7Baggers

United States Lime & Minerals, Inc
(NASDAQ:USLM) 

USLM stock logo

United States Lime & Minerals, Inc. manufactures and supplies lime and limestone products in the United States. The company extracts limestone from open-pit quarries and an underground mine, and processes it as pulverized limestone, quicklime, hydrated lime, and lime slurry. It supplies its products...

Founded: 1950
Full Time Employees: 282
Sector: Basic Materials
Industry: Building Materials

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Quarterly
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    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 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 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 2003-12-31 
                                                                                         
      revenues
    87,833,000 87,940,000 102,016,000 91,518,000 91,253,000 80,062,000 89,427,000 76,545,000 71,687,000 65,692,000 74,878,000 73,983,000 66,777,000 58,292,000 66,457,000 60,492,000 50,909,000 46,108,000 52,311,000 49,162,000 41,674,000 40,990,000 43,727,000 37,547,000 38,440,000                                                     -48,413,015,000 15,904,100,000 17,124,100,000 12,075,100,000 -42,541,421,000 15,770,100,000 14,752,100,000  
      cost of revenues
                                                                                         
      labor and other operating expenses
    39,561,000 39,121,000 43,752,000 43,532,000 39,047,000 38,663,000 40,282,000 35,839,000 35,101,000 36,134,000 40,827,000 40,940,000 37,029,000 35,869,000 38,221,000 38,538,000 31,259,000 27,591,000 29,981,000 27,200,000 24,593,000 22,664,000 24,665,000 22,447,000 23,962,000 23,280,000 25,887,000 25,002,000 25,038,000 18,269,250 23,687,000 25,317,000 24,073,000 17,611,750 23,142,000 23,626,000 23,679,000 16,900,750 24,064,000 21,710,000 21,829,000 16,140,750 22,695,000 21,552,000 20,316,000 25,461,000 24,586,000 24,543,000 24,200,000 22,609,000 21,641,000 22,620,000 24,444,000 23,257,000 23,151,000 23,058,000 20,286,000 16,215,000 19,831,000 24,108,000 20,921,000 14,383,000 19,772,000 19,046,000 18,714,000 19,189,000 26,591,000 26,846,000 23,319,000 16,325,000 22,503,000 21,835,000 20,962,000 998,241,300 2,137,667,400 2,123,366,500 19,620,000 -2,667,418,100 864,354,400 938,254,800 704,258,300 -2,358,120,100 859,554,500 825,556,000  
      depreciation, depletion and amortization
    6,520,000 6,644,000 6,075,000 6,108,000 6,050,000 5,960,000 6,032,000 5,884,000 5,979,000 5,969,000 5,896,000 5,912,000 5,756,000 5,619,000 5,646,000 5,473,000 5,183,000 5,198,000 4,989,000 5,167,000 5,276,000 5,155,000 4,880,000 4,743,000 4,601,000 4,912,000 4,189,000 4,225,000 4,068,000 4,537,000 4,389,000 4,288,000 4,177,000 3,810,000 4,240,000 4,054,000 4,236,000 4,076,000 4,017,000 3,929,000 3,909,000 4,048,000 3,967,000 3,885,000 3,884,000 3,729,000 3,667,000 3,556,000 3,589,000 3,599,000 3,653,000 3,737,000 3,701,000 3,568,000 3,492,000 3,383,000 3,368,000 3,701,000 3,173,000 3,259,000 3,174,000 3,225,000 3,207,000 3,278,000 3,372,000 3,314,000 3,397,000 3,173,000 3,151,000 3,256,000 3,171,000 3,181,000 2,856,000 -48,719,600 24,697,800 23,007,200 2,281,000 -576,931,000 198,012,400 197,811,600 161,813,400 -545,090,000 201,612,800 189,212,800  
      gross profit
    41,752,000 42,175,000 52,189,000 41,878,000 46,156,000 35,439,000 43,113,000 34,822,000 30,607,000 23,589,000 28,155,000 27,131,000 23,992,000 16,804,000 22,590,000 16,481,000 14,467,000 13,319,000 17,341,000 16,795,000 11,805,000 13,171,000 14,182,000 10,357,000 9,877,000 9,773,000 13,483,000 9,727,000 8,693,000 6,616,000 7,196,000 9,637,000 7,037,000 7,752,000 9,552,000 8,838,000 8,238,000 7,434,000 10,569,000 7,241,000 7,848,000 5,470,000 10,367,000 7,013,000 5,864,000 9,883,000 10,423,000 8,592,000 9,110,000 8,964,000 6,291,000 7,759,000 8,353,000 9,203,000 12,539,000 10,399,000 9,412,000 7,097,000 8,865,000 10,559,000 9,520,000 7,080,000 8,634,000 6,812,000 6,227,000 4,416,000 8,938,000 11,164,000 6,765,000 5,930,000 7,271,000 7,193,000 5,622,000 -1,515,388,200 786,324,800 840,126,300 6,396,000 -1,524,065,900 528,133,200 576,433,700 341,528,300 329,482,725 515,932,700 460,531,200  
      yoy
    -9.54% 19.01% 21.05% 20.26% 50.80% 50.24% 53.13% 28.35% 27.57% 40.38% 24.63% 64.62% 65.84% 26.17% 30.27% -1.87% 22.55% 1.12% 22.27% 62.16% 19.52% 34.77% 5.18% 6.48% 13.62% 47.72% 87.37% 0.93% 23.53% -14.65% -24.66% 9.04% -14.58% 4.28% -9.62% 22.05% 4.97% 35.90% 1.95% 3.25% 33.83% -44.65% -0.54% -18.38% -35.63% 10.25% 65.68% 10.74% 9.06% -2.60% -49.83% -25.39% -11.25% 29.67% 41.44% -1.52% -1.13% 0.24% 2.68% 55.01% 52.88% 60.33% -3.40% -38.98% -7.95% -25.53% 22.93% 55.21% 20.33% -100.39% -99.08% -99.14% -12.10% -0.57% 48.89% 45.75% -98.13% -562.56% 2.36% 25.17%      
      qoq
    -1.00% -19.19% 24.62% -9.27% 30.24% -17.80% 23.81% 13.77% 29.75% -16.22% 3.77% 13.08% 42.78% -25.61% 37.07% 13.92% 8.62% -23.19% 3.25% 42.27% -10.37% -7.13% 36.93% 4.86% 1.06% -27.52% 38.61% 11.89% 31.39% -8.06% -25.33% 36.95% -9.22% -18.84% 8.08% 7.28% 10.82% -29.66% 45.96% -7.73% 43.47% -47.24% 47.83% 19.59% -40.67% -5.18% 21.31% -5.69% 1.63% 42.49% -18.92% -7.11% -9.24% -26.60% 20.58% 10.49% 32.62% -19.94% -16.04% 10.91% 34.46% -18.00% 26.75% 9.39% 41.01% -50.59% -19.94% 65.03% 14.08% -18.44% 1.08% 27.94% -100.37% -292.72% -6.40% 13035.18% -100.42% -388.58% -8.38% 68.78% 3.66% -36.14% 12.03%   
      selling, general, and administrative expenses
    5,969,000 6,161,000 5,927,000 6,189,000 6,262,000                                                                                 
      operating profit
    35,783,000 36,014,000 46,262,000 35,689,000 39,894,000 31,087,000 38,137,000 29,940,000 25,759,000 18,970,000 23,800,000 22,812,000 19,840,000 12,271,000 19,047,000 12,633,000 10,832,000 9,645,000 14,196,000 13,838,000 8,738,000 8,462,000 11,273,000 7,476,000 6,658,000 5,583,000 10,555,000 7,088,000 6,020,000 3,988,000 4,406,000 7,072,000 4,536,000 5,194,000 6,895,000 6,320,000 5,818,000 5,035,000 8,087,000 4,910,000 5,448,000 3,108,000 7,900,000 4,613,000 3,465,000 7,479,000 8,005,000 6,410,000 6,887,000 6,665,000 4,148,000 5,669,000 6,026,000 6,936,000 10,242,000 8,318,000 7,227,000 4,909,000 6,987,000 8,614,000 7,155,000 5,145,000 6,611,000 4,894,000 4,305,000 2,395,000 6,907,000 9,167,000 4,848,000 3,768,000 5,344,000 5,401,000 3,859,000 -1,116,794,600 612,419,300 663,120,800 4,692,000 -1,123,979,500 393,924,800 445,026,000 222,718,400 238,280,600 391,324,800 339,123,000  
      yoy
    -10.30% 15.85% 21.30% 19.20% 54.87% 63.87% 60.24% 31.25% 29.83% 54.59% 24.95% 80.57% 83.16% 27.23% 34.17% -8.71% 23.96% 13.98% 25.93% 85.10% 31.24% 51.57% 6.80% 5.47% 10.60% 39.99% 139.56% 0.23% 32.72% -23.22% -36.10% 11.90% -22.04% 3.16% -14.74% 28.72% 6.79% 62.00% 2.37% 6.44% 57.23% -58.44% -1.31% -28.03% -49.69% 12.21% 92.98% 13.07% 14.29% -3.91% -59.50% -31.85% -16.62% 41.29% 46.59% -3.44% 1.01% -4.59% 5.69% 76.01% 66.20% 114.82% -4.29% -46.61% -11.20% -36.44% 29.25% 69.73% 25.63% -100.34% -99.13% -99.19% -17.75% -0.64% 55.47% 49.01% -97.89% -571.70% 0.66% 31.23%      
      qoq
    -0.64% -22.15% 29.63% -10.54% 28.33% -18.49% 27.38% 16.23% 35.79% -20.29% 4.33% 14.98% 61.68% -35.58% 50.77% 16.63% 12.31% -32.06% 2.59% 58.37% 3.26% -24.94% 50.79% 12.29% 19.25% -47.11% 48.91% 17.74% 50.95% -9.49% -37.70% 55.91% -12.67% -24.67% 9.10% 8.63% 15.55% -37.74% 64.70% -9.88% 75.29% -60.66% 71.26% 33.13% -53.67% -6.57% 24.88% -6.93% 3.33% 60.68% -26.83% -5.92% -13.12% -32.28% 23.13% 15.10% 47.22% -29.74% -18.89% 20.39% 39.07% -22.18% 35.08% 13.68% 79.75% -65.33% -24.65% 89.09% 28.66% -29.49% -1.06% 39.96% -100.35% -282.36% -7.65% 14033.01% -100.42% -385.33% -11.48% 99.82% -6.53% -39.11% 15.39%   
      other expense
    -3,229,000 -3,553,000 -3,416,000 -3,098,000 -3,091,000 -3,073,000 -3,061,000 -2,786,000 -2,540,000 -2,411,000 -2,197,000                           -146,000 -115,000 -80,000  -82,000 -54,000 712,000                                          
      income before income tax expense
    39,012,000 39,567,000 49,678,000 38,787,000 42,985,000 34,160,000 41,198,000 32,726,000 28,299,000 21,381,000 25,997,000 24,637,000 21,347,000 13,425,000 19,561,000 12,747,000 10,829,000 9,661,000 14,280,000 13,867,000 8,710,000 8,451,000 11,260,000 7,518,000 6,843,000 5,961,000 10,971,000 7,518,000 6,450,000 4,438,000 4,835,000 7,468,000 4,827,000                                                     
      income tax expense
    8,430,000 9,018,000 10,896,000 7,956,000 8,872,000 7,170,000 7,845,000 6,669,000 5,860,000 4,381,000 5,264,000 4,925,000 4,243,000 2,628,000 3,835,000 2,509,000 2,161,000 2,048,000 2,972,000 2,774,000 1,679,000 1,197,000 1,936,000 1,417,000 1,299,000 968,000 1,069,000 1,485,000 1,322,000 207,000 281,000 830,000 565,000 -6,164,000 1,433,000 1,208,000 1,318,000 1,200,000 2,058,000 1,240,000 1,366,000 837,000 2,221,000 752,000 785,000 1,674,000 1,934,000 1,517,000 1,588,000 1,610,000 941,000 1,199,000 1,501,000 1,710,000 2,612,000 1,938,000 1,782,000 1,100,000 1,748,000 2,329,000 1,841,000 1,332,000 1,458,000 863,000 821,000 232,000 1,438,000 2,241,000 1,067,000 815,000 1,106,000 1,166,000 806,000 -11,463,700 15,875,000 16,225,100 985,000 -14,529,400 5,033,200 7,584,400 2,081,700     
      net income
    30,582,000 30,549,000 38,782,000 30,831,000 34,113,000 26,990,000 33,353,000 26,057,000 22,439,000 17,000,000 20,733,000 19,712,000 17,104,000 10,797,000 15,726,000 10,238,000 8,668,000 7,613,000 11,308,000 11,093,000 7,031,000 7,254,000 9,324,000 6,101,000 5,544,000 4,993,000 9,902,000 6,033,000 5,128,000 4,231,000 4,554,000 6,638,000 4,262,000 11,583,000 5,667,000 5,278,000 4,620,000 3,920,000 6,081,000 3,687,000 4,066,000 2,286,000 5,676,000 2,559,000 2,365,000 5,426,000 5,718,000 4,492,000 4,789,000 4,626,000 2,757,000 3,947,000 4,060,000 4,624,000 7,062,000 5,795,000 4,813,000 3,169,000 4,546,000 5,663,000 4,662,000 3,033,000 4,495,000 3,406,000 2,736,000 1,058,000 4,475,000 6,057,000 2,843,000 2,038,000 3,182,000 3,167,000 2,059,000 -622,009,400 390,612,300 434,313,600 2,297,000 -626,765,100 194,312,200 290,917,000 8,306,900 125,302,950 173,011,000 245,216,600  
      yoy
    -10.35% 13.19% 16.28% 18.32% 52.03% 58.76% 60.87% 32.19% 31.19% 57.45% 31.84% 92.54% 97.32% 41.82% 39.07% -7.71% 23.28% 4.95% 21.28% 81.82% 26.82% 45.28% -5.84% 1.13% 8.11% 18.01% 117.44% -9.11% 20.32% -63.47% -19.64% 25.77% -7.75% 195.48% -6.81% 43.15% 13.63% 71.48% 7.14% 44.08% 71.92% -57.87% -0.73% -43.03% -50.62% 17.29% 107.40% 13.81% 17.96% 0.04% -60.96% -31.89% -15.65% 45.91% 55.35% 2.33% 3.24% 4.48% 1.13% 66.27% 70.39% 186.67% 0.45% -43.77% -3.76% -48.09% 40.63% 91.25% 38.08% -100.33% -99.19% -99.27% -10.36% -0.76% 101.02% 49.29% -72.35% -600.20% 12.31% 18.64%      
      qoq
    0.11% -21.23% 25.79% -9.62% 26.39% -19.08% 28.00% 16.12% 31.99% -18.01% 5.18% 15.25% 58.41% -31.34% 53.60% 18.11% 13.86% -32.68% 1.94% 57.77% -3.07% -22.20% 52.83% 10.05% 11.04% -49.58% 64.13% 17.65% 21.20% -7.09% -31.39% 55.75% -63.20% 104.39% 7.37% 14.24% 17.86% -35.54% 64.93% -9.32% 77.87% -59.73% 121.81% 8.20% -56.41% -5.11% 27.29% -6.20% 3.52% 67.79% -30.15% -2.78% -12.20% -34.52% 21.86% 20.40% 51.88% -30.29% -19.72% 21.47% 53.71% -32.53% 31.97% 24.49% 158.60% -76.36% -26.12% 113.05% 39.50% -35.95% 0.47% 53.81% -100.33% -259.24% -10.06% 18807.86% -100.37% -422.56% -33.21% 3402.11% -93.37% -27.58% -29.45%   
      net income per share
                                                                                         
