7Baggers

Preformed Line Products Company
(NASDAQ:PLPC) 

PLPC stock logo

Preformed Line Products Company, together with its subsidiaries, designs and manufactures products and systems used in the construction and maintenance of overhead, ground-mounted, and underground networks for the energy, telecommunication, cable operator, information, and other industries. The comp...

Founded: 1947
Full Time Employees: 2,983
Sector: Industrials
Industry: Electrical Equipment & Parts

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    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2003-09-30 2003-06-30 
                                                                                             
      net sales
    176,278,000 173,109,000 178,087,000 169,601,000 148,541,000 167,117,000 146,973,000 138,720,000 140,904,000 145,603,000 160,438,000 181,813,000 181,824,000 169,924,000 165,402,000 163,471,000 138,223,000 131,446,000 135,380,000 133,038,000 117,553,000 118,505,000 127,463,000 117,629,000 102,852,000 113,649,000 119,217,000 114,842,000 97,153,000 105,411,000 108,413,000 108,915,000 98,139,000 96,892,000 99,239,000 97,512,000 84,569,000 86,432,000 88,299,000 83,220,000 78,682,000 91,961,000 89,046,000 87,869,000 85,790,000 96,179,000 102,100,000 99,981,000 89,925,000 308,948,000 100,828,000 111,716,000 98,689,000 324,986,000 114,206,000 111,940,000 108,846,000   114,530,000 95,088,000  93,942,000 82,137,000 68,908,000  69,132,000 59,568,000 58,694,000  73,952,000 75,362,000 64,703,000  66,099,000 63,753,000 56,531,000  56,439,000 56,098,000 52,635,000  55,614,000 52,692,000 50,772,000  49,065,000 39,473,000 39,972,000 
      yoy
    18.67% 3.59% 21.17% 22.26% 5.42% 14.78% -8.39% -23.70% -22.51% -14.31% -3.00% 11.22% 31.54% 29.27% 22.18% 22.88% 17.58% 10.92% 6.21% 13.10% 14.29% 4.27% 6.92% 2.43% 5.87% 7.82% 9.97% 5.44% -1.00% 8.79% 9.24% 11.69% 16.05% 12.10% 12.39% 17.17% 7.48% -6.01% -0.84% -5.29% -8.29% -4.39% -12.79% -12.11% -4.60% -68.87% 1.26% -10.50% -8.88% -4.93% -11.71% -0.20% -9.33%   -2.26% 14.47%   39.44% 37.99%  35.89% 37.89% 17.40%  -6.52% -20.96% -9.29%  11.88% 18.21% 14.46%  17.12% 13.65% 7.40%  1.48% 6.46% 3.67%  13.35% 33.49% 27.02%     
      qoq
    1.83% -2.80% 5.00% 14.18% -11.12% 13.71% 5.95% -1.55% -3.23% -9.25% -11.76% -0.01% 7.00% 2.73% 1.18% 18.27% 5.16% -2.91% 1.76% 13.17% -0.80% -7.03% 8.36% 14.37% -9.50% -4.67% 3.81% 18.21% -7.83% -2.77% -0.46% 10.98% 1.29% -2.36% 1.77% 15.30% -2.16% -2.11% 6.10% 5.77% -14.44% 3.27% 1.34% 2.42% -10.80% -5.80% 2.12% 11.18% -70.89% 206.41% -9.75% 13.20% -69.63% 184.56% 2.02% 2.84%    20.45%   14.37% 19.20%   16.06% 1.49%   -1.87% 16.47%   3.68% 12.78%   0.61% 6.58%   5.55% 3.78%   24.30% -1.25%  
      cost of products sold
    121,058,000 121,489,000 125,238,000 114,202,000 99,870,000 111,488,000 101,195,000 94,447,000 96,773,000 97,503,000 106,301,000 115,486,000 115,541,000 107,694,000 107,109,000 110,765,000 96,272,000 91,598,000 92,217,000 89,999,000 77,361,000 81,882,000 82,549,000 78,063,000 69,942,000 77,468,000 79,874,000 77,035,000 69,888,000 73,392,000 74,922,000 73,712,000 66,621,000 66,138,000 65,704,000 67,839,000 59,904,000 56,968,000 59,444,000 56,414,000 54,393,000 65,872,000 62,887,000 61,425,000 61,030,000 66,331,000 69,645,000 68,784,000 62,477,000 209,707,000 69,168,000 74,167,000 67,390,000 219,055,000 75,699,000 74,974,000 72,834,000   77,824,000 62,697,000  62,271,000 54,682,000 48,883,000  44,518,000 39,718,000 40,116,000  48,489,000 51,685,000 44,433,000  43,316,000 42,691,000 37,623,000  37,677,000 37,652,000 36,164,000  36,355,000 35,275,000 34,145,000  32,652,000 27,816,000 28,743,000 
      gross profit
    55,220,000 51,620,000 52,849,000 55,399,000 48,671,000 55,629,000 45,778,000 44,273,000 44,131,000 48,100,000 54,137,000 66,327,000 66,283,000 62,230,000 58,293,000 52,706,000 41,951,000 39,848,000 43,163,000 43,039,000 40,192,000 36,623,000 44,914,000 39,566,000 32,910,000 36,181,000 39,343,000 37,807,000 27,265,000 32,019,000 33,491,000 35,203,000 31,518,000 30,754,000 33,535,000 29,673,000 24,665,000 29,464,000 28,855,000 26,806,000 24,289,000 26,089,000 26,159,000 26,444,000 24,760,000 29,848,000 32,455,000 31,197,000 27,448,000 99,241,000 31,660,000 37,549,000 31,299,000 105,931,000 38,507,000 36,966,000 36,012,000   36,706,000 32,391,000  31,671,000 27,455,000 20,025,000  24,614,000 19,850,000 18,578,000  25,463,000 23,677,000 20,270,000  22,783,000 21,062,000 18,908,000  18,762,000 18,446,000 16,471,000  19,259,000 17,417,000 16,627,000  16,413,000   
      yoy
    13.46% -7.21% 15.45% 25.13% 10.29% 15.65% -15.44% -33.25% -33.42% -22.71% -7.13% 25.84% 58.00% 56.17% 35.05% 22.46% 4.38% 8.81% -3.90% 8.78% 22.13% 1.22% 14.16% 4.65% 20.70% 13.00% 17.47% 7.40% -13.49% 4.11% -0.13% 18.64% 27.78% 4.38% 16.22% 10.70% 1.55% 12.94% 10.31% 1.37% -1.90% -12.59% -19.40% -15.24% -9.79% -69.92% 2.51% -16.92% -12.30% -6.32% -17.78% 1.58% -13.09%   0.71% 11.18%   33.70% 61.75%  28.67% 38.31% 7.79%  -3.33% -16.16% -8.35%  11.76% 12.42% 7.20%  21.43% 14.18% 14.80%  -2.58% 5.91% -0.94%  17.34%       
      qoq
    6.97% -2.33% -4.60% 13.82% -12.51% 21.52% 3.40% 0.32% -8.25% -11.15% -18.38% 0.07% 6.51% 6.75% 10.60% 25.64% 5.28% -7.68% 0.29% 7.08% 9.75% -18.46% 13.52% 20.22% -9.04% -8.04% 4.06% 38.66% -14.85% -4.40% -4.86% 11.69% 2.48% -8.29% 13.02% 20.30% -16.29% 2.11% 7.64% 10.36% -6.90% -0.27% -1.08% 6.80% -17.05% -8.03% 4.03% 13.66% -72.34% 213.46% -15.68% 19.97% -70.45% 175.10% 4.17% 2.65%    13.32%   15.36% 37.10%   24.00% 6.85%   7.54% 16.81%   8.17% 11.39%   1.71% 11.99%   10.58% 4.75%      
      gross margin %
    31.33% 29.82% 29.68% 32.66% 32.77% 33.29% 31.15% 31.92% 31.32% 33.04% 33.74% 36.48% 36.45% 36.62% 35.24% 32.24% 30.35% 30.32% 31.88% 32.35% 34.19% 30.90% 35.24% 33.64% 32.00% 31.84% 33.00% 32.92% 28.06% 30.38% 30.89% 32.32% 32.12% 31.74% 33.79% 30.43% 29.17% 34.09% 32.68% 32.21% 30.87% 28.37% 29.38% 30.09% 28.86% 31.03% 31.79% 31.20% 30.52% 32.12% 31.40% 33.61% 31.71% 32.60% 33.72% 33.02% 33.09%  NaN% 32.05% 34.06% NaN% 33.71% 33.43% 29.06% NaN% 35.60% 33.32% 31.65% NaN% 34.43% 31.42% 31.33% NaN% 34.47% 33.04% 33.45% NaN% 33.24% 32.88% 31.29% NaN% 34.63% 33.05% 32.75% NaN% 33.45% 0% 0% 
      costs and expenses
                                                                                             
      selling
    13,769,000 13,486,000 13,252,000 13,092,000 12,181,000 12,576,000 12,318,000 11,928,000 11,900,000 12,945,000 12,732,000 13,013,000 12,388,000 12,139,000 11,245,000 11,668,000 10,661,000 10,697,000 10,142,000 10,099,000 9,601,000 9,409,000 8,884,000 8,439,000 8,905,000 9,741,000 9,410,000 9,046,000 8,413,000 9,061,000 8,965,000 9,471,000 8,861,000 8,181,000 8,957,000 8,626,000 8,284,000 7,963,000 8,022,000 8,183,000 7,631,000 7,741,000 7,893,000 7,752,000 7,207,000 8,645,000 9,444,000 9,061,000 8,505,000 26,830,000 8,874,000 9,291,000 9,061,000 27,749,000 9,344,000 9,506,000 8,896,000   9,272,000 8,036,000  7,678,000 7,038,000 6,502,000  5,750,000 5,526,000 5,364,000  6,119,000 6,186,000 6,267,000  6,208,000 6,618,000 5,963,000  5,475,000 5,630,000 5,767,000  5,608,000 5,519,000 5,055,000   4,356,000 4,415,000 
      general and administrative
    21,053,000 19,736,000 19,149,000 18,665,000 17,626,000 19,205,000 16,414,000 15,250,000 16,608,000 20,019,000 17,794,000 18,220,000 18,609,000 19,593,000 17,467,000 16,948,000 16,309,000 12,352,000 14,741,000 13,770,000 14,394,000 16,432,000 14,037,000 12,432,000 13,434,000 13,320,000 13,275,000 12,893,000 12,318,000 11,539,000 11,655,000 11,288,000 10,916,000 11,017,000 11,042,000 10,772,000 10,329,000 10,429,000 10,579,000 10,962,000 10,086,000 9,282,000 8,010,000 9,391,000 10,186,000 10,416,000 10,153,000 10,836,000 11,158,000 34,171,000 10,386,000 12,127,000 11,480,000 33,434,000 12,788,000 12,149,000 12,007,000   11,780,000 10,962,000  9,856,000 9,666,000 9,478,000  8,609,000 7,371,000 7,052,000  7,506,000 7,691,000 7,760,000  6,736,000 6,549,000 5,816,000  5,695,000 5,880,000 5,818,000  5,985,000 5,552,000 4,927,000  5,243,000 4,342,000 5,193,000 
      research and engineering
    6,736,000 6,331,000 6,182,000 5,695,000 5,479,000 5,589,000 5,545,000 5,358,000 5,431,000 5,688,000 5,840,000 5,760,000 5,193,000 4,783,000 4,741,000 5,363,000 4,774,000 4,953,000 4,861,000 4,763,000 4,611,000 4,675,000 4,541,000 4,113,000 4,296,000 4,378,000 4,240,000 4,428,000 4,140,000 4,094,000 3,706,000 3,646,000 3,661,000 3,506,000 3,520,000 3,612,000 3,690,000 3,247,000 3,433,000 3,609,000 3,738,000 3,559,000 3,745,000 3,864,000 3,721,000 3,945,000 4,399,000 4,183,000 3,775,000 10,994,000 3,714,000 3,571,000 3,770,000 11,554,000 3,893,000 3,747,000 3,655,000   3,215,000 3,362,000  2,915,000 2,700,000 2,859,000  2,411,000 2,159,000 2,061,000  2,218,000 2,338,000 2,234,000  2,026,000 2,058,000 1,946,000  1,928,000 2,006,000 1,873,000  1,565,000 1,527,000 1,543,000  1,389,000 1,282,000 1,288,000 
      other operating expense
    -54,000 318,000 1,134,000 823,000 255,000 746,000 1,109,000 445,000 -1,367,000 2,502,000 -2,307,000 1,186,000 1,112,000 1,128,000 937,000 778,000                                -495,000 -203,000 104,750 419,000 2,071,000 121,000 -169,250 -677,000 1,890,000 -651,000   -694,000 -94,000  -1,735,000 1,135,000   -337,000 -311,000 289,000                     
      costs and expenses - sum
    41,504,000 39,871,000 39,717,000 38,275,000 35,541,000 38,116,000 35,386,000 32,981,000 32,572,000 41,154,000 34,059,000 38,179,000 37,302,000 37,643,000 40,919,000 34,757,000 32,500,000 28,883,000 30,085,000 30,301,000 29,424,000 32,756,000 28,024,000 24,759,000 27,757,000 28,358,000 27,700,000       23,008,000 23,725,000 23,379,000 22,407,000     17,544,500 24,073,000 21,259,000 24,845,000 25,570,000 27,320,000   76,360,000 23,393,000 27,060,000 24,432,000 6,337,000 25,348,000 27,292,000 23,907,000   23,573,000 22,266,000  18,714,000 20,539,000 18,694,000  16,433,000 14,745,000 14,766,000  16,305,000 16,448,000 16,162,000  14,801,000 15,329,000 13,911,000  13,234,000 13,637,000 13,519,000  13,270,000 12,413,000 11,640,000   10,071,000 10,449,000 
      operating income
    13,716,000 11,749,000 13,132,000 17,124,000 13,130,000 17,513,000 10,392,000 11,292,000 11,559,000 6,946,000 20,078,000 28,148,000 28,981,000 24,587,000 17,374,000 17,949,000 9,451,000 10,965,000 13,078,000 12,738,000 10,768,000 3,867,000 16,890,000 14,807,000 5,153,000 7,823,000 11,643,000 11,115,000 2,046,000 7,841,000 8,015,000 9,333,000 7,745,000 7,746,000 9,810,000 6,294,000 2,258,000 7,088,000 6,625,000 4,079,000 3,687,000 5,164,000 2,086,000 5,185,000 -85,000 4,278,000 5,135,000 7,612,000 4,213,000 22,881,000 8,267,000 10,489,000 6,867,000 30,963,000 13,159,000 9,674,000 12,105,000   13,133,000 10,125,000  12,957,000 6,916,000 1,331,000  8,181,000 5,105,000 3,812,000  9,158,000 7,229,000 4,427,000  8,327,000 6,494,000 5,378,000  5,815,000 5,180,000 3,298,000  6,565,000 5,349,000 5,179,000  6,044,000   
      yoy
    4.46% -32.91% 26.37% 51.65% 13.59% 152.13% -48.24% -59.88% -60.12% -71.75% 15.56% 56.82% 206.64% 124.23% 32.85% 40.91% -12.23% 183.55% -22.57% -13.97% 108.97% -50.57% 45.07% 33.22% 151.86% -0.23% 45.27% 19.09% -73.58% 1.23% -18.30% 48.28% 243.00% 9.28% 48.08% 54.30% -38.76% 37.26% 217.59% -21.33% -4437.65% 20.71% -59.38% -31.88% -102.02% -81.30% -37.89% -27.43% -38.65% -26.10% -37.18% 8.42% -43.27%   -26.34% 19.56%   89.89% 660.71%  58.38% 35.48% -65.08%  -10.67% -29.38% -13.89%  9.98% 11.32% -17.68%  43.20% 25.37% 63.07%  -11.42% -3.16% -36.32%  8.62%       
      qoq
    16.74% -10.53% -23.31% 30.42% -25.03% 68.52% -7.97% -2.31% 66.41% -65.40% -28.67% -2.87% 17.87% 41.52% -3.20% 89.92% -13.81% -16.16% 2.67% 18.29% 178.46% -77.10% 14.07% 187.35% -34.13% -32.81% 4.75% 443.26% -73.91% -2.17% -14.12% 20.50% -0.01% -21.04% 55.86% 178.74% -68.14% 6.99% 62.42% 10.63% -28.60% 147.56% -59.77% -6200.00% -101.99% -16.69% -32.54% 80.68% -81.59% 176.78% -21.18% 52.75% -77.82% 135.30% 36.02% -20.08%    29.71%   87.35% 419.61%   60.25% 33.92%   26.68% 63.29%   28.23% 20.75%   12.26% 57.06%   22.73% 3.28%      
      operating margin %
    7.78% 6.79% 7.37% 10.10% 8.84% 10.48% 7.07% 8.14% 8.20% 4.77% 12.51% 15.48% 15.94% 14.47% 10.50% 10.98% 6.84% 8.34% 9.66% 9.57% 9.16% 3.26% 13.25% 12.59% 5.01% 6.88% 9.77% 9.68% 2.11% 7.44% 7.39% 8.57% 7.89% 7.99% 9.89% 6.45% 2.67% 8.20% 7.50% 4.90% 4.69% 5.62% 2.34% 5.90% -0.10% 4.45% 5.03% 7.61% 4.69% 7.41% 8.20% 9.39% 6.96% 9.53% 11.52% 8.64% 11.12%  NaN% 11.47% 10.65% NaN% 13.79% 8.42% 1.93% NaN% 11.83% 8.57% 6.49% NaN% 12.38% 9.59% 6.84% NaN% 12.60% 10.19% 9.51% NaN% 10.30% 9.23% 6.27% NaN% 11.80% 10.15% 10.20% NaN% 12.32% 0% 0% 
      other income
    69,000 95,000 510,000 116,000 407,000 -528,000 64,000 91,000 35,000 119,000 18,000 108,000 40,000 429,000 898,000 495,000                                98,000 -24,000 284,000 194,000 162,000 37,000 419,000 235,000 209,000 145,000   43,000 184,000  1,005,000 409,000 351,000  326,000 178,000 479,000  176,000 22,000                  
      interest income
    777,000 740,000 683,000 384,000 510,000 717,000 538,000 346,000 972,000 610,000 478,000 419,000 304,000 272,000 143,000 104,000 113,000 92,000 30,000 26,000 21,000 33,000 36,000 79,000 111,000 170,000 211,000 223,000 179,000 146,000 111,000 134,000 95,000 105,000 62,000 160,000 104,000 85,000 63,000 68,000 75,000 74,000 103,000 112,000 102,000 138,000 138,000 98,000 109,000 414,000 204,000 134,000 116,000 488,000 160,000 179,000 137,000   140,000 151,000  84,000 94,000 83,000  95,000 87,000 125,000  225,000 216,000 223,000  279,000 269,000 305,000  389,000 353,000 402,000  263,000 241,000 213,000  222,000 96,000 107,000 
      interest expense
    -232,000 -297,000 -312,000 -318,000 -376,000 -381,000 -564,000 -568,000 -708,000 -707,000 -998,000 -1,134,000 -1,066,000 -1,085,000 -819,000 -784,000 -526,000 -544,000 -559,000 -457,000 -463,000 -464,000 -504,000 -719,000 -709,000 -529,000 -735,000 -585,000 -368,000 -298,000 -364,000 -348,000 -280,000 -230,000 -255,000 -277,000 -299,000 -256,000 -264,000 -166,000 -158,000 -142,000 -141,000 -149,000 -133,000 -154,000 -141,000 -202,000 -161,000 -329,000 -121,000 -105,000 -103,000 -453,000 -144,000 -149,000 -196,000   -266,000 -211,000  -162,000 -126,000 -170,000  -153,000 -107,000 -109,000  -138,000 -138,000 -139,000  -140,000 -132,000 -165,000  -164,000 -133,000 -102,000  -93,000 -86,000 -94,000  -74,000 -94,000 -130,000 
      other income - sum
    614,000 538,000 -10,776,000 182,000 541,000 -192,000 38,000 -131,000 299,000 22,000 -502,000 -607,000 -722,000 -384,000 222,000 -185,000 4,690,000 1,000,000 722,000 -161,000 -214,000 295,000 530,000 -922,000 -49,000 -400,000 -386,000       -55,000 -71,000 -36,000 -140,000     -159,250 55,000 -719,000 26,000 95,000 159,000   369,000 277,000 191,000 50,000 62,750 251,000 239,000 86,000   -83,000 124,000  927,000 377,000 264,000  268,000 158,000 495,000  263,000 100,000 82,000  130,000 130,000 134,000  206,000 205,000 281,000  143,000 128,000 92,000  2,447,000 -97,000 -47,000 
      income before income taxes
    14,330,000 12,287,000 2,356,000 17,306,000 13,671,000 17,321,000 10,430,000 11,161,000 11,858,000 6,968,000 19,576,000 27,541,000 28,259,000 24,203,000 17,596,000 17,764,000 14,141,000 11,965,000 13,800,000 12,577,000 10,554,000 4,162,000 17,420,000 13,885,000 5,104,000 7,423,000 11,257,000 10,850,000 1,928,000 7,880,000 7,856,000 9,224,000 7,629,000 7,691,000 9,739,000 6,258,000 2,118,000 6,990,000 6,534,000 3,773,000 3,656,000 5,158,000 2,141,000 4,466,000 -59,000 4,373,000 5,294,000 7,606,000 4,137,000 23,250,000 8,544,000 10,680,000 6,917,000 31,417,000 13,410,000 9,913,000 12,191,000   13,050,000 10,249,000  13,884,000 7,293,000 1,595,000           6,624,000 5,512,000  6,021,000 5,385,000 3,579,000      8,491,000   
      income tax expense
    3,781,000 3,852,000 -263,000 4,606,000 2,118,000 6,876,000 2,734,000 1,794,000 2,255,000 659,000 4,431,000 7,077,000 6,840,000 7,715,000 5,707,000 4,043,000 1,840,000 3,014,000 3,097,000 3,686,000 3,377,000 2,326,500 4,458,000 3,397,000 1,451,000 1,575,500 3,213,000 2,984,000 104,000 847,500 -1,198,000                                                           
      net income
    10,549,000 8,435,000 2,619,000 12,700,000 11,553,000 10,445,000 7,696,000 9,367,000 9,603,000 6,309,000 15,145,000 20,464,000 21,419,000 16,488,000 11,889,000 13,721,000 12,301,000 8,951,000 10,703,000 8,891,000 7,177,000 2,658,000 12,962,000 10,488,000 3,653,000 5,603,000 8,044,000 7,866,000 1,824,000 5,263,000 9,054,000 6,735,000 5,528,000 702,000 6,278,000 4,156,000 1,518,000 5,101,000 4,742,000 2,755,000 2,658,000 3,045,000 206,000 3,680,000 -256,000 2,488,000 2,555,000 5,080,000 2,738,000 14,483,000 6,104,000 6,386,000 4,965,000 20,002,000 9,284,000 6,596,000 8,133,000   8,530,000 6,854,000  9,882,000 6,096,000 1,034,000  6,259,000 3,542,000 2,717,000  6,423,000 5,489,000 2,950,000  5,664,000 3,816,000 3,718,000  3,999,000 3,545,000 2,484,000  4,179,000 3,696,000 3,228,000  5,496,000   
      yoy
    -8.69% -19.24% -65.97% 35.58% 20.31% 65.56% -49.18% -54.23% -55.17% -61.74% 27.39% 49.14% 74.12% 84.20% 11.08% 54.32% 71.39% 236.76% -17.43% -15.23% 96.47% -52.56% 61.14% 33.33% 100.27% 6.46% -11.16% 16.79% -67.00% 649.72% 44.22% 62.05% 264.16% -86.24% 32.39% 50.85% -42.89% 67.52% 2201.94% -25.14% -1138.28% 22.39% -91.94% -27.56% -109.35% -82.82% -58.14% -20.45% -44.85% -27.59% -34.25% -3.18% -38.95%   -22.67% 18.66%   39.93% 562.86%  57.88% 72.11% -61.94%  -2.55% -35.47% -7.90%  13.40% 43.84% -20.66%  41.64% 7.64% 49.68%  -4.31% -4.09% -23.05%  -23.96%       
      qoq
    25.06% 222.07% -79.38% 9.93% 10.61% 35.72% -17.84% -2.46% 52.21% -58.34% -25.99% -4.46% 29.91% 38.68% -13.35% 11.54% 37.43% -16.37% 20.38% 23.88% 170.02% -79.49% 23.59% 187.11% -34.80% -30.35% 2.26% 331.25% -65.34% -41.87% 34.43% 21.83% 687.46% -88.82% 51.06% 173.78% -70.24% 7.57% 72.12% 3.65% -12.71% 1378.16% -94.40% -1537.50% -110.29% -2.62% -49.70% 85.54% -81.10% 137.27% -4.42% 28.62% -75.18% 115.45% 40.75% -18.90%    24.45%   62.11% 489.56%   76.71% 30.36%   17.02% 86.07%   48.43% 2.64%   12.81% 42.71%   13.07% 14.50%      
      net income margin %
    5.98% 4.87% 1.47% 7.49% 7.78% 6.25% 5.24% 6.75% 6.82% 4.33% 9.44% 11.26% 11.78% 9.70% 7.19% 8.39% 8.90% 6.81% 7.91% 6.68% 6.11% 2.24% 10.17% 8.92% 3.55% 4.93% 6.75% 6.85% 1.88% 4.99% 8.35% 6.18% 5.63% 0.72% 6.33% 4.26% 1.79% 5.90% 5.37% 3.31% 3.38% 3.31% 0.23% 4.19% -0.30% 2.59% 2.50% 5.08% 3.04% 4.69% 6.05% 5.72% 5.03% 6.15% 8.13% 5.89% 7.47%  NaN% 7.45% 7.21% NaN% 10.52% 7.42% 1.50% NaN% 9.05% 5.95% 4.63% NaN% 8.69% 7.28% 4.56% NaN% 8.57% 5.99% 6.58% NaN% 7.09% 6.32% 4.72% NaN% 7.51% 7.01% 6.36% NaN% 11.20% 0% 0% 
      net income attributable to noncontrolling interests
    -25,000    -36,000 7,000 -16,000 -1,000 -7,000 -7,000 -15,000  -21,000   -9,000      12,000 -8,000                                                                   
      net income attributable to preformed line products company shareholders
    10,524,000 8,435,000 2,626,000 12,705,000 11,517,000 10,452,000 7,680,000 9,366,000 9,596,000 6,332,000 15,130,000 20,472,000 21,398,000 16,511,000 11,887,000 13,712,000 12,285,000 8,974,000 10,708,000 8,869,000 7,179,000 2,670,000 12,954,000 10,481,000 3,698,000 5,624,000 7,951,000 7,904,000                                                              
      average number of shares of common stock outstanding:
                                                                                             
