7Baggers

AAON, Inc
(NASDAQ:AAON) 

AAON stock logo

AAON, Inc., together with its subsidiaries, engages in engineering, manufacturing, marketing, and selling air conditioning and heating equipment in the United States and Canada. It offers rooftop units, chillers, packaged outdoor mechanical rooms, air handling units, makeup air units, energy recover...

Founded: 1988
Full Time Employees: 2,290
Sector: Industrials
Industry: Building Products & Equipment

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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 
                                                                       
      net sales
    496,936,000 424,217,000 384,238,000 311,567,000 322,054,000 297,718,000 327,252,000 313,566,000 262,099,000 306,638,000 311,970,000 283,957,000 265,953,000 254,598,000 242,605,000 208,814,000 182,771,000 136,282,000 138,571,000 143,876,000 115,788,000 116,700,000 134,772,000 125,596,000 137,483,000 122,574,000 113,500,000 119,437,000 113,822,000 112,340,000 112,937,000 109,588,000 99,082,000 104,160,000 113,668,000 101,326,000 86,078,000 91,668,000 104,568,000 102,319,000 85,422,000 97,229,000 94,360,000 90,275,000 76,768,000 84,728,000 102,917,000 92,310,000 76,367,000 73,376,000 89,690,000 91,241,000 66,833,000 78,008,000 76,816,000 83,333,000 64,957,000 63,402,000 73,829,000 69,076,000 59,913,000 65,826,000 64,886,000 64,531,000 49,309,000 54,228,000 58,492,000 
      yoy
    54.30% 42.49% 17.41% -0.64% 22.87% -2.91% 4.90% 10.43% -1.45% 20.44% 28.59% 35.99% 45.51% 86.82% 75.08% 45.13% 57.85% 16.78% 2.82% 14.55% -15.78% -4.79% 18.74% 5.16% 20.79% 9.11% 0.50% 8.99% 14.88% 7.85% -0.64% 8.15% 15.11% 13.63% 8.70% -0.97% 0.77% -5.72% 10.82% 13.34% 11.27% 14.75% -8.31% -2.20% 0.53% 15.47% 14.75% 1.17% 14.27% -5.94% 16.76% 9.49% 2.89% 23.04% 4.05% 20.64% 8.42% -3.68% 13.78% 7.04% 21.51% 21.39% 10.93%     
      qoq
    17.14% 10.40% 23.32% -3.26% 8.17% -9.02% 4.36% 19.64% -14.52% -1.71% 9.87% 6.77% 4.46% 4.94% 16.18% 14.25% 34.11% -1.65% -3.69% 24.26% -0.78% -13.41% 7.31% -8.65% 12.16% 7.99% -4.97% 4.93% 1.32% -0.53% 3.06% 10.60% -4.88% -8.36% 12.18% 17.71% -6.10% -12.34% 2.20% 19.78% -12.14% 3.04% 4.53% 17.59% -9.39% -17.67% 11.49% 20.88% 4.08% -18.19% -1.70% 36.52% -14.33% 1.55% -7.82% 28.29% 2.45% -14.12% 6.88% 15.29% -8.98% 1.45% 0.55% 30.87% -9.07% -7.29%  
      cost of sales
    371,971,000 314,447,000 277,377,000 228,838,000 235,690,000 220,103,000 213,094,000 200,472,000 169,857,000 194,899,000 195,861,000 189,939,000 188,799,000 176,057,000 177,014,000 161,438,000 136,707,000 109,735,000 102,552,000 101,769,000 82,631,000 82,777,000 93,924,000 87,465,000 94,536,000 86,502,000 86,115,000 89,262,000 88,029,000 84,545,000 80,174,000 82,003,000 83,692,000 73,085,000 78,010,000 69,648,000 61,092,000 65,158,000 71,476,000 69,572,000 59,691,000 67,648,000 64,175,000 63,158,000 54,970,000 59,537,000 69,567,000 64,434,000 54,521,000 53,188,000 63,074,000 63,565,000 51,521,000 59,279,000 59,667,000 62,230,000 51,439,000 54,755,000 59,570,000 57,339,000 48,275,000 51,635,000 52,389,000 49,025,000 36,315,000 39,449,000 40,764,000 
      gross profit
    124,965,000 109,770,000 106,861,000 82,729,000 86,364,000 77,615,000 114,158,000 113,094,000 92,242,000 111,739,000 116,109,000 94,018,000 77,154,000 78,541,000 65,591,000 47,376,000 46,064,000 26,547,000 36,019,000 42,107,000 33,157,000 33,923,000 40,848,000 38,131,000 42,947,000 36,072,000 27,385,000 30,175,000 25,793,000 27,795,000 32,763,000 27,585,000 15,390,000 31,075,000 35,658,000 31,678,000 24,986,000 26,510,000 33,092,000 32,747,000 25,731,000 29,581,000 30,185,000 27,117,000 21,798,000 25,191,000 33,350,000 27,876,000 21,846,000 20,188,000 26,616,000 27,676,000 15,312,000 18,729,000 17,149,000 21,103,000 13,518,000 8,647,000 14,259,000 11,737,000 11,638,000 14,191,000 12,497,000 15,506,000 12,994,000 14,779,000 17,728,000 
      yoy
    44.70% 41.43% -6.39% -26.85% -6.37% -30.54% -1.68% 20.29% 19.56% 42.27% 77.02% 98.45% 67.49% 195.86% 82.10% 12.51% 38.93% -21.74% -11.82% 10.43% -22.80% -5.96% 49.16% 26.37% 66.51% 29.78% -16.41% 9.39% 67.60% -10.56% -8.12% -12.92% -38.41% 17.22% 7.75% -3.26% -2.90% -10.38% 9.63% 20.76% 18.04% 17.43% -9.49% -2.72% -0.22% 24.78% 25.30% 0.72% 42.67% 7.79% 55.20% 31.15% 13.27% 116.60% 20.27% 79.80% 16.15% -39.07% 14.10% -24.31% -10.44% -3.98% -29.51%     
      qoq
    13.84% 2.72% 29.17% -4.21% 11.27% -32.01% 0.94% 22.61% -17.45% -3.76% 23.50% 21.86% -1.77% 19.74% 38.45% 2.85% 73.52% -26.30% -14.46% 26.99% -2.26% -16.95% 7.13% -11.21% 19.06% 31.72% -9.25% 16.99% -7.20% -15.16% 18.77% 79.24% -50.47% -12.85% 12.56% 26.78% -5.75% -19.89% 1.05% 27.27% -13.02% -2.00% 11.31% 24.40% -13.47% -24.46% 19.64% 27.60% 8.21% -24.15% -3.83% 80.75% -18.24% 9.21% -18.74% 56.11% 56.33% -39.36% 21.49% 0.85% -17.99% 13.56% -19.41% 19.33% -12.08% -16.63%  
      gross margin %
    25.15% 25.88% 27.81% 26.55% 26.82% 26.07% 34.88% 36.07% 35.19% 36.44% 37.22% 33.11% 29.01% 30.85% 27.04% 22.69% 25.20% 19.48% 25.99% 29.27% 28.64% 29.07% 30.31% 30.36% 31.24% 29.43% 24.13% 25.26% 22.66% 24.74% 29.01% 25.17% 15.53% 29.83% 31.37% 31.26% 29.03% 28.92% 31.65% 32.00% 30.12% 30.42% 31.99% 30.04% 28.39% 29.73% 32.40% 30.20% 28.61% 27.51% 29.68% 30.33% 22.91% 24.01% 22.32% 25.32% 20.81% 13.64% 19.31% 16.99% 19.42% 21.56% 19.26% 24.03% 26.35% 27.25% 30.31% 
      selling, general and administrative expenses
    67,906,000 65,810,000 63,230,000 59,147,000 51,293,000 48,194,000 48,637,000 45,895,000 45,288,000 47,855,000 51,470,000 39,272,000 32,942,000 31,943,000 28,891,000 26,933,000 23,056,000 21,110,000 15,897,000 16,895,000 14,696,000 14,622,000 14,716,000 15,939,000 15,214,000 14,601,000 12,994,000 13,481,000 11,001,000 11,260,000 13,190,000 13,086,000 10,219,000 13,714,000 13,034,000 11,971,000 10,530,000 8,632,000 10,400,000 10,561,000 8,913,000 9,859,000 10,062,000 9,200,000 8,317,000 8,519,000 13,830,000 10,584,000 7,629,000 8,246,000 9,687,000 9,089,000 6,967,000 6,634,000 6,747,000 6,899,000 5,981,000 5,625,000 5,445,000 5,697,000 5,543,000 5,881,000 5,166,000 6,598,000 4,828,000   
      gain on disposal of assets
      36,000  -40,000         -3,000  -10,000 -2,000 -3,750 -15,000                  -1,000   -12,000   -34,000 -30,000  -6,000    13,000    4,250 4,000             
      income from operations
    57,059,000 43,960,000 43,595,000 23,582,000 35,111,000 29,429,000 65,520,000 67,199,000 46,970,000 63,884,000 64,664,000 54,740,000 44,206,000 46,598,000 36,700,000 20,453,000 23,010,000 5,443,000 20,137,000 25,212,000 18,461,000 25,718,000 26,131,000 22,192,000 27,795,000 21,430,000 14,385,000 16,688,000 14,508,000 16,538,000 19,571,000 14,503,000 5,178,000 17,362,000 22,625,000 19,659,000 14,457,000 17,878,000 22,692,000 22,198,000 16,826,000 19,722,000 20,157,000 17,947,000 13,476,000 16,953,000 19,520,000 17,292,000 14,241,000 11,912,000 16,929,000 18,646,000 8,338,000 12,074,000 10,406,000 14,194,000 7,560,000 1,220,000 8,814,000 6,040,000 6,095,000 8,310,000 7,331,000 8,908,000 8,166,000 9,629,000 12,415,000 
      yoy
    62.51% 49.38% -33.46% -64.91% -25.25% -53.93% 1.32% 22.76% 6.25% 37.10% 76.20% 167.64% 92.12% 756.11% 82.25% -18.88% 24.64% -78.84% -22.94% 13.61% -33.58% 20.01% 81.65% 32.98% 91.58% 29.58% -26.50% 15.07% 180.19% -4.75% -13.50% -26.23% -64.18% -2.89% -0.30% -11.44% -14.08% -9.35% 12.58% 23.69% 24.86% 16.33% 3.26% 3.79% -5.37% 42.32% 15.31% -7.26% 70.80% -1.34% 62.68% 31.37% 10.29% 889.67% 18.06% 135.00% 24.04% -85.32% 20.23% -32.20% -25.36% -13.70% -40.95%     
      qoq
    29.80% 0.84% 84.87% -32.84% 19.31% -55.08% -2.50% 43.07% -26.48% -1.21% 18.13% 23.83% -5.13% 26.97% 79.44% -11.11% 322.74% -72.97% -20.13% 36.57% -28.22% -1.58% 17.75% -20.16% 29.70% 48.97% -13.80% 15.03% -12.27% -15.50% 34.94% 180.09% -70.18% -23.26% 15.09% 35.98% -19.14% -21.21% 2.23% 31.93% -14.68% -2.16% 12.31% 33.18% -20.51% -13.15% 12.88% 21.42% 19.55% -29.64% -9.21% 123.63% -30.94% 16.03% -26.69% 87.75% 519.67% -86.16% 45.93% -0.90% -26.65% 13.35% -17.70% 9.09% -15.19% -22.44%  
      operating margin %
    11.48% 10.36% 11.35% 7.57% 10.90% 9.88% 20.02% 21.43% 17.92% 20.83% 20.73% 19.28% 16.62% 18.30% 15.13% 9.79% 12.59% 3.99% 14.53% 17.52% 15.94% 22.04% 19.39% 17.67% 20.22% 17.48% 12.67% 13.97% 12.75% 14.72% 17.33% 13.23% 5.23% 16.67% 19.90% 19.40% 16.80% 19.50% 21.70% 21.69% 19.70% 20.28% 21.36% 19.88% 17.55% 20.01% 18.97% 18.73% 18.65% 16.23% 18.88% 20.44% 12.48% 15.48% 13.55% 17.03% 11.64% 1.92% 11.94% 8.74% 10.17% 12.62% 11.30% 13.80% 16.56% 17.76% 21.23% 
      interest expense
    -5,055,000 -5,762,000 -5,153,000 -4,009,000 -2,802,000 -1,208,000 -1,091,000 -367,000 -239,000 -884,000 -1,266,000 -1,543,000 -1,150,000 -423,500 -954,000 -550,000                                  -500 -1,000  -1,000 -1,000 -16,000 -11,000 -16,000 -104,000  -104,000 -10,000 -41,000 -4,000     
      other income
    77,000 124,000  -68,000 174,000 45,000 81,000 175,000 77,000 133,000 93,000 163,000 114,000 104,000 54,000 220,000 21,000 24,000 -19,000 39,000 17,000 31,000 15,000 32,000 -27,000 -30,000 -7,000   -58,000 5,000 12,000 -6,000 5,000 41,000 34,000 11,000 -10,000 -12,000 10,000 117,000   27,000  -6,000 -43,000 34,000  -4,000 15,000 253,000 -16,000 -9,000 53,000 -51,000 48,000 213,000  -65,000  -49,000 -64,000 -62,000 -60,000 75,000 -173,000 
      income before taxes
    52,081,000 38,322,000 38,442,000 19,505,000 32,483,000 28,266,000 64,510,000 67,007,000 46,808,000 63,133,000 63,491,000 53,360,000 43,170,000 45,769,000 35,800,000 20,123,000 22,841,000 5,346,000 20,108,000 25,247,000 18,481,000 25,747,000 26,156,000 22,243,000 27,829,000 21,417,000 14,387,000 16,736,000 14,491,000 16,505,000 19,612,000 14,582,000 5,240,000 17,450,000 22,750,000 19,764,000 14,528,000 17,937,000 22,762,000 22,275,000 17,017,000 19,778,000 20,113,000 18,003,000 13,445,000 17,028,000 19,532,000 17,397,000 14,289,000 11,978,000 17,004,000 18,956,000 8,356,000               
      income tax provision
    12,266,000 6,290,000 7,660,000 4,018,000 3,191,000 3,576,000 11,885,000 14,779,000 7,792,000 16,084,000 15,413,000 7,678,000 6,356,000 6,871,000 8,327,000 4,177,000 4,782,000 -840,000 4,527,000 4,632,000 2,105,000 6,855,000 5,696,000 4,439,000 5,976,000 5,396,000 560,000 3,775,000 3,589,000 3,969,000 5,527,000 2,891,000 980,000 1,680,000 8,033,000 5,970,000 4,311,000 6,517,000 7,080,000 7,934,000 6,211,000 6,830,000 6,862,000 6,873,000 5,046,000 6,495,000 7,092,000 6,034,000 4,467,000 4,212,000 6,482,000 6,837,000 1,216,000 4,517,000 4,476,000 4,837,000 3,038,000 469,000 3,029,000 2,063,000 1,966,000 2,534,000 2,134,000 3,137,000 2,994,000 3,549,000 4,565,000 
      net income
    39,815,000 32,032,000 30,782,000 15,487,000 29,292,000 24,690,000 52,625,000 52,228,000 39,016,000 47,049,000 48,078,000 45,682,000 36,814,000 38,898,000 27,473,000 15,946,000 18,059,000 6,186,000 15,581,000 20,615,000 16,376,000 18,892,000 20,460,000 17,804,000 21,853,000 16,021,000 13,827,000 12,961,000 10,902,000 12,536,000 14,085,000 11,691,000 4,260,000 15,770,000 14,717,000 13,794,000 10,217,000 11,420,000 15,682,000 14,341,000 10,806,000 12,948,000 13,251,000 11,130,000 8,399,000 10,533,000 12,440,000 11,363,000 9,822,000 7,766,000 10,522,000 12,119,000 7,140,000 7,578,000 6,007,000 9,297,000 4,567,000 871,000 5,626,000 3,839,000 3,650,000 5,782,000 5,173,000 5,821,000 5,118,000 6,155,000 7,741,000 
      yoy
    35.92% 29.74% -41.51% -70.35% -24.92% -47.52% 9.46% 14.33% 5.98% 20.95% 75.00% 186.48% 103.85% 528.81% 76.32% -22.65% 10.28% -67.26% -23.85% 15.79% -25.06% 17.92% 47.97% 37.37% 100.45% 27.80% -1.83% 10.86% 155.92% -20.51% -4.29% -15.25% -58.30% 38.09% -6.15% -3.81% -5.45% -11.80% 18.35% 28.85% 28.66% 22.93% 6.52% -2.05% -14.49% 35.63% 18.23% -6.24% 37.56% 2.48% 75.16% 30.35% 56.34% 770.03% 6.77% 142.17% 25.12% -84.94% 8.76% -34.05% -28.68% -6.06% -33.17%     
      qoq
    24.30% 4.06% 98.76% -47.13% 18.64% -53.08% 0.76% 33.86% -17.07% -2.14% 5.24% 24.09% -5.36% 41.59% 72.29% -11.70% 191.93% -60.30% -24.42% 25.89% -13.32% -7.66% 14.92% -18.53% 36.40% 15.87% 6.68% 18.89% -13.03% -11.00% 20.48% 174.44% -72.99% 7.15% 6.69% 35.01% -10.53% -27.18% 9.35% 32.71% -16.54% -2.29% 19.06% 32.52% -20.26% -15.33% 9.48% 15.69% 26.47% -26.19% -13.18% 69.73% -5.78% 26.15% -35.39% 103.57% 424.34% -84.52% 46.55% 5.18% -36.87% 11.77% -11.13% 13.74% -16.85% -20.49%  
      net income margin %
    8.01% 7.55% 8.01% 4.97% 9.10% 8.29% 16.08% 16.66% 14.89% 15.34% 15.41% 16.09% 13.84% 15.28% 11.32% 7.64% 9.88% 4.54% 11.24% 14.33% 14.14% 16.19% 15.18% 14.18% 15.90% 13.07% 12.18% 10.85% 9.58% 11.16% 12.47% 10.67% 4.30% 15.14% 12.95% 13.61% 11.87% 12.46% 15.00% 14.02% 12.65% 13.32% 14.04% 12.33% 10.94% 12.43% 12.09% 12.31% 12.86% 10.58% 11.73% 13.28% 10.68% 9.71% 7.82% 11.16% 7.03% 1.37% 7.62% 5.56% 6.09% 8.78% 7.97% 9.02% 10.38% 11.35% 13.23% 
      earnings per share:
                                                                       
