7Baggers

Saia, Inc
(NASDAQ:SAIA) 

SAIA stock logo

Saia, Inc., through its subsidiaries, operates as a transportation company in North America. The company provides less-than-truckload services for shipments between 100 and 10,000 pounds; and other value-added services, including non-asset truckload, expedited, and logistics services. As of December...

Founded: 1924
Full Time Employees: 10,400
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 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 
                                                                                                   
      operating revenue
    806,226,000 789,952,000 839,644,000 817,115,000 787,575,000 788,952,000 842,103,000 823,244,000 754,775,000 751,132,000 775,144,000 694,622,000 660,535,000 655,726,000 729,561,000 745,554,000 661,216,000 617,081,000 616,216,000 571,333,000 484,074,000 476,482,000 481,374,000 418,114,000 446,396,000 443,065,000 468,891,000 464,195,000 410,584,000 406,750,000 425,562,000 428,732,000 392,805,000 353,251,000 350,062,000 358,160,000 317,037,000 300,223,000 316,442,000 311,905,000 289,911,000 287,610,000 317,199,000 323,480,000 293,022,000 309,648,000 332,544,000 330,399,000 299,730,000 279,655,000 293,087,000 292,557,000 273,795,000 264,427,000 278,024,000 287,538,000 268,690,000 253,020,000 268,285,000 265,901,000 243,018,000 224,432,000 234,662,000 231,342,000 212,224,000 202,401,000 222,205,000 218,433,000 206,102,000 230,861,000 274,181,000 276,050,000 249,329,000 243,711,000 247,823,000 252,762,000 231,827,000 219,161,000 226,118,000 224,814,000 287,330,000 288,320,000 284,537,000 271,886,000 253,288,000 251,938,000 256,824,000 248,232,000 225,276,000 207,456,000 211,530,000 208,263,000 200,110,000 194,255,000 201,155,000 
      operating expenses:
                                                                                                   
      salaries, wages and employees' benefits
    393,296,000 295,322,250 401,058,000 390,975,000 389,256,000 278,021,750 398,134,000 372,240,000 341,713,000 238,862,250 344,605,000 311,888,000 298,956,000 220,440,500 297,247,000 295,052,000 289,463,000 197,577,500 277,087,000 268,786,000 244,437,000 178,753,500 252,092,000 224,277,000 238,645,000                                                                       
      purchased transportation
    64,328,000 57,718,000 59,329,000 57,699,000 59,849,000 58,168,000 65,584,000 61,047,000 52,507,000 65,444,000 76,746,000 49,771,000 46,727,000 60,377,000 85,452,000 91,819,000 78,248,000 70,005,000 72,193,000 62,481,000 45,031,000 44,851,000 40,053,000 26,406,000 30,059,000 31,565,000 35,843,000 34,154,000 28,418,000 28,659,000 31,216,000 34,113,000 29,916,000 21,270,000 23,074,000 22,363,000 14,775,000 13,890,000 15,657,000 14,315,000 12,467,000 13,399,000 19,314,000 20,184,000 17,714,000 22,214,000 27,479,000 27,926,000 21,991,000 17,952,000 18,914,000 19,338,000 16,771,000 15,350,000 18,810,000 21,052,000 19,309,000 18,095,000 23,345,000 24,653,000 21,066,000 19,796,000 21,617,000 22,011,000 17,435,000 15,358,000 18,004,000 17,505,000 13,861,000 16,748,000 21,026,000 21,704,000 18,983,000 20,172,000 20,710,000 19,073,000 16,167,000 16,460,000 18,461,000 18,101,000 25,344,000 27,661,000 26,656,000 23,802,000 21,016,000 23,282,000 25,241,000 23,424,000 20,152,000 19,124,000 20,927,000 22,384,000 19,116,000 14,715,250 20,854,000 
      fuel, operating expenses and supplies
    173,489,000 160,676,000 165,727,000 161,634,000 166,671,000 153,467,000 158,733,000 160,877,000 156,325,000 144,291,000 144,282,000 133,490,000 141,625,000 144,694,000 145,461,000 145,530,000 122,771,000 107,505,000 98,834,000 90,664,000 84,901,000 76,327,000 74,106,000 65,902,000 82,899,000 86,926,000 84,259,000 85,328,000 83,543,000 79,818,000 81,643,000 84,745,000 78,794,000 71,329,000 66,679,000 66,092,000 63,990,000 57,953,000 59,345,000 59,026,000 54,040,000 59,955,000 65,122,000 69,165,000 67,145,000 73,347,000 80,206,000 81,276,000 79,959,000 73,405,000 75,803,000 78,154,000 79,002,000 74,964,000 76,461,000 77,354,000 79,397,000 71,897,000 75,510,000 76,186,000 69,941,000 60,502,000 58,987,000 58,380,000 55,902,000 51,548,000 52,340,000 47,734,000 45,486,000 54,455,000 78,895,000 79,940,000 66,474,000 62,196,000 58,699,000 55,910,000 50,394,000 45,946,000 48,997,000 48,758,000                
      operating taxes and licenses
    22,232,000 20,769,000 20,867,000 22,014,000 20,437,000 20,727,000 19,942,000 19,693,000 19,766,000 18,002,000 17,018,000 17,457,000 17,065,000 15,011,000 16,261,000 15,979,000 16,573,000 15,626,000 14,572,000 14,559,000 14,338,000 14,094,000 14,061,000 13,743,000 14,396,000 14,032,000 13,634,000 13,529,000 13,202,000 12,779,000 12,366,000 12,794,000 12,150,000 11,242,000 10,631,000 10,875,000 10,582,000 9,798,000 10,061,000 10,126,000 10,040,000 9,238,000 9,258,000 9,411,000 9,096,000 9,027,000 9,033,000 8,993,000 8,975,000 8,530,000 9,074,000 9,330,000 9,579,000 9,222,000 9,445,000 9,750,000 9,866,000 9,441,000 9,830,000 9,600,000 9,357,000 9,301,000 9,293,000 9,173,000 9,214,000 8,708,000 8,905,000 8,862,000 8,990,000 8,341,000 8,970,000 9,083,000 8,963,000 8,765,000 8,626,000 8,762,000 8,321,000 7,341,000 6,860,000 7,303,000 11,291,000 10,580,000 10,531,000 10,608,000 10,427,000 9,941,000 9,583,000 9,353,000 9,140,000 8,245,000 8,127,000 8,008,000 8,051,000 5,816,250 7,778,000 
      claims and insurance
    22,902,000 24,803,000 23,614,000 22,826,000 21,545,000 22,084,000 19,274,000 18,828,000 17,463,000 18,945,000 18,024,000 16,956,000 14,059,000 15,661,000 15,988,000 14,216,000 10,736,000 17,019,000 15,518,000 17,328,000 11,480,000 9,109,000 11,938,000 18,293,000 10,421,000 12,537,000 7,850,000 13,156,000 9,530,000 8,339,000 9,985,000 9,910,000 10,191,000 9,152,000 8,535,000 10,426,000 9,049,000 10,676,000 9,988,000 10,880,000 8,081,000 6,488,000 9,146,000 6,361,000 4,837,000 6,912,000 6,956,000 14,177,000 9,518,000 7,409,000 6,607,000 5,883,000 5,595,000 6,303,000 6,133,000 6,102,000 6,174,000 10,213,000 6,766,000 7,836,000 7,252,000 5,377,000 5,997,000 5,411,000 5,085,000 5,795,000 7,343,000 9,063,000 7,611,000 8,117,000 7,824,000 7,474,000 9,444,000 8,493,000 10,000,000 9,463,000 8,799,000 7,338,000 7,652,000 6,793,000 8,904,000 6,856,000 7,107,000 10,232,000 8,450,000 6,687,000 6,074,000 8,516,000 6,481,000 6,070,000 5,979,000 6,706,000 6,636,000 4,300,250 5,439,000 
      depreciation and amortization
    62,190,000 62,947,000 64,037,000 62,546,000 59,043,000 54,064,000 54,656,000 52,536,000 48,849,000 45,689,000 45,618,000 44,658,000 42,880,000 39,625,000 40,682,000 36,944,000 39,952,000 35,927,000 35,742,000 34,659,000 35,372,000 34,177,000 34,224,000 33,664,000 32,590,000 31,877,000 31,333,000 29,143,000 26,782,000 27,188,000 26,694,000 25,241,000 23,030,000 22,495,000 22,338,000 22,182,000 20,087,000 19,330,000 19,927,000 19,740,000 17,243,000 16,495,000 16,765,000 16,561,000 15,199,000 14,758,000 15,336,000 15,087,000 13,841,000 13,799,000 13,745,000 12,386,000 11,634,000 12,304,000 12,315,000 11,951,000 11,415,000 10,179,000 9,723,000 8,803,000 8,573,000 8,686,000 8,946,000 9,222,000 9,305,000 9,523,000 9,797,000 9,991,000 10,031,000 10,057,000 10,299,000 10,375,000 10,167,000 10,083,000 9,785,000 9,796,000 9,020,000 8,861,000 8,260,000 7,845,000 12,313,000 12,075,000 12,253,000 12,207,000 11,669,000 12,011,000 12,180,000 12,154,000 11,622,000 11,124,000 11,074,000 10,985,000 10,855,000 8,429,250 11,359,000 
      other operating losses
    983,000                                                                                               
      total operating expenses
    739,420,000 725,929,000 721,034,000 717,716,000 717,407,000 687,468,000 716,932,000 685,651,000 636,863,000 638,469,000 646,709,000 574,367,000 561,392,000 563,035,000 601,206,000 599,561,000 557,767,000 519,696,000 510,099,000 488,408,000 435,360,000 425,834,000 426,158,000 382,433,000 407,620,000 415,635,000 423,532,000 413,029,000 381,953,000 373,414,000 386,865,000 387,167,000 365,226,000 330,353,000 325,460,000 328,442,000 299,518,000 283,036,000 293,798,000 290,184,000 272,327,000 269,994,000 297,354,000 292,199,000 271,789,000 289,076,000 305,395,000 307,658,000 284,499,000 264,963,000 271,152,000 269,298,000 259,263,000 254,349,000 261,608,000 266,346,000 257,642,000 246,840,000 258,665,000 257,645,000 238,928,000 222,628,000 228,115,000 225,468,000 214,349,000 205,994,000 214,453,000 218,832,000 213,555,000 261,098,000 266,647,000 265,180,000 247,347,000 239,835,000 235,170,000 238,183,000 224,767,000 208,707,000 212,163,000 207,791,000 281,042,000 269,033,000 270,663,000 259,645,000 244,049,000 242,799,000 243,308,000 236,841,000 218,488,000       
      operating income
    66,806,000 64,023,000 118,610,000 99,399,000 70,168,000 101,484,000 125,171,000 137,593,000 117,912,000 112,663,000 128,435,000 120,255,000 99,143,000 92,691,000 128,355,000 145,993,000 103,449,000 97,385,000 106,117,000 82,925,000 48,714,000 50,648,000 55,216,000 35,681,000 38,776,000 27,430,000 45,359,000 51,166,000 28,631,000 33,336,000 38,697,000 41,565,000 27,579,000 22,898,000 24,602,000 29,718,000 17,519,000 17,187,000 22,644,000 21,721,000 17,584,000 17,616,000 19,845,000 31,281,000 21,233,000 85,673,000 32,000 22,741,000 15,231,000 14,692,000 21,935,000 23,259,000 14,532,000 10,078,000 16,416,000 21,192,000 11,048,000 6,180,000 9,620,000 8,256,000 4,090,000 1,804,000 6,547,000 5,874,000 -2,125,000 -3,593,000 7,752,000 -399,000 -7,453,000 -30,237,000 7,534,000 10,870,000 1,982,000 3,876,000 12,653,000 14,579,000 7,060,000 10,454,000 13,955,000 17,023,000 6,288,000 19,287,000 13,874,000 12,241,000 9,239,000 9,139,000 13,516,000 11,391,000 6,788,000 8,304,000 11,158,000 8,905,000 4,516,000   
      yoy
    -4.79% -36.91% -5.24% -27.76% -40.49% -9.92% -2.54% 14.42% 18.93% 21.55% 0.06% -17.63% -4.16% -4.82% 20.96% 76.05% 112.36% 92.28% 92.19% 132.41% 25.63% 84.64% 21.73% -30.26% 35.43% -17.72% 17.22% 23.10% 3.81% 45.58% 57.29% 39.86% 57.42% 33.23% 8.65% 36.82% -0.37% -2.44% 14.10% -30.56% -17.19% -79.44% 61915.63% 37.55% 39.41% 483.13% -99.85% -2.23% 4.81% 45.78% 33.62% 9.75% 31.54% 63.07% 70.64% 156.69% 170.12% 242.57% 46.94% 40.55% -292.47% -150.21% -15.54% -1572.18% -71.49% -88.12% 2.89% -103.67% -476.03% -880.11% -40.46% -25.44% -71.93% -62.92% -9.33% -14.36% 12.28% -45.80% 0.58% 39.07% -31.94% 111.04% 2.65% 7.46% 36.11% 10.06% 21.13% 27.92% 50.31%       
      qoq
    4.35% -46.02% 19.33% 41.66% -30.86% -18.92% -9.03% 16.69% 4.66% -12.28% 6.80% 21.29% 6.96% -27.79% -12.08% 41.13% 6.23% -8.23% 27.97% 70.23% -3.82% -8.27% 54.75% -7.98% 41.36% -39.53% -11.35% 78.71% -14.11% -13.85% -6.90% 50.71% 20.44% -6.93% -17.22% 69.63% 1.93% -24.10% 4.25% 23.53% -0.18% -11.23% -36.56% 47.32% -75.22% 267628.13% -99.86% 49.31% 3.67% -33.02% -5.69% 60.05% 44.20% -38.61% -22.54% 91.82% 78.77% -35.76% 16.52% 101.86% 126.72% -72.45% 11.46% -376.42% -40.86% -146.35% -2042.86% -94.65% -75.35% -501.34% -30.69% 448.44% -48.86% -69.37% -13.21% 106.50% -32.47% -25.09% -18.02% 170.72% -67.40% 39.02% 13.34% 32.49% 1.09% -32.38% 18.66% 67.81% -18.26% -25.58% 25.30% 97.19%    
      nonoperating expenses:
                                                                                                   
