Segment Reporting - Additional Information (Detail) $ in Thousands, SquareFeet in Millions	3 Months Ended
Mar. 31, 2025 USD ($) Operators Segment Drivers Tractors Containers NumberOfOperatingLocation Trailers SquareFeet	Mar. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember
Number of reportable segments \| Segment	2
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	Our CODM uses operating income by segment to make decisions over the allocation of capital and resources and assess the performance of our segments.
Number of tractors \| Tractors	2,300
Number of drivers \| Drivers	3,300
Number of trailers \| Trailers	4,600
Number of Independent Owners \| Operators	500
Number of Containers \| Containers	50,000
Warehousing Space \| SquareFeet	7
Revenue	$ 915,216	$ 999,493
United States [Member]
Segment Reporting Information [Line Items]
Revenue	890,500	999,400
Mexico [Member]
Segment Reporting Information [Line Items]
Revenue	$ 24,700	100
Intermodal [Member]
Segment Reporting Information [Line Items]
Number of operating locations \| NumberOfOperatingLocation	32
Revenue	$ 530,022	$ 552,033

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Number of tractor.

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warehousing space.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Indicates title and position of individual or name of group identified as chief operating decision maker (CODM) for segment reporting.

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