7Baggers

NewMarket Corporation
(NYSE:NEU) 

NEU stock logo

NewMarket Corporation, through its subsidiaries, engages in the petroleum additives businesses. The company offers lubricant additives for use in various vehicle and industrial applications, including engine oils, transmission fluids, off-road powertrain and hydraulic systems, gear oils, hydraulic o...

Founded: 1887
Full Time Employees: 2,118
Sector: Basic Materials
Industry: Specialty Chemicals

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Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-10-30 2004-09-30 2004-06-30 
                                                                                             
      net sales
    669,717,000 635,403,000 690,311,000 698,509,000 700,946,000 654,647,000 724,947,000 710,228,000 696,736,000 643,350,000 667,150,000 685,130,000 702,789,000 682,559,000 696,049,000 723,639,000 662,552,000 576,567,000 622,207,000 590,721,000 566,615,000 527,781,000 512,869,000 410,864,000 559,417,000 534,445,000 555,817,000 563,417,000 536,616,000 538,312,000 563,166,000 598,952,000 589,245,000 559,982,000 548,416,000 547,188,000 542,818,000 501,627,000 516,090,000 521,807,000 509,927,000 479,622,000 540,933,000 560,709,000 559,566,000 446,631,750 589,667,000 620,438,000 576,422,000 -1,721,703,645 580,455,000 583,779,000              404,241,000 417,832,000 370,921,000 337,128,000 368,595,000 440,604,000 425,882,000 382,350,000 364,119,000 356,946,000 344,013,000 309,796,000 306,162,000 325,119,000 330,066,000 301,950,000 293,656,000 270,932,000 271,842,000 239,114,000 893,446,052,000 224,668,000 224,668,000 221,510,000 
      yoy
    -4.46% -2.94% -4.78% -1.65% 0.60% 1.76% 8.66% 3.66% -0.86% -5.74% -4.15% -5.32% 6.07% 18.38% 11.87% 22.50% 16.93% 9.24% 21.32% 43.78% 1.29% -1.25% -7.73% -27.08% 4.25% -0.72% -1.30% -5.93% -8.93% -3.87% 2.69% 9.46% 8.55% 11.63% 6.26% 4.86% 6.45% 4.59% -4.59% -6.94% -8.87% 7.39% -8.26% -9.63% -2.92% -125.94% 1.59% 6.28%                  9.67% -5.17% -12.91% -11.83% 1.23% 23.44% 23.80% 23.42% 18.93% 9.79% 4.23% 2.60% 4.26% 20.00% 21.42% 26.28% -99.97% 20.59% 21.00% 7.95%     
      qoq
    5.40% -7.95% -1.17% -0.35% 7.07% -9.70% 2.07% 1.94% 8.30% -3.57% -2.62% -2.51% 2.96% -1.94% -3.81% 9.22% 14.91% -7.34% 5.33% 4.25% 7.36% 2.91% 24.83% -26.55% 4.67% -3.85% -1.35% 4.99% -0.32% -4.41% -5.97% 1.65% 5.23% 2.11% 0.22% 0.81% 8.21% -2.80% -1.10% 2.33% 6.32% -11.33% -3.53% 0.20% 25.29% -24.26% -4.96% 7.64% -133.48% -396.61% -0.57%               -3.25% 12.65% 10.02% -8.54% -16.34% 3.46% 11.39% 5.01% 2.01% 3.76% 11.05% 1.19% -5.83% -1.50% 9.31% 2.82% 8.39% -0.33% 13.69% -99.97% 397573.92% 0.00% 1.43%  
      cost of goods sold
    448,838,000 444,624,000 480,667,000 477,555,000 464,923,000 446,961,000 481,107,000 491,773,000 480,371,000 466,224,000 465,445,000 489,492,000 504,745,000 503,008,000 547,742,000 566,163,000 507,389,000 469,833,000 483,986,000 449,722,000 404,862,000 377,001,000 346,262,000 314,126,000 378,510,000 391,005,000 393,090,000 392,584,000 383,747,000 396,474,000 422,283,000 453,093,000 432,462,000 413,390,000 388,111,000 382,312,000 372,573,000 352,217,000 338,689,000 343,407,000 334,377,000 326,317,000 366,162,000 391,001,000 378,294,000 319,658,000 424,448,000 439,692,000 414,492,000 305,581,500 416,632,000 414,351,000              286,435,000 274,865,000 259,508,000 246,054,000 291,475,000 367,026,000 343,689,000 300,747,000 291,563,000 277,877,000 268,495,000 240,367,000 241,945,000 258,955,000 260,365,000 237,946,000 241,843,000 217,761,000 219,681,000 196,001,000 130,981,500 182,039,000 182,039,000 170,978,000 
      gross profit
    220,879,000 190,779,000 209,644,000 220,954,000 236,023,000 207,686,000 243,840,000 218,455,000 216,365,000 177,126,000 201,705,000 195,638,000 198,044,000 179,551,000 148,307,000 157,476,000 155,163,000 106,734,000 138,221,000 140,999,000 161,753,000 150,780,000 166,607,000 96,738,000 180,907,000 143,440,000 162,727,000 170,833,000 152,869,000 141,838,000 140,883,000 145,859,000 156,783,000 146,592,000 160,305,000 164,876,000 170,245,000 149,410,000 177,401,000 178,400,000 175,550,000 153,305,000 174,771,000 169,708,000 181,272,000 126,973,750 165,219,000 180,746,000 161,930,000 125,414,500 163,823,000 169,428,000 170,197,000 140,536,000 162,059,000 165,399,000 169,536,000 108,489,000 145,196,000 147,796,000 140,964,000 97,132,750 135,922,000 132,201,000 120,408,000 117,806,000 142,967,000 111,413,000 91,074,000 77,120,000 73,578,000 82,193,000 81,603,000 72,556,000 79,069,000 75,518,000 69,429,000 64,217,000 66,164,000 69,701,000 64,004,000 51,813,000 53,171,000 52,161,000 43,113,000 34,755,500 42,629,000 42,629,000 50,532,000 
      yoy
    -6.42% -8.14% -14.02% 1.14% 9.09% 17.25% 20.89% 11.66% 9.25% -1.35% 36.01% 24.23% 27.64% 68.22% 7.30% 11.69% -4.07% -29.21% -17.04% 45.75% -10.59% 5.12% 2.38% -43.37% 18.34% 1.13% 15.51% 17.12% -2.50% -3.24% -12.12% -11.53% -7.91% -1.89% -9.64% -7.58% -3.02% -2.54% 1.50% 5.12% -3.16% 20.74% 5.78% -6.11% 11.94% 1.24% 0.85% 6.68% -4.86% -10.76% 1.09% 2.44% 0.39% 29.54% 11.61% 11.91% 20.27% 11.69% 6.82% 11.80% 17.07% -17.55% -4.93% 18.66% 32.21% 52.76% 94.31% 35.55% 11.61% 6.29% -6.94% 8.84% 17.53% 12.99% 19.50% 8.35% 8.48% 23.94% 24.44% 33.63% 48.46% 49.08% 24.73% 22.36% -14.68%     
      qoq
    15.78% -9.00% -5.12% -6.38% 13.64% -14.83% 11.62% 0.97% 22.15% -12.19% 3.10% -1.21% 10.30% 21.07% -5.82% 1.49% 45.37% -22.78% -1.97% -12.83% 7.28% -9.50% 72.22% -46.53% 26.12% -11.85% -4.74% 11.75% 7.78% 0.68% -3.41% -6.97% 6.95% -8.55% -2.77% -3.15% 13.94% -15.78% -0.56% 1.62% 14.51% -12.28% 2.98% -6.38% 42.76% -23.15% -8.59% 11.62% 29.12% -23.45% -3.31% -0.45% 21.11% -13.28% -2.02% -2.44% 56.27% -25.28% -1.76% 4.85% 45.13% -28.54% 2.81% 9.79% 2.21% -17.60% 28.32% 22.33% 18.09% 4.81% -10.48% 0.72% 12.47% -8.24% 4.70% 8.77% 8.12% -2.94% -5.07% 8.90% 23.53% -2.55% 1.94% 20.99% 24.05% -18.47% 0.00% -15.64%  
      gross margin %
    32.98% 30.02% 30.37% 31.63% 33.67% 31.72% 33.64% 30.76% 31.05% 27.53% 30.23% 28.55% 28.18% 26.31% 21.31% 21.76% 23.42% 18.51% 22.21% 23.87% 28.55% 28.57% 32.49% 23.55% 32.34% 26.84% 29.28% 30.32% 28.49% 26.35% 25.02% 24.35% 26.61% 26.18% 29.23% 30.13% 31.36% 29.79% 34.37% 34.19% 34.43% 31.96% 32.31% 30.27% 32.40% 28.43% 28.02% 29.13% 28.09% -7.28% 28.22% 29.02% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 29.14% 34.22% 30.04% 27.01% 20.92% 16.70% 19.30% 21.34% 19.93% 22.15% 21.95% 22.41% 20.97% 20.35% 21.12% 21.20% 17.64% 19.63% 19.19% 18.03% 0.00% 18.97% 18.97% 22.81% 
      selling, general, and administrative expenses
    46,014,000 49,234,000 43,944,000 45,428,000 42,978,000 42,083,000 42,124,000 42,840,000 44,365,000 36,799,000 37,386,000 37,438,000 39,847,000 35,803,000 35,192,000 38,489,000 35,622,000 34,594,000 39,729,000 34,735,000 36,915,000 37,026,000 34,690,000 35,432,000 35,715,000 38,167,000 38,122,000 35,021,000 36,773,000 31,747,000 37,741,000 41,999,000 40,913,000 43,505,000 42,806,000 38,816,000 39,929,000 40,936,000 38,848,000 40,388,000 40,940,000 43,320,000 38,298,000 40,655,000 41,809,000 30,459,250 41,376,000 40,913,000 39,548,000 30,437,000 40,886,000 39,921,000 40,941,000 39,506,000 37,096,000 40,699,000 36,908,000 27,954,500 36,075,000 37,319,000 38,424,000 25,619,500 35,711,000 36,193,000 30,574,000 31,759,000 27,618,000 29,256,000 26,267,000 28,634,000 28,476,000 30,499,000 28,773,000 29,655,000 27,659,000 27,046,000 26,755,000 29,931,000 27,794,000 26,668,000 24,798,000 25,581,000 24,967,000 23,969,000 22,293,000 18,039,250 23,729,000 23,729,000 24,910,000 
      research, development, and testing expenses
    31,636,000 31,517,000 35,024,000 32,374,000 33,176,000 32,842,000 32,193,000 28,663,000 31,200,000 38,990,000 31,894,000 33,958,000 33,156,000 34,217,000 34,388,000 35,396,000 36,251,000 36,711,000 35,387,000 35,517,000 36,337,000 38,199,000 33,113,000 33,549,000 35,506,000 37,717,000 36,387,000 37,137,000 33,224,000 34,271,000 34,994,000 36,729,000 34,295,000 32,837,000 35,070,000 35,581,000 36,705,000 40,308,000 36,715,000 40,720,000 39,216,000 39,602,000 38,849,000 40,118,000 39,685,000 25,843,250 35,799,000 35,367,000 32,207,000 -103,178,427 35,865,000 36,429,000 31,021,000 31,276,000 30,208,000 28,466,000 27,895,000 28,768,000 26,888,000 25,379,000 24,461,000 25,322,000 22,719,000 22,064,000 21,083,000 24,624,000 21,602,000 21,092,000 18,754,000 20,173,000 19,471,000 21,879,000 20,229,000 20,447,000 18,476,000 19,100,000 18,811,000 19,999,000 16,582,000 17,116,000 16,566,000 17,398,000 15,919,000 15,797,000 16,280,000 65,307,049,000 18,104,000 18,104,000 15,098,000 
      operating profit
    143,229,000 110,028,000 130,676,000 143,152,000 159,869,000 132,761,000 169,523,000 146,952,000 140,800,000 101,337,000 132,425,000 124,242,000 125,041,000 109,531,000 78,727,000 83,591,000 83,290,000 35,429,000 63,105,000 70,747,000 88,501,000 75,555,000 98,804,000 27,757,000 109,686,000 67,556,000 88,218,000 98,675,000 82,872,000 75,820,000 68,148,000 67,131,000 81,575,000 70,250,000 82,429,000 90,479,000 93,611,000 68,166,000 101,838,000 97,292,000 95,394,000 70,383,000 97,624,000 88,935,000 99,778,000 70,671,250 88,044,000 104,466,000 90,175,000 -276,243,155 87,072,000 93,078,000 98,235,000 69,754,000 94,755,000 96,234,000 104,733,000 56,519,000 120,889,000 85,098,000 78,079,000 67,117,000 77,492,000 73,944,000 68,751,000 61,423,000 93,747,000 61,065,000 46,053,000 28,313,000 25,631,000 29,815,000 32,601,000 22,454,000 32,934,000 29,372,000 27,344,000 19,774,000 32,869,000 31,017,000 23,978,000 17,281,000 21,515,000 23,089,000 10,991,000 62,501,902,000 22,905,000 22,905,000 21,287,000 
      yoy
