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Segment Reporting - Summary of Financial and Operating Data by Segment (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]      
Operating revenue $ 4,202,585 $ 5,340,490 $ 4,232,383
Operating income 212,231 474,721 238,457
Depreciation and amortization 143,523 131,789 116,473
Intermodal [Member]      
Segment Reporting Information [Line Items]      
Operating revenue 2,495,663 3,312,431 2,661,160
Operating income 107,117 348,537 169,105
Depreciation and amortization 108,916 102,279 94,916
Logistics [Member]      
Segment Reporting Information [Line Items]      
Operating revenue 1,820,856 2,121,818 1,643,849
Operating income 105,114 126,184 69,352
Depreciation and amortization 34,607 29,510 21,557
Inter-segment [Member]      
Segment Reporting Information [Line Items]      
Operating revenue $ (113,934) $ (93,759) $ (72,626)