      interest expense
    2,574,000 2,934,000 4,483,000 4,742,000 4,285,000 2,979,000 2,997,000 2,412,000 542,000 935,000 454,000 458,000 688,000 670,000 581,000 668,000 692,000 749,000 777,000 834,000 852,000 1,007,000 1,174,000 1,594,000 1,402,000 1,534,000 1,868,000 1,903,000 1,383,000 1,328,000 1,410,000 1,454,000 1,226,000 1,289,000 1,313,000 1,538,000 911,000 984,000 1,183,000 1,264,000 963,000 981,000 1,033,000 1,074,000 1,019,000 1,007,000 1,064,000 1,177,000 1,316,000 1,584,000 1,760,000 1,618,000 1,528,000 1,707,000 1,941,000 2,195,000 1,964,000 2,321,000 2,194,000 2,955,000 2,998,000 2,375,000 2,469,000 2,685,000 3,073,000 3,787,000 3,053,000 2,514,000 2,802,000 3,261,000 2,892,000 3,102,000 3,186,000 2,935,000 2,644,000 2,352,000 2,204,000 2,146,000 2,241,000 2,427,000 2,474,000 2,534,000 2,388,000 2,429,000 2,421,000 2,439,000 2,489,000 2,386,000 2,421,000 2,398,000 2,385,000 2,386,000 2,291,000 978,250 1,201,000 
      interest income
    -63,000 -34,000 -44,000 -34,000 -39,000 -139,000 -45,000 -110,000 -755,000 -3,158,000 -2,423,000 -487,000                                                                                    
      other
    -740,000 -312,000 -654,000 -873,000 357,000 -155,000 -460,000 -326,000 -788,000 -722,000 157,000 -990,000 -643,000 -1,243,000 68,000 769,000 235,000 -297,000 14,000 -430,000 -131,000 -539,000 -391,000 -751,000 547,000 -260,000 -20,000 -140,000 -334,000 310,000 -139,000 -142,000 -103,000 -149,000 -131,000 90,000 98,000 -30,000 -104,000 -36,000 -7,000 -76,000 46,000 -14,000 -51,000 -50,000 16,000 -35,000 -30,000 -37,000 -85,000 -29,000 -66,000 -70,000 -44,000 -3,000 -95,000 -64,000 122,000 -19,000 -91,000 -88,000 -95,000 63,000 -315,000 -48,000 -106,000 -75,000 21,000 269,000 155,000 -30,000 97,000 67,000 -60,000 -128,000 -152,000 485,000 -569,000 -28,000 -191,000 108,000 -137,000 -95,000 112,000 -27,000 -19,000 -51,000 -75,000 46,000 -90,000 -194,000 -34,000 38,250 77,000 
      nonoperating expenses
    1,771,000 3,055,750 3,785,000 3,835,000 4,603,000 866,750 2,492,000 1,976,000 -1,001,000 -696,500 -1,812,000 -1,019,000 45,000 753,250 649,000 1,437,000 927,000 479,000 791,000 404,000 721,000 468,000 783,000 843,000 1,949,000 1,274,000 1,848,000 1,763,000 1,049,000 1,638,000 1,271,000 1,312,000 1,123,000 1,140,000 1,182,000 1,628,000 1,009,000 954,000 1,079,000 1,228,000 956,000 905,000 1,079,000 1,060,000 968,000 957,000 1,080,000 1,142,000 1,286,000 1,547,000 1,675,000 1,589,000 1,462,000 1,637,000 1,897,000 2,192,000 1,869,000 2,257,000 2,316,000 2,936,000 2,907,000 2,287,000 2,374,000 2,748,000 2,758,000 3,739,000 2,947,000 2,439,000 2,823,000 3,458,000 3,047,000 3,072,000 3,283,000 2,916,000 2,584,000 2,224,000 2,052,000 1,661,000 1,672,000 2,399,000 2,283,000 2,135,000 2,251,000 2,334,000 2,533,000 2,273,000 2,470,000 2,335,000 2,346,000       
      income before income taxes
    65,035,000 61,435,000 114,825,000 95,564,000 65,565,000 98,799,000 122,679,000 135,617,000 118,913,000 115,608,000 130,247,000 121,274,000 99,098,000 93,264,000 127,706,000 144,556,000 102,522,000 96,933,000 105,326,000 82,521,000 47,993,000 50,180,000 54,433,000 34,838,000 36,827,000 26,156,000 43,511,000 49,403,000 27,582,000 31,698,000 37,426,000 40,253,000 26,456,000 21,758,000 23,420,000 28,090,000 16,510,000 16,233,000 21,565,000 20,493,000 16,628,000 16,711,000 18,766,000 30,221,000 20,265,000 19,615,000 26,069,000 21,599,000 13,945,000 13,145,000 20,260,000 21,670,000 13,070,000 8,441,000 14,519,000 19,000,000 9,179,000 3,451,750 7,304,000 5,320,000 1,183,000 604,000 4,173,000 3,126,000 -4,883,000 -2,077,250 4,805,000 -2,838,000 -10,276,000 2,746,000 4,487,000 7,798,000 -1,301,000 960,000 10,069,000 12,355,000 5,008,000 8,793,000 12,283,000 14,624,000 4,005,000 17,152,000 11,623,000 9,907,000 6,706,000 6,136,250 11,046,000 9,056,000 4,442,000       
      income tax provision
    15,166,000 17,109,250 28,509,000 24,173,000 15,755,000 22,811,750 29,931,000 33,098,000 28,218,000 21,247,500 32,034,000 29,955,000 23,001,000 22,056,000 29,815,000 35,311,000 23,098,000 14,091,500 25,617,000 20,047,000 10,702,000 6,998,500 12,894,000 6,384,000 8,716,000 7,049,000 10,543,000 12,330,000 5,323,000 6,133,500 9,231,000 9,972,000 5,331,000 6,155,750 9,013,000 10,487,000 5,123,000 5,252,500 7,739,000 7,218,000 6,053,000 6,405,750 6,989,000 10,974,000 7,660,000 5,797,750 9,791,000 8,031,000 5,369,000 4,859,250 7,352,000 8,170,000 3,915,000 4,014,000 5,263,000 7,149,000 3,644,000 1,226,750 2,475,000 1,962,000 470,000 291,000 1,678,000 1,146,000  -3,040,000 1,513,000 -1,091,000  -5,740,000 1,592,000 1,593,000 -468,000 251,000 4,120,000 4,951,000 1,985,000 3,484,000 4,602,000 5,658,000 1,634,000 6,437,000 4,641,000 4,117,000 2,734,000 2,239,000 4,494,000 3,583,000 1,835,000 1,523,000 3,733,000 2,790,000 933,000 2,249,000 2,813,000 
      net income
    49,869,000 47,519,000 86,316,000 71,391,000 49,810,000 76,103,000 92,748,000 102,519,000 90,695,000 89,228,000 98,213,000 91,319,000 76,097,000 70,862,000 97,891,000 109,245,000 79,424,000 73,761,000 79,709,000 62,474,000 37,291,000 40,236,000 41,539,000 28,454,000 28,111,000 21,419,000 32,968,000 37,073,000 22,259,000 25,380,000 28,195,000 30,281,000 21,125,000 47,759,000 14,407,000 17,603,000 11,387,000 10,348,000 13,826,000 13,275,000 10,575,000 11,387,000 11,777,000 19,247,000 12,605,000 13,569,000 16,278,000 13,568,000 8,576,000 8,064,000 12,908,000 13,500,000 9,155,000 5,406,000 9,256,000 11,851,000 5,535,000 2,473,000 4,829,000 3,358,000 713,000 705,000 2,495,000 1,980,000 -3,223,000 -3,131,000 3,292,000 -1,747,000 -6,289,000 -27,999,000 2,772,000 5,333,000 -833,000 1,966,000 5,949,000 7,404,000 3,023,000 5,202,000 7,683,000 -35,937,000 2,371,000 10,715,000 6,982,000 5,790,000 3,972,000 4,627,000 6,552,000 5,473,000 2,607,000 4,554,000 5,130,000 3,923,000 1,326,000 3,032,000 4,005,000 
      yoy
    0.12% -37.56% -6.93% -30.36% -45.08% -14.71% -5.56% 12.26% 19.18% 25.92% 0.33% -16.41% -4.19% -3.93% 22.81% 74.86% 112.98% 83.32% 91.89% 119.56% 32.66% 87.85% 26.00% -23.25% 26.29% -15.61% 16.93% 22.43% 5.37% -46.86% 95.70% 72.02% 85.52% 361.53% 4.20% 32.60% 7.68% -9.12% 17.40% -31.03% -16.10% -16.08% -27.65% 41.86% 46.98% 68.27% 26.11% 0.50% -6.32% 49.17% 39.46% 13.91% 65.40% 118.60% 91.68% 252.92% 676.30% 250.78% 93.55% 69.60% -122.12% -122.52% -24.21% -213.34% -48.75% -88.82% 18.76% -132.76% 654.98% -1524.16% -53.40% -27.97% -127.56% -62.21% -22.57% -120.60% 27.50% -51.45% 10.04% -720.67% -40.31% 131.58% 6.56% 5.79% 52.36% 1.60% 27.72% 39.51% 96.61% 50.20% 28.09%     
      qoq
    4.95% -44.95% 20.91% 43.33% -34.55% -17.95% -9.53% 13.04% 1.64% -9.15% 7.55% 20.00% 7.39% -27.61% -10.39% 37.55% 7.68% -7.46% 27.59% 67.53% -7.32% -3.14% 45.99% 1.22% 31.24% -35.03% -11.07% 66.55% -12.30% -9.98% -6.89% 43.34% -55.77% 231.50% -18.16% 54.59% 10.04% -25.16% 4.15% 25.53% -7.13% -3.31% -38.81% 52.69% -7.10% -16.64% 19.97% 58.21% 6.35% -37.53% -4.39% 47.46% 69.35% -41.59% -21.90% 114.11% 123.82% -48.79% 43.81% 370.97% 1.13% -71.74% 26.01% -161.43% 2.94% -195.11% -288.44% -72.22% -77.54% -1110.06% -48.02% -740.22% -142.37% -66.95% -19.65% 144.92% -41.89% -32.29% -121.38% -1615.69% -77.87% 53.47% 20.59% 45.77% -14.16% -29.38% 19.71% 109.93% -42.75% -11.23% 30.77% 195.85% -56.27% -24.29%  
      weighted-average common shares outstanding – basic
    26,764,000 26,738,000 26,745,000 26,739,000 26,720,000 26,689,000 26,695,000 26,691,000 26,672,000 26,632,000 26,644,000 26,634,000 26,600,000 26,520,000 26,539,000 26,507,000 26,391,000 26,322,000 26,334,000 26,332,000 26,285,000 26,140,000 26,150,000 26,134,000 26,070,000 25,952,000 25,978,000 25,958,000 25,873,000 25,762,000 25,792,000 25,766,000 25,698,000 25,518,000 25,527,000 25,501,000 25,225,000 25,038,000 25,038,000 25,030,000 24,998,000 24,919,000 24,963,000 24,936,000 24,803,000  24,527,000 24,484,000 24,382,000  24,220,000  15,990,000  15,900,000 15,885,000 15,833,000                  13,651,000 14,135,000 14,237,000                   
      weighted-average common shares outstanding – diluted
    26,807,000 26,786,000 26,790,000 26,785,000 26,788,000 26,802,000 26,789,000 26,802,000 26,794,000 26,763,000 26,779,000 26,736,000 26,702,000 26,674,000 26,676,000 26,665,000 26,670,000 26,707,000 26,713,000 26,704,000 26,671,000 26,592,000 26,615,000 26,569,000 26,492,000 26,435,000 26,460,000 26,406,000 26,322,000 26,291,000 26,354,000 26,354,000 26,308,000 26,086,000 26,113,000 26,000,000 25,971,000 25,680,000 25,658,000 25,583,000 25,445,000 25,471,000 25,555,000 25,561,000 25,513,000  25,505,000 25,447,000 25,361,000  25,269,000  16,632,000  16,575,000 16,514,000 16,358,000                  13,861,000 14,405,000 14,493,000                   
      basic earnings per share
    1.86 1.78 3.23 2.67 1.86 2.85 3.47 3.84 3.4 3.34 3.69 3.43 2.86 2.67 3.69 4.12 3.01 2.8 3.03 2.37 1.42 1.53 1.59 1.09 1.08 0.82 1.27 1.43 0.86 0.99 1.09 1.18 0.82 1.87 0.56 0.69 0.45 0.41 0.55 0.53 0.42 0.46 0.47 0.77 0.51 0.55 0.66 0.55 0.35 0.34 0.53 0.56 0.57 0.34 0.58 0.75 0.35 0.16 0.31 0.21 0.05 0.04 0.16 0.13  -0.23 0.25 -0.13  -2.11 0.21 0.4 -0.06 0.16 0.44 0.52 0.21 0.36 0.53 -2.47 0.16 0.74 0.48 0.39 0.26 0.248 0.44 0.37 0.18       
      diluted earnings per share
    1.86 1.77 3.22 2.67 1.86 2.83 3.46 3.83 3.38 3.33 3.67 3.42 2.85 2.65 3.67 4.1 2.98 2.76 2.98 2.34 1.4 1.51 1.56 1.07 1.06 0.81 1.25 1.4 0.85 0.97 1.07 1.15 0.8 1.82 0.55 0.68 0.44 0.4 0.54 0.52 0.42 0.45 0.46 0.75 0.49 0.53 0.64 0.53 0.34 0.32 0.51 0.54 0.55 0.33 0.56 0.72 0.34 0.15 0.3 0.21 0.04 0.04 0.16 0.12  -0.23 0.24 -0.13  -2.1 0.2 0.4 -0.06 0.16 0.43 0.51 0.21 0.35 0.52 -2.42 0.16 0.72 0.47 0.38 0.26 0.24 0.43 0.36 0.17       
      other operating
     -3,242,500 -13,598,000 22,000 606,000 319,750 609,000 430,000 240,000 160,750 416,000 147,000 80,000                                                                                   
      loss from property disposals
                 40,000 115,000 21,000 24,000   -69,000  -389,500 -316,000 148,000 -1,390,000 151,750 451,000 30,000 126,000 76,250 326,000 -42,000 21,000 -117,250 -717,000 116,000 132,000                                                           
      gain from property disposals
                     -1,028,750 -3,847,000  -199,000                                                                           
      salaries, wages and employees’ benefits
                             239,708,000 250,162,000 237,689,000 220,352,000 216,557,000 224,635,000 220,406,000 211,124,000 194,579,000 194,920,000 196,388,000 180,903,000 171,169,000 178,687,000 175,924,000 170,266,000 164,356,000 177,623,000 170,465,000 157,729,000 162,854,000 166,353,000 160,204,000 150,222,000 144,019,000 147,305,000 144,309,000 136,854,000 136,284,000 138,532,000 140,239,000 131,700,000 127,108,000 133,460,000 130,669,000 122,740,000 119,014,000 123,298,000 121,421,000 117,464,000 115,106,000 118,053,000 125,679,000 127,635,000 127,894,000 139,745,000 136,871,000 133,347,000 130,297,000 129,261,000 135,237,000 129,804,000 120,968,000 122,421,000 117,502,000 158,733,000 154,475,000 152,651,000 146,831,000 140,687,000 141,211,000 143,074,000 137,283,000 127,943,000 117,513,000 119,054,000 116,003,000 113,144,000 82,629,000 112,604,000 
      operating losses
                                         220,000 133,000 173,000 190,000 63,000 126,000 52,000 69,000                                                   
      operating gains
                                                   -5,000 -7,000 -151,000 -296,000 -102,000 -172,000 -78,000 -88,000 -102,000 -219,000   -102,000 -1,000   -150,000 -56,000   -2,000 -59,000 -25,000 -112,000 -267,000 -31,000 -171,000 -1,911,000 -58,000 -165,000                   
      weighted-average common shares outstanding — basic
                                                 24,505,000    24,154,000  24,163,000  15,882,000    15,789,000 15,800,000 15,791,000 15,768,000 15,713,000 15,719,000 15,703,000 15,697,000 13,423,000 13,363,000 13,344,000 13,345,000 13,316,000 13,328,000 13,290,000 13,299,000 13,823,000    14,536,000                  
      weighted-average common shares outstanding — diluted
                                                 25,463,000    25,205,000  25,218,000  16,543,000    16,136,000 16,160,000 16,188,000 16,119,000 16,115,000 16,094,000 16,124,000 15,697,000 13,423,000 13,867,000 13,344,000 13,345,000 13,316,000 13,561,000 13,484,000 13,299,000 14,038,000    14,841,000                  
      operating (gains) loss
                                                             -18,000 31,000                                     
      operating (gains)/loss
                                                                 -57,250 -23,000   -12,500 11,000                             
      income tax benefit
                                                                    -1,660,000    -3,987,000                           
      basic loss per share
                                                                    -0.21    -0.47                           
      diluted loss per share
                                                                    -0.21    -0.47                           
      income from continuing operations
                                                                     -4,292,000 3,292,000 -1,747,000  -27,955,000 2,895,000 6,205,000  709,000 5,949,000 7,404,000 3,023,000 5,309,000 7,681,000 8,966,000                
      loss from discontinued operations
                                                                         -248,500 -123,000 -872,000                        
      basic earnings per share-continuing operations
                                                                     -0.09 0.25 -0.13  0.155 0.22 0.47  0.293 0.44 0.52 0.21 0.353 0.53 0.61                
      diluted earnings per share-continuing operations
                                                                     -0.09 0.24 -0.13  0.153 0.21 0.46  0.288 0.43 0.51 0.21 0.345 0.52 0.6                
      basic loss per share-discontinued operations
                                                                         -0.018 -0.01 -0.07                        
      diluted loss per share-discontinued operations
                                                                         -0.018 -0.01 -0.06                        
      integration charges
                                                                                2,427,000           1,050,000 1,004,000       
      restructuring charges
                                                                                 538,000 369,000 1,680,000                
      income from discontinued operations
                                                                                 -11,611,750 2,000 -44,903,000                
      restructing charges
                                                                                                   