    -10.41% -17.12% -22.92% -2.59% 13.54% 31.01% 28.01% 18.28% 12.60% -7.48% 68.21% 48.63% 50.13% 209.16% 24.76% 18.15% -5.89% -53.11% -36.13% 154.88% -19.31% 11.84% 12.00% -71.87% 32.36% -10.90% 29.45% 46.99% 1.59% 7.93% -17.33% -25.80% -12.86% 3.06% -19.06% -7.00% -1.87% -3.15% 4.32% 9.40% -4.39% -0.41% 10.88% -14.87% 10.65% -125.58% 1.12% 12.23% -8.20% -496.02% -8.11% -3.28% -6.20% 23.42% -21.62% 13.09% 34.14% -15.79% 56.00% 15.08% 13.57% 9.27% -17.34% 21.09% 49.29% 116.94% 265.76% 104.81% 41.26% 26.09% -22.17% 1.51% 19.23% 13.55% 0.20% -5.30% 14.04% 14.43% 52.77% 34.34% 118.16% -99.97% -6.07% 0.80% -48.37%     
      qoq
    30.18% -15.80% -8.72% -10.46% 20.42% -21.69% 15.36% 4.37% 38.94% -23.48% 6.59% -0.64% 14.16% 39.13% -5.82% 0.36% 135.09% -43.86% -10.80% -20.06% 17.13% -23.53% 255.96% -74.69% 62.36% -23.42% -10.60% 19.07% 9.30% 11.26% 1.51% -17.71% 16.12% -14.78% -8.90% -3.35% 37.33% -33.06% 4.67% 1.99% 35.54% -27.90% 9.77% -10.87% 41.19% -19.73% -15.72% 15.85% -132.64% -417.26% -6.45% -5.25% 40.83% -26.38% -1.54% -8.11% 85.31% -53.25% 42.06% 8.99% 16.33% -13.39% 4.80% 7.55% 11.93% -34.48% 53.52% 32.60% 62.66% 10.46% -14.03% -8.55% 45.19% -31.82% 12.13% 7.42% 38.28% -39.84% 5.97% 29.36% 38.75% -19.68% -6.82% 110.07% -99.98% 272774.49% 0.00% 7.60%  
      operating margin %
    21.39% 17.32% 18.93% 20.49% 22.81% 20.28% 23.38% 20.69% 20.21% 15.75% 19.85% 18.13% 17.79% 16.05% 11.31% 11.55% 12.57% 6.14% 10.14% 11.98% 15.62% 14.32% 19.26% 6.76% 19.61% 12.64% 15.87% 17.51% 15.44% 14.08% 12.10% 11.21% 13.84% 12.55% 15.03% 16.54% 17.25% 13.59% 19.73% 18.65% 18.71% 14.67% 18.05% 15.86% 17.83% 15.82% 14.93% 16.84% 15.64% 16.04% 15.00% 15.94% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 15.19% 22.44% 16.46% 13.66% 7.68% 5.82% 7.00% 8.53% 6.17% 9.23% 8.54% 8.83% 6.46% 10.11% 9.40% 7.94% 5.88% 7.94% 8.49% 4.60% 7.00% 10.20% 10.20% 9.61% 
      interest and financing expenses
    8,771,000 9,884,000 8,374,000 10,735,000 10,700,000 11,645,000 14,157,000 15,910,000 15,654,000 7,110,000 9,221,000 10,255,000 10,773,000 10,343,000 8,369,000 7,084,000 9,406,000 9,661,000 9,345,000 8,869,000 6,343,000 5,753,000 6,466,000 7,005,000 7,104,000 6,501,000 6,987,000 7,741,000 8,012,000 8,187,000 7,807,000 5,565,000 5,164,000 5,360,000 5,564,000 5,360,000 5,572,000 4,323,000 4,320,000 3,954,000 4,188,000 3,716,000 3,538,000 3,582,000 3,816,000 3,169,500 4,168,000 4,346,000 4,164,000 -13,596,204 4,259,000 4,573,000 5,109,000 2,317,000 1,632,000 2,384,000 4,482,000 4,685,000 4,797,000 4,693,000 4,645,000 4,533,000 4,465,000 4,314,000 3,949,000 3,012,000 2,909,000 2,859,000 2,936,000 3,192,000 2,966,000 2,873,000 3,015,000 2,814,000 2,954,000 2,827,000 2,962,000 3,714,000 3,917,000 3,866,000 3,906,000 3,929,000 4,138,000 4,455,000 4,327,000 18,240,058,000 4,259,000 4,259,000 4,527,000 
      other income
    17,196,000 13,008,000 13,307,000 15,271,000 14,944,000 13,133,000 13,805,000 11,952,000 12,547,000 10,395,000 11,278,000 10,723,000 10,880,000 9,102,000 9,971,000 9,101,000 7,168,000 4,202,000 7,393,000 5,180,000 7,212,000 6,521,000 25,280,000 6,516,000 7,496,000 5,578,000 6,227,000 5,757,000 5,948,000 3,462,000 7,973,000 7,999,000 4,900,000 52,000 112,000 171,000 194,000 131,000 698,000 -1,266,000 -2,260,000 945,000 -3,400,000 1,683,000 -2,325,000 -1,008,500 385,000 -2,203,000 -2,216,000 -5,500,738 -613,000 5,374,000 747,000 -935,000 81,000  1,773,000       9,210,000 -2,311,000 4,538,000 -3,804,000 -11,850,000 -80,000 111,000 222,000 300,000 379,000 976,000 1,235,000 757,000 390,000 615,000 859,000 5,046,000 597,000 182,000 372,000 131,000 240,000 323,759,000 -208,000 -208,000 283,000 
      income before income tax expense
    151,654,000 113,152,000 135,609,000 147,688,000 164,113,000 134,249,000 169,171,000 142,994,000 137,693,000 104,622,000 134,482,000 124,710,000 125,148,000 108,290,000 80,329,000 85,608,000 73,507,000 29,970,000 61,153,000 67,058,000 89,370,000 76,323,000 117,618,000 27,268,000 110,078,000 66,633,000 87,458,000 96,691,000 80,808,000 71,095,000 68,314,000 69,565,000 81,311,000 64,942,000 76,977,000 85,290,000 88,233,000 63,974,000 98,216,000 92,072,000 88,946,000 67,839,750 90,686,000 87,036,000 93,637,000        93,873,000 67,839,000 93,204,000 81,545,000 98,803,000 63,263,000 103,267,000 76,418,000 73,367,000 47,621,250 67,574,000 60,420,000 62,491,000 44,106,750 87,034,000 46,356,000 43,037,000                     
      income tax expense
    33,587,000 31,867,000 35,340,000 36,444,000 38,164,000 23,510,000 36,849,000 31,374,000 29,961,000 24,212,000 23,235,000 25,086,000 27,565,000 17,768,000 17,103,000 19,136,000 14,189,000 12,764,000 9,115,000 15,106,000 19,658,000 9,439,000 21,824,000 4,919,000 24,537,000 16,531,000 19,653,000 22,517,000 18,603,000 8,292,000 9,833,000 16,680,000 20,746,000 60,870,000 17,205,000 22,562,000 24,296,000 18,302,000 26,767,000 27,683,000 27,015,000 13,698,000 28,677,000 28,303,000 29,690,000 21,193,250 27,348,000 31,153,000 26,272,000 -80,044,036 25,179,000 29,495,000 26,038,000 14,776,000 28,489,000 26,277,000 32,256,000 16,967,000 31,906,000 24,159,000 23,778,000 20,099,000 21,855,000 20,564,000 20,353,000 16,699,000 30,347,000 15,698,000 14,349,000 5,873,000 6,415,000 9,618,000 10,193,000 -6,380,000 11,125,000 9,863,000 8,530,000 1,006,000 10,890,000 11,828,000 6,897,000 2,383,000 4,348,000 5,698,000 2,142,000 11,557,749,000 5,464,000 5,464,000 5,689,000 
      net income
    118,067,000 81,285,000 100,269,000 111,244,000 125,949,000 110,739,000 132,322,000 111,620,000 107,732,000 80,410,000 111,247,000 99,624,000 97,583,000 90,522,000 63,226,000 66,472,000 59,318,000 17,206,000 52,038,000 51,952,000 69,712,000 66,884,000 95,794,000 22,349,000 85,541,000 50,102,000 67,805,000 74,174,000 62,205,000 62,803,000 58,481,000 52,885,000 60,565,000 4,072,000 59,772,000 62,728,000 63,937,000 45,672,000 71,449,000 64,389,000 61,931,000 53,914,000 62,009,000 58,733,000 63,947,000 45,300,000 56,913,000 66,764,000 57,523,000 -210,476,258 78,896,000 64,010,000 67,835,000 53,063,000 64,715,000 55,268,000 66,547,000 33,698,000 71,361,000 52,259,000 49,589,000 49,412,000 45,719,000 39,856,000 42,138,000 46,250,000 56,687,000 30,658,000 28,688,000 19,359,000 16,472,000 17,624,000 19,772,000 26,996,000 21,157,000 30,926,000 16,242,000 4,460,000 18,921,000 20,369,000 13,772,000 11,151,000 13,401,000 13,067,000 4,762,000 33,027,854,000 12,974,000 12,974,000 11,354,000 
      yoy
    -6.26% -26.60% -24.22% -0.34% 16.91% 37.72% 18.94% 12.04% 10.40% -11.17% 75.95% 49.87% 64.51% 426.11% 21.50% 27.95% -14.91% -74.27% -45.68% 132.46% -18.50% 33.50% 41.28% -69.87% 37.51% -20.22% 15.94% 40.26% 2.71% 1442.31% -2.16% -15.69% -5.27% -91.08% -16.34% -2.58% 3.24% -15.29% 15.22% 9.63% -3.15% 19.02% 8.95% -12.03% 11.17% -121.52% -27.86% 4.30% -15.20% -496.65% 21.91% 15.82% 1.94% 57.47% -9.31% 5.76% 34.20% -31.80% 56.09% 31.12% 17.68% 6.84% -19.35% 30.00% 46.88% 138.91% 244.14% 73.96% 45.09% -28.29% -22.14% -43.01% 21.73% 505.29% 11.82% 51.83% 17.93% -60.00% 41.19% 55.88% 189.21% -99.97% 3.29% 0.72% -58.06%     
      qoq
    45.25% -18.93% -9.87% -11.68% 13.73% -16.31% 18.55% 3.61% 33.98% -27.72% 11.67% 2.09% 7.80% 43.17% -4.88% 12.06% 244.75% -66.94% 0.17% -25.48% 4.23% -30.18% 328.63% -73.87% 70.73% -26.11% -8.59% 19.24% -0.95% 7.39% 10.58% -12.68% 1387.35% -93.19% -4.71% -1.89% 39.99% -36.08% 10.96% 3.97% 14.87% -13.05% 5.58% -8.15% 41.16% -20.40% -14.75% 16.06% -127.33% -366.78% 23.26% -5.64% 27.84% -18.01% 17.09% -16.95% 97.48% -52.78% 36.55% 5.38% 0.36% 8.08% 14.71% -5.42% -8.89% -18.41% 84.90% 6.87% 48.19% 17.53% -6.54% -10.86% -26.76% 27.60% -31.59% 90.41% 264.17% -76.43% -7.11% 47.90% 23.50% -16.79% 2.56% 174.40% -99.99% 254469.55% 0.00% 14.27%  
      net income margin %
    17.63% 12.79% 14.53% 15.93% 17.97% 16.92% 18.25% 15.72% 15.46% 12.50% 16.67% 14.54% 13.89% 13.26% 9.08% 9.19% 8.95% 2.98% 8.36% 8.79% 12.30% 12.67% 18.68% 5.44% 15.29% 9.37% 12.20% 13.17% 11.59% 11.67% 10.38% 8.83% 10.28% 0.73% 10.90% 11.46% 11.78% 9.10% 13.84% 12.34% 12.15% 11.24% 11.46% 10.47% 11.43% 10.14% 9.65% 10.76% 9.98% 12.22% 13.59% 10.96% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 11.44% 13.57% 8.27% 8.51% 5.25% 3.74% 4.14% 5.17% 7.41% 5.93% 8.99% 5.24% 1.46% 5.82% 6.17% 4.56% 3.80% 4.95% 4.81% 1.99% 3.70% 5.77% 5.77% 5.13% 
      earnings per share - basic and diluted
    12.62 8.66 10.67 11.84 13.26 11.56 13.79 11.63 11.23 8.39 11.6 10.36 10.09 9.17 6.32 6.54 5.75 1.77 4.8 4.75 6.38 6.12 8.77 2.05 7.67 4.47 6.06 6.63 5.57 5.56 5.12 4.53 5.14 0.35 5.04 5.29 5.39 3.86 6.03 5.43 5.22 3.735 5.08 4.72 5.14        5.07                                     
      cash dividends declared per share
    2.063 2.75 2.75 2.75 1.875 2.5 2.5 2.5 1.65 2.25 2.25 2.1 1.575 2.1 2.1 2.1 1.475 2.1 1.9 1.9 1.425 1.9 1.9 1.9 1.35 1.9 1.75 1.75 1.313 1.75 1.75 1.75 1.313 1.75 1.75 1.75 1.2 1.6 1.6 1.6 1.05 1.4 1.4 1.4                                             
      loss on early extinguishment of debt
                    7,545,000                                       6,711,000 3,221,000                                 
      income from continuing operations before income tax expense
                                                 66,493,250 84,261,000 97,917,000 83,795,000 -268,147,689 82,200,000 93,879,000                                      
      income from continuing operations
                                                 45,300,000 56,913,000 66,764,000 57,523,000 -188,103,653 57,021,000 64,384,000                  19,359,000 16,472,000 17,624,000 19,772,000 26,996,000 20,090,000 17,439,000          7,536,500 12,974,000 12,974,000 11,354,000 
      discontinued operations:
                                                                                             
