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Acquisitions - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Dec. 20, 2023
USD ($)
Carrier
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Business Acquisition [Line Items]      
Revenue   $ 999,493 $ 1,152,265
Operating income   37,139 $ 78,205
Forward Air Final Mile Acquisition [Member]      
Business Acquisition [Line Items]      
Business acquisition date Dec. 20, 2023    
Percentage of equity interests acquired 100.00%    
Consideration for transaction $ 261,000    
Number of network carriers | Carrier 350    
Goodwill and other intangible assets tax deductible, period 15 years    
Amortization expense of intangible assets   $ 2,500  
Intangible assets, remaining weighted average useful life   14 years 1 month 24 days