      basic
    4,906,000 -7,000 4,915,000 4,932,000 4,928,000 -3,000 4,904,000 4,915,000 4,915,000 -9,000 4,906,000 4,944,000 4,937,000 -4,000 4,937,000 4,940,000 4,928,000 -2,000 4,900,000 4,912,000 4,917,000 -40,000 4,917,000 4,966,000 5,008,000 -8,000 5,024,000                                                               
      diluted
    4,927,000 -9,000 4,941,000 4,955,000 4,950,000 -12,000 4,977,000 4,964,000 4,944,000 -9,000 4,990,000 5,024,000 4,997,000 16,000 5,036,000 4,955,000 4,943,000 20,000 4,975,000 4,930,000 4,936,000 -14,000 5,011,000 4,973,000 5,017,000 10,000 5,119,000                                                               
      earnings per share of common stock attributable to preformed line products company shareholders:
                                                                                             
      basic
    2.15 1.72 0.53 2.58 2.34 2.14 1.57 1.91 1.95 1.31 3.08 4.14 4.33 3.35 2.41 2.78 2.49 1.83 2.19 1.81 1.46 0.58 2.63 2.11 0.74 1.12 1.58                                                               
      diluted
    2.14 1.72 0.53 2.56 2.33 2.13 1.54 1.89 1.94 1.29 3.03 4.08 4.28 3.28 2.36 2.77 2.49 1.79 2.15 1.8 1.45 0.55 2.59 2.11 0.74 1.1 1.55                                                               
      pension termination expense
      -11,657,000                                                                                       
      net expense attributable to noncontrolling interests
     -6,000 7,000 5,000                                                                                      
      goodwill impairment
                  6,529,000                                                                           
      net loss attributable to noncontrolling interests
               8,000  23,000 -2,000  -16,000 23,000 5,000 -22,000 2,000                                                                     
      other operating expense – net
                    756,000                                                                         
      other income – net
                    5,103,000                                                                         
      other operating expense - net
                     707,000 341,000 1,669,000 818,000 492,250 562,000 -225,000 1,122,000 361,750 775,000 325,000 348,000 737,500 1,150,000 1,465,000 335,000 170,250 206,000 369,000 104,000     2,102,500 4,425,000 252,000 3,731,000 656,500 3,324,000                                           
      other income - net
                     1,452,000 1,251,000 270,000 228,000 443,750 998,000 -282,000 549,000 76,500 138,000 97,000 71,000 66,750 94,000 105,000 69,000 64,750 122,000 81,000 55,000 -11,500 110,000 -208,000 52,000 -132,750 93,000 -682,000 57,000 59,000 162,000                                           
      net adjustment attributable to noncontrolling interests
                           -7,000                                                                  
      add: net adjustment attributable to noncontrolling interests
                            45,000                                                                 
      less: net income attributable to noncontrolling interests
                             -87,000 93,000                                                               
      less: net loss attributable to noncontrolling interests
                               -38,000                                                              
      weighted earnings per share of common stock attributable to preformed line products company shareholders:
                                                                                             
      basic
                               1.57                                                              
      diluted
                               1.56                                                              
      weighted-average number of shares of common stock outstanding:
                                                                                             
      basic
                               5,049                                                              
      diluted
                               5,058                                                              
      basic earnings per share
                                                                                             
      diluted earnings per share
                                                                                             
      weighted-average number of shares outstanding - basic
                                5,045 5,032 5,025 5,044 5,046 5,102 5,104 5,116 5,118 5,166 5,146 5,186 5,211 5,350 5,356 5,392 5,396 5,377 5,372 5,389 5,392 5,361     5,319 5,332                                  
      weighted-average number of shares outstanding - diluted
                                5,054 5,107 5,138 5,064 5,064 5,133 5,120 5,127 5,130 5,178 5,169 5,208 5,229 5,366 5,372 5,393 5,396 5,382 5,376 5,393 5,431 5,467     5,431 5,441                  5,416                
      cash dividends declared per share
                                 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2  0.8 0.2 0.2 0.2   0.2 0.2  0.2 0.2 0.2  0.2 0.2 0.2  0.2 0.2 0.2  0.2 0.2 0.2  0.2 0.2 0.2  0.2 0.2 0.2  0.2 0.2 0.2 
      income taxes
                                   2,489,000 2,101,000 6,989,000 3,461,000 2,102,000 600,000 1,889,000 1,792,000 1,018,000 998,000 2,113,000 1,935,000 786,000 197,000 1,885,000 2,739,000 2,526,000 1,399,000 8,767,000 2,440,000 4,294,000 1,952,000 11,415,000 4,126,000 3,317,000 4,058,000   4,520,000 3,395,000  4,002,000 1,197,000 561,000  2,190,000 1,721,000 1,590,000  2,807,000 2,382,000 1,526,000  2,769,000 2,808,000 1,794,000  2,022,000 1,840,000 1,095,000  2,529,000 1,781,000 2,043,000  2,995,000 2,280,000 264,000 
      other operating income - net
                                         -170,750 196,000 -27,000 -853,000                                                 
      weighted-average number of shares outstanding—basic
                                                      5,361 5,368 5,377 5,324   5,334  5,259                               
      weighted-average number of shares outstanding—diluted
                                                      5,449 5,450 5,457 5,371   5,438  5,358                               
      net income attributable to plpc common shareholders
                                                         3.75 1.75 1.24 1.52   1.59 1.33  1.89 1.16 0.22  1.21 0.69 0.52                     
      net loss attributable to noncontrolling interest, net of tax
                                                                -144,000                             
      net income attributable to plpc
                                                           6,596,000 8,133,000   8,386,000 6,998,000  9,879,000 6,096,000 1,132,000  6,320,000 3,584,000 2,722,000                     
      net income attributable to noncontrolling interest, net of tax
                                                               144,000   3,000    -61,000 -42,000 -5,000                     
      weighted-average number of shares outstanding — basic
                                                               5,263 5,272 5,242 5,238 5,253 5,252 5,232 5,235 5,231 5,225 5,279 5,218 5,296 5,382 5,372 5,379 5,369 5,360  5,638           
      weighted-average number of shares outstanding — diluted
                                                               5,393 5,400 5,335 5,390 5,402 5,403 5,366 5,316 5,311 5,305 5,339 5,269 5,345 5,431  5,437 5,421 5,406  5,688           
      net (loss) attributable to noncontrolling interest, net of tax
                                                                    -98,000                         
      other operating income
                                                                    -145,000                         
      income before income taxes and discontinued operations
                                                                      8,449,000 5,263,000 4,307,000                     
      income from continuing operations, net of tax
                                                                      6,259,000 3,542,000 2,717,000                     
      income from discontinued operations, net of tax
                                                                          -34,000 620,000                  
      income per share from continuing operations attributable to plpc shareholders
                                                                      1.21 0.69 0.52                     
      discontinued operations attributable to plpc common shareholders
                                                                                             
      amount attributable to plpc common shareholders
                                                                                             
      discontinued operations, net of tax
                                                                                             
      other operating expenses (income) — net
                                                                          462,000  -99,000  -169,000     121,000          
      income before income taxes, minority interests and discontinued operations
                                                                          9,421,000 7,329,000                  
      income before minority interests and discontinued operations
                                                                          6,614,000 4,947,000                  
      minority interests, net of tax
                                                                          -157,000 -78,000                  
      income from continuing operations
                                                                          6,457,000 4,869,000                  
      income per share from continuing operations — basic
                                                                          1.24 0.92                  
      income per share from discontinued operations — basic
                                                                          -0.01 0.12                  
      total net income per share — basic
                                                                          1.23 1.04                  
      income per share from continuing operations — diluted
                                                                          1.23 0.91                  
      income per share from discontinued operations — diluted
                                                                          -0.01 0.12                  
      total net income per share — diluted
                                                                          1.22 1.03                  
      other operating expenses — net
                                                                           233,000    104,000 186,000  136,000  61,000  112,000       
      royalty income — net
                                                                            319,000  345,000 761,000 381,000  287,000 371,000 346,000  576,000     281,000 364,000 
      other expense
                                                                            -2,000        -19,000  -27,000 -27,000 -27,000  -36,000 -40,000 -41,000 
      income before income taxes and minority interests
                                                                            4,509,000                 
      net income before minority interests
                                                                            2,983,000                 
      minority interests
                                                                            33,000                 
      net income per share
                                                                            0.55  1.05 0.71 0.69  0.71 0.62 0.43  0.73 0.65 0.56  0.96 -0.09 0.14 
      other expense — net
                                                                              -9,000 -7,000 -6,000  -19,000 -15,000          
      income before income taxes and minority interest
                                                                              8,457,000               
      income before minority interest
                                                                              5,688,000               
      minority interest
                                                                              24,000               
      average number of shares outstanding — basic
                                                                                   5,720 5,731  5,724     5,784 5,781 
      average number of shares outstanding — diluted
                                                                                   5,766 5,792  5,793     5,784 5,781 
      income before income taxes and equity in net income of joint venture
                                                                                      6,708,000 5,477,000      
      net income before joint venture
                                                                                      4,179,000 3,696,000      
      equity in net income of joint venture
                                                                                             
      other operating expenses – net
                                                                                       -185,000 115,000     
      royalty income – net
                                                                                       345,000 192,000     
      average number of shares outstanding – basic
                                                                                       5,726 5,719     
      average number of shares outstanding – diluted
                                                                                       5,784 5,776     
      income before income taxes and equity in net income of joint ventures
                                                                                        5,271,000     
      net income before joint ventures
                                                                                        3,228,000     
      equity in net income of joint ventures
                                                                                             
      costs and expenses selling
                                                                                          4,921,000   
      other operating expenses - net
                                                                                          -328,000   
      royalty income - net
                                                                                          856,000   
      equity in net income of foreign joint ventures
                                                                                          2,335,000 -59,000 17,000 
      average number of shares outstanding - basic
                                                                                          5,717   
      average number of shares outstanding - diluted
                                                                                          5,762   
      other operating expenses
                                                                                           91,000 -447,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2003-09-30 2003-06-30 
                                                                                               