      gain on sale of discontinued business, net of tax
                                                     5,463,750 21,855,000                                       
      income from operations of discontinued business, net of tax
                                                     135,000 20,000 -374,000                                      
      earnings per share - basic and diluted:
                                                                                             
      income from discontinued operations
                                                     0.01 1.65                                       
      cash dividends declared per common share
                                                 0.825 1.1 1.1 1.1 0.675 0.9 0.9 0.9 0.563 0.75 0.75 0.75 0.41 0.6 0.6 0.44 0.281 0.375 0.375 0.375 0.175 0.25 0.25 0.2 0.15 0.2 0.2 0.2 0.094 0.125 0.125 0.125 0.094 0.125 0.125 0.125         
      revenue:
                                                                                             
      net sales - product
                                                        559,750,000 513,322,000 551,187,000 587,548,000 559,821,000 408,857,250 554,539,000 575,665,000 505,225,000 332,042,500 468,919,000 466,986,000 392,265,000                         
      rental revenue
                                                        2,858,000 2,858,000 2,857,000 2,858,000 2,858,000 2,143,250 2,857,000 2,858,000 2,858,000 2,143,500 2,858,000 2,855,000 2,861,000                         
      costs:
                                                                                             
      cost of goods sold - product
                                                        391,343,000 374,461,000 390,918,000 423,939,000 392,075,000 301,710,750 411,133,000 429,659,000 366,051,000 236,242,000 334,766,000 336,574,000 273,628,000                         
      cost of rental
                                                        1,068,000 1,183,000 1,067,000 1,068,000 1,068,000 800,750 1,067,000 1,068,000 1,068,000 811,250 1,089,000 1,066,000 1,090,000                         
      revenue: - sum
                                                         516,180,000 554,044,000                                   
      costs: - sum
                                                         375,644,000 391,985,000                                   
      gain on legal settlement
                                                             9,664,000 38,656,000                               
      basic earnings per share
                                                         3.94 4.83 4.12 4.96 3.135 5.22 3.77 3.57 2.165 3.19 2.69 2.79 1.908 3.73 2.02 1.89        0.94 0.26 1.1 1.18 0.8 0.46 0.79 0.77 0.28 0.445 0.76 0.76 0.67 
      diluted earnings per share
                                                         3.94 4.83 4.12 4.96 3.135 5.22 3.77 3.57 2.16 3.18 2.69 2.78 1.903 3.72 2.01 1.88        0.93 0.25 1.09 1.17 0.79 0.45 0.77 0.76 0.28 0.44 0.75 0.75 0.66 
      shares used to compute basic earnings per share
                                                         3,351.25 13,406 13,405 13,405 -100 13,680 13,852 13,890 -137 14,353 14,796 15,118 15,208 15,204 15,203 -56 15,306 15,488 15,459 -280 16,772 17,296 17,294 19 17,257 17,232 17,122 15 17,042 17,016 16,982 21 16,969 16,969 16,904 
      shares used to compute diluted earnings per share
                                                         3,351.25 13,406 13,405 13,405 -102 13,680 13,856 13,906 -138 14,383 14,828 15,154  15,245 15,242 15,241 -63 15,365 15,556 15,558 -279 16,887 17,411 17,412 17,409 17,411 17,394 17,317 17,305 17,314 40 17,189 17,189 17,168 
      other expense
                                                           5,594,000  4,219,750 12,825,000 3,987,000 67,000 4,243,500 5,453,000                           
      income from continuing operations before income taxes
                                                                         25,232,000 22,887,000 27,242,000 29,965,000 20,616,000 31,215,000 27,302,000          11,099,250 18,438,000 18,438,000 17,043,000 
      gain on settlement of discontinued business
                                                                              1,067,000 13,487,000              
      income from operations of discontinued business
                                                                                             
      discontinued operations
                                                                             0.02 0.06 0.78              
      special items income
                                                                                 2,773,250 7,843,000   1,686,500 2,878,000       
      special item income
                                                                                   3,250,000    3,868,000  3,311,250 13,245,000 13,245,000  
      operating profit from tel marketing agreements services
                                                                                3,481,000 1,755,000 3,238,000 1,850,000 1,338,000 3,525,000 6,352,000 6,826,000 6,451,000     
      income before income taxes
                                                                                24,772,000 5,466,000 29,811,000 32,197,000 20,669,000 10,854,500 17,749,000 18,765,000 6,904,000     
      tel marketing agreements services
                                                                                         6,734,750 8,864,000 8,864,000 10,763,000 
      gain on disposal of business
                                                                                             
      income before cumulative effect of accounting change
                                                                                         7,536,500 12,974,000 12,974,000 11,354,000 
      cumulative effect of accounting change
                                                                                             
      basic earnings per share:
                                                                                             
      earnings from continuing operations
                                                                                         0.17 0.76 0.76 0.67 
      diluted earnings per share:
                                                                                             
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-10-30 2004-09-30 2004-06-30 
                                                                                               
        assets
                                                                                               
        current assets:
                                                                                               
        cash and cash equivalents
      73,158,000 77,598,000 102,455,000 70,257,000 118,253,000 77,476,000 80,310,000 87,632,000 117,066,000 111,936,000 102,560,000 130,923,000 70,115,000 68,712,000 71,972,000 79,491,000 84,550,000 83,304,000 59,613,000 153,864,000 522,405,000 125,172,000 117,701,000 102,064,000 178,662,000 144,397,000 79,971,000 73,219,000 78,247,000 73,040,000 147,935,000 109,789,000 72,830,000 84,166,000 104,996,000 278,035,000 251,244,000 192,154,000 187,908,000 158,136,000 122,256,000 93,424,000 110,327,000 126,172,000 119,243,000 103,003,000 141,536,000 113,644,000 146,657,000 238,703,000 247,265,000 73,545,000 64,013,000 89,129,000 79,707,000 49,355,000 72,746,000 50,370,000 54,462,000 60,888,000 49,803,000 49,192,000 50,283,000 46,606,000 87,971,000 151,831,000 133,770,000 112,048,000 59,510,000 21,761,000 33,491,000 39,792,000 48,030,000 71,872,000 82,947,000 108,365,000 72,901,000 60,300,000 86,670,000 63,872,000 56,465,000 56,413,000 40,305,000 31,453,000 25,380,000 28,778,000 29,486,000 29,486,000 21,958,000 
        trade and other accounts receivable, less allowance for credit losses
      438,438,000  438,789,000 453,709,000 463,337,000  487,607,000 495,516,000 464,687,000  427,764,000 436,250,000 457,203,000  476,061,000 515,002,000 464,510,000  414,847,000 399,373,000 373,655,000  328,677,000 297,862,000 347,155,000                                                                 
        inventories
      494,957,000 502,257,000 512,168,000 494,849,000 489,759,000 505,426,000 534,462,000 492,638,000 493,554,000 456,234,000 503,411,000 537,380,000 566,136,000 631,383,000 592,222,000 530,186,000 524,091,000 498,539,000 479,039,000 457,957,000 414,737,000 401,031,000 370,104,000 354,821,000 371,002,000 365,938,000 370,934,000 376,481,000 395,660,000 396,341,000    383,097,000    311,512,000    351,631,000    348,420,000    307,518,000    322,674,000    306,785,000    273,215,000    192,903,000    201,072,000    193,694,000    185,581,000    151,999,000    157,789,000    
        prepaid expenses and other current assets
      58,217,000 57,773,000 47,731,000 49,001,000 52,415,000 51,203,000 35,250,000 39,455,000 44,013,000 39,051,000 31,859,000 35,550,000 38,107,000 38,338,000 33,847,000 36,282,000 41,183,000 38,633,000 34,459,000 35,982,000 41,670,000 35,480,000 37,880,000 35,277,000 34,115,000 33,237,000 35,276,000 30,524,000 30,834,000 29,179,000 30,343,000 31,343,000 32,401,000 31,074,000 33,853,000 28,756,000 28,625,000 26,301,000 29,785,000 31,142,000 34,493,000 35,370,000 35,236,000 36,329,000 37,873,000 35,128,000 34,871,000 36,029,000 37,320,000 32,984,000 33,538,000 33,059,000 34,256,000 18,185,000 34,307,000 39,667,000 39,932,000 36,983,000 35,578,000 21,069,000 15,202,000 15,444,000 17,959,000 24,924,000 35,660,000 39,100,000 9,141,000 8,252,000 8,797,000 5,704,000 7,465,000 4,874,000                  
        total current assets
      1,064,770,000 1,059,712,000 1,101,143,000 1,067,816,000 1,123,764,000 1,029,555,000 1,137,629,000 1,115,241,000 1,119,320,000 1,039,570,000 1,065,594,000 1,140,103,000 1,131,561,000 1,192,125,000 1,174,102,000 1,160,961,000 1,114,334,000 1,388,173,000 1,366,860,000 1,423,471,000 1,352,467,000 898,078,000 854,362,000 790,024,000 930,934,000 879,398,000 826,933,000 829,434,000 856,146,000 813,420,000 915,167,000 892,839,000 886,490,000 833,654,000 847,776,000 995,315,000 941,940,000 836,883,000 849,147,000 796,652,000 773,791,000 774,767,000 804,041,000 817,445,000 811,351,000 797,191,000 844,142,000 833,032,000 853,795,000 897,319,000 926,077,000 856,618,000 758,214,000 735,495,000 762,529,000 734,293,000 745,001,000 679,731,000 717,170,000 729,298,000 657,611,000 602,775,000 602,129,000 550,306,000 544,808,000 603,139,000 582,948,000 514,390,000 435,455,000 446,178,000 529,254,000 528,755,000 511,980,000 495,041,000 511,225,000 517,256,000 460,516,000 461,960,000 473,605,000 439,712,000 416,575,000 411,699,000 377,324,000 384,356,000 364,746,000 360,255,000 340,222,000 340,222,000 318,029,000 
        property, plant, and equipment
      780,618,000 775,480,000 739,742,000 739,182,000 734,580,000 735,361,000 755,409,000 759,357,000 761,685,000 654,747,000 649,968,000 655,864,000 658,092,000 659,998,000 653,231,000 663,462,000 671,327,000 676,770,000 677,481,000 680,315,000 671,955,000 665,147,000 648,685,000 639,344,000 633,873,000 635,439,000 623,961,000 629,724,000 633,009,000 644,138,000                                                            
        intangibles (net of amortization) and goodwill
      932,415,000 941,156,000 731,463,000 737,873,000 744,126,000 750,424,000 757,060,000 763,467,000 768,918,000 124,642,000 124,620,000 125,424,000 125,754,000 126,069,000 126,323,000 126,842,000 127,356,000 127,752,000 128,125,000 128,531,000 129,248,000 129,944,000 130,423,000 130,903,000 131,012,000 131,880,000 132,822,000 133,945,000 135,059,000 136,039,000 137,533,000 139,179,000 142,137,000 144,337,000 147,094,000 10,217,000 10,314,000 10,436,000 8,835,000 9,242,000 9,762,000 10,907,000 12,411,000 14,035,000 15,260,000 16,859,000 18,538,000 20,338,000 21,787,000 23,319,000 24,789,000 26,487,000 28,378,000 30,542,000 32,423,000 34,031,000 36,355,000 38,047,000 40,291,000 42,623,000 44,358,000 46,526,000 48,706,000                           
        prepaid pension cost
      594,107,000 586,053,000 527,147,000 518,818,000 503,042,000 490,418,000 390,018,000 385,363,000 377,941,000 370,882,000 323,055,000 318,765,000 310,753,000 302,584,000 254,695,000 248,575,000 245,751,000 242,604,000 139,760,000 141,151,000 139,104,000 137,069,000 145,450,000 139,481,000 136,346,000 133,848,000 100,758,000 94,853,000 92,208,000 88,705,000 125,618,000 77,731,000 73,241,000 66,495,000 41,222,000 36,994,000 31,021,000 25,800,000 29,135,000 26,538,000 23,025,000 20,430,000 21,009,000 19,355,000 16,693,000 16,082,000 65,812,000 61,882,000 58,254,000 55,087,000 17,371,000 14,411,000 12,800,000 12,710,000 14,538,000 13,002,000 12,596,000 11,494,000 14,410,000 12,578,000 10,734,000 8,597,000 5,522,000 4,085,000 3,228,000 2,430,000 36,000 28,000 21,000 159,000 6,276,000 5,205,000 3,737,000 2,616,000 1,298,000 1,305,000 103,000 85,000 17,663,000 17,253,000 17,268,000 18,316,000 18,808,000 17,830,000 18,895,000 20,101,000 20,914,000 20,914,000 21,858,000 
        operating lease right-of-use assets
      80,480,000 78,267,000 78,868,000 76,247,000 75,197,000 71,253,000 73,123,000 73,867,000 76,186,000 70,823,000 64,272,000 62,381,000 60,350,000 62,417,000 64,213,000 66,821,000 69,294,000 68,402,000 67,586,000 64,980,000 65,307,000 61,329,000 58,420,000 55,935,000 57,437,000 60,505,000 58,377,000 55,739,000 57,758,000                                                             
        deferred charges and other assets
      51,918,000 51,797,000 55,827,000 54,593,000 52,215,000 52,530,000 53,045,000 52,776,000 53,449,000 48,207,000 62,886,000 63,607,000 64,261,000 63,625,000 64,280,000 64,010,000 53,491,000 54,735,000 57,404,000 40,264,000 41,308,000 42,308,000 42,782,000 43,450,000 44,083,000 37,735,000 23,171,000 18,251,000 18,967,000 9,878,000 10,174,000 10,495,000 10,812,000 11,038,000 11,362,000 9,834,000 10,322,000 10,509,000 9,465,000 39,448,000 37,891,000 43,011,000 43,694,000 42,809,000 45,252,000 45,435,000 41,466,000 44,921,000 42,832,000 43,552,000                                        
        total assets
      3,504,308,000 3,492,465,000 3,234,190,000 3,194,529,000 3,232,924,000 3,129,541,000 3,166,284,000 3,150,071,000 3,157,499,000 2,308,871,000 2,290,395,000 2,366,144,000 2,350,771,000 2,406,818,000 2,336,844,000 2,330,671,000 2,281,553,000 2,558,436,000 2,437,216,000 2,478,712,000 2,399,389,000 1,933,875,000 1,880,122,000 1,799,137,000 1,933,685,000 1,885,132,000 1,770,995,000 1,766,985,000 1,798,191,000 1,697,274,000 1,839,927,000 1,773,830,000 1,779,465,000 1,712,154,000 1,705,193,000 1,636,783,000 1,557,785,000 1,416,436,000 1,403,385,000 1,358,282,000 1,317,440,000 1,289,915,000 1,288,980,000 1,291,117,000 1,257,670,000 1,231,925,000 1,288,318,000 1,272,350,000 1,283,228,000 1,327,274,000 1,345,238,000 1,276,879,000 1,281,389,000 1,257,510,000 1,267,214,000 1,240,217,000 1,253,497,000 1,191,662,000 1,212,834,000 1,208,626,000 1,131,667,000 1,062,741,000 1,079,357,000 1,020,202,000 1,014,831,000 1,025,192,000 1,005,141,000 915,958,000 816,141,000 811,452,000 863,025,000 830,628,000 800,514,000 770,934,000 777,769,000 786,789,000 749,741,000 744,793,000 752,578,000 722,394,000 702,617,000 701,532,000 674,879,000 682,545,000 668,127,000 676,195,000 665,825,000 665,825,000 644,687,000 
        liabilities and shareholders’ equity
                                                                                               