      basic eps
    0.49                                                                   
      diluted eps
    0.48                                                                   
      cash dividends declared per common share:
    0.1 0.1 0.1 0.1 0.1 0.08 0.08     0.12 0.12 0.24  0.19  0.19  0.19  0.19  0.19  0.16  0.16  0.16  0.16  0.13  0.13  0.13  0.11  0.11  0.11          0.24  0.12      0.045  0.18  0.045  
      weighted-average shares outstanding:
                                                                       
      basic
    81,756,604 81,529,140 81,543,105 81,441,511 81,472,351 81,473,131 81,089,476     54,293,127 53,640,598 53,054,986 53,185,324 53,095,286 52,613,232 52,404,199 52,420,711 52,432,822 52,293,464 52,168,679 52,260,551 52,099,694 52,071,839 52,079,865 52,111,444 52,120,272 51,992,150 52,284,616 52,238,796 52,383,842 52,433,902 52,572,496 52,566,619 52,615,366 52,622,539 52,924,398 52,891,879 53,036,009 53,061,058 54,045,841 54,209,942 54,208,362         24,507 24,550 24,535 24,552 24,587    16,496 16,799 16,555     
      diluted
    83,179,954 83,105,538 82,952,049 82,956,213 83,351,536 83,629,502 83,107,077     55,646,387 55,240,638 54,097,072 53,958,715 53,661,876 53,950,995 53,728,989 53,546,513 53,603,932 53,814,644 53,061,169 53,151,295 52,750,401 52,871,419 52,635,415 52,722,127 52,747,199 52,369,660 52,667,939 52,627,541 52,717,787 52,910,223 53,078,734 53,014,269 53,151,134 53,190,057 53,449,754 53,394,331 53,401,238 53,430,103 54,481,484 54,579,590 54,669,763         24,641 24,699 24,667 24,728 24,772    16,626 16,893 16,647     
      earnings per share:
                                                                       
      basic
     0.233 0.38 0.19 0.36 0.3 0.65     0.84 0.69 0.73 0.52 0.3 0.34 0.12 0.3 0.39 0.31 0.36 0.39 0.34 0.42 0.31 0.27 0.25 0.21 0.24 0.27 0.22 0.08 0.3 0.28 0.26 0.19 0.22 0.3 0.27 0.2 0.24 0.24 0.21         0.29 0.31 0.24 0.38 0.19    0.22 0.35 0.31 0.34 0.3 0.35 0.45 
      diluted
     0.228 0.37 0.19 0.35 0.3 0.63     0.82 0.67 0.72 0.51 0.3 0.33 0.11 0.29 0.38 0.3 0.35 0.38 0.34 0.41 0.3 0.26 0.25 0.21 0.24 0.27 0.22 0.08 0.3 0.28 0.26 0.19 0.22 0.29 0.27 0.2 0.24 0.24 0.2         0.29 0.31 0.24 0.38 0.18    0.22 0.35 0.31 0.34 0.3 0.35 0.45 
      loss on disposal of assets
         -3,750 1,000  -16,000 -3,250 -25,000 6,000 6,000         -15,250 1,000  -62,000 41,000 6,000 6,000 284,000 -3,000 2,000 -4,000 -7,000 -1,000 -1,000 48,000     -8,000    5,000    -24,000   -59,000 7,000   10,000 -23,000           
      basic1
           0.64 0.48 0.58 0.59                                                         
      diluted1
           0.62 0.46 0.56 0.58                                                         
      cash dividends declared per common share1:
           0.08 0.08 0.08 0.08                                                         
      weighted-average shares outstanding:
                                                                       
