v3.26.1
Financial Information by Segment (Summary Of Financial Information By Segments) (Detail)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Segment Reporting [Line Items]        
Total revenue $ 2,095,712 $ 1,861,940 $ 3,945,935 $ 3,686,302
Salaries, wages, and benefits [1] 768,813 754,582 1,497,511 1,476,241
Fuel [1] 307,361 203,566 538,699 410,812
Operations and maintenance [1] 136,438 139,970 264,911 272,342
Insurance and claims [1] 100,164 85,281 209,321 177,506
Depreciation and amortization of property and equipment [1] 178,161 176,538 354,970 354,017
Purchased transportation [1] 322,147 265,722 600,775 543,016
Other segment items [1],[2] 177,777 163,665 346,313 313,089
Total operating expenses 1,990,861 1,789,324 3,812,500 3,547,023
Operating income $ 104,851 $ 72,616 $ 133,435 $ 139,279
Operating ratio 0.950 0.961 0.966 0.962
Non-reportable segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 105,564 $ 74,446 $ 186,766 $ 146,011
Salaries, wages, and benefits [1] 89,894 69,202 162,039 137,591
Fuel [1] 592 496 1,138 1,011
Operations and maintenance [1],[3] (19,455) (17,659) (38,247) (34,776)
Insurance and claims [1] 1,550 4,598 4,477 6,514
Depreciation and amortization of property and equipment [1] 13,825 14,986 27,438 30,269
Purchased transportation [1] 4,487 2,842 11,257 5,699
Other segment items [1],[2],[3] 25,104 (6,764) 36,205 (13,080)
Total operating expenses 115,997 67,701 204,307 133,228
Operating income $ (10,433) $ 6,745 $ (17,541) $ 12,783
Operating ratio 1.099 0.909 1.094 0.912
Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Total revenue $ (30,427) $ (25,759) $ (53,133) $ (50,637)
Salaries, wages, and benefits [1] (691) (600) (1,292) (1,105)
Fuel [1] 0 0 0 0
Operations and maintenance [1] (6,247) (5,606) (11,606) (10,580)
Insurance and claims [1] (36) 0 (331) 0
Depreciation and amortization of property and equipment [1] 0 0 0 0
Purchased transportation [1] (10,946) (9,515) (15,056) (18,933)
Other segment items [1],[2] (12,507) (10,038) (24,848) (20,019)
Total operating expenses (30,427) (25,759) (53,133) (50,637)
Operating income $ 0 $ 0 $ 0 $ 0
Operating ratio 1.000 1.000 1.000 1.000
Truckload [Member] | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 1,347,343 $ 1,214,036 $ 2,549,509 $ 2,406,586
Salaries, wages, and benefits [1] 431,366 447,036 855,827 879,196
Fuel [1] 250,290 169,711 441,062 342,913
Operations and maintenance [1] 123,035 126,033 240,063 245,566
Insurance and claims [1] 79,356 63,222 153,454 137,013
Depreciation and amortization of property and equipment [1] 135,830 131,021 271,381 263,881
Purchased transportation [1] 131,948 108,577 240,532 214,926
Other segment items [1],[2] 106,373 123,016 220,987 233,071
Total operating expenses 1,258,198 1,168,616 2,423,306 2,316,566
Operating income $ 89,145 $ 45,420 $ 126,203 $ 90,020
Operating ratio 0.934 0.963 0.950 0.963
LTL | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 420,148 $ 386,854 $ 788,512 $ 739,255
Salaries, wages, and benefits [1] 225,261 217,698 436,318 417,579
Fuel [1] 49,518 29,495 84,716 58,659
Operations and maintenance [1] 28,664 27,019 54,479 50,119
Insurance and claims [1] 17,339 14,973 47,971 28,503
Depreciation and amortization of property and equipment [1] 21,856 24,109 42,925 47,162
Purchased transportation [1] 9,149 9,324 14,189 16,922
Other segment items [1],[2] 46,702 45,903 89,820 89,284
Total operating expenses 398,489 368,521 770,418 708,228
Operating income $ 21,659 $ 18,333 $ 18,094 $ 31,027
Operating ratio 0.948 0.953 0.977 0.958
Logistics [Member] | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 139,696 $ 128,298 $ 267,304 $ 269,919
Salaries, wages, and benefits [1] 6,623 6,779 13,133 13,538
Fuel [1] 0 0 0 0
Operations and maintenance [1] 4,169 4,619 8,227 9,250
Insurance and claims [1] 841 715 1,453 2,293
Depreciation and amortization of property and equipment [1] 444 458 882 1,073
Purchased transportation [1] 117,533 103,957 223,390 219,952
Other segment items [1],[2] 6,259 6,223 12,769 13,123
Total operating expenses 135,869 122,751 259,854 259,229
Operating income $ 3,827 $ 5,547 $ 7,450 $ 10,690
Operating ratio 0.973 0.957 0.972 0.960
Intermodal [Member] | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 113,388 $ 84,065 $ 206,977 $ 175,168
Salaries, wages, and benefits [1] 16,360 14,467 31,486 29,442
Fuel [1] 6,961 3,864 11,783 8,229
Operations and maintenance [1] 6,272 5,564 11,995 12,763
Insurance and claims [1] 1,114 1,773 2,297 3,183
Depreciation and amortization of property and equipment [1] 6,206 5,964 12,344 11,632
Purchased transportation [1] 69,976 50,537 126,463 104,450
Other segment items [1],[2] 5,846 5,325 11,380 10,710
Total operating expenses 112,735 87,494 207,748 180,409
Operating income $ 653 $ (3,429) $ (771) $ (5,241)
Operating ratio 0.994 1.041 1.004 1.030
[1] The significant expense categories and amounts align with the segment-level information that is regularly provided to the chief operating decision maker.
[2] Other segment items for each reportable segment include operating taxes and licenses, communications, amortization of intangibles, rental expense, impairments, and other miscellaneous operating expenses.
[3] The credits within All Other Segments represent allocations within corporate to the other segments