        current liabilities:
                                                                                              56,392,000 
        accounts payable
      258,710,000 238,384,000 265,778,000 260,486,000 249,757,000 225,874,000 259,434,000 270,789,000 260,451,000 231,137,000 215,108,000 222,969,000 212,277,000 273,289,000 285,475,000 320,930,000 290,846,000 246,097,000 250,658,000 259,209,000 218,211,000 189,937,000 187,572,000 127,401,000 178,457,000 178,773,000 154,650,000 164,956,000 135,473,000 151,631,000 152,624,000 143,918,000 162,651,000 159,408,000 158,683,000 157,531,000 153,515,000 141,869,000 127,953,000 135,639,000 112,966,000 128,745,000 126,266,000 132,204,000 136,325,000 137,688,000 128,834,000 137,479,000 128,083,000 134,132,000 126,874,000 132,184,000 115,675,000 119,298,000 116,494,000 119,525,000 119,608,000 103,217,000 97,065,000 127,163,000 116,279,000 109,250,000 113,300,000 108,370,000 87,025,000 88,186,000 100,447,000 87,251,000 80,636,000 60,505,000 127,429,000 127,590,000 118,608,000 104,636,000 96,948,000 84,623,000 83,618,000 81,623,000 83,249,000 84,636,000 87,391,000 88,350,000 71,257,000 70,898,000 71,649,000 75,719,000 71,183,000 71,183,000 40,487,000 
        accrued expenses
      94,821,000 109,774,000 83,228,000 77,568,000 70,463,000 89,277,000 82,364,000 85,114,000 72,668,000 76,546,000 72,301,000 72,923,000 72,336,000 89,508,000 85,549,000 76,177,000 73,401,000 85,103,000 86,677,000 69,185,000 73,264,000 78,422,000 74,797,000 62,004,000 89,819,000 77,350,000 75,928,000 70,016,000 78,231,000 91,202,000 94,235,000 94,635,000 91,457,000 107,999,000 105,450,000 88,719,000 93,711,000 104,082,000 93,621,000 80,303,000 88,907,000 99,511,000 94,082,000 89,761,000 78,661,000 86,539,000 87,865,000 73,006,000 66,047,000 77,992,000 79,680,000 70,971,000 65,549,000 79,061,000 71,652,000 69,309,000 65,383,000 78,546,000 89,143,000 64,675,000 60,045,000 71,558,000 67,796,000 60,748,000 56,571,000 63,775,000 66,992,000 59,230,000 55,733,000 63,715,000 62,989,000 51,933,000 48,494,000 57,043,000 55,264,000 50,904,000 47,809,000 59,692,000 59,823,000 54,215,000 51,285,000 58,847,000 57,126,000 44,997,000 46,123,000 52,710,000 48,972,000 48,972,000 582,000 
        dividends payable
      24,679,000 23,805,000 21,573,000 21,460,000 21,698,000 22,037,000 21,419,000 21,410,000 21,365,000 19,212,000 18,894,000 18,898,000 17,861,000 17,850,000 19,357,000 16,555,000 16,418,000 16,648,000 20,600,000 18,613,000 18,612,000 15,184,000 18,444,000 18,530,000 19,020,000 19,217,000 19,441,000 17,884,000 17,880,000 17,923,000 18,257,000 18,523,000 18,997,000 19,055,000 19,129,000 19,125,000 19,117,000 17,478,000 17,460,000 17,449,000 17,389,000 17,594,000 15,396,000 16,013,000 15,738,000 15,721,000 12,446,000 12,578,000 12,765,000 12,996,000 10,740,000 10,778,000 10,282,000  8,580,000 8,563,000 8,521,000 8,529,000 6,903,000 7,108,000 5,189,000 5,304,000 4,662,000 4,692,000 4,936,000 4,992,000 3,319,000 3,416,000 2,740,000 2,646,000 2,667,000 2,807,000 2,802,000 3,154,000 2,023,000 2,162,000 2,162,000 2,162,000 2,167,000 2,157,000 2,148,000         
        income taxes payable
      18,426,000 17,190,000 18,529,000 18,647,000 32,261,000 15,798,000 17,011,000 15,097,000 15,403,000 6,131,000 6,058,000 8,522,000 35,248,000 16,109,000 10,887,000 9,677,000 7,781,000 4,442,000 5,202,000 5,242,000 5,949,000 3,760,000 5,362,000 3,508,000 7,460,000 10,632,000 12,348,000 11,481,000 10,382,000 6,431,000 10,866,000 11,722,000 17,207,000 16,340,000 18,336,000 12,969,000 16,348,000 17,573,000 17,388,000 17,596,000 15,678,000 12,773,000 11,553,000 9,561,000 21,237,000 6,462,000 8,339,000 11,972,000 16,284,000 11,419,000 33,377,000 14,289,000 25,294,000 10,024,000 15,845,000 13,428,000 28,931,000 13,086,000 29,429,000 29,446,000 26,500,000 14,843,000 10,919,000 10,274,000 16,163,000 4,988,000 22,341,000 25,976,000 12,280,000 7,264,000 5,168,000 3,209,000 8,689,000 5,843,000 14,931,000 10,392,000 12,879,000 13,466,000 14,305,000 8,335,000 11,514,000 14,728,000 14,177,000 8,434,000 6,048,000 6,138,000 10,253,000 10,253,000 106,553,000 
        operating lease liabilities
      16,141,000 16,205,000 16,908,000 17,170,000 16,303,000 15,337,000 15,683,000 14,866,000 15,505,000 15,074,000 13,963,000 14,525,000 14,948,000 15,569,000 15,742,000 16,018,000 16,174,000 15,709,000 15,231,000 14,460,000 14,307,000 13,410,000 13,270,000 12,592,000 13,060,000 14,036,000 13,811,000 13,537,000 13,484,000                                                             
        other current liabilities
      4,478,000 13,921,000 4,471,000 6,741,000 5,775,000 6,155,000 6,042,000 12,240,000 5,402,000 16,064,000 5,880,000 11,201,000 5,826,000 11,562,000 9,125,000 7,277,000 7,079,000 7,654,000 13,029,000 5,416,000 5,510,000 11,742,000 9,454,000 9,948,000 5,096,000 8,887,000 4,300,000 5,605,000 4,523,000 4,114,000 3,263,000 11,221,000 12,715,000 13,991,000 7,832,000 12,138,000 9,912,000 13,588,000 11,671,000 7,024,000 5,165,000 5,057,000 10,460,000 5,715,000 5,173,000 13,264,000 13,097,000 11,023,000 7,854,000 11,075,000                                        
        total current liabilities
      417,255,000 419,279,000 410,487,000 402,072,000 396,257,000 374,478,000 401,953,000 419,516,000 390,794,000 364,164,000 332,204,000 349,038,000 358,496,000 423,887,000 426,135,000 446,634,000 411,699,000 725,087,000 391,397,000 372,125,000 335,853,000 312,455,000 308,899,000 233,983,000 312,912,000 308,895,000 280,478,000 283,479,000 259,973,000 271,301,000 279,245,000 280,019,000 303,027,000 316,793,000 309,430,000 290,482,000 292,603,000 294,590,000 268,093,000 258,011,000 240,105,000 263,680,000 257,757,000 253,254,000 257,134,000 259,674,000 250,581,000 246,058,000 231,033,000 247,614,000 263,416,000 245,422,000 227,142,000 216,671,000 225,446,000 215,413,000 240,953,000 216,024,000 238,412,000 243,322,000 215,272,000 206,387,000 202,372,000 191,078,000 171,046,000 198,052,000 282,050,000 179,092,000 154,711,000 135,913,000 203,636,000 190,338,000 183,676,000 177,661,000 173,415,000 157,449,000 150,538,000 160,183,000 164,481,000 154,117,000 156,574,000 166,787,000 147,851,000 131,120,000 127,164,000 140,183,000 130,999,000 130,999,000 204,147,000 
        long-term debt
      939,612,000 883,391,000 783,104,000 841,829,000 990,555,000 971,281,000 1,085,006,000 1,172,732,000 1,279,457,000 643,622,000 779,401,000 916,179,000 957,958,000 1,003,737,000 1,008,516,000 911,295,000 841,074,000 789,853,000 991,919,000 990,551,000 990,189,000 598,848,000 608,702,000 690,292,000 740,511,000 642,941,000 639,983,000 678,803,000 782,024,000 770,999,000 818,477,000 759,843,000 624,894,000 602,900,000 611,687,000 627,976,000 601,413,000 507,275,000 531,404,000 521,264,000 541,124,000 494,586,000 507,571,000 361,556,000 373,541,000 363,526,000 384,512,000 353,497,000 355,482,000 349,467,000 349,452,000 364,437,000 425,422,000 424,407,000 138,000,000 188,000,000 209,831,000 232,601,000 266,358,000 260,100,000 253,829,000 217,544,000 234,246,000 232,935,000 215,611,000 216,200,000 150,358,000 218,200,000 200,820,000 236,378,000 213,361,000 172,522,000 162,216,000 157,061,000 156,886,000 152,136,000 152,319,000 152,748,000 152,675,000 152,849,000 153,020,000 153,189,000 153,355,000 187,518,000 186,179,000 183,837,000 186,993,000 186,993,000 118,476,000 
        operating lease liabilities - noncurrent
      64,054,000 62,045,000 61,928,000   54,754,000    55,058,000    46,968,000    52,591,000    48,324,000    46,792,000                                                                
        other noncurrent liabilities
      350,837,000 349,507,000 288,275,000 279,528,000 268,516,000 267,445,000 257,422,000 264,466,000 275,247,000 168,966,000 157,754,000 160,472,000 166,929,000 169,819,000 186,917,000 200,939,000 215,594,000 228,776,000 228,808,000 216,337,000 212,064,000 214,424,000 193,991,000 196,635,000 197,428,000 203,406,000 176,798,000 173,370,000 174,067,000 165,067,000 178,133,000 181,487,000 196,759,000 190,812,000 155,626,000 134,620,000 132,754,000 131,320,000 126,925,000 146,793,000 145,063,000 144,085,000 147,471,000 179,918,000 184,105,000 187,684,000 158,708,000 159,298,000 160,228,000 157,745,000 193,284,000 200,575,000 210,256,000 214,227,000 186,481,000 186,514,000 188,542,000 193,444,000 151,497,000 142,516,000 141,764,000 147,170,000 164,112,000 158,181,000 154,457,000 152,755,000 160,283,000 159,002,000 146,942,000 148,038,000 114,759,000 120,615,000 123,627,000 119,205,000 127,124,000 128,925,000 129,440,000 130,460,000 116,778,000 115,706,000 113,691,000 115,496,000 114,909,000 117,591,000 119,261,000 120,293,000 118,599,000 118,599,000  
        total liabilities
      1,771,758,000 1,714,222,000 1,543,794,000 1,582,806,000 1,713,428,000 1,667,958,000 1,801,998,000 1,914,723,000 2,005,211,000 1,231,810,000 1,318,452,000 1,473,404,000 1,528,971,000 1,644,411,000 1,669,468,000 1,609,336,000 1,521,463,000 1,796,307,000 1,664,443,000 1,629,502,000 1,589,034,000 1,174,051,000 1,156,596,000 1,163,852,000 1,294,436,000 1,202,034,000 1,141,657,000 1,177,809,000 1,259,995,000 1,207,367,000 1,275,855,000 1,221,349,000 1,124,680,000 1,110,505,000 1,076,743,000 1,053,078,000 1,026,770,000 933,185,000 926,422,000 926,068,000 926,292,000 902,351,000 912,799,000 794,728,000 814,780,000 810,884,000 793,801,000 758,853,000 746,743,000 754,826,000 806,152,000 810,434,000 862,820,000                                     
        commitments and contingencies
                                                                                               
        shareholders’ equity:
                                                                                               