      basic earnings per share-discontinued operations
                                                                                 -0.798  -3.08                
      diluted earnings per share-discontinued operations
                                                                                 -0.78  -3.02                
      operating (gains) and losses
                                                                                 -295,250 -857,000 -191,000 -384,000 -7,381,000 -378,000 -583,000 -334,000 -1,333,000 -1,305,000 -437,000 9,000 -116,000 45,000 81,000 -23,000 123,750 233,000 
      average common shares outstanding – basic
                                                                                 3,639,250 14,612,000 14,557,000  -108,000 14,499,000   28,000 14,910,000 14,837,000 14,741,000   14,665,000 14,685,000   
      average common shares outstanding – diluted
                                                                                 3,718,500 14,906,000 14,873,000  -110,000 14,828,000   12,000 15,345,000 15,312,000 15,239,000   15,083,000 15,094,000   
      operating expenses and supplies
                                                                                    64,841,000 64,767,000 61,843,000 56,548,000 52,134,000 51,000,000 48,461,000 45,498,000 42,137,000 37,192,000 35,166,000 35,191,000 37,815,000 24,345,500 34,792,000 
      average common shares outstanding - basic
                                                                                    14,499,000               
      average common shares outstanding - diluted
                                                                                    14,842,000               
      average common shares outstanding — basic
                                                                                       14,892,000 15,059,000     3,680,500 14,750,000     
      average common shares outstanding — diluted
                                                                                       15,217,000 15,419,000     3,777,000 15,147,000     
      income before income taxes and cumulative effect of accounting change
                                                                                             6,077,000 8,863,000 6,713,000 2,259,000 5,281,000 6,818,000 
      income before cumulative effect of accounting change
                                                                                             4,554,000 5,130,000 3,923,000 1,326,000 3,032,000 4,005,000 
      cumulative effect of change in accounting for goodwill
                                                                                                   
      basic earnings per share:
                                                                                                   
      diluted earnings per share:
                                                                                                   
      income from operations
                                                                                                 4,936,000 8,096,000 
      average common shares outstanding — basic and diluted
                                                                                                 3,641,250 14,565,000 
      basic and diluted earnings per share:
                                                                                                   
      before cumulative effect of accounting change
                                                                                                 0.155 0.27 
    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 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 
                                                                                                     
        assets
                                                                                                     
        current assets:
                                                                                                     
        cash and cash equivalents
      39,177,000 19,720,000 35,500,000 18,837,000 16,535,000 19,473,000 14,405,000 11,169,000 12,308,000 296,215,000 249,262,000 234,997,000 166,425,000 187,390,000 149,825,000 137,871,000 141,325,000 106,588,000 121,702,000 52,860,000 53,260,000 25,308,000 25,469,000 29,280,000 46,909,000 248,000 15,000 503,000 31,000 2,194,000 529,000 1,189,000 496,000 4,720,000 81,000 399,000 711,000 1,539,000 789,000 360,000 238,000 124,000 4,540,000 3,663,000 196,000 4,367,000 7,244,000 1,788,000 842,000 159,000 4,060,000 2,872,000 437,000 321,000 804,000 826,000 60,000 1,317,000 3,522,000 10,716,000 22,001,000 29,045,000 27,208,000 13,629,000 6,372,000 8,746,000 18,203,000 10,422,000 11,950,000 27,061,000 21,134,000 5,565,000 5,332,000 6,656,000 3,771,000 6,279,000 6,968,000 10,669,000 47,816,000 47,602,000 5,219,000 16,865,000 3,943,000 8,353,000 10,809,000 7,499,000 23,787,000 21,024,000 5,945,000 30,870,000 31,280,000 32,316,000 23,135,000 21,872,000  
        accounts receivable
      376,967,000  365,343,000 347,196,000 351,106,000  372,396,000 375,868,000 345,808,000  345,940,000 299,551,000 294,917,000  335,595,000 357,052,000 322,343,000  295,862,000 261,113,000 242,895,000  226,677,000 205,131,000 210,894,000  218,000,000 227,046,000 202,133,000  197,973,000 200,644,000 191,437,000  172,119,000 167,012,000 148,968,000  143,461,000 142,331,000 137,607,000  139,041,000 146,202,000 140,330,000  146,597,000 148,850,000 141,917,000  127,542,000 130,929,000 126,597,000  124,822,000 123,697,000 120,743,000  115,166,000 114,661,000 110,672,000  104,473,000 101,435,000 99,211,000  97,444,000 96,733,000 96,320,000  121,533,000 127,690,000 116,352,000  118,156,000 114,695,000 105,532,000  95,002,000 95,959,000 130,531,000  141,927,000 122,266,000 114,801,000  118,695,000 112,901,000 110,453,000  98,079,000 94,673,000 94,410,000  99,233,000 
        prepaid expenses
      62,043,000 35,809,000 34,830,000 45,800,000 55,406,000 35,497,000 35,746,000 42,762,000 51,231,000 32,648,000 28,485,000 36,515,000 38,635,000 22,525,000    20,329,000    19,505,000    18,542,000    20,621,000                                        8,161,000    7,316,000    9,251,000    12,114,000    13,628,000    10,824,000    9,724,000  
        income tax receivable
      6,267,000 32,554,000 48,796,000 24,819,000 33,917,000 44,107,000 8,329,000 7,165,000  1,005,000 14,434,000 1,442,000 6,391,000 23,438,000 11,859,000 9,412,000    1,598,000  96,000  1,150,000 6,542,000 8,288,000    1,825,000    3,664,000    6,989,000    15,745,000    18,335,000    13,497,000    2,264,000    3,312,000    5,449,000    8,096,000        7,213,000            6,592,000          
        other current assets
      14,938,000 14,267,000 12,525,000 14,498,000 12,640,000 13,701,000 6,471,000 9,097,000 6,913,000 7,084,000 7,472,000 6,364,000 7,146,000 7,227,000    12,583,000    9,888,000    9,182,000    7,121,000    7,047,000    5,499,000    4,701,000    5,420,000    5,083,000    4,341,000    5,127,000    4,887,000    5,514,000    5,404,000    6,246,000    6,204,000    5,935,000    4,778,000    3,823,000    4,304,000  
        total current assets
      499,392,000 434,556,000 496,994,000 451,150,000 469,604,000 435,769,000 437,347,000 446,061,000 416,260,000 648,694,000 645,593,000 578,869,000 513,514,000 530,886,000 551,402,000 536,376,000 510,666,000 416,255,000 450,609,000 353,881,000 348,315,000 271,696,000 280,117,000 269,643,000 305,908,000 232,379,000 249,709,000 261,389,000 241,087,000 213,373,000 224,657,000 232,687,000 225,999,000 203,581,000 200,599,000 197,630,000 184,648,000 166,479,000 166,402,000 172,141,000 175,435,000 158,989,000 185,737,000 193,997,000 196,018,000 189,636,000 193,460,000 194,515,000 186,368,000 170,253,000 169,153,000 167,402,000 159,619,000 144,163,000 156,741,000 151,692,000 150,018,000 142,816,000 147,999,000 155,396,000 163,355,000 153,496,000 160,074,000 152,743,000 145,586,000 134,553,000 157,193,000 150,509,000 151,416,000 156,034,000 179,441,000 185,759,000 164,261,000 151,609,000 155,140,000 151,261,000 143,390,000 133,684,000 174,833,000 180,651,000 172,021,000 174,245,000 180,084,000 160,814,000 158,324,000 153,264,000 173,271,000 168,556,000 152,132,000       
        property and equipment, at cost
      4,303,820,000 4,259,438,000 4,181,930,000 4,133,481,000 3,995,502,000 3,790,069,000 3,704,281,000 3,535,457,000 3,336,493,000 2,881,800,000 2,789,357,000 2,683,192,000 2,602,963,000 2,478,824,000 2,403,702,000 2,277,527,000 2,162,492,000 2,144,528,000 2,048,419,000 1,983,923,000 1,918,279,000 1,901,244,000 1,903,383,000 1,862,048,000 1,834,768,000 1,739,222,000 1,735,019,000 1,665,557,000 1,553,938,000 1,521,341,000 1,445,049,000 1,419,359,000 1,334,557,000 1,289,994,000 1,260,856,000 1,233,906,000 1,216,711,000 1,101,946,000 1,104,495,000 1,107,001,000 1,056,435,000 995,514,000 975,874,000 957,345,000 924,466,000 891,145,000 869,573,000 863,193,000 820,386,000 797,527,000 787,677,000 787,616,000 722,265,000 718,527,000 722,128,000 718,956,000 700,132,000 669,345,000 659,406,000 632,669,000 615,281,000 610,572,000 613,590,000 613,202,000 615,234,000 615,803,000 617,323,000 616,625,000 615,048,000 615,212,000 609,541,000 609,641,000 607,905,000 596,357,000 564,849,000 543,116,000 534,658,000 518,052,000 483,137,000 457,510,000 631,729,000 620,899,000 602,037,000 587,634,000 580,206,000 569,526,000 551,969,000 541,635,000 536,296,000 519,715,000 508,884,000 493,756,000 483,144,000 487,803,000  
        less: accumulated depreciation and amortization
      1,450,959,000  1,368,123,000 1,321,880,000 1,273,382,000  1,222,373,000 1,194,231,000 1,159,629,000  1,115,858,000                                                                                     
        net property and equipment
      2,852,861,000 2,844,351,000 2,813,807,000 2,811,601,000 2,722,120,000 2,556,935,000 2,481,908,000 2,341,226,000 2,176,864,000 1,763,308,000 1,673,499,000 1,607,553,000 1,568,314,000 1,482,620,000 1,439,169,000 1,352,899,000 1,271,565,000 1,280,454,000 1,202,224,000 1,156,940,000 1,121,768,000 1,136,027,000 1,141,119,000 1,118,703,000 1,121,886,000 1,052,599,000 1,041,124,000 991,337,000 905,530,000 893,058,000 835,725,000 824,681,000 760,858,000 735,780,000 722,791,000 713,224,000 712,387,000 604,119,000 611,918,000 625,913,000 589,223,000 539,179,000 532,544,000 527,647,000 507,195,000 483,640,000 472,115,000 474,152,000 443,278,000 432,226,000 421,879,000 418,270,000 360,901,000 361,704,000 368,800,000 372,194,000 357,145,000 324,455,000 318,823,000 297,492,000 287,739,000 290,938,000 297,360,000 304,780,000 314,021,000 323,360,000 332,730,000 339,194,000 346,698,000 355,802,000 358,623,000 367,412,000 371,173,000 368,772,000 343,212,000 326,089,000 325,089,000 314,832,000 286,040,000 265,821,000 348,282,000 345,533,000 332,188,000 325,788,000 324,675,000 320,612,000 305,363,000 299,955,000 299,560,000       
        operating lease right-of-use assets
      157,924,000 150,301,000 138,845,000 145,336,000 124,500,000 126,828,000 121,336,000 127,441,000 129,520,000 118,734,000 126,122,000 110,428,000 115,484,000 120,455,000 107,456,000 105,376,000 103,892,000 107,781,000 104,989,000 105,965,000 111,737,000 113,715,000 117,487,000 122,401,000 122,652,000 103,890,000 103,650,000 71,765,000 72,460,000                                                                   
        goodwill and identifiable intangibles
      15,376,000 15,589,000 15,802,000 16,016,000 16,229,000 16,442,000 16,656,000 16,869,000 17,082,000 17,296,000 17,509,000 17,722,000 17,936,000 18,149,000 18,362,000 18,576,000 18,866,000  19,448,000 19,739,000 20,030,000  20,611,000 20,902,000 21,193,000  21,775,000 22,066,000 22,356,000  23,005,000 23,346,000 23,686,000  24,368,000 24,709,000 25,054,000  25,815,000 26,232,000 26,649,000  27,381,000 29,420,000 30,987,000  8,328,000 8,481,000 8,635,000  8,943,000 9,098,000 9,250,000  9,558,000                                         
        other noncurrent assets
      38,084,000 37,884,000 35,512,000 33,623,000 32,768,000 30,883,000 24,877,000 25,525,000 25,988,000 35,533,000 22,596,000 22,539,000 27,551,000 22,600,000 23,935,000 34,628,000 27,360,000 21,603,000 11,989,000 10,870,000 8,735,000 7,015,000 6,346,000 6,551,000 5,620,000 5,341,000 6,014,000 5,563,000 5,424,000 4,648,000 4,705,000 5,244,000 5,004,000 4,259,000 4,961,000 4,767,000 5,107,000 4,374,000 4,477,000 4,621,000 4,398,000 4,039,000 5,325,000 5,275,000 5,323,000 4,995,000 5,591,000 5,543,000 5,564,000 5,533,000 5,700,000 5,747,000 5,284,000 4,417,000 7,163,000 6,673,000 6,383,000 6,165,000 5,630,000 5,616,000 5,671,000 5,883,000 5,750,000 5,720,000 6,111,000 6,247,000 4,156,000 2,913,000 783,000 865,000 951,000 904,000 1,008,000 872,000 921,000 867,000 1,173,000 1,382,000 969,000 938,000 2,539,000 2,769,000 2,080,000 2,128,000 1,444,000 1,623,000 1,796,000 1,727,000 1,856,000 1,739,000    2,013,000  
        total assets
      3,563,637,000 3,482,681,000 3,500,960,000 3,457,726,000 3,365,221,000 3,166,857,000 3,082,124,000 2,957,122,000 2,765,714,000 2,583,565,000 2,485,319,000 2,337,111,000 2,242,799,000 2,174,710,000 2,140,324,000 2,047,855,000 1,932,349,000 1,845,250,000 1,789,259,000 1,647,395,000 1,610,585,000 1,548,774,000 1,565,680,000 1,538,200,000 1,577,259,000 1,415,693,000 1,422,272,000 1,352,120,000 1,246,857,000 1,133,743,000 1,088,092,000 1,085,958,000 1,015,547,000 967,647,000 952,719,000 940,330,000 927,196,000 800,370,000 808,612,000 828,907,000 795,705,000 729,193,000 750,987,000 756,339,000 739,523,000 686,445,000 679,494,000 682,691,000 643,845,000 616,801,000 605,675,000 600,517,000 535,054,000 519,688,000 542,262,000 531,864,000 514,924,000 474,886,000 474,000,000 460,149,000 458,508,000 452,157,000 465,122,000 465,278,000 467,851,000 466,426,000 496,541,000 495,274,000 501,752,000 515,752,000 577,774,000 592,989,000 575,552,000 560,583,000 539,650,000 518,684,000 509,512,000 487,400,000 493,586,000 479,237,000 554,852,000 554,741,000 546,729,000 521,291,000 517,499,000 508,738,000 513,853,000 503,840,000 486,393,000       
        liabilities and stockholders’ equity
                                                                                                     