      1 reflects three-for-two stock split effective august 16, 2023.
                                                                       
      interest income
                    -190,000 -121,000 -10,000 -4,000 3,000 -2,000 10,000 19,000 61,000 17,000 9,000 31,000 9,000 25,000 36,000 67,000 68,000 83,000 84,000 71,000 60,000 69,000 82,000 67,000 74,000 74,000 14,000 29,000 44,000 81,000 55,000 71,000 69,000 68,000 61,000 57,000 35,000 31,000 40,000 2,000 13,000    34,000 96,000 44,000 112,000 6,000  64,000 
      other expense
                               17,000 -26,000             -26,500 -58,000  -75,000    -21,000            -503,000       
      basic*
                                                0.16 0.2 0.23 0.21 0.27 0.21 0.29 0.33      0.04 0.23 0.16        
      diluted*
                                                0.15 0.19 0.22 0.2 0.26 0.21 0.28 0.33      0.03 0.23 0.15        
      cash dividends declared per common share*:
                                                 0.09  0.09  0.1  0.1      0.03 0.12         
      income before income taxes
                                                         8,055,500 10,483,000 14,134,000 7,605,000 1,340,000 8,655,000 5,902,000 5,616,000 8,316,000 7,307,000 8,958,000 8,112,000 9,704,000 12,306,000 
      earnings per share
                                                                       
      basic
     0.233 0.38 0.19 0.36 0.3 0.65     0.84 0.69 0.73 0.52 0.3 0.34 0.12 0.3 0.39 0.31 0.36 0.39 0.34 0.42 0.31 0.27 0.25 0.21 0.24 0.27 0.22 0.08 0.3 0.28 0.26 0.19 0.22 0.3 0.27 0.2 0.24 0.24 0.21         0.29 0.31 0.24 0.38 0.19    0.22 0.35 0.31 0.34 0.3 0.35 0.45 
      diluted
     0.228 0.37 0.19 0.35 0.3 0.63     0.82 0.67 0.72 0.51 0.3 0.33 0.11 0.29 0.38 0.3 0.35 0.38 0.34 0.41 0.3 0.26 0.25 0.21 0.24 0.27 0.22 0.08 0.3 0.28 0.26 0.19 0.22 0.29 0.27 0.2 0.24 0.24 0.2         0.29 0.31 0.24 0.38 0.18    0.22 0.35 0.31 0.34 0.3 0.35 0.45 
      cash dividends declared per common share
                                                                       
      investment interest income
                                                             13,500 11,000 20,000        
      note receivable interest income
                                                             8,250 11,000 11,000        
      cash dividends declared per common share:*
                                                               0.12        
      weighted average shares outstanding:
                                                                       
      basic
                                                                   16,940 17,186 17,187 17,175 
      diluted
                                                                   17,030 17,271 17,309 17,304 
      selling, general and
                                                                       
      administrative expenses
                                                                     4,660,250 5,313,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 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 
                                                                         
        assets
                                                                         
        current assets:
                                                                         
        cash and cash equivalents
      13,000 13,000 1,041,000 14,000 994,000 14,000 15,000 13,000 8,385,000 287,000 212,000 5,237,000 2,515,000 5,451,000 10,738,000 17,647,000 5,633,000 2,859,000 101,813,000 111,427,000 97,047,000 79,025,000 70,603,000 61,284,000 35,677,000 26,797,000 28,373,000 13,683,000 7,143,000 1,994,000 7,265,000 15,854,000 8,173,000 21,457,000 23,515,000 33,552,000 31,623,000 24,153,000 14,562,000 12,209,000 17,248,000 7,908,000 29,863,000 37,600,000 33,526,000 21,952,000 18,819,000 16,484,000 19,670,000 12,085,000 2,289,000 19,415,000 9,717,000 3,159,000 7,017,000 3,082,000 3,245,000 13,000 2,278,000 2,091,000 5,553,000 2,393,000 4,149,000 4,101,000 15,590,000 25,639,000 17,894,000 
        restricted cash
      1,087,000 1,226,000 1,226,000 1,307,000 1,389,000 6,500,000 6,650,000 12,065,000 19,982,000 8,736,000 22,323,000 22,428,000 465,000 498,000 530,000 563,000 595,000 628,000 660,000 692,000 725,000 3,263,000 7,998,000 9,561,000 16,468,000 17,576,000                                          
        accounts receivable
      290,161,000 314,387,000 266,238,000 170,573,000 164,977,000 147,434,000 143,806,000 149,149,000 109,662,000 138,108,000 160,108,000 154,111,000 160,954,000 127,158,000 134,073,000 124,335,000 113,736,000 70,780,000 58,756,000 53,311,000 52,579,000 47,387,000 62,195,000 56,394,000 69,894,000 67,399,000 56,083,000 68,933,000 58,688,000 54,078,000 51,207,000 53,418,000 54,319,000 50,338,000 57,342,000 43,114,000 44,377,000 43,001,000 53,334,000 58,483,000 42,001,000 50,024,000 45,825,000 45,480,000 39,865,000 44,092,000 54,785,000 52,895,000 45,704,000 39,063,000 46,129,000 50,108,000 38,551,000 43,866,000 42,371,000 52,087,000 34,523,000 34,137,000 40,082,000 42,694,000 38,582,000 39,901,000 36,939,000 36,459,000 30,496,000 33,381,000 35,728,000 
        income tax receivable
      19,691,000 27,445,000 25,508,000 7,302,000 7,438,000 4,115,000 1,125,000 4,969,000    2,699,000   1,941,000 7,618,000 2,092,000 5,723,000 1,999,000 3,339,000 7,353,000 4,587,000 3,914,000 5,154,000  772,000 3,870,000 3,246,000 4,756,000 6,104,000 2,292,000 4,971,000 7,316,000 1,643,000  809,000 3,009,000 6,239,000 2,472,000 669,000  4,702,000 2,172,000 3,385,000 2,381,000 2,569,000    1,073,000 1,769,000 410,000 975,000 694,000 2,313,000 197,000 10,253,000 10,016,000          
        inventories
      313,203,000 261,151,000 250,511,000 234,980,000 198,852,000 187,420,000 177,731,000 182,988,000 196,252,000 213,532,000 214,507,000 215,408,000 199,579,000 198,939,000 176,888,000 164,001,000 146,091,000 130,270,000 104,553,000 87,399,000 84,040,000 82,219,000 78,819,000 85,411,000 72,855,000 73,601,000 80,623,000 77,044,000 74,577,000 77,612,000 79,182,000 70,467,000 68,680,000 70,786,000 66,117,000 63,075,000 55,988,000 47,352,000 43,401,000 40,125,000 42,479,000 38,499,000 41,052,000 47,182,000 44,546,000 37,618,000 37,240,000 36,608,000 34,891,000 32,140,000 33,383,000 34,131,000 33,986,000 32,614,000 37,650,000 39,142,000 36,755,000 34,948,000 42,256,000 45,311,000 39,159,000 33,602,000 34,650,000 34,242,000 30,586,000 28,788,000 31,268,000 
        contract assets
      298,368,000 247,037,000 207,140,000 233,184,000 188,656,000 135,421,000 95,120,000 68,171,000 50,581,000 45,194,000 25,306,000 19,862,000 15,126,000 15,151,000 9,592,000 8,569,000 10,001,000 5,749,000                                                  
        prepaid expenses and other
      21,177,000 17,921,000 7,668,000 6,791,000 9,438,000 7,308,000 3,389,000 5,740,000 7,365,000 3,097,000 2,836,000 4,466,000 5,540,000 1,919,000 2,302,000 4,679,000 5,548,000 2,071,000 2,802,000 2,940,000 3,631,000 3,739,000 1,973,000 1,943,000 2,045,000 1,375,000 1,559,000 1,696,000 1,607,000 1,046,000 1,310,000 1,453,000 1,230,000 518,000 757,000 888,000 929,000 616,000 820,000 1,083,000 2,483,000 533,000 763,000 1,055,000 910,000 609,000 790,000 829,000 701,000 304,000 619,000 900,000 839,000 740,000 575,000 814,000 805,000 723,000 850,000 422,000 603,000 656,000 545,000 661,000 580,000 1,087,000 960,000 
        total current assets
      943,700,000 869,180,000 759,332,000 654,151,000 571,744,000 488,212,000 427,836,000 423,095,000 392,227,000 408,954,000 425,292,000 424,211,000 384,179,000 349,116,000 336,064,000 327,412,000 283,696,000 218,080,000 270,615,000 259,140,000 245,407,000 220,251,000 225,531,000 219,775,000 196,966,000 187,549,000 170,536,000 168,630,000 146,798,000 140,861,000 144,696,000 154,665,000 154,687,000 153,727,000 164,141,000 159,716,000 146,210,000 140,981,000 141,364,000 144,729,000 130,191,000 124,213,000 144,920,000 152,906,000 136,689,000 131,083,000 142,059,000 141,901,000 138,396,000 113,623,000 109,121,000 121,411,000 96,027,000 91,546,000 97,294,000 103,192,000 89,473,000 84,387,000 90,799,000 97,722,000 94,135,000 91,748,000 94,275,000 94,979,000 94,468,000 96,240,000 92,767,000 
        property, plant and equipment
      654,857,000 631,262,000 591,652,000 559,479,000 552,277,000 510,356,000 427,652,000 413,234,000 390,564,000 369,947,000 356,830,000 347,396,000 324,566,000 304,745,000 296,454,000 292,464,000 266,370,000 258,062,000 240,581,000 239,764,000 232,648,000 223,340,000 208,878,000 204,428,000 193,029,000 178,094,000 175,738,000 167,631,000 166,652,000 163,003,000 164,896,000 161,121,000 147,928,000 142,375,000 138,308,000 124,628,000 118,417,000 114,892,000 115,234,000 111,863,000 105,777,000 101,061,000 96,296,000 95,795,000 92,771,000 91,922,000 92,025,000 87,165,000 88,175,000 87,283,000 87,708,000 86,078,000 88,230,000 90,695,000 92,634,000 93,198,000 94,184,000 93,502,000 90,365,000 87,482,000 74,943,000 67,418,000 65,616,000 61,557,000 61,020,000 59,896,000 61,229,000 
        intangible assets, net and goodwill
      171,913,000 165,799,000 163,886,000 162,307,000 160,613,000 160,152,000 158,838,000                                                             
        right of use assets
      17,335,000 17,988,000 17,050,000 17,795,000 14,751,000 15,436,000 15,505,000 16,086,000 16,696,000 11,774,000 12,252,000 7,378,000 7,166,000 7,123,000 1,684,000 5,886,000 16,862,000 16,974,000 1,421,000 1,472,000 1,522,000 1,571,000 1,618,000 1,665,000 1,641,000 1,683,000 1,724,000 1,764,000 1,796,000                                       
        other long-term assets
      1,907,000 2,281,000 2,151,000 2,422,000 808,000 242,000 794,000 849,000 878,000 816,000 6,376,000 6,371,000 6,407,000 6,421,000 4,242,000 2,649,000 1,328,000 1,216,000                                                  
        total assets
      1,789,712,000 1,686,510,000 1,534,071,000 1,399,413,000 1,300,193,000 1,175,234,000 1,030,625,000 1,010,716,000 952,921,000 941,436,000 944,543,000 930,051,000 867,914,000 813,903,000 785,843,000 776,712,000 717,458,000 650,180,000 516,403,000 504,184,000 483,384,000 449,008,000 439,913,000 429,807,000 395,620,000 371,424,000 352,152,000 342,251,000 319,525,000 308,197,000 314,024,000 320,271,000 306,945,000 296,780,000 303,138,000 285,011,000 265,283,000 256,530,000 257,277,000 257,527,000 236,669,000 232,854,000 255,098,000 250,012,000 236,759,000 233,117,000 247,509,000 241,652,000 228,719,000 215,444,000 220,138,000 221,214,000 194,473,000 193,493,000 196,254,000 203,554,000 184,765,000 178,981,000 182,254,000 186,360,000 170,243,000 160,277,000 161,613,000 159,313,000 160,167,000 156,211,000 154,270,000 
        liabilities and stockholders' equity
                                                                         