      basic
    1.07 1.07 1.35 1.08 1.19 0.95 1.17 0.91 3.93 2.99 3.64 3.46 3.01 1.9 2.77 1.8 1.53 1.35 1.96 1.24 1.28 1.66 1.08 0.99 0.89 1.76 1.07 0.91 0.76 0.81 1.19 0.76 2.08 1.02 0.95 0.83 0.71 1.09 0.66 0.73                                             
      diluted
    1.06 1.06 1.35 1.07 1.19 0.94 1.16 0.91 3.92 2.97 3.63 3.45 1.9 2.77 1.8 1.53 1.35 1.99 1.96 1.24 1.28 1.65 1.08 0.98 0.89 1.76 1.07 0.91 0.75 0.81 1.18 0.76 2.07 1.01 0.94 0.83 0.71 1.09 0.66 0.73                                             
      selling, general and administrative expenses
         4,352,000 4,976,000 4,882,000 4,848,000 4,619,000 4,355,000 4,319,000 4,152,000 4,533,000 3,543,000 3,848,000 3,635,000 3,674,000 3,145,000 2,957,000 3,067,000 3,159,000 2,909,000 2,881,000 3,219,000 3,260,000 2,928,000 2,639,000 2,673,000 1,964,000 2,790,000 2,565,000 2,501,000 1,898,750 2,657,000 2,518,000 2,420,000 1,803,250 2,482,000 2,331,000 2,400,000 1,816,500 2,467,000 2,400,000 2,399,000 2,404,000 2,418,000 2,182,000 2,223,000 2,299,000 2,143,000 2,090,000 2,327,000 2,267,000 2,297,000 2,081,000 2,185,000 1,547,000 1,878,000 1,945,000 2,365,000 1,465,750 2,023,000 1,918,000 1,922,000 1,486,250 2,031,000 1,997,000 1,917,000 1,370,500 1,927,000 1,792,000 1,763,000 10,141,650 17,395,500 17,705,500 1,704,000 -35,046,400 13,428,400 13,147,700 11,889,900 -31,448,500 12,467,900 12,148,200  
      interest expense
               64,000 64,000 64,000 64,000 63,000 63,000 63,000 63,000 62,000 62,000 62,000 62,000 62,000 62,000 61,000 61,000 60,000 62,000 52,000 66,000 63,000 62,000 67,000 56,000 59,000 59,000 61,000 63,000 63,000 59,000 67,000 57,000 590,000 322,000 369,000 408,000 399,000 451,000 465,000 489,000 539,000 542,000 576,000 618,000 627,000 653,000 688,000 707,000 666,000 654,000 698,000 707,000 731,000 750,000 762,000 834,000 911,000 979,000 1,028,000 1,081,000 1,146,000 1,032,000 -32,499,800 7,352,300 7,812,400 836,000 -31,434,300 15,549,800 8,685,100 120,710,000 -478,481,300 205,613,000 157,910,700  
      interest and other income
               -1,889,000 -1,571,000 -1,218,000 -578,000 -177,000 -60,000 -79,000 -147,000 -91,000 -34,000 -51,000 -49,000 -104,000 -247,000 -439,000 -477,000 -490,000 -492,000 -502,000 -495,000 -459,000 -353,000                                                     
      lime and limestone operations
                             29,827,750 43,265,000 38,581,000 37,465,000 33,938,000 34,713,000 38,557,000 34,714,000 34,702,000 36,428,000 35,965,000 35,517,000 33,564,000 38,096,000 32,376,000 33,154,000 30,797,000 36,452,000 31,779,000 29,362,000 37,855,000 37,320,000 35,051,000 35,498,000 33,684,000 30,155,000 32,558,000 34,729,000 33,905,000 35,658,000 33,382,000 30,202,000 27,079,000 30,458,000 36,151,000 31,481,000 26,383,000 29,871,000 27,639,000 26,513,000 25,562,000 33,602,000 36,420,000 30,581,000 28,066,000 31,074,000 29,822,000 27,607,000 -61,096,987,000 3,048,396,100 3,082,496,500 27,719,000         
      natural gas interests
                             250,250 294,000 373,000 334,000 696,000 559,000 685,000 573,000 537,000 506,000 553,000 636,000 602,000 554,000 504,000 432,000     1,218,000 1,356,000 1,640,000  1,488,000 1,430,000 1,558,000 1,769,000 2,123,000 3,524,000 3,458,000 2,864,000 2,105,000 1,411,000 1,775,000 2,134,000 1,886,000 1,742,000 1,497,000 1,800,000 3,450,000 5,324,000 4,763,000 2,654,000 2,576,000 1,871,000 2,387,000 1,833,000  12,253,900 11,103,500 578,000         
      cash dividends per share of common stock
                                 0.101 0.135 0.135 0.135 0.135 0.135 0.135 0.135 0.125 0.125 0.125 0.125 0.125 0.125 0.125 0.125                                         
      other income
                                     -166,250 -261,000 -225,000 -179,000    -43,000        59,000                                     
      income before income taxes
                                     4,881,000 7,100,000 6,486,000 5,938,000 5,120,000 8,139,000 4,927,000 5,432,000 3,123,000 7,897,000 3,311,000 3,150,000 7,100,000 7,652,000 6,009,000 6,377,000 6,236,000 3,698,000 5,146,000 5,561,000 6,334,000 9,674,000 7,733,000 6,595,000 4,269,000 6,294,000 7,992,000 6,503,000 4,365,000 5,953,000 4,269,000 3,557,000 4,530,250 5,913,000 8,298,000 3,910,000         -788,444,500 244,615,400 366,721,400 10,388,600 153,728,625 204,713,000 306,420,800  
      cost of revenues:
                                                                                         