        current liabilities:
                                                                                                     
        accounts payable
      147,132,000 107,424,000 112,534,000 128,993,000 154,995,000 114,560,000 161,241,000 155,590,000 153,487,000 141,877,000 112,594,000 98,249,000 108,362,000 99,792,000 114,697,000 145,298,000 130,163,000 114,010,000 140,774,000 100,499,000 121,613,000 89,381,000 97,060,000 81,516,000 91,395,000 83,621,000 84,857,000 77,521,000 71,983,000 78,994,000 62,025,000 71,045,000 65,866,000 57,717,000 63,742,000 55,746,000 70,971,000 45,149,000 48,129,000 49,679,000 59,723,000 54,754,000 59,504,000 49,939,000 57,346,000 42,388,000 57,460,000 62,885,000 66,098,000 50,799,000 48,974,000 59,597,000 53,476,000 43,706,000 52,442,000 49,033,000 54,307,000 39,783,000 38,231,000 41,146,000 38,162,000 37,745,000 44,272,000 48,106,000 49,798,000 46,997,000 51,164,000 42,798,000 48,539,000 46,572,000    34,905,000    30,291,000    39,584,000    25,832,000    19,701,000    20,514,000  
        wages, vacation and employees’ benefits
      70,402,000 50,723,000 72,318,000 61,909,000 57,602,000 49,953,000 70,613,000 62,614,000 55,318,000 75,514,000 77,721,000 63,153,000 54,706,000 66,684,000 79,193,000 78,945,000 62,125,000 73,109,000 77,538,000 65,187,000 49,007,000 55,392,000 54,947,000 55,355,000 46,678,000 49,668,000 53,068,000 47,095,000 38,834,000 48,116,000 53,175,000 46,739,000 38,939,000 39,748,000 44,140,000 40,872,000 33,098,000 31,700,000 38,277,000 33,619,000 30,423,000 27,834,000 32,463,000 38,844,000 33,187,000  39,764,000 34,502,000 29,816,000  35,338,000 31,925,000 26,848,000  33,838,000 31,345,000 25,512,000  24,952,000 22,937,000 20,985,000  24,310,000 22,379,000 20,813,000  25,718,000 39,754,000 38,511,000  38,865,000 36,790,000 34,652,000  37,163,000                     
        claims and insurance accruals
      46,497,000 46,020,000 45,437,000 47,111,000 45,529,000 43,126,000 40,799,000 39,682,000 36,612,000 41,641,000 46,047,000 42,018,000 43,276,000 45,481,000 74,799,000 49,222,000 44,853,000 54,717,000 42,622,000 48,533,000 46,962,000 49,613,000 43,517,000 39,627,000 37,696,000 36,888,000 35,770,000 47,255,000 40,138,000 40,980,000 39,846,000 41,326,000 39,049,000 35,850,000 37,704,000 36,131,000  33,047,000    26,903,000    29,314,000    27,637,000    29,350,000    27,602,000    20,560,000    26,367,000    29,688,000    20,085,000    15,856,000    17,826,000    16,045,000    10,757,000    12,277,000  
        other current liabilities
      34,452,000 32,342,000 37,415,000 33,859,000 37,878,000 38,036,000 41,580,000 36,303,000 58,331,000 27,094,000 25,090,000 26,800,000 24,479,000 22,684,000 31,116,000 25,594,000 61,618,000 38,551,000 37,345,000 29,264,000 48,285,000 40,571,000 39,731,000 32,953,000 35,024,000 32,644,000 32,837,000 29,439,000 25,207,000 23,138,000 37,083,000 29,628,000 20,032,000 19,807,000 20,841,000 18,283,000 51,103,000 18,286,000 50,300,000 45,014,000 46,700,000 19,457,000 50,495,000 49,017,000 46,948,000 20,862,000 47,937,000 48,922,000 52,812,000 20,030,000 44,286,000 41,480,000 44,721,000 15,259,000 41,201,000 39,359,000 41,834,000 13,635,000 37,816,000 31,945,000 32,804,000  32,246,000 32,420,000 35,411,000  43,522,000 38,848,000 43,078,000  51,011,000 48,322,000 39,023,000  45,690,000 40,388,000 34,409,000  36,134,000 32,801,000 38,357,000  35,201,000 29,071,000 32,884,000  36,176,000 35,518,000 30,776,000  33,698,000 31,697,000 28,267,000  31,067,000 
        current portion of long-term debt
      759,000 980,000 1,199,000 1,967,000 3,769,000 5,313,000 6,761,000 7,577,000 7,498,000 10,173,000 10,971,000 11,681,000 14,452,000 14,519,000 15,914,000 17,935,000 18,373,000 19,396,000 20,245,000 21,648,000 21,055,000 20,588,000 20,735,000 19,727,000 19,565,000 19,405,000 19,245,000 18,959,000 17,914,000 18,082,000 17,622,000 16,839,000 14,791,000 14,083,000 17,072,000 16,669,000 19,183,000 16,762,000 16,695,000 16,627,000 13,659,000 12,432,000 12,031,000 11,215,000 9,560,000 9,138,000 8,120,000 7,143,000 7,143,000 7,143,000 14,643,000 14,643,000 22,143,000 22,143,000 22,143,000 22,143,000 22,143,000 22,143,000 19,643,000 19,643,000 17,143,000 17,143,000 8,571,000 8,571,000   17,500,000 17,500,000 8,775,000 28,899,000 10,188,000 15,188,000 12,793,000 12,793,000 12,793,000 17,793,000 11,356,000 11,356,000 8,856,000 8,856,000 5,000,000 5,000,000 2,500,000 2,500,000  1,263,000 1,263,000 1,263,000        
        current portion of operating lease liability
      29,253,000 27,895,000 27,001,000 28,970,000 27,925,000 27,372,000 25,679,000 26,062,000 26,526,000 25,757,000 26,805,000 25,393,000 25,256,000 24,925,000 22,750,000 22,155,000 21,989,000 21,565,000 20,097,000 19,764,000 20,336,000 20,209,000 19,701,000 18,916,000 18,689,000 19,020,000 18,304,000 16,921,000 17,390,000                                                                   
        total current liabilities
      328,495,000 265,384,000 295,904,000 302,809,000 327,698,000 278,360,000 346,673,000 327,828,000 337,772,000 322,056,000 299,228,000 267,294,000 270,531,000 274,085,000 338,469,000 339,149,000 339,121,000 321,348,000 338,621,000 284,895,000 307,258,000 275,754,000 275,691,000 248,094,000 249,047,000 241,246,000 244,081,000 237,190,000 211,466,000 209,310,000 209,751,000 205,577,000 178,677,000 167,205,000 183,499,000 167,701,000 174,355,000 144,944,000 153,401,000 144,939,000 150,505,000 141,380,000 154,493,000 149,015,000 147,041,000 130,479,000 153,281,000 153,452,000 155,869,000 140,857,000 143,241,000 147,645,000 147,188,000 141,300,000 149,624,000 141,880,000 143,796,000 124,348,000 120,642,000 115,671,000 109,094,000 105,766,000 109,399,000 111,476,000 106,022,000 102,771,000 137,904,000 138,900,000 138,903,000 146,881,000 159,676,000 162,932,000 126,575,000 126,525,000 137,411,000 140,054,000 124,710,000 126,641,000 127,028,000 124,877,000 127,629,000 136,587,000 132,851,000 111,402,000 104,406,000 99,198,000 115,961,000 110,166,000 97,837,000       
        other liabilities:
                                                                                                     