        current liabilities:
                                                                         
        short-term obligations of nmtc1
      7,535,000                                                                   
        accounts payable
      160,139,000 110,437,000 109,740,000 81,642,000 77,155,000 44,645,000 27,199,000 28,958,000 15,438,000 27,484,000 29,917,000 32,210,000 29,561,000 45,513,000 48,613,000 36,189,000 35,796,000 29,020,000 25,940,000 21,250,000 17,615,000 12,447,000 16,038,000 19,698,000 13,501,000 11,759,000 11,118,000 7,885,000 5,947,000 10,616,000 16,224,000 25,127,000 22,214,000 10,967,000 18,933,000 14,108,000 9,936,000 7,102,000 7,228,000 9,367,000 3,604,000 6,178,000 7,759,000 10,513,000 10,125,000 11,370,000 13,602,000 10,904,000 11,307,000 7,779,000 12,795,000 13,858,000 10,945,000 13,047,000 13,720,000 16,978,000 16,224,000 14,118,000 11,260,000 24,621,000 13,683,000 15,046,000 13,442,000 18,537,000 11,413,000 8,524,000 12,217,000 
        accrued liabilities
      136,731,000 132,213,000 120,468,000 95,332,000 97,041,000 99,347,000 96,243,000 85,499,000 93,198,000 85,508,000 90,986,000 101,201,000 86,173,000 78,630,000 61,780,000 60,125,000 52,890,000 50,206,000 48,266,000 47,291,000 49,064,000 46,586,000 45,468,000 46,992,000 50,684,000 44,269,000 42,764,000 42,713,000 38,053,000 37,455,000 37,492,000 38,146,000 35,078,000 39,098,000 41,682,000 34,293,000 31,186,000 31,940,000 36,110,000 38,087,000 34,435,000 37,235,000 34,482,000 30,755,000 28,518,000 31,343,000 39,922,000 33,857,000 30,643,000 28,550,000 30,314,000 36,045,000 23,683,000 26,578,000   25,111,000 19,994,000 23,923,000 23,047,000 21,774,000 21,200,000 21,834,000 23,594,000 20,156,000 19,186,000 23,242,000 
        contract liabilities
      55,229,000 80,670,000 19,974,000 33,752,000 16,421,000 14,913,000 16,391,000 26,862,000 16,527,000 13,757,000 19,576,000 20,262,000 22,137,000 21,424,000 31,791,000 29,759,000 25,540,000 7,542,000                                                  
        total current liabilities
      359,634,000 330,855,000 250,182,000 210,726,000 206,617,000 174,905,000 139,833,000 141,319,000 125,163,000 126,749,000 140,479,000 153,673,000 137,871,000 145,567,000 142,184,000 136,169,000 114,226,000 86,768,000 74,206,000 78,511,000 66,679,000 59,033,000 61,506,000 76,620,000 64,185,000 56,028,000 53,882,000 58,953,000 44,000,000 48,071,000 53,716,000 71,673,000 57,292,000 50,065,000 60,615,000 55,250,000 41,122,000 39,042,000 43,338,000 53,251,000 38,039,000 43,413,000 42,241,000 47,250,000 38,643,000 42,713,000 53,524,000 49,540,000 41,950,000 36,329,000 43,109,000 53,615,000 34,628,000 39,625,000 42,920,000 54,843,000 41,335,000 38,687,000 49,148,000 58,262,000 43,096,000 36,246,000 39,275,000 42,161,000 31,622,000 30,886,000 35,550,000 
        debt, long-term
      425,154,000 398,320,000 360,142,000 317,277,000 236,417,000 138,891,000                                                              
        deferred tax liabilities
      34,899,000 30,313,000 22,199,000  5,140,000  1,658,000 5,811,000 5,030,000 12,134,000 14,744,000 14,223,000 19,582,000 18,661,000 31,430,000 31,866,000 32,966,000 31,993,000 31,090,000 31,071,000 32,982,000 28,324,000 22,973,000 20,358,000 15,130,000 15,297,000 15,034,000 14,938,000 12,713,000 10,826,000 8,841,000 8,415,000 8,397,000 7,977,000 10,678,000 9,895,000 10,251,000 9,531,000 7,187,000 6,855,000 7,676,000 8,706,000 12,689,000 12,808,000 13,363,000 13,677,000 12,377,000 13,579,000 13,979,000 14,424,000 14,741,000 14,878,000 14,829,000 15,732,000 16,343,000 16,722,000 17,302,000 17,790,000 7,832,000 8,069,000 7,257,000 7,292,000 7,623,000 6,999,000 7,035,000 7,326,000 3,839,000 
        other long-term liabilities
      27,038,000  22,205,000 22,471,000 20,014,000 20,743,000 20,527,000 21,170,000 21,926,000 16,807,000 16,247,000 11,364,000 10,923,000 11,508,000 5,642,000 5,495,000 18,693,000 18,843,000 4,434,000 4,493,000 4,312,000 4,423,000 4,191,000 3,794,000 3,652,000 3,639,000 3,669,000 3,791,000 3,442,000                                       
        new markets tax credit obligations1
      8,778,000  16,233,000 16,193,000 16,153,000  16,074,000 16,034,000 15,994,000                                                           
        commitments and contingencies
                                                                         
        stockholders' equity:
                                                                         
        preferred stock, .001 par value...
                                                                         
        common stock
      327,000 327,000 326,000 326,000 325,000 326,000 325,000 324,000 329,000 326,000 325,000 218,000 217,000 214,000 213,000 213,000 212,000 210,000 210,000 210,000 210,000 209,000 209,000 209,000 208,000 208,000 209,000 209,000 208,000 208,000 209,000 209,000 210,000 210,000 210,000 210,000 210,000 211,000 211,000 212,000 212,000 212,000 217,000 217,000 217,000 216,000 218,000 220,000 147,000 147,000 147,000 147,000 98,000 98,000 98,000 98,000 98,000 98,000 99,000 99,000 68,000 68,000 69,000 69,000 71,000 71,000 71,000 
        additional paid-in capital
      71,913,000 64,358,000 56,350,000 48,607,000 39,020,000 68,946,000 59,398,000 49,174,000 139,184,000 122,063,000 109,874,000 128,636,000 117,077,000 98,735,000 87,949,000 82,078,000 77,574,000 81,654,000 11,966,000 10,998,000 10,957,000 5,161,000 8,175,000 6,451,000  3,631,000 2,680,000 1,586,000 969,000                          249,000           644,000 329,000 
        retained earnings
      861,969,000 830,300,000 806,434,000 783,813,000 776,507,000 755,310,000 737,133,000 691,000,000 645,295,000   531,257,000 492,120,000 461,765,000 435,696,000 408,215,000 402,370,000 384,306,000 388,103,000 372,518,000 361,871,000 345,495,000 336,508,000 316,035,000 306,115,000 286,301,000 276,678,000 262,774,000 258,193,000 247,291,000 249,420,000 238,228,000 239,401,000 237,016,000 230,088,000 217,537,000 211,585,000 205,687,000 204,565,000 194,772,000 188,458,000 178,706,000 198,154,000 187,212,000 181,904,000 173,843,000  177,472,000 171,908,000 163,959,000 161,783,000 152,373,000 144,918,000 138,038,000 136,644,000 131,891,000 126,030,000 122,406,000 125,175,000 119,930,000 119,822,000 116,671,000 114,646,000 109,000,000 120,321,000 116,207,000 113,152,000 
        total stockholders' equity
      934,209,000 894,985,000     796,856,000 740,498,000 784,808,000  682,484,000 660,111,000 609,414,000  523,858,000 490,506,000 480,156,000  400,279,000 383,726,000 373,038,000  344,892,000 322,695,000 306,323,000  279,567,000 264,569,000 259,370,000  249,629,000 238,437,000 239,611,000 237,226,000 230,298,000 217,747,000 211,795,000 205,898,000 204,776,000 194,984,000 188,670,000 178,918,000 198,371,000 187,429,000 182,121,000 174,059,000 179,043,000 177,692,000 172,055,000 164,106,000 161,930,000 152,520,000 145,016,000 138,136,000              
        total liabilities and stockholders' equity
      1,789,712,000 1,686,510,000     1,030,625,000 1,010,716,000 952,921,000  944,543,000 930,051,000 867,914,000  785,843,000 776,712,000 717,458,000  516,403,000 504,184,000 483,384,000  439,913,000 429,807,000 395,620,000  352,152,000 342,251,000 319,525,000  314,024,000 320,271,000 306,945,000 296,780,000 303,138,000 285,011,000 265,283,000 256,530,000 257,277,000 257,527,000 236,669,000 232,854,000 255,098,000 250,012,000 236,759,000 233,117,000 247,509,000 241,652,000 228,719,000 215,444,000 220,138,000 221,214,000 194,473,000 193,493,000              
        deferred tax assets
         3,259,000  836,000                                     6,155,000 5,837,000 6,272,000 6,143,000 7,093,000 5,895,000 5,488,000 4,779,000 5,296,000 5,605,000 4,795,000 4,493,000 4,063,000 4,330,000 3,865,000 4,523,000 4,735,000 4,610,000 4,287,000 4,147,000 4,625,000 4,580,000 4,251,000 3,623,000 4,638,000 
        debt, short-term
          16,000,000 16,000,000                                                              
        short-term obligations of nmtc
       7,535,000                                                                  
        other long term liabilities
       23,299,000                                                                  
        new market tax credit obligations1
       8,738,000                                                                  
        stockholders’ equity:
                                                                         
        total stockholders’ equity
        863,110,000 832,746,000 815,852,000 824,582,000    735,224,000    560,714,000    466,170,000    350,865,000    290,140,000    247,499,000                         136,991,000 131,989,000 126,128,000 122,504,000 125,274,000 120,029,000 119,890,000 116,739,000 114,715,000 110,153,000 121,510,000 117,999,000 114,873,000 
        total liabilities and stockholders’ equity
        1,534,071,000 1,399,413,000 1,300,193,000 1,175,234,000    941,436,000    813,903,000    650,180,000    449,008,000    371,424,000    308,197,000                         196,254,000 203,554,000 184,765,000 178,981,000 182,254,000 186,360,000 170,243,000 160,277,000 161,613,000 159,313,000 160,167,000 156,211,000 154,270,000 
        1 held by variable interest entities
                                                                         
