v3.26.3
Financial Information by Segment (Summary Of Financial Information By Segments) (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Segment Reporting [Line Items]        
Total revenue $ 2,200,926 $ 1,927,057 $ 6,146,861 $ 5,613,359
Salaries, wages, and benefits [1] 772,285 755,278 2,269,796 2,231,519
Fuel [1] 335,519 221,807 874,218 632,619
Operations and maintenance [1] 145,048 142,437 409,959 414,779
Insurance and claims [1] 101,497 116,497 310,818 294,003
Depreciation and amortization of property and equipment [1] 180,190 179,036 535,160 533,053
Purchased transportation [1] 328,154 284,386 928,929 827,402
Other segment items [1],[2] 159,528 177,290 505,841 490,379
Total operating expenses 2,022,221 1,876,731 5,834,721 5,423,754
Operating income $ 178,705 $ 50,326 $ 312,140 $ 189,605
Operating ratio 0.919 0.974 0.949 0.966
Non-reportable segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 126,002 $ 88,880 $ 312,768 $ 234,891
Salaries, wages, and benefits [1] 83,331 68,314 245,370 205,905
Fuel [1] 795 548 1,933 1,559
Operations and maintenance [1],[3] (13,505) (18,522) (51,752) (53,298)
Insurance and claims [1] 6,154 13,223 10,631 19,737
Depreciation and amortization of property and equipment [1] 13,267 14,716 40,705 44,985
Purchased transportation [1] (240) 4,043 11,017 9,742
Other segment items [1],[2],[3] 16,696 (5,021) 52,901 (18,101)
Total operating expenses 106,498 77,301 310,805 210,529
Operating income $ 19,504 $ 11,579 $ 1,963 $ 24,362
Operating ratio 0.845 0.870 0.994 0.896
Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Total revenue $ (31,694) $ (27,445) $ (84,827) $ (78,082)
Salaries, wages, and benefits [1] (633) (561) (1,925) (1,666)
Fuel [1] 0 0 0 0
Operations and maintenance [1] (6,318) (5,624) (17,924) (16,204)
Insurance and claims [1] (33) 0 (364) 0
Depreciation and amortization of property and equipment [1] 0 0 0 0
Purchased transportation [1] (10,180) (10,498) (25,236) (29,431)
Other segment items [1],[2] (14,530) (10,762) (39,378) (30,781)
Total operating expenses (31,694) (27,445) (84,827) (78,082)
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 $ 1,410,251 $ 1,236,634 $ 3,959,760 $ 3,643,220
Salaries, wages, and benefits [1] 438,725 447,534 1,294,552 1,326,730
Fuel [1] 271,225 185,002 712,287 527,915
Operations and maintenance [1] 126,429 129,955 366,492 375,521
Insurance and claims [1] 73,264 83,995 226,718 221,008
Depreciation and amortization of property and equipment [1] 138,227 133,612 409,608 397,493
Purchased transportation [1] 140,918 111,762 381,450 326,688
Other segment items [1],[2] 98,381 108,873 319,368 341,944
Total operating expenses 1,287,169 1,200,733 3,710,475 3,517,299
Operating income $ 123,082 $ 35,901 $ 249,285 $ 125,921
Operating ratio 0.913 0.971 0.937 0.965
LTL | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 434,517 $ 394,501 $ 1,223,029 $ 1,133,756
Salaries, wages, and benefits [1] 227,765 218,293 664,083 635,872
Fuel [1] 56,130 32,069 140,846 90,728
Operations and maintenance [1] 27,992 27,489 82,471 77,608
Insurance and claims [1] 19,785 17,419 67,756 45,922
Depreciation and amortization of property and equipment [1] 22,047 24,334 64,972 71,496
Purchased transportation [1] 9,306 6,885 23,495 23,807
Other segment items [1],[2] 46,551 69,705 136,371 158,989
Total operating expenses 409,576 396,194 1,179,994 1,104,422
Operating income $ 24,941 $ (1,693) $ 43,035 $ 29,334
Operating ratio 0.943 1.004 0.965 0.974
Logistics [Member] | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 138,974 $ 140,404 $ 406,278 $ 410,323
Salaries, wages, and benefits [1] 6,610 6,804 19,743 20,342
Fuel [1] 0 0 0 0
Operations and maintenance [1] 3,748 4,200 11,975 13,450
Insurance and claims [1] 1,106 782 2,559 3,075
Depreciation and amortization of property and equipment [1] 463 467 1,345 1,540
Purchased transportation [1] 112,077 114,749 335,467 334,701
Other segment items [1],[2] 6,549 6,565 19,318 19,688
Total operating expenses 130,553 133,567 390,407 392,796
Operating income $ 8,421 $ 6,837 $ 15,871 $ 17,527
Operating ratio 0.939 0.951 0.961 0.957
Intermodal [Member] | Operating Segments [Member]        
Segment Reporting [Line Items]        
Total revenue $ 122,876 $ 94,083 $ 329,853 $ 269,251
Salaries, wages, and benefits [1] 16,487 14,894 47,973 44,336
Fuel [1] 7,369 4,188 19,152 12,417
Operations and maintenance [1] 6,702 4,939 18,697 17,702
Insurance and claims [1] 1,221 1,078 3,518 4,261
Depreciation and amortization of property and equipment [1] 6,186 5,907 18,530 17,539
Purchased transportation [1] 76,273 57,445 202,736 161,895
Other segment items [1],[2] 5,881 7,930 17,261 18,640
Total operating expenses 120,119 96,381 327,867 276,790
Operating income $ 2,757 $ (2,298) $ 1,986 $ (7,539)
Operating ratio 0.978 1.024 0.994 1.028
[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