        common shares, ...
       2,386,000 1,614,000 515,000   3,201,000 2,052,000 1,406,000 2,130,000 1,557,000         1,748,000 1,190,000 717,000 287,000 281,000  1,965,000 1,914,000 949,000 431,000    36,000  3,999,000 2,961,000 2,220,000 1,603,000 2,096,000 1,109,000 428,000    426,000       139,000  721,000 404,000 64,000 64,000 64,000        275,000 266,000 137,000 137,000 115,000  1,131,000 864,000 5,235,000 38,389,000 88,290,000 88,290,000 88,263,000 87,379,000 86,522,000 86,200,000 85,162,000 85,077,000 84,951,000 84,728,000 84,724,000 84,688,000 84,688,000 84,650,000 
        accumulated other comprehensive income
      98,491,000 106,823,000 72,842,000 69,702,000 43,896,000 32,870,000                                                                                    
        retained earnings
      1,634,059,000 1,669,034,000 1,615,940,000 1,541,506,000 1,475,600,000 1,428,713,000 1,375,729,000 1,267,393,000 1,179,756,000 1,096,002,000 1,037,168,000 947,497,000 883,351,000 834,402,000 816,005,000 835,748,000 845,360,000 844,356,000 945,147,000 1,012,409,000 981,220,000 932,271,000 886,137,000 811,656,000 815,592,000 843,881,000 815,035,000 768,490,000 713,895,000 671,223,000 712,525,000 697,423,000 787,440,000 747,643,000 788,371,000 749,341,000 707,354,000 664,158,000 637,438,000 584,943,000 539,507,000 532,090,000 514,047,000 639,987,000 605,931,000 560,201,000 561,449,000 562,304,000 594,840,000 632,534,000 647,468,000 594,301,000 545,950,000 512,173,000 804,620,000 749,969,000 704,754,000 648,261,000 624,617,000 625,832,000 584,869,000 565,460,000 555,458,000 524,727,000 555,194,000 532,694,000 492,147,000 439,262,000 412,405,000 386,758,000 370,439,000 375,757,000 361,232,000 346,132,000 322,283,000 303,148,000 274,384,000 260,304,000 257,999,000 241,245,000 223,033,000 211,409,000 200,258,000 186,857,000 173,790,000 169,028,000 166,116,000 166,116,000 153,142,000 
        total shareholders’ equity
      1,732,550,000  1,690,396,000 1,611,723,000 1,519,496,000  1,364,286,000                                                                                   
        total liabilities and shareholders’ equity
      3,504,308,000  3,234,190,000 3,194,529,000 3,232,924,000  3,166,284,000 3,150,071,000 3,157,499,000  2,290,395,000 2,366,144,000 2,350,771,000  2,336,844,000 2,330,671,000 2,281,553,000  2,437,216,000 2,478,712,000 2,399,389,000  1,880,122,000 1,799,137,000 1,933,685,000  1,770,995,000 1,766,985,000 1,798,191,000  1,839,927,000 1,773,830,000 1,779,465,000  1,705,193,000 1,636,783,000 1,557,785,000  1,403,385,000 1,358,282,000 1,317,440,000  1,288,980,000 1,291,117,000 1,257,670,000  1,288,318,000 1,272,350,000 1,283,228,000  1,345,238,000 1,276,879,000 1,281,389,000  1,267,214,000 1,240,217,000 1,253,497,000 1,191,662,000 1,212,834,000 1,208,626,000 1,131,667,000 1,062,741,000 1,079,357,000 1,020,202,000  1,025,192,000 1,005,141,000 915,958,000 816,141,000 811,452,000 863,025,000 830,628,000  770,934,000 777,769,000 786,789,000 749,741,000 744,793,000 752,578,000 722,394,000 702,617,000 701,532,000 674,879,000 682,545,000 668,127,000 676,195,000 665,825,000 665,825,000 644,687,000 
        trade and other accounts receivable
       422,084,000    395,450,000    432,349,000    453,692,000    391,779,000    336,395,000    335,826,000    314,860,000    335,317,000    306,916,000    287,967,000    302,803,000    309,847,000    297,055,000    278,332,000    257,748,000    214,887,000    203,551,000    207,190,000    198,243,000    186,678,000    158,423,000    
        total shareholders' equity
       1,778,243,000    1,461,583,000  1,235,348,000 1,152,288,000 1,077,061,000 971,943,000 892,740,000 821,800,000 762,407,000 667,376,000 721,335,000 760,090,000 762,129,000 772,773,000 849,210,000 810,355,000 759,824,000 723,526,000 635,285,000 639,249,000 683,098,000 629,338,000 589,176,000 538,196,000 489,907,000 564,072,000 552,481,000 654,785,000 601,649,000 628,450,000 583,705,000 531,015,000 483,251,000 476,963,000 432,214,000 391,148,000 387,564,000 376,181,000 496,389,000 442,890,000 421,041,000    572,448,000                                        
        total liabilities and shareholders' equity
       3,492,465,000    3,129,541,000    2,308,871,000    2,406,818,000    2,558,436,000    1,933,875,000    1,885,132,000    1,697,274,000    1,712,154,000    1,416,436,000    1,289,915,000    1,231,925,000    1,327,274,000    1,257,510,000           1,014,831,000        800,514,000                 
        operating lease liabilities-noncurrent
         59,377,000 58,100,000  57,617,000 58,009,000 59,713,000  49,093,000 47,715,000 45,588,000  47,900,000 50,468,000 53,096,000  52,319,000 50,489,000 50,928,000  45,004,000 42,942,000 43,585,000  44,398,000 42,157,000 43,931,000                                                             
        accumulated other comprehensive loss
            -14,644,000 -34,097,000 -28,874,000 -21,071,000 -66,782,000 -54,757,000 -61,551,000 -71,995,000 -148,629,000 -114,413,000 -85,270,000 -82,227,000 -172,374,000 -164,947,000 -172,055,000 -173,164,000 -162,898,000 -176,652,000 -176,343,000 -162,748,000 -187,611,000 -180,263,000 -176,130,000 -181,316,000 -148,453,000 -144,942,000 -132,691,000 -145,994,000 -163,920,000 -168,597,000 -178,559,000 -182,510,000 -162,571,000 -153,838,000 -148,787,000 -144,526,000 -137,866,000 -143,598,000 -163,467,000 -139,160,000 -66,932,000 -48,807,000 -58,355,000 -60,086,000 -108,382,000 -127,995,000 -127,381,000 -110,689,000 -87,737,000 -99,743,000 -90,647,000 -98,732,000 -68,050,000 -63,144,000 -64,071,000 -73,820,000 -76,831,000 -86,719,000 -81,477,000 -74,784,000 -79,963,000 -79,735,000 -98,874,000 -95,750,000 -39,170,000 -29,735,000 -31,101,000 -34,360,000 -40,328,000 -43,159,000 -45,230,000 -47,165,000 -26,734,000 -28,045,000 -29,901,000 -30,511,000 -26,571,000 -25,492,000 -22,995,000 -21,870,000 -21,570,000 -21,570,000 -22,281,000 
        marketable securities
                       375,918,000 378,902,000 376,295,000                                                                      
        current portion of long-term debt
                       349,434,000                                                                        
        deferred income taxes
                               6,327,000 4,973,000 5,039,000 5,044,000 5,094,000 4,628,000 4,149,000 4,316,000 4,349,000 21,102,000 23,284,000 24,961,000 29,063,000 32,084,000 40,741,000 41,158,000 6,375,000 6,897,000 6,713,000 5,487,000 7,837,000 6,498,000 6,346,000 4,892,000 8,267,000 8,832,000 8,772,000 7,451,000 8,452,000 6,346,000 7,125,000 5,334,000 7,261,000 5,237,000 5,679,000 4,625,000 6,876,000 5,208,000 5,939,000 4,064,000 4,118,000 27,677,000 17,558,000 13,561,000 14,090,000 12,066,000 15,006,000 14,871,000 18,727,000 18,290,000 15,127,000 12,927,000 12,277,000 8,073,000 7,626,000 8,031,000 9,289,000 7,184,000 7,482,000 7,409,000 7,874,000 9,712,000 9,712,000 10,719,000 
        trade and other accounts receivable, less allowance for doubtful accounts
                                340,752,000 349,210,000 351,405,000  347,903,000 372,156,000 378,442,000  325,216,000 332,372,000 331,577,000  302,931,000 303,899,000 314,171,000  311,087,000 312,433,000 303,334,000  327,641,000 347,630,000 340,407,000  323,669,000 327,670,000 331,155,000  307,448,000 320,582,000 311,888,000  307,702,000 313,818,000 292,513,000  266,513,000 251,103,000 214,026,000  229,603,000 208,086,000 193,830,000  248,180,000 254,539,000 236,107,000  212,490,000 208,653,000 185,523,000  190,793,000 194,376,000 174,072,000  171,692,000 177,377,000 155,047,000  148,102,000 148,102,000 146,067,000 
        finished goods and work-in-process
                                    317,276,000 310,444,000 328,782,000  311,817,000 296,593,000 273,568,000  270,082,000 249,237,000 253,441,000  291,574,000 283,933,000 291,866,000  277,747,000 273,464,000 271,403,000  255,626,000 258,017,000 260,682,000  274,054,000 258,458,000 260,484,000                                107,700,000 
        raw materials
                                    58,754,000 56,194,000 61,229,000  59,994,000 49,336,000 46,736,000  46,269,000 44,378,000 39,243,000  39,057,000 41,877,000 44,056,000  47,070,000 47,346,000 44,725,000  48,834,000 45,688,000 51,970,000  53,183,000 51,406,000 47,854,000  52,941,000 61,102,000 51,236,000  46,149,000 34,109,000 33,051,000  30,582,000 24,544,000 25,103,000  43,463,000 37,739,000 31,495,000  25,101,000 24,239,000 27,245,000  27,636,000 23,548,000 28,667,000  18,428,000 17,561,000 17,443,000  13,602,000 13,602,000 12,155,000 
        stores, supplies, and other
                                    12,956,000 12,913,000 12,806,000  11,900,000 10,223,000 10,190,000  12,172,000 9,860,000 10,187,000  9,863,000 9,988,000 9,492,000  8,779,000 8,573,000 8,391,000  8,313,000 8,474,000 8,687,000  7,484,000 7,700,000 6,763,000                                 
        total inventories
                                    388,986,000 379,551,000 402,817,000  383,711,000 356,152,000 330,494,000  328,523,000 303,475,000 302,871,000  340,494,000 335,798,000                                              
        property, plant, and equipment, at cost
                                    1,417,732,000 1,450,101,000 1,502,591,000 1,474,962,000 1,444,885,000 1,352,487,000 1,313,737,000 1,264,957,000 1,232,343,000 1,192,321,000 1,170,539,000 1,128,989,000 1,090,986,000 1,061,745,000 1,025,540,000 1,016,868,000 1,003,510,000 1,003,519,000 990,703,000 985,196,000 1,006,310,000 986,293,000 1,078,658,000 1,070,967,000 1,057,266,000 1,041,669,000 1,046,349,000 1,034,472,000    988,180,000    934,382,000    848,011,000    789,634,000    751,355,000    764,945,000    777,105,000    
        less accumulated depreciation and amortization
                                    770,925,000 800,664,000 840,122,000 822,681,000 808,248,000 791,348,000 774,510,000 761,212,000 757,624,000 746,660,000 738,726,000 726,543,000 720,555,000 713,487,000 706,970,000 709,009,000 706,063,000 713,072,000 704,915,000 700,160,000 723,971,000 713,762,000 718,064,000 712,596,000 703,732,000 690,922,000 692,524,000 681,506,000 677,256,000 676,834,000 667,394,000 654,204,000 648,487,000 632,393,000 633,537,000 631,967,000 629,492,000 619,969,000 605,924,000 606,275,000 611,252,000 615,149,000 609,143,000 606,072,000 600,345,000 605,541,000 595,656,000 589,241,000 587,678,000 582,376,000 602,479,000 610,939,000 616,019,000 614,517,000 613,489,000 610,876,000 598,625,000 598,625,000 588,859,000 
        net property, plant, and equipment
                                    646,807,000 649,437,000 662,469,000 652,281,000 636,637,000 561,139,000 539,227,000 503,745,000 474,719,000 445,661,000 431,813,000 402,446,000 370,431,000 348,258,000 318,570,000 307,859,000 297,447,000 290,447,000 285,788,000 285,036,000 282,339,000 272,531,000 360,594,000 358,371,000 353,534,000 350,747,000 353,825,000 352,966,000    333,976,000    302,415,000    241,736,000    183,562,000    162,114,000    154,006,000    166,229,000    
        inventories:
                                                                                               