        liabilities and stockholders’ equity
                                                                         
        new markets tax credit obligations 1
           16,113,000    12,194,000                                                          
        revolving credit facility, long-term
            55,677,000 85,884,000  38,328,000 78,420,000 78,536,000 83,664,000 71,004,000 76,291,000 106,249,000 65,000,000 40,000,000                                                  
        2 effective july 9, 2024, our authorized common shares increased from 100,000,000 to 200,000,000
                                                                         
        property, plant and equipment:
                                                                         
        land
             16,018,000 15,918,000 15,438,000 15,296,000 15,291,000 8,904,000 8,537,000 8,537,000 7,916,000 5,016,000 5,016,000 5,016,000 5,016,000 4,109,000 4,072,000 3,804,000 3,804,000 3,298,000 3,274,000 3,274,000 3,125,000 3,114,000 3,114,000 3,029,000 2,794,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 2,233,000 1,417,000 1,353,000 1,340,000 1,340,000 1,340,000 1,340,000 1,340,000 1,340,000 1,340,000 1,340,000 1,340,000 1,340,000 1,328,000 1,328,000 1,328,000 1,328,000 1,328,000 1,328,000 
        buildings
             240,317,000 224,128,000 205,841,000 193,684,000 187,237,000 177,119,000 169,156,000 166,193,000 162,962,000 139,089,000 135,861,000 131,327,000 129,607,000 126,090,000 122,171,000 115,600,000 112,735,000 104,707,000 101,113,000 99,705,000 99,193,000 98,394,000 97,393,000 97,944,000 96,043,000 94,244,000 92,075,000 88,740,000 83,401,000 81,117,000 78,806,000 77,185,000 75,912,000 70,655,000 68,806,000 67,580,000 66,583,000 65,676,000 64,938,000 64,098,000 63,164,000 62,744,000 61,821,000 60,435,000 60,126,000 59,878,000 59,761,000 59,615,000 58,757,000 57,399,000 56,057,000 53,846,000 50,584,000 46,798,000 45,482,000 44,326,000 43,522,000 42,546,000 41,697,000 41,171,000 
        machinery and equipment
             403,664,000 401,637,000 391,366,000 381,271,000 370,414,000 360,628,000 342,045,000 336,123,000 332,178,000 326,306,000 318,259,000 299,226,000 301,964,000 292,961,000 281,266,000 267,763,000 260,548,000 252,544,000 236,087,000 230,806,000 219,438,000 215,928,000 212,779,000 210,182,000 205,464,000 190,827,000 184,316,000 179,712,000 168,375,000 161,024,000 158,216,000 156,932,000 152,165,000 148,645,000 143,100,000 136,952,000 134,745,000 130,474,000 127,968,000 128,459,000 121,909,000 120,942,000 119,439,000 122,356,000 118,253,000 118,005,000 117,617,000 117,648,000 116,255,000 115,910,000 114,256,000 121,256,000 119,491,000 108,708,000 100,559,000 98,188,000 94,549,000 92,695,000 90,213,000 90,331,000 
        furniture and fixtures
             41,128,000 42,861,000 40,787,000 41,488,000 38,344,000 31,868,000 30,033,000 27,814,000 24,571,000 23,817,000 23,072,000 21,679,000 20,726,000 19,971,000 18,956,000 18,342,000 17,926,000 17,116,000 16,862,000 17,310,000 17,107,000 17,079,000 16,597,000 16,035,000 14,747,000 14,407,000 13,714,000 14,136,000 13,458,000 13,315,000 12,783,000 12,543,000 12,058,000 11,661,000 11,270,000 10,746,000 10,581,000 10,068,000 10,388,000 10,230,000 10,136,000 9,934,000 9,748,000 9,539,000 9,322,000 9,100,000 8,906,000 8,415,000 8,318,000 8,057,000 7,784,000 7,456,000 7,101,000 6,850,000 6,356,000 6,096,000 7,470,000 7,377,000 7,225,000 7,407,000 
        total property, plant and equipment
             701,127,000 684,544,000 653,432,000 631,739,000 611,286,000 578,519,000 549,771,000 538,667,000 527,627,000 494,228,000 482,208,000 457,248,000 457,313,000 443,131,000 426,465,000 405,509,000 395,013,000 377,665,000 357,336,000 351,095,000 338,863,000 334,515,000 329,883,000 327,190,000 319,048,000 301,711,000 292,338,000 284,821,000 267,467,000 257,689,000 252,038,000 248,893,000 242,368,000 233,194,000 225,409,000 217,511,000 214,142,000 208,451,000 205,527,000 205,020,000 197,442,000 195,853,000 192,425,000 193,683,000 189,041,000 188,323,000 187,624,000 187,018,000 184,670,000 182,706,000 179,437,000 183,898,000 178,516,000 163,696,000 153,725,000 149,938,000 146,869,000 143,946,000 140,463,000 140,237,000 
        less: accumulated depreciation
             287,893,000 293,980,000 283,485,000 274,909,000 263,890,000 253,953,000 245,026,000 242,213,000 235,163,000 227,858,000 224,146,000 216,667,000 217,549,000 210,483,000 203,125,000 196,631,000 190,585,000 184,636,000 179,242,000 175,357,000 171,232,000 167,863,000 166,880,000 162,294,000 157,927,000 153,783,000 149,963,000 146,513,000 142,839,000 139,272,000 137,146,000 133,659,000 130,505,000 127,417,000 124,348,000 121,215,000 118,347,000 115,680,000 113,605,000 112,995,000 110,277,000 107,678,000 105,142,000 105,975,000 102,963,000 100,093,000 96,929,000 94,384,000 91,472,000 88,522,000 85,935,000 93,533,000 91,034,000 88,753,000 86,307,000 84,322,000 85,312,000 82,926,000 80,567,000 79,008,000 
        intangible assets
             75,560,000 70,664,000 68,053,000 61,901,000 62,803,000 63,704,000 64,606,000 65,507,000 66,409,000 67,310,000 70,121,000    38,000 97,000 155,000 213,000 272,000 331,000 389,000 447,000 506,000 564,000 622,000                                    
        goodwill
             81,892,000 81,892,000 81,892,000 81,892,000 81,892,000 81,892,000 81,892,000 81,892,000 81,892,000 81,892,000 85,727,000    3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,229,000 3,677,000                                   
        retained earnings2
               612,835,000 572,285,000                                                         
        2 reflects three-for-two stock split effective august 16, 2023.
                                                                         
        new market tax credit obligation1
                12,169,000 12,144,000                                                        
        new market tax credit obligation
                  6,460,000 6,449,000 6,438,000 6,427,000 6,417,000 6,406,000 6,394,000 6,383,000 6,373,000 6,363,000 6,351,000 6,340,000 6,330,000 6,320,000                                          
        dividends payable
                     10,096,000    9,970,000    9,930,000    8,355,000    8,400,000    6,849,000    5,797,000    5,982,000    4,779,000    3,712,000    2,950,000    2,966,000      3,100,000  
        note receivable
                        32,000 32,000 32,000 31,000 29,000 28,000 27,000 29,000 28,000 28,000 27,000 27,000 28,000 27,000 27,000 28,000 28,000 26,000 25,000 25,000 25,000 25,000 25,000 23,000 24,000 26,000 25,000 30,000 30,000 29,000 29,000  29,000 29,000 28,000  28,000 27,000 27,000  26,000 26,000 26,000       
        goodwill and intangible assets
                        3,229,000 3,229,000 3,229,000                                               
        note receivable, long-term
                           579,000    597,000    598,000    678,000    657,000    661,000    817,000        1,091,000 1,111,000 1,070,000 1,108,000 1,092,000 1,090,000 1,156,000 1,165,000 1,111,000      
        revolving credit facility
                                                             7,259,000  4,575,000 13,965,000 7,628,000 7,639,000  3,991,000     
        certificates of deposit
                                 4,000,000   2,160,000 5,520,000 6,000,000 2,880,000 5,040,000 5,520,000 3,120,000 5,512,000 6,232,000 9,832,000 10,760,000 10,080,000 10,800,000 6,240,000 4,180,000 6,098,000 7,223,000 10,064,000 9,105,000 8,110,000 8,186,000 3,460,000 2,400,000 3,120,000 1,200,000 2,259,000    240,000 676,000 1,503,000 1,945,000 1,785,000 1,824,000   
        investments held to maturity at amortized cost
                                    1,252,000 2,955,000 8,942,000 6,077,000 11,342,000 12,732,000 7,139,000 14,083,000 20,518,000 22,303,000 15,195,000 12,444,000 8,266,000 6,101,000 4,984,000 11,972,000 16,079,000 19,097,000 22,808,000 16,040,000 11,421,000 7,353,000 4,736,000 2,832,000 2,077,000 1,254,000   572,000 2,328,000 5,249,000 9,520,000 10,939,000 10,630,000 7,894,000   
        deferred revenue
                                   1,655,000 1,638,000 1,546,000 1,445,000 1,512,000 1,547,000 1,542,000 1,546,000 1,498,000 1,423,000 1,295,000 1,154,000 698,000 689,000 833,000 955,000 1,006,000 920,000 841,000 735,000 585,000 358,000 201,000                
        donations
                                   146,000 200,000 200,000 200,000   577,000 569,000 561,000 553,000 1,142,000 1,130,000 1,119,000 1,108,000 1,692,000 1,677,000 1,662,000 1,645,000                     
        issued and outstanding at september 30, 2015 and december 31, 2014, respectively
                                                                         
        issued and outstanding at june 30, 2015 and december 31, 2014, respectively
                                                                         
        issued and outstanding at march 31, 2015 and december 31, 2014, respectively
                                                                         
        issued and outstanding at september 30, 2014 and december 31, 2013, respectively*
                                                                         
        retained earnings*
                                                    178,825,000                     
        55,049,445 and 55,067,031 issued and outstanding at june 30, 2014
                                                                         
        and december 31, 2013, respectively*
                                                                         
        36,652,276 and 36,711,354 issued and outstanding at march 31, 2014
                                                                         
        and december 31, 2013, respectively
                                                                         
        notes receivable
                                                       29,000   1,062,000 28,000              
        notes receivable, long-term
                                                       919,000             1,118,000 75,000 75,000 75,000 75,000 
        36,709,890 and 36,776,624 issued and outstanding at september 30, 2013
                                                                         
        and december 31, 2012, respectively*
                                                                         
        36,754,988 and 36,776,624 issued and outstanding at june 30, 2013
                                                                         
        no shares issued
                                                                         
        24,510,111 and 24,517,749 issued and outstanding at march 31, 2013
                                                                         
        and december 31, 2012, respectively
                                                                         
        accrued liabilities­
                                                            29,200,000 27,656,000            
        note receivable, current
                                                               27,000    26,000 26,000     
        * reflects three-for-two stock split effective june 13, 2011.
                                                                         
        financial derivative asset
                                                                    457,000 989,000    
        assets held for sale
                                                                     1,532,000 1,573,000 1,522,000 1,473,000 
        current maturities of long-term debt
                                                                    8,000 30,000 53,000 76,000 91,000 
        accumulated other comprehensive income, net of tax
                                                                     1,084,000 1,118,000 1,077,000 1,321,000 
        long-term debt, less current maturities
                                                                         
        financial derivative assets
                                                                      1,674,000   
        derivative assets
                                                                       2,200,000 806,000 
        long-term debt
                                                                        8,000 
        preferred stock, .0001 par value...
                                                                         