      other expense:
                                                                                         
      natural gas
                                             487,500 577,000 671,000 702,000    1,401,000                                     
      other expenses
                                                -7,000                                         
      income per share of common stock:
                                                                                         
      basic
                                             0.473 1.01 0.46 0.42 0.97 1.03 0.81 0.86 0.83 0.5 0.71 0.73 0.75 1.12 0.9 0.75 0.58 0.71 0.88 0.73 0.42 0.71 0.54 0.43 0.53 0.71 0.96 0.45         0.27 0.33 0.49 0.14 0.215 0.3 0.42  
      diluted
                                             0.473 1.01 0.46 0.42 0.97 1.02 0.8 0.86 0.83 0.5 0.71 0.73 0.75 1.11 0.9 0.75 0.58 0.71 0.88 0.73 0.418 0.7 0.53 0.43 0.525 0.7 0.95 0.45         0.263 0.31 0.49 0.14 0.213 0.29 0.42  
      other
                                                 10,000 -55,000 2,000  -36,000 -39,000 -16,000 -77,000 26,000 -50,000 -42,000 -21,000 -48,000 -14,000 -44,000 -2,000 82,000 -49,000 -106,000 -2,000 343,000 160,000 -42,000 -41,000 -113,000 -25,000 -78,000 -38,000    24,000         
      cash dividend per share of common stock
                                                 0.125 0.125 0.125                                      
      other income:
                                                                                         
      income before income taxes and cumulative effect of change in accounting principle
                                                                         2,853,000 4,288,000 4,333,000 2,865,000 -780,073,000 549,317,300 596,518,700 3,832,000         
      net income before cumulative effect of change in accounting principle
                                                                         2,102,000 3,182,000 3,167,000 2,059,000 -621,459,400 390,612,300 434,313,600 2,847,000         
      cumulative effect of change in accounting principle, net of 190 income tax benefit
                                                                                -550,000         
      income per share of common stock:
                                                                                         
      basic before cumulative effect of change in accounting principle
                                                                         0.33 0.51 0.51 0.33 1.07 0.63 0.7 0.47         
      cumulative effect of change in accounting principle
                                                                                -0.09         
      diluted before cumulative effect of change in accounting principle
                                                                         0.32 0.5 0.5 0.33 1.06 0.62 0.69 0.46         
      other incomes
                                                                                         
      other (income)
                                                                                         
      income tax benefit
                                                                                     2,843,175 3,172,000 6,124,200  
    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 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 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 2003-12-31 
                                                                                           
        assets
                                                                                           
        current assets
                                                                                           
        cash and cash equivalents
      383,165,000 371,124,000 349,514,000 319,910,000 300,634,000 278,031,000 255,022,000 222,501,000 206,995,000 187,964,000 176,305,000 156,198,000 147,575,000 133,384,000 122,659,000 108,581,000 100,864,000 105,355,000 101,402,000 91,347,000 89,651,000 83,562,000 71,310,000 68,835,000 58,796,000 54,260,000 80,731,000 73,672,000 68,341,000 67,218,000 83,166,000 82,346,000 83,265,000 85,000,000 82,245,000 81,591,000 75,813,000 74,712,000 68,940,000 62,958,000 60,626,000 59,926,000 54,519,000 47,774,000 60,469,000 58,272,000 56,015,000 48,487,000 43,401,000 36,873,000 33,488,000 27,353,000 21,303,000 16,286,000 46,374,000 46,260,000 38,586,000 36,223,000 32,779,000 24,348,000 18,213,000 16,466,000 11,705,000 1,813,000 2,438,000 836,000 228,000 933,000 906,000 1,079,000 635,000 556,000 284,000 285,000 474,000 604,000 725,000 1,312,000 268,000 27,000 207,000 227,000 1,199,000 946,000 6,375,000 
        trade receivables
      58,111,000 47,933,000 59,296,000 54,392,000 55,772,000 43,982,000 52,905,000 46,284,000 42,155,000 38,052,000 44,061,000 40,735,000 38,356,000 33,592,000 39,559,000 37,123,000 32,871,000 26,715,000 29,242,000 27,547,000 23,957,000 22,979,000 24,846,000 21,192,000 23,148,000 22,948,000 23,180,000 22,946,000 22,710,000 19,602,000 18,373,000 20,923,000 19,074,000 16,473,000 18,242,000 18,887,000 20,025,000 16,781,000 19,385,000 17,405,000 16,837,000 15,889,000 19,214,000 16,727,000 16,028,000 19,687,000 17,737,000 18,832,000 17,767,000 17,724,000 16,776,000 16,329,000 16,716,000 17,118,000 18,742,000 18,149,000 18,402,000 13,839,000 13,964,000 18,760,000 17,975,000 13,365,000 14,103,000 15,835,000 12,979,000 14,492,000 18,914,000 19,763,000 14,572,000 13,210,000 14,590,000 15,753,000 16,096,000 13,002,000 15,451,000 14,211,000 14,958,000 11,360,000 9,450,000 9,910,000 10,306,000 9,466,000 9,467,000 8,777,000 6,959,000 
        inventories
      30,607,000 30,908,000 28,681,000 25,595,000 27,860,000 27,686,000 27,783,000 27,300,000 25,724,000 24,313,000 23,778,000 22,350,000 22,046,000 19,579,000 17,652,000 16,719,000 16,540,000 15,116,000 14,760,000 14,623,000 15,409,000 15,210,000 15,062,000 14,422,000 13,534,000 13,388,000 13,237,000 12,329,000 12,821,000 12,846,000 12,903,000 12,257,000 12,599,000 13,546,000 12,531,000 11,346,000 11,817,000 12,433,000 12,713,000 13,490,000 13,772,000 14,728,000 14,121,000 13,637,000 13,886,000 12,859,000 11,539,000 11,992,000 13,550,000 14,177,000 13,689,000 12,395,000 11,201,000 10,969,000 9,503,000 9,693,000 10,301,000 10,600,000 10,751,000 9,328,000 9,041,000 9,460,000 10,107,000 10,981,000 12,249,000 12,297,000 11,817,000 11,462,000 10,636,000 9,887,000 9,916,000 9,492,000 8,723,000 8,576,000 7,864,000 7,050,000 6,845,000 7,705,000 6,113,000 5,206,000 5,172,000 5,113,000 4,952,000 4,740,000 4,609,000 
        prepaid expenses and other current assets
      4,382,000 5,351,000 2,795,000 3,549,000 4,071,000 5,083,000 2,749,000 3,466,000 4,001,000 4,640,000 2,250,000 2,824,000 2,826,000 3,435,000 2,162,000 2,197,000 2,491,000 3,244,000 1,401,000 1,800,000 2,428,000 2,245,000 1,850,000 1,243,000 1,890,000 2,139,000 1,660,000 1,351,000 1,476,000 1,692,000 2,326,000 2,558,000 2,579,000 2,996,000 1,576,000 1,180,000 1,067,000 1,110,000 718,000 869,000 1,068,000 1,418,000 927,000 1,353,000 1,757,000 1,371,000 1,138,000 1,855,000 1,573,000 1,864,000 1,824,000 772,000 919,000 1,170,000 1,109,000 717,000 1,072,000 1,225,000 261,000 401,000 965,000 1,469,000 815,000            721,000 596,000   254,000 399,000 576,000  334,000 347,000  
        total current assets
      476,265,000 455,316,000 440,286,000 403,446,000 388,337,000 354,782,000 338,459,000 299,551,000 278,875,000 254,969,000 246,394,000 222,107,000 210,803,000 189,990,000 182,032,000 164,620,000 152,766,000 150,430,000 146,805,000 135,317,000 131,445,000 123,996,000 113,068,000 105,692,000 97,368,000 92,735,000 118,808,000 110,298,000 105,348,000 101,358,000 116,768,000 118,084,000 117,517,000 118,015,000 114,594,000 113,004,000 108,722,000 105,036,000 101,756,000 94,722,000 92,303,000 91,961,000 88,781,000 79,491,000 92,140,000 92,189,000 86,429,000 81,166,000 76,291,000 70,638,000 65,777,000 56,849,000 50,139,000 45,543,000 75,728,000 74,819,000 68,361,000 61,887,000 57,755,000 52,837,000 46,194,000 40,760,000 36,730,000 29,861,000 28,846,000 28,961,000 31,461,000 32,829,000 27,016,000 25,331,000 25,874,000 26,349,000 25,905,000 22,776,000 24,510,000 22,461,000 23,936,000 21,994,000 16,085,000 15,542,000 16,261,000  15,952,000 14,810,000 18,664,000 
        property, plant, and equipment
      570,861,000 554,612,000 535,132,000 520,832,000 507,950,000                                                                                 
        less accumulated depreciation and depletion
      -338,769,000 -333,191,000 -327,220,000 -321,609,000 -316,140,000 -310,355,000 -305,318,000 -299,493,000 -294,604,000 -289,803,000 -284,469,000 -280,019,000 -274,469,000 -269,627,000 -264,858,000 -260,421,000 -255,934,000 -251,389,000 -246,648,000 -242,476,000 -240,993,000 -235,739,000 -231,534,000 -228,328,000 -224,074,000 -219,668,000 -215,413,000 -212,079,000 -208,393,000 -205,708,000 -201,522,000 -197,909,000 -194,435,000 -190,518,000 -190,216,000 -186,193,000 -183,120,000 -180,613,000 -177,961,000 -174,136,000 -171,071,000 -167,308,000               -106,211,000 -102,962,000 -99,417,000 -100,415,000 -97,153,000 -93,955,000    -82,501,000    -81,950,000                
        operating lease right-of-use assets
      3,481,000 3,864,000 4,153,000 4,295,000 4,643,000 4,855,000 4,964,000 4,629,000 4,897,000 5,273,000 5,010,000 5,254,000 5,307,000 5,372,000 4,030,000 3,087,000 3,386,000 3,144,000 2,982,000 1,713,000 1,929,000 2,226,000 2,252,000 2,536,000 2,802,000 3,192,000 3,535,000 4,054,000 4,020,000                                                         
        other assets
      1,999,000 443,000 453,000 458,000 465,000 635,000 546,000 2,127,000 548,000 565,000 590,000 480,000 444,000 440,000 438,000 441,000 442,000 450,000 495,000 546,000 398,000 415,000 344,000 382,000 408,000 423,000 457,000 493,000 514,000 549,000 573,000 605,000 686,000 713,000 168,000 145,000 137,000 142,000 144,000 151,000 155,000 160,000 138,000 140,000 134,000 161,000 171,000 183,000 208,000 220,000 233,000 258,000 272,000 284,000 316,000 330,000 352,000 374,000 395,000 411,000 351,000 410,000 468,000 402,000 587,000 604,000 576,000 634,000 691,000 745,000 946,000 2,310,000 1,257,000 1,498,000 1,534,000 2,589,000 1,916,000 1,439,000 1,683,000 1,133,000 1,595,000 888,000 775,000 1,392,000 1,670,000 
        total assets
      713,837,000 681,044,000 652,804,000 607,422,000 585,255,000 543,163,000 521,759,000 484,155,000 463,996,000 440,602,000 424,055,000 402,372,000 387,745,000 367,772,000 355,880,000 336,733,000 324,747,000 316,196,000 310,908,000 297,112,000 285,410,000 279,098,000 271,707,000 259,270,000 251,867,000 247,037,000 273,833,000 261,473,000 255,069,000 244,671,000 246,015,000 238,682,000 231,033,000 228,446,000 222,359,000 219,509,000 213,629,000 210,159,000 205,330,000 198,200,000 195,814,000 196,499,000 193,483,000 186,237,000 200,150,000 197,995,000 193,020,000 188,847,000 186,017,000 181,866,000 177,903,000 173,490,000 169,146,000 165,525,000 198,429,000 197,790,000 192,618,000 188,498,000 185,185,000 181,790,000 175,864,000 172,070,000 168,269,000 163,564,000 164,640,000 166,129,000 168,404,000 168,612,000 160,760,000 158,227,000 159,554,000 161,474,000 159,694,000 154,168,000 149,983,000 141,550,000 131,705,000 123,024,000 104,972,000 101,274,000 102,448,000  97,614,000 97,563,000 99,500,000 
        liabilities and stockholders’ equity
                                                                                           