        assets
                                                                                               
        cash, cash equivalents and restricted cash
      69,452,000 83,389,000 72,946,000 66,908,000 54,835,000 57,244,000 47,498,000 47,424,000 45,859,000 53,607,000 43,736,000 43,160,000 31,791,000 37,239,000 30,949,000 30,103,000 34,630,000 36,406,000                                                                        
        accounts receivable
      130,840,000 113,175,000 120,794,000 123,877,000 118,504,000 111,402,000 110,888,000 101,460,000 111,527,000 106,892,000                                                                                
        inventories
      151,810,000 148,730,000 146,089,000 143,369,000 135,098,000 129,913,000 142,726,000 141,812,000 141,508,000 148,814,000 149,643,000 148,481,000 149,784,000 147,458,000 134,582,000 127,408,000                                                                          
        prepaid expenses
      12,998,000 12,961,000 14,117,000 12,735,000 12,261,000 11,720,000 13,053,000 7,394,000 8,314,000 8,246,000 8,334,000 8,749,000 8,299,000 13,283,000 16,447,000 20,855,000 19,111,000 19,778,000                                                                        
        other current assets
      6,287,000 5,206,000 6,330,000 6,277,000 6,024,000 5,514,000 6,479,000 6,983,000 7,053,000 7,256,000 10,454,000 8,440,000 8,179,000 4,929,000 3,251,000 5,561,000 3,458,000 3,217,000 3,390,000 3,149,000 3,283,000 3,256,000 2,517,000 3,051,000 2,659,000 4,289,000 4,798,000 2,036,000 4,069,000 2,882,000 3,742,000 4,113,000 2,592,000 2,214,000 1,861,000 2,345,000 6,385,000 8,436,000 6,203,000 6,209,000 1,738,000 6,343,000 7,904,000 7,899,000 4,262,000 6,625,000 7,605,000 8,540,000 3,736,000 3,154,000 3,638,000 3,561,000 2,987,000 2,432,000 2,563,000 2,824,000 2,341,000 2,285,000 2,262,000 1,769,000 1,959,000 1,611,000 1,490,000 1,241,000 1,138,000 2,062,000                        
        total current assets
      371,387,000 363,461,000 360,276,000 353,166,000 326,722,000 315,793,000 320,644,000 305,073,000 314,261,000 324,815,000 338,186,000 353,423,000 339,167,000 328,170,000 308,165,000 307,049,000 299,076,000 272,111,000 271,403,000 258,602,000 240,038,000 256,314,000 245,922,000 238,221,000 222,483,000 231,975,000 232,914,000 237,221,000 220,948,000 214,263,000 215,910,000 214,419,000 217,775,000 207,130,000 206,772,000 195,516,000 196,009,000 189,107,000 192,225,000 182,631,000 182,264,000 188,497,000 193,505,000 200,475,000 191,207,000 200,663,000 204,713,000 204,096,000 196,300,000 185,734,000 198,691,000 195,739,000 199,183,000 194,101,000 207,736,000 209,585,000 210,071,000 205,490,000 196,087,000 200,811,000 186,185,000 167,342,000 166,094,000 143,292,000 142,474,000 138,959,000 137,322,000 126,342,000 114,354,000 112,670,000 127,576,000 125,502,000 123,327,000 119,188,000 126,339,000 119,557,000 112,051,000 105,536,000 109,314,000 115,060,000 111,772,000 110,393,000 112,634,000 106,317,000 103,851,000 101,603,000 101,225,000 81,313,000 83,516,000 
        property, plant and equipment
      225,279,000 222,781,000 217,781,000 211,923,000 203,083,000 195,086,000 201,194,000 200,441,000 203,242,000 207,892,000 201,105,000 200,325,000 196,151,000 175,011,000 159,884,000 157,444,000                                                                          
        operating lease, right-of-use assets
      9,160,000 9,708,000 9,932,000 10,458,000 10,138,000 10,117,000 10,742,000 10,594,000 11,021,000 11,671,000 11,635,000 10,862,000 10,756,000 10,752,000 9,973,000 10,987,000 11,793,000 12,400,000 12,872,000 13,414,000 12,426,000 13,139,000 12,762,000 12,989,000 13,062,000 12,453,000 12,512,000 13,011,000 10,067,000                                                             
        goodwill
      30,351,000 30,684,000 30,480,000 29,518,000 27,746,000 26,685,000 28,672,000 27,901,000 28,603,000 29,497,000 28,447,000 29,530,000 28,687,000 28,004,000 26,347,000 34,792,000 38,435,000 28,194,000 28,695,000 29,316,000 28,844,000 29,508,000 27,689,000 27,048,000 25,814,000 27,840,000 25,278,000 28,726,000 25,465,000 15,621,000 15,882,000 15,867,000 16,622,000 16,544,000 16,689,000 16,478,000 16,145,000 15,769,000 16,556,000 16,282,000 16,290,000 15,821,000 15,551,000 16,575,000 16,958,000 17,792,000 18,359,000 19,384,000 19,181,000 13,873,000 14,972,000 14,608,000 15,570,000 15,537,000 15,441,000 15,116,000 14,776,000 12,199,000 12,222,000 12,880,000 12,388,000 12,346,000 12,056,000 6,654,000 6,992,000 6,925,000 6,436,000 6,151,000 5,296,000 5,520,000 6,140,000 5,063,000 4,483,000 3,928,000                
        other intangible assets
      9,837,000 10,140,000 9,672,000 9,966,000 9,736,000 9,656,000 10,983,000 11,059,000 11,868,000 12,981,000 12,728,000 13,682,000 13,909,000 14,082,000 13,718,000 15,104,000                                                                          
        deferred income taxes
      6,794,000 7,481,000 7,310,000 7,204,000 6,284,000 6,546,000 9,502,000 7,721,000 7,379,000 7,109,000 6,925,000 6,415,000 6,147,000 5,320,000 5,904,000 5,551,000 5,645,000 3,839,000 8,948,000 9,191,000 5,459,000 10,863,000 6,515,000 6,275,000 6,094,000 7,564,000 8,220,000 7,462,000 6,737,000 6,900,000 7,830,000 8,023,000 7,908,000 7,774,000 10,321,000 10,897,000 10,469,000 10,208,000 13,910,000 13,642,000 12,746,000 8,608,000 8,886,000 8,334,000 8,052,000 7,249,000 7,081,000 6,231,000 6,463,000 7,022,000 6,752,000 5,884,000 6,091,000 6,557,000 5,642,000 6,111,000 4,754,000 5,263,000 6,262,000 5,341,000 5,974,000 4,784,000 3,557,000 3,452,000 3,142,000 3,256,000 2,184,000 3,225,000 2,612,000 2,786,000 3,218,000 2,976,000 3,555,000 3,209,000 3,885,000 3,413,000 3,380,000 2,639,000 4,430,000 3,912,000 4,160,000 3,870,000 4,008,000 3,998,000 3,774,000 3,727,000 3,149,000   
        other assets
      9,021,000 9,366,000 9,172,000 9,226,000 8,742,000 9,994,000 10,216,000 9,798,000 9,735,000 9,186,000 7,577,000 6,869,000 6,704,000 6,521,000 6,723,000 6,129,000 6,448,000 10,661,000 10,639,000 10,720,000 11,025,000 10,855,000 10,787,000 13,686,000 12,968,000 14,605,000 13,167,000 13,611,000 12,407,000 10,600,000 10,882,000 11,506,000 14,002,000 9,719,000 10,132,000 10,978,000 10,601,000 10,274,000 11,355,000 11,055,000 11,297,000 11,703,000 12,477,000 10,747,000 11,758,000 13,087,000 14,711,000 15,697,000 17,486,000 17,135,000 13,572,000 9,885,000 10,569,000 9,993,000 10,373,000 9,613,000 10,097,000 9,862,000 9,385,000 10,697,000 10,014,000 8,675,000 9,118,000 9,287,000 8,514,000 9,277,000 7,072,000 6,788,000 6,267,000 5,944,000 8,193,000 8,911,000 8,244,000 8,190,000 2,837,000 2,623,000 2,653,000 2,760,000 2,476,000 2,453,000 2,560,000 2,401,000 2,419,000 2,445,000 2,420,000 2,446,000    
        total assets
      661,829,000 653,621,000 644,623,000 631,461,000 592,451,000 573,877,000 591,953,000 572,587,000 586,109,000 603,151,000 606,603,000 621,942,000 602,248,000 568,479,000 530,714,000 537,056,000 534,500,000 489,018,000 493,593,000 483,409,000 457,003,000 461,087,000 452,041,000 436,266,000 413,257,000 433,571,000 425,004,000 425,153,000 387,128,000 358,797,000 363,969,000 364,080,000 375,961,000 359,785,000 362,625,000 351,571,000 350,540,000 340,937,000 352,618,000 342,245,000 330,770,000 324,573,000 331,721,000 345,044,000 337,869,000 353,967,000 362,114,000 367,933,000 358,584,000 332,406,000 345,042,000 335,021,000 342,757,000 333,064,000 344,068,000 342,958,000 348,988,000 327,348,000 312,235,000 321,296,000 301,863,000 280,979,000 279,005,000 240,076,000 240,418,000 235,372,000 221,344,000 208,101,000 191,272,000 190,875,000 211,343,000 212,342,000 210,957,000 203,866,000 202,266,000 188,974,000 179,892,000 170,963,000 171,468,000 177,141,000 171,258,000 168,547,000 170,018,000 162,332,000 160,258,000 158,808,000 155,473,000 147,235,000 150,841,000 
        liabilities and shareholders' equity
                                                                                               
        trade accounts payable
      56,766,000 49,520,000 48,858,000 51,137,000 45,252,000 41,951,000 42,426,000 42,945,000 41,748,000 37,788,000 51,451,000 50,033,000 56,273,000 46,839,000 48,124,000 49,217,000 51,499,000 42,376,000 38,501,000 38,737,000 33,945,000 31,646,000 30,299,000 30,866,000 28,534,000 28,282,000 28,607,000 28,727,000 25,743,000 26,414,000 29,749,000 28,240,000 27,653,000 25,141,000 24,725,000 24,145,000 23,893,000 21,978,000 26,373,000 20,677,000 21,455,000 20,377,000 22,392,000 23,582,000 19,572,000 22,332,000 24,686,000 23,781,000 22,483,000 21,750,000 23,837,000 26,246,000 24,212,000 21,822,000 24,981,000 26,342,000 26,256,000 25,630,000 27,317,000 27,623,000 27,710,000 27,001,000 24,684,000 20,405,000 19,484,000 18,764,000 17,188,000 16,037,000 14,520,000 14,632,000 19,041,000 19,553,000 20,848,000 16,083,000 17,073,000 16,155,000 14,865,000 11,606,000 12,840,000 13,416,000 11,624,000 10,878,000 11,480,000 10,723,000 10,102,000 11,111,000 10,683,000 7,952,000 8,765,000 
        notes payable to banks
      1,318,000 1,213,000 2,847,000 4,414,000 5,845,000 7,782,000 8,006,000 6,938,000 1,487,000 6,968,000 10,893,000 13,701,000 13,842,000 18,098,000 17,917,000 16,856,000 14,236,000 16,423,000 17,697,000 14,661,000 12,853,000 17,428,000 15,582,000 12,402,000 10,512,000 8,696,000 7,398,000 9,846,000 7,778,000 9,042,000 3,795,000 2,722,000 1,835,000 864,000 562,000 1,379,000 664,000 1,315,000 324,000 826,000 825,000 413,000 1,027,000 2,431,000 1,735,000 1,809,000 1,233,000 597,000 2,923,000 1,105,000 501,000  97,000 217,000 728,000 281,000 1,500,000 2,030,000 2,686,000 6,465,000 3,584,000 1,246,000 831,000 3,268,000 3,570,000 3,181,000 3,301,000 4,025,000 3,375,000 3,101,000 2,858,000 2,750,000 3,656,000 4,076,000 4,322,000 4,256,000 4,816,000 3,738,000 2,645,000 2,714,000 1,194,000 1,156,000 1,133,000 1,290,000 702,000 735,000 1,066,000 1,013,000 1,014,000 
        operating lease liabilities, current
      1,546,000 1,722,000 1,804,000 1,798,000 1,751,000 1,588,000 1,611,000 1,563,000 1,532,000 1,671,000 1,631,000 1,188,000 1,543,000 1,606,000 1,637,000 1,959,000 2,012,000 1,986,000 2,100,000 2,108,000 2,083,000 2,240,000 2,214,000 2,170,000 1,991,000 2,062,000 2,090,000 2,142,000 2,005,000                                                             
        current portion of long-term debt
      5,891,000 5,392,000 4,660,000 3,928,000 3,378,000 2,430,000 2,618,000 2,812,000 7,078,000 6,486,000 6,680,000 6,889,000 3,026,000 3,018,000 3,183,000 3,217,000 3,261,000 3,116,000 3,114,000 6,717,000 9,033,000 5,216,000 7,198,000 2,789,000 3,309,000 3,354,000 2,719,000 2,279,000 1,494,000 1,448,000 1,448,000 1,448,000 1,448,000 1,448,000 1,448,000 1,448,000 1,448,000 1,448,000 1,569,000 1,564,000 117,000 110,000 104,000 112,000 111,000 116,000 123,000 138,000 162,000 195,000 191,000 267,000 184,000 251,000 356,000 453,000 584,000 601,000 605,000 722,000 1,258,000 1,276,000 1,253,000 1,080,000 1,480,000 1,330,000 967,000 894,000 428,000 494,000 948,000 1,630,000 1,602,000 1,949,000 1,434,000 1,795,000 2,168,000 2,157,000 3,404,000 3,320,000 3,413,000 4,806,000 1,736,000 1,303,000 1,401,000 1,272,000 1,653,000 3,636,000 3,809,000 
        accrued compensation and other benefits
      24,084,000 29,207,000 30,728,000 25,574,000 20,788,000 25,904,000 29,499,000 24,398,000 23,348,000      28,431,000 24,313,000 20,415,000                                                                         
        accrued expenses and other liabilities
      29,644,000 22,407,000 24,452,000 25,582,000 26,608,000 25,503,000 26,229,000 22,574,000 20,961,000 27,414,000 26,919,000 22,727,000 19,199,000 17,635,000 17,534,000 22,315,000 21,658,000 17,522,000 22,055,000 18,412,000 18,001,000 17,508,000 14,931,000 13,564,000 13,993,000 16,718,000 17,806,000 19,354,000 17,414,000 12,582,000 13,047,000 12,532,000 13,329,000 14,686,000 17,199,000 13,660,000 14,690,000 12,331,000 13,931,000 13,990,000 13,373,000 13,334,000 12,923,000 12,555,000 12,044,000 13,021,000 10,958,000 9,707,000 9,998,000 11,118,000 10,286,000 10,206,000 11,255,000 11,865,000 15,179,000 14,674,000 14,287,000 12,510,000 13,027,000 13,673,000 9,772,000 9,088,000 10,275,000 7,490,000 8,486,000 8,375,000 7,517,000 6,484,000 5,224,000 4,574,000 9,223,000 7,672,000 7,164,000 7,507,000 6,093,000 6,497,000 4,865,000 4,551,000 5,284,000 5,243,000 5,437,000 6,406,000 4,938,000 4,969,000 4,814,000 4,368,000 4,019,000 4,349,000 5,290,000 
        dividends payable
      1,175,000 1,277,000 1,198,000 1,173,000 1,146,000 1,293,000 1,257,000 1,224,000 1,189,000 1,300,000 1,262,000 1,228,000 1,194,000 1,318,000 1,277,000 1,238,000 1,350,000 1,301,000 1,261,000 1,222,000 1,183,000 1,292,000 1,256,000 1,220,000 1,205,000 1,173,000 1,132,000 1,092,000 1,055,000 1,051,000 1,050,000 1,055,000 1,058,000 1,046,000 1,050,000 1,055,000 1,055,000 1,037,000 1,040,000 1,059,000 1,067,000 1,057,000 1,073,000 1,109,000 1,110,000 1,220,000 1,100,000 1,107,000 1,107,000 1,098,000 1,106,000 1,106,000  102,000 1,099,000 1,104,000 1,104,000 1,095,000 1,095,000 1,098,000 1,101,000 1,087,000 1,085,000 1,091,000 1,091,000 1,076,000 1,072,000 1,073,000 1,071,000 1,054,000 1,053,000 1,043,000 1,076,000 1,076,000 1,076,000 1,076,000 1,072,000 1,072,000 1,072,000 1,145,000 1,144,000 1,147,000 1,146,000 1,144,000 1,146,000 1,141,000 1,143,000 1,157,000 1,157,000 
        income taxes payable
      3,167,000 3,972,000 1,896,000 1,165,000 1,149,000 1,962,000 2,353,000 1,530,000 2,361,000 1,672,000 6,756,000 5,794,000 7,803,000 2,465,000 2,359,000 555,000 1,066,000 1,108,000 824,000 617,000 648,000 5,456,000 2,467,000 1,668,000 1,240,000 1,758,000 2,814,000 1,337,000 1,018,000 815,000 912,000 1,199,000 1,898,000 1,903,000 1,157,000 1,038,000 972,000 1,055,000 1,221,000 907,000 1,183,000 195,000 193,000 191,000 1,726,000 1,735,000    1,556,000    2,304,000              1,225,000 954,000 1,100,000 2,089,000 1,161,000 960,000 772,000                
        total current liabilities
      123,591,000 114,710,000 116,443,000 114,771,000 105,917,000 108,413,000 113,999,000 103,984,000 99,704,000 111,317,000 135,802,000 126,770,000 125,217,000 115,335,000 120,462,000 119,670,000 115,497,000 105,535,000 114,356,000 107,446,000 97,673,000 103,774,000 98,195,000 84,338,000 74,451,000 81,073,000 83,482,000 83,502,000 70,938,000 69,487,000 70,403,000 64,822,000 61,592,000 62,833,000 65,568,000 59,080,000 55,890,000 55,455,000 62,818,000 54,389,000 50,520,000 51,891,000 55,758,000 55,336,000 48,716,000 55,327,000 59,884,000 53,332,000 52,362,000 52,215,000 57,076,000 56,631,000 55,705,000 58,243,000 68,317,000 66,525,000 63,377,000 61,833,000 70,796,000 72,548,000 62,716,000 56,558,000 58,934,000 48,675,000 46,410,000 46,340,000 44,899,000 41,087,000 37,011,000 35,248,000 48,284,000 45,452,000 44,937,000 42,349,000 43,493,000 40,582,000 37,377,000 33,405,000 39,058,000 36,816,000 34,258,000 34,725,000 32,367,000 28,585,000 28,066,000 27,922,000 30,667,000 28,704,000 30,248,000 
        long-term debt, less current portion
      34,737,000 32,860,000 31,346,000 27,878,000 25,682,000 18,357,000 24,582,000 28,820,000 47,928,000 48,796,000 45,269,000 68,944,000 68,374,000 68,420,000 55,944,000 57,502,000 60,594,000 40,048,000 42,424,000 42,066,000 37,394,000 33,333,000 45,220,000 57,657,000 58,724,000 53,722,000 52,888,000 55,222,000 41,769,000 24,960,000 32,681,000 37,308,000 43,793,000 34,598,000 32,828,000 36,570,000 45,319,000 42,943,000 44,227,000 44,593,000 35,845,000 31,754,000 31,659,000 30,743,000 30,741,000 31,749,000 32,134,000 34,149,000 31,931,000 13,054,000 14,951,000 12,444,000 16,077,000 9,322,000 14,940,000 25,464,000 33,652,000 27,991,000 13,381,000 14,189,000 14,798,000 9,374,000 14,456,000 3,704,000 7,646,000 3,099,000 3,441,000 2,930,000 2,491,000 2,653,000 2,854,000 3,200,000 3,217,000 3,010,000 3,523,000 1,694,000 1,740,000 2,204,000 1,836,000 1,925,000 1,761,000 122,000 2,452,000 2,501,000 2,570,000 2,362,000 2,105,000 253,000 1,300,000 
        operating lease liabilities, noncurrent
      5,513,000 5,957,000 6,180,000 6,656,000 6,455,000 6,538,000 6,992,000 7,011,000 7,391,000  7,907,000 7,496,000 7,108,000                                                                             
        other noncurrent liabilities
      18,943,000 18,836,000 18,661,000 17,883,000 15,559,000 14,479,000 14,556,000 14,347,000 14,304,000 15,454,000 14,816,000 16,978,000 17,329,000 14,912,000 12,552,000 12,936,000 14,147,000 12,737,000 11,753,000 13,017,000 14,284,000 14,421,000 13,246,000 13,446,000 11,799,000 13,568,000 11,850,000 11,526,000 8,936,000 8,010,000 7,720,000 10,582,000 10,926,000 11,063,000 7,275,000 6,825,000 6,704,000 6,495,000 6,073,000 5,950,000 5,741,000 6,675,000 6,865,000 6,434,000 6,355,000 6,445,000 5,957,000 6,000,000 5,924,000 4,603,000 4,692,000 4,553,000 4,496,000 4,457,000 3,896,000 3,855,000 3,942,000 3,790,000 3,494,000 4,889,000 4,811,000 4,735,000 3,061,000 2,924,000 1,826,000 3,021,000 2,757,000 2,632,000 2,437,000 2,540,000 1,962,000 2,018,000 2,022,000 1,772,000                
        shareholders' equity
                                                                                               