      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 2015-12-31 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 
                                                                          
          operating activities
                                                                          
          net income
        39,815,000 -75,453,407 30,782,000 15,487,000 29,292,000 24,690,000 52,625,000 52,228,000 39,016,000 47,049,000 48,078,000 45,682,000 36,814,000 38,898,000 27,473,000 15,946,000 18,059,000 6,186,000 15,581,000 20,615,000 16,376,000 18,892,000 20,460,000 17,804,000 21,853,000 16,021,000 13,827,000 12,961,000 10,902,000 12,536,000 14,085,000 11,691,000 4,260,000 15,770,000 14,717,000 13,794,000 10,217,000 11,420,000 16,809,000 14,341,000 10,806,000 12,948,000 13,251,000 11,130,000 8,399,000 10,533,000 12,440,000 11,363,000 9,822,000 7,766,000 10,522,000 12,119,000 7,140,000 7,578,000 6,007,000 9,297,000 4,567,000 871,000 5,626,000 3,839,000 3,650,000 5,782,000 5,173,000 5,821,000 5,118,000 6,155,000 
          adjustments to reconcile net income to net cash from operating activities
                                                                          
          depreciation and amortization
        20,903,000 -58,758,809 19,959,000 19,936,000 18,943,000 17,550,000 17,262,000 14,486,000 13,437,000 13,029,000 12,203,000 10,962,000 10,274,000 9,482,000 9,324,000 9,224,000 7,076,000 7,811,000 7,608,000 7,526,000 7,398,000 6,663,000 6,631,000 6,338,000 6,002,000 5,139,000 5,867,000 5,846,000 5,914,000 4,790,000 4,427,000                                    
          amortization of debt issuance costs
        40,000 -249,606 122,000 76,000 52,000 43,000 40,000 40,000 31,000                                                          
          amortization of right of use assets
        40,000 -117,834 49,000 44,000 25,000 56,000 60,000 61,000 12,000 158,000 99,000 38,000 29,000 133,000 48,000 76,000 67,000                                                  
          (recoveries of) provision for losses on accounts receivable, net of adjustments
        -120,000                                                                  
          provision for excess and obsolete inventories, net of write-offs
        701,000  737,000 231,000 57,000  1,207,000 60,000 581,000 -1,346,000 1,521,000 1,237,000 221,000                                                      
          share-based compensation
        7,696,000 -13,403,006 4,626,000 4,774,000 4,021,000 3,915,000 4,363,000 4,494,000 3,957,000 4,282,000 4,279,000 4,304,000 3,519,000 3,471,000 3,321,000 3,796,000 3,112,000 3,028,000 2,991,000 3,032,000 2,761,000 2,796,000 2,852,000 3,343,000 2,351,000 3,941,000 2,785,000 3,043,000 2,030,000 1,760,000 1,915,000 1,975,000 1,724,000 1,498,000 1,431,000 1,884,000 1,645,000 1,185,000 1,129,000 1,095,000 948,000 815,000 795,000 843,000 438,000 600,000 594,000 572,000 412,000 709,000 359,000 303,000 392,000 669,000 261,000 195,000 169,000 171,000 163,000 171,000 175,000 182,000 188,000 212,000 209,000 217,000 
          other
         31,985 39,000 -26,000 -45,000                                                              
          deferred income taxes
        4,586,000 -23,003,851 25,458,000 -8,399,000 5,976,000 -2,494,000 -4,153,000 781,000 -740,000 -2,610,000 521,000 -5,359,000 921,000 -12,769,000 -436,000 -1,100,000 973,000 903,000 19,000 -1,911,000 4,658,000 5,351,000 2,615,000 5,228,000 -167,000 1,830,000 96,000 2,225,000 1,887,000 1,985,000 426,000 18,000 420,000 -2,701,000 783,000 -356,000 720,000 2,344,000 332,000 -821,000 -1,030,000 2,172,000 -437,000 -120,000 -443,000 2,250,000 -2,400,000 -807,000 -1,154,000 200,000 172,000 -761,000 -1,205,000 -1,041,000 -112,000 -1,045,000 170,000 10,170,000 -362,000 489,000 -175,000 147,000 579,000 -365,000 -919,000 4,350,000 
          changes in assets and liabilities:
                                                                          
          accounts receivable
        24,346,000 118,728,977 -95,487,000 -5,778,000 -17,631,000 -3,528,000 5,697,000 -40,544,000 28,334,000 22,062,000 -5,258,000 6,958,000 -33,740,000 7,287,000 -9,857,000 -10,492,000 -43,244,000 1,632,000 -5,433,000 -757,000 -5,179,000 14,848,000 -5,918,000 13,718,000 -2,789,000 -11,316,000 12,887,000 -10,258,000 -4,725,000 -2,978,000 2,233,000 810,000 -2,897,000 7,005,000 -14,267,000 1,306,000 -1,560,000 10,388,000 5,077,000 -16,317,000 7,900,000 -4,199,000 -399,000 -5,572,000 4,286,000 10,656,000 -1,839,000 -7,313,000 -6,511,000 7,046,000 3,960,000 -11,390,000 5,046,000 -1,419,000 9,722,000 -17,559,000 -390,000 5,992,000 2,748,000 -4,016,000 1,329,000 -2,881,000 -608,000 -5,895,000 2,981,000 2,944,000 
          income tax receivable
        7,754,000              5,677,000 -5,526,000 3,631,000                         -2,302,000 978,000 350,000 1,286,000 -2,238,000 228,000 324,000 1,429,000 -1,289,000 -2,189,000 4,114,000 -172,000 3,914,000 6,038,000 -237,000          
          inventories
        -52,753,000 64,042,117 -16,268,000 -36,359,000 -11,489,000 -6,873,000 4,050,000 13,204,000 16,699,000 2,321,000 -620,000 -17,066,000 -861,000 -23,411,000 -14,119,000 -17,838,000 -16,041,000 -23,243,000 -17,240,000 -3,845,000 -1,627,000 -2,732,000 4,623,000 -12,637,000 1,020,000 6,571,000 -3,429,000 -3,263,000 2,678,000 1,473,000 -8,471,000 -2,047,000 3,447,000 -4,879,000 -2,836,000 -7,287,000 -8,696,000 -4,156,000 -3,388,000 2,183,000 -4,117,000 2,264,000 6,300,000 -2,654,000 -6,969,000 -290,000 -699,000 -1,869,000 -2,755,000 1,468,000 481,000 -177,000 -1,541,000 4,973,000 1,492,000 -2,387,000 -1,807,000 7,358,000 3,055,000 -6,152,000 -5,557,000 1,048,000 -408,000 -3,656,000 -1,798,000 2,501,000 
          contract assets
        -51,331,000 71,807,184 26,044,000 -44,728,000 -53,235,000 -40,700,000 -26,949,000 -17,590,000 -5,387,000 -19,888,000 -5,444,000 -4,736,000 25,000 -5,559,000 -1,023,000 1,432,000 -4,252,000                                                  
          prepaid expenses and other long-term assets
        -1,487,000 759,327 -703,000 2,635,000 -2,703,000 -3,403,000 2,404,000 1,641,000 -4,349,000 -152,000 1,606,000 1,111,000 -3,613,000 -2,297,000 2,996,000                                                    
          accounts payable
        50,375,000 -59,838,096 23,494,000 14,772,000 21,625,000 15,226,000 3,537,000 8,164,000 -9,968,000 -2,685,000 -757,000 1,444,000 -16,318,000 -7,042,000 12,126,000 165,000 6,325,000 -5,491,000 5,740,000 5,746,000 4,904,000 -5,809,000 761,000 151,000 2,742,000 -502,000 3,374,000 3,138,000 -5,730,000 -5,504,000 -8,646,000 3,141,000 9,833,000 -738,000 -3,020,000 5,065,000 1,736,000 -295,000 -899,000 4,977,000 -3,129,000 -1,308,000 -2,771,000 286,000 -1,316,000 -2,470,000 2,560,000 -19,000 3,441,000 -4,970,000 -1,328,000 2,939,000 -1,838,000 -220,000 -1,534,000 3,503,000 712,000 -470,000 -13,238,000 10,291,000 666,000 1,604,000 -5,094,000 7,128,000 2,884,000 -3,639,000 
          contract liabilities
        -25,441,000 -4,995,243 -13,778,000 17,331,000 1,508,000 -1,478,000 -10,471,000 10,335,000 2,770,000 -5,819,000 -686,000 -1,875,000 713,000 -10,367,000 2,032,000 4,219,000 17,998,000                                                  
          extended warranties
        4,387,000 -430,169 579,000 -185,000 37,000 586,000 54,000 497,000 698,000 551,000 523,000 749,000 777,000                                                      
          accrued liabilities and other long-term liabilities
        4,483,000 -20,388,127 24,987,000 -2,155,000 -2,412,000 2,747,000 10,568,000 988,000 -1,044,000 -6,319,000 -11,646,000 32,204,000 847,000 4,088,000 5,734,000                                                    
          net cash from operating activities
        33,994,000 18,784,534 12,256,000 -21,826,000 -9,214,000 845,000 63,775,000 35,542,000 92,370,000 51,750,000 47,205,000 55,117,000 4,823,000 17,904,000 44,994,000 5,223,000 -6,803,000 -13,520,000 11,791,000 34,074,000 28,838,000 31,819,000 34,233,000 25,165,000 37,597,000 27,342,000 34,711,000 20,959,000 14,913,000 10,664,000 7,946,000 25,502,000 10,744,000 16,129,000 8,105,000 23,594,000 10,166,000 16,916,000 18,535,000 13,224,000 15,248,000 16,724,000 24,197,000 7,654,000 4,335,000 13,135,000 21,639,000 8,436,000 9,069,000 14,749,000 11,103,000 19,249,000 8,491,000 12,754,000 18,837,000 8,005,000 11,571,000 15,209,000 1,100,000 8,760,000 1,415,000 8,480,000 1,264,000 9,624,000 12,784,000 8,876,000 
          investing activities
                                                                          