        current liabilities
                                                                                           
        accounts payable
      11,714,000 14,516,000 11,892,000 11,099,000 9,233,000 8,819,000 8,496,000 7,186,000 6,980,000 7,404,000 8,070,000 7,511,000 8,830,000 7,725,000 7,141,000 7,100,000 5,474,000 5,433,000 5,712,000 5,309,000 5,675,000 4,592,000 5,267,000 4,212,000 4,831,000 4,430,000 6,521,000 4,952,000 6,109,000 4,570,000 8,848,000 6,234,000 5,697,000 6,263,000 4,921,000 5,616,000 5,005,000 5,587,000 4,216,000 3,916,000 4,199,000 6,022,000 4,075,000 3,587,000 4,656,000 4,823,000 4,499,000 3,458,000 6,029,000 5,711,000 4,928,000 6,103,000 5,759,000 4,799,000 5,772,000 5,649,000 5,319,000 4,545,000 4,741,000 5,791,000 5,296,000 6,122,000 5,572,000 5,255,000 5,846,000 6,972,000 9,397,000 11,246,000 7,304,000 7,980,000 9,003,000 7,940,000 7,814,000 10,279,000 10,731,000 8,568,000 8,700,000 4,522,000 4,307,000 3,815,000 4,928,000   2,524,000  
        current portion of operating lease liabilities
      1,618,000 1,643,000 1,643,000 1,588,000 1,602,000 1,602,000 1,531,000 1,506,000 1,520,000 1,582,000 1,494,000 1,457,000 1,199,000 1,411,000 1,074,000 794,000 909,000 899,000 903,000 914,000 1,073,000 1,187,000 1,130,000 1,169,000 1,220,000 1,294,000 1,351,000 1,465,000 1,425,000                                                         
        accrued expenses
      9,643,000 7,473,000 9,611,000 5,861,000 14,556,000 6,541,000 8,671,000 5,377,000 10,746,000 8,505,000 6,438,000 5,596,000 8,683,000 6,401,000 6,472,000 4,522,000 4,554,000 4,856,000 5,243,000 4,382,000 3,995,000 5,809,000 4,675,000 3,843,000 2,514,000 3,735,000 3,438,000 3,025,000 2,343,000 3,393,000 2,997,000 2,425,000 1,999,000 3,096,000 2,925,000 4,541,000 4,114,000 3,521,000 3,276,000 2,305,000 2,819,000 2,720,000 3,771,000 2,196,000 2,547,000 4,083,000 3,306,000 4,397,000 3,892,000 3,158,000 4,070,000 4,000,000 3,767,000 4,596,000 4,706,000 4,564,000 5,213,000 6,166,000 5,437,000 5,134,000 5,426,000 5,028,000 4,497,000 3,933,000 3,669,000 4,251,000 3,834,000 4,432,000 4,027,000 3,485,000 2,886,000 2,747,000 2,866,000 3,460,000 2,953,000 3,150,000 3,180,000 3,600,000 3,215,000 3,243,000 2,468,000 2,993,000 2,767,000 1,833,000 2,053,000 
        total current liabilities
      22,975,000 23,632,000 23,146,000 18,548,000 25,391,000 16,962,000 18,698,000 14,069,000 19,246,000 17,491,000 16,002,000 14,564,000 18,712,000 15,537,000 14,687,000 12,416,000 10,937,000 11,188,000 11,858,000 10,605,000 10,743,000 11,588,000 11,072,000 9,224,000 8,565,000 9,459,000 11,310,000 9,442,000 9,877,000 7,963,000 11,845,000 8,659,000 7,696,000 9,359,000 7,846,000 10,157,000 9,119,000 9,108,000 7,492,000 6,221,000 7,018,000 8,742,000 7,846,000 5,783,000 22,620,000 13,906,000 12,805,000 12,855,000 14,921,000 15,119,000 15,248,000 16,353,000 15,776,000 15,645,000 15,478,000 15,213,000 15,532,000 15,711,000 15,178,000 15,925,000 15,722,000 16,150,000 15,069,000 14,188,000 14,515,000 16,223,000 18,231,000 20,678,000 16,331,000 16,465,000 16,889,000 15,687,000 15,680,000 18,739,000 18,267,000 15,885,000 15,526,000 11,455,000 10,022,000 9,558,000 9,896,000  9,107,000 7,690,000 8,755,000 
        deferred tax liabilities
      26,429,000 22,999,000 23,414,000 21,370,000 23,088,000 23,659,000 23,834,000 24,258,000 24,421,000 24,659,000 25,263,000 25,129,000 25,421,000 25,582,000 25,239,000 24,275,000 23,493,000 23,055,000 23,570,000 23,300,000 22,271,000 21,531,000 21,587,000 19,692,000 18,198,000 17,218,000 16,354,000 14,974,000 13,601,000 12,365,000 13,468,000 13,504,000 12,835,000 12,374,000 18,784,000 18,998,000 19,285,000 19,832,000 19,495,000 19,280,000 19,242,000 19,184,000 19,491,000 19,616,000 19,331,000 18,209,000 18,126,000 17,967,000 17,180,000 16,572,000 16,011,000 14,441,000 13,574,000 13,080,000 12,455,000 10,347,000 9,676,000 8,933,000 7,984,000 7,442,000 6,672,000 6,026,000 5,256,000 4,909,000 4,138,000 3,688,000 5,242,000 4,752,000 3,723,000 3,280,000 2,643,000 2,188,000  1,481,000 1,407,000 602,000          
        operating lease liabilities, excluding current portion
      2,008,000 2,370,000 2,674,000 2,890,000 3,226,000 3,437,000 3,633,000 3,343,000 3,601,000 3,919,000 3,740,000 4,015,000 4,303,000 4,129,000 3,105,000 2,420,000 2,572,000 2,311,000 2,116,000 813,000 858,000 1,030,000 1,109,000 1,352,000 1,560,000 1,866,000 2,144,000 2,547,000 2,644,000                                                         
        other liabilities
      1,266,000 1,283,000 1,301,000 1,323,000 1,343,000 1,364,000 1,380,000 1,396,000 1,412,000 1,429,000 1,418,000 1,413,000 1,427,000 1,436,000 1,447,000 1,452,000 1,439,000 1,436,000 1,789,000 1,781,000 1,768,000 1,757,000 1,395,000 1,383,000 1,377,000 1,362,000 1,356,000 1,369,000 1,372,000 1,376,000 1,409,000 1,432,000 1,449,000 1,461,000 1,496,000 1,511,000 1,476,000 1,580,000 1,856,000 1,889,000 1,914,000 1,946,000 1,151,000 1,181,000 1,539,000 1,529,000 1,660,000 1,708,000 2,438,000 2,615,000 2,909,000 3,690,000 3,871,000 3,999,000 4,304,000 3,747,000 3,478,000 3,894,000 4,807,000 4,360,000 3,549,000 3,247,000 3,509,000 3,164,000 5,031,000 5,417,000 2,921,000 2,656,000 4,584,000 2,740,000 1,590,000 1,595,000 3,374,000 1,814,000 1,928,000 1,673,000 1,664,000 1,681,000 949,000 1,423,000 1,332,000 1,057,000 795,000 1,272,000 899,000 
        total liabilities
      52,678,000 50,284,000 50,535,000 44,131,000 53,048,000 45,422,000 47,545,000 43,066,000 48,680,000 47,498,000 46,423,000 45,121,000 49,863,000 46,684,000 44,478,000 40,563,000 38,441,000 37,990,000 39,333,000 36,499,000 35,640,000 35,906,000 35,163,000 31,651,000 29,700,000 29,905,000 31,164,000 28,332,000 27,494,000 21,704,000 26,722,000 23,595,000 21,980,000 23,194,000 28,126,000 30,666,000 29,880,000 30,520,000 28,843,000 27,390,000 28,174,000 29,872,000 28,488,000 26,580,000 43,490,000 46,561,000 46,758,000 47,947,000 52,456,000 53,473,000 54,585,000 57,401,000 57,388,000 58,141,000 60,154,000 58,473,000 59,102,000 60,204,000 60,885,000 61,894,000 61,359,000 62,089,000 61,751,000 61,428,000 67,100,000 71,682,000 73,101,000 77,689,000 77,949,000 76,522,000 78,637,000 82,481,000 85,177,000 81,675,000 79,945,000 73,963,000 69,476,000 64,803,000 48,048,000 48,194,000 51,992,000  50,582,000 52,265,000 57,540,000 
        stockholders’ equity
                                                                                           
