Acquisition - Additional Information (Detail) - Forward Air Final Mile Acquisition [Member] $ in Millions		3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 20, 2023 USD ($) Carrier	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Business Acquisition [Line Items]
Business acquisition date	Dec. 20, 2023
Percentage of equity interests acquired	100.00%
Consideration for transaction	$ 257.2	$ 3.7
Cash consideration for business acquisition				$ 260.9
Number of network carriers | Carrier	350
Estimated fair value of intangible assets	$ 94.7
Finite-Lived Intangible Assets, Purchase Accounting Adjustments	$ 39.8
Goodwill and other intangible assets tax deductible, period	15 years
Amortization expense of intangible assets		$ 1.7	$ 4.3
Intangible assets, remaining weighted average useful life		12 years 3 months	12 years 3 months