Acquisitions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Jul. 01, 2023	Mar. 31, 2024	Mar. 31, 2023
Business Acquisition [Line Items]
Total revenue		$ 1,822,467	$ 1,636,932
Net income		(2,993)	103,713
Amortization of Intangible Assets		18,543	16,183
U.S. Xpress
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jul. 01, 2023
Total revenue		413,500
Net income		6,000
Amortization of Intangible Assets		$ 2,300
Business Combination, Acquisition Related Costs			$ 4,600