        common stock
      2,976,000 2,975,000 2,970,000 2,970,000 2,969,000 2,968,000 2,963,000 2,963,000 674,000 674,000 672,000 672,000 672,000 671,000 669,000 669,000 669,000 669,000 667,000 667,000 667,000 666,000 664,000 664,000 664,000 663,000 662,000 662,000 661,000 661,000 660,000 660,000 659,000 659,000 657,000 657,000 657,000 657,000 656,000 656,000 655,000 655,000 654,000 653,000 653,000 651,000 650,000 650,000 649,000 649,000 649,000 647,000 647,000 647,000 643,000 643,000 643,000 642,000 641,000 641,000 641,000 640,000 639,000 639,000 635,000 635,000 634,000 632,000 632,000 632,000 631,000 630,000 623,000 621,000 621,000 615,000 615,000 601,000 597,000 593,000 588,000  584,000 584,000 582,000 
        additional paid-in capital
      50,745,000 48,839,000 46,928,000 45,014,000 43,044,000 40,549,000 39,251,000 38,049,000 39,191,000 37,820,000 37,035,000 36,248,000 35,452,000 34,528,000 33,826,000 33,185,000 32,425,000 31,774,000 31,217,000 30,657,000 30,003,000 29,457,000 28,888,000 28,386,000 27,923,000 27,464,000 27,045,000 26,632,000 26,176,000 25,867,000 25,523,000 25,092,000 24,696,000 24,307,000 23,975,000 23,557,000 23,120,000 22,831,000 22,572,000 22,280,000 22,018,000 21,642,000 21,353,000 20,993,000 20,686,000 20,141,000 19,843,000 19,552,000 19,057,000 18,820,000 18,583,000 18,094,000 17,813,000 17,532,000 16,976,000 16,766,000 16,558,000 16,354,000 16,116,000 15,940,000 15,732,000 15,619,000 15,392,000 15,251,000 14,955,000 14,853,000 14,671,000 14,496,000 14,322,000 14,200,000 13,988,000 13,899,000 13,658,000 13,510,000 13,265,000 13,165,000 12,957,000 12,401,000 12,259,000 10,770,000 10,660,000 10,516,000 10,516,000 10,512,000 10,458,000 
        retained earnings
      671,887,000 643,025,000 614,193,000 577,129,000 548,016,000 515,622,000 490,061,000 458,138,000 433,512,000 412,499,000 396,638,000 377,044,000 358,471,000 342,504,000 332,841,000 318,250,000 309,146,000 301,611,000 294,903,000 284,501,000 274,312,000 268,186,000 261,834,000 253,411,000 248,211,000 243,566,000 269,358,000 260,212,000 254,939,000 250,568,000 247,093,000 243,294,000 237,412,000 233,905,000 223,076,000 218,162,000 213,637,000 209,770,000 206,545,000 201,160,000 198,168,000 194,798,000 193,211,000 188,234,000 186,375,000 181,677,000 176,949,000 171,928,000 165,504,000 160,715,000 156,090,000 149,541,000 145,594,000 141,534,000 132,395,000 125,333,000 119,537,000 114,724,000 111,555,000 107,008,000 101,346,000 96,684,000 93,651,000 89,156,000 85,750,000 83,014,000 81,956,000 77,481,000 71,424,000 68,581,000 66,543,000 63,361,000 60,194,000 58,135,000 55,980,000 52,074,000 47,731,000 45,434,000 43,833,000 41,890,000 38,981,000 37,486,000 36,169,000 34,439,000 31,157,000 
        less treasury stock, at cost
      -64,449,000  -61,822,000 -61,822,000 -61,822,000  -58,061,000 -58,061,000 -58,061,000  -56,713,000 -56,713,000 -56,713,000  -55,934,000 -55,934,000 -55,934,000  -55,212,000 -55,212,000 -55,212,000  -54,842,000 -54,842,000 -54,624,000 -54,560,000 -54,357,000 -54,357,000 -54,168,000  -53,956,000 -53,956,000 -53,766,000  -53,589,000 -53,589,000 -53,473,000  -53,286,000 -53,286,000 -53,201,000                -497,000  -370,000 -370,000 -331,000  -210,000 -210,000 -167,000  -121,000 -121,000 -82,000  -37,000               
        total stockholders’ equity
      661,159,000 630,760,000 602,269,000 563,291,000 532,207,000 497,741,000 474,214,000 441,089,000 415,316,000 393,104,000 377,632,000 357,251,000 337,882,000 321,088,000 311,402,000 296,170,000 286,306,000 278,206,000 271,575,000 260,613,000 249,770,000 243,192,000 236,544,000 227,619,000 222,167,000 217,132,000 242,669,000 233,141,000 227,575,000 222,967,000 219,293,000 215,087,000 209,053,000 205,252,000 194,233,000 188,843,000 183,749,000 179,639,000 176,487,000 170,810,000 167,640,000 166,627,000 164,995,000 159,657,000 156,660,000 151,434,000 146,262,000 140,900,000 133,561,000 128,393,000 123,318,000 116,089,000 111,758,000 107,384,000 138,275,000 139,317,000 133,516,000 128,294,000 124,300,000 119,896,000 114,505,000 109,981,000 106,518,000 102,136,000 97,540,000 94,447,000 95,303,000 90,923,000 82,811,000 81,705,000 80,917,000 78,993,000 74,517,000 72,493,000 70,038,000 67,587,000 62,229,000 58,221,000 56,924,000 53,080,000 50,456,000  47,032,000 45,298,000 41,960,000 
        total liabilities and stockholders’ equity
      713,837,000 681,044,000 652,804,000 607,422,000 585,255,000 543,163,000 521,759,000 484,155,000 463,996,000 440,602,000 424,055,000 402,372,000 387,745,000 367,772,000 355,880,000 336,733,000 324,747,000 316,196,000 310,908,000 297,112,000 285,410,000 279,098,000 271,707,000 259,270,000 251,867,000 247,037,000 273,833,000 261,473,000 255,069,000 244,671,000 246,015,000 238,682,000 231,033,000 228,446,000 222,359,000 219,509,000 213,629,000 210,159,000 205,330,000 198,200,000 195,814,000 196,499,000 193,483,000 186,237,000 200,150,000 197,995,000 193,020,000 188,847,000 186,017,000 181,866,000 177,903,000 173,490,000 169,146,000 165,525,000 198,429,000 197,790,000 192,618,000 188,498,000 185,185,000 181,790,000 175,864,000 172,070,000 168,269,000 163,564,000 164,640,000 166,129,000 168,404,000 168,612,000 160,760,000 158,227,000 159,554,000 161,474,000 159,694,000 154,168,000 149,983,000 141,550,000 131,705,000 123,024,000 104,972,000 101,274,000 102,448,000  97,614,000 97,563,000 99,500,000 
        property, plant and equipment
           493,246,000 483,108,000 477,341,000 474,280,000 469,598,000 456,530,000 454,550,000 445,660,000 441,597,000 434,238,000 429,006,000 424,087,000 413,561,000 407,274,000 402,012,000 392,631,000 388,200,000 387,577,000 378,988,000 375,363,000 370,355,000 366,446,000 358,707,000 353,580,000 348,472,000 330,196,000 317,902,000 307,265,000 300,236,000 297,813,000 292,553,000 287,890,000 285,594,000 281,391,000 277,463,000 274,427,000 271,686,000 268,505,000 266,815,000 265,022,000 256,298,000 253,423,000 251,542,000 247,771,000 246,444,000 111,893,000 116,383,000 118,735,000 119,698,000 122,385,000 122,641,000 123,905,000 126,237,000 127,035,000 128,542,000 129,319,000 130,900,000 131,071,000 133,301,000 135,207,000 136,564,000 136,367,000 135,149,000 133,053,000 132,151,000 132,734,000 132,815,000 132,532,000 129,894,000 123,939,000 116,501,000 105,853,000 99,301,000 87,204,000 84,599,000 84,592,000  80,155,000 80,230,000 77,267,000 
        mineral reserves and land
       67,817,000    60,952,000    59,307,000    48,586,000    40,534,000    40,065,000    36,423,000    33,637,000    24,254,000    23,687,000    20,196,000                16,727,000    16,511,000    15,040,000    10,595,000    10,523,000    10,367,000        
        proved natural gas properties, successful-efforts method
       15,934,000    15,934,000    15,934,000    15,934,000    15,934,000    15,934,000    17,484,000    18,414,000    18,414,000    18,412,000    18,398,000                17,295,000    15,080,000    13,794,000    7,834,000                
        buildings and building and leasehold improvements
       13,527,000    13,246,000    10,732,000    9,588,000    7,856,000    7,808,000    7,251,000    5,814,000    5,643,000    5,611,000    5,523,000                3,392,000    3,391,000    3,322,000    3,170,000    2,977,000            
        machinery and equipment
       447,545,000    393,312,000    374,000,000    359,123,000    342,120,000    318,503,000    304,379,000    286,173,000    248,294,000    232,912,000    222,812,000                189,273,000    187,410,000    184,526,000    189,819,000    180,196,000    144,994,000    130,565,000   119,700,000 
        furniture and fixtures
       1,422,000    1,409,000    1,312,000    1,312,000    1,173,000    1,088,000    981,000    981,000    958,000    961,000    961,000                851,000    884,000    826,000    1,227,000    1,194,000    1,192,000    1,100,000   971,000 
        automotive equipment
       8,367,000    8,393,000    8,313,000    7,054,000    5,944,000    4,802,000    3,837,000    3,453,000    2,673,000    4,011,000    3,796,000                1,661,000    1,579,000    1,557,000    1,456,000    1,196,000    881,000    662,000   484,000 
        commitments and contingencies
                                                                                           
        preferred stock, 5.00 par value; authorized 500,000 shares; none issued
                                                                                           
        less treasury stock, 1,074,460 and 1,051,931 shares at december 31, 2025 and 2024, respectively, at cost
       -64,079,000                                                                                    
        preferred stock, 5.00 par value; authorized 500,000 shares; none issued or outstanding
                                                                                           
