SEGMENTS - Major Product Categories and Percentage of Consolidated Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Product Information [Line Items]
Net sales	$ 550,610	$ 686,620	$ 1,065,886	$ 1,307,572
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	$ (2,996)	$ (6,128)	$ (7,382)	$ (10,387)
Transportation Solutions
Product Information [Line Items]
Net sales	497,100	625,718	964,223	1,201,014
Transportation Solutions | Operating Segments
Product Information [Line Items]
Net sales	498,705	630,682	969,133	1,208,753
Transportation Solutions | Eliminations
Product Information [Line Items]
Net sales	1,605	4,964	4,910	7,739
Parts & Services
Product Information [Line Items]
Net sales	53,510	60,902	101,663	106,558
Parts & Services | Operating Segments
Product Information [Line Items]
Net sales	54,901	62,066	104,135	109,206
Parts & Services | Eliminations
Product Information [Line Items]
Net sales	1,391	1,164	2,472	2,648
New trailers
Product Information [Line Items]
Net sales	$ 382,464	$ 521,535	$ 747,802	$ 1,006,421
New trailers | Sales Revenue, Net | Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	69.50%	76.00%	70.20%	77.00%
New trailers | Eliminations
Product Information [Line Items]
Net sales	$ (681)	$ (2,002)	$ (1,501)	$ (2,364)
New trailers | Transportation Solutions | Operating Segments
Product Information [Line Items]
Net sales	383,145	523,537	749,303	1,008,785
New trailers | Parts & Services | Operating Segments
Product Information [Line Items]
Net sales	0	0	0	0
Used trailers
Product Information [Line Items]
Net sales	$ 1,144	$ 517	$ 2,488	$ 1,056
Used trailers | Sales Revenue, Net | Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	0.20%	0.10%	0.20%	0.10%
Used trailers | Eliminations
Product Information [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0
Used trailers | Transportation Solutions | Operating Segments
Product Information [Line Items]
Net sales	0	0	0	0
Used trailers | Parts & Services | Operating Segments
Product Information [Line Items]
Net sales	1,144	517	2,488	1,056
Components, parts and services
Product Information [Line Items]
Net sales	$ 34,453	$ 39,794	$ 70,083	$ 75,476
Components, parts and services | Sales Revenue, Net | Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	6.30%	5.80%	6.60%	5.80%
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	34,453	39,794	70,083	75,476
Equipment and other
Product Information [Line Items]
Net sales	$ 132,549	$ 124,774	$ 245,513	$ 224,619
Equipment and other | Sales Revenue, Net | Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	24.10%	18.20%	23.00%	17.20%
Equipment and other | Eliminations
Product Information [Line Items]
Net sales	$ (2,315)	$ (4,126)	$ (5,881)	$ (8,023)
Equipment and other | Transportation Solutions | Operating Segments
Product Information [Line Items]
Net sales	115,560	107,145	219,830	199,968
Equipment and other | Parts & Services | Operating Segments
Product Information [Line Items]
Net sales	$ 19,304	$ 21,755	$ 31,564	$ 32,674