7Baggers

Knight-Swift Transportation Holdings Inc
(NYSE:KNX) 

KNX stock logo

Knight-Swift Transportation Holdings Inc., together with its subsidiaries, provides truckload transportation services in the United States, Mexico, and Canada. The company operates through three segments: Trucking, Logistics, and Intermodal. Its trucking services include irregular route, dedicated, ...

Founded: 1990
Full Time Employees: 23,600
CEO: David A. Jackson  
Sector: Industrials
Industry: Trucking

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At a glance:
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Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 
                                                                 
      revenue:
                                                                 
      revenue, excluding truckload and ltl fuel surcharge
    1,638,032,000  1,720,889,000 1,672,201,000 1,632,963,000  1,680,893,000 1,641,701,000 1,612,814,000  1,775,249,000 1,390,448,000 1,450,293,000  1,649,982,000 1,694,531,000 1,647,878,000                                             
      truckload and ltl fuel surcharge
    212,191,000  206,168,000 189,739,000 191,399,000  195,783,000 204,953,000 209,653,000  244,687,000 162,531,000 186,639,000  246,857,000 266,600,000 179,111,000                                             
      total revenue
    1,850,223,000  1,927,057,000 1,861,940,000 1,824,362,000  1,876,676,000 1,846,654,000 1,822,467,000  2,019,936,000 1,552,979,000 1,636,932,000  1,896,839,000 1,961,131,000 1,826,989,000  1,642,445,000 1,315,701,000 1,223,014,000  1,210,406,000 1,060,698,000 1,124,798,000  1,200,522,000 1,242,083,000 1,204,535,000  1,346,611,000 1,331,683,000 1,271,132,000 1,903,845,000 521,608,000                           
      yoy
    1.42%  2.68% 0.83% 0.10%  -7.09% 18.91% 11.33%  6.49% -20.81% -10.40%  15.49% 49.06% 49.38%  35.69% 24.04% 8.73%  0.82% -14.60% -6.62%  -10.85% -6.73% -5.24%  158.17%                               
      qoq
      3.50% 2.06%   1.63% 1.33%   30.07% -5.13%   -3.28% 7.34%   24.83% 7.58%   14.11% -5.70%   -3.35% 3.12%   1.12% 4.76% -33.23% 265.00%                            
      operating expenses:
                                                                 
      salaries, wages, and benefits
    728,698,000  755,278,000 754,582,000 721,659,000  726,358,000 691,878,000 692,907,000  710,543,000 533,237,000 536,742,000  559,849,000 549,956,000 536,056,000  500,673,000 377,613,000 370,370,000  376,923,000 365,311,000 354,833,000  375,491,000 380,354,000 363,855,000  381,174,000 371,405,000 361,673,000                             
      fuel
    231,338,000  221,807,000 203,566,000 207,246,000  213,489,000 222,573,000 234,589,000  272,376,000 168,300,000 187,759,000  231,128,000 257,146,000 190,489,000  146,422,000 126,055,000 118,236,000  104,703,000 86,381,000 121,855,000  148,699,000 151,309,000 138,439,000  162,832,000 162,969,000 144,816,000 212,656,000 62,300,000 94,485,000 94,961,000 92,459,000 90,464,000 87,371,000 74,987,000 90,184,000 103,023,000 116,668,000 106,907,000 133,057,000 149,099,000 153,677,000 156,022,000 150,437,000 160,561,000 144,377,000 151,882,000 152,060,000 151,726,000 145,826,000 153,003,000 463,015,000 168,537,000 150,281,000  
      operations and maintenance
    128,473,000  142,437,000 139,970,000 132,372,000  142,418,000 138,251,000 134,633,000  142,913,000 101,380,000 99,311,000  115,918,000 106,724,000 95,883,000  86,951,000 71,313,000 68,070,000  69,964,000 66,067,000 68,404,000  85,108,000 82,443,000 79,760,000  87,362,000 88,278,000 85,020,000 127,040,000 37,267,000                           
      insurance and claims
    109,157,000  116,497,000 85,281,000 92,225,000  86,510,000 105,438,000 122,446,000  148,865,000 137,306,000 138,039,000  116,493,000 102,084,000 98,192,000  73,757,000 58,776,000 55,643,000  45,186,000 45,302,000 54,280,000  46,792,000 48,796,000 50,136,000  52,701,000 53,126,000 59,148,000 74,082,000 21,117,000 52,070,000 50,176,000 51,845,000 47,372,000 45,806,000 47,710,000 40,155,000 52,877,000 42,206,000 44,307,000 45,804,000 37,673,000 33,321,000 42,448,000 41,934,000 35,110,000 29,207,000 27,771,000 25,004,000 25,707,000 26,278,000 30,580,000 67,201,000 27,876,000 22,725,000  
      operating taxes and licenses
    37,394,000  33,263,000 34,525,000 34,366,000  32,220,000 30,374,000 31,329,000  30,506,000 28,332,000 25,890,000  26,628,000 30,204,000 29,037,000  27,475,000 21,717,000 22,048,000  21,475,000 20,883,000 22,169,000  20,970,000 21,560,000 21,803,000  21,986,000 22,671,000 23,150,000 31,751,000 8,793,000 17,738,000 18,166,000 18,958,000 18,685,000 18,605,000 18,505,000 19,500,000 19,245,000 18,271,000 17,588,000 17,651,000 17,892,000 17,926,000 18,337,000 19,110,000 18,575,000 15,852,000 15,540,000 15,809,000 14,946,000 15,444,000 15,904,000 46,484,000 15,459,000 15,258,000  
      communications
    6,442,000  7,047,000 7,381,000 7,383,000  8,411,000 8,264,000 7,533,000  8,411,000 6,184,000 5,749,000  5,095,000 5,744,000 5,870,000  6,612,000 4,635,000 5,037,000  5,069,000 4,902,000 4,874,000  4,913,000 4,960,000 5,083,000  5,041,000 5,450,000 5,292,000 8,770,000 1,921,000                           
      depreciation and amortization of property and equipment
    176,809,000  179,036,000 176,538,000 177,479,000  178,598,000 178,850,000 181,865,000  176,613,000 156,381,000 155,966,000  150,363,000 147,482,000 145,044,000  138,570,000 123,606,000 119,915,000  115,664,000 114,601,000 110,221,000  106,884,000 102,938,000 100,937,000  97,708,000 95,748,000 93,863,000 150,256,000 43,477,000 62,353,000 67,769,000 68,250,000 67,245,000 64,688,000 66,951,000 67,541,000 66,852,000 60,415,000 56,927,000 55,787,000 54,369,000 54,791,000 56,175,000 56,004,000 58,254,000 52,527,000 50,332,000 49,758,000 49,288,000 50,389,000 50,394,000 152,620,000 51,553,000 50,358,000  
      amortization of intangibles
    18,902,000  19,246,000 19,246,000 19,246,000  18,922,000 18,544,000 18,543,000  18,907,000 16,505,000 16,183,000  16,254,000 16,215,000 16,166,000  15,719,000 11,984,000 11,749,000  11,473,000 11,474,000 11,474,000  10,759,000 10,692,000 10,693,000  10,695,000 10,687,000 10,509,000 10,718,000 2,654,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,203,000 4,204,000 4,204,000 4,203,000 4,215,000 4,303,000 13,641,000 4,617,000 4,727,000  
      rental expense
    45,052,000  41,647,000 43,196,000 42,866,000  42,322,000 43,930,000 42,996,000  50,401,000 16,073,000 15,068,000  15,216,000 13,492,000 13,401,000  12,002,000 13,399,000 16,864,000  19,700,000 22,372,000 25,375,000  28,726,000 32,875,000 35,545,000  39,806,000 47,703,000 52,875,000 58,836,000 15,388,000 57,385,000 55,694,000 55,932,000 57,004,000 57,070,000 56,252,000 59,592,000 59,088,000 59,846,000 61,975,000 61,781,000 59,655,000 56,135,000 51,719,000 50,447,000 46,262,000 30,541,000 29,251,000 29,973,000 28,873,000 26,576,000 23,499,000 62,617,000 19,224,000 17,989,000  
      purchased transportation
    278,628,000  284,386,000 265,722,000 277,294,000  295,261,000 286,768,000 277,257,000  330,683,000 258,259,000 280,729,000  364,394,000 384,910,000 386,446,000  352,061,000 304,157,000 258,230,000  245,102,000 200,107,000 225,276,000  251,337,000 261,273,000 269,349,000  329,338,000 335,712,000 324,283,000 466,679,000 127,434,000 275,380,000 265,511,000 285,757,000 280,041,000 283,602,000 267,309,000 297,049,000 299,866,000 294,677,000 288,811,000 333,738,000 328,112,000 340,249,000 319,169,000 337,052,000 318,321,000 257,471,000 244,817,000 265,443,000 258,855,000 252,685,000 233,202,000 665,752,000 223,680,000 194,037,000  
      impairments
    882,000  34,805,000 10,584,000 28,000  1,008,000 5,877,000 3,982,000        810,000       353,000 902,000   2,182,000      98,000 16,746,000 187,000           2,308,000       2,322,000   1,065,000     
      miscellaneous operating expenses
    59,864,000  41,282,000 48,733,000 45,535,000  49,739,000 52,447,000 53,832,000  48,662,000 36,992,000 30,709,000  30,060,000 21,396,000 11,509,000  12,116,000 11,331,000 14,593,000  29,686,000 20,778,000 23,016,000  17,890,000 34,108,000 12,636,000  13,688,000 13,692,000 16,759,000 29,809,000 11,972,000                           
      total operating expenses
    1,821,639,000  1,876,731,000 1,789,324,000 1,757,699,000  1,795,256,000 1,783,194,000 1,801,912,000  1,938,880,000 1,458,949,000 1,492,145,000  1,631,398,000 1,635,353,000 1,528,903,000  1,372,358,000 1,124,586,000 1,060,755,000  1,044,945,000 958,531,000 1,022,679,000  1,097,569,000 1,133,490,000 1,088,236,000  1,202,331,000 1,207,441,000 1,177,388,000 1,709,026,000 515,797,000 940,897,000 948,246,000 963,143,000 973,373,000 937,649,000 915,340,000 968,094,000 990,052,000 960,928,000 940,144,000 1,007,033,000 977,469,000 981,876,000 962,276,000 972,834,000 947,707,000 805,823,000 794,807,000 815,509,000 800,737,000 785,907,000 768,983,000 2,249,992,000 777,903,000 712,160,000  
      operating income
    28,584,000  50,326,000 72,616,000 66,663,000  81,420,000 63,460,000 20,555,000  81,056,000 94,030,000 144,787,000  265,441,000 325,778,000 298,086,000  270,087,000 191,115,000 162,259,000  165,461,000 102,167,000 102,119,000  102,953,000 108,593,000 116,299,000  144,280,000 124,242,000 93,744,000 194,819,000 5,811,000 52,161,000 15,585,000 75,471,000 39,853,000 74,205,000 52,483,000 121,707,000 74,921,000 98,476,000 75,000,000 132,467,000 97,411,000 94,022,000 46,170,000 102,555,000 84,420,000 92,281,000 61,987,000 107,110,000 70,357,000 86,677,000 57,902,000 233,446,000 72,567,000 46,729,000  
      yoy
    -57.12%  -38.19% 14.43% 224.32%  0.45% -32.51% -85.80%  -69.46% -71.14% -51.43%  -1.72% 70.46% 83.71%  63.23% 87.06% 58.89%  60.72% -5.92% -12.19%  -28.64% -12.60% 24.06%  2382.88% 138.19% 501.50% 158.14% -85.42% -29.71% -70.30% -37.99% -46.81% -24.65% -30.02% -8.12% -23.09% 4.74% 62.44% 29.17% 15.39% 1.89% -25.52% -4.25% 19.99% 6.47% 7.06% -54.12% -3.05% 85.49%      
      qoq
      -30.70% 8.93%   28.30% 208.73%   -13.80% -35.06%   -18.52% 9.29%   41.32% 17.78%   61.95% 0.05%   -5.19% -6.63%   16.13% 32.53% -51.88% 3252.59% -88.86% 234.69% -79.35% 89.37% -46.29% 41.39% -56.88% 62.45% -23.92% 31.30% -43.38% 35.99% 3.60% 103.64% -54.98% 21.48% -8.52% 48.87% -42.13% 52.24% -18.83% 49.70% -75.20% 221.70% 55.29%   
      operating margin %
    1.54% NaN% 2.61% 3.90% 3.65% NaN% 4.34% 3.44% 1.13% NaN% 4.01% 6.05% 8.85% NaN% 13.99% 16.61% 16.32% NaN% 16.44% 14.53% 13.27% NaN% 13.67% 9.63% 9.08% NaN% 8.58% 8.74% 9.66% NaN% 10.71% 9.33% 7.37% 10.23% 1.11% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity%  
      other (expenses) income:
                                                                 