        common shares 2 par value per share, 15,000,000 shares authorized, 4,888,012 and 4,907,787 issued and outstanding, at march 31, 2026 and december 31, 2025
      13,890,000                                                                                         
        common shares issued to rabbi trust, 222,506 and 222,506 shares at march 31, 2026 and december 31, 2025, respectively
      -9,586,000                                                                                         
        deferred compensation liability
      9,586,000 9,586,000 9,586,000 9,613,000 9,594,000 9,575,000 9,557,000 10,233,000 10,214,000 10,183,000 10,069,000 10,039,000 10,076,000 10,261,000 10,261,000 10,231,000 10,201,000 10,102,000 10,102,000 10,850,000 10,820,000 10,940,000 10,940,000 10,910,000 10,880,000 10,981,000 10,981,000 11,066,000 11,038,000 11,008,000 11,008,000 10,988,000 11,849,000 11,834,000 12,109,000 12,089,000 12,069,000 12,054,000 12,054,000 12,034,000 12,014,000 12,052,000 11,657,000 11,637,000 11,617,000 11,790,000 9,196,000 9,176,000 9,156,000 9,306,000 6,577,000 6,557,000 6,517,000 6,522,000 3,867,000 3,847,000 3,807,000 3,812,000 1,280,000                               
        paid-in capital
      66,047,000 67,217,000 65,641,000 64,019,000 62,205,000 65,093,000 63,108,000 62,361,000 61,408,000 60,958,000 59,548,000 56,943,000 54,956,000 53,646,000 51,749,000 49,918,000 48,847,000 47,814,000 46,956,000 45,564,000 44,322,000 43,134,000 42,047,000 40,385,000 39,747,000 38,854,000 37,642,000 36,200,000 35,146,000 34,401,000 33,284,000 31,657,000 30,576,000 29,734,000 26,983,000 25,916,000 25,315,000 24,629,000 24,200,000 23,536,000 23,299,000 22,916,000 22,344,000 23,311,000 23,342,000 22,795,000 22,190,000                                           
        retained earnings
      593,869,000 584,360,000 576,985,000 575,368,000 563,678,000 553,179,000 543,743,000 537,079,000 528,733,000 520,154,000 514,839,000 500,726,000 481,278,000 460,930,000 445,460,000 434,718,000 421,921,000 410,673,000 402,720,000 393,032,000 385,184,000 379,035,000 377,384,000 365,443,000 355,984,000 353,292,000 348,710,000 341,804,000 334,947,000 334,170,000 329,959,000 321,954,000 316,275,000 311,765,000 312,206,000 306,979,000 303,877,000 303,415,000 299,351,000 295,618,000 293,923,000 292,311,000 241,557,000 245,346,000 242,900,000 244,470,000 243,074,000 243,521,000 239,548,000 238,168,000 239,703,000 235,052,000 232,456,000 227,622,000 225,199,000 218,844,000 213,451,000 206,512,000 198,668,000 194,075,000 189,957,000 184,060,000 179,140,000 171,048,000 166,122,000 165,953,000 156,086,000 150,938,000 148,261,000 146,624,000 144,917,000 139,547,000 142,069,000 140,339,000 140,716,000 136,128,000 133,686,000 131,734,000 130,774,000 138,617,000 136,217,000 135,481,000 135,745,000 132,712,000 130,672,000 128,738,000 126,441,000 121,209,000 122,876,000 
        treasury shares, at cost, 2,056,379 and 2,021,940 shares at march 31, 2026 and december 31, 2025, respectively
      -145,492,000                                                                                         
        accumulated other comprehensive loss
      -54,790,000 -53,365,000 -55,476,000 -62,311,000 -76,115,000 -82,909,000 -65,092,000 -72,664,000 -66,782,000 -60,306,000 -70,431,000 -63,586,000 -65,976,000 -69,987,000 -81,757,000 -69,629,000 -59,529,000 -61,719,000 -60,221,000 -54,842,000 -59,266,000 -54,551,000 -65,549,000 -68,573,000 -74,136,000 -57,353,000 -62,733,000 -56,944,000 -58,137,000 -59,583,000 -57,239,000 -56,792,000 -43,517,000 -47,440,000 -45,922,000 -48,932,000 -51,825,000 -57,369,000 -50,609,000 -51,986,000 -50,207,000 -54,151,000 -53,907,000 -44,005,000 -43,662,000 -35,134,000 -23,383,000 -13,572,000 -15,870,000 -17,702,000 -19,198,000 -21,651,000 -13,167,000 -13,664,000 -15,915,000 -18,692,000 -11,657,000 -17,039,000 -11,448,000 -244,000 -3,447,000 -6,010,000 -8,051,000 -15,591,000 -11,481,000 -11,369,000 -13,549,000 -18,421,000 -27,765,000 -24,511,000 -7,442,000  -2,192,000 -4,100,000 -7,566,000 -10,009,000 -12,331,000 -13,084,000 -12,821,000 -13,504,000 -14,118,000 -14,645,000 -13,360,000 -14,158,000 -13,619,000 -12,359,000 -15,906,000   
        total preformed line products company shareholders' equity
      473,524,000 475,518,000 466,305,000 460,736,000 435,776,000 422,315,000 428,971,000 416,218,000 413,369,000 416,164,000 399,813,000 398,449,000 380,706,000 358,637,000    316,117,000    292,078,000    268,535,000                                                                
        noncontrolling interest
      58,000 33,000 33,000 40,000 45,000 9,000 16,000  -1,000 -8,000 15,000  8,000 -13,000 10,000 8,000 -1,000 -17,000 6,000 11,000 -11,000 -9,000 3,000 -5,000 -12,000 33,000 54,000 -38,000                                 -832,000 -675,000 -635,000 -268,000 -386,000 -145,000 424,000 487,000 719,000                     
        total shareholders' equity
      473,582,000 475,551,000 466,338,000 460,776,000 435,821,000 422,324,000 428,987,000 416,218,000 413,368,000 416,156,000 399,828,000 398,449,000 380,714,000 358,624,000    316,100,000    292,069,000    268,568,000    249,370,000    238,537,000    223,543,000                                                    
        total liabilities and shareholders' equity
      661,829,000 653,621,000 644,623,000 631,461,000 592,451,000 573,877,000 591,953,000 572,587,000 586,109,000 603,151,000 606,603,000 621,942,000 602,248,000 568,479,000    489,018,000    461,087,000    433,571,000    358,797,000    359,785,000    340,937,000                                                    
        common shares 2 par value per share, 15,000,000 shares authorized, 4,907,787 and 4,913,621 issued and outstanding, at december 31, 2025 and december 31, 2024, respectively
       13,860,000                                                                                        
        common shares issued to rabbi trust, 222,506 and 222,887 shares at december 31, 2025 and december 31, 2024, respectively
       -9,586,000                                                                                        
        treasury shares, at cost, 2,021,940 and 1,961,772 shares at december 31, 2025 and december 31, 2024, respectively
       -136,554,000                                                                                        
        common shares 2 par value per share, 15,000,000 shares authorized, 4,901,871 and 4,913,621 issued and outstanding, at september 30, 2025 and december 31, 2024
        13,831,000                                                                                       
        common shares issued to rabbi trust, 222,506 and 222,887 shares at september 30, 2025 and december 31, 2024, respectively
        -9,586,000                                                                                       
        treasury shares, at cost, 2,013,240 and 1,961,772 shares at september 30, 2025 and december 31, 2024, respectively
        -134,676,000                                                                                       
        common shares 2 par value per share, 15,000,000 shares authorized, 4,924,737 and 4,913,621 issued and outstanding, at june 30, 2025 and december 31, 2024
         13,823,000                                                                                      
        common shares issued to rabbi trust, 223,168 and 222,887 shares at june 30, 2025 and december 31, 2024, respectively
         -9,613,000                                                                                      
        treasury shares, at cost, 1,986,382 and 1,961,772 shares at june 30, 2025 and december 31, 2024, respectively
         -130,163,000                                                                                      
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,940,131 and 4,913,621 issued and outstanding, at march 31, 2025 and december 31, 2024
          13,820,000                                                                                     
        common shares issued to rabbi trust, 223,034 and 222,887 shares at march 31, 2025 and december 31, 2024, respectively
          -9,594,000                                                                                     
        treasury shares, at cost, 1,969,354 and 1,961,772 shares at march 31, 2025 and december 31, 2024, respectively
          -127,812,000                                                                                     
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,913,621 and 4,908,413 issued and outstanding, at december 31, 2024 and december 31, 2023, respectively
           13,752,000                                                                                    
        common shares issued to rabbi trust, 222,887 and 243,118 shares at december 31, 2024 and december 31, 2023, respectively
           -9,575,000                                                                                    
        treasury shares, at cost, 1,961,772 and 1,894,419 shares at december 31, 2024 and december 31, 2023, respectively
           -126,800,000                                                                                    
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,897,450 and 4,908,413 issued and outstanding, at september 30, 2024 and december 31, 2023
            13,715,000                                                                                   
        common shares issued to rabbi trust, 222,741 and 243,118 shares at september 30, 2024 and december 31, 2023, respectively
            -9,557,000                                                                                   
        treasury shares, at cost, 1,959,512 and 1,894,419 shares at september 30, 2024 and december 31, 2023, respectively
            -126,503,000                                                                                   
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,913,496 and 4,908,413 issued and outstanding, at june 30, 2024 and december 31, 2023
             13,711,000                                                                                  
        common shares issued to rabbi trust, 238,787 and 243,118 shares at june 30, 2024 and december 31, 2023, respectively
             -10,233,000                                                                                  
        treasury shares, at cost, 1,941,690 and 1,894,419 shares at june 30, 2024 and december 31, 2023, respectively
             -124,269,000                                                                                  
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,918,036 and 4,908,413 issued and outstanding, at march 31, 2024 and december 31, 2023
              13,711,000                                                                                 
        common shares issued to rabbi trust, 238,641 and 243,118 shares at march 31, 2024 and december 31, 2023, respectively
              -10,214,000                                                                                 
        treasury shares, at cost, 1,937,150 and 1,894,419 shares at march 31, 2024 and december 31, 2024, respectively
              -123,701,000                                                                                 
        accrued compensation
               18,441,000 23,192,000 19,919,000 18,698,000 14,962,000    13,756,000 21,933,000                                                                       
        accrued profit-sharing and other benefits
               9,577,000 7,018,000 5,291,000 3,639,000 9,394,000    7,947,000 6,871,000 5,022,000 3,104,000 8,252,000 6,484,000 4,443,000 2,447,000 7,213,000 5,959,000 4,312,000 2,903,000 6,982,000 6,055,000 4,195,000 2,718,000 6,284,000 5,578,000 4,000,000 2,703,000 6,251,000 5,643,000  3,019,000 5,648,000 5,082,000 3,886,000 2,521,000 5,151,000 5,161,000 3,818,000 2,332,000 5,086,000 4,842,000 3,599,000 2,656,000 5,387,000 5,211,000 4,231,000 2,699,000 4,686,000 4,558,000 3,386,000 2,618,000 4,464,000 3,947,000 2,652,000 1,859,000 3,890,000 3,239,000 2,424,000 4,001,000 3,687,000 3,330,000 2,493,000 1,843,000 3,577,000 3,779,000 2,826,000 2,332,000 3,596,000            
        operating lease liabilities, non-current
               7,892,000    7,023,000 6,331,000 6,959,000 7,567,000 8,154,000 8,654,000 9,202,000 8,190,000 8,743,000 8,528,000 8,642,000 8,675,000 8,246,000 8,366,000 8,806,000 8,379,000                                                             
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,908,413 and 4,917,020 issued and outstanding, at december 31, 2023 and december 31, 2022, respectively
               13,607,000                                                                                
        common shares issued to rabbi trust, 243,118 and 245,386 shares at december 31, 2023 and december 31, 2022, respectively
               -10,183,000                                                                                
        treasury shares, at cost, 1,894,419 and 1,758,901 shares at december 31, 2023 and december 31, 2022, respectively
               -118,249,000                                                                                
        accounts receivable, less allowances
                126,019,000 144,593,000 141,114,000 125,261,000 122,936,000 123,122,000 115,764,000 98,203,000 108,034,000 104,674,000 93,654,000 92,686,000 96,712,000 94,840,000 83,441,000 83,517,000 85,842,000 91,767,000 73,604,000 73,139,000 87,034,000 78,107,000 77,421,000 73,972,000 80,370,000 79,686,000 70,513,000 63,415,000 69,473,000 65,060,000 67,728,000 63,626,000 66,195,000 63,270,000 63,426,000 67,942,000 72,772,000 75,864,000 74,957,000 67,587,000 73,917,000 67,089,000 66,713,000 61,695,000 75,805,000 73,343,000 74,534,000 68,949,000 68,959,000 74,970,000 62,294,000 56,102,000 63,437,000 51,894,000 49,277,000 49,245,000 45,937,000 41,285,000 41,006,000 36,899,000 46,752,000 48,275,000 42,368,000 40,482,000 43,768,000 40,535,000 38,336,000 30,029,000 36,389,000 34,975,000 33,870,000 26,481,000        
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,893,469 and 4,917,020 issued and outstanding, at september 30, 2023 and december 31, 2022
                13,559,000                                                                               
        common shares issued to rabbi trust, 241,528 and 245,386 shares at september 30, 2023 and december 31, 2022, respectively
                -10,069,000                                                                               
        treasury shares, at cost, 1,891,268 and 1,758,901 shares at september 30, 2023 and december 31, 2022, respectively
                -117,702,000                                                                               
        pension asset
                 836,000 727,000 619,000                                                                            
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,917,501 and 4,917,020 issued and outstanding, at june 30, 2023 and december 31, 2022
                 13,509,000                                                                              
        common shares issued to rabbi trust, 241,343 and 245,386 shares at june 30, 2023 and december 31, 2022, respectively
                 -10,039,000                                                                              
        treasury shares, at cost, 1,840,552 and 1,758,901 shares at june 30, 2023 and december 31, 2022, respectively
                 -109,143,000                                                                              
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,947,924 and 4,917,020 issued and outstanding, at march 31, 2023 and december 31, 2022
                  13,491,000                                                                             
        common shares issued to rabbi trust, 241,151 and 245,386 shares at march 31, 2023 and december 31, 2022, respectively
                  -10,076,000                                                                             
        treasury shares, at cost, 1,800,474 and 1,758,901 shares at march 31, 2023 and december 31, 2022, respectively
                  -103,043,000                                                                             
        pension obligation
                    560,000 3,056,000 3,350,000 3,653,000 4,923,000                                                                       
        common shares – 2 par value per share, 15,000,000 shares authorized, 4,917,020 and 4,907,143 issued and outstanding, at december 31, 2022 and december 31, 2021, respectively
                   13,351,000                                                                            
        common shares issued to rabbi trust, 245,386 and 243,138 shares at december 31, 2022 and december 31, 2021, respectively
                   -10,261,000                                                                            
        treasury shares, at cost, 1,758,901 and 1,685,387 shares at december 31, 2022 and december 31, 2021, respectively
                   -99,303,000                                                                            
        liabilities and shareholders’ equity
                                                                                               
        shareholders’ equity
                                                                                               
        shareholders’ equity:
                                                                                               
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,919,841 and 4,907,143 issued and outstanding, at september 30, 2022 and december 31, 2021, respectively
                    13,316,000                                                                           
        common shares issued to rabbi trust, 245,386 and 243,138 shares at september 30, 2022 and december 31, 2021, respectively
                    -10,261,000                                                                           
        treasury shares, at cost, 1,741,727 and 1,685,387 shares at september 30, 2022 and december 31, 2021, respectively
                    -97,771,000                                                                           
        total preformed line products, company shareholders’ equity
                    330,997,000 332,679,000 328,910,000  308,790,000 303,632,000 291,149,000  279,575,000 264,161,000 251,512,000  259,663,000                                                               
        total shareholders’ equity
                    331,007,000 332,687,000 328,909,000  308,796,000 303,643,000 291,138,000  279,578,000 264,156,000 251,500,000  259,717,000 257,814,000 250,203,000  246,405,000 239,529,000 247,021,000  244,652,000 236,597,000 230,133,000  226,466,000 223,017,000 224,268,000 218,984,000 220,586,000 235,433,000 233,367,000 242,925,000 252,590,000 262,734,000 256,410,000 252,330,000 251,055,000 242,795,000 246,839,000 241,069,000 235,213,000 225,008,000 225,698,000 212,858,000 209,809,000 214,394,000 204,518,000 195,465,000 188,670,000 172,997,000 171,209,000 170,821,000 158,798,000 148,088,000 135,761,000 136,265,000 151,323,000 154,001,000 153,459,000 149,721,000 146,336,000 139,246,000 133,701,000 130,933,000 130,189,000 138,010,000 134,853,000 133,543,000 134,988,000 131,023,000 129,439,000 128,337,000 122,479,000 117,297,000 118,220,000 
        total liabilities and shareholders’ equity
                    530,714,000 537,056,000 534,500,000  493,593,000 483,409,000 457,003,000  452,041,000 436,266,000 413,257,000  425,004,000 425,153,000 387,128,000  363,969,000 364,080,000 375,961,000  362,625,000 351,571,000 350,540,000  352,618,000 342,245,000 330,770,000 324,573,000 331,721,000 345,044,000 337,869,000 353,967,000 362,114,000 367,933,000 358,584,000 332,406,000 345,042,000 335,021,000 342,757,000 333,064,000 344,068,000 342,958,000 348,988,000 327,348,000 312,235,000 321,296,000 301,863,000 280,979,000 279,005,000 240,076,000 240,418,000 235,372,000 221,344,000 208,101,000 191,272,000 190,875,000 211,343,000 212,342,000 210,957,000 203,866,000 202,266,000 188,974,000 179,892,000 170,963,000 171,468,000 177,141,000 171,258,000 168,547,000 170,018,000 162,332,000 160,258,000 158,808,000 155,473,000 147,235,000 150,841,000 
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,940,578 and 4,907,143 issued and outstanding, at june 30, 2022 and december 31, 2021, respectively
                     13,303,000                                                                          
        common shares issued to rabbi trust, 244,969 and 243,138 shares at june 30, 2022 and december 31, 2021, respectively
                     -10,231,000                                                                          
        treasury shares, at cost, 1,714,822 and 1,685,387 shares at june 30, 2022 and december 31, 2021, respectively
                     -95,631,000                                                                          
        inventories – net
                      126,113,000                                                                   35,337,000 35,104,000     
        property, plant and equipment – net
                      156,434,000                                                                         
        other intangible assets – net
                      16,669,000                                                                         
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,940,094 and 4,907,143 issued and outstanding, at march 31, 2022 and december 31, 2021, respectively
                      13,302,000                                                                         
        common shares issued to rabbi trust, 244,485 and 243,138 shares at march 31, 2022 and december 31, 2021, respectively
                      -10,201,000                                                                         
        treasury shares, at cost, 1,714,822 and 1,685,387 shares at march 31, 2022 and december 31, 2021, respectively
                      -95,631,000                                                                         
        inventories - net
                       114,507,000 108,603,000 105,428,000 99,694,000 97,537,000 94,315,000 95,454,000 92,513,000 95,718,000 92,227,000 92,732,000 87,557,000 85,259,000 82,402,000 83,212,000 83,342,000 77,886,000 75,675,000 75,498,000 77,440,000 74,484,000 73,665,000 72,139,000 70,302,000 69,912,000 73,071,000 78,133,000 76,097,000 80,037,000 79,415,000 78,986,000 79,638,000 73,835,000     87,789,000 88,685,000   85,014,000                           36,264,000 33,516,000   
        property, plant and equipment - net
                       149,774,000 148,097,000 148,511,000 145,400,000 125,965,000 134,440,000 124,261,000 119,356,000 124,018,000 117,697,000 112,263,000 103,186,000 102,955,000 104,608,000 105,172,000 109,836,000 108,598,000 108,307,000 107,234,000 106,812,000 105,104,000 107,327,000 107,235,000 96,708,000 91,965,000 92,209,000 97,543,000 97,886,000 102,531,000 105,138,000 108,202,000 105,146,000 100,461,000     90,017,000 88,360,000                                  
        other intangible assets - net
                       12,039,000 12,939,000                                                                       
        shareholders' equity:
                                                                                               
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,907,143 and 4,902,233 issued and outstanding, at december 31, 2021 and december 31, 2020, respectively
                       13,185,000                                                                        
        common shares issued to rabbi trust, 243,138 and 265,508 shares at december 31, 2021 and december 31, 2020, respectively
                       -10,102,000                                                                        
        treasury shares, at cost, 1,685,387 and 1,611,927 shares at december 31 and
                                                                                               
        december 31, 2020, respectively
                       -93,836,000                                                                        
        cash and cash equivalents
                        38,326,000 33,454,000 34,685,000 45,175,000 41,248,000 36,507,000 34,117,000 38,929,000 41,158,000 41,260,000 43,457,000 43,609,000 34,032,000 41,395,000 45,488,000 44,358,000 39,163,000 28,002,000 31,034,000 30,737,000 32,940,000 28,143,000 31,363,000 30,393,000 26,870,000 30,730,000 30,530,000 29,643,000 28,722,000 24,585,000 21,173,000 24,291,000 31,153,000 31,198,000 27,024,000 28,120,000 28,115,000 30,398,000 29,186,000 32,126,000 23,751,000 23,617,000 24,146,000 22,655,000 22,337,000 22,110,000 24,751,000 24,097,000 35,520,000 27,701,000 20,795,000 19,869,000 24,775,000 23,331,000 21,831,000 23,392,000 20,574,000 23,529,000 21,392,000 29,949,000 26,026,000 34,424,000 32,443,000 39,592,000 34,880,000 31,219,000 31,553,000 29,744,000 30,008,000 14,871,000 14,002,000 
        prepaid tax expense
                        2,754,000                                                                       
        other prepaid expenses
                        10,296,000                                                                       
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,899,945 and 4,902,233 issued and outstanding, at september 30, 2021 and december 31, 2020, respectively
                        13,171,000                                                                       
        common shares issued to rabbi trust, 243,138 and 265,508 shares at september 30, 2021 and december 31, 2020, respectively
                        -10,102,000                                                                       
        treasury shares, at cost, 1,685,387 and 1,611,927 shares at september 30, 2021 and december 31, 2020, respectively
                        -93,836,000                                                                       
        prepaids
                         10,169,000 7,642,000 15,289,000 8,336,000 6,518,000 6,255,000 6,921,000 6,821,000 7,299,000 7,664,000 6,205,000 6,756,000 5,369,000 5,274,000 3,434,000 4,814,000 4,040,000 4,248,000 3,353,000 4,433,000 4,686,000 5,047,000 4,030,000 5,908,000 6,480,000 4,963,000 6,926,000 5,245,000 5,717,000 6,218,000 6,112,000 6,108,000 6,169,000 6,901,000 5,652,000 5,384,000 5,822,000 5,824,000 6,321,000 7,938,000 10,155,000 8,638,000 9,069,000 3,477,000 3,705,000 5,873,000 4,263,000                        
        prepaid taxes
                         1,728,000 1,080,000 2,371,000 2,794,000 1,851,000 3,498,000 2,601,000 2,068,000 2,127,000 4,597,000 3,169,000 1,944,000 2,223,000 3,658,000 5,266,000 4,889,000 5,945,000 6,389,000 8,682,000 5,511,000 6,394,000 6,086,000 5,585,000 4,671,000 5,629,000 3,877,000 2,241,000 3,873,000 4,173,000 4,115,000 3,733,000 3,193,000 3,146,000 3,159,000 2,729,000 2,438,000 2,402,000 1,570,000 1,933,000 1,901,000 2,679,000 2,060,000  3,927,000 3,759,000                          
        intangibles - net
                         13,655,000 13,811,000 14,443,000 13,926,000 13,786,000 13,480,000 15,116,000 15,216,000 12,859,000 8,318,000 8,458,000 8,857,000 9,093,000 9,818,000 10,020,000 10,404,000 10,468,000 10,504,000 10,475,000                                                    
        accrued compensation and amounts withheld from employees
                         19,950,000 16,823,000 14,736,000 17,764,000 15,216,000 11,220,000 11,817,000 14,957,000 14,413,000 11,528,000 11,153,000 14,347,000 13,431,000 11,653,000 11,461,000 13,849,000 12,355,000 10,465,000 10,040,000 12,717,000 11,338,000 9,481,000 9,306,000 12,318,000 10,924,000 10,318,000 9,876,000 14,468,000 12,640,000 11,856,000 10,787,000 15,214,000 14,295,000 13,684,000 12,271,000 17,154,000 15,416,000 14,137,000 11,472,000 16,078,000 14,482,000 12,419,000 9,848,000 12,910,000 11,167,000 9,770,000 8,345,000 10,221,000 8,925,000 7,438,000 6,606,000 9,742,000 9,150,000 7,788,000 7,309,000 7,992,000 6,826,000 6,218,000 5,556,000 6,568,000 6,036,000 5,643,000 5,161,000 6,164,000 5,566,000 4,978,000 4,879,000 5,307,000 4,564,000 4,084,000 
        unfunded pension obligation
                         5,218,000 5,522,000 5,826,000 4,384,000 5,148,000 5,279,000 5,278,000 5,082,000 5,085,000 5,172,000 5,259,000 4,919,000 10,006,000 10,583,000 10,664,000 10,058,000 10,298,000 10,368,000 10,423,000 10,518,000 11,567,000 11,597,000 11,627,000 12,336,000 12,343,000 12,423,000 12,503,000 4,354,000 4,521,000 4,763,000 5,027,000 11,636,000 12,263,000 12,762,000 13,184,000 15,186,000 15,877,000 15,866,000 15,786,000 9,574,000 9,774,000 9,681,000 9,473,000 9,464,000 9,202,000 11,996,000 8,678,000 10,096,000 11,145,000 11,327,000 11,303,000 3,122,000 3,035,000 2,949,000 2,787,000    3,982,000            
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,906,559 and 4,902,233 issued and outstanding, at june 30, 2021 and december 31, 2020, respectively
                         13,170,000                                                                      
        common shares issued to rabbi trust, 262,181 and 265,508 shares at june 30, 2021 and december 31, 2020, respectively
                         -10,850,000                                                                      
        treasury shares, at cost, 1,678,317 and 1,611,927 shares at june 30, 2021 and december 31, 2020, respectively
                         -93,292,000                                                                      
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,912,959 and 4,902,233 issued and outstanding, at march 31, 2021 and december 31, 2020, respectively
                          13,155,000                                                                     
        common shares issued to rabbi trust, 261,781 and 265,508 shares at march 31, 2021 and december 31, 2020, respectively
                          -10,820,000                                                                     
        treasury shares, at cost, 1,664,517 and 1,611,927 shares at march 31, 2021 and december 31, 2020, respectively
                          -92,246,000                                                                     
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,902,233 and 4,992,979 issued and outstanding, at december 31, 2020 and december 31, 2019, respectively
                           13,028,000                                                                    
        common shares issued to rabbi trust, 265,508 and 267,641 shares at december 31, 2020 and december 31, 2019, respectively
                           -10,940,000                                                                    
        treasury shares, at cost, 1,611,927 and 1,431,235 shares at
                                                                                               
        december 31, 2020 and december 31, 2019, respectively
                           -88,568,000                                                                    
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,914,543 and 4,992,979 issued and outstanding, at september 30, 2020 and december 31, 2019, respectively
                            13,013,000                                                                   
        common shares issued to rabbi trust, 265,508 and 267,641 shares at september 30, 2020 and december 31, 2019, respectively
                            -10,940,000                                                                   
        treasury shares, at cost, 1,592,027 and 1,431,235 shares at september 30, 2020 and december 31, 2019, respectively
                            -87,320,000                                                                   
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,934,506 and 4,992,979 issued and outstanding, at june 30, 2020 and december 31, 2019, respectively
                             13,003,000                                                                  
        common shares issued to rabbi trust, 264,886 and 267,641 shares at june 30, 2020 and december 31, 2019, respectively
                             -10,910,000                                                                  
        treasury shares, at cost, 1,567,692 and 1,431,235 shares at june 30, 2020 and december 31, 2019, respectively
                             -86,097,000                                                                  
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,995,114 and 4,992,979 issued and outstanding, at march 31, 2020 and december 31, 2019, respectively
                              13,003,000                                                                 
        common shares issued to rabbi trust, 264,283 and 267,641 shares at march 31, 2020 and december 31, 2019, respectively
                              -10,880,000                                                                 
        treasury shares, at cost, 1,506,481 and 1,431,235 shares at march 31, 2020 and december 31, 2019, respectively
                              -83,086,000                                                                 
        common shares - 2 par value per share, 15,000,000 shares authorized, 4,992,979 and 5,020,410 issued and outstanding, at december 31, 2019 and december 31, 2018, respectively
                               12,848,000                                                                
        common shares issued to rabbi trust, 267,641 and 269,630 shares at december 31, 2019 and december 31, 2018, respectively
                               -10,981,000                                                                
        treasury shares, at cost, 1,431,235 and 1,310,387 shares at
                                                                                               
        december 31, 2019 and december 31, 2018, respectively
                               -79,106,000                                                                
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,016,293 and 5,020,410 issued and outstanding, at september 30, 2019 and december 31, 2018, respectively
                                12,825,000                                                               
        common shares issued to rabbi trust, 267,641 and 269,630 shares at september 30, 2019 and december 31, 2018, respectively
                                -10,981,000                                                               
        treasury shares, at cost, 1,396,152 and 1,310,387 shares at september 30, 2019 and december 31, 2018, respectively
                                -76,781,000                                                               
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,030,181 and 5,020,410 issued and outstanding, at june 30, 2019 and december 31, 2018, respectively
                                 12,822,000                                                              
        common shares issued to rabbi trust, 270,860 and 269,630 shares at june 30, 2019 and december 31, 2018, respectively
                                 -11,066,000                                                              
        treasury shares, at cost, 1,381,002 and 1,310,387 shares at june 30, 2019 and december 31, 2018, respectively
                                 -76,030,000                                                              
        total preformed line products company shareholders’ equity
                                 257,852,000                                                              
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,059,380 and 5,020,410 issued and outstanding, at march 31, 2019 and december 31, 2018, respectively
                                  12,821,000                                                             
        common shares issued to rabbi trust, 270,335 and 269,630 shares at march 31, 2019 and december 31, 2018, respectively
                                  -11,038,000                                                             
        treasury shares, at cost, 1,351,278 and 1,310,387 shares at march 31, 2019 and december 31, 2018, respectively
                                  -74,574,000                                                             
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,020,410 and 5,038,207 issued and outstanding, at december 31, 2018 and december 31, 2017, respectively
                                   12,662,000                                                            
        common shares issued to rabbi trust, 269,630 and 289,026 shares at december 31, 2018 and december 31, 2017, respectively
                                   -11,008,000                                                            
        treasury shares, at cost, 1,310,387 and 1,258,069 shares at
                                                                                               
        december 31, 2018 and december 31, 2017, respectively
                                   -72,280,000                                                            
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,012,109 and 5,038,207 issued and outstanding, at september 30, 2018 and december 31, 2017, respectively
                                    12,643,000                                                           
        common shares issued to rabbi trust, 269,630 and 289,026 shares at september 30, 2018 and december 31, 2017, respectively
                                    -11,008,000                                                           
        treasury shares, at cost, 1,309,617 and 1,258,069 shares at september 30, 2018 and december 31, 2017, respectively
                                    -72,242,000                                                           
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,036,978 and 5,038,207 issued and outstanding, at june 30, 2018 and december 31, 2017, respectively
                                     12,639,000                                                          
        common shares issued to rabbi trust, 269,358 and 289,026 shares at june 30, 2018 and december 31, 2017, respectively
                                     -10,988,000                                                          
        treasury shares, at cost, 1,282,476 and 1,258,069 shares at june 30, 2018 and december 31, 2017, respectively
                                     -69,929,000                                                          
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,048,758 and 5,038,207 issued and outstanding, at march 31, 2018 and december 31, 2017, respectively
                                      12,635,000                                                         
        common shares issued to rabbi trust, 289,138 and 289,026 shares at march 31, 2018 and december 31, 2017, respectively
                                      -11,849,000                                                         
        treasury shares, at cost, 1,268,976 and 1,258,069 shares at march 31, 2018 and december 31, 2017, respectively
                                      -68,948,000                                                         
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,038,207 and 5,117,753 issued and outstanding, at december 31, 2017 and december 31, 2016, respectively
                                       12,593,000                                                        
        common shares issued to rabbi trust, 289,026 and 297,281 shares at december 31, 2017 and december 31, 2016, respectively
                                       -11,834,000                                                        
        treasury shares, at cost, 1,258,069 and 1,136,443 shares at
                                                                                               