        long-term debt, less current portion
      112,000,000 163,000,000 218,000,000 307,124,000 291,758,000 194,981,000 184,202,000 169,098,000 76,553,000 6,315,000 7,963,000 9,677,000 12,052,000 16,489,000 18,936,000 21,360,000 26,506,000 31,008,000 34,926,000 39,378,000 44,962,000 50,388,000 100,186,000 141,112,000 216,202,000 117,025,000 146,020,000 160,920,000 130,964,000 104,777,000 103,715,000 138,161,000 127,782,000 118,833,000 110,161,000 131,699,000 137,738,000 57,042,000 77,543,000 122,747,000 102,780,000 56,540,000 69,163,000 97,419,000 98,076,000 73,897,000 65,188,000 88,597,000 72,576,000 69,740,000 76,863,000 84,378,000 36,613,000 38,562,000 59,034,000 68,588,000 64,309,000 50,714,000 61,786,000 61,786,000 72,857,000 72,857,000 81,429,000 81,429,000  90,000,000 98,750,000 98,750,000 107,500,000 107,500,000                         127,100,000 
        operating lease liability, less current portion
      119,847,000 113,119,000 102,175,000 106,282,000 94,532,000 96,798,000 92,325,000 97,480,000 98,190,000 96,462,000 102,848,000 88,506,000 93,649,000 98,581,000 87,388,000 85,522,000 84,062,000 88,409,000 86,979,000 88,208,000 93,366,000 95,321,000 99,474,000 104,958,000 105,282,000 86,239,000 86,552,000 55,960,000 58,035,000                                                                   
        deferred income taxes
      293,701,000 284,370,000 287,123,000 236,536,000 224,307,000 219,062,000 161,867,000 159,925,000 157,626,000 155,841,000 163,267,000 158,543,000 151,509,000 145,771,000 124,960,000 123,229,000 122,106,000 124,137,000 124,903,000 123,000,000 121,144,000 119,818,000 122,162,000 119,125,000 118,624,000 111,555,000 108,711,000 100,244,000 92,208,000 86,893,000 65,895,000 63,419,000 61,031,000 59,423,000 90,064,000 87,075,000 82,738,000 80,199,000 74,091,000 71,673,000 69,078,000 67,417,000 77,775,000 74,224,000 76,853,000 19,460,000 69,422,000 68,472,000 68,612,000 20,421,000 59,514,000 55,733,000 55,611,000 18,883,000 52,822,000 53,158,000 51,289,000 14,052,000 46,181,000 42,077,000 39,077,000 10,562,000 41,830,000 41,867,000 41,867,000 11,150,000 50,967,000 50,584,000 50,584,000 21,717,000 58,073,000 54,661,000 54,661,000 17,062,000 48,891,000 47,917,000 46,242,000 11,781,000 42,366,000 40,949,000 58,062,000 12,507,000 51,951,000 57,478,000 57,478,000 10,723,000 51,352,000 53,455,000 53,485,000 15,714,000 49,185,000 54,087,000 54,087,000 16,681,000 54,590,000 
        claims, insurance and other
      83,357,000 79,109,000 71,731,000 68,453,000 66,499,000 66,385,000 65,572,000 66,705,000 66,635,000 61,397,000 62,550,000 66,869,000 64,118,000 60,443,000 64,089,000 74,833,000 69,064,000 60,015,000 59,104,000 48,756,000 46,237,000 46,205,000 49,701,000 49,821,000 44,717,000 44,402,000 44,537,000 40,304,000 36,534,000 36,899,000 39,440,000 38,827,000 40,663,000 39,639,000 37,242,000 38,855,000 36,898,000 35,107,000 34,687,000 35,352,000 34,574,000 35,967,000 35,728,000 34,689,000 38,300,000 36,757,000 42,500,000 41,932,000 32,054,000 31,496,000 31,215,000 31,515,000 31,639,000 29,696,000 32,503,000 30,042,000 29,954,000 29,234,000 28,852,000 29,239,000 29,529,000 28,099,000 26,943,000 27,897,000 30,160,000 29,107,000 28,367,000 30,465,000 27,152,000 27,215,000 22,630,000 24,717,000 21,897,000 17,393,000 16,405,000 17,147,000 18,061,000 13,717,000 13,670,000 12,199,000 18,386,000 21,787,000 21,110,000 21,941,000 18,012,000 17,789,000 18,328,000 19,209,000 19,199,000 18,475,000 15,749,000 15,343,000 15,992,000 15,008,000 14,751,000 
        total other liabilities
      608,905,000 639,598,000 679,029,000 718,395,000 677,096,000 577,226,000 503,966,000 493,208,000 399,004,000 320,015,000 336,628,000 323,595,000 321,328,000 321,284,000 295,373,000 304,944,000 301,738,000 303,569,000 305,912,000 299,342,000 305,709,000 311,732,000 371,523,000 415,016,000 484,825,000 359,221,000 385,820,000 357,428,000 317,741,000 228,569,000 209,050,000 240,407,000 229,476,000 217,895,000 237,467,000 257,629,000 257,374,000 172,348,000 186,321,000 229,772,000 206,432,000 159,924,000 182,666,000 206,332,000 213,229,000 189,060,000 177,110,000 199,001,000 173,242,000 171,152,000 167,592,000 171,626,000 123,863,000 123,869,000 144,359,000 151,788,000 145,552,000 131,237,000 136,819,000 133,102,000 141,463,000 140,033,000 150,202,000 151,193,000 162,027,000 160,974,000 178,084,000 179,799,000 185,236,000 185,299,000 208,320,000 224,060,000 249,090,000 233,406,000 204,136,000 169,273,000 183,962,000 157,604,000 159,646,000 156,741,000 194,379,000 189,762,000 196,342,000 195,797,000 195,617,000 196,998,000 191,202,000 194,161,000 195,419,000       
        commitments and contingencies
                                                                                                     
        stockholders’ equity:
                                                                                                     
        preferred stock, 0.001 par value...
                                                                                                     
