SEGMENTS - Major Product Categories and Percentage of Consolidated Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Product Information [Line Items]
Net sales	$ 464,040	$ 632,828	$ 1,529,926	$ 1,940,400
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	$ (3,790)	$ (6,483)	$ (11,172)	$ (16,870)
Transportation Solutions
Product Information [Line Items]
Net sales	413,321	577,232	1,377,544	1,778,246
Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	415,506	582,870	1,384,639	1,791,623
Transportation Solutions \| Eliminations
Product Information [Line Items]
Net sales	2,185	5,638	7,095	13,377
Parts & Services
Product Information [Line Items]
Net sales	50,719	55,596	152,382	162,154
Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	52,324	56,441	156,459	165,647
Parts & Services \| Eliminations
Product Information [Line Items]
Net sales	1,605	845	4,077	3,493
New trailers
Product Information [Line Items]
Net sales	$ 306,916	$ 475,586	$ 1,054,718	$ 1,482,007
New trailers \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	66.10%	75.20%	68.90%	76.40%
New trailers \| Eliminations
Product Information [Line Items]
Net sales	$ (1,661)	$ (2,216)	$ (3,162)	$ (4,580)
New trailers \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	308,577	477,802	1,057,880	1,486,587
New trailers \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	0	0	0	0
Used trailers
Product Information [Line Items]
Net sales	$ 396	$ 1,340	$ 2,884	$ 2,396
Used trailers \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	0.10%	0.20%	0.20%	0.10%
Used trailers \| Eliminations
Product Information [Line Items]
Net sales	$ (71)	$ 0	$ (71)	$ 0
Used trailers \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	71	0	71	0
Used trailers \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	396	1,340	2,884	2,396
Components, parts and services
Product Information [Line Items]
Net sales	$ 31,539	$ 38,091	$ 101,622	$ 113,567
Components, parts and services \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	6.80%	6.00%	6.60%	5.90%
Components, parts and services \| Eliminations
Product Information [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0
Components, parts and services \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	0	0	0	0
Components, parts and services \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	31,539	38,091	101,622	113,567
Equipment and other
Product Information [Line Items]
Net sales	$ 125,189	$ 117,811	$ 370,702	$ 342,430
Equipment and other \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	27.00%	18.60%	24.20%	17.60%
Equipment and other \| Eliminations
Product Information [Line Items]
Net sales	$ (2,058)	$ (4,267)	$ (7,939)	$ (12,290)
Equipment and other \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	106,858	105,068	326,688	305,036
Equipment and other \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	$ 20,389	$ 17,010	$ 51,953	$ 49,684