7Baggers

Materion Corporation
(NYSE:MTRN) 

MTRN stock logo

Materion Corporation manufactures and sells advanced engineered materials used in semiconductor, industrial, aerospace and defense, automotive, energy, consumer electronics, and telecom and data center markets in the United States, Asia, Europe, and internationally. It operates through Performance A...

Founded: 1931
Full Time Employees: 2,600
Sector: Basic Materials
Industry: Other Industrial Metals & Mining

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Quarterly
Annual
    Unit: USD2026-04-03 2025-12-31 2025-09-26 2025-06-27 2025-03-28 2024-12-31 2024-09-27 2024-06-28 2024-03-29 2023-12-31 2023-09-29 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-07-01 2022-04-01 2021-12-31 2021-10-01 2021-07-02 2021-04-02 2020-12-31 2020-09-25 2020-06-26 2020-03-27 2019-12-31 2019-09-27 2019-06-28 2019-03-29 2018-12-31 2018-09-28 2018-06-29 2018-03-30 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-07-01 2016-04-01 2015-12-31 2015-10-02 2015-07-03 2015-04-30 2014-12-31 2014-09-26 2014-06-27 2014-03-28 2013-12-31 2013-09-27 2013-06-28 2013-03-29 2012-12-31 2012-09-28 2012-06-29 2012-03-30 2011-12-31 2011-09-30 2011-07-01 2011-04-01 2010-12-31 2010-10-01 2010-07-02 2010-04-02 2009-12-31 2009-10-02 2009-07-03 2009-04-03 2008-12-31 2008-09-26 2008-06-27 2008-03-28 2007-12-31 2007-09-28 2007-06-29 2007-03-30 2006-09-29 2006-06-30 2006-03-31 2005-09-30 2005-07-01 2005-04-01 2004-10-01 2004-07-02 
                                                                                         
      net sales
    549,824,000 489,754,000 444,808,000 431,658,000 420,330,000 436,871,000 436,715,000 425,866,000 385,287,000 421,043,000 403,067,000 398,551,000 442,526,000 434,578,000 428,191,000 445,295,000 449,045,000 397,231,000 388,028,000 370,999,000 354,386,000 339,689,000 287,171,000 271,468,000 277,946,000 280,161,000 305,979,000 297,843,000 301,441,000 298,070,000 297,193,000 309,085,000 303,467,000 308,668,000 294,268,000 295,842,000 240,669,000 234,330,000 249,619,000 249,776,000 235,511,000 214,039,000 244,354,000 276,855,000 290,024,000 288,425,000 291,570,000 287,965,000 258,929,000 286,138,000 275,434,000 306,141,000 299,169,000 303,759,000 290,601,000 325,088,000 353,630,000 334,421,000 392,794,000 424,710,000 374,805,000 355,977,000 325,309,000 325,946,000 295,082,000 215,154,000 190,538,000 174,134,000 135,359,000 196,286,000 240,494,000 246,584,000 226,347,000 240,904,000 230,928,000 233,563,000 250,314,000 200,426,000 187,078,000 167,723,000 135,614,000 134,651,000 130,372,000 125,766,000 128,639,000 
      yoy
    30.81% 12.10% 1.85% 1.36% 9.10% 3.76% 8.35% 6.85% -12.93% -3.11% -5.87% -10.50% -1.45% 9.40% 10.35% 20.03% 26.71% 16.94% 35.12% 36.66% 27.50% 21.25% -6.15% -8.86% -7.79% -6.01% 2.96% -3.64% -0.67% -3.43% 0.99% 4.48% 26.09% 31.72% 17.89% 18.44% 2.19% 9.48% 2.15% -9.78% -18.80% -25.79% -16.19% -3.86% 12.01% 0.80% 5.86% -5.94% -13.45% -5.80% -5.22% -5.83% -15.40% -9.17% -26.02% -23.46% -5.65% -6.06% 20.74% 30.30% 27.02% 65.45% 70.73% 87.18% 118.00% 9.61% -20.77% -29.38% -40.20% -18.52% 4.14% 5.57% -9.57% 20.20% 23.44% 39.26% 84.58% 48.85% 43.50% 33.36% 5.42%     
      qoq
    12.27% 10.10% 3.05% 2.70% -3.79% 0.04% 2.55% 10.53% -8.49% 4.46% 1.13% -9.94% 1.83% 1.49% -3.84% -0.84% 13.04% 2.37% 4.59% 4.69% 4.33% 18.29% 5.78% -2.33% -0.79% -8.44% 2.73% -1.19% 1.13% 0.30% -3.85% 1.85% -1.68% 4.89% -0.53% 22.92% 2.71% -6.12% -0.06% 6.06% 10.03% -12.41% -11.74% -4.54% 0.55% -1.08% 1.25% 11.21% -9.51% 3.89% -10.03% 2.33% -1.51% 4.53% -10.61% -8.07% 5.74% -14.86% -7.51% 13.31% 5.29% 9.43% -0.20% 10.46% 37.15% 12.92% 9.42% 28.65% -31.04% -18.38% -2.47% 8.94% -6.04% 4.32% -1.13% -6.69% 24.89% 7.13% 11.54% 23.68% 0.72% 3.28% 3.66% -2.23%  
      cost of sales
    467,989,000 426,088,000 358,685,000 349,000,000 344,151,000 343,895,000 355,777,000 345,007,000 314,075,000 341,328,000 314,131,000 309,496,000 351,190,000 336,159,000 345,448,000 357,868,000 373,754,000 324,159,000 313,715,000 301,418,000 287,590,000 287,361,000 240,531,000 223,378,000 232,371,000 224,868,000 241,034,000 228,249,000 232,129,000 232,018,000 232,258,000 247,247,000 245,187,000 249,930,000 239,065,000 241,285,000 197,673,000 190,285,000 198,864,000 204,470,000 192,154,000 170,944,000 200,351,000 225,528,000 237,669,000 232,628,000 236,727,000 238,164,000 213,467,000 244,457,000 230,297,000 253,320,000 250,830,000 259,788,000 238,232,000 272,064,000 304,212,000 294,922,000 335,444,000 362,039,000 319,005,000 296,710,000 267,095,000 270,093,000 245,768,000 185,660,000 165,347,000 152,000,000 120,757,000 171,181,000 195,321,000 201,736,000 189,329,000 201,670,000 184,655,000 191,782,000 180,930,000 160,715,000 147,259,000 133,580,000 109,674,000 105,545,000 101,795,000 99,182,000 99,198,000 
      gross margin
    81,835,000 63,666,000 86,123,000 82,658,000 76,179,000 92,976,000 80,938,000 80,859,000 71,212,000 79,715,000 88,936,000 89,055,000 91,336,000 98,419,000 82,743,000 87,427,000 75,291,000 73,072,000 74,313,000 69,581,000 66,796,000 52,328,000 46,640,000 48,090,000 45,575,000 55,293,000 64,945,000 69,594,000 69,312,000 66,052,000 64,935,000 61,838,000 58,280,000 58,738,000 55,203,000 54,557,000 42,996,000 44,045,000 50,755,000 45,306,000 43,357,000 43,095,000 44,003,000 51,327,000 52,355,000 55,797,000 54,843,000 49,801,000 45,462,000 41,681,000 45,137,000 52,821,000 48,339,000 43,971,000 52,369,000 53,024,000 49,418,000 39,499,000 57,350,000 62,671,000 55,800,000 59,267,000 58,214,000 55,853,000 49,314,000 29,494,000 25,191,000 22,134,000 14,602,000 31,759,750 45,173,000 44,848,000 37,018,000 39,359,500 46,273,000 41,781,000 69,384,000 39,711,000 39,819,000 34,143,000 25,940,000 29,106,000 28,577,000 26,584,000 29,441,000 
      yoy
    7.42% -31.52% 6.41% 2.22% 6.97% 16.64% -8.99% -9.20% -22.03% -19.00% 7.48% 1.86% 21.31% 34.69% 11.34% 25.65% 12.72% 39.64% 59.33% 44.69% 46.56% -5.36% -28.19% -30.90% -34.25% -16.29% 0.02% 12.54% 18.93% 12.45% 17.63% 13.35% 35.55% 33.36% 8.76% 20.42% -0.83% 2.20% 15.34% -11.73% -17.19% -22.76% -19.77% 3.06% 15.16% 33.87% 21.50% -5.72% -5.95% -5.21% -13.81% -0.38% -2.18% 11.32% -8.69% -15.39% -11.44% -33.35% -1.48% 12.21% 13.15% 100.95% 131.09% 152.34% 237.72% -7.13% -44.23% -50.65% -60.55% -19.31% -2.38% 7.34% -46.65% -0.89% 16.21% 22.37% 167.48% 36.44% 39.34% 28.43% -11.89%     
      qoq
    28.54% -26.08% 4.19% 8.50% -18.07% 14.87% 0.10% 13.55% -10.67% -10.37% -0.13% -2.50% -7.20% 18.95% -5.36% 16.12% 3.04% -1.67% 6.80% 4.17% 27.65% 12.20% -3.02% 5.52% -17.58% -14.86% -6.68% 0.41% 4.94% 1.72% 5.01% 6.11% -0.78% 6.40% 1.18% 26.89% -2.38% -13.22% 12.03% 4.50% 0.61% -2.06% -14.27% -1.96% -6.17% 1.74% 10.12% 9.54% 9.07% -7.66% -14.55% 9.27% 9.93% -16.04% -1.24% 7.30% 25.11% -31.13% -8.49% 12.31% -5.85% 1.81% 4.23% 13.26% 67.20% 17.08% 13.81% 51.58% -54.02% -29.69% 0.72% 21.15% -5.95% -14.94% 10.75% -39.78% 74.72% -0.27% 16.62% 31.62% -10.88% 1.85% 7.50% -9.70%  
      gross margin %
    14.88% 13.00% 19.36% 19.15% 18.12% 21.28% 18.53% 18.99% 18.48% 18.93% 22.06% 22.34% 20.64% 22.65% 19.32% 19.63% 16.77% 18.40% 19.15% 18.76% 18.85% 15.40% 16.24% 17.71% 16.40% 19.74% 21.23% 23.37% 22.99% 22.16% 21.85% 20.01% 19.20% 19.03% 18.76% 18.44% 17.87% 18.80% 20.33% 18.14% 18.41% 20.13% 18.01% 18.54% 18.05% 19.35% 18.81% 17.29% 17.56% 14.57% 16.39% 17.25% 16.16% 14.48% 18.02% 16.31% 13.97% 11.81% 14.60% 14.76% 14.89% 16.65% 17.89% 17.14% 16.71% 13.71% 13.22% 12.71% 10.79% 16.18% 18.78% 18.19% 16.35% 16.34% 20.04% 17.89% 27.72% 19.81% 21.28% 20.36% 19.13% 21.62% 21.92% 21.14% 22.89% 
      selling, general, and administrative expense
    36,200,000 34,317,000 38,256,000 35,039,000 35,445,000 41,134,000 35,009,000 33,601,000 35,844,000 39,858,000 38,806,000 38,911,000 40,336,000 46,672,000 38,958,000 42,047,000 41,662,000 45,746,000 43,195,000 38,060,000 36,776,000 34,671,000 35,696,000 32,852,000 30,744,000 30,898,000 36,311,000 39,891,000 40,064,000 37,682,000 38,872,000 38,473,000 38,462,000 38,052,000 36,415,000 38,075,000 33,628,000 32,582,000 34,177,000 32,437,000 30,487,000 28,363,000 29,753,000 34,884,000 36,941,000                                         
      research and development expense
    6,157,000 6,475,000 6,548,000 6,413,000 6,505,000 6,316,000 7,868,000 7,702,000 7,142,000 6,442,000 6,322,000 7,154,000 7,621,000 6,881,000 7,430,000 7,592,000 7,074,000 7,411,000 6,354,000 6,604,000 6,206,000 6,179,000 5,417,000 4,502,000 4,185,000 5,207,000 5,262,000 4,062,000 3,740,000 3,434,000 4,250,000 3,860,000 3,643,000 3,878,000 3,429,000 3,544,000 3,130,000 2,942,000 3,237,000 3,171,000 3,452,000 3,361,000 2,501,000 3,586,000 3,348,000 3,377,000 3,243,000 3,443,000 2,787,000 3,531,000 3,190,000 3,154,000 3,557,000 3,195,000 3,019,000 3,198,000 3,092,000 3,135,000 2,821,000 2,714,000 2,410,000 1,887,000 1,742,000 1,798,000 1,685,000 1,831,000 1,720,000 1,526,000 1,695,000 1,633,000 1,748,000 1,644,000 1,497,000 1,423,000 968,000 1,275,000 1,326,000 971,000 954,000 1,081,000 1,137,000 1,295,000 1,241,000   
      restructuring expense
    2,295,000 426,000 212,000 479,000 2,038,000 687,000 1,493,000 3,048,000 1,620,000 630,000 1,077,000 1,454,000 664,000 390,000 484,000  1,076,000 -60,000   -378,000 4,093,000 2,593,000 2,387,000 2,164,000                                                             
      other—net
    9,008,000 3,767,000 6,164,000 3,908,000 4,996,000 3,528,000 5,309,000 4,446,000 4,357,000 4,544,500 6,211,000 6,192,000 5,775,000 4,643,750 6,774,000 5,928,000 5,873,000 3,068,000 3,604,000 4,194,000 4,474,000 1,035,750 2,221,000 -357,000 2,279,000 2,488,500 2,942,000 2,891,000 4,121,000 2,596,000 3,147,000 4,313,000 2,924,000 2,455,750 3,801,000 3,204,000 2,818,000 2,249,250 3,190,000 3,921,000 1,886,000 -133,000 1,590,000 36,000 -2,158,000 -794,250 -644,000 -2,895,000 363,000 2,398,000 4,161,000 2,950,000 2,480,000 2,711,500 3,129,000 3,928,000                              
      operating profit
    28,175,000 10,839,000 34,943,000 36,819,000 27,195,000 -38,347,000 31,259,000 32,062,000 22,249,000 27,640,000 36,520,000 35,344,000 36,940,000 39,191,000 29,097,000 31,860,000 19,606,000 15,510,000 21,160,000 20,723,000 19,718,000 3,359,000 713,000 8,706,000 -4,563,000 16,574,000 6,289,000 22,750,000 21,387,000 14,387,000 18,666,000 15,192,000 13,251,000 13,867,000 11,558,000 9,734,000 3,420,000 3,644,000 10,151,000 5,777,000 7,532,000 8,064,000 10,159,000 12,821,000 14,224,000 13,915,000 17,421,000 14,568,000 11,053,000 -2,063,000 5,982,000 13,390,000 9,522,000 1,058,000 13,389,000 12,445,000 9,884,000 966,000 17,191,000 20,845,000 18,077,000 19,007,000 20,923,000 20,498,000 13,205,000 -5,982,000 -551,000 -1,560,000 -11,392,000 -4,532,000 13,021,000 11,612,000 7,971,000 18,823,000 16,170,000 12,617,000 36,855,000 10,634,000 11,294,000 8,829,000 5,803,000 7,425,000 6,424,000 5,716,000 9,055,000 
      yoy
    3.60% -128.27% 11.79% 14.84% 22.23% -238.74% -14.41% -9.29% -39.77% -29.47% 25.51% 10.94% 88.41% 152.68% 37.51% 53.74% -0.57% 361.74% 2867.74% 138.03% -532.13% -79.73% -88.66% -61.73% -121.34% 15.20% -66.31% 49.75% 61.40% 3.75% 61.50% 56.07% 287.46% 280.54% 13.86% 68.50% -54.59% -54.81% -0.08% -54.94% -47.05% -42.05% -41.69% -11.99% 28.69% -774.50% 191.22% 8.80% 16.08% -294.99% -55.32% 7.59% -3.66% 9.52% -22.12% -40.30% -45.32% -94.92% -17.84% 1.69% 36.90% -417.74% -3897.28% -1413.97% -215.91% 31.99% -104.23% -113.43% -242.92% -124.08% -19.47% -7.97% -78.37% 77.01% 43.17% 42.90% 535.10% 43.22% 75.81% 54.46% -35.91%     
      qoq
    159.94% -68.98% -5.10% 35.39% -170.92% -222.68% -2.50% 44.11% -19.50% -24.32% 3.33% -4.32% -5.74% 34.69% -8.67% 62.50% 26.41% -26.70% 2.11% 5.10% 487.02% 371.11% -91.81% -290.80% -127.53% 163.54% -72.36% 6.37% 48.66% -22.92% 22.87% 14.65% -4.44% 19.98% 18.74% 184.62% -6.15% -64.10% 75.71% -23.30% -6.60% -20.62% -20.76% -9.86% 2.22% -20.13% 19.58% 31.80% -635.77% -134.49% -55.32% 40.62% 800.00% -92.10% 7.59% 25.91% 923.19% -94.38% -17.53% 15.31% -4.89% -9.16% 2.07% 55.23% -320.75% 985.66% -64.68% -86.31% 151.37% -134.81% 12.13% 45.68% -57.65% 16.41% 28.16% -65.77% 246.58% -5.84% 27.92% 52.15% -21.85% 15.58% 12.39% -36.87%  
      operating margin %
    5.12% 2.21% 7.86% 8.53% 6.47% -8.78% 7.16% 7.53% 5.77% 6.56% 9.06% 8.87% 8.35% 9.02% 6.80% 7.15% 4.37% 3.90% 5.45% 5.59% 5.56% 0.99% 0.25% 3.21% -1.64% 5.92% 2.06% 7.64% 7.09% 4.83% 6.28% 4.92% 4.37% 4.49% 3.93% 3.29% 1.42% 1.56% 4.07% 2.31% 3.20% 3.77% 4.16% 4.63% 4.90% 4.82% 5.97% 5.06% 4.27% -0.72% 2.17% 4.37% 3.18% 0.35% 4.61% 3.83% 2.80% 0.29% 4.38% 4.91% 4.82% 5.34% 6.43% 6.29% 4.48% -2.78% -0.29% -0.90% -8.42% -2.31% 5.41% 4.71% 3.52% 7.81% 7.00% 5.40% 14.72% 5.31% 6.04% 5.26% 4.28% 5.51% 4.93% 4.54% 7.04% 
      other non-operating income—net
    -309,000   -567,000 -666,000   -640,000 -643,000   -726,000 -730,000   -1,168,000 -1,169,000 -958,000 -1,279,000 -1,277,000 -1,276,000                                                                 
      interest expense—net
    7,578,000 5,672,750 7,544,000 8,230,000 6,917,000 6,480,000 8,839,000 8,802,000 8,279,000 5,705,000 7,678,000 7,641,000 7,502,000 3,581,250 5,888,000 4,701,000 3,735,000 620,000 861,000 858,000 761,000 709,750 1,334,000 1,259,000 246,000 350,500 436,000 500,000 466,000 502,500 613,000 667,000 730,000 430,250 533,000 695,000 493,000 354,250 490,000 512,000 415,000 473,250 586,000 650,000 657,000 533,000 764,000 672,000 695,000 589,000 715,000 813,000 828,000 574,250 779,000 820,000                              
      income before income taxes
    20,906,000 3,331,000 28,110,000 29,156,000 20,944,000 -46,673,000 23,062,000 23,900,000 14,613,000 19,706,000 29,527,000 28,429,000 30,168,000 33,349,000 24,384,000 28,327,000 17,040,000 14,372,000 21,578,000 21,142,000 20,233,000 3,387,000 455,000 8,298,000 -3,865,000 16,450,000 5,726,000 19,138,000 20,676,000 -27,078,000 17,253,000 14,088,000 12,079,000 13,405,000 11,025,000 9,039,000 2,927,000 3,272,000 9,661,000 5,265,000 7,117,000 7,507,000 9,573,000 12,171,000 13,567,000 13,260,000 16,657,000 13,896,000 10,358,000 -2,743,000 5,267,000 12,577,000 8,694,000 221,000 12,610,000 11,625,000 9,186,000 159,000 16,384,000 20,232,000 17,492,000 18,487,000 20,088,000 19,807,000 12,586,000 -6,462,000 -772,000 -1,831,000 -11,718,000 -5,003,000 12,482,000 10,963,000 7,635,000 18,603,000 15,884,000 12,046,000 36,172,000 9,651,000 10,169,000 7,686,000 4,228,000 5,779,000 4,802,000 3,761,000 6,666,000 
      income tax expense
    1,533,000 -3,242,000 2,698,000 4,016,000 3,246,000 2,178,000 768,000 4,864,000 1,204,000 238,000 2,963,000 4,347,000 4,580,000 3,131,250 4,432,000 5,072,000 3,021,000 -5,311,000 3,422,000 3,274,000 3,466,000 -2,004,000 -6,041,000 1,620,000 -762,000 1,699,000 2,263,000 3,598,000 3,770,000 -6,250,000 -2,713,000 2,944,000 1,515,000 21,637,000 1,705,000 1,726,000 -123,000 -3,506,000 1,616,000  1,749,000 792,000 2,637,000 3,293,000    3,922,000 3,027,000 -1,633,000 144,000 3,668,000 1,909,000 -2,282,000 4,496,000 3,696,000 3,068,000 3,722,500 2,857,000 6,360,000 5,674,000   6,088,000                      
      net income
    19,373,000 6,573,000 25,412,000 25,140,000 17,698,000 -48,851,000 22,294,000 19,036,000 13,409,000 19,468,000 26,564,000 24,082,000 25,588,000 28,764,000 19,952,000 23,255,000 14,019,000 19,683,000 18,156,000 17,868,000 16,767,000 5,391,000 6,496,000 6,678,000 -3,103,000 14,751,000 3,463,000 15,540,000 16,906,000 -20,828,000 19,966,000 11,144,000 10,564,000 -8,232,000 9,320,000 7,313,000 3,050,000 6,778,000 8,045,000 5,549,000 5,368,000 6,715,000 6,936,000 8,878,000 9,629,000 11,976,000 12,440,000 9,974,000 7,331,000 -1,110,000 5,123,000 8,909,000 6,785,000 2,503,000 8,114,000 7,929,000 6,118,000 762,000 13,527,000 13,872,000 11,818,000 12,629,000 13,358,000 13,719,000 6,721,000 -3,551,000 126,000 -785,000 -8,144,000 -3,305,000 9,909,000 7,158,000 4,596,000 12,324,000 9,908,000 7,939,000 23,114,000 7,087,000 6,968,000 5,227,000 3,908,000 5,530,000 4,286,000 3,431,000 6,571,000 
      yoy
    9.46% -113.46% 13.99% 32.07% 31.99% -350.93% -16.07% -20.95% -47.60% -32.32% 33.14% 3.56% 82.52% 46.14% 9.89% 30.15% -16.39% 265.11% 179.50% 167.57% -640.35% -63.45% 87.58% -57.03% -118.35% -170.82% -82.66% 39.45% 60.03% 153.01% 114.23% 52.39% 246.36% -221.45% 15.85% 31.79% -43.18% 0.94% 15.99% -37.50% -44.25% -43.93% -44.24% -10.99% 31.35% -1178.92% 142.83% 11.95% 8.05% -144.35% -36.86% 12.36% 10.90% 228.48% -40.02% -42.84% -48.23% -93.97% 1.27% 1.12% 75.84% -455.65% 10501.59% -1847.64% -182.53% 7.44% -98.73% -110.97% -277.20% -126.82% 0.01% -9.84% -80.12% 73.90% 42.19% 51.88% 491.45% 28.16% 62.58% 52.35% -40.53%     
      qoq
    194.74% -74.13% 1.08% 42.05% -136.23% -319.12% 17.11% 41.96% -31.12% -26.71% 10.31% -5.89% -11.04% 44.17% -14.20% 65.88% -28.78% 8.41% 1.61% 6.57% 211.02% -17.01% -2.73% -315.21% -121.04% 325.96% -77.72% -8.08% -181.17% -204.32% 79.16% 5.49% -228.33% -188.33% 27.44% 139.77% -55.00% -15.75% 44.98% 3.37% -20.06% -3.19% -21.87% -7.80% -19.60% -3.73% 24.72% 36.05% -760.45% -121.67% -42.50% 31.30% 171.07% -69.15% 2.33% 29.60% 702.89% -94.37% -2.49% 17.38% -6.42% -5.46% -2.63% 104.12% -289.27% -2918.25% -116.05% -90.36% 146.41% -133.35% 38.43% 55.74% -62.71% 24.38% 24.80% -65.65% 226.15% 1.71% 33.31% 33.75% -29.33% 29.02% 24.92% -47.79%  
      net income margin %
    3.52% 1.34% 5.71% 5.82% 4.21% -11.18% 5.10% 4.47% 3.48% 4.62% 6.59% 6.04% 5.78% 6.62% 4.66% 5.22% 3.12% 4.96% 4.68% 4.82% 4.73% 1.59% 2.26% 2.46% -1.12% 5.27% 1.13% 5.22% 5.61% -6.99% 6.72% 3.61% 3.48% -2.67% 3.17% 2.47% 1.27% 2.89% 3.22% 2.22% 2.28% 3.14% 2.84% 3.21% 3.32% 4.15% 4.27% 3.46% 2.83% -0.39% 1.86% 2.91% 2.27% 0.82% 2.79% 2.44% 1.73% 0.23% 3.44% 3.27% 3.15% 3.55% 4.11% 4.21% 2.28% -1.65% 0.07% -0.45% -6.02% -1.68% 4.12% 2.90% 2.03% 5.12% 4.29% 3.40% 9.23% 3.54% 3.72% 3.12% 2.88% 4.11% 3.29% 2.73% 5.11% 
      basic earnings per share:
                                                                                         