          capital expenditures
        -45,127,000 127,876,437 -45,552,000 -35,792,000 -46,723,000 -96,289,000 -33,990,000 -30,693,000 -34,688,000 -21,394,000 -22,271,000 -31,694,000 -28,935,000 -12,438,000 -14,359,000 -13,196,000 -14,031,000 -12,726,000 -9,479,000 -16,753,000 -16,404,000 -18,847,000 -15,445,000 -11,633,000 -21,877,000 -6,335,000 -14,047,000 -8,012,000 -8,772,000 -2,940,000 -8,403,000 -17,474,000 -8,451,000 -15,277,000 -9,589,000 -10,776,000 -6,071,000 -2,977,000 -7,802,000 -8,493,000 -7,332,000 -8,192,000 -3,471,000 -5,717,000 -3,587,000 -2,560,000 -7,664,000 -2,287,000 -3,616,000 -2,634,000 -4,458,000 -952,000 -997,000 -1,565,000 -4,491,000 -5,132,000 -2,959,000 -5,276,000 -5,731,000 -14,637,000 -10,270,000 -4,420,000 -6,578,000 -2,943,000 -3,529,000 -1,130,000 
          free cash flows
        -11,133,000 146,660,971 -33,296,000 -57,618,000 -55,937,000 -95,444,000 29,785,000 4,849,000 57,682,000 30,356,000 24,934,000 23,423,000 -24,112,000 5,466,000 30,635,000 -7,973,000 -20,834,000 -26,246,000 2,312,000 17,321,000 12,434,000 12,972,000 18,788,000 13,532,000 15,720,000 21,007,000 20,664,000 12,947,000 6,141,000 7,724,000 -457,000 8,028,000 2,293,000 852,000 -1,484,000 12,818,000 4,095,000 13,939,000 10,733,000 4,731,000 7,916,000 8,532,000 20,726,000 1,937,000 748,000 10,575,000 13,975,000 6,149,000 5,453,000 12,115,000 6,645,000 18,297,000 7,494,000 11,189,000 14,346,000 2,873,000 8,612,000 9,933,000 -4,631,000 -5,877,000 -8,855,000 4,060,000 -5,314,000 6,681,000 9,255,000 7,746,000 
          grant proceeds received
        1,650,000                                                                  
          proceeds from sale of property, plant and equipment
         -274,960 235,000 40,000 4,000 5,000 16,000 25,000 2,000 102,000 10,000 2,000 17,000   -1,000 61,000 1,000 9,000 7,000 52,000 2,000 5,000 6,000 2,000 1,000 7,000 27,000 -7,000 8,000 33,000   289,000 1,000 2,000 27,000 20,000 12,000   -300,000 5,000 6,000 300,000 427,000 6,000 14,000 35,000 31,000     
          acquisition of intangible assets
        -7,808,000 10,853,671 -3,826,000 -3,325,000 -3,717,000                                                              
          principal payments from note receivable
         -36,565 12,000 13,000 12,000 13,000 12,000 13,000 13,000 12,000 11,000 14,000 14,000 7,000 14,000 13,000 14,000 13,000 12,000 15,000 14,000 14,000 13,000 13,000 12,000 12,000 11,000 11,000 17,000 21,000 16,000 2,000 14,000 12,000 22,000 13,000 13,000 13,000 13,000 13,000 13,000 12,000 14,000 14,000 14,000 11,000 17,000 18,000 17,000 17,000 12,000 20,000 20,000 49,000 5,000            
          net cash from investing activities
        -51,285,000 138,430,583 -49,131,000 -39,104,000 -50,388,000 -99,327,000 -38,351,000 -36,683,000 -38,714,000 -26,579,000 -22,235,000 -31,678,000 -28,819,000 -12,431,000 -14,345,000 -35,173,000 -14,264,000 -116,143,000 -9,450,000 -16,736,000 -16,390,000 -12,417,000 -15,432,000 -11,620,000 -21,804,000 -6,322,000 -10,027,000 -11,994,000 -8,703,000 493,000 -3,327,000 -11,380,000 -20,421,000 -7,846,000 -7,706,000 -18,769,000 3,269,000 4,158,000 -2,202,000 -14,975,000 -3,906,000 -5,463,000 -22,848,000 -2,897,000 8,014,000 6,115,000 -2,842,000 -10,103,000 801,000 1,346,000 -23,046,000 -8,345,000 -1,281,000 -9,510,000 -3,427,000 -14,746,000 -2,652,000 -4,272,000 -3,740,000 -11,306,000 -5,220,000 -2,296,000 -4,391,000 -3,738,000 -17,851,000 -995,000 
          financing activities
                                                                          
          borrowings of debt
        252,867,000 -657,542,609 243,332,000 179,201,000 235,925,000                                                              
          payments of debt
        -226,033,000 452,776,796 -200,467,000 -114,571,000 -138,411,000                                                              
          payment related to financing costs
        -1,395,000 1,393,605    -417,000                                                         
          stock options exercised
        3,062,000 -13,257,856 3,250,000 5,669,000 4,356,000 6,216,000 9,824,000 5,977,000 9,844,000 8,008,000 2,007,000 7,388,000 15,856,000 12,150,000 4,605,000 3,495,000 2,890,000 6,575,000 2,725,000 2,410,000 9,438,000 2,899,000 4,346,000 9,676,000 4,497,000 1,342,000 3,598,000 3,675,000 4,010,000 1,483,000 1,205,000 959,000 1,340,000 544,000 142,000 675,000 898,000 382,000 426,000 546,000 709,000 155,000 106,000 1,452,000 1,082,000 410,000 276,000 292,000 340,000 481,000 219,000 413,000 354,000 943,000 984,000 14,000 55,000 121,000 241,000 73,000 59,000 114,000 78,000 848,000 128,000 365,000 
          repurchase of stock - open market
                                                                          
          repurchases of stock - ltip plans
        -3,203,000 9,290,270 -133,000                                                                
          cash dividends paid to stockholders
        -8,146,000 24,404,397 -8,161,000 -8,181,000 -8,095,000  -6,492,000 -6,523,000 -6,556,000  -6,942,000 -6,545,000 -6,459,000             -8,342,000    -8,328,000    -6,835,000    -6,856,000    -5,892,000    -4,883,000    -3,716,000    -5,890,000        -2,976,000 -3,092,000 -3,100,000 
          net cash from financing activities
        17,152,000 -152,973,392 37,821,000 59,868,000 55,471,000 98,331,000 -30,837,000 -15,148,000 -34,312,000 -38,683,000 -30,100,000 1,246,000 21,027,000 -10,792,000 -37,591,000 41,932,000 23,808,000 30,677,000 -11,987,000 -2,991,000 3,036,000 -15,715,000 -11,045,000 5,155,000 -8,021,000 -5,020,000 -9,994,000 -2,425,000 -1,061,000 -16,428,000 -13,208,000 -6,441,000 -3,607,000 -10,341,000 -10,436,000 -2,896,000 -5,965,000 -11,483,000 -13,980,000 -3,288,000 -2,002,000 -33,216,000 -9,086,000 -683,000 -775,000 -16,117,000 -16,462,000 -1,519,000 -2,285,000 -6,299,000 -5,183,000 -1,206,000 -652,000   6,578,000 -5,687,000     -7,939,000 3,098,000 -17,379,000 -4,980,000 75,000 
          net decrease in cash, cash equivalents, and restricted cash
        -139,000                                                                  
          cash, cash equivalents, and restricted cash, beginning of period
        1,239,000                                                                  
          cash, cash equivalents, and restricted cash, end of period
        1,100,000                                                                  
          provision for (recoveries of) losses on accounts receivable, net of adjustments
                                                                          
          provision for losses on contract assets, net of adjustments
                                                                          
          provision for (recoveries of) excess and obsolete inventories, net of write-offs
                                                                          
          proceeds from government incentive grant
                                                                          
          proceeds from financing obligation, net of issuance costs
             4,186,000                                                        
          net increase in cash, cash equivalents, and restricted cash
                                                                          
          cash, cash equivalents, and restricted cash, beginning of year
                                                                          
          cash, cash equivalents, and restricted cash, end of year
                                                                          
          adjustments to reconcile net income to net cash from operating activities:
                                                                          
          provision for credit losses on accounts receivable, net of adjustments
          -178,000 182,000 88,000         -372,000 119,000       -40,000                                             
          provision for credit losses on contract assets, net of adjustments
                                                                         
          income taxes
          -18,206,000 136,000 -3,323,000 -2,990,000 3,844,000 -14,360,000 8,221,000 1,170,000 2,699,000 -20,433,000 5,262,000      1,340,000 4,014,000 -2,766,000  1,240,000 -5,154,000 772,000  -624,000 1,510,000 1,348,000  2,679,000 2,345,000 -5,673,000  809,000 2,200,000 3,230,000  -2,932,000 -1,572,000 6,734,000                          
          repurchases of stock - open market
                                                                         
          net increase in cash, cash equivalents and restricted cash
          946,000 -1,062,000 -4,131,000 -151,000 -5,413,000 -16,289,000 19,344,000 -13,512,000 -5,130,000 24,685,000 -2,969,000 -5,319,000 -6,942,000 11,982,000 2,741,000 -98,986,000 -9,646,000 14,347,000 15,484,000 3,687,000 7,756,000 18,700,000 7,772,000                                          
          cash, cash equivalents and restricted cash, beginning of period
          6,514,000  9,023,000  5,949,000  3,487,000  82,288,000  44,373,000                                          
          cash, cash equivalents and restricted cash, end of period
          946,000 -1,062,000 2,383,000  -5,413,000 -16,289,000 28,367,000  -5,130,000 24,685,000 2,980,000  -6,942,000 11,982,000 6,228,000  -9,646,000 14,347,000 97,772,000  7,756,000 18,700,000 52,145,000                                          
          repurchase of stock
            -31,536,000      -4,794,000 -2,031,000 -2,634,000 -3,278,000 -5,862,000 -4,743,000 -5,086,000 -5,185,000 -8,670,000 -5,453,000 -4,372,000 -11,565,000 -4,149,000 -5,246,000 -5,708,000 -4,483,000 -9,346,000 -5,961,000 -7,160,000 -4,379,000 -3,629,000 -3,623,000 -3,065,000 -6,303,000 -4,745,000 -6,898,000 -4,218,000 -3,456,000 -27,707,000 -2,992,000 -3,489,000 -2,955,000 -11,975,000 -12,193,000 -2,135,000 -2,981,000 -3,405,000 -1,807,000 -1,895,000 -1,115,000              
          employee taxes paid by withholding shares
            -6,768,000 -582,000 -3,962,000 -452,000 -3,041,000 -100,000 -40,000 -132,000 -1,030,000 -40,000 -24,000 -150,000 -804,000 -53,000 -5,000 -315,000 -1,217,000 -39,000 -28,000 -149,000 -953,000 -184,000 -43,000 -392,000 -588,000 -237,000 -52,000 -240,000 -568,000 -421,000 -127,000 -506,000 -560,000 -264,000                             
          provision for (recoveries of) credit losses on accounts receivable, net of adjustments
             -100,000 -354,000 1,057,000 112,000                                                          
          (recoveries of) provision for excess and obsolete inventories, net of write-offs
                                                                          
          cash paid in business combination, net of cash acquired
                     -249,000                                                  
          payments related to financing costs
                                                                          
          principal payments on financing lease
                     -87,000                                                    
          dividends paid to stockholders
                                                                          