      interest income
    1,806,000  2,690,000 3,036,000 3,034,000  4,005,000 3,817,000 5,022,000  5,542,000 5,508,000 5,049,000  1,221,000 675,000 461,000  245,000 270,000 294,000  326,000 437,000 832,000  1,007,000 977,000 1,016,000  889,000 730,000 572,000 837,000 370,000 -581,000 -488,000 -623,000 -624,000 -636,000 -751,000 -701,000 -647,000 -591,000 -587,000 -674,000 -777,000 -692,000 -766,000 -733,000 -604,000 -517,000 -573,000 -595,000 -667,000 -439,000 -397,000 -1,429,000 -471,000 -467,000  
      interest expense
    -30,729,000  -40,934,000 -40,878,000 -40,203,000  -44,398,000 -40,482,000 -41,236,000  -39,354,000 -24,354,000 -23,091,000  -14,679,000 -9,345,000 -6,680,000  -7,179,000 -3,307,000 -3,486,000  -3,232,000 -4,021,000 -6,107,000  -7,790,000 -7,156,000 -7,348,000  -7,528,000 -7,132,000 -6,764,000 -6,874,000 -1,812,000 6,862,000 7,521,000 7,053,000 7,384,000 7,567,000 8,594,000 8,723,000 9,130,000 10,109,000 10,388,000 15,014,000 20,372,000 21,453,000 23,225,000 23,815,000 24,595,000 23,760,000 25,574,000 27,613,000 28,149,000 29,553,000 32,776,000 109,342,000 36,631,000 37,501,000  
      other income
    -1,181,000  3,638,000 13,150,000 11,038,000  3,169,000 4,888,000 8,992,000        -14,405,000  4,072,000 16,840,000   7,484,000 8,499,000 -6,507,000  3,335,000 3,101,000 6,139,000  3,327,000 1,005,000 2,155,000 2,000,000 -1,442,000 -1,195,000 -1,183,000 -828,000 -1,223,000 -1,094,000 -776,000                     
      total other (expenses) income
    -30,104,000      -37,224,000 -31,777,000 -27,222,000  -22,379,000 -9,167,000 -8,339,000  -4,970,000 -34,246,000 -20,624,000  -2,862,000  12,913,000    -11,782,000                                     
      income before income taxes
    -1,520,000  15,720,000 47,924,000 40,532,000  44,196,000 31,683,000 -6,667,000  58,677,000 84,863,000 136,448,000  260,471,000 291,532,000 277,462,000  267,225,000 204,918,000 175,172,000  170,039,000 107,082,000 90,337,000  99,505,000 105,515,000 116,106,000  140,968,000 118,845,000 89,707,000 190,782,000 2,927,000 41,918,000 7,578,000 69,869,000 34,316,000 65,368,000 45,416,000 114,869,000 57,555,000 82,831,000 61,531,000 91,206,000 74,048,000 65,363,000 20,009,000 78,474,000 56,109,000 69,829,000 37,954,000 74,722,000 42,812,000 55,475,000 2,640,000 115,764,000 33,068,000 5,526,000  
      income tax expense
    -107,000  7,388,000 13,993,000 10,303,000  14,137,000 11,790,000 -3,674,000  -1,220,000 21,959,000 32,735,000  65,679,000 72,090,000 69,174,000  61,059,000 51,783,000 45,329,000  47,835,000 26,815,000 24,554,000  24,524,000 26,076,000 27,923,000  34,624,000 27,217,000 18,975,000   15,621,000 2,371,000 19,427,000 10,292,000 22,472,000 13,511,000 42,367,000 21,274,000 31,877,000 23,691,000 32,715,000 23,890,000 25,165,000 7,704,000 33,176,000 26,156,000 26,888,000  8,297,000 14,960,000 21,776,000      
      net income
    -1,413,000  8,332,000 33,931,000 30,229,000  30,059,000 19,893,000 -2,993,000  59,897,000 62,904,000 103,713,000  194,792,000 219,442,000 208,288,000  206,166,000 153,135,000 129,843,000  122,204,000 80,267,000 65,783,000  74,981,000 79,439,000 88,183,000  106,344,000 91,628,000 70,732,000 481,226,000 4,199,000 26,297,000 5,207,000 50,442,000 24,024,000 42,896,000 31,905,000 72,502,000 36,281,000 50,954,000 37,840,000 58,491,000 50,158,000 40,198,000 12,305,000 45,298,000 29,953,000 42,941,000 23,341,000 46,850,000 27,852,000 33,699,000 6,188,000 70,967,000 19,583,000 3,205,000  
      yoy
    -104.67%  -72.28% 70.57% -1109.99%  -49.82% -68.38% -102.89%  -69.25% -71.33% -50.21%  -5.52% 43.30% 60.42%  68.71% 90.78% 97.38%  62.98% 1.04% -25.40%  -29.49% -13.30% 24.67%  2432.60% 248.44% 1258.40% 854.02% -82.52% -38.70% -83.68% -30.43% -33.78% -15.81% -15.68% 23.95% -27.67% 26.76% 207.52% 29.12% 67.46% -6.39% -47.28% -3.31% 7.54% 27.43% 277.20% -33.98% 42.23% 951.45%      
      qoq
      -75.44% 12.25%   51.10% -764.65%   -4.78% -39.35%   -11.23% 5.36%   34.63% 17.94%   52.25% 22.02%   -5.61% -9.92%   16.06% 29.54% -85.30% 11360.49% -84.03% 405.03% -89.68% 109.97% -43.99% 34.45% -55.99% 99.83% -28.80% 34.66% -35.31% 16.61% 24.78% 226.68% -72.84% 51.23% -30.25% 83.97% -50.18% 68.21% -17.35% 444.59% -91.28% 262.39% 511.01%   
      net income margin %
    -0.08% NaN% 0.43% 1.82% 1.66% NaN% 1.60% 1.08% -0.16% NaN% 2.97% 4.05% 6.34% NaN% 10.27% 11.19% 11.40% NaN% 12.55% 11.64% 10.62% NaN% 10.10% 7.57% 5.85% NaN% 6.25% 6.40% 7.32% NaN% 7.90% 6.88% 5.56% 25.28% 0.81% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity%  
      net loss attributable to noncontrolling interest
    96,000  -471,000 312,000 410,000  405,000 407,000 358,000  297,000 422,000 571,000  3,000 50,000 49,000                                             
      net income attributable to knight-swift
    -1,317,000  7,861,000 34,243,000 30,639,000  30,464,000 20,300,000 -2,635,000  60,194,000 63,326,000 104,284,000  194,795,000 219,492,000 208,337,000  206,178,000 152,804,000 129,790,000  122,058,000 80,189,000 65,426,000  74,619,000 79,205,000 87,938,000  105,881,000 91,323,000 70,364,000 480,411,000 3,881,000                           
      other comprehensive income
    340,000  -96,000 -109,000 463,000  995,000 41,000 -38,000  152,000 531,000 1,090,000  243,000                                               
      comprehensive income
    -977,000  7,765,000 34,134,000 31,102,000  31,459,000 20,341,000 -2,673,000  60,346,000 63,857,000 105,374,000  195,038,000 217,630,000 207,965,000  205,300,000                                           
      earnings per share:
                                                                 
      basic
    -0.01  0.05 0.21 0.19  0.19 0.13 -0.02  0.37 0.39 0.65  1.21 1.35 1.26  1.24 0.92 0.77  0.72 0.47 0.38  0.44 0.46 0.51  0.6 0.51 0.39 4.34 0.04                           
      diluted
    -0.01  0.05 0.21 0.19  0.19 0.13 -0.02  0.37 0.39 0.64  1.21 1.35 1.25  1.23 0.92 0.77  0.71 0.47 0.38  0.44 0.46 0.51  0.6 0.51 0.39 4.3 0.04                           
      dividends declared per share:
    0.2  0.18 0.18 0.18  0.16 0.16 0.16  0.14 0.14 0.14  0.12 0.12 0.12  0.1 0.1 0.08  0.08 0.08 0.08  0.06 0.06 0.06  0.06 0.06 0.06 0.18 0.06                           
      weighted-average shares outstanding:
                                                                 
      basic
    162,426 162,188 162,305 162,131 161,974 161,738 161,861 161,689 161,511 161,188 161,332 161,116 160,915 162,260 160,665 162,365 165,377 165,860 165,966 165,577 167,478 169,711 170,205 169,948 170,617 171,541 170,504 172,078 172,971 177,018 176,849 178,451 178,160 110,657 102,846                           
      diluted
    163,135 162,611 162,647 162,541 162,457 162,173 162,233 162,111 162,086 161,826 161,888 161,940 161,900 163,211 161,572 163,166 166,499 167,060 167,106 166,585 168,374 170,549 171,028 170,624 171,282 172,142 171,290 172,724 173,608 177,999 177,750 179,398 179,241 111,697 103,752                           
      total other expenses
      -34,606,000 -24,692,000 -26,131,000                                                         
      other income (expenses)
              11,433,000 9,679,000 9,703,000  8,488,000      16,105,000                                         
      other (expenses) income
                   -25,576,000           -3,448,000 -3,078,000 -193,000                                 
      other comprehensive loss
                   -1,862,000 -372,000  -878,000                                           
      revenue, excluding truckload fuel surcharge
                      1,510,572,000                                           
      truckload fuel surcharge
                      131,873,000                                           
      net income attributable to noncontrolling interest
                      12,000 -331,000 -53,000  -146,000 -78,000 -357,000  -362,000 -234,000 -245,000  -463,000 -305,000 -368,000 -815,000 -318,000                           
      revenue, excluding trucking fuel surcharge
                       1,212,872,000 1,133,105,000  1,137,313,000 997,597,000 1,027,095,000  1,090,210,000 1,122,754,000                                  
      trucking fuel surcharge
                       102,829,000 89,909,000  73,093,000 63,101,000 97,703,000  110,312,000 119,329,000                                  
      total other income (expenses)
                       13,803,000   4,578,000 4,915,000                                      
      revenue, excluding fuel surcharge
                                1,078,138,000  1,188,743,000 1,169,748,000                              
      fuel surcharge
                                126,397,000  157,868,000 161,935,000 146,960,000 193,655,000 51,925,000                           
      merger-related costs
                                     4,178,000 12,338,000                           
      revenue before fuel surcharge
                                    1,124,172,000                             
      revenue, before fuel surcharge
                                     117,420,750 469,683,000                           
      salaries, wages and benefits
                                     38,597,500 154,390,000                           
      other income:
                                                                 
      total other income
                                     -4,037,000 -2,884,000                           
      income taxes (benefit) expense
                                     -318,000 -1,272,000                           
      operating revenue:
                                                                 
      revenue, excluding fuel surcharge revenue
                                       898,945,000 871,090,000 950,809,000 929,732,000 935,409,000 906,913,000 996,239,000 954,974,000 935,899,000 894,864,000                 
      fuel surcharge revenue
                                       94,113,000 92,741,000 87,805,000 83,494,000 76,445,000 60,910,000 93,562,000 109,999,000 123,505,000 120,280,000                 
      operating revenue
                                       993,058,000 963,831,000 1,038,614,000 1,013,226,000 1,011,854,000 967,823,000 1,089,801,000 1,064,973,000 1,059,404,000 1,015,144,000 1,139,500,000 1,074,880,000 1,075,898,000 1,008,446,000 1,075,389,000 1,032,127,000 898,104,000 856,794,000 922,619,000 871,094,000 872,584,000 826,885,000 2,483,438,000 850,470,000 758,889,000  
      salaries, wages, and employee benefits
                                       284,437,000 283,338,000 279,779,000 293,098,000 287,100,000                      
      operating supplies and expenses
                                       87,952,000 104,119,000 98,783,000 113,750,000 87,220,000 90,215,000 99,665,000 102,719,000 91,147,000 94,204,000 88,712,000 88,459,000 84,077,000 80,825,000 82,756,000 85,204,000 68,136,000 60,665,000 62,898,000 63,766,000 63,379,000 55,042,000 179,440,000 58,766,000 57,104,000  
      gain on disposal of property and equipment
                                       -3,438,000 -4,195,000 -1,376,000 -5,620,000 -4,963,000 -6,326,000 -8,466,000 -9,825,000 -10,230,000 -3,932,000 -4,583,000 -11,628,000 -8,312,000 -3,159,000 -9,054,000 -5,619,000 -4,681,000 -2,354,000 -3,466,000 -2,746,000 -3,478,000 -4,390,000 -7,774,000 -700,000 -2,255,000  
      communication and utilities
                                       8,145,000 8,503,000 7,746,000 7,130,000 6,947,000 6,900,000 8,472,000 8,236,000 7,399,000 7,499,000 7,664,000 7,321,000 7,716,000 7,170,000 6,448,000 6,679,000 5,433,000 6,092,000 6,226,000 6,154,000 5,975,000 6,246,000 19,664,000 6,335,000 6,460,000  
      other incomes
                                                                 
      merger transaction costs
                                       5,157,000 2,157,000                         
      legal settlements and reserves
                                           3,000,000                      
      total other incomes
                                       10,243,000          41,261,000 23,363,000 28,659,000 26,161,000 24,081,000 28,311,000 22,452,000 24,033,000 32,388,000 27,545,000 31,202,000 55,262,000 117,682,000 39,499,000 41,203,000  
      basic earnings per share
                                       0.2 0.04 0.38 0.18 0.32 0.23 0.51 0.25 0.36 0.27 0.41 0.35 0.28 0.09 0.32 0.21 0.31 0.17 0.33 0.2 0.24 0.04 0.51 0.14 0.02  
      diluted earnings per share
                                       0.2 0.04 0.37 0.18 0.32 0.23 0.51 0.25 0.35 0.26 0.4 0.35 0.28 0.09 0.31 0.21 0.3 0.17 0.33 0.2 0.24 0.04 0.51 0.14 0.02  
      shares used in per share calculations:
                                                                 
      basic
                                       133,544 133,147 -483 132,930 134,439 136,519 -517 142,801 142,540 142,199 149 141,557 141,308 140,981 175 140,327 139,989 139,686 139,535 139,522 139,509 -324 139,479 138,127  
      diluted
                                       134,507 134,089 -733 134,462 135,651 137,655 -570 144,132 144,212 143,955 137 143,322 143,393 143,018 279 142,315 141,838 141,259 -12 139,546 139,640 140,392 -1,053 140,716 138,900  
      total other incomes (income)
                                        8,007,000   8,837,000 7,067,000 6,838,000 17,366,000  13,469,000                 
      other expenses
                                                                 