        less treasury stock, 1,051,931 and 1,026,651 shares at december 31, 2024 and 2023, respectively, at cost
           -61,398,000                                                                                
        less treasury stock, 1,026,651 and 1,021,087 shares at december 31, 2023 and 2022, respectively, at cost
               -57,889,000                                                                            
        less treasury stock, 1,021,087 and 1,015,457 shares at december 31, 2022 and 2021, respectively, at cost
                   -56,615,000                                                                        
        accumulated other comprehensive income
                                   -13,000 -27,000  52,000 86,000 114,000 56,000                                  -1,641,000 -208,000 1,140,000 42,000 227,000 172,000 1,733,000 926,000  235,000  227,000     
        less treasury stock, 1,015,457 and 1,009,796 shares at december 31, 2021 and 2020, respectively, at cost
                       -55,848,000                                                                    
        accumulated other comprehensive loss
                                -39,000  -33,000        -192,000 -223,000                   -2,725,000 -3,009,000 -3,642,000 -3,323,000 -2,883,000 -2,718,000 -2,954,000 -2,700,000 -3,633,000 -3,911,000 -1,837,000 -1,565,000 -3,485,000         -215,000  -173,000  -363,000 -237,000 -237,000 -237,000 
        less treasury stock, 1,009,796 and 1,004,174 shares at december 31, 2020 and 2019, respectively, at cost
                           -55,117,000                                                                
        less treasury stock; 998,699 and 993,314 shares at december 31, 2018 and 2017, respectively, at cost
                                   -54,116,000                                                        
        debt
                                                                                           
        less treasury stock, 993,314 and 989,300 shares at december 31, 2017 and 2016, respectively, at cost
                                       -53,705,000                                                    
        less treasury stock, at cost 989,300 and 935,368 shares at december 31, 2016 and 2015, respectively
                                           -53,396,000                                                
        liabilites and stockholders’ equity
                                                                                           
        current assets:
                                                                                           
        current liabilities:
                                                                                           
        stockholders’ equity:
                                                                                           
        property, plant and equipment:
                                                                                           
        current installments of debt
                                                  15,417,000 5,000,000 5,000,000 5,000,000 5,000,000 6,250,000 6,250,000 6,250,000 6,250,000 6,250,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 4,583,000 4,167,000 3,646,000 3,333,000 2,500,000 2,500,000 2,500,000 2,500,000 2,500,000 3,333,000 3,333,000 
        debt, excluding current installments
                                                   12,917,000 14,167,000 15,417,000 17,917,000 19,167,000 20,417,000 22,917,000 24,167,000 25,417,000 27,917,000 29,166,000 30,416,000 31,666,000 32,916,000 34,167,000 35,416,000 36,666,000 37,917,000 39,167,000 43,416,000 46,354,000 46,707,000 49,603,000 53,311,000 54,037,000 57,515,000 63,011,000 66,123,000 59,641,000 58,343,000 55,803,000 52,286,000 51,667,000 37,077,000 37,213,000 40,764,000 41,390,000 40,680,000 43,303,000 47,886,000 
        less treasury stock, at cost, 935,368 and 928,469 shares at december 31, 2015 and 2014, respectively
                                               -50,468,000                                            
        property, plant and equipment, at cost
                                                        243,953,000 242,187,000 240,839,000 238,360,000 234,421,000 231,344,000 230,116,000  226,452,000 228,957,000 226,472,000  221,911,000 221,436,000 220,547,000  215,487,000 222,687,000 217,564,000  211,453,000 208,340,000       146,410,000    134,217,000 132,992,000  
        less treasury stock at cost, 11,024 and 6,548 shares at december 31, 2010 and 2009, respectively
                                                               -417,000                            
        less treasury stock at cost, 6,548 and 4,470 shares at december 31, 2009 and 2008, respectively
                                                                   -244,000                        
        less accumulated depreciation
                                                                    -90,840,000 -88,135,000 -85,340,000  -79,120,000 -87,538,000 -84,511,000  -78,719,000 -75,525,000 -72,659,000 -69,967,000 -67,566,000 -65,195,000 -62,725,000 -60,660,000 -59,206,000 -58,081,000 -56,506,000 -54,581,000 -54,062,000 -52,762,000 -49,371,000 
        prepaid expenses and other assets
                                                                     1,232,000 1,180,000 1,336,000 502,000 671,000 902,000 1,155,000 733,000 548,000 802,000 913,000   1,408,000 1,617,000    996,000   721,000 
        property, plant and equipment: - sum
                                                                       219,065,000                    
        less treasury stock at cost, 4,470 and 1,982 shares at december 31, 2008 and 2007, respectively
                                                                       -144,000                    
        less treasury stock at cost, 1,982 and 0 shares at december 31, 2007 and 2006, respectively
                                                                           -67,000                
        less treasury stock at cost
                                                                             -37,000              
        property, plant and equipment, at cost:
                                                                              205,191,000  191,505,000 181,696,000 168,578,000   142,680,000 141,098,000     
        natural gas properties
                                                                               3,775,000            
        deferred tax assets
                                                                                   290,000    108,000 732,000 1,131,000 1,899,000 
        buildings and building improvements
                                                                                   2,527,000        
        land
                                                                                       4,071,000   3,654,000 
        building and building improvements
                                                                                       1,724,000   1,829,000 
        accounts payable — trade
                                                                                       4,176,000   3,369,000 
        accounts payable-trade
                                                                                        3,840,000   
      Cashflow Statements:
      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 2015-09-30 2015-06-30 2015-03-31 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 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 2005-03-31 
                                                                                     
          operating activities:
                                                                                     
          net income
        30,582,000 30,549,000 38,782,000 30,831,000 34,113,000 26,990,000 33,353,000 26,057,000 22,439,000 17,000,000 20,733,000 19,712,000 17,104,000 10,797,000 15,726,000 10,238,000 8,668,000 7,613,000 11,308,000 11,093,000 7,031,000 7,254,000 9,324,000 6,101,000 5,544,000 4,993,000 9,902,000 6,033,000 5,128,000 4,231,000 4,554,000 6,638,000 4,262,000 11,583,000 5,667,000 5,278,000 4,620,000 3,920,000 6,081,000 3,687,000 4,066,000 10,600,000 4,924,000 2,365,000 15,636,000 10,210,000 4,492,000 12,171,000 4,625,000 2,757,000 3,947,000 4,060,000 4,624,000 7,062,000 5,796,000 4,813,000 3,169,000 4,546,000 5,663,000 4,662,000 3,033,000 4,495,000 3,406,000 2,736,000 1,058,000 4,475,000 6,057,000 2,843,000 2,038,000 3,182,000 3,167,000 2,059,000 2,155,000 3,906,000 4,343,000 2,297,000 1,495,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                     
          depreciation, depletion, and amortization
        6,598,000 6,727,000 6,160,000 6,195,000 6,137,000                                                                         
          amortization of deferred financing costs
        6,000 12,000 6,000 25,000 2,000 8,000 5,000 2,000 2,000 2,000 4,000 2,000 3,000 2,000 2,000 1,000 2,000 4,000 -9,000 8,000 7,000 8,000 4,000 4,000 3,000 4,000 3,000 5,000 2,000 4,000 25,000 23,000 11,000 34,000 23,000 11,000  11,000 12,000 11,000 12,000 11,000 12,000 11,000 11,000                      
          deferred income taxes
        3,430,000 -415,000 2,044,000 -1,718,000 -571,000 -175,000 -424,000 -163,000 -238,000 -604,000 134,000 -292,000 -161,000 343,000 964,000 782,000 438,000 -525,000 270,000 1,029,000 750,000 -56,000 1,885,000 1,494,000 990,000 849,000 1,380,000 1,373,000 1,246,000 -1,099,000 -38,000 686,000 471,000 -6,369,000 -391,000 -287,000 -565,000 337,000 215,000 38,000 58,000   7,000 165,000 165,000 85,000 1,297,000 680,000 9,000 867,000 494,000 500,000 2,148,000 760,000 581,000 572,000 757,000 1,021,000 740,000 114,000 346,000 772,000 450,000 398,000 490,000 1,029,000 443,000 637,000 455,000 397,000 310,000 74,000 805,000 703,000 189,000 108,000 
          loss on disposition of property, plant, and equipment
        75,000 294,000 184,000 106,000                                                                         
          stock-based compensation
        1,779,000 1,916,000 1,914,000 1,971,000 2,336,000 1,303,000 1,203,000 1,146,000 1,241,000 786,000 788,000 796,000 812,000 704,000 641,000 640,000 651,000 558,000 560,000 571,000 547,000 571,000 502,000 463,000 379,000 420,000 413,000 382,000 309,000 345,000 431,000 397,000 316,000 332,000 418,000 366,000 289,000 258,000 293,000 262,000 223,000 908,000 575,000 268,000 822,000 524,000 233,000 684,000 229,000 231,000 281,000 279,000 262,000 209,000 209,000 205,000 239,000 176,000 208,000 114,000 284,000 47,000 142,000 103,000 184,000 147,000 174,000 122,000 197,000 246,000 46,000 106,000  48,000 172,000 45,000  
          changes in operating assets and liabilities:
                                                                                     