        common stock, 0.001 par value...
      27,000 27,000 27,000 27,000 27,000 27,000 27,000 27,000 27,000 27,000 27,000 27,000 27,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 26,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 25,000 24,000 24,000 24,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 16,000 14,000 14,000 14,000 14,000 14,000 13,000 13,000 13,000 15,000 15,000 15,000 15,000 15,000 15,000 15,000 14,000 15,000 15,000 15,000 15,000 15,000 15,000 15,000     15,000  
        additional paid-in-capital
      306,287,000 307,605,000 303,268,000 300,593,000 295,459,000 295,106,000 291,319,000 287,611,000 282,090,000 285,092,000 282,175,000 277,208,000 273,274,000 277,366,000 275,358,000 271,395,000 267,745,000 274,633,000 272,545,000 270,608,000 267,430,000 267,666,000 267,075,000 265,264,000 262,008,000 260,871,000 259,388,000 257,583,000 254,575,000 254,738,000 253,366,000 252,536,000 250,233,000 246,454,000 243,382,000 241,057,000 238,995,000 237,846,000 234,045,000 233,200,000 231,114,000 230,593,000 228,015,000 226,891,000 223,846,000 223,713,000 219,512,000 216,926,000 215,002,000 213,648,000 211,762,000 211,054,000 207,258,000 206,977,000 206,159,000 205,368,000 204,555,000 203,793,000 203,547,000 203,153,000 203,087,000 202,751,000  202,204,000 201,397,000 201,041,000 175,770,000 175,071,000 174,445,000 174,079,000 172,300,000 171,379,000 170,563,000 170,260,000 201,509,000 200,716,000 199,606,000 199,257,000 199,084,000 197,498,000 196,772,000 194,398,000 207,066,000 206,971,000 206,760,000 205,800,000 204,575,000 203,719,000 202,703,000 201,743,000 201,589,000 201,199,000 201,033,000 200,611,000  
        deferred compensation trust, 69,292 and 70,053 shares of common stock at cost at march 31, 2026 and december 31, 2025, respectively
      -9,101,000                                                                                               
        retained earnings
      2,329,024,000 2,279,155,000 2,231,636,000 2,145,320,000 2,073,929,000 2,024,119,000 1,948,016,000 1,855,268,000 1,752,749,000 1,662,054,000 1,572,826,000 1,474,613,000 1,383,294,000 1,307,197,000 1,236,335,000 1,138,444,000 1,029,199,000 949,775,000 876,014,000 796,305,000 733,831,000 696,540,000 656,304,000 614,765,000 586,311,000 558,200,000 536,781,000 503,813,000 466,740,000 444,481,000 419,101,000 390,906,000 360,625,000 339,553,000 291,794,000 277,387,000 259,784,000 248,397,000 238,049,000 224,223,000 210,948,000 200,373,000 188,986,000 177,209,000 157,962,000 145,357,000 131,788,000 115,510,000 101,942,000 93,366,000 85,302,000 72,394,000 58,894,000 49,739,000 44,333,000 35,077,000 23,226,000 17,691,000 15,218,000 10,389,000 7,031,000 6,318,000 5,613,000 3,118,000 1,138,000 4,361,000 7,492,000 4,200,000 5,947,000 12,236,000 40,235,000 37,464,000 32,130,000 32,963,000 30,997,000 25,047,000 17,644,000 14,621,000 9,420,000 1,736,000 37,673,000 35,302,000 24,587,000 17,605,000 11,815,000 7,843,000 3,216,000 -3,336,000 -8,809,000 -11,416,000 -15,970,000 -21,100,000 -25,023,000 -26,349,000 -29,380,000 
        total stockholders’ equity
      2,626,237,000 2,577,699,000 2,526,027,000 2,436,522,000 2,360,427,000 2,311,271,000 2,231,485,000 2,136,086,000 2,028,938,000 1,941,494,000 1,849,463,000 1,746,222,000 1,650,940,000 1,579,341,000 1,506,482,000 1,403,762,000 1,291,490,000 1,220,333,000 1,144,726,000 1,063,158,000 997,618,000 961,288,000 918,466,000 875,090,000 843,387,000 815,226,000 792,371,000 757,502,000 717,650,000 695,864,000 669,291,000 639,974,000 607,394,000 582,547,000 531,753,000 515,000,000 495,467,000 483,078,000 468,890,000 454,196,000 438,768,000 427,889,000 413,828,000 400,992,000 379,253,000 366,906,000 349,103,000 330,238,000 314,734,000 304,792,000 294,842,000 281,246,000 264,003,000 254,519,000 248,279,000 238,196,000 225,576,000  216,539,000 211,376,000 207,951,000                                   
        total liabilities and stockholders’ equity
      3,563,637,000 3,482,681,000 3,500,960,000 3,457,726,000 3,365,221,000 3,166,857,000 3,082,124,000 2,957,122,000 2,765,714,000 2,583,565,000 2,485,319,000 2,337,111,000 2,242,799,000 2,174,710,000 2,140,324,000 2,047,855,000 1,932,349,000 1,845,250,000 1,789,259,000 1,647,395,000 1,610,585,000 1,548,774,000 1,565,680,000 1,538,200,000 1,577,259,000 1,415,693,000 1,422,272,000 1,352,120,000 1,246,857,000 1,133,743,000 1,088,092,000 1,085,958,000 1,015,547,000 967,647,000 952,719,000 940,330,000 927,196,000 800,370,000 808,612,000 828,907,000 795,705,000 729,193,000 750,987,000 756,339,000 739,523,000 686,445,000 679,494,000 682,691,000 643,845,000 616,801,000 605,675,000 600,517,000 535,054,000 519,688,000 542,262,000 531,864,000 514,924,000  474,000,000 460,149,000 458,508,000                                   
        accounts receivable, less allowances
       332,206,000    322,991,000    311,742,000    290,306,000    276,755,000    216,899,000    196,119,000    181,612,000    170,610,000    135,083,000    124,222,000    128,367,000    117,937,000    106,814,000                                          
        less-accumulated depreciation and amortization
       1,415,087,000    1,233,134,000    1,118,492,000    996,204,000    864,074,000    765,217,000    686,623,000                                                                      
        deferred compensation trust, 70,053 and 70,100 shares of common stock at cost at december 31, 2025 and 2024, respectively
       -9,088,000                                                                                              
        deferred compensation trust, 69,573 and 70,100 shares of common stock at cost at september 30, 2025 and december 31, 2024, respectively
        -8,904,000                                                                                             
        deferred compensation trust, 73,584 and 70,100 shares of common stock at cost at june 30, 2025 and december 31, 2024, respectively
         -9,418,000                                                                                            
        deferred compensation trust, 72,410 and 70,100 shares of common stock at cost at march 31, 2025 and december 31, 2024, respectively
          -8,988,000                                                                                           
        deferred compensation trust, 70,100 and 69,672 shares of common stock at cost at december 31, 2024 and 2023, respectively
           -7,981,000                                                                                          
        deferred compensation trust, 70,560 and 69,672 shares of common stock at cost at september 30, 2024 and december 31, 2023, respectively
            -7,877,000                                                                                         
        deferred compensation trust, 71,302 and 69,672 shares of common stock at cost at june 30, 2024 and december 31, 2023, respectively
             -6,820,000                                                                                        
        deferred compensation trust, 69,412 and 69,672 shares of common stock at cost at march 31, 2024 and december 31, 2023, respectively
              -5,928,000                                                                                       
        deferred compensation trust, 69,672 and 69,982 shares of common stock at cost at december 31, 2023 and 2022, respectively
               -5,679,000                                                                                      
        deferred compensation trust, 69,682 and 69,982 shares of common stock at cost at september 30, 2023 and december 31, 2022, respectively
                -5,565,000                                                                                     
        less: accumulated depreciation
                 1,075,639,000 1,034,649,000  964,533,000 924,628,000 890,927,000  846,195,000 826,983,000 796,511,000  762,264,000 743,345,000 712,882,000                                                                      194,515,000 
        deferred compensation trust, 70,442 and 69,982 shares of common stock at cost at june 30, 2023 and december 31, 2022, respectively
                 -5,626,000                                                                                    
        deferred compensation trust, 70,812 and 69,982 shares of common stock at cost at march 31, 2023 and december 31, 2022, respectively
                  -5,655,000                                                                                   
        deferred compensation trust, 69,982 and 94,627 shares of common stock at cost at december 31, 2022 and 2021, respectively
                   -5,248,000                                                                                  
        prepaid expenses and other
                    54,123,000 32,041,000 46,998,000  33,045,000 38,310,000 52,160,000  27,971,000 34,082,000 41,563,000  31,694,000 33,840,000 38,923,000  26,155,000 30,854,000 34,066,000 17,540,000 28,399,000 30,219,000 34,969,000 17,369,000 22,152,000 29,450,000 37,590,000 14,197,000 42,156,000 44,132,000 55,492,000 13,687,000 39,619,000 43,877,000 43,609,000 13,156,000 37,551,000 33,601,000 32,585,000 11,540,000 31,115,000 27,169,000 29,215,000 11,572,000 29,311,000 30,019,000 30,682,000      41,546,000 43,354,000 43,146,000  36,774,000 52,504,000 42,577,000  33,213,000 30,287,000 30,890,000  27,409,000 24,650,000 36,271,000  34,214,000 30,195,000 32,714,000  30,789,000 34,631,000 35,734,000  31,149,000 34,144,000 34,685,000  35,558,000 
        deferred compensation trust, 70,578 and 94,627 shares of common stock at cost at september 30, 2022 and december 31, 2021, respectively
                    -5,237,000                                                                                 
        deferred compensation trust, 83,197 and 94,627 shares of common stock at cost at june 30, 2022 and december 31, 2021, respectively
                     -6,103,000                                                                                
        deferred compensation trust, 80,174 and 94,627 shares of common stock at cost at march 31, 2022 and december 31, 2021, respectively
                      -5,480,000                                                                               
        goodwill
                       12,105,000    12,105,000    12,105,000    12,105,000    12,105,000    12,105,000    12,025,000    5,231,000    5,231,000    5,231,000                 35,511,000 35,470,000 35,470,000 35,470,000 36,192,000 36,119,000 38,688,000 36,406,000 30,530,000 30,530,000 30,530,000 30,530,000 30,530,000 30,530,000 30,841,000 30,841,000          
        identifiable intangibles
                       7,052,000    8,216,000    9,379,000    10,559,000    11,922,000    13,293,000    14,961,000    2,943,000    3,558,000    4,173,000  1,305,000 1,378,000 1,450,000 1,548,000 1,645,000 1,743,000 1,840,000 1,938,000 2,035,000 2,133,000  2,462,000 2,658,000 2,855,000                           
        deferred compensation trust, 94,627 and 91,888 shares of common stock at cost at december 31, 2021 and 2020, respectively
                       -4,101,000                                                                              
        deferred compensation trust, 95,438 and 91,888 shares of common stock at cost at september 30, 2021 and december 31, 2020, respectively
                        -3,859,000                                                                             
        deferred compensation trust, 95,428 and 91,888 shares of common stock at cost at june 30, 2021 and december 31, 2020, respectively
                         -3,781,000                                                                            
        deferred compensation trust, 94,888 and 91,888 shares of common stock at cost at march 31, 2021 and december 31, 2020, respectively
                          -3,669,000                                                                           
        deferred compensation trust, 91,888 and 143,987 shares of common stock at cost at december 31, 2020 and 2019, respectively
                           -2,944,000                                                                          
        deferred compensation trust, 154,157 and 143,987 shares of common stock at cost at september 30, 2020 and december 31, 2019, respectively
                            -4,939,000                                                                         
        deferred compensation trust, 154,977 and 143,987 shares of common stock at cost at june 30, 2020 and december 31, 2019, respectively
                             -4,965,000                                                                        
        deferred compensation trust, 156,897 and 143,987 shares of common stock at cost at march 31, 2020 and december 31, 2019, respectively
                              -4,958,000                                                                       
        deferred compensation trust, 143,987 and 143,614 shares of common stock at cost at december 31, 2019 and 2018, respectively
                               -3,871,000                                                                      
        less-accumulated depreciation
                                693,895,000 674,220,000 648,408,000 628,283,000 609,324,000 594,678,000 573,699,000 554,214,000 538,065,000 520,682,000 504,324,000 497,827,000 492,577,000 481,088,000 467,212,000 456,335,000 443,330,000 429,698,000 417,271,000 407,505,000 397,458,000 389,041,000 377,108,000 365,301,000 365,798,000 369,346,000 361,364,000 356,823,000 353,328,000 346,762,000 342,987,000 344,890,000 340,583,000 335,177,000 327,542,000 319,634,000 316,230,000 308,422,000 301,213,000 292,443,000 284,593,000 277,431,000 268,350,000 259,410,000 250,918,000 242,229,000 236,732,000 227,585,000 221,637,000 217,027,000 209,569,000 203,220,000 197,097,000 191,689,000 283,447,000 275,366,000 269,849,000 261,846,000 255,531,000 248,914,000 246,606,000 241,680,000 236,736,000 227,322,000 223,143,000 214,203,000 206,274,000 200,645,000  
        deferred compensation trust, 144,463 and 143,614 shares of common stock at cost at september 30, 2019 and december 31, 2018, respectively
                                -3,824,000                                                                     
        deferred compensation trust, 148,066 and 143,614 shares of common stock at cost at june 30, 2019 and december 31, 2018, respectively
                                 -3,920,000                                                                    
        deferred compensation trust, 144,536 and 143,614 shares of common stock at cost at march 31, 2019 and december 31, 2018, respectively
                                  -3,691,000                                                                   
        deferred compensation trust, 143,614 and 170,310 shares of common stock at cost at december 31, 2018 and 2017, respectively
                                   -3,381,000                                                                  
        deferred compensation trust, 140,882 and 170,310 shares of common stock at cost at september 30, 2018 and december 31, 2017, respectively
                                    -3,202,000                                                                 
        deferred compensation trust, 155,714 and 170,310 shares of common stock at cost at june 30, 2018 and december 31, 2017, respectively
                                     -3,494,000                                                                
        deferred compensation trust, 160,379 and 170,310 shares of common stock at cost at march 31, 2018 and december 31, 2017, respectively
                                      -3,490,000                                                               
        deferred compensation trust, 170,310 and 166,807 shares of common stock at cost at december 31, 2017 and 2016, respectively
                                       -3,486,000                                                              
        deferred compensation trust, 170,900 and 166,807 shares of common stock at cost at september 30, 2017 and december 31, 2016, respectively
                                        -3,448,000                                                             
        deferred compensation trust, 171,927 and 165,971 shares of common stock at cost at june 30, 2017 and december 31, 2016, respectively
                                         -3,469,000                                                            
        deferred compensation trust, 169,907 and 165,971 shares of common stock at cost at march 31, 2017 and december 31, 2016, respectively
                                          -3,337,000                                                           
        deferred compensation trust, 166,807 and 165,971 shares of common stock at cost at december 31, 2016 and december 31, 2015, respectively
                                           -3,190,000                                                          
        deferred compensation trust, 168,827 and 165,971 shares of common stock at cost at september 30, 2016 and december 31, 2015, respectively
                                            -3,229,000                                                         
        deferred compensation trust, 170,027 and 165,971 shares of common stock at cost at june 30, 2016 and december 31, 2015, respectively
                                             -3,252,000                                                        
        deferred compensation trust, 174,171 and 165,971 shares of common stock at cost at march 31, 2016 and december 31, 2015, respectively
                                              -3,319,000                                                       
        deferred compensation trust, 165,971 and 193,607 shares of common stock at cost at december 31, 2015 and december 31, 2014, respectively
                                               -3,102,000                                                      
        deferred compensation trust, 172,266 and 193,607 shares of common stock at cost at september 30, 2015 and december 31, 2014, respectively
                                                -3,198,000                                                     
        deferred compensation trust, 170,413 and 193,607 shares of common stock at cost at june 30, 2015 and december 31, 2014, respectively
                                                 -3,133,000                                                    
        deferred compensation trust, 202,407 and 193,607 shares of common stock at cost at march 31, 2015 and december 31, 2014, respectively
                                                  -2,580,000                                                   
        wages, vacations and employees’ benefits
                                                   28,777,000    35,248,000    30,842,000    21,185,000    19,101,000    18,793,000    28,148,000    32,862,000  42,133,000 39,394,000 45,752,000 44,211,000 39,105,000 39,120,000 43,490,000 42,401,000 37,369,000 32,595,000 35,761,000 39,079,000 37,325,000 31,250,000 30,779,000 34,990,000 31,224,000 27,985,000 27,870,000  
        deferred compensation trust, 193,607 and 201,936 shares of common stock at cost at december 31, 2014 and 2013, respectively
                                                   -2,189,000                                                  
        deferred compensation trust, 196,599 and 201,936 shares of common stock at cost at september 30, 2014 and december 31, 2013, respectively
                                                    -2,222,000                                                 
        deferred compensation trust, 196,599 and 201,936 shares of common stock at cost at june 30, 2014 and december 31, 2013, respectively
                                                     -2,223,000                                                
        deferred compensation trust, 197,699 and 201,936 shares of common stock at cost at march 31, 2014 and december 31, 2013, respectively
                                                      -2,235,000                                               
        deferred compensation trust, 201,936 and 207,755 shares of common stock at cost at december 31, 2013 and 2012, respectively
                                                       -2,246,000                                              
        deferred compensation trust, 201,936 and 207,755 shares of common stock at cost at september 30, 2013 and december 31, 2012, respectively
                                                        -2,246,000                                             
        deferred compensation trust, 201,936 and 207,755 shares of common stock at cost at june 30, 2013 and december 31, 2012, respectively
                                                         -2,226,000                                            
        deferred compensation trust, 133,024 and 138,503 shares of common stock at cost at march 31, 2013 and december 31, 2012, respectively
                                                          -2,165,000                                           
        deferred compensation trust, 138,503 and 139,324 shares of common stock at cost at december 31, 2012 and 2011, respectively
                                                           -2,213,000                                          
        deferred compensation trust, 140,201 and 139,324 shares of common stock at cost at september 30, 2012 and december 31, 2011, respectively
                                                            -2,229,000                                         
        deferred compensation trust, 142,779 and 139,324 shares of common stock at cost at june 30, 2012 and december 31, 2011, respectively
                                                             -2,265,000                                        
        deferred compensation trust,140,644 and 139,324 shares of common stock at cost at march 31, 2012 and december 31, 2011, respectively
                                                              -2,221,000                                       
        accounts receivables
                                                               107,436,000    94,569,000    87,507,000    93,691,000    107,116,000    95,779,000    126,824,000    110,044,000          
        liabilities and shareholders’ equity
                                                                                                     
        shareholders’ equity:
                                                                                                     
        deferred compensation trust, 139,324 and 169,344 shares of common stock at cost at december 31, 2011 and 2010, respectively
                                                               -2,199,000                                      
        total shareholders’ equity
                                                               219,301,000    206,358,000 205,521,000 202,609,000 199,802,000 202,681,000 180,553,000 176,575,000 177,613,000 183,572,000 209,778,000 205,997,000 199,887,000 200,652,000 198,103,000 209,357,000 200,840,000 203,155,000 206,912,000 197,619,000 232,844,000 228,392,000 217,536,000 214,092,000 217,476,000 212,542,000 206,690,000 199,513,000 193,137,000       
        total liabilities and shareholders’ equity
                                                               474,886,000    452,157,000 465,122,000 465,278,000 467,851,000 466,426,000 496,541,000 495,274,000 501,752,000 515,752,000 577,774,000 592,989,000 575,552,000 560,583,000 539,650,000 518,684,000 509,512,000 487,400,000 493,586,000 479,237,000 554,852,000 554,741,000 546,729,000 521,291,000 517,499,000 508,738,000 513,853,000 503,840,000 486,393,000       
        deferred compensation trust, 141,309 and 169,344 shares of common stock at cost at september 30, 2011 and december 31, 2010, respectively
                                                                -2,242,000                                     
        deferred compensation trust, 135,929 and 169,344 shares of common stock at cost at june 30, 2011 and december 31, 2010, respectively
                                                                 -2,182,000                                    
        deferred compensation trust, 135,899 and 169,344 shares of common stock at cost at march 31, 2011 and december 31, 2010, respectively
                                                                  -2,183,000                                   
        prepaid expenses, including prepaid interest of 6,998 in 2009
                                                                   8,984,000    13,540,000                              
        accrued liabilities
                                                                   11,217,000    10,614,000    13,574,000    18,053,000    14,171,000    15,330,000    12,936,000    16,914,000    18,405,000  
        deferred compensation trust, 169,344 and 168,360 shares of common stock at cost at december 31, 2010 and 2009, respectively
                                                                   -2,727,000                                  
        prepaid expenses, including prepaid interest and fees of 1,980 and 6,998 in 2010 and 2009, and other
                                                                    28,393,000                                 
        additional paid-in capital
                                                                    202,634,000                                200,133,000 
        deferred compensation trust, 170,254 and 168,360 shares of common stock at cost at september 30, 2010 and december 31, 2009, respectively
                                                                    -2,742,000                                 
        prepaid expenses, including prepaid interest and fees of 4,096 and 6,998 in 2010 and 2009, and other
                                                                     37,679,000                                
        deferred compensation trust, 169,254 and 168,360 shares of common stock at cost at june 30, 2010 and december 31, 2009, respectively
                                                                     -2,729,000                                
        prepaid expenses, including prepaid interest and fees of 6,374 and 6,998 in 2010 and 2009, and other
                                                                      40,003,000                               
        long-term debt
                                                                      90,000,000      127,617,000 144,682,000 172,532,000 160,052,000 138,840,000 104,209,000 119,659,000 98,628,000 103,610,000 103,593,000 117,931,000 109,913,000 123,281,000 116,378,000 120,127,000 121,547,000 121,522,000 121,497,000 122,735,000 116,510,000 116,485,000 116,460,000 116,435,000 116,410,000  
        deferred compensation trust, 170,370 and 168,360 shares of common stock at cost at march 31, 2010 and
                                                                                                     