        inventories: - sum
                                                  345,414,000   329,383,000 324,519,000      334,721,000                                   
        shareholders’ equity: - sum
                                                     513,497,000 536,485,000     402,205,000 717,287,000                           266,060,000        
        other assets and deferred charges
                                                        44,612,000 53,382,000 67,443,000 72,007,000 67,124,000 72,790,000 71,478,000 73,619,000 70,769,000 52,237,000 47,566,000 48,893,000 55,412,000 49,566,000 88,096,000 37,475,000 41,283,000 37,340,000 35,948,000 31,566,000 20,937,000 22,291,000 21,507,000 22,764,000 22,085,000 22,246,000 38,747,000 38,838,000 39,987,000 42,137,000 43,526,000 44,480,000 48,762,000 60,324,000 61,601,000 68,961,000 75,947,000 75,947,000 72,996,000 
        book overdraft
                                                        5,275,000 8,748,000 5,149,000 3,906,000 6,633,000 2,990,000 7,712,000 1,680,000 6,182,000 9,821,000 2,912,000 1,063,000 2,657,000 3,795,000 2,994,000 2,230,000 2,896,000 2,410,000 2,526,000 999,000 4,612,000 4,040,000 4,336,000 6,249,000 3,525,000 3,060,000 3,368,000 2,549,000 4,266,000 4,114,000 3,586,000 4,222,000 4,661,000 6,171,000 2,734,000 5,015,000    
        long-term debt, current portion
                                                        7,470,000 7,786,000 5,193,000 4,382,000 6,242,000 1,598,000 10,798,000 10,966,000 9,690,000 5,109,000 4,347,000 4,369,000 3,038,000 3,199,000 3,357,000 33,881,000 86,055,000 809,000 796,000 784,000 771,000 759,000 747,000 736,000 724,000 6,308,000 702,000 691,000 671,000 660,000 650,000 640,000 630,000 620,000 610,000 601,000 591,000 591,000  
        assets of discontinued operation
                                                         101,393,000                                      
        liabilities of discontinued operation
                                                         666,000                                      
        short-term investments
                                                                   300,000 300,000 300,000 300,000 300,000 300,000                       
        finished goods
                                                                254,702,000 260,352,000 237,883,000  209,077,000 180,622,000 162,746,000  144,371,000 135,998,000 126,751,000  176,279,000 168,928,000 167,189,000  159,132,000 148,006,000 145,840,000  144,978,000 136,097,000 131,952,000  123,525,000 131,207,000 139,451,000  120,513,000 120,513,000  
        stores, supplies and other
                                                                6,548,000 6,390,000 6,349,000  6,640,000 6,703,000 6,990,000  7,504,000 7,904,000 7,903,000  8,310,000 7,877,000 7,598,000  7,600,000 7,385,000 7,305,000  8,152,000 8,454,000 8,370,000  8,378,000 8,315,000 8,977,000  8,708,000 8,708,000 8,292,000 
        property, plant and equipment, at cost
                                                                1,029,559,000 1,031,536,000 1,019,474,000  980,486,000 961,803,000 932,595,000  922,941,000 892,059,000 859,249,000  838,237,000 823,922,000 804,479,000  779,814,000 780,788,000 766,584,000  742,593,000 737,479,000 756,159,000  775,998,000 774,454,000 776,084,000  761,662,000 761,662,000 754,280,000 
        net property, plant and equipment
                                                                352,303,000 354,702,000 352,080,000  331,999,000 329,410,000 299,058,000  293,449,000 272,090,000 253,325,000  226,985,000 208,773,000 195,336,000  179,469,000 175,247,000 170,928,000  154,915,000 155,103,000 153,680,000  159,979,000 159,937,000 162,595,000  163,037,000 163,037,000 165,421,000 
        common stock (without par value) and paid-in capital; authorized shares - 80,000,000; outstanding shares - 13,404,831 in 2011 and 14,034,884 in 2010
                                                                                               
        common stock (without par value) and paid-in capital; authorized shares - 80,000,000; outstanding shares - 13,833,811 in 2011 and 14,034,884 in 2010
                                                                                               
        common stock (without par value) and paid-in capital; authorized shares - 80,000,000; outstanding shares - 13,845,311 in 2011 and 14,034,884 in 2010
                                                                  4,000                             
        common stock (without par value) and paid-in capital; authorized shares - 80,000,000; outstanding shares - 14,291,122 in 2010 and 15,209,989 in 2009
                                                                                               
        intangibles, net of amortization, and goodwill
                                                                     50,880,000                          
        common stock (without par value) and paid-in capital; authorized shares - 80,000,000; outstanding shares - 14,388,651 in 2010 and 15,209,989 in 2009
                                                                                               
        intangibles, net of amortization and goodwill
                                                                      42,885,000 45,063,000 47,271,000 49,479,000 51,688,000 54,069,000                    
        outstanding shares - 15,042,440 in 2010 and 15,209,989 in 2009
                                                                                               
        intangibles, net of amortization
                                                                            55,941,000 42,479,000 44,017,000 45,555,000 47,093,000 48,631,000 50,170,000 51,708,000 46,617,000 47,692,000 48,761,000 49,874,000 51,876,000 53,054,000 54,606,000 56,282,000 57,969,000 57,969,000 59,613,000 
        restricted cash
                                                                              190,000 190,000 210,000 210,000 210,000 240,000 240,000 240,000 300,000 1,419,000 1,488,000 1,409,000 1,516,000 1,706,000 1,647,000 1,647,000 1,715,000 
        prepaid expenses
                                                                              6,500,000 3,368,000 5,455,000 5,271,000 8,565,000 5,319,000 7,063,000 5,499,000 8,718,000 3,119,000 4,644,000 5,639,000 6,653,000 2,387,000 5,225,000 5,225,000 7,417,000 
        shareholders' equity:
                                                                                               
        issued – 17,295,860 in 2007 and 17,289,860 in 2006
                                                                                               
        receivable—tel marketing agreements services
                                                                                       2,782,000    3,298,000    
        receivable - tel marketing agreements services
                                                                                        1,680,000 3,913,000 2,870,000  3,227,000 3,227,000 2,006,000 
        long-term debit, current portion
                                                                                              9,092,000 
        shareholders’ equity
                                                                                               
      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 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 
                                                                                               
          cash and cash equivalents at beginning of year
        77,598,000 77,476,000 111,936,000 68,712,000 83,304,000 125,172,000 144,397,000 73,040,000 84,166,000 192,154,000 93,424,000 103,003,000 238,703,000 89,129,000 50,370,000 49,192,000 151,831,000 21,761,000 71,872,000 60,300,000 56,413,000 28,778,000 4,315,000 
          cash flows from operating activities:
                                                                                               
          net income
        118,067,000 81,285,000 100,269,000 111,244,000 125,949,000 110,739,000 132,322,000 111,620,000 107,732,000 80,410,000 111,247,000 99,624,000 97,583,000 90,522,000 63,226,000 66,472,000 59,318,000 17,206,000 52,038,000 51,952,000 69,712,000 66,884,000 95,794,000 22,349,000 85,541,000 50,102,000 67,805,000 74,174,000 62,205,000 62,803,000 58,481,000 52,885,000 60,565,000 4,072,000 59,772,000 62,728,000 63,937,000 45,672,000 71,449,000 64,389,000 61,931,000 53,914,000 62,009,000 58,733,000 63,947,000 52,055,000 56,913,000 66,764,000 57,523,000 54,001,000 78,896,000 64,010,000 67,835,000 53,063,000 64,715,000 55,268,000 66,547,000 33,698,000 71,361,000 52,259,000 49,589,000 49,412,000 45,719,000 39,856,000 42,138,000 46,250,000 56,687,000 30,658,000 28,688,000 19,359,000 16,472,000 17,624,000 19,772,000 26,996,000 21,157,000 30,926,000 16,242,000 4,460,000 18,921,000 20,369,000 13,772,000 11,151,000 13,401,000 13,067,000 4,762,000 2,912,000 12,974,000 
          adjustments to reconcile net income to cash from operating activities:
                                                                                               
          depreciation and amortization
        31,662,000 32,051,000 33,101,000 28,492,000 28,778,000 32,063,000 29,764,000 29,323,000 25,807,000 20,345,000 17,107,000 20,245,000 20,313,000 20,125,000 20,490,000 20,598,000 21,072,000 21,245,000 21,356,000 21,088,000 20,631,000 20,957,000 20,689,000 20,987,000 21,369,000 22,060,000 21,784,000 21,777,000 21,939,000 18,296,000 18,243,000 17,555,000 17,665,000 16,144,000 14,573,000 12,317,000 12,306,000 12,154,000 11,657,000 10,402,000 10,680,000 10,887,000 10,812,000 10,380,000 10,186,000 10,294,000 10,525,000 10,461,000 10,258,000 10,218,000 10,042,000 14,088,000 11,796,000 10,940,000     10,378,000                             
          deferred income tax expense
        4,917,000 22,185,000 7,594,000 4,099,000 505,000         -8,960,000 -12,649,000 -8,901,000 -12,135,000 -4,227,000 -449,000 4,199,000 2,455,000 2,149,000 2,083,000 -57,000 3,379,000 3,402,000 -172,000 1,998,000 2,156,000 4,270,000 11,070,000 -3,527,000 2,714,000 18,736,000 523,000 2,833,000 5,283,000 4,524,000 10,065,000 2,925,000 1,671,000 1,622,000 -1,777,000 -513,000 818,000 2,585,000 5,212,000 -1,585,000 1,996,000   671,000 1,742,000 -323,000 -2,617,000 -2,113,000 3,077,000                  -80,000   752,000        5,601,000  
          working capital changes
        -19,610,000  5,345,000 25,762,000 -26,590,000  -41,170,000 -19,262,000 -21,434,000  19,406,000 42,699,000 9,795,000  -83,972,000 -47,678,000 -66,987,000  -38,942,000 -18,063,000 -41,421,000  26,579,000 -18,014,000 -42,058,000  -8,918,000 36,347,000 -63,426,000  5,316,000 -10,851,000 -63,655,000  16,431,000 -11,540,000 -39,836,000  -24,052,000 32,843,000 -7,901,000  -9,493,000 -4,559,000 -13,806,000  6,955,000 1,110,000 -66,764,000  34,508,000 20,211,000 -55,707,000  7,999,000 -26,688,000 -22,877,000  -3,751,000 -39,062,000 -45,598,000  -22,349,000 -27,960,000 -10,903,000  -9,604,000 25,952,000 50,935,000  -15,097,000 -17,338,000 -39,141,000  10,269,000 -14,382,000 6,169,000  6,518,000 -13,097,000 -20,259,000  37,259,000 -19,927,000 -16,646,000  12,007,000 
          cash pension and postretirement contributions
        -2,489,000 -2,315,000 -2,318,000 -2,497,000 -2,374,000 -2,874,000 -3,159,000 -3,054,000 -2,727,000 -3,087,000 -2,112,000 -2,730,000 -2,290,000 -2,637,000 -2,248,000 -2,764,000 -2,099,000 -2,522,000 -2,636,000 -2,607,000 -2,577,000 -2,938,000 -2,565,000 -2,595,000 -2,557,000 -2,624,000 -2,439,000 -2,444,000 -2,425,000 -2,896,000 -48,104,000 -7,043,000 -6,713,000 -6,698,000 -6,630,000 -6,610,000 -6,326,000 -6,466,000 -6,374,000 -6,675,000 -6,383,000 -6,806,000 -6,653,000 -6,624,000 -6,730,000                                           
          other
        -8,514,000 -5,845,000 -1,582,000 -6,023,000 -5,955,000 -10,894,000 1,802,000 -101,000 -2,640,000 9,973,000 2,213,000 -994,000 -10,554,000 -393,000 6,749,000 -10,142,000 -2,910,000 2,519,000 8,497,000 -4,200,000 571,000 1,378,000 -4,074,000 7,166,000 -1,213,000 -9,735,000 4,571,000 -368,000 -1,317,000 -1,259,000 -10,547,000 5,116,000 -2,154,000 813,000 -1,456,000 -3,367,000 -3,163,000 14,915,000 3,492,000 5,079,000 9,858,000 3,207,000 3,978,000 4,882,000 -3,605,000 6,748,000 -3,343,000 2,733,000 3,226,000 17,385,000 -2,284,000 -312,000 3,042,000 3,190,000 -1,294,000 485,000 74,000 2,215,000 -4,468,000 1,197,000 2,198,000 840,000 -2,141,000 4,216,000 -2,825,000 1,378,000 -4,080,000 -3,796,000 20,000 3,785,000 1,766,000 -1,671,000 2,258,000 1,045,000 -4,104,000 1,728,000 494,000 -4,383,000 -617,000 481,000 -681,000 943,000 -1,645,000 1,909,000 2,540,000 -2,340,000 937,000 
          cash from operating activities
        124,033,000 145,168,000 142,409,000 161,077,000 120,313,000 185,237,000 116,552,000 114,964,000 102,839,000 171,607,000 142,826,000 152,475,000 109,915,000 92,658,000 -8,404,000 17,585,000 6,781,000 20,318,000 40,964,000 54,683,000 49,371,000 67,834,000 122,023,000 29,836,000 64,461,000 103,965,000 82,631,000 131,484,000 19,132,000 96,766,000 35,365,000 55,740,000 10,040,000 65,044,000 85,134,000 58,409,000 34,208,000 93,944,000 71,509,000 113,714,000 74,267,000 79,679,000 65,167,000 66,629,000 56,552,000 73,280,000 77,162,000 80,135,000 4,381,000 69,535,000 85,493,000 95,778,000 27,128,000 87,482,000 87,860,000 34,379,000 63,090,000 64,213,000 81,970,000 24,068,000 14,347,000 60,314,000                  10,306,000 6,349,000   6,488,000 1,464,000 -786,000  
          cash flows from investing activities:
                                                                                               