          trade receivables
        -10,178,000 11,363,000 -4,904,000 1,380,000 -11,790,000 8,923,000 -6,621,000 -4,129,000 -4,103,000 6,009,000 -3,326,000 -2,379,000 -4,764,000 5,967,000 -2,436,000 -4,291,000 -5,678,000 2,527,000 -1,780,000 -3,505,000 -978,000 1,867,000 -2,514,000 1,956,000 -200,000 232,000 -234,000 -236,000 -3,108,000 -1,229,000 2,550,000 -1,849,000 -2,601,000 1,769,000 645,000 1,138,000 -3,244,000 2,604,000 -1,980,000 -568,000 -948,000  717,000 1,416,000            -4,563,000 125,000 4,796,000 -785,000 -4,610,000 738,000 1,732,000 -2,856,000 1,513,000 5,125,000 849,000 -5,191,000 -1,362,000 1,380,000 1,163,000 343,000 -3,094,000 2,449,000 -1,240,000 747,000 -3,598,000 -840,000 
          inventories
        301,000 -2,227,000 -3,086,000 2,265,000 -174,000 97,000 -483,000 -1,576,000 -1,411,000 -535,000 -1,428,000 -304,000 -2,467,000 -1,927,000 -933,000 -179,000 -1,255,000 -356,000 -137,000 786,000 -199,000 -148,000 -208,000 -888,000 -146,000 -151,000 -908,000 492,000 25,000 342,000 -931,000 342,000 947,000 -665,000 -1,185,000 121,000 616,000 280,000 777,000 282,000 956,000    829,000 2,149,000 1,696,000 577,000  438,000    189,000 609,000 299,000 150,000 -1,423,000 -286,000 418,000 647,000 873,000 1,269,000 48,000 -468,000 -355,000 -826,000 -749,000 29,000 -424,000 -769,000 -147,000 -712,000 -814,000 -205,000 860,000 -59,000 
          prepaid expenses and other current assets
        969,000 -2,556,000 754,000 522,000 1,012,000 -2,334,000 717,000 535,000 639,000 -2,325,000 574,000 2,000 609,000 -1,273,000 35,000 55,000 992,000 -1,843,000 399,000 628,000 -183,000 -395,000 -607,000 647,000 249,000 -479,000 -309,000 125,000 216,000 707,000 232,000 21,000 417,000 -1,269,000 -255,000 -113,000 43,000 -392,000 151,000 199,000 350,000 1,623,000 1,197,000 793,000 213,000 446,000     147,000 251,000 37,000 -392,000 355,000 153,000 -964,000 140,000 564,000 504,000 -654,000 417,000 -52,000 156,000  169,000 231,000 253,000  -185,000    -125,000    
          other assets
        -1,562,000 238,000 -7,000 7,000 164,000 -114,000 1,581,000 -1,579,000 15,000 17,000 -115,000 -38,000 -6,000 -2,000 3,000 1,000 6,000 45,000 46,000 -148,000 16,000 -162,000 125,000 26,000 14,000 32,000 35,000 19,000 31,000  25,000 73,000 20,000 3,000   1,000 -1,000 2,000 2,000 1,000    1,000 1,000 1,000 3,000  1,000 -2,000 5,000   2,000 -1,000 1,000 -120,000 2,000 5,000 -125,000 127,000 -39,000 21,000 -107,000 -1,000 -3,000 -96,000 -12,000 23,000 34,000 -82,000 -513,000 28,000 759,000 -144,000 
          accounts payable and accrued expenses
        82,000 3,000 4,006,000 -7,585,000 8,113,000 -2,224,000 3,644,000 -5,073,000 2,643,000 717,000 1,099,000 -3,888,000 3,738,000 250,000 2,008,000 1,431,000 -988,000 -1,367,000 884,000 101,000 -719,000 283,000 1,517,000 758,000 21,000 -846,000 1,133,000 447,000 -899,000 -1,128,000 2,263,000 1,008,000 -1,705,000 833,000 -1,696,000 -351,000 84,000 873,000 1,271,000 -797,000 -815,000 208,000      1,515,000 -412,000 579,000    9,000 -390,000 482,000 -236,000 -479,000 -18,000 930,000 -623,000 1,236,000 206,000 -2,125,000 -1,257,000 -929,000 3,398,000 -1,613,000 517,000 750,000 10,000 -412,000 -1,289,000 1,724,000 -81,000 1,920,000 1,530,000 
          other liabilities
        -20,000 -34,000 -28,000 -21,000 -18,000 -24,000 -35,000 -24,000 -21,000 12,000 11,000 12,000 19,000 26,000 45,000 25,000 -325,000 25,000 42,000 11,000 366,000 -92,000 14,000 13,000 67,000 -42,000 -69,000 15,000 106,000 -46,000 -89,000 -56,000 -34,000 -269,000 276,000 -49,000 -529,000 14,000 -48,000 -52,000 585,000 630,000 141,000 298,000 200,000 30,000 120,000 -202,000 214,000    333,000 22,000 31,000 65,000 -54,000 120,000 -179,000 656,000 93,000 -935,000 -109,000 -1,529,000 -7,000 -8,000 -1,000 -140,000 -1,000 11,000 -234,000 -108,000 255,000 1,000 -8,000 -73,000 
          net cash from operating activities
        32,062,000 45,564,000 45,941,000 34,031,000 39,434,000 38,606,000 39,050,000 21,197,000 27,167,000 27,577,000 24,409,000 19,629,000 20,644,000 20,445,000 21,565,000 14,294,000 8,059,000 11,562,000 16,755,000 15,750,000 11,622,000 16,668,000 14,778,000 15,621,000 11,508,000 10,831,000 16,144,000 12,562,000 7,474,000 6,897,000 13,608,000 11,710,000 6,520,000 10,324,000 7,310,000 10,509,000 6,139,000 11,977,000 10,953,000 7,035,000 7,882,000   7,523,000 23,286,000 15,938,000 3,797,000  7,110,000 5,390,000 9,023,000 8,745,000 7,119,000 12,635,000 11,046,000 5,421,000 6,898,000 11,713,000 9,720,000 5,853,000 7,439,000 12,419,000 5,503,000 6,213,000 6,083,000 8,339,000 8,142,000 3,192,000 7,645,000 8,424,000 6,709,000 1,695,000      
          capital expenditures
        -18,340,000 -19,909,000 -14,663,000 -13,274,000 -14,852,000 -11,043,000 -5,151,000 -4,396,000 -6,824,000 -13,709,000 -5,109,000 -9,981,000 -5,451,000 -8,695,000 -6,635,000 -5,968,000 -5,517,000 -6,183,000 -5,955,000 -13,233,000 -4,543,000 -3,512,000 -3,022,000 -4,493,000 -6,106,000 -6,677,000 -8,063,000 -6,676,000 -5,684,000 -22,075,000 -12,309,000 -11,758,000 -7,620,000 -6,833,000 -5,919,000 -4,377,000 -4,208,000 -5,434,000 -4,330,000 -3,965,000 -3,935,000    -1,741,000 -2,199,000 -2,038,000 -2,319,000 -2,772,000 -1,503,000 -1,383,000 -2,020,000 -1,747,000 -2,524,000 -6,179,000 -4,375,000 -2,682,000 -3,745,000 -2,770,000 -3,463,000 -8,249,000      
          free cash flows
        13,722,000 25,655,000 31,278,000 20,757,000 24,582,000 27,563,000 33,899,000 16,801,000 20,343,000 13,868,000 19,300,000 9,648,000 15,193,000 11,750,000 14,930,000 8,326,000 2,542,000 5,379,000 10,800,000 2,517,000 7,079,000 13,156,000 11,756,000 11,128,000 5,402,000 4,154,000 8,081,000 5,886,000 1,790,000 -15,178,000 1,299,000 -48,000 -1,100,000 3,491,000 1,391,000 6,132,000 1,931,000 6,543,000 6,623,000 3,070,000 3,947,000   7,523,000 23,286,000 15,938,000 3,797,000  7,110,000 5,390,000 9,023,000 8,745,000 7,119,000 12,635,000 11,046,000 3,680,000 4,699,000 9,675,000 7,401,000 3,081,000 5,936,000 11,036,000 3,483,000 4,466,000 3,559,000 2,160,000 3,767,000 510,000 3,900,000 5,654,000 3,246,000 -6,554,000      
          investing activities:
                                                                                     
          purchase of property, plant, and equipment
        -18,340,000 -19,909,000 -14,663,000 -13,274,000 -14,852,000                                                                         
          proceeds from sale of property, plant, and equipment
        281,000 -71,000 44,000 237,000 4,000                                                                         
          net cash from investing activities
        -18,059,000 -19,980,000 -14,619,000 -13,037,000 -14,848,000 -10,831,000 -5,099,000 -4,260,000 -6,668,000 -13,603,000 -3,163,000 -9,867,000 -5,331,000 -7,905,000 -6,352,000 -5,563,000 -11,331,000 -6,069,000 -5,794,000 -13,233,000 -4,533,000 -3,239,000 -11,402,000 -4,463,000 -6,090,000 -6,314,000 -8,329,000 -6,357,000 -5,542,000 -21,930,000 -12,032,000 -11,683,000 -7,512,000 -6,700,000 -5,903,000 -3,934,000 -4,208,000 -5,402,000 -4,274,000 -3,923,000 -3,907,000               -1,728,000 -2,157,000 -2,032,000 -2,296,000 -2,769,000 -1,390,000 -1,373,000 -1,993,000 -1,650,000 -5,050,000 -6,179,000 -4,368,000 -2,681,000 -3,708,000 -2,751,000 -3,463,000 -8,249,000 -7,384,000 -9,715,000 -13,208,000 -7,084,000 -4,325,000 
          financing activities:
                                                                                     