      derivative interest expense
                                              68,000 1,111,000 2,793,000 1,468,000 1,756,000 1,618,000 1,653,000 1,293,000 1,465,000 532,000 562,000  448,000 2,108,000 2,545,000 11,054,000 4,003,000 4,680,000  
      loss on debt extinguishment
                                              9,567,000   27,152,000 2,854,000 6,990,000 2,913,000  496,000  5,044,000   1,279,000 20,940,000     
      non-cash impairments of non-operating assets
                                                1,480,000                 
      total other expenses (income)
                                         5,602,000 5,537,000     15,645,000                  
      salaries, wages and employee benefits
                                            288,633,000 290,199,000 283,767,000 276,326,000 261,654,000 263,219,000 240,005,000 238,093,000 229,366,000 233,497,000 220,156,000 202,757,000 206,607,000 205,278,000 199,965,000 198,618,000 200,135,000 587,332,000 202,556,000 195,476,000  
      legal settlement
                                               6,000,000                  
      other
                                             -585,250 -752,000 -984,000 -605,000 -1,699,000 -842,000 -710,000 -864,000 -876,000 -1,174,000 -1,323,000 -496,000 -609,000 -385,000 -1,299,000 -602,000 -1,285,000 -664,000 -511,000  
      merger and acquisition expense
                                                     582,000 4,331,000           
      gain on sale of real property
                                                      -798,000  -6,078,000         
      other incomes:
                                                                 
      shares used in per share calculations
                                                                 
      basic
                                       133,544 133,147 -483 132,930 134,439 136,519 -517 142,801 142,540 142,199 149 141,557 141,308 140,981 175 140,327 139,989 139,686 139,535 139,522 139,509 -324 139,479 138,127  
      diluted
                                       134,507 134,089 -733 134,462 135,651 137,655 -570 144,132 144,212 143,955 137 143,322 143,393 143,018 279 142,315 141,838 141,259 -12 139,546 139,640 140,392 -1,053 140,716 138,900  
      income tax benefit
                                                        14,613,000     44,797,000 13,485,000 2,321,000  
      income tax (benefit) expense
                                                            -3,548,000     
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 
                                                                   
        assets
                                                                   
        current assets:
                                                                   
        cash and cash equivalents
      222,774,000 220,420,000 192,677,000 216,320,000 209,480,000 218,261,000 166,348,000 186,473,000 204,762,000 168,545,000 193,372,000 228,957,000 191,245,000 196,770,000 194,082,000 198,021,000 242,860,000 261,001,000 269,694,000 179,032,000 194,650,000 156,699,000 240,236,000 117,760,000 119,132,000 159,722,000 93,996,000 55,063,000 60,215,000 82,486,000 91,335,000 115,494,000 79,184,000 76,649,000 136,422,000 42,884,000 61,770,000 89,391,000 71,258,000 118,132,000 142,724,000 107,590,000 53,706,000 53,651,000 68,736,000 105,132,000 70,296,000 73,528,000 46,098,000 59,178,000 51,429,000 43,510,000 38,746,000 53,596,000 43,321,000 35,515,000 47,684,000 40,177,000 44,656,000 21,549,000 47,494,000 
        cash and cash equivalents – restricted
      70,447,000 82,381,000 101,677,000 123,052,000 135,152,000 147,684,000 150,870,000 149,571,000 136,174,000 297,275,000 259,979,000 251,438,000 204,348,000 185,792,000 144,960,000 111,449,000 128,774,000 87,241,000 68,019,000 51,637,000 47,867,000 39,328,000 36,689,000 39,583,000 39,812,000 41,331,000 40,831,000 51,602,000 50,689,000  48,460,000 50,714,000    58,994,000 54,945,000  59,487,000 55,109,000                      
        trade receivables, net of allowance
      425,522,000 305,324,000 864,539,000 848,282,000 867,258,000 803,696,000 835,248,000 841,619,000 867,610,000 888,603,000 971,175,000 712,197,000 800,415,000 842,294,000 944,060,000 1,010,768,000 939,704,000 911,336,000 830,402,000 648,435,000 584,011,000 578,479,000 559,657,000 522,075,000 521,976,000 518,547,000 513,906,000 549,668,000 555,930,000 616,830,000 625,293,000 598,850,000 589,983,000 574,265,000 545,588,000                           
        contract balance – revenue in transit
      12,570,000 9,642,000 8,687,000 11,110,000 9,123,000 7,238,000 11,056,000 14,267,000 13,622,000 12,246,000 12,122,000 13,608,000 15,097,000 15,859,000 19,605,000 20,422,000 21,185,000 22,936,000 22,950,000 20,913,000 20,104,000 14,560,000 20,233,000 14,679,000 13,239,000 12,696,000 17,332,000 20,526,000                                  
        prepaid expenses
      96,815,000 113,985,000 116,851,000 112,699,000 124,984,000 123,089,000 114,793,000 112,998,000 137,105,000 148,696,000 132,594,000 100,896,000 105,429,000 108,081,000 93,292,000 79,405,000 86,742,000 90,507,000 76,697,000 58,722,000 66,278,000 71,649,000 61,686,000 54,515,000 59,134,000 62,160,000 73,052,000 67,904,000 74,707,000 67,011,000 66,814,000 58,438,000 62,212,000 58,525,000 65,004,000                           
        assets held for sale
      61,599,000 72,985,000 69,295,000 70,857,000 62,303,000 82,993,000 74,787,000 72,480,000 78,918,000 83,366,000 77,008,000 59,310,000 48,259,000 40,602,000 16,318,000 11,195,000 11,421,000 8,166,000 20,330,000 17,599,000 20,835,000 29,756,000 38,098,000 39,641,000 37,986,000 41,786,000 57,395,000 43,479,000 32,332,000 39,955,000 48,583,000 36,274,000 30,444,000 25,153,000 24,891,000 1,652,000 5,333,000 6,969,000 11,830,000 7,561,000 9,692,000 9,084,000 11,096,000 8,049,000 3,438,000 2,907,000 5,752,000 8,694,000 18,389,000 19,268,000 9,897,000 16,752,000 16,011,000 31,544,000 14,982,000 13,307,000 21,329,000 13,058,000 11,526,000 12,234,000 8,862,000 
        income tax receivable
      36,161,000 45,895,000 79,376,000 28,016,000 13,523,000 37,260,000 46,191,000 39,266,000 58,273,000 65,815,000 60,211,000 17,303,000 30,221,000 58,974,000 15,100,000 6,880,000 217,000 909,000 46,899,000 29,369,000 31,000 2,903,000 8,358,000 5,902,000 12,646,000 17,026,000 42,538,000 35,437,000 1,399,000 6,943,000 41,236,000 30,036,000 26,841,000 55,114,000 39,850,000                           
        other current assets
      28,973,000 36,894,000 35,181,000 33,682,000 33,034,000 28,520,000 38,330,000 33,541,000 35,707,000 43,939,000 53,684,000 53,662,000 43,546,000 38,025,000 39,103,000 27,421,000 27,064,000 26,318,000 62,334,000 60,581,000 21,015,000 20,988,000 24,544,000 27,073,000 25,681,000 27,848,000 51,884,000 34,356,000 26,550,000 29,706,000 29,611,000 30,028,000 23,684,000 23,945,000 24,419,000                       13,738,000 12,303,000   
        total current assets
      954,861,000 887,526,000 1,468,283,000 1,444,018,000 1,454,857,000 1,448,741,000 1,437,623,000 1,450,215,000 1,532,171,000 1,709,015,000 1,761,173,000 1,885,110,000 1,442,636,000 1,493,572,000 1,474,347,000 1,473,417,000 1,466,269,000 1,414,280,000 1,404,465,000 1,074,877,000 963,745,000 923,363,000 998,553,000 829,500,000 838,442,000 890,028,000 900,968,000 868,312,000 813,462,000 907,232,000 971,843,000 941,332,000 895,501,000 923,207,000 927,855,000 598,326,000 615,307,000 655,551,000 653,922,000 693,504,000 727,912,000 705,607,000 725,415,000 714,702,000 720,785,000 800,408,000 743,864,000 752,423,000 734,520,000 734,032,000 728,101,000 613,147,000 666,901,000 674,537,000 644,823,000 605,223,000 645,960,000 573,588,000 594,622,000 534,498,000 512,316,000 
        gross property and equipment
      7,401,723,000 7,380,056,000 7,327,009,000 7,134,871,000 7,109,564,000 7,104,514,000 7,081,485,000 6,917,535,000 6,782,857,000 6,720,610,000 6,542,804,000 5,980,256,000 5,840,683,000 5,740,383,000 5,543,221,000 5,368,062,000 5,235,593,000  4,933,669,000 4,401,293,000 4,286,833,000  4,112,703,000 3,947,597,000 3,838,947,000  3,671,073,000 3,546,930,000 3,377,112,000                                 
        less: accumulated depreciation and amortization
      -2,741,867,000 -2,662,331,000 -2,571,761,000 -2,518,802,000 -2,484,008,000 -2,401,129,000 -2,322,511,000 -2,292,930,000 -2,205,709,000 -2,104,211,000 -2,038,345,000 -2,018,107,000 -1,960,593,000 -1,905,340,000 -1,867,896,000 -1,766,873,000 -1,655,908,000 -1,563,533,000 -1,477,334,000 -1,389,477,000 -1,311,189,000 -1,230,696,000 -1,142,138,000 -1,053,027,000 -965,777,000 -892,019,000 -824,144,000 -801,287,000 -753,389,000 -693,107,000 -643,030,000 -592,304,000 -532,056,000 -462,922,000 -399,681,000 -1,286,656,000 -1,271,973,000 -1,244,890,000 -1,200,613,000 -1,176,562,000 -1,152,843,000 -1,128,499,000 1,092,987,000 1,049,974,000 1,017,060,000 978,305,000 946,640,000 950,480,000 951,521,000 922,665,000 942,646,000 864,903,000 851,026,000 819,803,000 804,786,000 802,347,000 787,164,000 747,825,000 730,563,000 699,342,000 660,497,000 
        property and equipment
      4,659,856,000 4,717,725,000 4,755,248,000 4,616,069,000 4,625,556,000 4,703,385,000 4,758,974,000 4,624,605,000 4,577,148,000 4,616,399,000 4,504,459,000 3,962,149,000 3,880,090,000 3,835,043,000 3,675,325,000 3,601,189,000 3,579,685,000 3,555,364,000 3,456,335,000 3,011,816,000 2,975,644,000 2,992,652,000 2,970,565,000 2,894,570,000 2,873,170,000 2,850,720,000 2,846,929,000 2,745,643,000 2,623,723,000 2,612,837,000 3,200,826,000 2,995,795,000 2,345,863,000 2,384,221,000 2,296,587,000                           
        operating lease right-of-use-assets
      316,960,000 314,571,000 297,060,000 322,710,000 366,559,000 372,841,000 415,856,000 422,433,000 443,002,000 484,821,000 505,795,000 200,708,000 197,950,000 192,358,000 160,920,000 165,643,000 141,363,000 147,540,000 102,230,000 91,258,000 95,658,000 113,296,000    169,425,000                                    
        goodwill
      3,934,741,000 3,934,741,000 3,962,142,000 3,962,142,000 3,962,142,000 3,962,142,000 3,963,142,000 3,879,442,000 3,873,131,000 3,848,798,000 3,844,252,000 3,519,339,000 3,519,339,000 3,519,339,000 3,518,589,000 3,518,589,000 3,518,589,000 3,515,135,000 3,461,898,000 2,971,023,000 2,958,709,000 2,922,964,000 2,922,967,000 2,922,970,000 2,923,382,000 2,918,992,000 2,918,995,000 2,919,219,000 2,919,222,000 2,919,176,000 2,919,528,000 2,917,584,000 2,910,101,000 2,887,867,000 2,989,270,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 253,256,000 
        intangible assets
      1,916,594,000 1,935,699,000 1,970,565,000 2,018,606,000 2,037,848,000 2,057,044,000 2,075,315,000 2,021,838,000 2,040,339,000 2,058,882,000 2,077,426,000 1,744,056,000 1,760,561,000 1,776,569,000 1,782,452,000 1,798,668,000 1,814,883,000 1,831,049,000 1,793,924,000 1,403,483,000 1,393,346,000 1,389,245,000 1,400,719,000 1,412,192,000 1,423,666,000 1,379,459,000 1,391,157,000 1,399,534,000 1,410,227,000 1,420,919,000 1,431,612,000 1,442,707,000 1,453,395,000 1,440,903,000 1,285,571,000 257,898,000 262,101,000 266,305,000 270,508,000 274,712,000 278,915,000 283,119,000 287,322,000 291,526,000 295,729,000 299,933,000 304,136,000 308,340,000 312,543,000 316,747,000 320,950,000 325,154,000 329,357,000 333,561,000 337,765,000 341,968,000 346,183,000 354,891,000 359,400,000 364,017,000 368,744,000 
        other long-term assets
      163,744,000 165,174,000 165,425,000 159,890,000 159,110,000 154,379,000 173,871,000 171,792,000 163,079,000 152,850,000 147,176,000 126,530,000 142,428,000 134,785,000 135,734,000 157,372,000 175,017,000 192,132,000 136,130,000 130,002,000 132,373,000 126,482,000 89,207,000 82,843,000 70,380,000 73,108,000 71,672,000 59,850,000 61,608,000 51,721,000 51,287,000 48,627,000                              
        total assets
      11,946,756,000 11,955,436,000 12,618,723,000 12,523,435,000 12,606,072,000 12,698,532,000 12,824,781,000 12,570,325,000 12,628,870,000 12,870,765,000 12,840,281,000 11,437,892,000 10,943,004,000 10,951,666,000 10,747,367,000 10,714,878,000 10,695,806,000 10,655,500,000 10,354,982,000 8,682,459,000 8,519,475,000 8,468,002,000 8,501,361,000 8,279,028,000 8,288,323,000 8,281,732,000 8,322,225,000 8,213,584,000 8,081,142,000 7,911,885,000 7,932,066,000 7,753,741,000 7,656,086,000 7,683,442,000 7,547,808,000 2,590,688,000 2,637,206,000 2,745,666,000 2,754,224,000 2,772,866,000 2,867,501,000 2,922,435,000 2,974,174,000 2,909,012,000 2,876,923,000 2,937,582,000 2,832,237,000 2,815,106,000 2,820,016,000 2,809,008,000 2,864,425,000 2,642,725,000 2,639,907,000 2,632,178,000 2,615,720,000 2,572,872,000 2,599,492,000 2,544,167,000 2,591,610,000 2,555,680,000 2,567,895,000 
        liabilities and stockholders’ equity
                                                                   
        current liabilities:
                                                                   
        accounts payable
      255,924,000 200,835,000 251,567,000 301,867,000 325,573,000 329,697,000 293,244,000 300,585,000 283,837,000 355,173,000 299,039,000 223,482,000 214,574,000 220,849,000 229,555,000 220,469,000 248,762,000 224,844,000 177,634,000 151,704,000 126,918,000 101,001,000 140,228,000 128,731,000 168,018,000 99,194,000 145,155,000 165,085,000 158,646,000 117,883,000 164,938,000 141,465,000 112,308,000 119,867,000 198,168,000 133,731,000 114,147,000 115,063,000 138,087,000 121,116,000 118,605,000 121,827,000 136,551,000 123,438,000 162,226,000 160,186,000 165,734,000 141,889,000 174,397,000 118,014,000 152,475,000 122,582,000 123,738,000 103,070,000 112,504,000 98,796,000 106,306,000 90,525,000 97,855,000 92,245,000 90,220,000 
        accrued payroll and purchased transportation
      169,390,000 194,910,000 213,761,000 202,969,000 178,632,000 194,875,000 190,830,000 183,858,000 153,996,000 164,884,000 183,450,000 159,066,000 154,471,000 171,381,000 200,871,000 245,679,000 237,909,000 217,084,000 227,016,000 191,906,000 182,106,000 160,888,000 154,025,000 109,398,000 112,396,000 110,065,000 116,610,000 112,949,000 118,063,000 126,464,000 132,937,000 126,388,000 117,002,000 107,017,000 86,213,000                           
        accrued liabilities
      55,849,000 66,638,000 58,337,000 72,865,000 76,025,000 64,100,000 207,143,000 197,801,000 224,749,000 220,350,000 228,465,000 81,766,000 81,952,000 81,528,000 98,513,000 124,072,000 188,008,000 128,536,000 134,002,000 87,637,000 143,168,000 88,894,000 112,189,000 95,863,000 87,480,000 175,222,000 162,913,000 154,197,000 167,813,000 151,500,000 153,437,000 155,249,000 187,859,000 186,076,000 213,313,000 142,405,000 163,033,000 132,712,000 132,918,000 116,708,000 111,458,000 97,313,000 105,370,000 114,171,000 110,947,000 100,329,000 120,018,000 127,177,000 119,053,000 110,745,000 123,985,000 99,972,000 105,022,000 96,439,000 110,585,000 100,083,000 103,063,000 112,635,000 104,044,000 111,872,000 80,455,000 
        claims accruals – current portion
      267,702,000 246,882,000 268,831,000 247,566,000 247,191,000 249,953,000 336,010,000 358,553,000 350,030,000 480,200,000 442,014,000 366,238,000 342,530,000 311,822,000 271,111,000 240,021,000 223,382,000 206,607,000 200,159,000 169,093,000 174,678,000 174,928,000 174,136,000 168,012,000 158,962,000 150,805,000 146,990,000 153,768,000 155,394,000 160,044,000 165,490,000 152,243,000 154,190,000 147,285,000 147,922,000                           
        finance lease liabilities and long-term debt – current portion
      486,021,000 194,406,000 204,731,000 249,526,000 266,788,000 288,428,000 272,355,000 485,907,000 505,841,000 459,759,000 434,863,000 73,304,000 72,875,000 71,466,000 76,684,000 235,775,000 234,146,000 262,423,000 78,266,000 72,423,000 85,035,000 52,583,000 422,655,000 403,738,000 377,201,000 377,651,000 36,719,000 58,684,000 52,893,000                                 
        operating lease liabilities – current portion
      124,228,000 127,538,000 107,952,000 111,091,000 120,343,000 120,715,000 129,938,000 123,396,000 124,840,000 144,921,000 142,543,000 41,565,000 39,409,000 36,961,000 35,618,000 37,787,000 33,822,000 35,322,000 35,464,000 32,785,000 37,577,000 47,496,000 57,088,000 65,741,000 75,224,000 80,101,000 88,371,000 98,904,000 109,158,000                                 
        total current liabilities
      1,359,114,000 1,031,209,000 1,105,179,000 1,625,012,000 1,648,608,000 1,706,751,000 1,429,520,000 1,650,100,000 1,643,293,000 1,825,287,000 1,730,374,000 945,421,000 905,811,000 894,007,000 912,352,000 1,103,803,000 1,166,029,000 1,074,816,000 852,541,000 705,548,000 948,439,000 839,708,000 1,262,199,000 971,483,000 979,281,000 993,038,000 696,758,000 743,587,000 761,967,000 614,563,000 680,357,000 641,221,000 618,356,000 609,550,000 700,506,000 412,024,000 429,377,000 409,573,000 422,270,000 400,356,000 374,750,000 398,945,000 663,994,000 397,646,000 429,307,000 422,222,000 452,514,000 436,298,000 459,939,000 384,368,000 432,863,000 370,290,000 370,670,000 323,293,000 337,206,000 319,129,000 382,944,000 330,863,000 335,534,000 329,944,000 326,184,000 
        revolving line of credit
      658,000,000 626,000,000 707,000,000 297,000,000 280,000,000 232,000,000 227,000,000 120,000,000 202,000,000 67,000,000 300,000,000 210,000,000  43,000,000 146,000,000 129,000,000 165,000,000 260,000,000 300,000,000 55,000,000 115,000,000 210,000,000 170,000,000 235,000,000 294,000,000 279,000,000 290,000,000 270,000,000 60,000,000 195,000,000 235,000,000 120,000,000 55,000,000 125,000,000 85,000,000  10,000,000 130,000,000 50,000,000 85,000,000 200,000,000 200,000,000 200,000,000   57,000,000 82,000,000 99,000,000  17,000,000 62,000,000           
        long-term debt – less current portion
      706,023,000 1,027,793,000 1,052,969,000 1,392,325,000 1,412,548,000 1,445,313,000 1,501,565,000 1,173,121,000 1,193,602,000 1,223,021,000 1,261,711,000 1,265,204,000 1,016,261,000 1,024,668,000 1,028,014,000 1,028,617,000 1,029,159,000 1,037,552,000 1,238,022,000 299,219,000 299,063,000 298,907,000     364,766,000 364,707,000 364,649,000 364,590,000 364,531,000 364,473,000 364,411,000 364,771,000 399,719,000                           
        finance lease liabilities – less current portion
      475,534,000 502,042,000 479,883,000 415,895,000 440,520,000 457,303,000 466,863,000 434,405,000 375,666,000 407,150,000 320,270,000 333,009,000 335,582,000 344,377,000 348,594,000 327,320,000 277,839,000 256,166,000 208,556,000 165,644,000 127,341,000 138,243,000 87,253,000 48,179,000 55,679,000 57,383,000 59,048,000 66,027,000 68,215,000                                 
        operating lease liabilities – less current portion
      212,925,000 207,788,000 209,788,000 230,369,000 259,315,000 274,549,000 310,584,000 326,752,000 342,320,000 371,407,000 394,921,000 153,765,000 153,336,000 149,992,000 121,028,000 123,274,000 103,161,000 107,614,000 69,401,000 60,958,000 62,549,000 69,852,000 67,067,000 76,266,000 89,683,000 96,160,000 111,568,000 129,680,000 151,634,000                                 
        claims accruals – less current portion
      374,188,000 359,546,000 340,981,000 337,359,000 344,379,000 335,880,000 328,968,000 313,856,000 303,743,000 315,476,000 310,075,000 205,605,000 196,045,000 201,838,000 208,055,000 206,418,000 202,737,000 210,714,000 200,493,000 168,152,000 174,766,000 174,814,000 175,915,000 186,317,000 188,912,000 196,912,000 199,745,000 196,929,000 207,417,000 201,327,000 197,130,000 213,101,000 212,804,000 206,144,000 204,203,000                           
        deferred tax liabilities
      893,960,000 904,075,000 941,123,000 885,917,000 897,380,000 919,814,000 920,685,000 910,882,000 930,629,000 951,749,000 959,306,000 899,891,000 906,577,000 907,893,000 878,167,000 874,601,000 881,287,000 874,877,000 856,926,000 806,398,000 797,019,000 815,941,000 802,292,000 792,839,000 785,588,000 771,719,000 774,683,000 749,077,000 730,516,000 739,538,000 726,409,000 684,595,000 671,111,000 679,077,000 909,941,000                           
        other long-term liabilities
      203,693,000 205,117,000 205,540,000 206,640,000 200,517,000 210,117,000 114,469,000 118,817,000 111,828,000 79,086,000 72,142,000 5,313,000 10,197,000 12,049,000 9,895,000 11,994,000 11,112,000 11,828,000 45,175,000 45,115,000 45,960,000 48,497,000 55,387,000 38,515,000 25,055,000 14,455,000 15,641,000 16,873,000 17,476,000 23,294,000 24,200,000 25,665,000                              
        total liabilities
      4,883,437,000 4,863,570,000 5,497,663,000 5,390,517,000 5,483,267,000 5,581,727,000 5,758,565,000 5,499,972,000 5,556,648,000 5,766,684,000 5,710,480,000 4,356,849,000 3,907,410,000 3,996,385,000 3,930,754,000 4,083,621,000 4,114,863,000 4,112,050,000 4,049,542,000 2,584,406,000 2,570,137,000 2,595,962,000 2,620,113,000 2,513,439,000 2,597,999,000 2,613,429,000 2,716,932,000 2,681,564,000 2,536,519,000 2,449,166,000 2,535,880,000 2,357,357,000 2,346,894,000 2,443,072,000 2,749,552,000 1,875,548,000 1,955,412,000 2,073,411,000 2,141,985,000 2,164,279,000 2,260,564,000 2,305,308,000 2,361,904,000 2,336,918,000 2,362,318,000 2,467,288,000 2,429,753,000 2,467,298,000 2,517,763,000 2,525,421,000 2,629,591,000 2,338,724,000 2,383,197,000 2,402,067,000 2,432,913,000 2,440,579,000 2,503,726,000 2,498,178,000 2,577,310,000 2,565,448,000 2,651,066,000 
        commitments and contingencies
                                                                   
        stockholders’ equity:
                                                                   
        preferred stock, par value 0.01 per share...
                                                                   
        common stock, par value 0.01 per share...
      1,625,000 1,623,000 1,624,000 1,623,000 1,620,000 1,619,000 1,619,000 1,618,000 1,616,000 1,613,000 1,613,000 1,613,000 1,610,000 1,607,000 1,607,000 1,606,000 1,636,000 1,660,000 1,660,000 1,657,000 1,655,000 1,665,000 1,702,000 1,701,000 1,698,000 1,707,000 1,705,000 1,703,000 1,730,000                                 
        additional paid-in capital
      4,489,172,000 4,480,725,000 4,473,069,000 4,464,204,000 4,454,631,000 4,446,726,000 4,439,029,000 4,439,489,000 4,430,736,000 4,426,852,000 4,418,981,000 4,412,069,000 4,401,276,000 4,392,266,000 4,382,895,000 4,372,916,000 4,360,889,000 4,350,913,000 4,344,894,000 4,325,915,000 4,309,792,000 4,301,424,000 4,294,504,000 4,287,293,000 4,275,834,000 4,269,043,000 4,263,039,000 4,254,297,000 4,248,188,000 4,242,369,000 4,236,923,000 4,232,672,000 4,225,661,000 4,219,214,000 4,212,609,000 695,276,000 688,234,000 701,065,000 690,317,000 699,576,000 725,049,000 754,589,000 795,600,000 791,776,000 786,455,000 781,124,000 772,908,000 769,400,000 764,958,000 759,408,000 756,620,000 903,626,000 899,503,000 896,575,000 895,976,000 894,754,000 893,318,000 890,735,000 890,066,000 887,497,000 822,140,000 
        accumulated other comprehensive loss
      -376,000 -716,000 -184,000 -88,000  -442,000  -827,000 -868,000 -830,000 -664,000 -815,000 -1,346,000 -2,436,000 -2,554,000 -2,797,000 -935,000 -563,000 -878,000                           -2,336,000 -3,434,000 -4,443,000 -5,354,000 -6,162,000 -6,826,000 -7,342,000 -7,566,000 -7,894,000 -7,748,000 -7,824,000 -9,216,000 -13,410,000 -13,480,000 -15,396,000 -20,076,000 
        retained earnings
      2,563,347,000 2,600,822,000 2,637,231,000 2,658,937,000 2,658,598,000 2,661,064,000 2,617,880,000 2,613,684,000 2,624,666,000 2,659,755,000 2,693,568,000 2,657,415,000 2,623,373,000 2,553,567,000 2,424,469,000 2,249,333,000 2,209,104,000 2,181,142,000 1,946,984,000 1,757,689,000 1,625,397,000 1,566,759,000 1,582,814,000 1,474,466,000 1,410,527,000 1,395,465,000 1,338,374,000 1,274,067,000 1,292,838,000 1,216,852,000 1,154,988,000 1,159,687,000 1,079,543,000 1,016,738,000 581,382,000 18,423,000                          
        total knight-swift stockholders' equity
      7,053,768,000 7,082,454,000 7,111,740,000 7,124,676,000 7,114,870,000 7,108,967,000 7,058,696,000 7,053,964,000 7,056,150,000 7,087,390,000 7,113,498,000 7,070,282,000 7,024,913,000 6,945,004,000 6,806,417,000 6,621,058,000 6,570,694,000 6,533,152,000 6,292,660,000 6,085,261,000 5,936,844,000 5,869,848,000 5,879,020,000 5,763,460,000 5,688,059,000 5,666,215,000 5,603,118,000 5,530,067,000 5,542,756,000 5,460,949,000 5,393,667,000 5,394,145,000 5,306,987,000 5,237,732,000 4,795,770,000                           
        noncontrolling interest
      9,551,000 9,412,000 9,320,000 8,242,000 7,935,000 7,838,000 7,520,000 16,389,000 16,072,000 16,691,000 16,303,000 10,761,000 10,681,000 10,277,000 10,196,000 10,199,000 10,249,000 10,298,000 12,780,000 12,792,000 12,494,000 2,192,000 2,228,000 2,129,000 2,265,000 2,088,000 2,175,000 1,953,000 1,867,000 1,770,000 2,519,000 2,239,000 2,205,000 2,638,000 2,486,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 102,000 202,000 202,000 202,000   202,000   202,000 102,000 
        total stockholders’ equity
      7,063,319,000 7,091,866,000 7,121,060,000 7,132,918,000 7,122,805,000 7,116,805,000 7,066,216,000 7,070,353,000 7,072,222,000 7,104,081,000 7,129,801,000 7,081,043,000 7,035,594,000 6,955,281,000 6,816,613,000 6,631,257,000 6,580,943,000 6,543,450,000 6,305,440,000 6,098,053,000 5,949,338,000 5,872,040,000 5,881,248,000 5,765,589,000 5,690,324,000 5,668,303,000 5,605,293,000 5,532,020,000 5,544,623,000 5,462,719,000 5,396,186,000 5,396,384,000 5,309,192,000 5,240,370,000 4,798,256,000 715,140,000 681,794,000 672,255,000 612,239,000 608,587,000 606,937,000 617,127,000 612,270,000 572,094,000 514,605,000 470,294,000 402,484,000 347,808,000 302,253,000 283,587,000 234,834,000 304,001,000 256,710,000 230,111,000 182,807,000 132,293,000 95,766,000 45,989,000 14,300,000   
        total liabilities and stockholders’ equity
      11,946,756,000 11,955,436,000 12,618,723,000 12,523,435,000 12,606,072,000 12,698,532,000 12,824,781,000 12,570,325,000 12,628,870,000 12,870,765,000 12,840,281,000 11,437,892,000 10,943,004,000 10,951,666,000 10,747,367,000 10,714,878,000 10,695,806,000 10,655,500,000 10,354,982,000 8,682,459,000 8,519,475,000 8,468,002,000 8,501,361,000 8,279,028,000 8,288,323,000 8,281,732,000 8,322,225,000 8,213,584,000 8,081,142,000 7,911,885,000 7,932,066,000 7,753,741,000 7,656,086,000 7,683,442,000 7,547,808,000 2,590,688,000 2,637,206,000 2,745,666,000 2,754,224,000 2,772,866,000 2,867,501,000 2,922,435,000 2,974,174,000 2,909,012,000 2,876,923,000 2,937,582,000 2,832,237,000 2,815,106,000 2,820,016,000 2,809,008,000 2,864,425,000 2,642,725,000 2,639,907,000 2,632,178,000 2,615,720,000 2,572,872,000 2,599,492,000 2,544,167,000 2,591,610,000   
        property and equipment:
                                                                   
        revenue equipment
       5,567,718,000    5,356,602,000    5,154,593,000    4,429,117,000    3,994,519,000    3,417,194,000    3,007,774,000    2,617,989,000   2,217,814,000 2,197,158,000 2,050,343,000                           
        land and land improvements
       456,186,000    460,629,000    426,635,000    376,552,000    326,731,000    236,517,000    228,546,000    227,581,000   219,726,000 216,676,000 216,509,000                           
        buildings and building improvements
       1,017,448,000    976,354,000    861,194,000    726,424,000    639,990,000    458,464,000    406,105,000    375,435,000   356,508,000 357,409,000 357,357,000                           
        furniture and fixtures
       201,497,000    172,470,000    156,911,000    131,886,000    97,102,000    69,250,000    61,567,000    51,619,000   50,659,000 43,131,000 40,093,000                           
        shop and service equipment
       95,050,000    99,266,000    84,049,000    59,817,000    46,640,000    29,033,000    26,417,000    22,771,000   23,221,000 22,864,000 22,437,000                           
        leasehold improvements
       42,157,000    39,193,000    37,228,000    16,587,000    13,915,000    12,890,000    12,330,000    10,549,000   9,991,000 9,905,000 9,529,000                           
        accounts receivable securitization – current portion
         439,128,000 434,056,000 458,983,000               198,957,000 213,918,000 201,878,000                                       
        accounts receivable securitization
        455,200,000    458,911,000 452,039,000 453,567,000 526,508,000 361,681,000 338,641,000 383,601,000 418,561,000 278,649,000 278,594,000        164,840,000 179,801,000 204,762,000 204,723,000 144,684,000 174,645,000 239,606,000 234,567,000 215,000,000 280,000,000 305,000,000 285,000,000 294,464,000 304,374,000 279,285,000 299,196,000 299,106,000 224,017,000 225,000,000                    
        accumulated other comprehensive income
          21,000  168,000                                  81,000 81,000 81,000 12,000 -1,199,000                 
        restricted investments, held-to-maturity, amortized cost
               530,000 1,028,000 3,082,000 4,076,000 7,175,000 7,827,000 7,856,000 8,302,000 5,866,000 7,140,000 8,589,000 8,954,000 9,001,000 9,052,000 8,272,000 8,836,000 8,912,000 10,034,000 10,277,000 11,640,000  20,511,000                               
        acquisition escrow
                 444,657,000                                                  
        liabilities and stockholders' equity
                                                                   
        accounts receivable securitization – less current portion
                      278,539,000 278,483,000 278,428,000 278,372,000                                          
        total property and equipment
                       5,118,897,000    4,223,348,000    3,742,739,000    3,305,944,000   2,877,919,000 2,847,143,000 2,696,268,000 2,745,228,000 2,755,004,000 2,793,491,000 2,754,487,000 2,705,120,000 2,735,688,000 2,779,599,000 2,771,571,000 2,664,574,000 2,586,256,000 2,520,435,000 2,430,583,000 2,400,832,000 2,420,292,000 2,370,472,000 2,447,733,000 2,265,371,000 2,189,231,000 2,131,617,000 2,115,848,000 2,104,007,000 2,074,859,000 2,039,812,000 2,048,398,000 2,014,741,000 2,000,135,000 
        operating lease right-of-use assets
                            119,350,000 136,953,000 159,283,000  192,504,000 221,026,000 252,900,000                                 
        cash and cash equivalents — restricted
                                   46,888,000   55,616,000 73,657,000    57,046,000                        
        restricted investments, held to maturity, amortized cost
                                   17,413,000  21,498,000 22,281,000 22,232,000 22,303,000 22,025,000 22,859,000 22,717,000 22,864,000 22,766,000 23,171,000 23,215,000 23,134,000 18,284,000 18,286,000 24,510,000 25,091,000 25,666,000 25,832,000 25,814,000 24,175,000 26,955,000 29,328,000         
        capital lease obligations and long-term debt – current portion
                                   58,672,000 63,555,000 65,876,000                              
        capital lease obligations – less current portion
                                   71,248,000 73,686,000 93,302,000 120,747,000 127,132,000 135,540,000                           
        as of december 31, 2018, common stock, par value 0.01 per share...
                                   1,728,000                                
        as of december 31, 2017, class b common stock, par value 0.01 per share...
                                                                   
        as of september 30, 2018, common stock, par value 0.01 per share...
                                    1,756,000                               
        as of june 30, 2018, common stock, par value 0.01 per share...
                                     1,786,000                              
        equipment sales receivables
                                      1,197,000 8,925,000 709,000                           
        notes receivable
                                      4,059,000 4,742,000 5,984,000                           
        notes receivable, long-term
                                      11,496,000 11,060,000 12,659,000                           
        other long-term assets, restricted cash, and investments
                                      39,730,000 36,184,000                            
        long-term debt – current portion
                                      441,000 30,000 30,000                           
        capital lease obligations – current portion
                                      46,279,000 48,972,000 54,561,000                           
        dividend payable – current portion
                                      277,000 303,000 299,000                           
        long-term dividend payable and other long-term liabilities
                                      24,465,000 26,398,000 29,643,000                           
        class a common stock, par value 0.01 per share...
                                      1,783,000 1,780,000 1,779,000 842,000 835,000 833,000 826,000 837,000 849,000 878,000 919,000 917,000 914,000 911,000 906,000 905,000 886,000 883,000 880,000 876,000 873,000 871,000 870,000 870,000 870,000 794,000 794,000 794,000 733,000 
        class b common stock, par value 0.01 per share...
                                         497,000 497,000 497,000 497,000 497,000 510,000 510,000 510,000 510,000 510,000 510,000 510,000 510,000 525,000 525,000 525,000 525,000 525,000 525,000 525,000 525,000 525,000 601,000 601,000 601,000 601,000 
        assets:
                                                                   
        cash and cash equivalents - restricted
                                        62,685,000                           
        other long-term assets, restricted cash and investments
                                        35,866,000                           
        liabilities and stockholders' equity:
                                                                   
        accounts receivable
                                         401,261,000 396,251,000 408,593,000 403,895,000 417,422,000 408,769,000 422,421,000 448,323,000 451,799,000 452,757,000 478,999,000 454,188,000 460,358,000 454,709,000 418,436,000 413,077,000 360,730,000 358,306,000 338,724,000 360,324,000 348,889,000 339,191,000 334,504,000 332,312,000 314,666,000 276,879,000 
        equipment sales receivable
                                         444,000 2,243,000   1,197,000 6,710,000    689,000 288,000 878,000 436,000 7,276,000 368,000  815,000 2,629,000 563,000 4,644,000 1,755,000 734,000     
        income tax refund receivable
                                         2,766,000 272,000 206,000 9,987,000 167,000 3,553,000 11,664,000 17,369,000 4,399,000 4,233,000 18,455,000 5,340,000 4,314,000 11,854,000 23,704,000 25,754,000 8,424,000 12,258,000 10,046,000 15,086,000 2,317,000 1,726,000 6,267,000 8,633,000 5,988,000 5,059,000 
        inventories and supplies
                                         16,699,000 16,663,000 16,630,000 16,264,000 15,838,000 18,478,000 18,426,000 19,094,000 18,633,000 18,074,000 18,992,000 20,736,000 20,764,000 17,776,000 18,430,000 18,149,000 15,744,000 16,095,000 15,678,000 18,356,000 17,812,000 22,441,000 17,552,000 17,916,000 11,731,000 9,882,000 
        prepaid taxes, licenses, insurance, and other
                                         45,796,000 48,557,000 47,038,000 50,669,000 46,996,000                      
        current portion of notes receivable
                                         5,805,000 6,414,000 6,961,000 7,668,000 8,316,000 9,425,000 9,817,000 9,523,000 9,093,000 8,730,000 9,202,000 9,144,000 9,001,000 8,419,000 7,210,000 6,389,000 4,692,000 4,926,000 4,957,000 5,263,000 5,051,000 5,766,000   10,403,000 8,122,000 
        property and equipment, at cost:
                                                                   
        revenue and service equipment
                                         2,214,224,000 2,229,531,000 2,266,137,000 2,233,507,000 2,190,088,000 2,229,163,000 2,278,618,000 2,279,852,000 2,194,255,000 2,120,927,000 2,061,835,000 1,983,177,000 1,955,516,000 1,983,607,000 1,942,423,000 2,008,793,000 1,864,475,000 1,794,258,000 1,740,456,000 1,712,464,000 1,703,760,000 1,676,849,000 1,639,336,000 1,648,280,000 1,616,782,000 1,600,025,000 
        land
                                         132,335,000 132,335,000 132,084,000 131,693,000 131,693,000 131,693,000 131,693,000 127,865,000 127,865,000 122,835,000 122,835,000 117,183,000 116,973,000 116,973,000 117,929,000 124,971,000 115,672,000 112,587,000 112,587,000 125,788,000 125,788,000 125,788,000 133,711,000 136,043,000 136,043,000 141,474,000 
        facilities and improvements
                                         288,626,000 283,949,000 281,390,000 278,291,000 276,664,000 271,408,000 269,769,000 270,041,000 263,645,000 273,567,000 268,025,000 267,484,000 262,157,000 256,719,000 248,724,000 254,933,000 237,527,000 235,620,000 234,996,000 234,251,000 231,044,000 230,359,000 228,600,000 227,758,000 227,473,000 224,976,000 
        furniture and office equipment
                                         110,043,000 109,189,000 113,880,000 110,996,000 106,675,000 103,424,000 99,519,000 93,813,000 78,809,000 68,927,000 67,740,000 62,739,000 66,186,000 62,993,000 61,396,000 59,036,000 47,697,000 46,766,000 43,578,000 43,345,000 43,415,000 41,863,000 38,165,000 36,317,000 34,443,000 33,660,000 
        net property and equipment
                                         1,458,572,000 1,483,031,000 1,548,601,000 1,553,874,000 1,528,558,000 1,582,845,000 1,651,100,000 1,678,584,000 1,614,600,000 1,569,196,000 1,542,130,000 1,483,943,000 1,450,352,000 1,468,771,000 1,447,807,000 1,505,087,000 1,400,468,000 1,338,205,000 1,311,814,000 1,311,062,000 1,301,660,000 1,287,695,000 1,291,987,000 1,317,835,000 1,315,399,000 1,339,638,000 
        other assets
                                         22,636,000 23,511,000 21,953,000 22,664,000 22,836,000 24,573,000 29,353,000 29,597,000 34,928,000 37,957,000 41,855,000 47,038,000 50,735,000 50,926,000 57,166,000 57,031,000 50,700,000 52,188,000 59,010,000 68,814,000 70,765,000 66,398,000 70,445,000 66,497,000 53,618,000 59,049,000 
        current portion of claims accruals
                                         87,275,000 86,191,000 80,866,000 78,478,000 85,565,000 75,850,000 84,429,000 79,103,000 74,465,000 73,429,000 81,251,000 82,809,000 75,578,000 80,645,000 75,469,000 88,843,000 80,567,000 79,725,000 74,070,000 70,827,000 71,828,000 75,730,000 70,814,000 75,021,000 81,227,000 86,553,000 
        current portion of long-term debt
                                         3,419,000 5,946,000 8,459,000 799,000 4,529,000 15,543,000 35,582,000 29,747,000 30,860,000 32,581,000 31,445,000                
        current portion of capital lease obligations
                                         45,194,000 60,060,000 72,473,000 71,988,000 72,438,000 53,294,000 59,794,000 63,223,000 52,499,000 45,891,000 42,902,000                
        long-term debt, less current portion
                                         449,268,000 470,932,000 493,346,000 593,263,000 593,516,000 631,620,000 645,290,000 652,498,000 858,879,000 867,042,000 871,615,000                
        capital lease obligations, less current portion
                                         143,648,000 151,468,000 161,463,000 176,871,000 178,127,000 210,612,000 222,001,000 232,398,000 203,447,000 153,786,000 158,104,000                
        claims accruals, less current portion
                                         173,269,000 174,662,000 165,726,000 155,317,000 160,968,000 158,889,000 149,281,000 151,980,000 148,559,000 152,732,000 143,693,000 143,254,000 135,878,000 125,729,000 118,582,000 105,492,000 105,232,000 103,647,000 98,919,000 105,289,000 104,596,000 103,307,000 109,037,000 110,433,000 137,253,000 135,596,000 
        deferred income taxes
                                         398,083,000 408,795,000 427,722,000 438,369,000 445,742,000 459,437,000 463,832,000 30,993,000 39,348,000 35,276,000 44,861,000 42,281,000 41,591,000 39,758,000 46,833,000 63,749,000 45,688,000 94,101,000 98,235,000 61,568,000 64,447,000 84,961,000 29,475,000 27,798,000 28,721,000 30,741,000 
        other liabilities
                                         4,792,000 5,804,000 6,296,000 6,699,000 1,464,000 1,239,000 959,000 530,000 181,000 32,000 14,000 21,000 2,358,000 2,665,000 3,457,000 3,133,000       4,131,000 4,133,000 6,201,000 6,207,000 
        accumulated deficit
                                          -7,874,000 -30,242,000 -79,503,000 -92,425,000 -119,654,000 -139,033,000 -184,942,000 -221,223,000 -272,177,000 -310,017,000 -368,508,000 -418,666,000 -458,864,000 -471,169,000 -516,467,000 -593,886,000 -636,827,000 -660,168,000 -707,018,000 -756,234,000 -789,933,000 -832,933,000 -863,883,000 -883,466,000 -886,671,000 
        restricted cash
                                              57,356,000 55,241,000 58,453,000 64,309,000 61,692,000 45,621,000 51,511,000 52,815,000 47,012,000 50,833,000 50,376,000 42,694,000 45,467,000 51,678,000 54,832,000 57,168,000 61,006,000 74,574,000 96,294,000 85,078,000 84,568,000 
        prepaid taxes, licenses, insurance and other
                                              48,034,000 48,149,000 53,724,000 47,137,000 48,874,000 51,441,000 58,647,000 55,256,000 57,397,000 63,958,000 65,106,000 47,143,000 49,034,000 47,241,000 48,231,000 44,350,000 50,036,000 44,243,000 43,184,000 44,128,000 40,709,000 
        fair value of interest rate swaps
                                                 2,213,000 4,233,000             8,830,000 3,412,000   
        current portion of accounts receivable securitization
                                                250,000,000                   
        accounts receivable securitization, less current portion
                                                                   
        securitization of accounts receivable
                                                 264,000,000 294,000,000 334,000,000 315,000,000 319,000,000 259,000,000 264,000,000 260,000,000 165,000,000 204,000,000 204,000,000 204,000,000 203,000,000 163,000,000 180,000,000 176,000,000 136,000,000 171,500,000 
        contingencies
                                                                   
        fair value of guarantees
                                                       366,000 366,000 366,000 366,000 366,000 1,195,000 1,195,000 1,195,000 2,886,000 2,886,000 2,886,000 2,886,000 
        current portion of fair value of interest rate swaps
                                                   6,109,000                
        fair value of interest rate swaps, less current portion
                                                     3,640,000 5,435,000 7,050,000 7,532,000 8,804,000 10,637,000 11,159,000 11,780,000 11,797,000 11,000,000     
        current portion of long-term debt and obligations under capital leases
                                                    76,138,000 85,962,000 80,619,000 75,056,000 62,273,000 62,810,000 59,182,000 47,495,000 41,102,000 46,854,000 96,650,000 54,003,000 55,728,000 41,714,000 66,070,000 
        current portion of interest rate swaps
                                                    7,815,000 5,692,000 5,225,000 4,718,000 4,921,000 3,993,000 2,637,000 1,853,000 993,000 373,000      
        long-term debt and obligations under capital leases, less current portion
                                                    988,724,000 1,016,625,000 1,195,305,000 1,246,764,000 1,286,307,000 1,263,682,000 1,242,832,000 1,323,539,000 1,389,768,000 1,408,123,000      
        central stockholders' loans receivable, pre-acquisition
                                                                   
        restricted fixed maturity securities, held to maturity, amortized cost
                                                           22,275,000        
        fixed maturity securities, held to maturity, amortized cost-restricted
                                                            18,216,000 14,612,000 11,086,000     
        noncontrolling interests
                                                            202,000 202,000  202,000 202,000   
        long-term debt and obligations under capital leases
                                                              1,446,387,000 1,533,711,000 1,632,732,000 1,652,095,000 1,708,030,000 
        insurance claims receivable
                                                                 34,892,000 34,892,000 
        stockholders’ equity
                                                                   
        liabilities and stockholders’ deficit
                                                                   
        stockholders’ deficit:
                                                                   
        total stockholders’ deficit
                                                                 -9,768,000 -83,171,000 
        total liabilities and stockholders’ deficit
                                                                 2,555,680,000 2,567,895,000 
        operating revenue
                                                                 758,889,000 2,929,723,000 
        operating expenses:
                                                                   
        salaries, wages and employee benefits
                                                                 195,476,000 763,962,000 
        operating supplies and expenses
                                                                 57,104,000 217,965,000 
        fuel
                                                                 150,281,000 468,504,000 
        purchased transportation
                                                                 194,037,000 771,333,000 
        rental expense
                                                                 17,989,000 76,540,000 
        insurance and claims
                                                                 22,725,000 87,411,000 
        depreciation and amortization of property and equipment
                                                                 50,358,000 206,279,000 
        amortization of intangibles
                                                                 4,727,000 20,472,000 
        impairments
                                                                  1,274,000 
        gain on disposal of property and equipment
                                                                 -2,255,000 -8,287,000 
        communication and utilities
                                                                 6,460,000 25,027,000 
        operating taxes and licenses
                                                                 15,258,000 56,188,000 
        total operating expenses
                                                                 712,160,000 2,686,668,000 
        operating income
                                                                 46,729,000 243,055,000 
        other incomes:
                                                                   
        interest expense
                                                                 37,501,000 251,129,000 
        derivative interest expense
                                                                 4,680,000 70,399,000 
        interest income
                                                                 -467,000 -1,379,000 
        other
                                                                 -511,000 -3,710,000 
        total other incomes
                                                                 41,203,000 411,900,000 
        income before income taxes
                                                                 5,526,000 -168,845,000 
        income tax benefit
                                                                 2,321,000  
        net income
                                                                 3,205,000 -125,413,000 
        basic earnings per share
                                                                 20  
        diluted earnings per share
                                                                 20  
        shares used in per share calculations
                                                                   
        basic
                                                                 138,127,000  
        diluted
                                                                 138,900,000  
        retained interest in accounts receivable
                                                                   
        pre-reorganization common stock, par value 0.001 par value per share...
                                                                   
        stockholder loans receivable
                                                                   
        loss on debt extinguishment
                                                                  95,461,000 
        income tax (benefit) expense
                                                                  -43,432,000 
        basic and diluted loss per share
                                                                  -1,980 
        shares used in per share calculation
                                                                  63,339,000 
        pro forma c corporation data:
                                                                   
        historical income before income taxes
                                                                   
        pro forma benefit for income taxes
                                                                   
        pro forma net income
                                                                   
        pro forma basic and diluted loss per share
                                                                   
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-09-30 2025-06-30 2025-03-31 2024-09-30 2024-06-30 2024-03-31 2023-09-30 2023-06-30 2023-03-31 2022-09-30 2022-06-30 2022-03-31 2021-03-31 2020-03-31 2019-03-31 2018-09-30 2018-06-30 2018-03-31 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 
                                                   
          cash flows from operating activities:
                                                   
          net income
        -1,413,000 72,492,000 64,160,000 30,229,000 46,959,000 16,900,000 -2,993,000 226,514,000 166,617,000 103,713,000 622,522,000 427,730,000 208,288,000 129,843,000 65,783,000 88,183,000 268,704,000 162,360,000 70,732,000 5,207,000 50,442,000 24,024,000 42,896,000 31,905,000 72,502,000 36,281,000 50,954,000 37,840,000 58,491,000 50,158,000 40,198,000 12,305,000 45,298,000 43,842,000 42,941,000 23,341,000 46,850,000 27,852,000 33,699,000 6,188,000 30,950,000 19,583,000 3,205,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                   
          depreciation and amortization of property, equipment, and intangibles
        195,711,000 590,791,000 392,509,000 196,725,000 595,322,000 397,802,000 200,408,000 540,555,000 345,035,000 172,149,000 491,524,000 324,907,000 161,210,000 131,664,000 121,695,000 111,630,000 319,210,000 210,807,000 104,372,000 71,973,000 72,453,000 71,449,000                      
          gain on sale of property and equipment
        -7,898,000 -54,680,000 -33,784,000 -15,542,000 -21,839,000 -12,604,000 -6,651,000 -46,628,000 -35,180,000 -20,879,000 -73,373,000 -57,808,000 -34,801,000 -10,537,000 -3,005,000 -11,786,000 -26,857,000 -15,812,000                          
          impairments
        882,000 45,417,000 10,612,000 28,000 10,867,000 9,859,000 3,982,000    810,000 810,000 810,000  902,000          1,480,000               
          deferred income taxes
        -10,115,000 21,309,000 -33,897,000 -22,434,000 -21,569,000 -30,970,000 -13,673,000 9,587,000 -8,002,000 -1,316,000 1,126,000 -2,439,000 4,246,000 -18,920,000 15,330,000 -9,603,000 48,045,000 6,558,000 -10,323,000 -19,196,000 -10,409,000 -7,431,000 -13,766,000 -4,473,000 34,582,000 4,530,000 -6,290,000 -6,346,000 29,140,000 -7,582,000 -17,596,000 -7,942,000 37,595,000 27,964,000 22,314,000 14,417,000 19,709,000 13,897,000 17,812,000 -5,712,000 16,967,000 13,359,000 2,426,000 
          non-cash lease expense
        41,643,000 120,998,000 77,327,000 36,587,000 137,768,000 82,263,000 46,885,000 68,778,000 22,138,000 10,651,000 30,973,000 19,795,000 9,490,000 15,589,000 24,202,000 27,626,000                            
          gain on equity securities
        -109,000  -177,000 -121,000  -288,000 -110,000                                     
          other adjustments to reconcile net income to net cash from operating activities
        13,412,000 31,380,000 12,204,000 2,618,000 -3,684,000 1,324,000 1,929,000 46,224,000 36,277,000 14,777,000 32,545,000 25,603,000 32,229,000 -6,522,000 14,065,000 -2,762,000 930,000 -660,000                          
          increase in cash resulting from changes in:
                                                   
          trade receivables
        -123,809,000 -69,755,000 -53,883,000 -67,280,000 39,612,000 32,115,000 17,995,000 84,149,000 126,429,000 35,614,000 -44,043,000 -103,740,000 -28,007,000 -11,586,000 -5,268,000 62,362,000 -17,191,000 9,024,000                          
          income tax receivable
        9,734,000 -42,116,000 9,244,000 23,737,000 19,624,000 26,549,000 7,542,000 -1,237,000 41,671,000 28,753,000 -14,191,000 -5,971,000 692,000 2,872,000 4,380,000 5,544,000 13,878,000 25,078,000 28,273,000                         
          accounts payable
        39,448,000 -86,406,000 -63,469,000 -28,559,000 -57,066,000 -39,647,000 -25,564,000 -10,495,000 5,072,000 11,960,000 14,259,000 2,060,000 22,074,000 12,534,000 31,084,000 -1,811,000 -10,528,000 -14,513,000 -12,182,000                         
          accrued liabilities and claims accrual
        23,542,000 18,823,000 -128,000 -9,135,000 -135,189,000 -132,943,000 -148,098,000 26,599,000 46,408,000 8,194,000 19,207,000 50,822,000 89,289,000 70,975,000 -93,193,000 14,250,000 -5,434,000 -6,263,000 16,145,000                         
          operating lease liabilities
        -41,417,000 -118,823,000 -75,366,000 -35,457,000 -146,973,000 -91,427,000 -54,270,000 -68,140,000 -22,187,000 -10,489,000 -30,755,000 -19,772,000 -9,267,000 -15,174,000 -25,414,000 -27,403,000                            
          other assets and liabilities
        2,929,000 14,725,000 20,577,000 -1,967,000 49,347,000 51,767,000 9,893,000 -304,000 -218,000 -6,604,000 -2,442,000 7,050,000 607,000 5,375,000 4,782,000 -12,778,000 -10,112,000 -667,000                          
          net cash from operating activities
        142,540,000 543,431,000 325,929,000 109,429,000 524,741,000 310,700,000 37,275,000 873,502,000 722,190,000 345,159,000 1,099,195,000 719,984,000 456,860,000 306,113,000 155,343,000 243,452,000 580,645,000 375,912,000 208,864,000 118,898,000 137,479,000 84,817,000 112,285,000 131,731,000 212,276,000 109,019,000 120,046,000 128,157,000 102,968,000 109,330,000 107,326,000 76,157,000 117,641,000 135,520,000 123,454,000 96,889,000 147,310,000 93,396,000 95,678,000 70,172,000 95,008,000 62,338,000 59,875,000 
          cash flows from investing activities:
                                                   
          proceeds from sale of property and equipment, including assets held for sale
        44,434,000 234,234,000 158,366,000 82,610,000 183,589,000 114,033,000 50,605,000 214,234,000 98,755,000 59,345,000 139,545,000 104,239,000 60,532,000 67,175,000 33,756,000 56,661,000 150,596,000 99,028,000 49,423,000                         
          purchases of property and equipment
        -130,037,000 -641,573,000 -330,614,000 -122,048,000 -592,081,000 -372,661,000 -191,905,000 -852,677,000 -517,856,000 -260,339,000 -496,237,000 -295,522,000 -164,974,000 -111,020,000 -109,431,000 -105,780,000 -502,738,000 -220,414,000 -56,466,000                         
          expenditures on assets held for sale
         -855,000 -716,000 -334,000 -312,000 -79,000 -32,000 -785,000 -634,000 -360,000 -499,000 -449,000 -43,000 -401,000 -352,000 -4,271,000 -25,426,000 -19,497,000 -6,474,000 -4,355,000 -6,243,000 -12,281,000 -5,543,000 -6,960,000 -6,160,000 -8,316,000 -9,148,000 -2,313,000 -1,153,000 -909,000 -470,000 -1,521,000 -973,000 -15,828,000 -781,000 -833,000 -6,105,000 -3,712,000 -504,000 -1,719,000 -1,106,000 -1,902,000 -3,085,000 
          acquisition of leased assets
         -10,425,000 -10,425,000 -10,425,000                                        
          other cash flows from investing activities
        2,025,000 -5,891,000 -6,228,000 -4,022,000 -25,255,000 -664,000 1,055,000 5,896,000 155,000 1,229,000 1,944,000 -9,190,000 -1,920,000 9,398,000 -2,793,000 2,925,000 10,074,000 9,248,000                          
          net cash from investing activities
        -83,578,000 -424,510,000 -189,617,000 -54,219,000 -619,020,000 -258,841,000 -139,747,000 -1,088,030,000 -415,990,000 -197,305,000 -358,626,000 -204,306,000 -110,187,000 -74,141,000 -125,582,000 -44,721,000 -467,495,000 -232,564,000 -110,651,000 -5,154,000 -71,890,000 -56,572,000 8,405,000 -2,550,000 -37,589,000 -68,032,000 -79,572,000 -56,614,000 -66,311,000 -27,587,000 -20,649,000 -25,203,000 -36,086,000 -188,654,000 -61,046,000 -25,934,000 -65,660,000 -41,736,000 -53,834,000 -11,269,000 -1,571,000 -69,949,000 -31,549,000 
          cash flows from financing activities:
                                                   
          repayments of finance leases and long-term debt
        -56,942,000 -1,561,267,000 -148,948,000 -71,518,000 -214,881,000 -100,147,000 -58,781,000 -81,354,000 -38,148,000                                   
          borrowings on revolving lines of credit
        62,000,000 907,000,000 165,000,000 118,000,000 160,000,000 53,000,000           110,000,000                           
          repayments on revolving lines of credit
        -30,000,000 -432,000,000 -100,000,000 -70,000,000      -43,000,000 -114,000,000 -131,000,000 -95,000,000     -5,000,000                          
          borrowings under accounts receivable securitization
         46,000,000 30,000,000 10,000,000 28,800,000 22,000,000 12,000,000 25,000,000        25,000,000 35,000,000 15,000,000  25,000,000 5,000,000   10,000,000 40,000,000 15,000,000 10,000,000 19,000,000 5,000,000   4,000,000 100,000,000 24,000,000 56,000,000 44,000,000 37,000,000 85,000,000 89,000,000 78,000,000 64,000,000 22,000,000 
          repayments of accounts receivable securitization
         -50,000,000 -50,000,000 -35,000,000 -96,600,000 -96,600,000 -85,000,000 -82,000,000 -80,000,000                                   
          proceeds from common stock issued
        1,010,000 4,422,000 3,409,000 1,066,000 4,177,000 3,108,000 953,000 4,200,000 3,222,000 1,086,000 6,111,000 5,057,000 1,220,000 2,709,000 3,257,000 2,941,000 12,369,000 10,934,000  1,888,000 8,339,000 2,449,000 2,270,000 1,411,000 500,000 2,352,000 2,636,000 2,679,000                
          dividends paid
        -32,688,000 -88,214,000 -58,985,000 -29,313,000 -78,256,000 -52,342,000 -25,909,000 -68,550,000 -45,940,000 -22,983,000 -59,011,000 -39,721,000 -20,137,000 -13,624,000 -13,964,000 -10,672,000 -32,287,000 -21,731,000                          
          other cash flows from financing activities
        -11,504,000 -15,078,000 -2,062,000 462,000 -7,735,000 -11,307,000 -486,000 -18,206,000 -19,510,000 -11,748,000 -31,104,000 -20,316,000 -15,608,000 -4,190,000 -2,050,000 -1,662,000 -4,270,000 -3,601,000                          
          net cash from financing activities
        -68,124,000 -189,137,000 -161,586,000 -76,303,000 -54,495,000 -182,288,000 -22,223,000 286,090,000 236,624,000 -134,591,000 -748,829,000 -552,361,000 -323,249,000 -185,366,000 -71,885,000 -217,784,000 -123,497,000 -126,769,000  -141,365,000 -47,456,000 -75,119,000 -145,282,000 -94,047,000 -120,803,000 -40,932,000 -55,559,000 -107,939,000 -1,821,000 -84,975,000 -59,247,000 -64,034,000 -73,806,000 61,053,000 -57,644,000 -85,805,000 -71,375,000 -43,854,000 -54,013,000 -93,303,000 -97,916,000 30,718,000 -54,271,000 
          net decrease in cash, restricted cash, and equivalents
        -9,162,000 -70,216,000 -25,274,000 -21,093,000           -42,124,000 -19,053,000                            
          cash, restricted cash, and equivalents at beginning of period
        308,740,000 370,230,000 370,230,000 370,230,000 469,686,000 469,686,000 469,686,000 385,345,000 385,345,000 385,345,000 350,023,000 350,023,000 350,023,000 197,277,000 202,228,000 130,976,000 151,733,000 151,733,000                          
          cash, restricted cash, and equivalents at end of period
        299,578,000 300,014,000 344,956,000 349,137,000 320,912,000 339,257,000 344,991,000 456,907,000 928,169,000 398,608,000 341,763,000 313,340,000 373,447,000 243,883,000 160,104,000 111,923,000 141,386,000 168,312,000                          
          loss on equity securities
         -724,000   11,562,000   -2,100,000 -1,870,000  51,033,000 50,937,000                                
          proceeds from maturities of held-to-maturity investments
            530,000 530,000 530,000 3,620,000 3,620,000 3,620,000 7,506,000 4,306,000 1,881,000 500,000 4,350,000 8,315,000 20,625,000 18,218,000 5,532,000                         
          purchases of held-to-maturity investments
               -30,000 -30,000 -525,000 -9,594,000 -6,399,000 -4,372,000 -512,000 -4,301,000 -2,571,000 -18,933,000 -17,454,000 -5,422,000                         
          net cash, restricted cash, and equivalents invested in acquisitions
            -185,491,000   -458,288,000  -275,000 -1,291,000 -1,291,000 -1,291,000 -39,281,000                              
          proceeds from long-term debt
         1,000,000,000   150,000,000   250,000,000 250,000,000                680,000,000 4,504,000 450,000,000   -1,000 18,740,000 4,328,000 3,200,000      
          net increase in cash, restricted cash, and equivalents
            -148,774,000 -130,429,000 -124,695,000 71,562,000 542,824,000 13,263,000 -8,260,000 -36,683,000 23,424,000 46,606,000   -10,347,000 16,579,000                          
          repurchases of the company's common stock
                  -299,941,000 -299,941,000 -144,881,000 -53,661,000 -34,630,000                             
          borrowings (repayments) on revolving lines of credit
              135,000,000 257,000,000 167,000,000                                   
          non-cash adjustment to fair value of convertible note
                                                   
          investment in convertible note
                                                   
          (gain) loss on equity securities
                 -1,364,000                                  
          repayment of finance leases and long-term debt
                 -22,946,000 -250,884,000 -66,440,000 -48,843,000 -6,600,000 -14,498,000                             
          repayment of accounts receivable securitization
                 -35,000,000    -15,000,000 -25,000,000 -90,000,000 -105,000,000 -105,000,000   -25,000,000   -35,000,000 -54,000,000 -45,000,000 -50,000,000 -9,000,000 -35,000,000 -5,000,000 -5,000,000 -63,000,000 -56,000,000 -44,000,000 -36,000,000 -45,000,000 -106,000,000 -74,000,000 -24,000,000 -57,500,000 
          (repayments) borrowings on revolving lines of credit
                     -95,000,000                              
          investment in convertible notes
                                                   
          proceeds from maturities and sales of held-to-maturity investments
                                                   
          net cash and equivalents invested in acquisitions
                      -46,811,000                             
          (repayments) borrowings on revolving line of credit
                                                   
          borrowings (repayments) on revolving line of credit
                      15,000,000                             
          net cash, restricted cash, and equivalents (invested in) acquired from 2017 merger and other acquisitions
                                                   
          borrowings on revolving line of credit
                                                   
          net cash, restricted cash, and equivalents invested in acquisition
                                                   
          repayment of long-term debt and finance leases
                       -8,391,000                            
          repayments on revolving line of credit
                       -135,000,000                            
          net cash, restricted cash, and equivalents (invested in) acquired from merger and acquisitions
                                                   
          repayment of long-term debt and capital leases
                        -39,309,000 -17,371,000  -47,427,000 -115,704,000 -18,597,000 -61,993,000 -50,535,000 -25,255,000 -905,784,000 -29,483,000 -19,294,000 -452,540,000 -64,702,000 -660,860,000 -46,526,000 -36,898,000 -84,018,000 -25,339,000 -90,133,000 -71,460,000 -43,708,000 -100,910,000 -70,523,000 -101,518,000 -6,107,000 -81,765,000 
          payments to repurchase company's common stock
                        -100,000,000                           
          net cash, restricted cash, and equivalents (invested in) acquired from mergers and acquisitions
                        -101,693,000                           
          abilene acquisition, net of cash acquired
                         -101,693,000                          
          amortization of debt issuance costs and other
                          163,000                         
          gain on sale of equipment
                          -7,096,000                         
          reduction of allowance for doubtful accounts and notes receivable
                          -1,691,000                         
          stock-based compensation expense
                          1,989,000 2,673,000 1,326,000 1,150,000 2,124,000 1,417,000                    
          income from investment in transportation resource partners
                          -813,000                         
          transportation resource partners impairment
                                                   
          trade and equipment sales receivables
                          22,285,000                         
          other current assets
                          747,000                         
          prepaid expenses
                          -2,324,000                         
          other long-term assets
                          -1,413,000                         
          proceeds from notes receivable
                          1,372,000                         
          payments received on equipment sale receivables
                          220,000      -5,000 281,000 -340,000 352,000 -17,000 -84,000 469,000 184,000 622,000 48,000 596,000 62,000 84,000 30,000 5,466,000    
          return of investment from transportation resource partners
                          2,733,000                         
          cash proceeds from transportation resource partners
                                                   
          investment in abilene, net of cash acquired
                          -101,569,000                         
          see accompanying notes to condensed consolidated financial statements (unaudited).
                                                   
          condensed consolidated statements of cash flows (unaudited) — continued
                                                   
          earn-out on sold investment
                                                   
          gain from available-for-sale securities
                                                   
          benefit from doubtful accounts and notes receivable
                                                   
          non-cash compensation expense for issuance of common stock to certain members of the board of directors
                                                   
          excess tax benefits from stock-based compensation
                               -77,000 53,000 260,000 -1,288,000 -1,172,000                
          trade receivables and equipment sales receivable
                                                   
          increase in cash and cash equivalents — restricted
                                                   
          proceeds from sale of available-for-sale securities
                                                   
          cash payments to transportation resource partners
                                                   
          investment in barr-nunn transportation
                                                   
          cash and cash equivalents received with 2017 merger
                                                   
          see accompanying notes to consolidated financial statements.
                                                   
          repayments on knight revolver
                                                   
          borrowings on revolver
                                                   
          payment of deferred loan costs
                                -995,000    1,000 -1,243,000   -926,000 -1,257,000 -14,000 -3,077,000 -5,932,000 -286,000   
          share withholding for taxes due on equity awards
                           -826,000                        
          cash distribution to noncontrolling interest holder
                                                   
          net increase in cash and cash equivalents
                           -27,621,000   -24,592,000 35,134,000 53,884,000 55,000   34,836,000 -3,232,000              
          cash and cash equivalents at beginning of period
                           89,391,000 107,590,000 105,132,000 59,178,000 53,596,000 82,084,000 47,494,000 
          cash and cash equivalents at end of period
                           61,770,000 18,133,000 -46,874,000 -24,592,000 142,724,000 53,884,000 55,000 -15,085,000 68,736,000 34,836,000 -3,232,000 27,430,000 46,098,000 7,749,000 7,919,000 4,764,000 38,746,000 10,275,000 7,806,000 -12,169,000 47,684,000 -4,479,000 23,107,000 21,549,000 
          depreciation and amortization of property, equipment and intangibles
                               71,155,000 71,744,000 71,056,000 64,618,000 61,131,000 59,990,000 58,573,000 58,994,000 60,379,000 60,207,000 71,349,000 56,730,000 54,536,000  53,491,000 54,604,000 54,697,000 55,567,000 56,170,000 55,085,000 
          amortization of debt issuance costs, and other
                           336,000                        
          income from investment in trp partnerships
                                                   
          decrease (increase) in cash and cash equivalents – restricted
                           2,101,000                        
          purchases of held-to maturity investments
                                                   
          proceeds from sale of property and equipment/assets held for sale
                                                   
          proceeds from exercise of stock options
                                               263,000    
          net cash from (used) in financing activities
                                                   
          gain on disposal of property and equipment, less write-off of totaled tractors
                           -2,969,000 -1,057,000                       
          reduction of losses on accounts receivable
                           -540,000                        
          accounts receivable
                           12,882,000 -6,177,000 14,908,000 -8,641,000 14,885,000 23,246,000 1,740,000 -741,000 24,329,000 -25,614,000 5,733,000 -6,462,000 -37,064,000 2,326,000 4,676,000 -4,226,000 -19,389,000 22,085,000 -11,416,000 -10,576,000 -15,293,000 -1,641,000 -17,582,000 -37,872,000 
          inventories and supplies
                           -33,000 -366,000 -426,000 2,640,000 -52,000 668,000 -461,000 -559,000 918,000 1,745,000 27,000 -2,987,000 653,000 -283,000 -562,000 350,000 -417,000 2,678,000 -544,000 4,629,000 -5,000,000 364,000 -6,185,000 -1,849,000 
          prepaid expenses and other current assets
                           -1,585,000 21,842,000 -13,493,000 4,424,000 8,226,000 18,938,000 -19,557,000 1,571,000 16,789,000 -5,909,000 -4,417,000 9,682,000 18,446,000 11,933,000 -27,609,000 5,724,000 -2,061,000 13,724,000 -15,134,000 5,094,000 -3,322,000 1,307,000 -1,701,000 -4,348,000 
          other assets
                           -797,000 -1,511,000 120,000 230,000 2,332,000 1,202,000 2,032,000 3,101,000 1,450,000 8,731,000 -542,000 3,685,000 2,871,000 -680,000 2,177,000 781,000 4,018,000 3,194,000 1,697,000 -2,507,000 123,000 -5,995,000 -11,675,000 5,360,000 
          accounts payable, and accrued and other liabilities
                           50,947,000 10,341,000                       
          increase in cash and cash equivalents – restricted
                                                   
          proceeds from maturities of investments
                           4,790,000 6,400,000 10,580,000 6,903,000 6,386,000 9,050,000 2,990,000 6,785,000 14,190,000                
          purchases of investments
                           -5,003,000 -6,324,000 -10,740,000 -6,568,000 -6,429,000 -9,220,000 -7,885,000 -6,809,000 -8,016,000                
          proceeds from sale of property and equipment
                           27,124,000 17,182,000 24,913,000 37,044,000 34,271,000 39,785,000 29,882,000 33,293,000 13,370,000 16,348,000 39,584,000 48,660,000 28,428,000 43,346,000 40,590,000 25,283,000 9,939,000 29,008,000 32,370,000 23,382,000 33,858,000 30,512,000 10,477,000 5,880,000 
          capital expenditures
        -130,037,000 -641,573,000 -330,614,000 -122,048,000 -592,081,000 -372,661,000 -191,905,000 -852,677,000 -517,856,000 -260,339,000 -496,237,000 -295,522,000 -164,974,000 -111,020,000 -109,431,000 -105,780,000 -502,738,000 -220,414,000 -56,466,000 -35,566,000 -98,177,000 -72,307,000 -34,512,000 -34,450,000 -81,757,000 -94,161,000 -104,691,000 -62,006,000 -94,853,000 -76,045,000 -75,010,000 -60,058,000 -81,281,000 -86,607,000 -92,747,000 -57,636,000 -90,752,000 -71,362,000 -86,856,000 -44,246,000 -56,888,000 -71,624,000 -39,534,000 
          free cash flows
        12,503,000 -98,142,000 -4,685,000 -12,619,000 -67,340,000 -61,961,000 -154,630,000 20,825,000 204,334,000 84,820,000 602,958,000 424,462,000 291,886,000 195,093,000 45,912,000 137,672,000 77,907,000 155,498,000 152,398,000 83,332,000 39,302,000 12,510,000 77,773,000 97,281,000 130,519,000 14,858,000 15,355,000 66,151,000 8,115,000 33,285,000 32,316,000 16,099,000 36,360,000 48,913,000 30,707,000 39,253,000 56,558,000 22,034,000 8,822,000 25,926,000 38,120,000 -9,286,000 20,341,000 
          payments received on notes receivable
                           663,000 5,351,000 1,802,000 1,834,000 1,127,000 1,115,000 -399,000 1,471,000 2,065,000 1,722,000 1,533,000 673,000 1,553,000 1,093,000 701,000 1,040,000 1,034,000 1,591,000 1,155,000 1,222,000 1,980,000 1,334,000 2,137,000 1,647,000 
          payments received on assets held for sale
                           5,092,000 7,480,000 5,839,000 7,000,000 5,620,000 6,391,000 3,720,000 2,484,000 1,815,000 5,237,000 6,486,000 11,334,000 2,269,000 6,121,000 24,592,000 945,000 21,828,000 1,441,000 997,000 8,580,000 1,760,000 2,857,000 2,179,000 4,053,000 
          net repayments on revolving line of credit
                           -120,000,000        -57,000,000                
          repurchases of class a common stock
                            -2,119,000                       
          amortization of debt issuance costs, original issue discount, and other
                            337,000 329,000                      
          gain on sale of real property
                                        -798,000 -6,078,000        
          provision for (reduction of) losses on accounts receivable
                            1,479,000                       
          non-cash loss on debt extinguishment and write-offs of deferred financing costs and original issue discount
                                                  
          excess tax benefit from stock-based compensation
                            -2,028,000                       
          income effect of mark-to-market adjustment of interest rate swaps
                                412,000 -206,000 -119,000 -81,000 -31,000 -11,000 -32,000 151,000 572,000 -107,000 189,000        
          decrease in cash and cash equivalents — restricted
                                                   
          net (repayments) borrowings on revolving line of credit
                            80,000,000           -17,000,000            
          net decrease in cash and cash equivalents
                                   -36,396,000    -13,080,000  7,919,000 4,764,000 -14,850,000  7,806,000 -12,169,000 -34,400,000 -4,479,000 23,107,000 -25,945,000 
          gain on disposal of property and equipment less write-off of totaled tractors
                              -3,869,000 -5,763,000 -8,221,000 -8,467,000 -9,809,000 -3,698,000  -11,262,000 -7,564,000 -2,958,000 -8,672,000 -6,273,000 -4,376,000 -2,253,000 -3,116,000 -2,121,000 -2,886,000 -4,280,000 -1,942,000 -199,000 -1,998,000 
          benefit from losses on accounts receivable
                              -12,000 -1,233,000 2,656,000   1,913,000                
          excess tax deficiency (benefit) from stock-based compensation
                                                   
          accounts payable, accrued, and other liabilities
                                                   
          repurchase of class a common stock
                              -45,000,000 -45,000,000                    
          excess tax (deficiency) benefit from stock-based compensation
                                                   
          amortization of debt issuance costs, original issue discount, and losses on terminated swaps
                               351,000 363,000 346,000 2,622,000 2,606,000 2,613,000 2,717,000 2,562,000 2,515,000 2,140,000 3,239,000 640,000 1,228,000 1,277,000 1,723,000 3,385,000 4,260,000 5,355,000 6,193,000 6,117,000 
          accounts payable, accrued and other liabilities
                               13,058,000 -7,364,000 7,809,000 12,974,000 -10,447,000 -23,212,000 8,818,000 17,731,000 22,218,000 -34,361,000 15,577,000 -407,000 23,762,000 -21,722,000 21,285,000 -10,516,000 15,023,000 -6,371,000 2,120,000 31,240,000 
          increase in restricted cash
                               -2,115,000 3,212,000 5,856,000 -2,617,000 -16,071,000  1,304,000            -11,216,000 -510,000 
          equity losses of investee
                                        309,000 -427,000 455,000 200,000 338,000 325,000 280,000 78,000    
          non-cash equity compensation
                                1,907,000 1,735,000 1,400,000 1,483,000 1,504,000 1,539,000 1,292,000 1,061,000 1,180,000 2,087,000 833,000 545,000 514,000 1,406,000 1,458,000 1,267,000 781,000 2,319,000 2,424,000 
          interest on central stockholders' loan receivable, pre-acquisition
                                                  
          acquisition of central, net of debt repayment
                                        -2,480,000           
          net borrowings on revolving line of credit
                                   -25,000,000 -17,000,000   -45,000,000           
          issuance of central stockholders' loan receivable, pre-acquisition
                                                  
          distribution to central stockholders, pre-acquisition
                                                  
          supplemental disclosures of cash flow information:
                                                   
          cash paid during the period for:
                                                   
          interest
                                    29,532,000 10,478,000 37,477,000 11,854,000 35,405,000          7,391,000 
          income taxes
                                    23,275,000 37,460,000 18,578,000 3,463,000 23,000          842,000 
          non-cash investing activities:
                                                   
          equipment purchase accrual
                                    -4,548,000 20,463,000 -39,951,000 59,867,000 -31,659,000          9,840,000 
          notes receivable from sale of assets
                                    907,000 509,000 1,253,000 2,762,000 2,234,000          3,579,000 
          equipment sales receivables
                                    -590,000 425,000 -6,923,000 7,376,000 556,000          844,000 
          non-cash financing activities:
                                                   
          capital lease additions
                                    37,230,000 26,308,000            705,000 
          accrued deferred loan costs
                                    -103,000 -1,153,000              
          insurance premium and software notes payable
                                        5,865,000           
          non-cash distribution to central stockholders in satisfaction of stockholders' loans receivable, pre-acquisition
                                                  
          non-cash exercise of central stock options in exchange for stockholders' loans receivable, pre-acquisition
                                                  
          cancellation of central stockholders' loans receivable at closing of acquisition
                                                  
          provision for losses on accounts receivable
                                                   
          decrease in restricted cash
                                       3,821,000 -457,000 -7,682,000 2,773,000 6,211,000        
          change in restricted investments
                                    498,000 477,000 51,000 -164,000 -1,639,000 2,780,000 2,393,000 -7,073,000        
          funding of note receivable
                                                 
          other investing activities
                                            -500,000    
          proceeds from exercise of stock options and issuance of employee stock purchase plan shares
                                                   
          income tax benefit (deficiency) from exercise of stock options
                                                   
          other financing activities
                                          3,293,000 2,385,000 85,000 -1,132,000   -112,000   
          notes payable from purchase of revenue equipment
                                                   
          benefit from allowance for losses on accounts receivable
                                     437,000 812,000 792,000  -737,000     875,000 138,000    
          loss on debt extinguishment
                                     2,854,000 6,990,000 2,913,000 496,000 5,044,000 952,000 327,000 20,940,000    
          proceeds from exercise of stock options and the issuance of employee stock purchase plan shares
                                     1,776,000 2,397,000 3,414,000 3,523,000           
          income tax benefit from exercise of stock options
                                     194,000 757,000 1,078,000            
          supplemental disclosure of cash flow information:
                                                   
          supplemental schedule of:
                                                   
          insurance premium note payable
                                     37,000            
          benefit from (reduction of) allowance for losses on accounts receivable
                                            -484,000     -64,000 85,000 
          proceeds from issuance of class a common stock, net of issuance costs
                                                62,994,000 
          (reduction of) benefit from allowance for losses on accounts receivable
                                           -193,000        
          impairment of property and equipment , note receivable and other assets
                                                   
          interest rate swap liability
                                                   
          decrease (increase) in restricted cash
                                              3,838,000 10,718,000    
          change in fixed maturity securities-restricted
                                            -4,059,000 -3,604,000 -3,526,000 -11,086,000    
          proceeds from issuance of senior notes
                                                   
          payoff of term loan
                                                   
          repurchase of fixed rate notes
                                                   
          repurchase of floating rate notes
                                                   
          payment of fees and costs on note tender offer
                                                   
          payments received on stockholder loan from affiliate
                                                   
          tax distributions on behalf of stockholders
                                                   
          re-recognition of securitized accounts receivable
                                                   
          note payable from purchase of revenue equipment
                                                   
          insurance premium notes payable
                                                   
          cancellation of senior notes
                                                   
          cancellation of stockholder loan
                                                   
          paid-in-kind interest on stockholder loan
                                                   
          accrued deferred loan costs and stock issuance costs
                                                   
          impairment of property and equipment
                                             1,065,000    
          funding of gti note receivable
                                               -7,500,000    
          income tax deficiency from exercise of stock options
                                               -111,000    
          reduction of allowance for losses on accounts receivable
                                                   
          reduction in stockholder loan
                                                   
          payments received on shareholder loan from affiliate
                                                   
          depreciation and amortization of property, equipment, intangibles, and debt issuance costs
                                                   
          impairment of goodwill, property and equipment and note receivable and write-off of investment
                                                   
          (gain) loss on securitization
                                                   
          repayment of short-term notes payable
                                                   
          distributions to stockholders
                                                   
          interest payments received on stockholder loan receivable
                                                   
          effect of exchange rate changes on cash and cash equivalents
                                                   
          cash paid (refunded) during the period for:
                                                   
          sale of accounts receivable securitization facility, net of retained interest in receivables
                                                   
          deferred operating lease payment notes payable