        december 31, 2009, respectively
                                                                      -2,749,000                               
        other identifiable intangibles
                                                                       2,266,000    3,051,000    3,860,000    1,096,000    1,664,000    2,398,000          
        deferred compensation trust, 168,360 and 163,627 shares of common stock at cost at december 31, 2009 and 2008, respectively
                                                                       -2,737,000                              
        deferred compensation trust, 167,450 and 163,627 shares of common stock at cost at september 30, 2009 and december 31, 2008, respectively
                                                                        -2,723,000                             
        deferred compensation trust, 166,600 and 163,627 shares of common stock at cost at june 30, 2009 and december 31, 2008, respectively
                                                                         -2,710,000                            
        deferred compensation trust, 171,222 and 163,627 shares of common stock at cost at march 31, 2009 and december 31, 2008, respectively
                                                                          -2,793,000                           
        deferred compensation trust, 163,627 and 144,507 shares of common stock at cost at december 31, 2008 and 2007, respectively
                                                                           -2,757,000                          
        other intangibles
                                                                            3,248,000 3,444,000 3,640,000  4,185,000 4,348,000 1,172,000  1,214,000 1,297,000 1,480,000  1,847,000 2,031,000 2,215,000           
        accounts payable and checks outstanding
                                                                            59,612,000 62,632,000 40,107,000  41,765,000 39,740,000 39,551,000  37,602,000 43,166,000 45,152,000  52,749,000 42,462,000 38,927,000  39,443,000 36,060,000 35,811,000  28,590,000 29,673,000 28,273,000  23,584,000 
        deferred compensation trust, 159,537 and 144,507 shares of common stock at cost at september 30, 2008 and december 31, 2007, respectively
                                                                            -2,771,000                         
        deferred compensation trust, 164,117 and 144,507 shares of common stock at cost at june 30, 2008 and december 31, 2007, respectively
                                                                             -2,859,000                        
        deferred compensation trust, 160,237 and 144,507 shares of common stock at cost at march 31, 2008 and december 31, 2007, respectively
                                                                              -2,819,000                       
        checks outstanding
                                                                               7,827,000    9,098,000    15,357,000    7,361,000    7,844,000    5,495,000  
        current liabilities of discontinued operations
                                                                                   117,000 225,000 949,000                
        treasury stock
                                                                                -32,087,000 -14,269,000 -14,269,000 -8,861,000     -12,721,000 -9,177,000            
        deferred compensation trust, 144,507 and 106,247 shares of common stock at cost in 2007 and 2006, respectively
                                                                               -2,584,000                      
        deferred compensation trust, 125,317 and 106,247 shares of common stock at cost at september 30, 2007 and december 31, 2006, respectively
                                                                                -2,331,000                     
        deferred compensation trust, 116,057 and 106,247 shares of common stock at cost at june 30, 2007 and december 31, 2006, respectively
                                                                                 -2,152,000                    
        deferred compensation trust, 116,407 and 106,247 shares of common stock at cost at march 31, 2007 and december 31, 2006, respectively
                                                                                  -2,156,000                   
        current assets of discontinued operations
                                                                                    4,606,000 12,440,000                
        long-term assets of discontinued operations
                                                                                                     
        long-term liabilities of discontinued operations
                                                                                                     
        deferred compensation trust, 106,247 and 87,597 shares of common stock at cost in 2006 and 2005, respectively
                                                                                   -1,877,000                  
        deferred compensation trust, 96,237 and 87,597 shares of common stock at cost at september 30, 2006 and december 31, 2005, respectively
                                                                                    -1,607,000                 
        deferred compensation trust, 98,457 and 87,597 shares of common stock at cost at june 30, 2006 and december 31, 2005, respectively
                                                                                     -1,630,000                
        deferred compensation trust, 97,937 and 87,597 shares of common stock at cost at march 31, 2006 and december 31, 2005, respectively
                                                                                      -1,616,000               
        deferred compensation trust, 87,597 and 76,947 shares of common stock at cost in 2005 and 2004, respectively
                                                                                       -1,322,000              
        deferred compensation trust, 94,507 and 76,947 shares of common stock at cost at september 30, 2005 and december 31, 2004, respectively
                                                                                        -1,411,000             
        deferred compensation trust, 89,327 and 76,947 shares of common stock at cost at june 30, 2005 and december 31, 2004, respectively
                                                                                         -1,322,000            
        deferred compensation trust, 75,977 and 76,947 shares of common stock at cost at march 31, 2005 and december 31, 2004, respectively
                                                                                          -1,114,000           
        deferred compensation trust, 76,947 and 63,617 shares of common stock at cost in 2004 and 2003, respectively
                                                                                           -1,116,000          
        goodwill and other intangibles
                                                                                            33,423,000 33,602,000 32,845,000 15,420,000    15,683,000  
        deferred compensation trust, 76,947 and 63,617 shares of common stock at cost at september 30, 2004 and december 31, 2003, respectively
                                                                                            -1,116,000         
        deferred compensation trust, 66,557 and 63,617 shares of common stock at cost at june 30, 2004 and december 31, 2003, respectively
                                                                                             -885,000        
        deferred compensation trust, 62,217 and 63,617 shares of common stock at cost at march 31, 2004 and december 31, 2003, respectively
                                                                                              -772,000       
        goodwill and other assets
                                                                                                17,344,000 17,220,000 17,358,000  19,449,000 
        current maturities of long-term debt
                                                                                                     
        notes to former parent
                                                                                                     
        former parent company equity
                                                                                                     
        cash
                                                                                                    2,383,000 
        property and equipment:
                                                                                                     
        cost
                                                                                                    491,200,000 
        wages and employees’ benefits
                                                                                                    31,448,000 
        preferred stock, .001 par value...
                                                                                                     
        common stock, .001 par value...
                                                                                                    15,000 
        parent company equity
                                                                                                     
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-06-30 2025-03-31 2024-12-31 2024-06-30 2024-03-31 2023-12-31 2023-06-30 2023-03-31 2022-12-31 2022-06-30 2022-03-31 2021-12-31 2021-06-30 2021-03-31 2020-12-31 2020-06-30 2020-03-31 2019-12-31 2019-06-30 2019-03-31 2018-12-31 2018-06-30 2018-03-31 2017-12-31 2017-06-30 2017-03-31 2016-12-31 2016-06-30 2016-03-31 2015-12-31 2015-06-30 2015-03-31 2014-12-31 2014-06-30 2014-03-31 2013-12-31 2013-06-30 2013-03-31 2012-12-31 2012-06-30 2012-03-31 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-06-30 2010-03-31 2009-12-31 2009-06-30 2009-03-31 2008-12-31 2008-06-30 2008-03-31 2007-12-31 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2006-03-31 2005-12-31 2005-06-30 2005-03-31 2004-12-31 2004-06-30 2004-03-31 2003-12-31 2003-06-30 2003-03-31 2002-09-30 
                                                                               
          operating activities:
                                                                               
          net income
        49,869,000 47,519,000 121,201,000 49,810,000 76,103,000 193,214,000 90,695,000 89,228,000 167,416,000 76,097,000 70,862,000 188,669,000 79,424,000 73,761,000 99,765,000 37,291,000 40,236,000 56,565,000 28,111,000 21,419,000 59,332,000 22,259,000 25,380,000 51,406,000 21,125,000 47,759,000 28,990,000 11,387,000 10,348,000 23,850,000 10,575,000 11,387,000 31,852,000 12,605,000 13,569,000 22,144,000 8,576,000 8,064,000 22,655,000 9,155,000 5,406,000 17,386,000 5,535,000 2,473,000 4,071,000 713,000 705,000                         
          noncash items included in net income:
                                                                               
          depreciation and amortization
        62,190,000 62,947,000 121,589,000 59,043,000 54,064,000 101,385,000 48,849,000 45,689,000 87,538,000 42,880,000 39,625,000 76,896,000 39,952,000 35,927,000 70,031,000 35,372,000 34,177,000 66,254,000 32,590,000 31,877,000 55,925,000 26,782,000 27,188,000 48,271,000 23,030,000 22,495,000 42,269,000 20,087,000 19,330,000 36,983,000 17,243,000 16,495,000 31,760,000 15,199,000 14,758,000 28,928,000 13,841,000 13,799,000 24,020,000 11,634,000 12,304,000 23,366,000 11,415,000 10,179,000 17,376,000 8,573,000 8,686,000 18,527,000 9,210,000                       
          deferred income taxes
        9,331,000 -2,753,000 17,474,000 5,245,000 57,195,000 4,084,000 1,785,000 -7,426,000 12,772,000 5,738,000 20,810,000 -907,000 -2,030,000 -767,000 3,183,000 1,327,000 -2,344,000 7,570,000 7,069,000                                                     
          other
        7,343,000 -14,495,000 13,216,000 6,499,000 -11,277,000 10,669,000 3,624,000 -23,702,000 7,894,000 2,968,000 -49,305,000 3,862,000 181,000 -14,200,000 5,640,000 2,365,000 -8,168,000 7,239,000 2,129,000 -27,713,000 17,403,000 8,076,000 -11,394,000 9,395,000 3,608,000 -13,464,000 14,380,000 5,411,000 -3,755,000 6,351,000 1,701,000 -2,540,000 -27,000 2,060,000 -3,576,000 4,318,000 2,048,000 -602,000 2,531,000 1,431,000 -2,005,000 1,900,000 -1,249,000 1,054,000 927,000 742,000 -2,652,000 1,797,000 1,035,000                       
          changes in operating assets and liabilities:
                                                                               
          accounts receivable
        -46,950,000 31,277,000 -27,886,000 -29,125,000 49,110,000 -66,063,000 -34,371,000 34,614,000 -10,771,000 -5,276,000                                                              
          accounts payable
        28,327,000 -3,790,000 10,996,000 16,371,000 -12,911,000 11,438,000 3,457,000 -14,408,000 10,893,000 7,008,000                                                              
          change in other assets and liabilities
        29,524,000 -4,506,000 23,225,000 1,230,000 -64,678,000 -17,485,000 -7,571,000 11,637,000 15,663,000                                                               
          net cash from operating activities
        139,634,000 137,308,000 279,815,000 109,073,000 164,739,000 237,242,000 106,468,000 161,677,000 291,405,000 119,270,000 128,952,000 207,905,000 95,961,000 114,906,000 140,140,000 60,971,000 70,184,000 148,233,000 51,267,000 65,578,000 113,574,000 30,400,000 69,326,000 112,118,000 35,502,000 30,109,000 79,317,000 24,128,000 28,117,000 65,814,000 16,306,000 28,676,000 67,045,000 26,160,000 10,153,000 46,875,000 4,119,000 33,755,000 31,982,000 7,018,000 23,250,000 50,326,000 24,049,000 23,558,000 10,711,000 -999,000 3,859,000 5,049,000 -2,311,000 -5,880,000 9,734,000 7,012,000 12,844,000 31,540,000 -360,000 15,630,000 19,738,000 3,810,000 14,483,000 36,767,000 -721,000 35,172,000 38,174,000 21,057,000 11,441,000 29,027,000 1,008,000     
          capital expenditures
        -66,116,000 -99,825,000 -377,540,000 -202,889,000 -168,255,000 -681,919,000 -457,164,000 -99,351,000 -227,022,000 -128,415,000 -88,372,000 -156,351,000 -46,259,000 -130,862,000 -100,202,000 -25,568,000 -25,835,000 -148,865,000 -107,591,000 -42,452,000 -166,434,000 -56,741,000 -68,455,000 -118,573,000 -46,881,000 -31,020,000 -127,330,000 -88,388,000 -10,494,000 -102,140,000 -53,995,000 -17,664,000 -56,466,000 -30,064,000 -17,977,000 -67,077,000 -8,379,000 -25,559,000 -72,092,000 -6,725,000 -4,232,000 -71,442,000 -40,595,000 -18,553,000 -20,893,000 -6,106,000 -2,240,000 -560,000 -122,000 -1,550,000 -4,949,000 -2,266,000 -5,900,000 -20,614,000 -13,530,000 -35,338,000 -29,002,000 -20,863,000 -23,406,000 -42,328,000 -22,194,000 -21,716,000 -27,262,000 -16,803,000 -31,676,000 -18,725,000 -4,847,000     
          free cash flows
        73,518,000 37,483,000 -97,725,000 -93,816,000 -3,516,000 -444,677,000 -350,696,000 62,326,000 64,383,000 -9,145,000 40,580,000 51,554,000 49,702,000 -15,956,000 39,938,000 35,403,000 44,349,000 -632,000 -56,324,000 23,126,000 -52,860,000 -26,341,000 871,000 -6,455,000 -11,379,000 -911,000 -48,013,000 -64,260,000 17,623,000 -36,326,000 -37,689,000 11,012,000 10,579,000 -3,904,000 -7,824,000 -20,202,000 -4,260,000 8,196,000 -40,110,000 293,000 19,018,000 -21,116,000 -16,546,000 5,005,000 -10,182,000 -7,105,000 1,619,000 4,489,000 -2,433,000 -7,430,000 4,785,000 4,746,000 6,944,000 10,926,000 -13,890,000 -19,708,000 -9,264,000 -17,053,000 -8,923,000 -5,561,000 -22,915,000 13,456,000 10,912,000 4,254,000 -20,235,000 10,302,000 -3,839,000     
          investing activities:
                                                                               
          acquisition of property and equipment
        -66,116,000 -99,825,000 -377,540,000 -202,889,000 -168,255,000 -681,919,000 -457,164,000 -99,351,000 -227,022,000 -128,415,000 -88,372,000 -156,351,000 -46,259,000 -130,862,000 -100,202,000 -25,568,000 -25,835,000 -148,865,000 -107,591,000 -42,452,000 -166,434,000 -56,741,000 -68,455,000 -118,573,000 -46,881,000 -31,020,000 -127,330,000 -88,388,000 -10,494,000 -102,140,000 -53,995,000 -17,664,000 -56,466,000 -30,064,000 -17,977,000 -67,077,000 -8,379,000 -25,559,000 -72,092,000 -6,725,000 -4,232,000 -71,442,000 -40,595,000 -18,553,000 -20,893,000 -6,106,000 -2,240,000 -560,000 -122,000 -1,550,000 -4,949,000 -2,266,000 -5,900,000 -20,614,000 -13,530,000 -35,338,000 -29,002,000 -20,863,000 -23,406,000 -42,328,000 -22,194,000 -21,716,000 -27,262,000 -16,803,000 -31,676,000 -18,725,000 -4,847,000 -20,047,000 -17,751,000 -3,567,000 -29,359,000 
          proceeds from disposal of property and equipment
        2,392,000 1,775,000 1,967,000 826,000 615,000 643,000 343,000 586,000 529,000 360,000 856,000 1,060,000 883,000 1,938,000 236,000 180,000 4,528,000 6,143,000 4,915,000 5,946,000 380,000 275,000 310,000 418,000 100,000 2,082,000 923,000 607,000 636,000 595,000 367,000 153,000 517,000 294,000 315,000 421,000 156,000 1,280,000 1,273,000 710,000 696,000 2,138,000 1,358,000 2,408,000 275,000 61,000 159,000 337,000 59,000 209,000 584,000 368,000 406,000 994,000 104,000 727,000 487,000 319,000 528,000 667,000 979,000 10,462,000 2,607,000 1,364,000 3,338,000 2,646,000 1,584,000 2,331,000 2,908,000 1,815,000 4,987,000 
          net cash from investing activities
        -63,724,000 -98,050,000 -383,967,000 -202,063,000 -167,640,000 -676,277,000 -451,822,000 -111,688,000 -226,493,000 -128,055,000 -87,516,000 -155,291,000 -45,376,000 -128,924,000 -99,966,000 -25,388,000 -21,307,000 -142,722,000 -102,676,000 -36,506,000 -166,054,000 -56,466,000 -68,145,000 -118,155,000 -46,781,000 -28,938,000 -126,407,000 -87,781,000 -9,858,000 -101,545,000 -53,628,000 -17,511,000 -78,187,000 -52,850,000 -17,662,000 -66,656,000 -8,223,000 -24,279,000 -70,819,000 -6,015,000 -3,536,000 -69,304,000 -39,237,000 -16,145,000 -20,618,000 -6,045,000 -2,081,000 -223,000 -63,000 -1,341,000 -4,365,000 -1,898,000 -5,494,000 -19,620,000 -13,426,000 -34,611,000 -30,859,000 -22,888,000 -40,269,000 -5,820,000 -21,215,000 -11,254,000 -24,655,000 -15,439,000 -28,338,000 -39,628,000 -26,303,000     
          financing activities:
                                                                               