      net income per share
    0.93 0.32 1.23 1.21 0.85 -2.36 1.07 0.92 0.65 0.94 1.29 1.17 1.24 1.4 0.97 1.13 0.69 0.96 0.89 0.87 0.82 0.26 0.32 0.33 -0.15 0.73 0.17 0.76 0.83 -1.03 0.99 0.55 0.52 -0.41 0.47 0.37 0.15 0.34 0.4 0.28 0.27 0.34 0.35 0.44 0.48 0.59 0.61 0.48 0.36 -0.05 0.25 0.43 0.33 0.13 0.4 0.39 0.3 0.04 0.66 0.68 0.58 0.62 0.66 0.68 0.33                     
      diluted earnings per share:
                                                                                         
      weighted-average number of shares of common stock outstanding:
                                                                                         
      basic
    20,762 20,755 20,731 20,779 20,780 20,732 20,749 20,741 20,679 20,619 20,640 20,625 20,566 20,511 20,526 20,517 20,464 20,422 20,439 20,429 20,374 20,338 20,325 20,317 20,384 20,365 20,401 20,383 20,267 20,212 20,241 20,221 20,135 20,027 20,040 20,012 19,969 19,983 19,957 20,015 20,018 20,097 20,087 20,153 20,144 20,461 20,490 20,642 20,604 20,571 20,604 20,566 20,481 20,418 20,432 20,430 20,370 20,365                            
      diluted
    21,007 20,912 20,883 20,833 20,913 20,928 20,920 20,914 20,973 20,911 20,905 20,896 20,887 20,760 20,780 20,723 20,724 20,689 20,657 20,651 20,628 20,603 20,592 20,554 20,384 20,655 20,677 20,666 20,606 20,613 20,648 20,593 20,574 20,415 20,411 20,347 20,375 20,213 20,192 20,214 20,228 20,402 20,383 20,461 20,447 20,810 20,827 21,001 20,962 20,895 20,931 20,869 20,824 20,679 20,697 20,666 20,707 20,754                            
      other non-operating (income)—net
     -486,000 -711,000   -481,250 -642,000   -535,250 -685,000   -878,000 -1,175,000                                                                       
      goodwill impairment charges
                            9,053,000  11,560,000                                                           
      asset impairment charges
                         -294,000     2,581,000                                                           
      other non-operating expense—net
                         -717,750 -1,076,000 -851,000 -944,000 871,000 127,000 3,112,000 245,000 419,750 800,000 437,000 442,000                                                     
      held for sale impairment charges
                                                                                         