          cash, cash equivalents and restricted cash, beginning of year
                                                                          
          cash, cash equivalents and restricted cash, end of year
                                                                          
          gain on disposition of assets
                     -10,000 -2,000                    -1,000   -34,000 -30,000 5,000        -4,000    -6,000       -63,000 
          foreign currency transaction loss
              -5,000 4,000 11,000     -1,000 33,000    10,000 -3,000 -8,000 -30,000 -12,000 -21,000 51,000             16,000 10,000 -48,000 25,000 61,000 -17,000 70,000 38,000                     
          interest income on note receivable
              -5,000 -4,000 -5,000 -6,000 -5,000 -4,000 -6,000 -5,000 -6,000 -5,000 -6,000 -5,000 -13,000 -6,000 -5,000 -7,000 -6,000 -6,000 -6,000 7,000 -20,000 -6,000 -54,000 13,000 5,000 9,000 -7,000 -5,000 -6,000 -7,000 -7,000 -7,000 -7,000 -7,000 -7,000 -7,000 -8,000 -8,000 -6,000 -10,000 -10,000 -10,000 -9,000 -11,000 -10,000 -10,000              
          software development expenditures
              -4,378,000 -6,003,000 -4,055,000                                                          
          borrowings under revolving credit facility
              137,977,000 157,396,000 115,130,000 153,039,000 164,111,000 174,789,000 105,172,000 74,655,000 56,203,000 69,900,000 25,000,000                               6,004,000 366,000 1,955,000 7,739,000 13,997,000 13,111,000 15,521,000 30,326,000 23,588,000 12,643,000 14,157,000    
          payments under revolving credit facility
              -168,184,000 -71,512,000 -153,458,000 -193,131,000 -164,227,000 -179,917,000 -92,512,000 -79,942,000 -86,161,000                                 -6,004,000 -366,000 -1,955,000 -14,998,000 -6,738,000 -17,686,000 -24,911,000 -23,989,000 -23,599,000 -5,004,000 -18,148,000    
          loss on disposition of assets
               -16,000   6,000 6,000         -6,417,000 1,000 -62,000 41,000 6,000 6,000 284,000 -3,000 2,000 -4,000 -7,000 -1,000 -1,000      -8,000        -24,000    7,000    -23,000    6,000 32,000     
          (recoveries of) provision for credit losses on accounts receivable, net of adjustments
                 -62,000 79,000 -115,000 -56,000                                                      
          cash paid for building
                                                                        
          amortization of debt issuance cost
                  25,000 21,000 11,000  11,000 10,000 11,000  11,000 10,000 10,000  11,000 10,000 10,000                                          
          foreign currency transaction gain
                    -2,000    -9,000          -4,000 3,000 -16,000  -35,000 12,000 3,000  -41,000 -19,000 -5,000            31,000 32,000 -8,000 24,000 19,000 13,000             
          provision for excess and obsolete inventories
                     1,360,000 1,232,000   251,000   -194,000 -668,000 1,969,000 81,000 -274,000 451,000 -150,000 796,000 357,000 97,000 -244,000 198,000 101,000 210,000 -206,000 200,000 60,000 205,000 112,000 171,000 137,000 289,000 -170,000 18,000 41,000 -88,000 67,000 152,000 4,000 -225,000 267,000 32,000 169,000             -4,000 
          gain on disposition of assets and insurance recoveries
                                                                          
          insurance proceeds
                                                                          
          deferred revenue
                      309,000 353,000 68,000 131,000 -258,000 -1,784,000 2,358,000 -118,000 655,000 244,000 229,000 162,000 91,000 147,000 25,000 2,056,000 -713,000 -968,000 37,000 -158,000 298,000 40,000 78,000 83,000 114,000 110,000 110,000 51,000 2,000 72,000 64,000 191,000 213,000 174,000 204,000 257,000 157,000                
          provision for (recovery of) credit losses on accounts receivable, net of adjustments
                        288,000                                                  
          provision for (recovery of) excess and obsolete inventories
                        220,000                                                  
          prepaid expenses and other
                        -3,588,000 437,000 138,000 691,000 108,000 -1,766,000 -30,000 102,000 -670,000 184,000 137,000 -89,000 -561,000 264,000 143,000 -223,000 -712,000 239,000 131,000 41,000 -313,000 204,000 263,000 1,400,000 -1,950,000 230,000 292,000 -145,000 -301,000 181,000 39,000 -128,000 -397,000 315,000 281,000 -61,000 -99,000 -165,000 239,000 -9,000 -82,000 127,000 -428,000 181,000 53,000 -111,000 116,000 -81,000 507,000 -128,000 
          accrued liabilities
                        2,511,000  1,225,000 242,000 58,000  -1,735,000 -3,818,000 6,241,000  -122,000                 2,058,000 -2,925,000 -8,667,000 7,576,000 3,146,000 2,039,000 532,000 -4,784,000 9,089,000 -2,895,000 -4,791,000 -339,000 6,584,000 5,130,000 -3,894,000 975,000 1,340,000 -1,445,000 -609,000 -1,766,000 3,762,000 983,000 -3,734,000 
          loss on disposition of assets and insurance recoveries
                                                                          
          accrued liabilities and donations
                                    411,000 -2,130,000 151,000 4,137,000 -3,924,000 -2,461,000 6,519,000 3,071,000 -776,000 -4,170,000 -2,552,000 4,982,000 -3,730,000                          
          investment in certificates of deposits
                                   -2,880,000 -4,320,000     -480,000    -720,000   -239,000 -7,911,000 -720,000 -238,000 -2,260,000 -6,000            
          maturities of certificates of deposits
                                 4,000,000   2,160,000 3,360,000 3,360,000 1,200,000 2,160,000 480,000 2,880,000 2,392,000 720,000 3,840,000 4,800,000 1,200,000 1,440,000 2,020,000 2,638,000 2,565,000 2,841,000 2,501,000 1,403,000 2,160,000 720,000 720,000 240,000             
          provision (recoveries) for excess and obsolete inventories
                                                                          
          (recovery of) provision for credit losses on accounts receivable, net of adjustments
                            -13,000                                              
          amortization of bond premiums
                                     2,000 3,000 3,000 5,000 8,000 10,000 13,000 16,000 33,000 65,000 68,000 83,000 98,000 62,000 45,000 61,000 127,000 172,000 173,000 216,000 245,000 241,000 177,000 127,000 75,000 60,000   1,000 18,000 47,000 90,000      
          cash paid in business combination
                                     -377,000 -6,000,000                                  
          purchases of investments held to maturity
                                     -1,506,000 -7,495,000   -602,000      -925,000   -12,306,000 -8,573,000 -1,396,000 -6,030,000            
          maturities of investments held to maturity
                                                                          
          proceeds from called investments
                                     100,000 395,000 1,000,000   2,003,000 501,000 505,000 505,000 256,000 253,000 504,000 504,000                     
          provision for losses on accounts receivable, net of adjustments
                               -218,000 294,000 -37,000 13,000 115,000 107,000 -22,000 100,000 -11,000 -1,000 39,000 -43,000 184,000 -55,000 72,000 -165,000 123,000 54,000 -43,000 -59,000 37,000 -51,000 122,000 -130,000 20,000 19,000 -167,000 269,000 -76,000 -6,000 -5,000 4,000 -47,000 -136,000 -96,000 -10,000 -81,000 128,000 -68,000 -96,000  
          maturities of investments
                                     1,250,000 1,700,000 7,390,000 4,230,000 4,257,000 1,380,000 7,135,000 6,928,000 4,399,000 1,821,000 2,101,000 1,700,000 1,501,000 706,000 756,000 8,445,000 5,306,000 2,352,000 3,822,000 2,717,000 -1,310,000 1,605,000 1,100,000 610,000     571,000 1,738,000 2,874,000 4,181,000      
          net increase in cash and cash equivalents
                                  14,690,000 6,540,000 5,149,000   7,681,000 -13,284,000 -2,058,000 -10,037,000 1,929,000 7,470,000 9,591,000 2,353,000 -5,039,000 9,340,000 -21,955,000 -7,737,000 4,074,000 11,574,000 3,133,000 2,335,000 -3,186,000 7,585,000 9,796,000 -17,126,000 9,698,000 6,558,000 -3,858,000 3,935,000 -163,000 3,232,000    3,160,000 -1,756,000 48,000 -11,489,000 -10,049,000 7,745,000 
          cash and cash equivalents, beginning of period
                                  1,994,000  21,457,000  24,153,000  7,908,000  21,952,000  12,085,000  3,159,000              
          cash and cash equivalents, end of period
                                  14,690,000 6,540,000 7,143,000  -8,589,000 7,681,000 8,173,000  -10,037,000 1,929,000 31,623,000  2,353,000 -5,039,000 17,248,000  -7,737,000 4,074,000 33,526,000  2,335,000 -3,186,000 19,670,000  -17,126,000 9,698,000 9,717,000  3,935,000 -163,000 3,245,000  187,000 -3,462,000 5,553,000  48,000 -11,489,000 15,590,000  
          cash and cash equivalents, beginning of year
                                                             13,000 2,393,000 25,639,000 
          cash and cash equivalents, end of year
                                                                          
          net decrease in cash and cash equivalents
                                                                  187,000        
          depreciation
                                        4,129,000 3,982,000 3,744,000 3,643,000 3,638,000 3,488,000 3,201,000 3,175,000 3,171,000 3,154,000 2,988,000 2,795,000 2,804,000 2,893,000 2,941,000 2,911,000 2,808,000 2,963,000 3,081,000 3,077,000 3,191,000 3,328,000 3,332,000 3,353,000 3,394,000 3,223,000 2,725,000 2,746,000 2,703,000 2,556,000 2,518,000 2,407,000 2,405,000 2,379,000 
          write-off of note receivable
                                                                        
          excess tax benefits from stock options exercised and restricted stock awards vested
                                               -384,000 -745,000 -228,000 235,000 -1,354,000 -1,098,000 -331,000 -228,000 -324,000 -356,000 -341,000 -117,000 -276,000 -109,000 -126,000 -234,000            
          proceeds from called investment
                                                       1,016,000 253,000     356,000            
          unrealized gain on financial derivative asset
                                                                          
          financial derivative asset
                                                                     471,000 532,000    
          proceeds from assets held for sale
                                                                          
          payments of long-term debt
                                                                      -22,000 -23,000 -23,000  
          effects of exchange rate on cash
                                                                          
          repurchases of stock
                                                              -2,484,000 -715,000 -1,180,000  -883,000 -1,036,000 -743,000  -938,000 -15,438,000 -2,001,000  
          net cash (used) provided by financing activities
                                                                          
          foreign currency transaction losses
                                                                          
          adjustments to reconcile net income to net cash
                                                                          
          provided by operating activities:
                                                                          
          excess tax benefits from stock options exercised
                                                                          
          and restricted stock awards vested
                                                                -13,000  -99,000 -67,000 -10,000  11,000 -326,000 -16,000  
          effect of foreign currency loss
                                                                -23,000          
          maturities of certificates of deposit
                                                                 240,000 436,000 827,000      
          proceeds from note receivable
                                                                7,000 6,000 7,000 7,000 7,000      
          investment in certificates of deposit
                                                                     -800,000 80,000 479,000 -2,504,000  
          investments held to maturity
                                                                          
          financial derivative assets
                                                                        526,000  
          deposits on sale of asset held for sale
                                                                          
          net cash from (used) in financing activities
                                                                  2,827,000 -916,000 6,965,000      
          effect of exchange rate on cash
                                                                      77,000 4,000 -2,000  
          cash dividends paid to stockholders*
                                                                          
          other, effect of foreign currency loss
                                                                    -60,000      
          borrowings (payments) of long-term debt
                                                                          
          investments held to maturity at amortized cost
                                                                      1,549,000 -1,274,000 -11,818,000  
          unrealized gain on derivative assets
                                                                         -1,195,000 
          provision for losses on accounts receivable
                                                                          
          proceeds from sale of property, plant, and equipment