | 0.60% | 0.10%
Product Concentration Risk | Components, parts and services | Sales revenue, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales |  |  |  |  |  |  |  |  |  |  |  |  | 7.30% | 8.30% | 6.70%
Product Concentration Risk | Equipment and other | Sales revenue, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated net sales |  |  |  |  |  |  |  |  |  |  |  |  | 17.40% | 17.70% | 21.50%

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