      held-for-sale impairment charges
                            1,713,000                                                             
      cash dividends per share
                                 0.105 0.105 0.105 0.1 0.1 0.1 0.1 0.095 0.095 0.095 0.095 0.09 0.09 0.09 0.09 0.085 0.085 0.085 0.085 0.08 0.08 0.08 0.08 0.075 0.075 0.075 0.075                              
      income tax (benefit) expense
                                           -284,000                          -1,379,500 -898,000 -1,046,000                  
      income tax benefit
                                                3,938,000 2,791,250 4,217,000               5,858,000 6,730,000  5,865,000                     
      selling, general and administrative expense
                                                 25,192,000 34,823,000 34,685,000 31,259,000 35,343,000 31,804,000 33,327,000 32,780,000 34,955,000 32,832,000 33,453,000 32,654,000 33,376,000 32,322,000 34,048,000 31,642,000 33,906,000 31,621,000 30,611,000 30,340,000 25,055,000 21,468,000 20,694,000 22,544,000 23,430,000 26,069,000 28,503,000 26,789,000 27,437,000 27,456,000 26,564,000 28,670,000 26,848,000 27,194,000 23,908,000 19,219,000 18,933,000 18,701,000   
      weighted-average number of shares of common stock outstanding
                                                                                         
      basic
    20,762 20,755 20,731 20,779 20,780 20,732 20,749 20,741 20,679 20,619 20,640 20,625 20,566 20,511 20,526 20,517 20,464 20,422 20,439 20,429 20,374 20,338 20,325 20,317 20,384 20,365 20,401 20,383 20,267 20,212 20,241 20,221 20,135 20,027 20,040 20,012 19,969 19,983 19,957 20,015 20,018 20,097 20,087 20,153 20,144 20,461 20,490 20,642 20,604 20,571 20,604 20,566 20,481 20,418 20,432 20,430 20,370 20,365                            
      diluted
    21,007 20,912 20,883 20,833 20,913 20,928 20,920 20,914 20,973 20,911 20,905 20,896 20,887 20,760 20,780 20,723 20,724 20,689 20,657 20,651 20,628 20,603 20,592 20,554 20,384 20,655 20,677 20,666 20,606 20,613 20,648 20,593 20,574 20,415 20,411 20,347 20,375 20,213 20,192 20,214 20,228 20,402 20,383 20,461 20,447 20,810 20,827 21,001 20,962 20,895 20,931 20,869 20,824 20,679 20,697 20,666 20,707 20,754                            
      other-net
                                                            3,788,000 3,438,000 5,016,000 5,064,000 3,671,000 2,739,500 3,928,000 2,946,000 4,084,000 1,446,000 2,554,000 1,474,000 1,755,000 2,046,250 4,335,000 3,089,000 761,000 1,384,250 1,679,000 1,325,000 2,533,000 1,258,000 377,000 325,000 -219,000  2,211,000 965,000 127,000 
      interest expense-net
                                                            698,000 501,250 807,000         271,000                  
      weighted-average number of common shares outstanding —basic
                                                              20,377                           
      weighted-average number of common shares outstanding —diluted
                                                              20,749                           
      interest expense – net
                                                               613,000                          
      weighted-average number of common shares outstanding — basic
                                                               20,421 20,356  20,273 20,323 20,257                     
      weighted-average number of common shares outstanding — diluted
                                                               20,832 20,796  20,553 20,600 20,467                     
      interest expense — net
                                                                585,000 520,000 835,000 691,000 619,000 480,000 221,000  326,000 471,000 539,000 649,000 336,000             
      per share of common stock: basic
                                                                     -0.11 0.01 -0.04 -0.4 0.265 0.49 0.35 0.23 0.505 0.49 0.39 1.15 0.36 0.36 0.27 0.2 0.29 0.22 0.18 0.39 
      weighted-average number of common shares outstanding
                                                                      20,215,000 20,186,000 20,133,000  20,374,000 20,399,000 20,389,000  20,392,000 20,351,000 20,153,000 19,784,000 19,593,000 19,260,751 19,227,082 19,224,298 19,197,476 18,936,641 16,704,568 
      per share of common stock: diluted
                                                                     -0.11 0.01 -0.04 -0.4 0.263 0.48 0.35 0.22 0.495 0.48 0.38 1.12 0.35 0.35 0.27 0.2 0.29 0.22 0.18 0.38 
      income taxes
                                                                        -3,574,000 2,354,250 2,573,000 3,805,000 3,039,000 5,785,250 5,976,000 4,107,000 13,058,000 2,564,000 3,201,000 2,459,000 320,000 249,000 516,000 330,000 95,000 
      interest expense
                                                                             220,000 286,000 571,000 683,000 983,000 1,125,000 1,143,000 1,575,000 1,646,000 1,622,000 1,955,000 2,389,000 
      other — net
                                                                                     1,453,000    
      selling, general and administrative expenses
                                                                                       18,773,000 19,161,000 
      research and development expenses
                                                                                       1,130,000 1,098,000 
      minority interest
                                                                                         
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-04-03 2025-12-31 2025-09-26 2025-06-27 2025-03-28 2024-12-31 2024-09-27 2024-06-28 2024-03-29 2023-12-31 2023-09-29 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-07-01 2022-04-01 2021-12-31 2021-10-01 2021-07-02 2021-04-02 2020-12-31 2020-09-25 2020-06-26 2020-03-27 2019-12-31 2019-09-27 2019-06-28 2019-03-29 2018-12-31 2018-09-28 2018-06-29 2018-03-30 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-07-01 2016-04-01 2015-12-31 2015-10-02 2015-07-03 2015-04-30 2014-12-31 2014-09-26 2014-06-27 2014-03-28 2013-12-31 2013-09-27 2013-06-28 2013-03-29 2012-12-31 2012-09-28 2012-06-29 2012-03-30 2011-12-31 2011-09-30 2011-07-01 2011-04-01 2010-12-31 2010-10-01 2010-07-02 2010-04-02 2009-12-31 2009-10-02 2009-07-03 2009-04-03 2008-12-31 2008-09-26 2008-06-27 2008-03-28 2007-12-31 2007-09-28 2007-06-29 2007-03-30 2006-09-29 2006-06-30 2006-03-31 2005-09-30 2005-07-01 2005-04-01 2004-10-01 2004-07-02 
                                                                                           
        assets
                                                                                           
        current assets
                                                                                           
        cash and cash equivalents
      16,189,000 13,681,000 16,411,000 12,591,000 15,634,000 16,713,000 17,874,000 17,098,000 13,104,000 13,294,000 16,401,000 16,574,000 15,243,000 13,101,000 20,682,000 32,175,000 20,237,000 14,462,000 18,009,000 24,345,000 18,934,000 25,878,000 117,754,000 265,068,000 107,576,000 125,007,000 94,526,000 74,856,000 41,864,000 70,645,000 53,612,000 42,895,000 20,206,000 41,844,000 22,486,000 18,497,000 16,341,000 31,464,000 15,806,000 20,985,000 18,868,000 24,236,000 24,826,000 20,629,000 21,938,000 13,150,000 19,610,000 18,062,000 19,313,000 22,774,000 20,157,000 15,726,000 20,242,000 16,056,000 10,894,000 15,430,000 15,146,000 12,255,000 8,965,000 9,461,000 12,007,000 16,104,000 15,424,000 16,081,000 11,117,000 12,253,000 26,909,000 21,042,000  18,546,000 7,143,000 15,163,000 12,270,000 31,730,000 16,967,000 12,074,000 16,108,000 11,818,000 12,591,000 5,946,000 23,153,000 11,206,000 9,677,000 27,007,000 10,325,000 
        accounts receivable
      267,209,000 222,916,000 195,289,000 198,377,000 219,320,000 193,793,000 214,576,000 185,244,000 188,282,000 192,747,000 186,177,000 188,166,000 207,998,000 215,211,000 238,975,000 222,811,000 237,712,000 223,553,000 190,601,000 179,326,000 180,544,000 166,447,000 150,454,000 146,527,000 138,803,000 154,751,000 165,477,000 142,327,000 144,952,000 130,538,000 133,894,000 135,699,000 134,174,000 124,014,000 125,417,000 133,674,000 115,497,000 100,817,000 118,826,000 111,752,000 112,921,000 97,236,000 113,961,000 117,178,000 117,126,000 112,780,000 126,950,000 121,766,000 121,527,000 112,767,000 121,987,000 129,831,000 129,812,000 126,482,000 138,877,000 123,042,000 139,372,000 117,761,000 156,557,000 149,386,000 153,404,000 139,374,000 133,552,000 145,265,000 113,407,000 83,997,000 78,308,000 74,114,000 74,378,000 89,845,000 110,153,000 120,113,000 113,930,000 97,424,000 116,877,000 114,097,000 95,710,000 104,390,000 87,586,000 85,962,000 67,513,000 67,939,000 65,863,000 72,579,000 67,950,000 
        inventories
      493,687,000 461,231,000 467,329,000 444,637,000 439,763,000 441,299,000 476,596,000 462,963,000 466,574,000 441,597,000 452,042,000 455,343,000 434,485,000 423,080,000 420,299,000 422,376,000 386,992,000 361,115,000 311,745,000 290,739,000 272,828,000 250,778,000 211,700,000 209,847,000 204,702,000 190,390,000 191,956,000 213,329,000 224,198,000 214,871,000 199,913,000 209,204,000 216,443,000 220,352,000 220,223,000 215,987,000 218,548,000 200,865,000 210,213,000 211,965,000 213,218,000 211,820,000 221,547,000 229,232,000 237,028,000 232,409,000 227,286,000 254,790,000 226,961,000 213,392,000 212,784,000 207,633,000 201,328,000 206,125,000 211,443,000 209,092,000 188,972,000 187,176,000 193,605,000 182,389,000 176,378,000 154,467,000 152,292,000 140,280,000 140,469,000 130,098,000 129,454,000 132,939,000 149,310,000 156,718,000 176,350,000 181,089,000 175,823,000 165,189,000 163,798,000 163,192,000 168,642,000 143,793,000 131,904,000 121,158,000 99,809,000 101,664,000 99,650,000 96,487,000 100,030,000 
        prepaid and other current assets
      98,664,000 91,692,000 97,296,000 79,508,000 84,325,000 72,419,000 86,314,000 73,811,000 71,748,000 61,744,000 54,972,000 37,750,000 42,128,000 39,056,000 29,708,000 29,606,000 27,971,000 28,122,000 36,138,000 22,155,000 22,449,000 20,896,000 24,515,000 29,191,000 20,515,000 21,839,000 23,658,000 23,904,000 23,832,000 23,299,000 19,894,000 19,617,000 25,584,000 24,733,000 19,115,000 22,162,000 14,157,000 12,138,000                                                
        total current assets
      875,749,000 789,520,000 776,325,000 735,113,000 759,042,000 724,224,000 795,360,000 739,116,000 739,708,000 709,382,000 709,592,000 697,833,000 699,854,000 690,448,000 709,664,000 706,968,000 672,912,000 627,252,000 556,493,000 516,565,000 494,755,000 463,999,000 504,423,000 656,444,000 478,784,000 491,987,000 475,617,000 454,416,000 434,846,000 439,353,000 407,313,000 407,415,000 396,407,000 410,943,000 387,241,000 390,320,000 364,543,000 345,284,000 358,716,000 358,365,000 357,862,000 346,091,000 389,155,000 399,837,000 406,600,000 386,694,000 401,042,000 421,608,000 415,786,000 394,505,000 401,502,000 392,686,000 398,993,000 400,989,000 416,132,000 398,566,000 395,625,000 370,901,000 414,160,000 391,624,000 388,095,000 355,725,000 341,405,000 344,125,000 310,417,000 280,176,000 280,302,000 267,260,000 269,581,000 294,379,000 320,115,000 342,935,000 328,338,000 329,436,000 317,229,000 307,880,000 299,042,000 276,185,000 251,718,000       
        deferred income taxes
      7,718,000 7,727,000 2,975,000 3,055,000 2,970,000 2,964,000 4,914,000 4,782,000 4,751,000 4,908,000 3,214,000 3,248,000 3,335,000 3,265,000 4,701,000 5,018,000 5,323,000 5,431,000 1,908,000 1,909,000 1,932,000 3,134,000 5,156,000 1,669,000 1,648,000 1,666,000 1,848,000 1,052,000 5,301,000 5,616,000 22,311,000   213,000 279,000 277,000 275,000 274,000 142,000 167,000 111,000  11,919,000 13,806,000 13,347,000 13,402,000 9,965,000 10,345,000 9,948,000 9,566,000 9,195,000 8,460,000 8,280,000 10,236,000 10,099,000 9,231,000 9,362,000 9,368,000 9,973,000 10,241,000 10,035,000 10,065,000 7,526,000 8,459,000 11,193,000 14,752,000 9,666,000 8,120,000 4,316,000 4,199,000 5,845,000 5,979,000 6,178,000 6,107,000 3,279,000 3,255,000 3,417,000 1,143,000 1,137,000 1,177,000 507,000 531,000 24,000 906,000 51,000 
        property, plant, and equipment
      1,390,729,000 1,376,703,000 1,380,432,000 1,357,772,000 1,339,968,000 1,315,586,000 1,328,355,000 1,321,083,000 1,304,336,000 1,281,622,000 1,252,455,000 1,232,787,000 1,198,350,000 1,209,205,000 1,173,073,000 1,164,273,000 1,149,458,000 1,132,223,000 1,069,592,000 1,052,464,000 1,021,174,000 998,312,000 987,902,000 924,620,000 910,050,000 916,965,000 909,254,000 913,325,000 908,481,000 898,251,000 896,626,000 894,306,000 886,653,000 891,789,000 877,002,000 872,618,000 868,037,000 861,267,000 862,474,000 856,795,000 848,495,000 833,834,000 826,286,000 811,645,000 813,806,000 800,671,000                            583,961,000            
        less allowances for depreciation, depletion, and amortization
      -860,870,000 -841,245,000 -841,102,000 -825,175,000 -817,843,000 -804,781,000 -802,294,000 -793,008,000 -779,893,000 -766,939,000 -755,626,000 -739,670,000 -728,788,000 -760,440,000 -746,966,000 -739,776,000 -732,529,000 -723,248,000 -715,158,000 -702,903,000 -692,101,000 -688,626,000 -693,223,000 -685,355,000 -675,074,000 -684,689,000 -675,039,000 -669,861,000 -656,326,000 -647,233,000 -642,931,000 -637,730,000 -629,953,000 -636,211,000 -632,435,000 -622,351,000 -612,286,000 -608,636,000 -602,084,000 -592,117,000 -581,200,000 -570,205,000 -565,086,000 -557,369,000 -565,456,000 -553,083,000 -545,183,000                                       
        operating lease, right-of-use assets
      59,024,000  63,648,000 75,363,000 75,788,000  58,871,000 60,217,000 62,055,000  57,747,000 60,207,000 62,352,000  65,716,000 68,045,000 70,862,000  56,556,000 58,833,000 59,826,000  62,235,000 48,942,000 36,465,000                                                             
        intangible assets
      102,739,000 105,874,000 108,059,000 107,627,000 106,932,000 109,312,000 124,281,000 126,015,000 129,053,000 133,571,000 134,594,000 137,937,000 140,430,000 143,219,000 145,089,000 148,364,000 152,922,000 156,736,000 49,012,000 50,851,000 51,503,000 54,672,000 54,449,000 5,732,000 5,972,000 6,380,000 6,692,000 5,213,000 5,808,000 6,461,000    9,847,000 10,771,000 12,074,000 13,353,000 11,074,000 10,706,000 10,936,000 12,167,000 13,736,000 14,312,000 15,717,000 17,109,000 18,559,000 20,046,000 21,534,000 22,751,000 24,248,000 25,908,000 26,594,000 27,406,000 28,869,000 30,131,000 31,783,000 32,923,000 34,580,000 34,465,000 34,207,000 35,213,000 36,849,000                        
        other assets
      21,975,000 21,529,000 22,362,000 21,757,000 21,245,000 22,140,000 26,384,000 25,922,000 25,231,000 21,664,000 27,186,000 25,140,000 22,183,000 22,535,000 32,475,000 30,228,000 30,063,000 27,369,000 23,269,000 21,724,000 20,791,000 19,364,000 20,754,000 19,169,000 18,399,000 17,937,000 17,452,000 15,280,000 7,725,000 7,236,000 7,114,000 6,991,000 7,376,000 6,992,000 6,312,000 6,183,000 6,214,000 5,950,000 4,925,000 5,760,000 5,996,000 6,716,000 5,023,000 4,985,000 4,868,000 4,781,000 4,693,000 4,851,000 4,799,000 3,874,000 3,767,000 4,240,000 3,682,000 3,767,000 5,348,000 5,286,000 7,948,000 7,073,000 7,973,000 7,831,000 1,839,000 1,900,000 40,606,000 42,082,000 43,501,000 42,014,000 30,082,000 32,228,000 33,419,000 34,444,000 36,058,000 32,781,000 33,574,000 11,804,000 13,152,000 12,886,000 13,193,000 17,869,000 18,256,000 18,118,000 8,513,000 8,785,000 14,172,000 15,523,000 16,006,000 
        goodwill
      280,335,000 280,657,000 280,474,000 265,695,000 264,255,000 263,738,000 321,147,000 319,752,000 319,943,000 320,873,000 319,435,000 320,229,000 320,268,000 319,498,000 318,571,000 319,994,000 317,897,000 318,620,000 140,990,000 142,054,000 140,392,000 144,916,000 143,118,000 70,001,000 69,832,000 79,011,000 78,961,000 90,633,000 90,600,000 90,657,000 90,762,000 90,697,000 90,922,000 90,677,000 89,720,000 90,035,000 89,732,000 86,950,000 86,725,000 86,725,000 86,725,000 86,725,000 86,725,000 86,725,000 86,725,000 86,725,000 86,725,000 88,753,000 88,753,000 88,753,000 88,753,000 88,753,000 88,753,000 88,753,000 86,467,000 86,527,000 84,641,000 84,036,000 72,936,000 72,936,000 72,936,000 72,936,000 70,479,000 70,479,000 74,395,000 67,034,000 35,778,000 35,778,000 35,778,000 35,778,000 35,699,000 39,799,000 40,380,000 21,899,000 21,782,000 21,782,000 21,843,000 15,390,000 15,369,000 19,097,000 10,805,000 10,805,000 7,992,000 7,992,000 7,992,000 
        total assets
      1,877,399,000 1,802,801,000 1,793,173,000 1,741,207,000 1,752,357,000 1,697,632,000 1,857,018,000 1,803,879,000 1,805,184,000 1,762,726,000 1,748,597,000 1,737,711,000 1,717,984,000 1,691,979,000 1,702,323,000 1,703,114,000 1,666,908,000 1,607,479,000 1,182,662,000 1,141,497,000 1,098,272,000 1,057,860,000 1,084,814,000 1,041,222,000 846,076,000 852,670,000 839,839,000 836,846,000 824,762,000 800,341,000 788,351,000 786,166,000 777,878,000 791,084,000 778,943,000 789,422,000 771,320,000 741,298,000 748,117,000 753,907,000 757,016,000 742,640,000 774,137,000 779,262,000 781,146,000 762,069,000 766,808,000 790,854,000 791,341,000 777,945,000 805,998,000 803,497,000 812,400,000 814,917,000 818,359,000 800,114,000 796,310,000 772,103,000 788,332,000 766,714,000 759,843,000 735,410,000 725,149,000 715,468,000 677,843,000 621,953,000 565,375,000 550,273,000 551,027,000 581,897,000   603,101,000 550,551,000            
        liabilities and shareholders’ equity
                                                                                           
