SEGMENTS - Major Product Categories and Percentage of Consolidated Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Product Information [Line Items]
Net sales	$ 458,816	$ 550,610	$ 839,706	$ 1,065,886
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	$ (1,142)	$ (2,996)	$ (19,010)	$ (7,382)
Transportation Solutions
Product Information [Line Items]
Net sales	399,352	497,100	728,400	964,223
Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	400,214	498,705	747,017	969,133
Transportation Solutions \| Eliminations
Product Information [Line Items]
Net sales	(862)	(1,605)	(18,617)	(4,910)
Parts & Services
Product Information [Line Items]
Net sales	59,464	53,510	111,306	101,663
Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	59,744	54,901	111,699	104,135
Parts & Services \| Eliminations
Product Information [Line Items]
Net sales	(280)	(1,391)	(393)	(2,472)
New trailers
Product Information [Line Items]
Net sales	$ 312,160	$ 382,464	$ 545,535	$ 747,802
New trailers \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	68.00%	69.50%	65.00%	70.20%
New trailers \| Eliminations
Product Information [Line Items]
Net sales	$ (771)	$ (681)	$ (18,441)	$ (1,501)
New trailers \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	312,931	383,145	563,976	749,303
New trailers \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	0	0	0	0
Used trailers
Product Information [Line Items]
Net sales	$ 1,120	$ 1,144	$ 2,620	$ 2,488
Used trailers \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	0.20%	0.20%	0.30%	0.20%
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	1,120	1,144	2,620	2,488
Components, parts and services
Product Information [Line Items]
Net sales	$ 32,755	$ 34,453	$ 64,257	$ 70,083
Components, parts and services \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	7.10%	6.30%	7.70%	6.60%
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	32,755	34,453	64,257	70,083
Equipment and other
Product Information [Line Items]
Net sales	$ 112,781	$ 132,549	$ 227,294	$ 245,513
Equipment and other \| Sales Revenue, Net \| Product Concentration Risk
Product Information [Line Items]
Percentage of consolidated net sales	24.60%	24.10%	27.10%	23.00%
Equipment and other \| Eliminations
Product Information [Line Items]
Net sales	$ (371)	$ (2,315)	$ (569)	$ (5,881)
Equipment and other \| Transportation Solutions \| Operating Segments
Product Information [Line Items]
Net sales	87,283	115,560	183,041	219,830
Equipment and other \| Parts & Services \| Operating Segments
Product Information [Line Items]
Net sales	$ 25,869	$ 19,304	$ 44,822	$ 31,564