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Segment Reporting - Summary of Financial and Operating Data by Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]    
Operating revenue $ 915,216 $ 999,493
Purchased transportation and warehousing 657,924 740,172
Salaries and benefits 149,413 144,497
Depreciation and amortization 32,578 38,331
Insurance and claims 10,882 12,618
General and administrative 27,146 27,234
(Gain) / loss on sale of assets, net (65) (498)
Total operating expenses 877,878 962,354
Operating income 37,338 37,139
ITS [Member]    
Segment Reporting Information [Line Items]    
Operating revenue 530,022 552,033
Purchased transportation and warehousing 363,915 388,205
Salaries and benefits 89,531 85,401
Depreciation and amortization 18,950 24,057
Insurance and claims 8,899 9,842
General and administrative 8,571 6,843
Corporate allocations 26,172 25,155
(Gain) / loss on sale of assets, net (65) (501)
Total operating expenses 515,973 539,002
Operating income 14,049 13,031
Logistics [Member]    
Segment Reporting Information [Line Items]    
Operating revenue 411,001 480,224
Purchased transportation and warehousing 319,520 384,425
Salaries and benefits 34,856 34,708
Depreciation and amortization 8,286 8,821
Insurance and claims 1,591 1,785
General and administrative 4,487 5,836
Corporate allocations 18,972 20,541
(Gain) / loss on sale of assets, net 0 0
Total operating expenses 387,712 456,116
Operating income 23,289 24,108
Inter-Segment Eliminations [Member]    
Segment Reporting Information [Line Items]    
Operating revenue (25,807) (32,764)
Purchased transportation and warehousing (25,513) (32,430)
Salaries and benefits 0 0
Depreciation and amortization 0 0
Insurance and claims (294) (334)
General and administrative 0 0
Corporate allocations 0 0
(Gain) / loss on sale of assets, net 0 0
Total operating expenses (25,807) (32,764)
Operating income $ 0 $ 0