          cash dividends paid
        -1,720,000 -1,717,000 -1,718,000 -1,718,000 -1,719,000 -1,429,000 -1,430,000 -1,431,000 -1,426,000 -1,139,000 -1,139,000 -1,139,000 -1,137,000 -1,134,000 -1,135,000 -1,134,000 -1,133,000 -905,000 -906,000 -904,000 -905,000 -902,000 -901,000 -901,000 -899,000 -30,785,000 -756,000 -760,000 -757,000 -755,000 -756,000 -756,000 -755,000 -754,000 -753,000 -753,000 -753,000 -695,000 -696,000 -695,000 -696,000                                     
          proceeds from exercise of stock options
        128,000 160,000 130,000 113,000   1,000   81,000   73,000 1,000   2,000 -1,000 154,000       21,000   2,000 73,000         96,000        -99,000    58,000 36,000 36,000 147,000 
          purchase of treasury shares
        -370,000 -2,257,000 -424,000 -3,337,000 -172,000 -1,176,000 -98,000 -681,000 -86,000 -636,000 -95,000 -275,000 -218,000 -64,000 -203,000 -189,000 -52,000 -160,000 -190,000 -61,000 -116,000 -116,000 -77,000 -110,000 -85,000 -2,733,000               -80,000 -47,000 -39,000 -87,000 -34,000 -43,000 -23,000 -23,000 -39,000 -15,000 -30,000        
          net cash from financing activities
        -1,962,000 -3,974,000 -1,718,000 -1,718,000 -1,983,000 -4,766,000 -1,430,000 -1,431,000 -1,468,000 -2,315,000 -1,139,000 -1,139,000 -1,122,000 -1,815,000 -1,135,000 -1,014,000 -1,219,000 -1,540,000 -906,000 -821,000 -1,000,000 -1,177,000 -901,000 -1,119,000 -882,000 -30,988,000 -756,000 -874,000 -809,000 -915,000 -756,000 -946,000 -743,000 -869,000 -753,000 -797,000 -830,000 -803,000 -697,000 -780,000 -3,275,000               -1,330,000 -1,297,000 -1,250,000 -1,289,000 -1,337,000 -1,288,000 -1,154,000 -4,135,000 -2,961,000 -425,000 -2,865,000 -3,747,000 -684,000 -3,493,000 -5,594,000 -2,974,000 6,553,000 1,942,000 3,016,000 4,073,000 1,457,000 -486,000 
          net increase in cash and cash equivalents
        12,041,000 21,610,000 29,604,000 19,276,000 22,603,000 23,009,000 32,521,000 15,506,000 19,031,000 11,659,000 20,107,000 8,623,000 14,191,000 10,725,000 14,078,000 7,717,000 -4,491,000 3,953,000 10,055,000 1,696,000 6,089,000 12,252,000 2,475,000 10,039,000 4,536,000 -26,471,000 7,059,000 5,331,000 1,123,000 -15,948,000 820,000 -919,000 -1,735,000 2,755,000 654,000 5,778,000 1,101,000 5,772,000 5,982,000 2,332,000 700,000   2,137,000 8,797,000 6,540,000  13,614,000 3,385,000 3,701,000    114,000 7,674,000 2,363,000 3,444,000 8,431,000 6,135,000 1,747,000 4,761,000 9,892,000 -625,000 1,602,000 608,000 -705,000   444,000 79,000   -189,000     
          cash and cash equivalents at beginning of period
        371,124,000 278,031,000 187,964,000 133,384,000 105,355,000 83,562,000 54,260,000 67,218,000 85,000,000 74,712,000 59,926,000 58,332,000 58,332,000 58,332,000 49,475,000 49,475,000 49,475,000 29,787,000 29,787,000 53,372,000 36,223,000  16,466,000  836,000  1,079,000  285,000  1,312,000 227,000 
          cash and cash equivalents at end of period
        383,165,000 21,610,000 29,604,000 19,276,000 300,634,000 23,009,000 32,521,000 15,506,000 206,995,000 11,659,000 20,107,000 8,623,000 147,575,000 10,725,000 14,078,000 7,717,000 100,864,000 3,953,000 10,055,000 1,696,000 89,651,000 12,252,000 2,475,000 10,039,000 58,796,000 -26,471,000 7,059,000 5,331,000 68,341,000 -15,948,000 820,000 -919,000 83,265,000 2,755,000 654,000 5,778,000 75,813,000 5,772,000 5,982,000 2,332,000 60,626,000 54,519,000 47,774,000 60,469,000 58,272,000 56,015,000 48,487,000 43,401,000 3,385,000 33,488,000 6,050,000 5,017,000 16,286,000 114,000 7,674,000 38,586,000  8,431,000 6,135,000 18,213,000  9,892,000 -625,000 2,438,000  -705,000 27,000 906,000  79,000 272,000 284,000  -130,000 -121,000 725,000 207,000 
          depreciation, depletion and amortization
             6,044,000 6,108,000 5,963,000 6,054,000 6,044,000 5,972,000 5,983,000 5,828,000 5,688,000 5,715,000 5,546,000 5,250,000 5,266,000 5,057,000 5,234,000 5,341,000 5,220,000 4,938,000 4,798,000 4,655,000 4,971,000 4,242,000 4,283,000 4,121,000 4,592,000 4,439,000 4,342,000 4,230,000 3,838,000 4,318,000 4,103,000 4,290,000 4,109,000 4,048,000 3,992,000 3,992,000 11,916,000 7,885,000 3,962,000 11,091,000 7,316,000 3,601,000 11,008,000 3,652,000 3,729,000 3,808,000 3,768,000 3,640,000 3,537,000 3,427,000 3,414,000 3,750,000 3,234,000 3,357,000 3,270,000 3,222,000 3,316,000 3,454,000 3,483,000 3,460,000 3,494,000 3,271,000 3,250,000 3,504,000 3,237,000 3,210,000 2,930,000 2,821,000 2,517,000 2,489,000 2,317,000 1,960,000 
          loss on disposition of property, plant and equipment
                        -52,000   -81,000 3,000 318,000 -95,000 252,000 -13,000 -189,000 531,000 -289,000 386,000 158,000 121,000 134,000 211,000 299,000 50,000 -22,000 50,000              -21,000                           
          purchase of property, plant and equipment
             -11,043,000 -5,151,000 -4,396,000 -6,824,000 -13,709,000 -5,109,000 -9,981,000 -5,451,000 -8,695,000 -6,635,000 -5,968,000 -5,517,000 -6,183,000 -5,955,000 -13,233,000 -4,543,000 -3,512,000 -3,022,000 -4,493,000 -6,106,000 -6,677,000 -8,063,000 -6,676,000 -5,684,000 -22,075,000 -12,309,000 -11,758,000 -7,620,000 -6,833,000 -5,919,000 -4,377,000 -4,208,000 -5,434,000 -4,330,000 -3,965,000 -3,935,000               -1,741,000 -2,199,000 -2,038,000 -2,319,000 -2,772,000 -1,503,000 -1,383,000 -2,020,000 -1,747,000 -2,524,000 -6,179,000 -4,375,000 -2,682,000 -3,745,000 -2,770,000 -3,463,000 -8,249,000 -7,401,000 -9,671,000 -11,608,000 -6,872,000 -4,326,000 
          acquisition of a business, net of cash acquired
                                                                                   
          proceeds from sale of property, plant and equipment
             212,000 52,000 136,000 156,000 106,000 1,946,000 114,000 120,000 790,000 283,000 146,000 75,000 114,000 161,000 10,000 273,000 12,000 30,000 16,000 363,000 -266,000 319,000 142,000 145,000 277,000 75,000 108,000 133,000 16,000   82,000 56,000 42,000 28,000 263,000 199,000 66,000 246,000 211,000 97,000 78,000 9,000 42,000 6,000 38,000 4,000 46,000 70,000 13,000 42,000 6,000 23,000 3,000 113,000 10,000 27,000 97,000 3,000 7,000 1,000 37,000        1,000 
          gain on disposition of property, plant and equipment
              7,000 40,000 -93,000  -38,000 23,000 -70,000                                         92,000                        
          impairment of long-lived assets
                                                                                     
          loss on sale of property, plant and equipment
                                              76,000 -16,000 47,000   30,000 54,000  28,000                               
          acquisition of a business
                        -5,889,000                                                            
          acquisition of assets of a business
                                                                                     
          repayments of term loans
                                                               -1,250,000 -1,250,000 -1,250,000 -1,250,000 -1,250,000 -1,250,000 -1,250,000                
          cash and cash equivalents at beginning of year
                                                                                     
          cash and cash equivalents at end of year
                                                                                     
          net cash provided by operating activities
                                                 22,900,000 13,777,000                                   
          repayment of term loans
                                                                       -1,251,000  -1,250,000 -1,250,000 -1,250,000  -1,250,000 -1,250,000 -1,250,000   -834,000 -833,000 -625,000 
          exercise of stock options
                                                 28,000                                    
          net (decrease) increase in cash and cash equivalents
                                                                                     
          gain on sale of property, plant and equipment
                                                            10,000   -7,000                      
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                                     
          adjustments to reconcile net income to net cash provided by operations:
                                                                                     
          amortization of financing costs
                                                       34,000          10,000 8,000 5,000 7,000 5,000 4,000 -101,000 112,000 6,000 5,000 6,000 5,000 5,000 6,000 6,000 6,000 5,000 6,000 27,000 
          loss on disposal of assets
                                                       53,000                              
          net cash from operations
                                                       24,167,000                          6,569,000 9,014,000 5,040,000 4,791,000 
          (gain) loss on sale of property, plant and equipment
                                                                                     
          changes in operating assets and liabilities, net of the effects of acquisitions of businesses:
                                                                                     
          acquisitions of businesses
                                                                                -44,000    
          repayments of revolving credit facilities
                                                                                     
          tax benefits related to exercise of stock options
                                                                                     
          adjustments to reconcile net income to net cash from operations:
                                                                                     
          gain on disposition of assets
                                                                 9,000 -12,000 -3,000                  
          repayment of revolving credit facilities
                                                                                     
          proceeds from exercise of stock options and warrants
                                                                               43,000      
          (gain) loss on disposition of assets
                                                                     -18,000 -35,000 -7,000              
          repayments of revolving credit facility
                                                                                     
          tax benefit related to exercise of stock options
                                                                         57,000  1,000 28,000 28,000      
          (repayments of) proceeds from revolving credit facilities
                                                                       -1,687,000              
          prepaid expenses
                                                                                    420,000 
          proceeds from term loans
                                                                                     
          loss on disposition of assets
                                                                         1,000 2,000 4,000  8,000 12,000 26,000  44,000  
          (repayments of) proceeds from revolving credit facility
                                                                                     
          proceeds from revolving credit facilities
                                                                           524,000  -4,246,000        
          net decrease in cash and cash equivalents
                                                                           -173,000    -1,000   -121,000 -587,000 -20,000 
          accretion of debt discount
                                                                                     
          accretion of repurchase liability — warrant shares
                                                                                    347,000 
          changes in operating assets and liabilities, net of the effects of acquisition of businesses:
                                                                                     
          (repayments of ) proceeds from revolving credit facilities
                                                                                     
          repayment of subordinated debt
                                                                                     
          cumulative effect of change in accounting principle
                                                                                     
          proceeds from exercise of warrants
                                                                                 489,000  
          prepaid expenses and other assets
                                                                               111,000    209,000  
          acquisition of business
                                                                                   -212,000  
          proceeds from revolving credit facility
                                                                               7,732,000      
          stock based compensation
                                                                                     
          proceeds from (repayments of ) revolving credit facilities
                                                                                     
          proceeds from term loans, net of 270 issuance costs in 2004
                                                                                     
          amortization of debt discount
                                                                                    8,000 
          proceeds from disposition of property, plant and equipment
                                                                                     
          proceeds from draw term loan
                                                                                     
          repayment of term loan
                                                                                     
          total adjustments
                                                                                  4,671,000 2,743,000 3,296,000 
          proceeds from (repayment of) revolving credit facilities
                                                                                  -129,000 1,765,000  
          accretion of repurchase liability – warrant shares
                                                                                     
          loss on sale of assets
                                                                                    12,000 
          changes in operating assets and liabilities, net of acquisition of businesses:
                                                                                     
          payment of common stock dividends
                                                                                     
          proceeds from subordinate debt, net of 550 issuance costs
                                                                                     
          proceeds from term loan, net of 270 issuance costs
                                                                                     
          repayment of revolving credit facility
                                                                                    -8,000 
          accretion of repurchase liability - warrants
                                                                                     
          proceeds from subordinated debt, net of 550 issuance costs
                                                                                     
          supplemental cash flow information:
                                                                                     
          interest paid
                                                                                     
          income taxes paid
                                                                                     
          proceeds from borrowings
                                                                                     
          repayment of debt
                                                                                     
          accretion of repurchase liability — warrants
                                                                                     
          financing costs
                                                                                     
          repayments of debt
                                                                                     
          proceeds from issuance of common stock pursuant to rights offering