        current liabilities
                                                                                           
        short-term debt
      23,050,000 22,445,000 10,166,000 19,880,000 52,573,000 34,274,000 37,542,000 38,765,000 46,569,000 38,597,000 38,634,000 27,471,000 27,727,000 21,105,000 19,747,000 15,333,000 15,351,000 15,359,000 529,000 435,000 1,541,000 1,937,000 122,216,000 151,731,000 877,000 868,000 857,000 847,000 836,000 823,000 807,000 798,000 787,000 777,000 767,000 3,140,000 6,929,000 733,000 12,803,000 14,823,000 23,109,000 8,998,000 15,234,000 3,427,000 667,000 653,000 6,613,000 33,368,000 41,832,000 35,566,000 36,013,000 36,562,000 48,665,000 49,432,000 57,455,000 57,250,000 58,055,000 40,944,000 46,657,000 39,331,000 56,395,000 47,835,000 39,816,000 42,161,000 50,456,000 56,148,000 35,895,000 26,869,000 41,177,000 30,622,000 32,246,000 35,624,000 39,772,000 24,903,000 29,908,000 30,718,000 23,169,000 31,598,000 24,798,000 27,301,000 16,730,000 10,973,000 10,948,000 15,018,000 25,516,000 
        accounts payable
      189,036,000 148,642,000 139,789,000 132,338,000 136,860,000 105,901,000 130,310,000 117,269,000 134,542,000 125,663,000 93,096,000 123,862,000 126,866,000 107,899,000 96,482,000 113,708,000 103,438,000 86,243,000 71,576,000 80,600,000 72,489,000 55,640,000 56,524,000 52,093,000 54,145,000 43,206,000 43,675,000 41,658,000 56,586,000 49,622,000 42,712,000 46,240,000 53,496,000 49,059,000 44,678,000 46,064,000 40,654,000 32,533,000 32,941,000 30,213,000 32,619,000 31,888,000 29,017,000 31,508,000 38,054,000 36,239,000 32,158,000 32,959,000 27,404,000 36,556,000 30,972,000 28,828,000 25,985,000 42,281,000 31,831,000 31,121,000 30,380,000 39,385,000 35,411,000 37,912,000 36,121,000 33,375,000 37,435,000 36,681,000 35,002,000 36,573,000 20,846,000 22,927,000 16,693,000 28,014,000 29,372,000 34,991,000 30,226,000 27,066,000 30,240,000 37,340,000 27,525,000 29,920,000 23,546,000 23,767,000 18,005,000 19,457,000 16,345,000 12,478,000 16,994,000 
        salaries and wages
      12,751,000 19,312,000 23,685,000 15,890,000 16,773,000 20,939,000 19,463,000 13,487,000 16,030,000 25,912,000 27,971,000 21,552,000 22,077,000 35,543,000 29,974,000 22,239,000 21,848,000 37,544,000 37,168,000 27,505,000 22,803,000 18,809,000 24,853,000 24,367,000 18,820,000 41,167,000 40,069,000 36,250,000 24,435,000 47,501,000 38,160,000 32,299,000 23,959,000 42,694,000 30,889,000 28,541,000 19,239,000 29,885,000 23,637,000 21,665,000 15,803,000 27,494,000    35,448,000    28,202,000    27,768,000    29,441,000  22,181,000  34,035,000    16,292,000    22,568,000    34,170,000            
        other liabilities and accrued items
      47,563,000 45,445,000 43,897,000 43,658,000 43,664,000 47,523,000 48,850,000 40,571,000 40,602,000 45,773,000 40,425,000 42,501,000 44,186,000 54,993,000 47,949,000 49,148,000 47,793,000 53,388,000 54,749,000 36,930,000 36,927,000 40,887,000 42,238,000 33,429,000 32,920,000 32,477,000 35,549,000 38,482,000 38,228,000 33,301,000 28,934,000 27,182,000 27,423,000 25,552,000 27,950,000 25,878,000 23,655,000 19,945,000 24,275,000 23,355,000 21,087,000 20,730,000 49,325,000 48,687,000 41,171,000 22,397,000 59,562,000 47,832,000 46,456,000 25,122,000 50,778,000 46,579,000 45,876,000 26,988,000 55,581,000 51,624,000 45,827,000 25,893,000 53,154,000 26,705,000 45,572,000 24,911,000 55,912,000 46,029,000 46,113,000 27,027,000 35,542,000 30,658,000 31,696,000 21,431,000 43,342,000 44,550,000 43,637,000 19,557,000 53,239,000 51,471,000 45,295,000 50,600,000 45,208,000 41,284,000 34,485,000 32,930,000 32,105,000 39,230,000 38,200,000 
        income taxes
      4,156,000 5,054,000 2,324,000 3,236,000 4,100,000 4,906,000 1,166,000 1,533,000 2,079,000 5,207,000 2,001,000 2,558,000 4,669,000 3,928,000 1,542,000 1,700,000 5,624,000 4,205,000 439,000 4,837,000 5,102,000 1,898,000 1,435,000 1,779,000 1,387,000 1,342,000 1,637,000 1,971,000 5,877,000 2,615,000 8,176,000 2,994,000 2,680,000 1,084,000 2,953,000 3,195,000 3,647,000 4,781,000 3,851,000 4,254,000 4,007,000 2,373,000 3,764,000 5,875,000 4,222,000 3,144,000 7,955,000 7,015,000 4,755,000 1,564,000   194,000    2,117,000    5,940,000 3,921,000 3,362,000 1,982,000 1,468,000 2,459,000     678,000  1,567,000 2,109,000 1,086,000 3,696,000 3,500,000 1,186,000 755,000 981,000 878,000 1,008,000 1,415,000 1,272,000 928,000 
        unearned revenue
      11,929,000 12,685,000 15,783,000 16,899,000 13,082,000 13,191,000 15,497,000 15,857,000 14,793,000 13,843,000 15,078,000 15,306,000 20,292,000 15,496,000 6,596,000 8,097,000 7,407,000 7,770,000 8,308,000 10,920,000 8,573,000 7,713,000 4,360,000 3,003,000 2,317,000 3,380,000 5,188,000 5,829,000 5,194,000 5,918,000 7,805,000 7,576,000 5,417,000 5,451,000 5,859,000 2,797,000 2,231,000 1,105,000 1,152,000 2,953,000 3,442,000 3,695,000 4,105,000 4,597,000 10,389,000 4,879,000 1,239,000 2,116,000 1,941,000 479,000 461,000 466,000 1,575,000 1,543,000 1,717,000 1,558,000 2,252,000 3,033,000 2,005,000 2,835,000 3,029,000 2,378,000 840,000 403,000 607,000 432,000 135,000 2,062,000 670,000 113,000 1,072,000 504,000 788,000 2,569,000 2,652,000 1,683,000 1,374,000 444,000 1,174,000 1,380,000   2,537,000 6,484,000  
        total current liabilities
      288,485,000 253,583,000 235,644,000 231,901,000 267,052,000 226,734,000 252,828,000 227,482,000 254,615,000 254,995,000 217,205,000 233,250,000 245,817,000 238,964,000 202,290,000 210,225,000 201,461,000 204,509,000 172,769,000 161,227,000 147,435,000 126,884,000 251,626,000 268,528,000 113,670,000 122,440,000 126,975,000 125,037,000 131,156,000 139,780,000 126,594,000 117,089,000 113,762,000 127,109,000 113,096,000 109,615,000 96,355,000 90,377,000 98,659,000 97,263,000 100,067,000 96,483,000 101,445,000 94,094,000 94,503,000 104,066,000 107,527,000 123,290,000 122,388,000 129,016,000 118,224,000 112,435,000 122,295,000 149,067,000 146,584,000 141,553,000 138,631,000 139,671,000 137,227,000 129,220,000 147,057,000 147,360,000 137,365,000 127,256,000 133,646,000 139,694,000 92,418,000 83,116,000 90,836,000 104,480,000 107,310,000 116,269,000 116,590,000 113,183,000 117,756,000 125,539,000 101,494,000 114,380,000 96,113,000       
        other long-term liabilities
      12,680,000 12,556,000 12,059,000 12,541,000 12,333,000 12,013,000 12,513,000 12,486,000 13,304,000 13,300,000 11,558,000 13,658,000 14,255,000 12,181,000 13,991,000 15,846,000 16,457,000 14,954,000 17,572,000 17,477,000 17,777,000 14,313,000 10,057,000 10,117,000 10,575,000 11,560,000 11,021,000 11,419,000 11,231,000 14,764,000 13,828,000 14,203,000 30,579,000 30,967,000 18,968,000 17,700,000 17,321,000 17,979,000 17,893,000 18,049,000 18,241,000 18,435,000 17,344,000 18,060,000 17,853,000 18,203,000 16,187,000 16,252,000 16,046,000 16,531,000 16,515,000 16,299,000 16,428,000 16,173,000 16,762,000 16,555,000 15,999,000 16,488,000 17,710,000 18,092,000 17,883,000 17,915,000 18,796,000 9,461,000 54,331,000 49,276,000 33,734,000 29,695,000 22,290,000 19,356,000 17,349,000 14,806,000 12,682,000 11,629,000 11,780,000 9,515,000 9,011,000 7,541,000 7,761,000 7,879,000 9,345,000 9,921,000 9,789,000 11,196,000 12,219,000 
        operating lease liabilities
      59,539,000 60,568,000 61,385,000 72,165,000 72,731,000 62,626,000 56,698,000 58,124,000 59,887,000 53,817,000 54,111,000 55,951,000 57,424,000 59,055,000 60,248,000 62,474,000 64,569,000 57,099,000 52,177,000 53,736,000 54,593,000 56,761,000 56,891,000 44,830,000 32,374,000 18,091,000 19,453,000 21,118,000 22,575,000                                                         
        finance lease liabilities
      12,950,000 13,384,000 13,418,000 13,612,000 12,707,000 12,404,000 13,438,000 13,005,000 13,242,000 13,744,000 13,279,000 13,824,000 14,068,000 13,876,000 13,009,000 14,360,000 15,192,000 16,327,000 17,285,000 18,410,000 18,937,000 20,539,000 20,540,000 16,939,000 16,652,000 17,424,000 17,535,000 18,325,000 18,502,000                                                         
        retirement and post-employment benefits
      23,360,000 23,931,000 27,038,000 27,185,000 25,341,000 26,411,000 26,178,000 25,226,000 25,431,000 26,334,000 20,089,000 20,591,000 20,738,000 20,422,000 29,421,000 30,992,000 32,704,000 33,394,000 39,216,000 40,001,000 39,662,000 41,877,000 40,208,000 32,389,000 31,444,000 32,466,000 31,026,000 30,663,000 37,813,000 38,853,000 56,068,000 80,944,000 85,660,000 93,225,000 92,014,000 94,549,000 92,623,000 91,505,000 84,003,000 86,864,000 90,298,000 92,794,000 98,093,000 100,782,000 99,701,000 103,891,000 53,493,000 56,949,000 59,970,000 80,275,000 122,000,000 123,448,000 125,514,000 125,978,000 98,421,000 102,207,000 103,505,000 105,115,000 68,049,000 81,588,000 82,032,000 82,502,000 73,294,000 78,645,000 80,135,000 82,354,000 80,515,000 81,412,000 82,191,000 97,168,000 57,426,000 59,381,000 59,331,000 57,511,000 59,200,000 57,251,000 56,244,000 66,732,000 68,023,000 66,574,000 56,770,000 56,044,000 50,370,000 51,003,000 50,439,000 
        unearned income
      53,303,000 55,862,000 56,990,000 61,642,000 70,225,000 75,769,000 81,553,000 89,418,000 95,978,000 103,983,000 109,076,000 111,598,000 109,883,000 107,736,000 110,723,000 108,126,000 96,971,000 97,962,000 93,061,000 95,290,000 92,301,000 86,761,000 72,632,000 57,799,000 39,091,000 32,891,000 29,270,000 30,354,000 31,478,000 32,563,000 33,649,000 34,734,000 35,820,000 36,905,000 37,991,000 39,076,000 40,223,000 41,369,000 42,515,000 43,661,000 44,807,000 45,953,000 47,099,000 48,523,000 49,469,000 51,796,000 52,970,000 54,143,000 55,317,000 56,490,000 57,664,000 58,837,000 60,011,000 61,184,000 57,859,000 59,296,000 63,104,000 62,540,000 60,071,000 59,724,000 58,267,000 57,154,000 57,538,000 54,612,000                      
        long-term income taxes
      536,000 532,000 2,135,000 2,449,000 1,998,000 1,818,000 4,551,000 3,696,000 3,686,000 3,815,000 1,155,000 827,000 812,000 665,000 1,257,000 1,206,000 1,205,000 1,190,000    2,689,000 3,365,000 3,508,000 3,480,000 3,451,000 3,121,000 3,093,000 3,067,000 2,993,000 3,064,000 4,896,000 4,867,000 4,857,000 1,593,000 1,994,000 1,994,000 2,100,000 1,179,000 1,293,000 1,293,000 1,293,000 1,750,000 1,750,000 1,750,000 1,750,000 1,576,000 1,576,000 1,576,000 1,576,000 1,510,000 1,510,000 1,510,000 1,510,000 1,385,000 1,793,000 1,793,000 1,793,000 2,905,000 2,905,000 2,905,000 2,906,000 2,329,000 2,329,000 2,329,000 2,329,000 3,029,000 3,029,000 3,028,000 3,028,000 3,386,000 4,327,000 4,327,000 4,327,000 4,331,000 4,331,000 4,331,000         
        long-term debt
      466,871,000 436,348,000 446,772,000 405,697,000 398,744,000 407,734,000 457,756,000 445,990,000 428,710,000 387,576,000 422,361,000 412,733,000 405,482,000 410,876,000 474,280,000 481,965,000 479,821,000 434,388,000 79,036,000 58,838,000 51,407,000 36,542,000 6,374,000  1,126,000 1,260,000 1,467,000 1,669,000 1,869,000 2,066,000 2,331,000 2,453,000 2,643,000 2,827,000 3,010,000 23,254,000 25,430,000 3,605,000 3,776,000 13,884,000 14,052,000 4,615,000 31,038,000 41,213,000 50,787,000 23,613,000 43,780,000 46,945,000 51,107,000 29,267,000 52,423,000 59,578,000 64,730,000 44,880,000 65,028,000 58,176,000 60,320,000 40,463,000 65,640,000 55,693,000 48,305,000 38,305,000 58,305,000 78,305,000 58,305,000 8,305,000 10,905,000 10,905,000 10,905,000 10,605,000 25,305,000 50,905,000 50,005,000 10,005,000 9,645,000 10,246,000 30,246,000 48,282,000 53,882,000 58,882,000 40,916,000 41,515,000 41,515,000 57,863,000 78,581,000 
        shareholders’ equity
                                                      478,874,000  437,278,000 430,776,000 421,108,000  430,127,000 420,534,000 412,103,000  428,337,000 415,482,000 399,228,000  375,458,000 362,951,000 347,327,000  344,047,000 341,346,000 340,042,000  380,135,000 369,343,000 359,674,000  337,069,000 326,577,000 316,589,000 246,610,000 237,585,000 219,107,000 216,340,000 211,732,000 214,940,000 211,050,000 168,350,000 
        serial preferred stock
                                                                                           