          capital expenditures
        -24,357,000 -27,998,000 -20,344,000 -16,279,000 -13,016,000 -14,619,000 -14,167,000 -14,969,000 -13,564,000 -13,500,000 -8,787,000 -14,125,000 -11,881,000 -15,767,000 -12,595,000 -15,195,000 -12,612,000 -14,909,000 -19,631,000 -23,870,000 -20,524,000 -33,183,000 -20,045,000 -19,982,000 -20,106,000 -22,302,000 -13,913,000 -12,866,000 -10,353,000 -19,502,000 -12,535,000 -19,804,000 -22,797,000 -27,740,000 -35,762,000 -38,865,000 -46,346,000 -41,168,000 -37,417,000 -35,843,000 -28,446,000 -42,293,000 -34,159,000 -29,623,000 -20,424,000 -20,767,000 -18,295,000 -11,403,000 -9,251,000 -11,313,000 -15,314,000 -15,740,000 -16,109,000 -13,309,000 -8,477,000 -9,535,000 -7,432,000 -10,744,000 -7,981,000 -10,639,000 -24,151,000 -11,263,000                  -5,704,000 -4,329,000   -3,881,000 -3,193,000 -4,542,000  
          free cash flows
        99,676,000 117,170,000 122,065,000 144,798,000 107,297,000 170,618,000 102,385,000 99,995,000 89,275,000 158,107,000 134,039,000 138,350,000 98,034,000 76,891,000 -20,999,000 2,390,000 -5,831,000 5,409,000 21,333,000 30,813,000 28,847,000 34,651,000 101,978,000 9,854,000 44,355,000 81,663,000 68,718,000 118,618,000 8,779,000 77,264,000 22,830,000 35,936,000 -12,757,000 37,304,000 49,372,000 19,544,000 -12,138,000 52,776,000 34,092,000 77,871,000 45,821,000 37,386,000 31,008,000 37,006,000 36,128,000 52,513,000 58,867,000 68,732,000 -4,870,000 58,222,000 70,179,000 80,038,000 11,019,000 74,173,000 79,383,000 24,844,000 55,658,000 53,469,000 73,989,000 13,429,000 -9,804,000 49,051,000                  4,602,000 2,020,000   2,607,000 -1,729,000 -5,328,000  
          proceeds from previous acquisition
        1,131,000                                                                                       
          cash from investing activities
        -23,226,000 -241,445,000 -20,344,000 -16,279,000 -13,016,000 -14,619,000 -14,167,000 -12,524,000 -697,488,000 -13,500,000 -8,787,000 -14,125,000 -11,881,000 -15,767,000 -12,595,000 -15,195,000 359,447,000 -15,851,000 -23,407,000 -401,629,000 -20,524,000 -33,183,000 -45,000 -20,909,000 -20,106,000 -22,302,000 -13,913,000 -12,866,000 -10,353,000 -19,468,000 -10,112,000 -7,654,000 -22,797,000 -27,740,000 -219,692,000 -38,865,000 -48,346,000 -41,168,000 -32,123,000 -37,937,000 -32,133,000 -41,094,000 -38,044,000 -27,290,000 -23,295,000 -23,386,000 -18,150,000 -13,531,000 -11,539,000 -10,319,000 123,748,000 -10,189,000 -14,776,000 -13,082,000 -3,958,000 -15,101,000 -6,645,000 -12,509,000 -19,144,000 -16,021,000 -23,282,000 -2,444,000 -13,986,000 -18,421,000 -53,055,000 -19,024,000 -32,369,000 -25,005,000 -19,305,000 -34,324,000 -33,602,000 -21,834,000 -9,112,000 -7,942,000 -7,376,000 12,683,000 -14,196,000 -16,229,000 924,000 -2,213,000 -4,329,000  -2,552,000 -3,817,000 -3,136,000   
          cash flows from financing activities:
                                                                                               
          net borrowings under revolving credit facility
        106,000,000    69,000,000          97,000,000 70,000,000 51,000,000        97,424,000    16,072,000         -24,000,000   45,000,000    10,000,000    6,000,000     -63,000,000                                  
          principal payment on 3.78% senior notes
        -50,000,000 -50,000,000                                                                                   
          repurchases of common stock
        -125,566,000 -20,154,000 -57,064,000     -14,385,000 -28,479,000 -56,716,000 -59,972,000 -53,435,000 -37,347,000 -104,509,000    -1,434,000 -20,527,000 -79,473,000     -83,367,000 -25,333,000 -122,684,000 -632,000     -35,815,000 -14,315,000 -172,609,000 -6,958,000 -1,042,000 -39,173,000 -46,469,000 -85,806,000 -77,061,000 -51,039,000 -14,358,000 -4,290,000 -22,508,000     -12,201,000 -54,380,000 -4,085,000 -27,427,000 -32,548,000 -9,749,000 -64,944,000 -14,276,000     -19,999,000 -6,811,000 -33,189,000              
          dividends paid
        -27,962,000 -28,192,000 -25,841,000 -25,841,000 -26,057,000 -23,943,000 -23,987,000 -23,986,000 -23,986,000 -21,577,000 -21,578,000 -21,587,000 -20,292,000 -20,473,000 -20,930,000 -21,290,000 -21,570,000 -21,794,000 -22,590,000 -20,763,000 -20,763,000 -20,750,000 -20,751,000 -20,756,000 -21,160,000 -21,258,000 -21,260,000 -19,579,000 -19,579,000 -19,670,000 -19,957,000 -20,192,000 -20,629,000 -20,658,000 -20,743,000 -20,743,000 -20,741,000 -18,954,000 -18,958,000 -18,958,000 -18,959,000 -19,158,000 -16,781,000 -17,403,000 -17,421,000 -17,438,000 -13,807,000 -13,955,000 -14,200,000 -14,454,000 -11,934,000 -11,982,000 -11,998,000 -345,510,000 -10,064,000 -10,053,000 -10,054,000 -10,054,000 -15,233,000 -6,398,000 -903,000                           
          cash from financing activities
        -100,851,000 70,970,000 -85,899,000 -195,742,000 -68,466,000 -171,227,000 -113,451,000 -130,908,000 601,391,000 -152,054,000 -159,811,000 -78,678,000 -97,051,000 -83,218,000 15,557,000 -5,847,000 -365,849,000 19,386,000 -110,338,000 -23,357,000 369,442,000 -31,253,000 -107,570,000 -86,746,000 -5,894,000 -19,500,000 -60,892,000 -123,567,000 -4,120,000 -151,377,000 13,257,000 -7,948,000 641,000 -57,701,000 -38,761,000 5,674,000 71,812,000 -42,608,000 -8,964,000 -38,965,000 -12,840,000 -48,068,000 -39,564,000 -36,361,000 -11,485,000 -83,504,000 -24,693,000 -101,751,000 -85,422,000 -69,716,000 -41,608,000 -74,709,000 -33,810,000    -35,343,000 -54,672,000 -67,530,000 3,561,000 7,553,000  -15,346,000 -52,606,000 -52,036,000    -37,591,000    -6,098,000 -32,189,000   -1,828,000 -7,247,000    -510,000 -35,537,000 5,009,000 74,000 -2,010,000 -17,297,000 
          effect of foreign exchange on cash and cash equivalents
        -4,396,000 450,000 -3,968,000 2,948,000 1,946,000 -2,225,000 3,744,000 -966,000 -1,612,000 3,323,000 -2,591,000 1,136,000 420,000  -2,077,000 -1,602,000 867,000 -162,000 -1,470,000 1,762,000 -1,056,000 4,073,000 1,229,000 1,221,000 -4,196,000 2,263,000 -1,074,000 -79,000 548,000 -816,000 -364,000 -3,179,000 780,000 -433,000 280,000 1,573,000 1,416,000 -5,922,000 -650,000 -932,000 -462,000 -7,420,000 -3,404,000 3,951,000 -5,532,000 -4,923,000 -6,427,000 2,134,000 534,000 1,938,000 6,087,000 -1,348,000 -3,658,000  1,870,000 -1,567,000 1,274,000 -1,124,000 -1,722,000 -523,000 1,993,000 -1,299,000 1,272,000 -705,000 -1,565,000 253,000 356,000 6,366,000 -2,024,000 -2,491,000 -2,475,000 273,000 612,000 149,000 1,631,000 162,000 437,000 3,055,000 -1,018,000 -1,375,000 -63,000 1,029,000 1,027,000 -1,607,000 -1,800,000 2,089,000 324,000 
          increase in cash and cash equivalents
        -4,440,000 -24,857,000   40,777,000 -2,834,000 -7,322,000 -29,434,000 5,130,000 9,376,000 -28,363,000 60,808,000 1,403,000  -7,519,000 -5,059,000 1,246,000   -368,541,000 397,233,000 7,471,000 15,637,000 -76,598,000 34,265,000 64,426,000 6,752,000 -5,028,000 5,207,000 -74,895,000 38,146,000 36,959,000 -11,336,000 -20,830,000 -173,039,000 26,791,000 59,090,000 4,246,000 29,772,000 35,880,000 28,832,000 -16,903,000 -15,845,000 6,929,000 16,240,000 -38,533,000    -8,562,000   -25,116,000  30,352,000 -23,391,000 22,376,000 -4,092,000 -6,426,000 11,085,000 611,000 -1,091,000 3,677,000 -41,365,000 -63,860,000 18,061,000 21,722,000 52,538,000 37,749,000 -11,730,000 -6,301,000 -8,238,000 -23,842,000 -11,075,000 -25,418,000 35,464,000 12,601,000 -26,370,000 22,798,000 7,407,000 52,000 16,108,000 8,852,000   -5,023,000 7,528,000 
          cash and cash equivalents at end of period
        73,158,000  32,198,000 -47,996,000 118,253,000  -7,322,000 -29,434,000 117,066,000  -28,363,000 60,808,000 70,115,000  -7,519,000 -5,059,000 84,550,000  -94,251,000 -368,541,000 522,405,000  15,637,000 -76,598,000 178,662,000  6,752,000 -5,028,000 78,247,000  38,146,000 36,959,000 72,830,000  -173,039,000 26,791,000 251,244,000  29,772,000 35,880,000 122,256,000  -15,845,000 6,929,000 119,243,000  27,892,000 -33,013,000 146,657,000  173,720,000 9,532,000 64,013,000  30,352,000 -23,391,000 72,746,000  -6,426,000 11,085,000 49,803,000  3,677,000 -41,365,000 87,971,000  21,722,000 52,538,000 59,510,000  -6,301,000 -8,238,000 48,030,000  -25,418,000 35,464,000 72,901,000  22,798,000 7,407,000 56,465,000  8,852,000 6,073,000 25,380,000  7,528,000 
          adjustments to reconcile net income to cash flows from operating activities:
                                                                                               
          change in assets and liabilities:
                                                                                               
          trade and other accounts receivable
                                                                                               
          inventories
                                                                                               
          prepaid expenses and other current assets
                                                                                               
          accounts payable and accrued expenses
                                                                                               
          operating lease liabilities
                                                                                               
          other current liabilities
                                                                                               
          income taxes payable
                                                                                               
          acquisition of business
             2,445,000 -683,924,000                                                    670,000 1,778,000 -43,748,000     -82,000                  
          net borrowings (repayments) under revolving credit facility
             -114,000,000 -88,000,000 -107,000,000 386,000,000         147,000,000            -47,490,000 58,619,000 135,000,000 22,000,000             -21,000,000 31,000,000      1,000,000                                   
          (payment) proceeds on term loan
         -100,000,000 -100,000,000                                                                                     
          debt issuance costs
             -2,251,000         -965,000 -2,932,000                             -30,000 -1,115,000  -18,000 -2,351,000 -1,000,000 -2,233,000 -944,000   -53,000 -109,000 -303,000     -17,000 -35,000 -94,000         -1,000 -190,000 
          cash and cash equivalents at end of year
                                                                                               
          net (repayments) borrowings under revolving credit facility
                 -136,000,000 -137,000,000 -42,000,000 -46,000,000             2,811,000 -38,966,000       -10,000,000 -16,426,000 26,426,000 -156,000,000             -15,000,000                                     
          decrease in cash and cash equivalents
                                                       -33,013,000 -92,046,000                                    -3,398,000   
          proceeds from term loan
             250,000,000                                                                               
          deferred income tax benefit
             -2,331,000 -3,007,000 -3,562,000 -3,899,000  -5,035,000 -6,369,000 -4,932,000                                                    -640,000   -10,589,000 -35,000    -31,000       1,817,000 1,289,000  -10,243,000 -69,000 -389,000   
          loss on early extinguishment of debt
                     7,545,000                                     6,711,000 3,221,000                               
          loss on marketable securities
                     2,977,000                                                                       
          purchases of marketable securities
                     -787,000 -2,005,000 -3,776,000                                                                     
          proceeds from sales and maturities of marketable securities
                     372,846,000 1,063,000                                                                     
          redemption of 4.10% senior notes
                     -350,000,000                                                                       
          cash costs of 4.10% senior notes redemption
                     -7,099,000                                                                       
          issuance of 2.70% senior notes
                         395,052,000                                                                   
          gain on sale of land
                                                                                              
          proceeds from sale of land
                                                                                              
          unrealized loss on marketable securities
                         4,026,000 1,100,000                                                                     
          net repayments under revolving credit facility
                                                                                               
          tax reform act expense
                                                                                               
          issuance of 3.78% senior notes
                                         250,000,000                                                   
          noncash pension and postretirement expense
                                     774,000 906,000 1,605,000 1,618,000 1,983,000 1,921,000 2,048,000 2,007,000 3,220,000 3,498,000 3,072,000 3,039,000 5,091,000 5,320,000 5,789,000 5,837,000                                           
          realized loss on derivative instruments
                                                         2,463,000 -71,000 2,535,000 -113,000 2,460,000 -138,000 2,474,000 -62,000                              
          deposits for interest rate swap
                                             -359,000 -2,246,000 -4,965,000 -1,351,000 -6,609,000 -1,409,000 -7,118,000 -4,977,000 -1,006,000 -3,536,000 -1,325,000 -1,496,000 -3,256,000 -4,780,000 -2,982,000 -3,346,000 -7,164,000 -7,324,000 -5,079,000 -9,047,000 -17,146,000 -8,866,000 -11,408,000 -9,632,000 -15,550,000 -12,050,000 -6,840,000 -8,830,000                      
          return of deposits for interest rate swap
                                             8,072,000 3,760,000 2,480,000 5,230,000 3,680,000 6,750,000 2,300,000 3,670,000 1,350,000 1,580,000 2,490,000 4,770,000 10,260,000 6,850,000 3,460,000 7,840,000 1,620,000 8,340,000 7,220,000 8,490,000 3,410,000 14,480,000 18,320,000 10,440,000 3,210,000 4,210,000 13,530,000                      
          unrealized gain on derivative instruments
                                                    -95,000    -310,000    -3,212,000                                   
          prepaid expenses
                                                                                               
          book overdrafts
                                                                                               
          supplemental disclosure of non-cash transactions:
                                                                                               
          release of deposit account funds to terminate interest rate swap
                                                                                               
          non-cash additions to property, plant, and equipment
                                          -2,136,000 -8,261,000 16,840,000  3,756,000 -9,181,000 9,975,000                                               
          non-cash obligation under capital lease
                                              5,068,000                                               
          unrealized loss on derivative instruments
                                               1,679,000 1,372,000         -1,506,000 -1,805,000   -192,000 -800,000 5,863,000 -4,208,000  10,470,000 4,116,000 -3,369,000                           
          proceeds from legal settlements
                                                                                            
          gain on sale of discontinued business
                                                                                              
          proceeds from sale of discontinued business
                                                                                              
          additions to property, plant, and equipment included in current liabilities
                                                  -713,000 5,637,000 5,433,000                                           
          issuance of 4.10% senior notes
                                                                                               
          repayment of 7.125% senior notes
                                                                                             
          repayment of foundry park i mortgage loan
                                                                     -627,000 -207,000                       
          net repayments under lines of credit
                                                                                               
          noncash pension benefits expense
                                                      4,682,000 3,034,000 3,026,000 5,504,000 4,663,000 4,671,000 4,569,000 3,805,000 3,819,000 3,828,000 3,792,000 3,899,000 3,437,000 3,216,000 3,167,000 3,676,000 3,539,000 3,317,000 3,379,000 3,431,000 3,391,000 3,294,000 3,462,000 2,955,000 3,180,000 2,816,000 2,801,000 3,249,000              
          noncash postretirement benefits expense
                                                      742,000 495,000 628,000 1,191,000 661,000 947,000 877,000 904,000 714,000 1,000,000 993,000 693,000 487,000 801,000 799,000 709,000 585,000 770,000 768,000 665,000 571,000 706,000 705,000 680,000 256,000 879,000 879,000 590,000              
          cash pension benefits contributions
                                                      -6,723,000 -4,889,000 -4,819,000 -6,678,000 -8,380,000 -8,112,000 -7,573,000 -8,045,000 -7,375,000 -7,811,000 -7,355,000 -7,459,000 -7,365,000 -7,370,000 -7,253,000 -6,145,000 -4,946,000 -6,959,000 -2,283,000 -6,420,000 -6,287,000 -6,760,000 -4,261,000 -4,354,000 -4,182,000 -4,217,000 -2,597,000 -4,695,000              
          cash postretirement benefits contributions
                                                      -319,000 -316,000 -383,000 -358,000 -510,000 -414,000 -458,000 -296,000 -581,000 -340,000 -628,000 -438,000 -501,000 -532,000 -458,000 -467,000 -508,000 -429,000 -431,000 -275,000 -429,000 -192,000 -384,000 -525,000 -682,000 -228,000 -513,000 -715,000              
          net borrowings under lines of credit
                                                                 1,221,000                              
          net (repayments) borrowings under lines of credit
                                                       10,000 -161,000     -1,860,000 4,644,000                                 
          gain on legal settlement
                                                                             -48,000 -3,179,000               
          noncash environmental remediation and dismantling
                                                          881,000 223,000 281,000 299,000 138,000 -602,000 251,000 -74,000 708,000 500,000 187,000 1,356,000 36,000 2,034,000 128,000 152,000 37,000 2,035,000 1,953,000 666,000 338,000 -542,000 1,015,000 2,060,000              
          noncash foreign exchange loss
                                                          3,654,000 1,062,000 -86,000 -592,000   1,215,000 -761,000 998,000 -1,419,000 1,296,000 -134,000 -2,472,000 -949,000 2,952,000 1,261,000                      
          restricted stock award
                                                          239,000 232,000 244,000 246,000                                  
          gain on sale of equity securities
                                                                                              
          cash payment for 7.125% senior notes redemption premium
                                                                                               
          change in book overdraft
                                                          -3,473,000 3,599,000 1,243,000 -2,727,000 3,643,000 -4,722,000 6,032,000 -4,502,000 -3,639,000 6,909,000 1,849,000 -1,594,000 -1,138,000 801,000 764,000 -666,000 486,000 -116,000 1,527,000 -3,613,000 572,000 -296,000 -1,913,000 2,724,000 465,000 -308,000 819,000 -1,717,000 152,000 528,000 -636,000 -439,000 -1,510,000 3,437,000 -2,281,000   
          payments on settlement of interest rate swap
                                                          -2,531,000 -2,617,000 -2,574,000 -2,574,000 -2,574,000 -2,574,000                          
          receipts from settlement of interest rate swap
                                                          68,000 71,000 82,000 113,000 114,000 138,000 100,000 62,000 67,000 74,000 71,000 131,000                          
          proceeds from sale of equity securities
                                                                                              
          net borrowings (repayments) under lines of credit
                                                          -316,000 2,593,000 811,000                                   
          cash payment for 7.125% senior notes redemption
                                                                                             
          excess tax benefits from stock-based payment arrangements
                                                                 -64,000 -2,000           -45,000 -214,000 -686,000     -114,000 -739,000 -72,000 -576,000       
          proceeds from sale of short-term investment
                                                                 300,000                           
          proceeds from exercise of stock options
                                                                 66,000 4,000 70,000 17,000 4,000 9,000 9,000 22,000 69,000 15,000 53,000 178,000  -1,000 27,000  118,000 250,000 462,000  126,000 223,000 4,000  38,000 
          payments on the capital lease
                                                                    -144,000     -200,000 -198,000 -195,000 -191,000 -188,000 -185,000 -182,000 -181,000 -167,000 -183,000 -172,000 -168,000           
          depreciation and other amortization
                                                               10,612,000 10,065,000    10,167,000 9,836,000 10,113,000 8,939,000 8,779,000 8,088,000 7,917,000 7,805,000 7,763,000 7,518,000 6,831,000 6,869,000 6,749,000  6,827,000 6,711,000 7,577,000  7,278,000 7,387,000 7,491,000  8,190,000 8,399,000 9,166,000  10,503,000 
          amortization of deferred financing costs
                                                               265,000 417,000 408,000 407,000 409,000 379,000 343,000 383,000 383,000 358,000 360,000 307,000 300,000 280,000 252,000 250,000 249,000 250,000 249,000 252,000 250,000 247,000 437,000 472,000 473,000 472,000 473,000 472,000 472,000 473,000 473,000 475,000 
          noncash foreign exchange gain
                                                                                               
          net borrowings under revolving credit agreements
                                                                                               
          cash (used in) provided from financing activities
                                                                         7,005,000 13,847,000             689,000 -1,905,000       
          net (repayments) borrowings under revolving credit agreements
                                                                -22,000,000                               
          repayment on foundry park i mortgage loan
                                                                -715,000 -702,000 -689,000 -676,000 -664,000 -651,000                          
          net (repayments) borowings under lines of credit
                                                                -223,000                               
          cash flows from operating activities
                                                                                               
          unrealized loss on derivative instruments—net
                                                                                               
          stock award
                                                                 893,000                              
          proceeds from legal settlement
                                                                              48,000 3,179,000               
          cash flows from investing activities
                                                                                               
          deposits for interest rate lock agreement
                                                                                              
          return of deposits for interest rate lock agreement
                                                                                              
          purchase of short-term investment
                                                                                              
          foundry park i deferred leasing costs
                                                                                             
          cash flows from financing activities
                                                                                               
          net borrowings (repayments) under revolving credit agreement
                                                                     -16,000,000 2,000,000                         
          repayment of foundry park i construction loan
                                                                     -99,102,000                       
          draws on foundry park i construction loan
                                                                         13,868,000 17,602,000 17,588,000 6,545,000 13,118,000 9,236,000 10,500,000 5,347,000 354,000              
          borrowing under foundry park i mortgage loan
                                                                     68,400,000                       
          payment for financed intangible asset
                                                                     -250,000 -250,000 -250,000 -250,000 -250,000 -250,000 -250,000 -250,000 -250,000 -250,000 -250,000 -250,000               
          deferred income taxes
                                                                  1,405,000 385,000 3,243,000  -1,716,000                         
          net proceeds from legal settlements
                                                                                               
          net borrowings under revolving credit agreement
                                                                  7,000,000 7,000,000 37,000,000         10,100,000                  
          payments on capital lease
                                                                                              
          borrowing under (repayment of) line of credit
                                                                                               
          borrowing under line of credit
                                                                    71,000                           
          net gain on settlements
                                                                                               
          net proceeds from settlements
                                                                                               
          foundry park i capital expenditures
                                                                     -2,046,000 -11,127,000 -16,581,000 -16,711,000 -7,111,000 -13,774,000 -10,248,000 -14,132,000 -4,666,000 -1,250,000 -2,165,000 -1,483,000 -686,000           
          dividends
                                                                     -6,212,000 -5,359,000 -5,396,000 -5,641,000 -5,703,000 -3,802,000 -3,801,000 -3,041,000 -3,041,000 -5,843,000 -3,093,000 -3,154,000 -1,946,000 -2,350,000 -183,000 -2,162,000 -2,155,000   -2,148,000       
          debt issuance costs-foundry park i
                                                                                              
          loss on derivative instruments
                                                                                               
          payments on capital leases
                                                                      -210,000 -207,000 -204,000                       
          loss on derivative instruments - net
                                                                                               
          cash provided from operating activities
                                                                       30,367,000 42,796,000 29,827,000    9,085,000    28,907,000 34,760,000 17,722,000 28,188,000 -5,949,000          
          gain on derivative instruments - net
                                                                        1,376,000                       
          repayments under revolving credit agreement
                                                                                               
          debt issuance costs - foundry park i
                                                                        -1,524,000                       
          unrealized loss/(gain) on derivative instruments – net
                                                                                               
          gain on settlement and termination of tel marketing agreements
                                                                                 -1,674,000             
          long-term receivable – tel marketing agreements
                                                                                               
          proceeds from settlement and termination of tel marketing agreements
                                                                                             
          payment for acquisition of intangible asset
                                                                                 -250,000 -250,000 -250,000 -2,150,000           
          net (repayments) borrowings under revolving credit agreement
                                                                                              
          draws on foundry park i bridge loan
                                                                                              
          repayment of foundry park i bridge loan
                                                                                              
          repayment of 8.875% senior notes
                                                                                 -250,000           
          deferred income tax (benefit) expense
                                                                                    -996,000           
          unrealized gain on derivative instruments - net
                                                                                               
          noncash foreign exchange impact on the consolidated statements of income
                                                                           4,723,000 -488,000                   
          unrealized loss on derivative instruments - net
                                                                                               
          cash provided from (used in) operating activities
                                                                           58,060,000 96,669,000                   
          deposit for interest rate lock agreement
                                                                           -1,000,000 -4,000,000                   
          proceeds from interest rate lock agreement
                                                                                               
          deposit for interest rate swap
                                                                                               
          net repayments under revolving credit agreement
                                                                           -41,900,000                   
          foreign exchange impact on intercompany transactions
                                                                            8,031,000                   
          noncash foreign exchange impact on p&l
                                                                                               
          pharmaceutical earn-out agreement
                                                                                              
          interest on income tax settlement
                                                                                             
          gains on sales of corporate property
                                                                                               
          stock-based compensation
                                                                                               
          cash costs of 8.875% senior notes purchase
                                                                                               
          proceeds from pharmaceutical earn-out agreement
                                                                                              
          proceeds from sale of certain assets
                                                                                               
          issuance of 7.125% senior notes
                                                                                               
          cash provided from (used in) financing activities
                                                                             16,000,000                  
          noncash foreign exchange impact
                                                                              1,218,000                 
          long-term receivable - tel marketing agreements
                                                                                    -242,000  1,684,000 191,000 696,000  501,000 1,034,000 -416,000   
          proceeds from (payment for) interest rate lock agreement
                                                                              1,050,000               
          cash (used in) provided from operating activities
                                                                               6,377,000 -9,244,000               
          cash provided from financing activities
                                                                                               
          long-term receivable—tel marketing agreements
                                                                                               
          payment for interest rate guarantee
                                                                                 -1,110,000           
          proceeds from exercise of options
                                                                                               
          gain on sale of property
                                                                                              
          proceeds from insurance settlement
                                                                                      4,200,000 3,750,000 1,400,000    
          proceeds from income tax settlement
                                                                                              
          proceeds from sale of property
                                                                                              
          noncash pension expense
                                                                                   2,678,000 2,658,000 2,871,000 2,888,000 3,398,000 3,344,000 3,391,000 3,059,000 3,224,000 3,282,000 2,819,000 2,826,000 
          cash pension contributions
                                                                                   -4,917,000 -3,961,000 -7,005,000 -3,643,000 -3,873,000 -3,399,000 -3,602,000 -3,602,000 -3,753,000 -1,308,000 -2,500,000 -2,673,000 
          foundry park i bridge loan
                                                                                               
          tel working capital advance
                                                                                             -4,080,000 444,000 
          acquisition of intangible asset
                                                                                               
          purchase of certain property
                                                                                              
          repayments of debt—old agreements
                                                                                               
          gain on insurance settlement
                                                                                            
          payment of capital leases
                                                                                      -163,000         
          decrease in capital lease
                                                                                        -159,000 -156,000 -153,000     
          gain on sale of phenolic antioxidant business
                                                                                               
          cumulative effect of accounting change
                                                                                               
          receivable—tel marketing agreements services
                                                                                               
          proceeds from sale of phenolic antioxidant business
                                                                                               
          prepayment for tel marketing agreements services
                                                                                               
          cash (used in) provided from investing activities
                                                                                             -4,316,000 -7,366,000 
          issuance of senior notes and term loan
                                                                                               
          repayments on term loan
                                                                                               
          gain on sale of corporate property
                                                                                               
          proceeds from sale of corporate property
                                                                                               
          repayment under revolving credit agreement
                                                                                               
          repayment of debt - previous agreements
                                                                                               
          issuance of term loan
                                                                                               
          financing costs
                                                                                               
          borrowing under revolving credit agreement
                                                                                           1,500,000 2,500,000   
          cumulative effect of accounting changes
                                                                                               
          net loss on sales and impairments of assets
                                                                                               
          proceeds from contract settlement
                                                                                               
          net borrowings—old agreements
                                                                                               
          repayment of revolving credit agreement
                                                                                               
          issuance of revolving credit agreement
                                                                                              
          repayment of term loan