SEGMENTS - Major Product Categories and Percentage of Consolidated Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	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, 2022	Dec. 31, 2021	Dec. 31, 2020
Product Information [Line Items]
Net sales	$ 657,449	$ 655,150	$ 642,769	$ 546,761	$ 479,277	$ 482,566	$ 449,422	$ 392,003	$ 404,078	$ 351,584	$ 339,153	$ 387,074	$ 2,502,129	$ 1,803,268	$ 1,481,889
New trailers
Product Information [Line Items]
Net sales													2,012,864	1,354,373	1,087,820
Used trailers
Product Information [Line Items]
Net sales													2,905	2,514	8,386
Components, parts and services
Product Information [Line Items]
Net sales													139,762	131,929	123,517
Equipment and other
Product Information [Line Items]
Net sales													346,598	314,452	262,166
Transportation Solutions
Product Information [Line Items]
Net sales													2,312,637	1,628,694	1,308,935
Parts & Services
Product Information [Line Items]
Net sales													189,492	174,574	172,954
Operating Segments \| Transportation Solutions
Product Information [Line Items]
Net sales													2,320,914	1,633,319	1,315,429
Operating Segments \| Transportation Solutions \| New trailers
Product Information [Line Items]
Net sales													2,012,428	1,354,375	1,087,978
Operating Segments \| Transportation Solutions \| Used trailers
Product Information [Line Items]
Net sales													0	165	3,677
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													308,486	278,779	223,774
Operating Segments \| Parts & Services
Product Information [Line Items]
Net sales													193,476	177,166	179,474
Operating Segments \| Parts & Services \| New trailers
Product Information [Line Items]
Net sales													1,722	179	3,387
Operating Segments \| Parts & Services \| Used trailers
Product Information [Line Items]
Net sales													2,905	2,349	4,709
Operating Segments \| Parts & Services \| Components, parts and services
Product Information [Line Items]
Net sales													139,762	131,929	123,517
Operating Segments \| Parts & Services \| Equipment and other
Product Information [Line Items]
Net sales													49,087	42,709	47,861
Corporate and Eliminations
Product Information [Line Items]
Net sales													(12,261)	(7,217)	(13,014)
Corporate and Eliminations \| New trailers
Product Information [Line Items]
Net sales													(1,286)	(181)	(3,545)
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													(10,975)	(7,036)	(9,469)
Corporate and Eliminations \| Transportation Solutions
Product Information [Line Items]
Net sales													8,277	4,625	6,494
Corporate and Eliminations \| Parts & Services
Product Information [Line Items]
Net sales													$ 3,984	$ 2,592	$ 6,520
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													80.40%	75.20%	73.30%
Product Concentration Risk \| Used trailers \| Sales revenue, net
Product Information [Line Items]
Percentage of consolidated net sales													0.10%	0.10%	0.60%
Product Concentration Risk \| Components, parts and services \| Sales revenue, net
Product Information [Line Items]
Percentage of consolidated net sales													5.60%	7.30%	8.30%
Product Concentration Risk \| Equipment and other \| Sales revenue, net
Product Information [Line Items]
Percentage of consolidated net sales													13.90%	17.40%	17.70%