        common stock
      368,264,000 351,901,000 349,247,000 345,666,000 342,759,000 336,136,000 331,646,000 328,836,000 324,492,000 309,492,000 306,593,000 303,390,000 297,802,000 288,100,000 284,024,000 281,296,000 278,589,000 271,978,000 269,716,000 268,205,000 264,940,000 258,642,000 257,019,000 256,756,000 253,967,000 249,674,000 247,651,000 245,785,000 241,480,000 234,704,000 232,846,000 230,763,000 227,694,000 223,484,000 219,817,000 218,902,000 216,527,000 212,702,000 212,168,000 211,275,000 210,175,000 208,967,000 207,432,000 203,125,000 201,838,000 202,104,000 201,030,000 200,078,000  197,576,000    191,169,000    185,913,000    180,161,000    173,776,000    170,597,000    167,347,000            
        retained earnings
      928,796,000 912,361,000 908,691,000 886,247,000 864,002,000 849,111,000 900,764,000 881,284,000 865,038,000 854,334,000 837,598,000 813,793,000 792,421,000 769,418,000 743,283,000 725,918,000 705,255,000 693,756,000 676,527,000 660,851,000 645,468,000 631,058,000 592,980,000 588,803,000 584,505,000 589,888,000 577,409,000 576,211,000 562,941,000 548,374,000 571,350,000 553,523,000 545,093,000 536,116,000 531,683,000 524,367,000 519,058,000 517,903,000 513,020,000 506,872,000 503,226,000 499,659,000 494,745,000 491,262,000 484,198,000 476,277,000 466,047,000 455,379,000  441,518,000    428,394,000        368,401,000    321,974,000    334,329,000    315,972,000            
        common stock in treasury
      -295,362,000 -277,473,000 -277,103,000 -276,447,000 -267,756,000 -261,880,000 -259,191,000 -258,583,000 -256,268,000 -237,746,000 -237,259,000 -236,423,000 -231,906,000 -220,864,000 -219,219,000 -218,356,000 -217,549,000 -209,920,000 -208,952,000 -208,854,000 -206,845,000 -199,187,000 -199,185,000 -198,726,000 -198,311,000 -186,845,000 -187,464,000 -187,224,000 -184,812,000 -175,426,000 -174,532,000 -173,825,000 -171,574,000 -166,128,000 -161,030,000 -160,785,000 -157,642,000 -154,399,000 -153,899,000 -152,755,000 -150,137,000 -148,559,000 -148,461,000 -144,185,000 -141,717,000 -140,938,000 -134,281,000 -121,306,000  -118,151,000    -118,298,000                                
        accumulated other comprehensive loss
      -51,870,000 -50,581,000 -53,259,000 -51,760,000 -57,699,000 -61,046,000 -47,822,000 -50,887,000 -49,321,000 -46,948,000 -40,828,000 -39,443,000 -41,626,000 -41,909,000 -46,580,000 -44,619,000 -40,186,000 -40,169,000 -44,553,000 -43,084,000 -46,087,000 -38,639,000 -42,781,000 -45,571,000 -47,173,000 -45,462,000 -43,858,000 -43,978,000 -57,270,000 -58,234,000 -97,358,000 -99,106,000 -101,221,000 -102,937,000 -82,890,000 -83,922,000 -84,782,000 -86,181,000 -75,353,000 -76,625,000 -78,769,000                                             
        other equity
      7,135,000 7,069,000 7,003,000 6,939,000 6,623,000 6,560,000 6,498,000 6,435,000 5,982,000 5,921,000 5,864,000 5,806,000 5,303,000 5,245,000 5,169,000 4,915,000 4,855,000 4,795,000 4,690,000 4,583,000 3,860,000 3,756,000 3,748,000 3,678,000 3,490,000 3,422,000 4,058,000 3,991,000 4,538,000 4,488,000                                                        
        total shareholders' equity
      956,963,000  934,579,000 910,645,000 887,929,000  931,895,000 907,085,000 889,923,000  871,968,000 847,123,000 821,994,000  766,677,000 749,154,000 730,964,000  697,428,000 681,701,000 661,336,000  611,781,000 604,940,000 596,478,000  597,796,000 594,785,000 566,877,000  536,743,000 515,741,000 504,329,000  511,992,000 502,957,000 497,099,000  499,950,000 492,726,000 488,147,000  475,136,000 471,463,000 464,917,000  486,380,000 487,857,000                                      
        total liabilities and shareholders’ equity
      1,877,399,000 1,802,801,000 1,793,173,000 1,741,207,000 1,752,357,000 1,697,632,000 1,857,018,000 1,803,879,000 1,805,184,000 1,762,726,000 1,748,597,000 1,737,711,000 1,717,984,000 1,691,979,000 1,702,323,000 1,703,114,000 1,666,908,000 1,607,479,000 1,182,662,000 1,141,497,000 1,098,272,000 1,057,860,000 1,084,814,000 1,041,222,000 846,076,000 852,670,000 839,839,000 836,846,000 824,762,000 800,341,000 788,351,000 786,166,000 777,878,000 791,084,000 778,943,000 789,422,000 771,320,000 741,298,000 748,117,000 753,907,000 757,016,000 742,640,000 774,137,000 779,262,000 781,146,000 762,069,000 766,808,000 790,854,000 791,341,000 777,945,000 805,998,000 803,497,000 812,400,000 814,917,000 818,359,000 800,114,000 796,310,000 772,103,000 788,332,000 766,714,000 759,843,000 735,410,000 725,149,000 715,468,000 677,843,000 621,953,000 565,375,000 550,273,000 551,027,000 581,897,000   603,101,000 550,551,000            
        property, plant, and equipment — net
       535,458,000    510,805,000    514,683,000    448,765,000    408,975,000    309,686,000    232,276,000    251,018,000    255,578,000    252,631,000    263,629,000    247,588,000            263,813,000        227,766,000    207,254,000    186,175,000            
        operating lease, right-of-use asset
       62,036,000    64,449,000    57,645,000    64,249,000    63,096,000    62,089,000    23,413,000 25,054,000 26,788,000 28,327,000                                                         
        total shareholders’ equity
       943,277,000    868,881,000    885,053,000    799,990,000    720,440,000    655,630,000    610,677,000    553,906,000    494,981,000    494,089,000    482,957,000    458,133,000    463,321,000    414,995,000    405,982,000    384,356,000    339,859,000    347,097,000    353,714,000            
        assets held for sale
                             5,811,000 7,188,000                                                             
        property, plant, and equipment—net
                             239,265,000 234,976,000  234,215,000 243,464,000 252,155,000  253,695,000 256,576,000 256,700,000  244,567,000 250,267,000 255,751,000  260,390,000 264,678,000 267,295,000  261,200,000 254,276,000 248,350,000  248,800,000                                       
        liabilities held for sale
                             2,126,000 3,204,000                                                             
        capital lease obligations
                                   15,221,000 15,864,000 15,896,000                                                      
        intangible assets—net
                                    7,156,000 7,899,000 8,857,000                                                     
        other equity transactions
                                    4,437,000 4,386,000 4,337,000 4,446,000 4,412,000 4,395,000 3,938,000 4,064,000 4,014,000 3,959,000 3,652,000 3,595,000 3,625,000 3,549,000 3,000,000 2,927,000 2,895,000 2,867,000  2,266,000    2,159,000    2,183,000    2,500,000    2,163,000    837,000    549,000            
        long-term deferred income taxes
                                     16,588,000 17,616,000 17,047,000 40,332,000 40,543,000 41,727,000 39,409,000 26,655,000 27,443,000 26,971,000 25,743,000 17,722,000 17,722,000 17,494,000 17,722,000 5,502,000 2,049,000 4,285,000 4,672,000 20,749,000 20,483,000 20,482,000 19,946,000 11,627,000 12,930,000 12,857,000 11,627,000 2,042,000 2,042,000 2,042,000 2,042,000 2,403,000 4,873,000 4,873,000 4,873,000 9,945,000 9,945,000 9,944,000 9,944,000    1,139,000 4,655,000 9,785,000 7,315,000   1,259,000 650,000 658,000 925,000 742,000 1,393,000 
        taxes other than income taxes
                                       2,492,000    1,395,000    1,305,000    1,306,000    1,527,000    1,055,000      256,000  905,000    763,000    1,132,000    2,209,000            
        prepaid expenses
                                            13,871,000 13,663,000 12,855,000 12,799,000 16,902,000 18,992,000 17,161,000 14,953,000 17,231,000 16,645,000 38,037,000 35,761,000 36,995,000 30,591,000 39,240,000 41,685,000 44,610,000 41,042,000 40,644,000 39,739,000 42,588,000 37,468,000 33,241,000 31,743,000 31,777,000 29,213,000 28,932,000 28,020,000 25,874,000 26,406,000 28,660,000 23,660,000 20,624,000 19,635,000 20,137,000 17,723,000 16,308,000 15,262,000 15,165,000 15,041,000 18,500,000 16,752,000 11,063,000 9,283,000 7,617,000 5,934,000 5,674,000 
        other comprehensive income
                                               -80,705,000 -82,205,000 -82,288,000 -82,402,000 -82,237,000 -49,311,000 -49,161,000  -59,888,000    -88,429,000    -72,215,000    -51,616,000    -46,684,000    -47,801,000    -24,576,000            
        property, plant, and equipment—cost
                                                    793,983,000                                       
        property, plant and equipment—cost
                                                     790,154,000 784,513,000  779,870,000 794,389,000 787,354,000  769,985,000 770,766,000                              
        less allowances for depreciation, depletion and amortization
                                                     -538,095,000 -529,546,000  -514,562,000 -523,659,000 -514,321,000  -501,382,000 -505,795,000 -499,206,000  -481,400,000 -473,743,000   -457,561,000 -449,667,000 -443,136,000 -437,595,000 438,083,000 438,412,000 430,146,000  421,611,000 414,606,000 407,461,000  392,647,000 388,142,000 384,542,000         
        property, plant and equipment—net
                                                     252,059,000 254,967,000  265,308,000 270,730,000 273,033,000  268,603,000 264,971,000                              
        other receivables
                                                       245,000 384,000 445,000 91,000 405,000 209,000 729,000 2,129,000 4,602,000 2,472,000 2,679,000 3,030,000 3,972,000 834,000 4,827,000 5,299,000 11,056,000 10,091,000 4,639,000  1,411,000    11,263,000            
        property, plant and equipment
                                                       782,879,000    779,785,000    753,326,000   724,188,000 719,953,000    665,361,000 647,253,000 643,376,000 632,353,000 635,266,000 622,375,000 614,577,000 608,172,000  575,512,000 569,298,000 561,099,000 558,424,000 556,224,000 551,110,000 550,239,000 547,828,000 542,768,000 538,844,000 537,679,000 
        less allowances for depreciation, amortization and depletion
                                                       -520,986,000    -507,243,000    -489,513,000   -464,560,000 -454,085,000        -428,012,000    -397,786,000            
        property, plant and equipment — net
                                                       261,893,000    272,542,000   262,265,000  256,666,000 257,984,000 259,628,000  270,166,000 253,819,000 244,567,000                     
        related-party notes receivable
                                                        11,000 11,000 51,000 51,000 51,000 51,000 51,000 73,000 90,000 90,000 90,000 90,000 90,000 90,000 90,000 90,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 98,000 358,000      
        property, plant and equipment — cost
                                                              761,471,000  738,066,000 731,727,000   727,727,000 703,486,000 687,703,000                     
        taxes other than income taxes .
                                                               975,000                            
        serial preferred stock, no par value; 5,000 authorized shares, none issued
                                                                                           
        retained earnings .
                                                               408,380,000                            
        common stock in treasury; 6,716 shares in 2011 and 6,648 shares in 2010
                                                               -118,279,000                            
        property, plant and equipment – net
                                                                   265,868,000                        
        serial preferred stock, no par value; 5,000 authorized shares; none issued
                                                                                           
        common stock in treasury; 6,648 shares in 2010 and 6,566 shares in 2009
                                                                   -115,090,000                        
        current portion of long-term debt
                                                                         600,000 600,000 600,000 600,000 600,000 600,000 600,000 631,000 631,000 631,000 632,000 632,000 632,000 635,000 636,000 636,000   
        serial preferred stock, no par value; 5,000,000 authorized shares, none issued
                                                                                           
        common stock in treasury, 6,566,000 shares in 2009 and 6,598,000 shares in 2008
                                                                       -111,370,000                    
        current assets cash and cash equivalents
                                                                          12,917,000                 
        common stock in treasury, 6,477,000 shares in 2008 and 6,237,000 shares in 2007
                                                                           -110,865,000                
        prepaid income taxes
                                                                             956,000              
        common stock in treasury, 6,237,000 shares in 2007 and 6,293,000 shares in 2006
                                                                               -105,578,000            
        less allowances for depreciation, depletion and impairment
                                                                                   381,426,000 377,005,000 372,998,000 378,148,000 374,483,000 368,088,000 360,420,000 355,873,000 
        current liabilities - sum
                                                                                     447,939,000 394,104,000 384,216,000 380,600,000 405,594,000 391,227,000 
        minority interest in subsidiary
                                                                                           
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-04-03 2025-12-31 2025-09-26 2025-06-27 2025-03-28 2024-12-31 2024-09-27 2024-06-28 2024-03-29 2023-12-31 2023-09-29 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-07-01 2022-04-01 2021-12-31 2021-10-01 2021-07-02 2021-04-02 2020-12-31 2020-09-25 2020-06-26 2020-03-27 2019-12-31 2019-09-27 2019-06-28 2019-03-29 2018-12-31 2018-09-28 2018-06-29 2018-03-30 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-07-01 2016-04-01 2015-12-31 2015-10-02 2015-07-03 2015-04-30 2014-12-31 2014-06-27 2014-03-28 2013-12-31 2013-06-28 2013-03-29 2012-12-31 2012-06-29 2012-03-30 2011-12-31 2011-07-01 2011-04-01 2010-12-31 2010-07-02 2009-12-31 2008-12-31 2008-06-27 2008-03-28 2007-12-31 2007-06-29 2007-03-30 2006-06-30 2006-03-31 2005-07-01 2005-04-01 2004-07-02 
                                                                               
          cash flows from operating activities:
                                                                               
          net income
        19,373,000 6,573,000 25,412,000 25,140,000 17,698,000 -48,851,000 22,294,000 19,036,000 13,409,000 19,468,000 26,564,000 24,082,000 25,588,000 28,764,000 19,952,000 23,255,000 14,019,000 19,683,000 18,156,000 17,868,000 16,767,000 5,391,000 6,496,000 6,678,000 -3,103,000 14,751,000 3,463,000 15,540,000 16,906,000 -20,828,000 19,966,000 11,144,000 10,564,000 -8,232,000 9,320,000 7,313,000 3,050,000 6,778,000 8,045,000 5,549,000 5,368,000 6,715,000 6,936,000 8,878,000 9,629,000 11,976,000 17,305,000 7,331,000 -1,110,000 15,694,000 6,785,000 2,503,000 14,047,000 6,118,000 762,000 25,690,000 11,818,000 12,629,000 20,440,000 -3,551,000 -3,305,000 11,754,000 4,596,000 12,324,000 31,053,000 23,114,000 12,195,000 5,227,000 9,817,000 4,286,000 10,324,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                               
          depreciation, depletion, and amortization
        18,426,000 17,523,000 17,504,000 17,509,000 16,538,000 17,385,000 18,593,000 16,513,000 16,185,000 15,120,000 15,080,000 16,352,000 15,092,000 14,213,000 13,153,000 12,891,000 13,179,000 11,659,000 13,415,000 10,464,000 8,599,000 10,342,000 8,520,000 9,248,000 14,274,000 9,161,000 9,348,000 13,540,000 9,067,000 9,018,000 8,157,000 9,142,000 9,207,000 9,307,000 12,719,000 10,635,000 10,090,000 11,272,000 10,882,000 12,189,000 11,308,000 11,748,000 5,952,000 8,208,000 11,909,000 10,388,000                          
          amortization of deferred financing costs in interest expense
        239,000 240,000 235,000 962,000 450,000 428,000 429,000 428,000 429,000 428,000 429,000 431,000 424,000 424,000 530,000 269,000 511,000 421,000 182,000 182,000 182,000 243,000 183,000 182,000 182,000 242,000 248,000 236,000 236,000 289,000 206,000 253,000 261,000 249,000 230,000 210,000 230,000 249,000 136,000 130,000 151,000 157,000 166,000 183,000 148,000 168,000 356,000 178,000 178,000 325,000 162,000 162,000 325,000 157,000 218,000 233,000 117,000 119,000 282,000 117,000 106,000 177,000 90,000 95,000 215,000 107,000 301,000 139,000 579,000 304,000 722,000 
          stock-based compensation expense
        3,371,000 2,405,000 3,083,000 2,451,000 2,986,000 2,845,000 2,381,000 2,839,000 2,495,000 2,514,000 2,536,000 2,792,000 2,250,000 2,816,000 2,303,000 1,995,000 1,699,000 1,593,000 1,412,000 2,039,000 1,473,000 1,539,000 23,000 2,474,000 1,492,000 1,940,000 1,689,000 1,994,000 1,547,000    771,000 654,000 796,000 1,169,000 2,338,000 294,000 961,000 1,031,000 888,000 973,000 1,863,000 1,365,000 1,290,000 1,323,000 3,027,000 1,412,000 1,638,000 2,676,000 1,199,000 1,546,000 2,828,000 1,411,000 1,407,000 2,191,000 990,000 1,066,000 1,988,000 929,000 -858,000 2,460,000 1,257,000 1,004,000 1,932,000 939,000 255,000     
          deferred income tax (benefit) expense
        -3,000    22,000    -253,000    -52,000    401,000                      813,000 -371,000 -1,118,000                               
          changes in assets and liabilities:
                                                                               
          accounts receivable
        -45,097,000  2,650,000 23,963,000 -24,912,000  -27,195,000 2,545,000 2,729,000  946,000 19,348,000 7,538,000  -18,398,000 12,479,000 -15,045,000  -12,100,000 1,756,000 -15,697,000                                                   
          inventory
        -28,916,000  -22,074,000 -327,000 421,000  -9,903,000 2,227,000 -26,539,000  5,583,000 -24,370,000 -12,081,000  2,472,000 -39,175,000 -28,129,000  -21,702,000 -17,432,000 -23,219,000                                                   
          prepaid and other current assets
        -8,406,000  -18,060,000 7,399,000 -10,428,000  -12,152,000 -2,220,000 -10,274,000  -17,385,000 4,075,000 -2,865,000  -557,000 -2,457,000 -5,000  -5,302,000 389,000 -2,107,000                                                   
          accounts payable and accrued expenses
        36,420,000  17,339,000 -14,998,000 19,191,000  24,567,000 -15,669,000 -5,194,000  -14,950,000 -8,679,000 -1,904,000  -10,682,000 13,074,000 -4,177,000   9,179,000 19,224,000                                                   
          unearned revenue
        -1,956,000  -4,617,000 -3,909,000 -4,616,000  -7,228,000 -4,480,000 -5,860,000  -3,176,000 -9,476,000 254,000  -2,050,000 202,000 -343,000  -2,596,000 2,314,000 932,000                                                   
          interest and taxes payable
        -179,000  -320,000 -826,000 -404,000  673,000 -612,000 -3,294,000  -289,000 -2,098,000 657,000  24,000 -3,639,000 1,874,000  -4,372,000 -296,000 3,164,000                                                   
          other-net
        2,421,000  -2,852,000 -7,377,000 -1,444,000  -6,437,000 -1,504,000 2,362,000  -2,987,000 2,737,000 -4,520,000  1,741,000 2,201,000 1,712,000  2,100,000 14,000 -140,000  -3,697,000 -7,847,000 4,865,000  677,000 -1,879,000 -924,000  390,000 3,387,000 -818,000  -236,000 -128,000 -960,000  840,000 1,618,000 -847,000  563,000 -188,000 -321,000  -3,111,000 -2,821,000  1,906,000 833,000  161,000                   
          net cash from operating activities
        -4,307,000 19,519,000 18,282,000 49,940,000 15,502,000 76,253,000 5,087,000 20,282,000 -13,805,000 59,909,000 13,983,000 32,417,000 38,105,000 81,754,000 12,789,000 35,719,000 -14,304,000 49,723,000 -3,547,000 28,615,000 15,450,000 21,613,000 43,011,000 27,303,000 9,130,000 39,686,000 29,490,000 42,663,000 -12,617,000 27,131,000 19,939,000 37,479,000 -8,175,000 32,298,000 35,194,000 17,132,000 -16,829,000 40,820,000 17,320,000 26,478,000 -17,444,000  23,801,000     -23,211,000 37,407,000 18,120,000 -4,766,000 45,994,000 -9,047,000 -22,972,000  -7,137,000 -20,754,000     10,305,000 -3,079,000 29,151,000 11,448,000 -4,666,000      
          capital expenditures
        -15,289,000 -14,538,000 -13,738,000 -12,682,000 -12,321,000 -17,919,000 -12,318,000 -17,098,000 -21,314,000 -25,299,000 -25,782,000 -29,455,000 -30,014,000 -23,372,000 -16,506,000 -18,753,000 -18,977,000 -25,270,000 -19,928,000 -26,462,000 -31,250,000 -20,989,000 -14,251,000 -17,245,000 -14,789,000 -6,058,000 -4,360,000 -5,806,000 -8,027,000 -5,893,000 -4,656,000 -9,286,000 -7,867,000 -9,757,000 -6,507,000 -5,124,000 -6,128,000 -7,125,000 -5,726,000 -8,612,000 -5,714,000  -7,521,000     -6,120,000 -8,018,000 -13,023,000 -5,781,000 -8,753,000 -17,957,000 -9,282,000  -11,103,000 -3,869,000     -14,637,000 -7,048,000 -8,785,000 -11,156,000 -4,845,000      
          free cash flows
        -19,596,000 4,981,000 4,544,000 37,258,000 3,181,000 58,334,000 -7,231,000 3,184,000 -35,119,000 34,610,000 -11,799,000 2,962,000 8,091,000 58,382,000 -3,717,000 16,966,000 -33,281,000 24,453,000 -23,475,000 2,153,000 -15,800,000 624,000 28,760,000 10,058,000 -5,659,000 33,628,000 25,130,000 36,857,000 -20,644,000 21,238,000 15,283,000 28,193,000 -16,042,000 22,541,000 28,687,000 12,008,000 -22,957,000 33,695,000 11,594,000 17,866,000 -23,158,000  16,280,000     -29,331,000 29,389,000 5,097,000 -10,547,000 37,241,000 -27,004,000 -32,254,000  -18,240,000 -24,623,000     -4,332,000 -10,127,000 20,366,000 292,000 -9,511,000      
          cash flows from investing activities:
                                                                               
          payments for purchase of property, plant, and equipment
        -15,289,000 -14,538,000 -13,738,000 -12,682,000 -12,321,000 -17,919,000 -12,318,000 -17,098,000 -21,314,000 -25,299,000 -25,782,000 -29,455,000 -30,014,000 -23,372,000 -16,506,000 -18,753,000 -18,977,000 -25,270,000 -19,928,000 -26,462,000 -31,250,000 -20,989,000 -14,251,000 -17,245,000 -14,789,000 -6,058,000 -4,360,000 -5,806,000 -8,027,000 -5,893,000 -4,656,000 -9,286,000 -7,867,000 -9,757,000 -6,507,000 -5,124,000 -6,128,000 -7,125,000 -5,726,000 -8,612,000 -5,714,000 -5,420,000 -7,521,000 -9,368,000 -7,196,000 -9,469,000                          
          payments for mine development
        -60,000 -6,336,000 -9,777,000 -1,492,000 -8,683,000 -1,783,000 -1,000 -5,042,000 -5,333,000 -5,709,000               -374,000 -312,000 -239,000 -1,352,000 -1,366,000 -1,767,000 -1,764,000 -1,661,000 -940,000 -111,000 -309,000 -200,000 -927,000 -1,128,000 -3,024,000 -4,782,000 -5,613,000 -6,872,000 -6,352,000 -3,748,000 -577,000 -337,000 -80,000 -369,000 -4,382,000 -3,874,000 -5,581,000 -822,000 -159,000 -258,000 -183,000 -127,000 -282,000 -7,425,000 -348,000 -30,000 -152,000 -21,000 -343,000 -6,195,000 -1,974,000 -46,000 -13,000   -120,000 
          proceeds from sale of property, plant, and equipment
         666,000 266,000 642,000 34,000 179,000 348,000 237,000 8,000 197,000 212,000 23,000 722,000 94,000 11,000 195,000 83,000 28,000 575,000 -2,000 2,000 23,000 10,000 27,000 2,000 -43,000 58,000 406,000 -1,000 24,000 3,000 2,169,000 26,000 11,000 16,000 67,000 539,000 75,000 752,000 15,000 25,000   6,000                          
          net cash from investing activities
        -15,349,000 -20,874,000 -42,349,000 -14,174,000 -20,738,000 -19,060,000 -12,285,000 -21,961,000 -26,299,000 -25,062,000 -31,483,000 -32,875,000 -29,802,000 -23,349,000 -15,784,000 -21,630,000 -18,966,000 -417,315,000 -19,845,000 -26,434,000 -30,675,000 -20,991,000 -141,715,000 -17,222,000 -14,779,000 -6,405,000 -4,670,000 -6,088,000 -9,321,000 -6,853,000 -6,424,000 -11,026,000 -9,525,000 -8,528,000 -6,592,000 -5,520,000 -22,718,000 -9,735,000 -6,315,000 -11,561,000 -9,744,000      -10,189,000 -3,191,000 -8,393,000 -17,318,000 -9,647,000 -11,875,000 -19,999,000 -11,091,000  -8,670,000 -2,853,000 -4,639,000 -32,126,000   -77,860,000 -70,123,000 -8,846,000 -15,108,000 -4,616,000 -31,685,000     
          cash flows from financing activities:
                                                                               
          proceeds from (repayments of) borrowings under credit facilities
        32,783,000    16,190,000                                                                   
          repayment of debt
        -1,572,000    -7,522,000    -7,586,000    -3,907,000                                                           
          principal payments under finance lease obligations
        -153,000 -148,000 -150,000 -143,000 -163,000 -116,000 -185,000 -191,000 -191,000 -348,000 -180,000 -318,000 -799,000 -751,000 -651,000 -648,000 -686,000 -667,000 -640,000 -837,000 -675,000 -773,000 -814,000 -393,000 -233,000 -306,000 -295,000 -301,000 -298,000                                           
          cash dividends paid
        -2,905,000 -2,902,000 -2,903,000 -2,902,000 -2,803,000 -2,792,000 -2,802,000 -2,801,000 -2,692,000 -2,684,000 -2,683,000 -2,683,000 -2,571,000 -2,576,000 -2,472,000 -2,592,000 -2,520,000 -2,454,000 -2,452,000 -2,453,000 -2,338,000 -2,337,000 -2,338,000 -2,337,000 -2,245,000 -2,244,000 -2,244,000 -2,243,000 -2,125,000 -2,127,000 -2,125,000 -2,125,000 -2,012,000 -2,010,000 -2,004,000 -2,004,000 -1,895,000 -1,895,000 -1,897,000 -1,903,000 -1,801,000 -1,801,000 -1,808,000 -1,815,000 -1,708,000       -1,532,000 -1,550,000                   
          payments of withholding taxes for stock-based compensation awards
        -5,772,000 -102,000 -203,000 -113,000 -2,224,000 -1,035,000 -173,000 -389,000 -6,013,000 -133,000 -229,000 -1,258,000 -3,614,000 -537,000 -244,000 -95,000 -2,717,000 -285,000 -12,000 -183,000 -2,838,000 -9,000 -187,000 -10,000 -2,015,000 -14,000 -69,000 -785,000 -3,978,000 -150,000 -241,000 -632,000 -2,133,000                                       
          net cash from financing activities
        22,381,000 -1,404,000 27,960,000 -39,855,000 3,478,000 -57,112,000 6,726,000 5,903,000 40,297,000 -38,585,000 17,570,000 2,456,000 -6,291,000 -66,907,000 -7,069,000 -887,000 39,305,000 364,227,000 17,257,000 2,795,000 8,727,000 -93,396,000 -49,268,000 146,974,000 -11,401,000 -2,900,000 -4,828,000 -3,529,000 -6,797,000 -3,251,000 -2,644,000 -3,164,000 -4,546,000 -4,507,000 -24,993,000 -9,681,000 23,736,000 -14,424,000 -16,302,000 -12,758,000 21,372,000  -4,736,000    6,856,000 22,760,000   18,960,000 -29,006,000 32,314,000 37,022,000  8,877,000   56,980,000   51,516,000 54,319,000 -5,498,000 125,000 9,955,000      
          effects of exchange rate changes
        -217,000 29,000 -73,000 1,046,000 679,000 -1,242,000 1,248,000 -230,000 -383,000 631,000 -243,000 -667,000 130,000 921,000 -1,429,000 -1,264,000 -260,000 -182,000 -201,000 435,000 -446,000 898,000 658,000 437,000 -381,000 100,000 -322,000 -54,000 -46,000 6,000 -154,000 -600,000 608,000 95,000 380,000 225,000 688,000 -1,003,000 118,000 -42,000 448,000 -36,000 -500,000 203,000 -682,000  105,000 181,000  -439,000 -361,000  -93,000 -68,000  287,000 193,000  -317,000   -528,000 -577,000  -35,000 -209,000 -273,000 -225,000 -960,000 -64,000 -58,000 
          net change in cash and cash equivalents
        2,508,000 -2,730,000 3,820,000 -3,043,000 -1,079,000 -1,161,000 776,000 3,994,000 -190,000 -3,107,000 -173,000 1,331,000 2,142,000 -7,581,000 -11,493,000 11,938,000 5,775,000 -3,547,000 -6,336,000 5,411,000 -6,944,000 -91,876,000 -147,314,000 157,492,000 -17,431,000 30,481,000 19,670,000 32,992,000 -28,781,000 17,033,000 10,717,000 22,689,000 -21,638,000 19,358,000 3,989,000 2,156,000 -15,123,000 15,658,000 -5,179,000 2,117,000 -5,368,000 -590,000 4,197,000 -1,309,000 8,788,000 -6,460,000 -4,712,000 -3,461,000 2,617,000 -330,000 4,186,000 5,162,000 3,175,000 2,891,000 3,290,000 -6,643,000 -4,097,000 680,000 3,828,000 -14,656,000 11,403,000 -16,567,000 -19,460,000 14,763,000 -3,570,000 464,000 1,949,000     
          cash and cash equivalents at beginning of period
        13,681,000 16,713,000 13,294,000 13,101,000 14,462,000 25,878,000 125,007,000 70,645,000 41,844,000 31,464,000 24,236,000 13,150,000 22,774,000 22,774,000  16,056,000 16,056,000  12,255,000 12,255,000  16,104,000 16,104,000  12,253,000   31,730,000 31,730,000  15,644,000 15,644,000 10,642,000 10,642,000 49,643,000 49,643,000 5,062,000 
          cash and cash equivalents at end of period
        16,189,000 -2,730,000 3,820,000 -3,043,000 15,634,000 -1,161,000 776,000 3,994,000 13,104,000 -3,107,000 -173,000 1,331,000 15,243,000 -7,581,000 -11,493,000 11,938,000 20,237,000 -3,547,000 -6,336,000 5,411,000 18,934,000 -91,876,000 -147,314,000 157,492,000 107,576,000 30,481,000 19,670,000 32,992,000 41,864,000 17,033,000 10,717,000 22,689,000 20,206,000 19,358,000 3,989,000 2,156,000 16,341,000 15,658,000 -5,179,000 2,117,000 18,868,000 -590,000 4,197,000 -1,309,000 21,938,000 -6,460,000 18,062,000 19,313,000  15,726,000 20,242,000  15,430,000 15,146,000  9,461,000 12,007,000  16,081,000   15,163,000 12,270,000  12,074,000 16,108,000 12,591,000 5,946,000 11,206,000 9,677,000 10,325,000 
          amortization of pension and post-retirement costs
                                                                               
          loss on sale of property, plant, and equipment
                                         -1,357,000 60,000 119,000 28,000                                   
          deferred income tax expense
         -5,060,000 -18,000    -935,000   -6,856,000 17,000    -141,000     -15,000 382,000 -4,663,000 -4,953,000 993,000 -1,227,000 -3,141,000 1,147,000 4,207,000 371,000 4,023,000 -5,770,000 788,000 -359,000  415,000                                     
          impairment charges
                             -294,000                                                 
          loss on asset disposal
                                                                               
          net pension curtailments and settlements
                               32,000                                              
          changes in assets and liabilities, net of acquired assets and liabilities:
                                                                               
          decrease in accounts receivable
                             -14,606,000 8,568,000 -5,718,000 11,049,000 12,213,000 -24,368,000 2,920,000 -14,698,000 3,055,000 1,786,000 -3,478,000 -8,582,000 3,088,000 9,310,000 -17,238,000 -13,644,000          -8,680,000 -8,214,000 8,834,000 -5,116,000 -4,569,000 11,538,000 -5,502,000 -21,792,000  -8,627,000   -58,366,000   -15,152,000 -8,491,000 20,651,000 -27,752,000 -9,253,000 -13,443,000     
          decrease in inventory
                             8,595,000 10,702,000 -3,862,000 -16,723,000 1,942,000 20,783,000 10,867,000 -9,561,000    5,097,000 491,000 -3,455,000 3,095,000 -9,593,000          -16,559,000 -13,363,000 -745,000 -2,617,000 3,770,000 4,915,000 -21,953,000 -1,381,000  -26,805,000   -10,276,000   -9,710,000 -5,743,000 -829,000 -12,859,000 -17,970,000 -22,190,000     
          decrease in prepaid and other current assets
                             3,161,000 6,578,000 -8,391,000 1,127,000 1,834,000 172,000 -32,000 -556,000 -3,486,000 -280,000 5,562,000 -634,000 -5,529,000 3,190,000 -7,832,000 -1,435,000          -2,658,000 153,000 1,994,000 11,104,000 2,390,000 5,335,000 -1,235,000 -988,000  -5,561,000   -1,147,000   -1,455,000 -2,580,000 -1,972,000 -999,000 -1,047,000 -2,972,000     
          increase in accounts payable and accrued expenses
                             -12,118,000 -2,125,000 5,368,000 -13,002,000 -4,461,000 4,699,000 -2,783,000 -16,030,000 19,110,000 3,899,000 2,119,000 -16,308,000 16,442,000 2,472,000 16,354,000 -835,000 4,965,000 5,664,000 7,214,000 -15,085,000 1,310,000 -2,417,000 1,612,000 -18,494,000 3,849,000 -8,965,000 -16,474,000 13,477,000 -27,143,000 -26,153,000 14,277,000 -12,942,000 -19,527,000 2,245,000 -6,415,000 -12,004,000 -952,000 -1,798,000 15,708,000 243,000 -8,166,000 -12,688,000 -1,163,000 2,069,000 -14,001,000 4,761,000 2,141,000 -7,894,000 -11,413,000 4,287,000 
          increase in unearned revenue
                             3,233,000 -41,000 681,000 -938,000 -1,810,000 -640,000   -1,888,000 233,000   -410,000 3,061,000 559,000 1,126,000 -44,000 -1,803,000 -488,000 -255,000 -411,000 -490,000 -5,793,000 5,510,000 3,641,000 1,637,000 1,462,000 18,000 -1,077,000 32,000 -175,000 -1,470,000 -784,000 1,024,000 454,000 651,000 1,532,000 -29,000 300,000 -959,000 -2,065,000 -1,781,000 -83,000 1,369,000 1,061,000 920,000 1,126,000 -7,789,000 -5,252,000  
          increase in interest and taxes payable
                             -300,000 -915,000 690,000 368,000 694,000 -369,000 -3,655,000 2,525,000 -5,122,000 3,473,000 458,000 1,626,000 1,569,000 -968,000 122,000 -1,237,000 1,613,000 -412,000 301,000 1,009,000 -1,806,000 -2,344,000 1,926,000 1,314,000 -4,856,000 5,432,000 2,648,000 2,283,000 177,000 473,000 -1,747,000 200,000 2,276,000 -1,706,000 -4,346,000 2,054,000 1,297,000 -359,000 6,093,000 -14,497,000 -1,144,000 1,339,000 -12,777,000 7,960,000 10,272,000 773,000 1,065,000 -1,969,000 -1,600,000 -1,033,000 
          increase in unearned income due to customer prepayments
                             13,718,000 13,672,000                                                 
          other — net
                                                             -512,000 7,637,000 -5,814,000 -20,000 -320,000 -59,000  -1,842,000 -566,000 -2,781,000 -1,242,000 -202,000 -2,184,000 6,579,000 2,612,000 984,000 826,000 1,771,000 
          payments for acquisition, net of cash acquired
                                                                             