          repayments of revolving credit facility
        -265,000,000 -190,000,000 -633,000,000 -347,000,000 -190,000,000 -489,100,000 -48,100,000                                                                 
          borrowings of revolving credit facility
        214,000,000 135,000,000 746,000,000 444,000,000 201,000,000 556,100,000 120,100,000                                                                 
          proceeds from stock option exercises
        229,000 313,000 2,463,000 2,463,000 541,000 1,993,000 1,993,000 84,000 2,250,000 2,204,000 95,000 1,008,000 907,000 3,678,000 3,678,000 908,000 2,591,000 2,137,000 2,154,000 1,798,000 4,165,000 4,018,000 1,949,000 1,288,000 1,288,000 2,925,000 248,000  -283,000 2,629,000 1,842,000  2,559,000 1,956,000  3,658,000 1,058,000  613,000 336,000  149,000   57,000         624,000 241,000  2,290,000   514,000 427,000  755,000 370,000     
          shares withheld for taxes
        -5,461,000 -132,000 -7,744,000 -7,644,000 -287,000 -7,968,000 -7,968,000 -90,000 -8,928,000 -8,927,000 -49,000 -11,230,000 -11,230,000 -6,350,000 -6,350,000 -1,000 -3,479,000 -3,404,000 -3,304,000 -3,268,000 -1,321,000 -1,302,000 -1,000 -1,211,000 -1,211,000                                            
          repayment of finance leases
        -221,000 -219,000 -4,203,000 -1,767,000 -1,668,000 -6,813,000 -4,437,000 -2,446,000 -9,650,000 -4,504,000 -3,917,000 -11,109,000 -5,525,000 -4,766,000 -9,950,000 -4,959,000 -4,945,000 -9,662,000 -4,803,000 -4,763,000 -9,036,000 -4,589,000                                                  
          net cash from financing activities
        -56,453,000 -55,038,000 103,516,000 90,052,000 7,969,000 153,989,000 61,447,000 -3,036,000 -17,305,000 -12,180,000 -3,871,000 -21,331,000 -15,848,000 -4,766,000 -12,622,000 -7,631,000 -49,038,000 23,521,000 98,070,000 -28,839,000 50,789,000 23,903,000 484,000 2,506,000 7,055,000 3,468,000 45,950,000 62,825,000 -17,509,000 35,967,000 37,436,000 -15,581,000 10,438,000 22,519,000 4,632,000 21,410,000 4,787,000 -13,377,000 41,388,000 -887,000 -20,197,000 18,487,000 13,931,000 -9,618,000 -8,422,000  59,000 57,000  -2,236,000 -22,008,000 -20,225,000 -1,423,000 -13,011,000 12,462,000 21,866,000 6,731,000 15,377,000 -11,361,000 -210,000 10,290,000   -2,308,000 609,000 755,000 370,000     
          net increase in cash and cash equivalents
        19,457,000 -15,780,000   5,068,000 -285,046,000  46,953,000 47,607,000 -20,965,000  31,283,000 34,737,000  27,552,000 27,952,000 -161,000 29,032,000 46,661,000       4,639,000 -1,140,000 -828,000 750,000 236,000 114,000 -4,416,000 -704,000 -4,171,000 -2,877,000 1,629,000 683,000  2,551,000 116,000   -1,257,000 -2,205,000 -18,329,000  1,837,000 4,883,000  -9,457,000   5,927,000   2,885,000 -4,390,000  -37,147,000 30,737,000 -11,646,000  854,000 3,310,000 -16,288,000 -9,846,000 -24,925,000 -410,000 10,444,000 1,263,000  
          cash and cash equivalents, beginning of period
        19,720,000  19,473,000 19,473,000  296,215,000 296,215,000  187,390,000 187,390,000  106,588,000 106,588,000  25,308,000 25,308,000  248,000 248,000  2,194,000 2,194,000  4,720,000 4,720,000  1,539,000 1,539,000 124,000 124,000 4,367,000 4,367,000  159,000 159,000  321,000 321,000  1,317,000 1,317,000  29,045,000 29,045,000  8,746,000 8,746,000  27,061,000 27,061,000  6,656,000 6,656,000  10,669,000 10,669,000  16,865,000 16,865,000  7,499,000 7,499,000  30,870,000 30,870,000  21,872,000 21,872,000  
          cash and cash equivalents, end of period
        39,177,000  18,837,000 16,535,000  11,169,000 12,308,000  234,997,000 166,425,000  137,871,000 141,325,000  52,860,000 53,260,000  29,280,000 46,909,000  503,000 31,000  1,189,000 496,000  399,000 711,000 750,000 360,000 238,000 -4,416,000 3,663,000 196,000  1,788,000 842,000  2,872,000 437,000  826,000 60,000  10,716,000 22,001,000  13,629,000 6,372,000  10,422,000 11,950,000  5,565,000 5,332,000  6,279,000 6,968,000  47,602,000 5,219,000  8,353,000 10,809,000  21,024,000 5,945,000  32,316,000 23,135,000  
          allowance for credit losses
                                                                               
          loss from property disposals
                                                                               
          stock-based compensation
                                                                               
          borrowings on private shelf agreement
            100,000,000                                                                  
          other financing activity
            -1,617,000 -223,000 -141,000 -584,000 -977,000 -953,000                                                              
          cash and cash equivalents, beginning of year
                                                                               
          cash and cash equivalents, end of year
                                                                               
          net decrease in cash and cash equivalents
          -636,000 -2,938,000   -283,907,000              -1,691,000 -2,163,000  -3,531,000 -4,224,000                 -491,000    -7,044,000   -2,374,000  -16,639,000 -15,111,000  -1,091,000 -1,324,000   -3,701,000              
          repayment of credit and private shelf agreements
                                                                               
          borrowing of credit and private shelf agreements
                                                                               
          repayments of revolving credit agreement
                   -1,000,000   -27,614,000                                                         
          borrowings of revolving credit agreement
                   1,000,000   27,614,000                           180,316,000                              
          change in other assets, liabilities
                 -10,145,000                                                              
          provision for doubtful accounts
                                                                               
          investment in equity securities
                                                                               
          repayment of revolving credit agreement
                       -7,713,000 -65,893,000 -221,026,000 -86,734,000 -110,203,000 -100,517,000 -55,780,000 -63,155,000 -92,475,000 -42,718,000 -58,812,000 -70,386,000 -15,441,000 -56,522,000 -73,372,000 -26,738,000 -62,555,000 -131,504,000 -72,277,000 -61,647,000 -191,430,000 -116,297,000 -56,859,000 -103,775,000 -58,496,000 -82,616,000 -151,371,000 -62,927,000                             
          borrowing of revolving credit agreement
                       7,713,000 20,893,000 255,097,000 190,874,000 86,127,000 161,515,000 86,388,000 68,155,000 99,475,000 50,550,000 67,313,000 125,400,000 80,624,000 42,023,000 116,128,000 65,564,000 52,088,000 144,504,000 93,854,000 66,647,000 213,852,000 119,128,000 53,314,000 153,162,000 56,551,000 73,215,000  76,522,000                             
          changes in operating assets and liabilities
                   -60,615,000 -21,566,000  -38,479,000 -15,384,000  10,605,000 -18,632,000  -19,086,000 -26,717,000  3,046,000 -12,261,000  -6,322,000 -12,757,000  -1,370,000 -13,213,000  3,460,000 -3,704,000  -8,515,000 -20,346,000  -17,224,000 -15,202,000  7,674,000 8,348,000  -11,663,000 -11,027,000  -14,032,000 -9,333,000                       
          net increase in cash, cash equivalents and restricted cash
                                                                               
          cash, cash equivalents and restricted cash, beginning of period
                                                                               
          cash, cash equivalents and restricted cash, end of period
                                                                               
          other working capital items
                                                                               
          claims, insurance and other
                                                                               
          debt issuance costs
                           -23,000 -646,000                                                  
          non cash investing activities
                                                                               
          equipment financed with finance leases
                           4,000 5,058,000                                                   
          repayment of senior notes
                                 -3,572,000 -3,571,000  -3,572,000 -3,572,000  -3,572,000 -3,571,000   -3,571,000   -11,071,000   -11,071,000                              
          changes in operating assets and liabilities, net of effects of acquisition:
                                                                               
          repayment of capital leases
                              -4,516,000 -7,338,000 -3,493,000 -3,409,000 -5,570,000 -2,435,000 -2,363,000 -3,465,000 -1,390,000                                         
          equipment financed with capital leases
                              1,038,000 22,422,000 5,318,000 4,163,000 28,691,000 20,369,000 34,683,000 10,032,000 3,075,000 17,336,000 3,471,000 8,558,000                                     
          acquisition of business, net of cash received
                                                                         -23,549,000 -23,040,000     
          acquisition of business
                                        -22,238,000 -23,080,000                       -2,344,000 -2,344,000              
          repayment of capital lease obligations
                                                                               
          payment of debt issuance costs
                                        -455,000      -545,000           -855,000 -1,758,000                     
          payment of capital lease obligations
                                        -1,165,000                                       
          other financing activities
                                         -900,000     -41,000                                 
          gain from property disposals
                                                                               
          repayment of long-term debt
                                                -11,072,000   -8,572,000 -8,571,000     -26,250,000 -20,250,000 -20,225,000 -1,423,000 -38,011,000 -12,538,000 -5,000,000 -1,401,000 -469,000 -2,500,000 -2,500,000  -8,002,000 -2,735,000        
          proceeds on stock option exercises
                                                                               
          acquisition of business, net of cash
                                                                               
          net investment in discontinued operations
                                                                  25,853,000 -5,359,000            
          acquisition of subsidiary, net of cash
                                                                               
          income on discontinued operations
                                                                               
          net proceeds from issuance of common shares
                                                                               
          loss on discontinued operations
                                                                               
          goodwill impairment charge
                                                                               
          changes in operating assets and liabilities, net:
                                                                               
          proceeds from long-term debt
                                                            25,000,000 25,000,000 26,195,000 12,916,000 21,013,000              
          repurchase of shares outstanding
                                                                               
          net loss
                                                       -1,243,000 -3,223,000                       
          noncash items included in net loss:
                                                                               
          noncash transactions:
                                                                               
          retire treasury shares
                                                                               
          supplemental cash flow information:
                                                                               
          income taxes paid
                                                         -247,000 1,826,000 908,000 287,000 517,000 20,000 353,000 2,504,000 192,000 537,000 1,494,000 223,000 2,575,000 294,000 -6,967,000 1,806,000 2,675,000 589,000 2,490,000 5,041,000 4,029,000  
          interest paid
                                                         4,375,000 5,371,000 2,040,000 4,243,000 6,469,000 2,233,000 4,767,000 3,229,000 307,000 4,151,000 6,667,000 4,005,000 926,000 4,917,000 2,130,000 2,681,000 4,750,000 2,097,000 2,680,000 4,670,000 1,998,000  
          net cash from operating activities—continuing operations
                                                          9,734,000   30,823,000 -360,000  19,855,000 3,927,000  27,609,000            
          net cash from (used in) discontinued operations
                                                                               
          net cash from operating activities—discontinued operations
                                                             717,000   -117,000 -117,000  9,158,000            
          proceeds from sale of subsidiary
                                                                  105,000 41,200,000            
          repurchase of common stock
                                                                -5,408,000 -5,408,000     -9,177,000         
          changes in assets and liabilities, net:
                                                                               
          accounts payable and checks outstanding
                                                                               
          acquisitions of businesses, net of cash received
                                                                               
          proceeds of stock option exercises
                                                                               
          issuance of note to seller in acquisition
                                                                               
          borrowing of long-term debt
                                                                    8,000,000  4,000,000         
          stock option exercises
                                                                    2,290,000        317,000 296,000  
          net cash (used in) from financing activities
                                                                      -12,665,000         
          cumulative effect of change in accounting for goodwill
                                                                               
          losses from property disposals
                                                                               
          stock based compensation for directors
                                                                               
          acquisition of subsidiary, net of cash received
                                                                               
          proceeds from the issuance of long-term debt
                                                                               
          net change in notes to former parent
                                                                               
          decrease in notes to former parent
                                                                               
          equity contribution by former parent
                                                                               
          equity contribution from former parent
                                                                               
          assumption of subordinated debentures from former parent
                                                                               
          transfer of other assets from former parent
                                                                               
          proceeds from issuance of long-term debt
                                                                               
          net increase in cash
                                                                              903,000 
          cash at beginning of period
                                                                              1,480,000 
          cash at end of period
                                                                              2,383,000 
          non cash transactions: