SEGMENTS - Major Product Categories and Percentage of Consolidated Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Product Information [Line Items]
Net sales	$ 381,595	$ 464,040	$ 1,221,301	$ 1,529,926
Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	100.00%	100.00%	100.00%	100.00%
Eliminations
Product Information [Line Items]
Net sales	$ (13,843)	$ (3,790)	$ (32,853)	$ (11,172)
Transportation Solutions
Product Information [Line Items]
Net sales	320,932	413,321	1,049,332	1,377,544
Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	334,474	415,506	1,081,491	1,384,639
Transportation Solutions \| Eliminations
Product Information [Line Items]
Net sales	(13,542)	(2,185)	(32,159)	(7,095)
Parts & Services
Product Information [Line Items]
Net sales	60,663	50,719	171,969	152,382
Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	60,964	52,324	172,663	156,459
Parts & Services \| Eliminations
Product Information [Line Items]
Net sales	(301)	(1,605)	(694)	(4,077)
New trailers
Product Information [Line Items]
Net sales	$ 245,565	$ 306,916	$ 791,100	$ 1,054,718
New trailers \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	64.40%	66.10%	64.80%	68.90%
New trailers \| Eliminations
Product Information [Line Items]
Net sales	$ (13,473)	$ (1,661)	$ (31,914)	$ (3,162)
New trailers \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	259,038	308,577	823,014	1,057,880
New trailers \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	0
Used trailers
Product Information [Line Items]
Net sales	$ 929	$ 396	$ 3,549	$ 2,884
Used trailers \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	0.20%	0.10%	0.30%	0.20%
Used trailers \| Eliminations
Product Information [Line Items]
Net sales	$ 0	$ (71)		$ (71)
Used trailers \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	0	71		71
Used trailers \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	929	396	3,549	2,884
Components, parts and services
Product Information [Line Items]
Net sales	$ 32,584	$ 31,539	$ 96,841	$ 101,622
Components, parts and services \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	8.50%	6.80%	7.90%	6.60%
Components, parts and services \| Eliminations
Product Information [Line Items]
Net sales	$ 0
Components, parts and services \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	0
Components, parts and services \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	32,584	31,539	96,841	101,622
Equipment and other
Product Information [Line Items]
Net sales	$ 102,517	$ 125,189	$ 329,811	$ 370,702
Equipment and other \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	26.90%	27.00%	27.00%	24.20%
Equipment and other \| Eliminations
Product Information [Line Items]
Net sales	$ (370)	$ (2,058)	$ (939)	$ (7,939)
Equipment and other \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	75,436	106,858	258,477	326,688
Equipment and other \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	$ 27,451	$ 20,389	$ 72,273	$ 51,953