          deferred financing costs
         -79,000                       -112,000        -300,000                                  
          repurchase of common stock
                           -6,766,000 -199,000     -681,000 -405,000 -1,135,000 -2,201,000 -462,000 -4,381,000 -1,980,000 -768,000 -6,667,000 -2,672,000 -1,466,000          -2,913,000           
          proceeds from borrowings under credit facilities
          32,793,000    17,408,000    24,498,000                                                             
          repayment of long-term debt
          -1,498,000    -7,522,000    -3,836,000    -4,584,000 -3,338,000 -3,839,000 -251,000 -149,000 -1,277,000 -377,000 -4,277,000 -15,929,000 -286,000 -142,000 -224,000 -202,000 -200,000 -197,000 -264,000 -130,000 -193,000 -190,000 -189,000 -30,246,000 -20,182,000 -5,180,000 -177,000 -10,118,000 -172,000 -227,000 -41,725,000 -13,165,000 -19,181,000 -13,929,000 -20,206,000 -15,492,000 -8,246,000 -23,247,000 -55,541,000 -247,000 -20,246,000 -7,494,000 -247,000 -51,250,000 -25,083,000 -10,000,000 -20,000,000  -20,600,000 -15,000,000   1,000 -25,793,000 -5,037,000 -5,033,000 -33,000 -18,607,000 -18,607,000 -8,629,000 
          decrease (increase) in accounts receivable
                                              -6,768,000 1,676,000 -14,689,000 16,360,000 3,039,000 845,000 -5,467,000 13,118,000         43,155,000  -13,094,000 -5,765,000  930,000            
          decrease (increase) in inventory
                                              2,141,000 1,680,000 -527,000 9,444,000 7,778,000 8,075,000 -5,925,000 -6,264,000         8,275,000  -21,198,000 -2,141,000  6,752,000            
          decrease (increase) in prepaid and other current assets
                                              -174,000 -775,000 -7,000 4,104,000 2,072,000 -1,557,000 -2,480,000 388,000         3,062,000  -1,280,000 225,000  -6,654,000            
          unearned income due to customer prepayments
                  1,615,000 7,337,000 7,724,000  4,442,000    979,000 2,153,000 5,890,000                                                   
          proceeds from borrowings under revolving credit agreement
                56,779,000    4,600,000  -3,702,000 3,727,000 49,067,000 75,287,000 20,510,000 7,545,000 14,955,000                                                   
          proceeds from issuance of debt
                     2,633,000                                                          
          gain on sale of property, plant, and equipment
                                                                               
          proceeds from settlement of currency exchange contract
                                                                              
          proceeds from (repayments of) borrowings under revolving credit agreement
                                                                               
          payments for acquisition
                                         -98,000 -16,406,000                                   
          proceeds from issuance of long-term debt
                                         10,000,000 18,000,000 27,000,000 10,000,000 24,010,000 2,990,000 9,897,000 41,103,000 80,000 33,170,000 30,086,000 90,000 70,240,000 20,097,000 98,000 25,207,000 20,105,000 26,072,000 42,472,000 20,000,000 70,000,000 18,000,000 300,000 40,900,000 40,000,000 335,000 15,747,000 15,000,000 26,000,000 26,000,000   24,000 
          (gain) loss on sale of property, plant, and equipment
                                              94,000 25,000 -720,000                               
          domestic pension plan contributions
                                 -1,500,000 -1,500,000 -1,500,000 -4,000,000 -25,000,000 -4,000,000 -9,000,000                                       
          proceeds from term loan
                                                                               
          deferred income tax benefit
                                            -696,000                                   
          accounts payable
                                                                               
          accrued expenses
                                                                               
          changes in assets and liabilities net of acquired assets and liabilities:
                                                                               
          proceeds from short-term debt under revolving credit agreement
                                                                               
          short-term debt under revolving credit agreement
                              -30,000,000                                                 
          held for sale impairment charges
                                                                               
          held-for-sale impairment charges
                                10,766,000                                               
          pension curtailment charge
                                                                               
          pension settlement charges
                                                                               
          repayment of short-term debt
                                                      -4,886,000                         
          principal payments under capital lease obligations
                                     -288,000 -148,000 -214,000 -211,000 -199,000 -261,000 -193,000 -190,000 -187,000 -124,000 -184,000 -241,000 -177,000 -178,000 -174,000 -230,000 -169,000 -328,000 -163,000 -166,000 -329,000 -164,000 -169,000 -383,000 -191,000 -265,000 -441,000 -257,000 -213,000              
          non-cash compensation expense
                                      3,553,000                                         
          decrease in inventories
                                      9,326,000                                         
          proceeds from issuance of short-term debt
                                           -3,799,000 6,186,000  -2,028,000 -8,298,000 14,103,000             17,160,000        10,414,000          
          deferred tax expense
                                                                               
          increase in long-term liabilities
                                         1,347,000 -1,720,000 1,400,000 -5,291,000 8,636,000 -3,099,000 -3,301,000 -2,920,000 -3,748,000 -3,374,000 -281,000 -1,520,000 7,628,000 -11,419,000 -7,671,000 5,727,000 2,409,000 -525,000 -1,435,000 -6,459,000 -1,079,000 -5,077,000 -1,655,000 -1,623,000 255,000 -1,320,000 970,000            
          common shares withheld for taxes
                                          -95,000 -822,000 -1,480,000                                   
          issuance of common stock under stock option plans
                                                     -1,000 360,000 65,000 88,000 849,000 576,000 14,000 139,000 128,000 15,000 698,000 637,000 1,755,000 851,000 53,000 174,000 12,000 47,000 4,864,000 3,288,000 6,960,000 558,000 364,000 249,000 2,381,000 
          tax benefit from stock compensation realization
                                                     368,000 109,000 13,000 -953,000 1,316,000 920,000 740,000 73,000 67,000 269,000 376,000 376,000               
          adjustments to reconcile net income to net cash provided from operating activities:
                                                                               
          deferred tax (benefit) expense
                                                                               
          net cash provided from operating activities
                                                     39,254,000            16,219,000  20,421,000            
          other investments — net
                                                             1,742,000 -4,287,000 13,000  46,000 14,000  66,000 66,000 5,000 42,000 2,000 33,000  -11,000 -16,000  
          net cash (used in) investing activities
                                                 -11,018,000 -14,368,000 -15,702,000 -10,944,000                           
          proceeds from issuance (repayment) of short-term debt
                                                 -14,805,000 11,806,000 2,333,000 13,000            8,561,000 8,051,000 -14,035,000 28,115,000   14,304,000 -5,074,000 2,591,000 -5,009,000      
          net cash (used in) financing activities
                                                                               
          amortization of mine development costs
                                                                               
          decrease (increase) in deferred income taxes
                                                  1,664,000 1,837,000 340,000                           
          other investments-net
                                                      -2,000   20,000 8,000  1,742,000                   
          net cash (used in) operating activities
                                                    -4,067,000                           
          net cash provided from financing activities
                                                    24,481,000            19,317,000               
          reimbursement for capital spending under government contract
                                                                               
          payments for purchase of business less cash received
                                                                            -3,982,000   
          net cash (used in) provided from financing activities
                                                        -26,300,000 -693,000                      
          debt issuance costs
                                                         -1,301,000      -623,000                
          payment of dividends
                                                      -3,405,000 -1,648,000  -3,198,000 -1,544,000                     
          effect of exchange rate changes
                                                                               
          depreciation, depletion and amortization
                                                      22,093,000 12,131,000 10,807,000 18,656,000 8,572,000 8,123,000 20,440,000 11,951,000 11,280,000 22,425,000 8,894,000 9,616,000 17,100,000 10,304,000 8,323,000 17,271,000 7,032,000 5,936,000 11,928,000 6,158,000 11,818,000 5,627,000 10,680,000 5,343,000 12,025,000 
          decrease in deferred income taxes
                                                      58,000 17,000  1,166,000 1,951,000  -1,360,000 -1,295,000  -200,000   6,117,000   14,000 40,000  -3,672,000  4,383,000     
          net cash (used in) provided from operating activities
                                                      -1,484,000            -20,709,000             
          payments for purchase of property, plant and equipment
                                                      -12,859,000 -6,120,000 -8,018,000 -13,023,000 -5,781,000 -8,753,000 -17,957,000 -9,282,000 -9,465,000 -11,103,000 -3,869,000 -8,501,000 -24,768,000 -17,479,000 -12,904,000 -14,637,000 -7,048,000 -8,785,000 -11,156,000 -4,845,000 -5,978,000 -2,081,000 -4,860,000 -2,179,000 -2,959,000 
          proceeds from sale of property, plant and equipment
                                                      3,009,000 3,009,000 -1,000 67,000     21,000 33,000 31,000 -6,000 76,000     277,000 51,000 51,000   45,000 25,000 15,000 
          proceeds from issuance (repayments) of short-term debt
                                                       4,119,000  -12,729,000 -678,000  16,322,000                   
          decrease in other receivables
                                                        139,000 -40,000 314,000 -196,000 3,873,000 2,473,000  1,293,000   6,229,000   11,263,000 11,263,000         
          issuance (repayment) of short-term debt
                                                                               
          effects of exchange rate changes on cash and cash equivalents
                                                                               
          cash and cash equivalents at beginning of year
                                                                               
          cash and cash equivalents at end of year
                                                                               
          reimbursements for capital equipment under government contracts
                                                            991,000 563,000  2,570,000 1,112,000  14,915,000             
          payments for purchase of business net of cash received
                                                            -3,953,000 -3,955,000     -20,605,000   -87,462,000 -87,445,000    -25,694,000 -25,694,000    
          derivative financial instruments ineffectiveness
                                                                               
          proceeds from transfer of acquired inventory to consignment line
                                                                 5,667,000             
          decrease (increase) in other receivables
                                                              -2,130,000  942,000 -3,138,000  -8,750,000            
          net cash provided from (used in) financing activities
                                                                               
          adjustments to reconcile net income to net cash (used in) provided from operating activities:
                                                                               
          derivative financial instrument ineffectiveness
                                                                  489,000   163,000 222,000  -72,000 34,000 -426,000 -248,000 -94,000 -510,000 -1,000 
          repayments of short-term debt
                                                               -8,522,000                
          adjustments to reconcile net income to net cash
                                                                               
          used in operating activities:
                                                                               
          amortization of mine costs
                                                                2,999,000      1,925,000         
          changes in assets and liabilities net of acquired assets
                                                                               
          and liabilities:
                                                                               
          tax benefit from exercise of stock options
                                                                  164,000   28,000 3,000  2,716,000 1,713,000      
          proceeds from transfer of inventory to consignment line
                                                                               
          proceeds from sale of business
                                                                       2,150,000 2,150,000      
          tax benefit from the exercise of stock options
                                                                               
          other - net
                                                                               
          proceeds from sale of acquired inventory to consignment line
                                                                               
          other investments - net
                                                                               
          proceeds from sale of acquired inventory to consignment
                                                                      24,325,000         
          proceeds from early termination of 2007 derivative contracts
                                                                               
          decrease (increase) in prepaid and other assets
                                                                               
          proceeds from sale of inventory to consignment line
                                                                               
          increase in other long-term liabilities
                                                                     5,461,000 3,221,000  478,000 -1,896,000 2,162,000 1,156,000 1,348,000 949,000 -374,000 
          proceeds from sales of inventory to consignment
                                                                     24,325,000          
          deferred financing cost write-off
                                                                               
          purchase of equipment previously held under operating lease
                                                                            -448,000 -448,000  
          proceeds from issuance / (repayment) of short-term debt
                                                                               
          net cash from (used in) financing activities
                                                                          28,791,000     
          net cash from (used in) operating activities
                                                                          5,116,000     
          proceeds from issuance/(repayment) of short-term debt
                                                                          864,000 3,599,000 -673,000 -717,000 13,557,000 
          stock option expense
                                                                           98,000    
          issuance of common stock
                                                                               
          increase in deferred income taxes
                                                                              -709,000 
          proceeds from other investments
                                                                              14,000