        december 31, 2017 and december 31, 2016, respectively
                                       -68,115,000                                                        
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,091,381 and 5,117,753 issued and outstanding, at september 30, 2017 and december 31, 2016, respectively
                                        12,514,000                                                       
        common shares issued to rabbi trust, 298,160 and 297,281 shares at september 30, 2017 and december 31, 2016, respectively
                                        -12,109,000                                                       
        treasury shares, at cost, 1,165,736 and 1,136,443 shares at september 30, 2017 and december 31, 2016, respectively
                                        -61,129,000                                                       
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,115,981 and 5,117,753 issued and outstanding, at june 30, 2017 and december 31, 2016, respectively
                                         12,514,000                                                      
        common shares issued to rabbi trust, 297,840 and 297,281 shares at june 30, 2017 and december 31, 2016, respectively
                                         -12,089,000                                                      
        treasury shares, at cost, 1,140,816 and 1,136,443 shares at june 30, 2017 and december 31, 2016, respectively
                                         -59,880,000                                                      
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,118,088 and 5,117,753 issued and outstanding, at march 31, 2017 and december 31, 2016, respectively
                                          12,513,000                                                     
        common shares issued to rabbi trust, 297,408 and 297,281 shares at march 31, 2017 and december 31, 2016, respectively
                                          -12,069,000                                                     
        treasury shares, at cost, 1,138,277 and 1,136,443 shares at march 31, 2017 and december 31, 2016, respectively
                                          -59,747,000                                                     
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,117,753 and 5,221,062 issued and outstanding, at december 31, 2016 and december 31, 2015, respectively
                                           12,508,000                                                    
        common shares issued to rabbi trust, 297,281 and 296,635 shares at december 31, 2016 and december 31, 2015, respectively
                                           -12,054,000                                                    
        treasury shares, at cost, 1,136,443 and 1,018,013 shares at
                                                                                               
        december 31, 2016 and december 31, 2015, respectively
                                           -59,640,000                                                    
        patents and other intangibles - net
                                            11,245,000 11,400,000 11,465,000 11,288,000 11,323,000 12,484,000 13,016,000 14,121,000 15,009,000 16,494,000 16,549,000 11,787,000     14,265,000 14,309,000   11,654,000                           3,247,000 3,340,000   
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,125,849 and 5,221,062 issued and outstanding, at september 30, 2016 and december 31, 2015, respectively
                                            12,498,000                                                   
        common shares issued to rabbi trust, 297,281 and 296,635 shares at september 30, 2016 and december 31, 2015, respectively
                                            -12,054,000                                                   
        treasury shares, at cost, 1,122,290 and 1,018,013 shares at september 30, 2016 and december 31, 2015, respectively
                                            -58,974,000                                                   
        accrued profit -sharing and other benefits
                                             4,028,000                                                  
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,170,214 and 5,221,062 issued and outstanding, at june 30, 2016 and december 31, 2015, respectively
                                             12,484,000                                                  
        common shares issued to rabbi trust, 296,817 and 296,635 shares at june 30, 2016 and december 31, 2015, respectively
                                             -12,034,000                                                  
        treasury shares, at cost, 1,071,589 and 1,018,013 shares at june 30, 2016 and december 31, 2015, respectively
                                             -56,635,000                                                  
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,204,950 and 5,221,062 issued and outstanding, at march 31, 2016 and december 31, 2015
                                              12,483,000                                                 
        common shares issued to rabbi trust, 296,326 and 296,635 shares at march 31, 2016 and december 31, 2015
                                              -12,014,000                                                 
        treasury shares, at cost, 1,036,362 and 1,018,013 shares at march 31, 2016 and december 31, 2015
                                              -55,230,000                                                 
        income taxes payable and deferred income taxes
                                               1,646,000 839,000 737,000 1,305,000 1,802,000 2,155,000 1,544,000 1,501,000 1,076,000 1,099,000 912,000 3,617,000 6,328,000 3,609,000 4,024,000 2,810,000 3,809,000 5,430,000 5,099,000 4,254,000 2,548,000 3,949,000 1,522,000 670,000 1,379,000                        
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,221,062 and 5,397,138 issued and outstanding, at december 31, 2015 and december 31, 2014
                                               12,478,000                                                
        common shares issued to rabbi trust, 296,635 and 292,609 shares at december 31, 2015 and december 31, 2014, respectively
                                               -12,052,000                                                
        treasury shares, at cost, 1,018,013 and 819,424 shares at december 31, 2015 and december 31, 2014
                                               -54,570,000                                                
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,296,036 and 5,397,138 issued and outstanding, net of 922,425 and 819,424 treasury shares at par, respectively, at september 30, 2015 and december 31, 2014
                                                10,592,000                                               
        common shares issued to rabbi trust, 291,021 and 292,609 shares at september 30, 2015 and december 31, 2014
                                                -11,657,000                                               
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,391,671 and 5,397,138 issued and outstanding, net of 827,211 and 819,424 treasury shares at par, respectively, at june 30, 2015 and december 31, 2014
                                                 10,781,000                                              
        common shares issued to rabbi trust, 290,470 and 292,609 shares at june 30, 2015 and december 31, 2014
                                                 -11,637,000                                              
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,393,371 and 5,397,138 issued and outstanding, net of 824,011 and 819,424 treasury shares at par, respectively, at march 31, 2015 and december 31, 2014
                                                  10,787,000                                             
        common shares issued to rabbi trust, 289,942 and 292,609 shares at march 31, 2015 and december 31, 2014
                                                  -11,617,000                                             
        plpc shareholders’ equity:
                                                                                               
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,397,138 and 5,391,074 issued and outstanding, net of 819,424 and 779,279 treasury shares at par, respectively, at december 31, 2014 and december 31, 2013
                                                   10,794,000                                            
        common shares issued to rabbi trust, 292,609 and 253,156 shares at december 31, 2014 and december 31, 2013
                                                   -11,790,000                                            
        income taxes payable, noncurrent
                                                    1,549,000 1,541,000 1,610,000  1,585,000 2,355,000 2,420,000  2,246,000 1,939,000 1,905,000 1,835,000 1,819,000 1,836,000 1,772,000 1,768,000 1,672,000 1,722,000  1,898,000 746,000 1,536,000 1,474,000 1,405,000 1,270,000 1,974,000 1,905,000 1,837,000                
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,354,460 and 5,391,074 issued and outstanding, net of 819,424 and 779,279 treasury shares at par, respectively, at september 30, 2014 and december 31, 2013
                                                    10,709,000                                           
        common shares issued to rabbi trust, 249,931 and 253,156 shares at september 30, 2014 and december 31, 2013
                                                    -9,196,000                                           
        thousands of dollars, except share and per share data
                                                                                               
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,389,992 and 5,391,074 issued and outstanding, net of 783,418 and 779,279 treasury shares at par, respectively, at june 30, 2014 and december 31, 2013
                                                     10,778,000                                          
        common shares issued to rabbi trust, 249,557 and 253,156 shares at june 30, 2014 and december 31, 2013
                                                     -9,176,000                                          
        paid in capital
                                                     22,007,000 21,955,000 21,082,000 19,828,000 18,672,000 16,797,000 16,355,000 15,314,000 14,190,000 13,239,000 12,718,000 12,092,000 11,307,000 9,514,000 8,748,000 7,774,000 7,301,000 6,448,000 5,885,000 5,369,000 4,610,000 4,095,000 3,704,000 3,402,000 3,012,000 2,822,000 2,720,000 2,429,000 2,370,000 1,629,000 1,562,000 1,515,000 1,448,000 1,319,000 1,237,000 1,146,000 1,026,000 928,000 545,000 509,000 82,000 82,000 
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,388,733 and 5,391,074 issued and outstanding, net of 783,418 and 779,279 treasury shares at par, respectively, at march 31, 2014 and december 31, 2013
                                                      10,777,000                                         
        common shares issued to rabbi trust, 249,198 and 253,156 shares at march 31, 2014 and december 31, 2013
                                                      -9,156,000                                         
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,391,074 and 5,377,937 issued and outstanding, net of 779,279 and 689,472 treasury shares at par, respectively, at december 31, 2013 and december 31, 2012
                                                       10,782,000                                        
        common shares issued to rabbi trust, 253,156 and 184,036 shares at december 31, 2013 and december 31, 2012
                                                       -9,306,000                                        
        inventories—net
                                                        73,930,000 78,692,000 86,308,000 86,916,000   91,862,000 88,613,000                                
        property, plant and equipment—net
                                                        98,453,000 95,718,000 96,943,000 93,326,000   93,102,000                                 
        patents and other intangibles—net
                                                        12,365,000 12,447,000 13,710,000 14,038,000   15,129,000 11,352,000                                
        common shares—2 par value per share, 15,000,000 shares authorized, 5,361,155 and 5,377,937 issued and outstanding, net of 732,579 and 689,472 treasury shares at par, respectively, at september 30, 2013 and december 31, 2012
                                                        10,722,000                                       
        common shares issued to rabbi trust, 184,787 and 184,036 shares at september 30, 2013 and december 31, 2012
                                                        -6,577,000                                       
        common shares—2 par value per share, 15,000,000 shares authorized, 5,360,879 and
                                                                                               
        5,377,937 issued and outstanding, net of 727,579 and 689,472 treasury shares at par, respectively, at june 30, 2013 and december 31, 2012
                                                         10,722,000                                      
        common shares issued to rabbi trust, 184,511 and 184,036 shares at june 30, 2013 and december 31, 2012
                                                         -6,557,000                                      
        common shares—2 par value per share, 15,000,000 shares authorized, 5,376,254 and 5,377,937 issued and outstanding, net of 691,472 and 689,472 treasury shares at par, respectively, at march 31, 2013 and december 31, 2012
                                                          10,753,000                                     
        common shares issued to rabbi trust, 183,929 and 184,036 shares at march 31, 2013 and december 31, 2012
                                                          -6,517,000                                     
        common shares—2 par value per share, 15,000,000 shares authorized, 5,377,937 and 5,333,630 issued and outstanding, net of 689,472 and 639,138 treasury shares at par, respectively, at december 31, 2012 and december 31, 2011
                                                           10,756,000                                    
        common shares issued to rabbi trust, 184,036 and 109,040 shares at december 31, 2012 and december 31, 2011
                                                           -6,522,000                                    
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,307,589 and 5,333,630 issued and outstanding, net of 676,898 and 639,138 treasury shares at par, respectively, at september 30, 2012 and december 31, 2011
                                                            10,615,000                                   
        common shares issued to rabbi trust
                                                            -3,867,000 -3,847,000 -3,807,000 -3,812,000 -1,280,000 -1,260,000 -1,220,000 -1,200,000                            
        common shares - 2 par value per share, 15,000,000 shares authorized, 5,333,018 and 5,333,630 issued and outstanding, net of 642,388 and 639,138 treasury shares at par, respectively, at june 30, 2012 and december 31, 2011
                                                             10,666,000                                  
        common shares—2 par value per share, 15,000,000 shares authorized, 5,332,454 and 5,333,630 issued and outstanding, net of 640,638 and 639,138 treasury shares at par, respectively, at march 31, 2012 and december 31, 2011
                                                              10,665,000                                 
        property,plant and equipment—net
                                                               82,860,000                                
        common shares—2 par value per share, 15,000,000 shares authorized, 5,333,630 and 5,270,977 issued and outstanding, net of 639,138 and 586,746 treasury shares at par, respectively, at december 31, 2011 and december 31, 2010
                                                               10,667,000                                
        total plpc shareholders’ equity
                                                               212,858,000 209,809,000 214,394,000 205,350,000 196,140,000 189,305,000 173,265,000 171,595,000 170,966,000 158,374,000 147,601,000 135,042,000                     
        property and equipment - net
                                                                78,855,000                           48,169,000 46,286,000   
        common stock - 2 par value per share, 15,000,000 shares authorized, 5,248,396 and 5,270,977 issued and outstanding, net of 639,138 and 586,746 treasury shares at par, respectively
                                                                10,497,000                               
        inventories — net
                                                                 82,280,000 81,114,000 73,121,000 67,869,000 57,131,000 58,293,000 56,036,000 48,439,000 49,149,000 45,910,000 48,412,000 47,020,000 44,823,000 51,294,000 47,563,000 53,435,000 47,948,000 44,183,000 40,415,000 39,316,000 38,655,000 37,878,000 37,618,000 35,904,000     31,598,000 33,134,000 
        property and equipment — net
                                                                 80,571,000 77,987,000 76,266,000 73,228,000 68,304,000 69,592,000 67,766,000 61,124,000 58,769,000 55,009,000 55,940,000 60,934,000 63,143,000 65,547,000 62,901,000 60,451,000 55,421,000 54,016,000 52,810,000 52,567,000 52,432,000 49,928,000 48,804,000 48,252,000     48,061,000 48,745,000 
        patents and other intangibles — net
                                                                 12,545,000 12,407,000  12,848,000 7,501,000 7,988,000 8,087,000 3,505,000 3,538,000 3,575,000 3,858,000 4,287,000 5,722,000 5,734,000 5,637,000 2,716,000 2,385,000 2,465,000 2,546,000 2,628,000 2,709,000 2,789,000 2,871,000 2,965,000       
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,258,210 and 5,270,977 issued and outstanding, net of 623,138 and 586,746 treasury shares at par, respectively
                                                                 10,516,000                              
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,272,804 and 5,270,977 issued and outstanding, net of 586,746 and 586,746 treasury shares at par, respectively
                                                                  10,546,000                             
        other intangibles — net
                                                                   12,735,000                            
        common shares — 2 par value per share, 15,000,000 shares authorized, 5,270,977 and 5,248,298 issued and outstanding, net of 586,746 and 554,059 treasury shares at par, respectively
                                                                   10,542,000                            
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,220,847 and 5,248,298 issued and outstanding, net of 587,286 and 551,059 treasury shares at par, respectively
                                                                    10,442,000                           
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,253,306 and 5,248,298 issued and outstanding, net of 553,747 and 554,059 treasury shares at par, respectively
                                                                     10,507,000                          
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,253,140 and 5,248,298 issued and outstanding, net of 554,205 and 554,059 treasury shares at par, respectively
                                                                      10,506,000                         
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,248,298 and 5,223,830 issued and outstanding, net of 554,059 and 551,059 treasury shares at par, respectively
                                                                       10,497,000                        
        prepaids and other
                                                                        5,242,000 4,982,000 4,031,000 4,704,000 5,811,000 6,097,000 4,279,000 4,542,000 4,677,000 4,132,000 4,760,000 2,504,000 3,153,000 3,094,000 3,421,000 2,832,000 2,175,000 3,314,000 2,208,000 2,651,000 2,340,000 4,223,000 4,857,000 
        income taxes and deferred taxes payable
                                                                        1,394,000                       
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,234,039 and 5,223,830 issued and outstanding, net of 554,059 and 551,059 treasury shares at par, respectively
                                                                        10,468,000                       
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,236,839 and 5,223,830 issued and outstanding, net of 551,059 treasury shares at par, respectively
                                                                         10,474,000                      
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,225,630 and 5,223,830 issued and outstanding, net of 551,059 treasury shares at par, respectively
                                                                          10,451,000                     
        current assets of discontinued operations
                                                                                               
        current liabilities of discontinued operations
                                                                                               
        minority interests
                                                                           736,000 1,381,000 1,255,000 937,000 904,000                
        common stock — 2 par value per share, 15,000,000 shares authorized, 5,223,830 and 5,380,956 issued and outstanding, net of 551,059 and 378,333 treasury shares at par, respectively
                                                                           10,448,000                    
        common stock — 2 par value, 15,000,000 shares authorized, 5,223,180 and 5,380,956 issued and outstanding, net of 551,059 and 378,333 treasury shares at par, respectively
                                                                            10,446,000                   
        common stock — 2 par value, 15,000,000 shares authorized, 5,214,830 and 5,380,956 issued and outstanding, net of 551,059 and 378,333 treasury shares at par, respectively
                                                                             10,430,000                  
        accumulated other comprehensive income
                                                                             1,012,000                  
        common stock — 2 par value, 15,000,000 shares authorized, 5,379,856 and 5,380,956 issued and outstanding, net of 381,733 and 378,333 treasury shares at par, respectively
                                                                              10,760,000                 
        common stock — 2 par value, 15,000,000 shares authorized, 5,380,956 and 5,360,259 issued and outstanding, net of 378,333 and 365,311 treasury shares at par, respectively
                                                                               10,762,000                
        goodwill — net
                                                                                6,128,000 4,876,000 4,793,000 2,166,000 2,073,000 2,027,000 1,995,000 2,018,000 2,083,000       
        income taxes
                                                                                1,724,000 1,151,000 1,041,000 1,129,000 2,849,000 1,226,000 954,000 881,000 2,221,000 849,000 952,000 777,000 3,211,000 2,365,000 2,406,000 
        unfunded pension liabilities
                                                                                4,465,000 4,325,000 4,185,000             
        unrecognized tax benefits
                                                                                1,896,000 2,231,000 1,875,000             
        other non-current liabilities
                                                                                1,026,000 375,000 375,000             
        minority interest
                                                                                961,000               
        common shares — 2 par value, 15,000,000 shares authorized, 5,378,456 and 5,360,259 issued and outstanding, net of 373,333 and 365,311 treasury shares at par, respectively
                                                                                10,757,000 10,757,000              
        common shares — 2 par value, 15,000,000 shares authorized, 5,358,437 and 5,360,259 issues and outstanding, net of 367,333 and 365,311 treasury shares at par, respectively
                                                                                  10,717,000             
        common stock — 2 par value, 15,000,000 shares authorized, 5,360,259 and 5,734,797 issued and outstanding, net of 365,311 and 511,159 treasury shares at par, respectively
                                                                                   10,721,000            
        accrued profit-sharing and pension contributions
                                                                                    4,385,000 3,704,000 4,773,000 4,290,000 3,549,000 2,741,000 3,971,000 3,639,000 3,585,000 3,668,000 3,723,000 
        common shares — 2 par value, 15,000,000 shares authorized, 5,360,259 and 5,734,797 outstanding, net of 365,311 and 511,159 treasury shares at par, respectively
                                                                                    10,721,000           
        common shares — 2 par value, 15,000,000 shares authorized, 5,724,570 and 5,734,797 outstanding, net of 0 and 511,159 treasury shares at par, respectively
                                                                                     11,449,000          
        common shares — 2 par value, 15,000,000 shares authorized, 5,717,552 and 5,734,797 outstanding, net of 529,050 and 511,159 treasury shares at par, respectively
                                                                                      11,435,000         
        common stock — 2 par value, 15,000,000 shares authorized, 5,734,797 and 5,706,713 issued and outstanding, net of 511,159 and 491,159 treasury shares at par, respectively
                                                                                       11,470,000        
        accounts receivables
                                                                                        35,667,000 32,449,000 31,212,000 29,217,000 32,212,000 27,185,000 26,659,000 
        common shares — 2 par value, 15,000,000 shares authorized, 5,728,697 and 5,706,713 outstanding, net of 511,159 and 491,159 treasury shares at par, respectively
                                                                                        11,457,000       
        property and equipment – net
                                                                                         47,697,000 47,641,000     
        goodwill – net
                                                                                         2,076,000 2,113,000     
        patents and other intangibles – net
                                                                                         3,058,000 3,152,000     
        common shares – 2 par value, 15,000,000 shares authorized, 5,721,597 and 5,706,713 outstanding, net of 511,159 and 491,159 treasury shares at par, respectively
                                                                                         11,443,000      
        common shares – 2 par value, 15,000,000 shares authorized, 5,729,097 and 5,706,713 outstanding, net of 496,159 and 491,159 treasury shares at par, respectively
                                                                                          11,458,000     
        investments in foreign joint ventures
                                                                                             8,302,000 8,842,000 
        goodwill - net
                                                                                           2,130,000 2,037,000   
        common stock - 2 par value, 15,000,000 shares authorized, 5,706,713 and 5,814,269 issued and outstanding, net of 491,159 and 377,404 treasury shares at par, respectively
                                                                                           11,413,000    
        investments in foreign joint venture
                                                                                               
        other
                                                                                            2,371,000 3,404,000 3,365,000 
        deferred income taxes - long-term
                                                                                            222,000   
        minimum pension liability
                                                                                               
        common shares - 2 par value, 15,000,000 shares authorized, 5,717,433 and 5,814,269 outstanding, net of 477,404 and 377,404 treasury shares at par
                                                                                            11,435,000   
        deferred income taxes — short-term
                                                                                             3,436,000 4,864,000 
        deferred income taxes — long-term
                                                                                             644,000 790,000 
        goodwill, patents and other intangibles — net
                                                                                             5,511,000 5,583,000 
        minimum pension liability and other
                                                                                             854,000 854,000 
        common shares — 2 par value, 15,000,000 shares authorized, 5,784,494 and 5,772,710 issued and outstanding, net of 377,404 and 389,188 treasury shares at par
                                                                                             11,569,000 11,569,000 
        other comprehensive loss
                                                                                             -15,563,000 -16,307,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-09-30 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-09-30 2007-06-30 2007-03-31 2006-09-30 2006-06-30 2006-03-31 2005-09-30 2005-06-30 2005-03-31 2004-09-30 2003-09-30 
                                                                                     
          operating activities
                                                                                     
          net income
        10,549,000 8,435,000 2,619,000 12,700,000 11,553,000 10,445,000 7,696,000 9,367,000 9,603,000 6,309,000 15,145,000 20,464,000 21,419,000 16,488,000 11,889,000 13,721,000 12,301,000 8,951,000 10,702,000 8,891,000 7,177,000 2,658,000 12,962,000 10,488,000 3,653,000 5,603,000 8,043,000 7,866,000 1,824,000 5,263,000 9,055,000 6,735,000 5,528,000 702,000 6,278,000 4,156,000 1,518,000 5,101,000 4,741,000 2,755,000 2,658,000 3,045,000 206,000 3,680,000 -256,000 2,488,000 7,818,000 2,738,000 17,455,000 11,351,000 4,965,000 24,013,000 14,729,000 8,133,000 22,044,000 15,384,000 6,854,000 17,012,000 7,130,000 1,132,000 12,518,000 6,259,000 2,717,000 14,862,000 8,439,000 2,950,000 13,198,000 7,534,000 3,718,000 10,028,000 6,029,000 2,484,000 11,103,000 6,924,000 3,228,000 9,231,000 -510,000 
          adjustments to reconcile net income to net cash from operations:
                                                                                     
          depreciation and amortization
        6,166,000 6,141,000 5,806,000 5,686,000 5,397,000 4,848,000 5,322,000 5,246,000 5,414,000 5,312,000 4,638,000 4,689,000 4,275,000 6,242,000 3,314,000 3,853,000 3,021,000 5,009,000 3,723,000 3,687,000 3,145,000 3,758,000 3,419,000 3,304,000 3,357,000 3,904,000 3,305,000 3,399,000 3,140,000 3,149,000 2,771,000 3,259,000 3,265,000 3,682,000 3,235,000 2,901,000 2,972,000 3,394,000 3,000,000 2,892,000 2,710,000 2,438,000 2,898,000 2,946,000 3,250,000 3,273,000 6,296,000 3,078,000 8,987,000 6,084,000 2,961,000 8,233,000 5,423,000 2,684,000 7,664,000 5,076,000 2,521,000 6,483,000 4,042,000 2,057,000 5,162,000 3,404,000 1,704,000 6,054,000 3,983,000 2,151,000 5,642,000 3,746,000 1,816,000 5,162,000 3,384,000 1,669,000 5,192,000 3,417,000 1,706,000 5,420,000 1,916,000 
          deferred income taxes
        403,000 -2,441,000 2,071,000 -327,000 -479,000 4,096,000 -1,099,000 -1,527,000 -386,000 605,000 -826,000 -481,000 -1,530,000 -1,507,000 1,442,000 -2,028,000 -563,000 5,857,000 -888,000 -3,346,000 4,921,000 -4,444,000 387,000 -486,000 1,163,000 229,000 -791,000 -808,000 96,000 794,000 -18,000 -308,000 -154,000 2,579,000 647,000 -501,000 -289,000 3,393,000 -329,000 -792,000 -23,000 975,000 -810,000 108,000 -1,217,000 -1,330,000 443,000 313,000 -1,693,000 -480,000 -321,000 -59,000 -642,000 1,550,000 -2,157,000 -690,000 -517,000 -66,000 -1,164,000 -334,000 1,683,000 95,000 392,000 -1,044,000 -330,000 99,000 231,000 341,000 558,000 -671,000 -197,000 -139,000 -709,000 239,000 81,000 936,000 1,482,000 
          share-based compensation expense
        2,345,000 982,000 1,375,000 1,706,000 892,000 1,463,000 632,000 934,000 383,000 858,000 1,299,000 1,725,000 1,066,000 1,187,000 1,496,000 890,000 1,023,000 872,000 1,364,000 893,000 1,034,000 1,043,000 1,458,000 612,000 976,000 1,052,000 1,388,000 1,028,000 928,000 1,935,000 584,000 986,000 731,000 868,000 1,047,000 579,000 561,000 439,000 421,000 143,000 363,000 794,000 -982,000 -53,000 489,000 754,000 645,000 612,000 2,199,000 1,310,000 423,000 2,179,000 1,334,000 498,000 2,178,000 1,458,000 645,000 2,161,000 1,383,000 606,000 1,425,000 669,000 362,000               
          loss on sale of property and equipment
        27,000 -16,000      -9,000 -1,843,000  -2,501,000 28,000 16,000        -16,000         -9,000    138,000            -1,000 80,000  -57,000 18,000   -135,000                       -279,000  
          other
        356,000 -2,653,000 2,023,000 1,271,000 -228,000 -171,000 532,000 -763,000 1,230,000 -5,783,000 2,122,000 2,154,000 1,942,000 -100,000 -467,000                                                               
          changes in operating assets and liabilities
        -13,799,000   5,873,000 -11,443,000  -3,630,000 15,046,000 -8,648,000      -8,744,000 -17,624,000 -17,420,000                                                             
          net cash from operating activities
        6,047,000 21,944,000 18,940,000 26,928,000 5,655,000 24,067,000 9,366,000 28,294,000 5,753,000 19,288,000 42,504,000 20,420,000 25,430,000 17,031,000 15,299,000 -1,002,000 -5,175,000 9,512,000 10,025,000 825,000 13,236,000 8,085,000 24,373,000 12,239,000 -3,055,000 6,548,000 14,834,000 5,334,000 501,000 15,889,000 -592,000 8,706,000 -1,027,000 12,117,000 19,694,000 3,588,000 -1,569,000 4,938,000 11,000,000 8,842,000 1,194,000 12,357,000 216,000 7,054,000 602,000 4,172,000 10,483,000 -1,239,000 14,537,000 12,406,000 -1,396,000 35,307,000 22,447,000 8,194,000 14,845,000 2,134,000 -2,942,000 17,535,000 6,712,000 787,000 22,061,000 11,214,000 3,621,000 14,087,000 6,157,000 4,128,000 8,071,000 3,214,000 -2,773,000 7,884,000 2,001,000 -3,110,000 13,756,000 7,390,000 4,507,000 10,054,000  
          investing activities
                                                                                     
          capital expenditures
        -9,993,000 -10,155,000 -10,623,000 -8,378,000 -10,976,000 -3,431,000 -3,574,000 -3,728,000 -3,918,000 -8,214,000 -9,941,000 -8,826,000 -8,351,000 -15,423,000 -11,366,000 -5,799,000 -8,010,000 -5,779,000 -5,267,000 -3,869,000 -3,469,000 -350,000 -12,399,000 -5,823,000 -5,997,000 -7,517,000 -9,967,000 -9,587,000 -2,396,000 -2,236,000 -1,719,000 -2,874,000 -2,699,000 -3,401,000 -3,278,000 -2,337,000 -2,217,000 -3,028,000 -2,020,000 -14,169,000 -5,508,000 -4,045,000 -2,069,000 -2,368,000 -2,272,000 -3,178,000 -11,471,000 -6,504,000 -15,861,000 -10,789,000 -5,883,000 -15,540,000 -12,893,000 -9,442,000 -12,503,000 -6,504,000 -2,358,000 -9,088,000 -6,606,000 -3,774,000 -6,699,000 -4,198,000 -2,200,000 -9,002,000 -6,256,000 -3,708,000 -6,958,000 -4,360,000 -2,054,000 -8,463,000 -6,940,000 -2,899,000 -4,923,000 -2,924,000 -1,364,000 -3,823,000  
          free cash flows
        -3,946,000 11,789,000 8,317,000 18,550,000 -5,321,000 20,636,000 5,792,000 24,566,000 1,835,000 11,074,000 32,563,000 11,594,000 17,079,000 1,608,000 3,933,000 -6,801,000 -13,185,000 3,733,000 4,758,000 -3,044,000 9,767,000 7,735,000 11,974,000 6,416,000 -9,052,000 -969,000 4,867,000 -4,253,000 -1,895,000 13,653,000 -2,311,000 5,832,000 -3,726,000 8,716,000 16,416,000 1,251,000 -3,786,000 1,910,000 8,980,000 -5,327,000 -4,314,000 8,312,000 -1,853,000 4,686,000 -1,670,000 994,000 -988,000 -7,743,000 -1,324,000 1,617,000 -7,279,000 19,767,000 9,554,000 -1,248,000 2,342,000 -4,370,000 -5,300,000 8,447,000 106,000 -2,987,000 15,362,000 7,016,000 1,421,000 5,085,000 -99,000 420,000 1,113,000 -1,146,000 -4,827,000 -579,000 -4,939,000 -6,009,000 8,833,000 4,466,000 3,143,000 6,231,000  
          proceeds from the sale of property and equipment
        49,000 -51,000 227,000 6,000 91,000 -39,000 128,000 128,000 3,237,000 125,000 2,377,000 5,000 124,000 12,000 3,157,000 109,000 9,000 19,000 4,000     6,000    192,000   90,000 51,000 -16,000 17,000 9,000 61,000 12,000 391,000 -44,000 570,000 19,000 98,000 20,000 455,000 47,000 36,000 1,910,000 1,902,000 3,000 228,000 168,000 113,000 661,000 225,000 100,000 168,000 89,000 25,000 201,000 185,000 70,000 152,000 93,000 22,000 378,000 291,000 15,000 121,000 101,000 23,000 380,000 10,000 
          proceeds from sale of investments
         1,679,000                                                                         
          purchases of investments
         -451,000                                                                         
          net cash from investing activities
        -9,944,000 -10,206,000 -10,962,000 -12,552,000 -9,657,000 -4,631,000 -3,446,000 -3,600,000 -681,000 -8,089,000 -7,564,000 -6,842,000 -22,295,000 -18,656,000 -11,366,000 -5,799,000 -10,934,000 -5,670,000 -5,258,000 -3,850,000 -3,465,000 10,175,000 -12,399,000 -5,823,000 -5,997,000 -7,511,000 -9,839,000 -18,388,000 -13,065,000 -2,044,000 -1,719,000 -3,253,000 -7,007,000 -1,932,000 -2,338,000 2,019,000 351,000 -5,519,000 -2,020,000 -18,699,000 -2,231,000 -2,651,000 -2,902,000 -5,884,000 575,000 -3,142,000 -26,936,000 -20,407,000 -15,406,000 -10,742,000 -5,847,000 -18,803,000 -16,164,000 -15,615,000 -12,605,000 -6,666,000 -2,443,000 -22,770,000 -6,381,000 -3,674,000 -6,214,000 -3,792,000 -1,425,000 1,041,000 5,475,000 -3,638,000 -15,249,000 -6,817,000 -4,582,000 -8,085,000 -6,649,000 -2,884,000 -4,802,000 -2,823,000 -1,341,000 -2,024,000  
          financing activities
                                                                                     
          proceeds of notes payable to banks
        186,000 -1,654,000 -1,589,000   -54,000 751,000   -4,289,000 -2,549,000                                                                   
          proceeds from long-term debt
        5,003,000 3,172,000 8,198,000 2,209,000 8,628,000 2,387,000 40,924,000 19,867,000 33,232,000 37,456,000 27,533,000 53,794,000 50,389,000 58,052,000 43,612,000 33,394,000 49,958,000 29,944,000 26,021,000 27,712,000 15,242,000 22,058,000 27,626,000 16,218,000 24,945,000 22,306,000 15,094,000 22,504,000 33,132,000 18,542,000                                                
          payments of long-term debt
        -1,612,000 -1,171,000 -3,900,000 -786,000 -777,000 -8,058,000 -45,856,000 -43,150,000 -33,069,000 -35,214,000 -50,682,000 -49,650,000 -50,633,000 -47,059,000 -43,930,000 -35,446,000 -29,494,000 -31,907,000 -28,601,000 -25,923,000 -27,106,000 -37,390,000 -35,976,000 -19,065,000 -17,652,000 -22,546,000 -15,997,000 -8,227,000 -17,354,000 -26,201,000 -26,865,000 -21,318,000 -11,112,000 -15,229,000 -17,281,000 -18,316,000 -13,155,000 -15,092,000 -13,788,000 -17,188,000 -11,674,000 -11,907,000 -12,425,000 -13,740,000 -13,868,000 -15,707,000 -24,482,000 -10,725,000 -43,631,000 -30,417,000 -11,847,000 -65,254,000 -306,000 -158,000 -1,131,000 -924,000 -199,000 -2,324,000 -11,471,000 -935,000 -375,000 -250,000 -135,000 -7,810,000 -4,330,000 -583,000 -1,309,000 -1,132,000 -550,000 -2,875,000 -2,711,000 -2,160,000 -526,000 -394,000 -193,000 -388,000  
          dividends paid
        -1,116,000 -981,000 -985,000 -988,000 -1,164,000 -979,000 -983,000 -984,000 -1,130,000 -980,000 -983,000 -989,000 -1,154,000 -1,014,000 -1,024,000 -1,030,000 -1,031,000 -1,034,000 -980,000 -983,000 -1,131,000 -996,000 -1,015,000 -998,000 -1,175,000 -1,004,000 -1,006,000 -1,177,000 -1,043,000 -967,000 -1,056,000 -1,057,000 -1,008,000 -950,000 -1,057,000 -1,055,000 -1,037,000 -1,039,000 -1,029,000 -1,046,000 -1,056,000 -1,215,000 -845,000 -1,221,000 -1,110,000 -1,100,000 -2,205,000 -1,107,000 -1,201,000 -98,000  -3,305,000 -2,200,000 -1,095,000 -3,286,000 -2,189,000 -1,087,000 -3,259,000 -2,167,000 -1,092,000 -3,198,000 -2,125,000 -1,054,000   -1,076,000 -3,219,000 -2,143,000 -1,072,000 -3,435,000 -2,290,000 -1,147,000 -3,431,000 -2,287,000 -1,141,000 -3,450,000 -1,157,000 
          proceeds from issuance of common shares
        450,000 1,528,000 237,000 92,000 68,000 54,000 99,000 1,000 60,000 144,000 1,356,000 309,000 355,000 328,000 363,000 1,000 116,000 15,000 30,000   78,000 -92,000 30,000 236,000 184,000    -924,000 894,000       -130,000 268,000   20,000 20,000 40,000 -1,000 125,000 105,000 1,167,000 895,000 20,000 324,000 145,000 24,000 1,023,000 958,000 79,000 89,000 84,000 77,000 191,000 188,000 33,000 442,000 201,000             
          stock incentive plan payments
        -3,935,000 -905,000 -3,799,000                                                                         
          purchase of common shares for treasury
        -652,000 -660,000 -258,000 -131,000 -113,000   -612,000 -116,000 -92,000 -66,000 -1,000   -4,000 -1,219,000 -3,011,000 -1,602,000 -403,000 -702,000 -1,456,000 -239,000 -36,000 -45,000 -110,000 236,000   -193,000 -883,000 -1,405,000 -627,000 -3,625,000 -2,174,000 -130,000 -74,000   -3,248,000 -2,892,000 -134,000 -2,094,000 -195,000 -93,000 -3,522,000 -2,518,000  -1,081,000 -21,000 -23,000 -165,000 -57,000 -24,000 -7,458,000 -7,457,000 -151,000 -328,000 -328,000 -68,000 -12,141,000 -641,000 -641,000 -702,000 -702,000 -148,000   
          purchase of common shares for treasury from related parties
        -8,286,000 -1,218,000 -4,255,000 -2,351,000 -881,000 -238,000 -2,233,000 -456,000 -5,452,000 -493,000 -7,947,000 -6,100,000 -3,624,000 -1,440,000 -2,140,000 -1,729,000 -1,000 -543,000 -870,000 -3,678,000 -1,248,000 -2,378,000 -1,922,000 -49,000 -2,055,000 -3,000 -2,266,000 -982,000 -723,000 -6,987,000 -1,486,000 105,000 -107,000 -474,000 -1,455,000 -33,000 -335,000 -1,075,000 -140,000 -261,000 -261,000                              
          net cash from financing activities
        -9,962,000 -1,889,000 -2,552,000 -4,768,000 -22,000 -7,001,000 -7,298,000 -21,838,000 -11,666,000 -3,376,000 -33,884,000 -2,355,000 -9,307,000 7,897,000 -883,000 431,000 15,098,000 -4,118,000 -380,000 1,752,000 -20,484,000 -16,679,000 -7,182,000 -5,015,000 5,711,000 -2,262,000 -4,687,000 13,529,000 11,134,000 -4,274,000 -6,046,000 -7,017,000 8,286,000 -3,891,000 -6,897,000 -9,232,000 469,000 -2,144,000 -4,025,000 7,899,000 2,659,000 -5,804,000 -4,156,000 -688,000 -2,009,000 -771,000 18,267,000 19,418,000 2,357,000 530,000 6,336,000 -20,647,000 -7,806,000 3,841,000 -433,000 5,507,000 6,687,000 3,797,000 -1,632,000 3,891,000 -2,158,000 -645,000 -814,000 -12,247,000 -11,109,000 -1,997,000 -2,976,000 -3,089,000 -1,227,000 -13,923,000 -1,037,000 -1,404,000 -2,847,000 -2,080,000 -932,000 -6,325,000  
          effects of exchange rate changes on cash, cash equivalents and restricted cash
        -78,000 594,000 612,000 2,465,000 1,615,000 -2,689,000 1,452,000 -1,291,000 -1,154,000 2,048,000 -480,000 146,000 724,000 18,000 -2,204,000 1,843,000 -765,000                939,000                                             
          net decrease in cash, cash equivalents and restricted cash
        -13,937,000    -2,409,000  74,000 1,565,000 -7,748,000    -5,448,000  846,000 -4,527,000 -1,776,000   -1,231,000 -10,490,000   2,389,000 -5,146,000                                                     
          cash, cash equivalents and restricted cash at beginning of year
        83,389,000 57,244,000 53,607,000 37,239,000 36,406,000 45,175,000 39,263,000 43,910,000 20,000 45,579,000                                             
          cash, cash equivalents and restricted cash at end of period
        69,452,000  6,038,000 12,073,000 54,835,000  74,000 1,565,000 45,859,000  576,000    846,000 -4,527,000 34,630,000  4,872,000 -1,231,000 34,685,000  4,742,000 2,389,000 34,117,000  -100,000 -2,187,000 43,772,000  -7,356,000 -5,073,000 46,770,000                                             
          provision for accounts receivable allowances
                         947,000 902,000 656,000 390,000 679,000 696,000 254,000 424,000 805,000 590,000 297,000 440,000 353,000 278,000 374,000 201,000 239,000 149,000 490,000 287,000 1,486,000 566,000 142,000 -10,000 548,000 93,000 274,000 46,000 438,000 486,000 14,000 494,000 380,000 95,000 1,111,000 652,000 172,000 1,090,000 631,000 335,000 568,000 277,000 124,000 410,000 345,000 106,000 395,000 248,000 177,000            
          provision for inventory reserves
                         2,480,000 -461,000 222,000 811,000 317,000 717,000 636,000 365,000 -5,000 393,000 808,000 87,000 674,000 273,000 586,000 869,000 -41,000 524,000 265,000 457,000 1,430,000 442,000 855,000 9,000 1,472,000 221,000 576,000 208,000 1,006,000 781,000 627,000 2,031,000 482,000 165,000 1,109,000 1,155,000 944,000 1,131,000 814,000 493,000 905,000 737,000 513,000 1,316,000 1,548,000 703,000 1,236,000 735,000             
          pension termination expense
                                                                                    
          accounts receivable
                         7,906,000 -6,036,000 -10,332,000 -3,114,000 7,081,000 -1,907,000 -10,521,000 -5,192,000 3,088,000 3,297,000 -16,553,000 391,000 12,972,000 -9,876,000 -4,960,000 -2,635,000 6,039,000 40,000 -9,140,000 -6,144,000 2,451,000 -4,859,000 2,484,000 -2,368,000 909,000 -6,522,000 -304,000 2,952,000 2,979,000 -5,685,000 -4,818,000 -16,079,000 -9,477,000 -5,616,000 -8,460,000 -4,998,000 -3,778,000 -15,676,000 -17,475,000 -5,977,000 -12,305,000 -3,586,000 313,000 -7,171,000 -4,947,000 -5,899,000 -11,663,000 -11,113,000 -1,605,000 -9,998,000 -11,148,000 -8,681,000 -9,765,000 -8,457,000 -7,300,000 -6,531,000 -3,759,000 -2,458,000 -8,981,000  
          inventories
                         -9,452,000 -5,232,000 -4,316,000 -5,154,000 107,000 4,753,000 -1,299,000 -3,481,000 -2,564,000 -2,777,000 -1,738,000 -2,376,000 -3,791,000 368,000 -5,462,000 -4,818,000 -2,797,000 50,000 2,056,000 -1,517,000 -3,503,000 -1,266,000 -3,242,000 1,657,000 616,000 -870,000 -1,930,000 -113,000 -2,843,000 658,000 -621,000 5,204,000 4,945,000 241,000 654,000 -2,037,000 -724,000 -16,004,000 -9,689,000 -8,902,000 -5,333,000 -2,113,000 -1,674,000 4,268,000 431,000 717,000 -6,447,000 35,000 -2,839,000 -7,275,000 -5,628,000 -2,335,000 -1,158,000 -717,000 -43,000 438,000 658,000 806,000 -2,059,000  
          prepaid expenses
                         -6,955,000 -1,777,000 -2,376,000 8,134,000                                                         
          trade accounts payable and accrued liabilities
                          6,544,000 8,245,000 795,000  4,845,000 6,822,000 -2,112,000  2,826,000 7,284,000 1,481,000  5,138,000 6,844,000 -3,112,000  6,812,000 2,245,000 -210,000  8,674,000 3,218,000 -2,331,000                                     
          accrued income and other taxes
                         273,000                                                            
          contributions to company pension plan
         22,000                                                                          
          acquisition of businesses, net of cash
         -566,000       1,979,000 -14,068,000 -3,245,000 -12,990,000                                                             
          net increase in cash, cash equivalents and restricted cash
         10,443,000 6,038,000       9,871,000 576,000       -1,920,000    3,927,000    -2,222,000   -138,000 9,549,000   1,191,000                                             
          cash, cash equivalents and restricted cash at end of year
                    31,791,000                                                                 
          gain on sale of property and equipment
           19,000 -37,000 191,000         11,000 -50,000 -792,000  -12,000          -33,000   -68,000 -31,000   -6,000 -7,000               -133,000                  -167,000 -177,000  -44,000 -91,000 -23,000   
          payments of notes payable to banks
            -1,966,000    -5,307,000                                                                     
          goodwill impairment
                                                                                    
          gain from company owned life insurance policy
                                                                                     
          loss on exit of business
                     -171,000 207,000 989,000                                                             
          proceeds from company owned insurance policy
                                                                                     
          changes in operating assets and liabilities:
                  22,627,000 -8,159,000 -1,758,000                                                                 
          proceeds from company owned life insurance policy
                                                                                     
          payments on notes payable to banks
                    -4,524,000                                                                 
          increase in notes payable to banks
                     -878,000 2,236,000   -1,134,000 3,693,000 1,628,000 -3,811,000 823,000 3,494,000 1,811,000 3,337,000 1,123,000 -2,056,000 1,885,000 -1,307,000 5,315,000 1,076,000 1,119,000 936,000   697,000 -695,000 1,023,000 -509,000 -14,000 351,000 -629,000 -1,029,000 639,000 244,000 753,000  1,700,000 312,000   -1,260,000 -4,102,000 5,163,000 6,280,000 9,990,000 7,847,000 10,200,000 -3,000 655,000 140,000 818,000 366,000   -251,000 -111,000 -166,000 460,000 1,388,000 1,499,000  446,000 597,000  46,000 -3,000 
          adjustments to net cash from operations:
                                                                                     
          gain from company-owned life insurance policy
                      -4,364,000                                                             
          proceeds from company-owned life insurance policy
                      6,909,000                                                             
          other – net
                        630,000                                                         -503,000 -63,000   
          decrease in notes payable to banks
                        -2,656,000                              -554,000   -218,000 -123,000             -800,000 -987,000          -27,000   
          other - net
                         338,000 318,000 15,000 321,000 34,000 -364,000 327,000 -102,000 204,000 -137,000 40,000 98,000 -129,000 183,000 -131,000 68,000 83,000 193,000 126,000 -1,000 403,000 9,000 -304,000 275,000 91,000 5,000 -4,000 1,000 35,000    -18,000 -14,000  72,000                     168,000  
          changes in operating assets and liabilities assets:
                                                                                     
          trade accounts payables and accrued liabilities
                                                 -1,754,000 4,707,000 6,818,000 -4,119,000 140,000 -302,000 -2,752,000 3,522,000 4,577,000 206,000 8,504,000 8,604,000 917,000 13,088,000 7,518,000 1,373,000 10,000,000 4,446,000 736,000 3,629,000 3,154,000 2,632,000 9,269,000 4,950,000 2,898,000 5,149,000 7,168,000 2,371,000 2,021,000 1,584,000 658,000 2,709,000 818,000 637,000 4,030,000  
          purchase of marketable securities
                                 -496,000 -382,000 -4,308,000                                             
          proceeds from sale of marketable securities
                                                                                     
          purchase of company owned life insurance policies
                                                                                     
          effects of exchange rate changes on cash and cash equivalents
                         -1,644,000 485,000 42,000 223,000 2,346,000 -50,000 988,000 -1,805,000 1,003,000 -408,000 -2,662,000 1,292,000 -22,000 1,001,000   -1,099,000 702,000 593,000 1,046,000 522,000 -158,000 -1,262,000 -652,000 -379,000 2,982,000 -282,000 1,719,000 662,000 -1,520,000 -890,000 1,544,000 884,000 -189,000 132,000 -205,000 640,000 -711,000 -13,000 189,000 -322,000 -686,000 -350,000 1,962,000 1,055,000 -456,000 -860,000 54,000 -54,000 779,000 272,000 25,000 558,000 517,000 249,000 -971,000 -1,012,000 -425,000 94,000 228,000 
          income taxes - net
                           -33,000 -4,782,000  769,000 423,000 -328,000  1,669,000 986,000 -775,000  -3,031,000 572,000 1,733,000  610,000 717,000 1,997,000                                         
          income taxes
                                                                         718,000 1,412,000 1,458,000 269,000 2,860,000 1,192,000 331,000 1,929,000 -415,000 575,000 1,563,000  
          proceeds from marketable securities
                                                                                   
          purchase of company owned life insurance policy
                                                                                  
          acquisition, net of cash acquired
                                    -10,173,000                                                 
          fixed-term deposits
                                                                                     
          acquisition of businesses, net of cash acquired
                                  80,000                                                   
          excess tax benefits from share-based awards
                                               -16,000 8,000 40,000 -20,000 63,000 -160,000 -160,000 -159,000 -155,000  -116,000   -203,000 -190,000 -47,000    -75,000 -75,000                
          proceeds from the issuance of long-term debt
                                       14,969,000 20,303,000 17,024,000 13,519,000 9,575,000 15,463,000 13,761,000 13,381,000 27,426,000 15,706,000 11,947,000 13,372,000 13,744,000 12,879,000 15,347,000 45,484,000 29,546,000 49,319,000 33,643,000 18,532,000 51,974,000      172,000 11,946,000 5,209,000 1,174,000 706,000  6,500,000 3,600,000  1,311,000   3,038,000 3,019,000 2,534,000 680,000 155,000 149,000   
          business acquisitions, net of cash acquired
                                                     -14,740,000 -13,923,000    -5,173,000 -5,173,000 -6,176,000    -14,343,000                    
          restricted cash and purchase of fixed-term deposits
                                             -2,500,000 -4,530,000 3,216,000 1,382,000 -1,224,000 -3,472,000 2,277,000                                 
          net increase in cash and cash equivalents
                                         5,195,000   297,000 -2,203,000 4,797,000 -3,220,000 970,000 3,523,000 -3,860,000 200,000 887,000 921,000 294,000  3,033,000 3,078,000 -1,096,000 -4,011,000 -1,728,000 -2,940,000 1,096,000 962,000 1,491,000 -1,760,000 -1,987,000 654,000 15,651,000 7,832,000 926,000 2,021,000 577,000             
          cash and cash equivalents at beginning of year
                                         30,737,000 30,393,000 29,643,000 24,291,000 24,291,000 28,120,000 28,120,000 28,120,000 32,126,000 32,126,000 32,126,000 22,655,000 22,655,000 22,655,000 24,097,000 24,097,000 24,097,000    23,392,000 23,392,000 23,392,000 29,949,000 29,949,000 29,949,000 39,592,000 39,592,000 39,592,000 29,744,000 29,744,000 29,744,000 28,209,000 
          cash and cash equivalents at end of year
                                                                                     
          restricted cash and maturity (purchase) of fixed-term deposits - net
                                          889,000 4,372,000 2,551,000                                         
          excess tax expenses from share-based awards
                                                                                     
          cash and cash equivalents at end of period
                                          11,161,000 -3,032,000 31,034,000  4,797,000 -3,220,000 31,363,000  -3,860,000 200,000 30,530,000  24,585,000 21,173,000 31,153,000 31,198,000 27,024,000 28,115,000 30,398,000 29,186,000 23,751,000 23,617,000 24,146,000 22,337,000 22,110,000 24,751,000 35,520,000 27,701,000 20,795,000 24,775,000 23,331,000 21,831,000 20,574,000 23,529,000 21,392,000 26,026,000 34,424,000 32,443,000 34,880,000 31,219,000 31,553,000 30,008,000  
          net decrease in cash and cash equivalents
                                                       -3,118,000                              
          excess tax benefits (expenses) from share-based awards
                                                                                     
          income taxes payable
                                              1,360,000 -1,499,000 -196,000 -2,342,000 1,187,000 -877,000 -2,006,000 -1,290,000 -532,000 54,000 -5,153,000 -4,510,000 -2,786,000 -359,000 -535,000 -1,644,000 4,864,000 2,755,000 1,721,000 -171,000 -627,000 -1,348,000 -140,000 517,000 256,000 2,060,000 1,175,000             
          earn-out consideration payments
                                                          -112,000                           
          purchase of fixed term deposits
                                                                                     
          fixed term deposits
                                                      -823,000                               
          net investment in life insurance
                                                              -28,000 -19,000 -9,000 -38,000 -26,000 -13,000 -361,000 -33,000 320,000 -281,000 -196,000 -150,000 71,000 145,000 124,000 72,000 72,000  55,000 55,000    
          restricted cash and long-term term deposits
                                                                                     
          earn-out consideration payment
                                                        -520,000 -538,000  -1,148,000 -1,148,000                         
          other—net
                                                        -11,000 -7,000 -1,000   -9,000                        
          restricted cash
                                                              -330,000 -330,000 -198,000                     
          gain on acquisition of business
                                                                                     
          proceeds from the sale of discontinued operations
                                                                    750,000 750,000 750,000 10,486,000 11,783,000             
          proceeds on life insurance
                                                                                     
          payments on life insurance
                                                                                     
          unrealized foreign currency gain on hedge contract
                                                                  -451,000                   
          other — net
                                                               58,000 -60,000 -410,000 -5,000 -117,000 15,000 -9,000 -83,000 51,000 184,000 30,000 88,000 65,000 32,000 116,000 -826,000 -3,000 -452,000    -42,000 
          less: income from discontinued operations
                                                                       735,000 769,000             
          income from continuing operations
                                                                    12,518,000 6,259,000 2,717,000 14,127,000 7,670,000             
          net cash from discontinued operations
                                                                       -638,000 -638,000             
          operating cash flows
                                                                       958,000 958,000             
          investing cash flows
                                                                       -1,596,000 -1,596,000             
          business acquisitions
                                                                    -433,000 -433,000              -506,000 -10,000 
          cash and cash equivalents at beginning of period
                                                                    19,869,000 19,869,000 19,869,000               
          minority interest
                                                                       268,000              
          adjustments to reconcile net income to net cash from operating activities:
                                                                                     
          stock-based compensation expense
                                                                       196,000 88,000             
          excess tax benefits from stock-based awards
                                                                       -74,000 -16,000             
          business acquisitions — net of cash acquired
                                                                       -644,000 -237,000             
          dividends paid — net
                                                                       -3,195,000 -2,152,000             
          financing cash flows
                                                                                     
          changes in operating assets and liabilities, net of business acquisitions:
                                                                                     
          stock based compensation expense
                                                                         43,000 188,000 128,000 64,000 193,000 139,000 74,000      
          business acquisitions, net of cash acquired of 187
                                                                                     
          issuance of common shares
                                                                         64,000 487,000 487,000 3,000 102,000 87,000 10,000 686,000 551,000 428,000  
          decrease in cash and cash equivalents
                                                                         -1,561,000 -9,375,000 -6,420,000 -8,557,000         
          excess tax benefits from stock based awards
                                                                          193,000 193,000          
          increase in cash and cash equivalents
                                                                             -13,566,000 -5,168,000 -7,149,000 5,136,000 1,475,000 1,809,000 1,799,000 869,000 
          changes in operating assets and liabilities, net of acquisitions:
                                                                                     
          business acquisitions, net of cash received
                                                                          -8,443,000 -2,550,000 -2,550,000         
          changes in operating assets and liabilities, net of acquisition:
                                                                                     
          translation adjustment
                                                                             -42,000 -25,000  66,000 47,000 18,000   
          earnings of joint ventures
                                                                                   -21,000 59,000 
          dividends received from joint ventures
                                                                                   2,141,000 788,000 
          gain on sale of joint venture
                                                                                   -2,335,000  
          proceeds from the sale of equity investment
                                                                                   1,925,000  
          proceeds on life insurance — net
                                                                                     
          earnings of joint venture
                                                                                     
          dividends received from joint venture
                                                                                     
          see notes to consolidated financial statements.
                                                                                     
          asset impairment
                                                                                     
          noncash abandonment/realignment charges
                                                                                     
          cash surrender value of life insurance
                                                                                   274,000  
          cumulative translation adjustment
                                                                                   -34,000  
          proceeds from the issuance of debt
                                                                                   6,000 658,000 
          issuance (purchase) of common shares
                                                                                   -2,539,000  
          adjustments to reconcile net income to net cash from operations
                                                                                     
          noncash abandonment charges
                                                                                     
          payments of debt
                                                                                    -1,947,000