7Baggers

California Water Service Group
(NYSE:CWT) 

CWT stock logo

California Water Service Group, through its subsidiaries, provides water utility and other related services in California, Washington, New Mexico, and Hawaii. It is involved in the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, an...

Founded: 1926
Full Time Employees: 1,224
Sector: Utilities
Industry: Utilities-Regulated Water

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Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 
                                                                         
      operating revenue
    214,573,000 219,978,000 311,235,000 264,954,000 203,973,000 222,195,000 299,563,000 244,299,000 270,749,000 214,512,000 254,976,000 194,044,000 131,100,000 580,124,000 266,307,000 206,194,000 172,993,000 534,186,000 256,723,000 213,123,000 147,737,000 490,199,000 304,108,000 175,484,000 125,563,000 482,020,000 232,537,000 179,031,000 126,111,000 479,213,000 218,983,000 172,632,000 132,247,000 161,991,000 211,731,000 171,132,000 122,036,000 150,930,000 184,268,000 152,445,000 121,727,000 404,825,000 183,543,000 144,414,000 121,985,000 191,184,000 158,416,000 110,515,000 184,404,000 154,555,000 111,444,000 178,135,000 143,552,000 116,749,000 169,254,000 131,397,000 98,149,000 105,457,000 146,349,000 118,321,000 90,272,000 106,925,000 139,167,000 116,667,000 86,613,000 100,108,000 131,702,000 105,581,000 72,921,000 
      yoy
    5.20% -1.00% 3.90% 8.45% -24.66% 3.58% 17.49% 25.90% 106.52% -63.02% -4.25% -5.89% -24.22% 8.60% 3.73% -3.25% 17.10% 8.97% -15.58% 21.45% 17.66% 1.70% 30.78% -1.98% -0.43% 0.59% 6.19% 3.71% -4.64% 195.83% 3.43% 0.88% 8.37% 7.33% 14.90% 12.26% 0.25% -62.72% 0.40% 5.56% -0.21% 111.75% 15.86% 30.67% -33.85% 23.70% 42.15% -37.96% 28.46% 32.38% -34.16% 35.57% 46.26% 10.71% 15.65% 11.05% 8.73% -1.37% 5.16% 1.42% 4.22% 6.81% 5.67% 10.50% 18.78%     
      qoq
    -2.46% -29.32% 17.47% 29.90% -8.20% -25.83% 22.62% -9.77% 26.22% -15.87% 31.40% 48.01% -77.40% 117.84% 29.15% 19.19% -67.62% 108.08% 20.46% 44.26% -69.86% 61.19% 73.30% 39.76% -73.95% 107.29% 29.89% 41.96% -73.68% 118.84% 26.85% 30.54% -18.36% -23.49% 23.72% 40.23% -19.14% -18.09% 20.88% 25.24% -69.93% 120.56% 27.10% 18.39% -36.19% 20.68% 43.34% -40.07% 19.31% 38.68% -37.44% 24.09% 22.96% -31.02% 28.81% 33.88% -6.93% -27.94% 23.69% 31.07% -15.57% -23.17% 19.29% 34.70% -13.48% -23.99% 24.74% 44.79%  
      operating expenses:
                                                                         
      operations:
                                                                         
      water production costs
    71,329,000 62,799,250 102,703,000 85,503,000 62,991,000 59,230,000 95,091,000 77,644,000 64,185,000 54,555,500 92,347,000 70,867,000 55,008,000 22,187,500 88,750,000 70,907,000 61,538,000 21,237,750 84,951,000 74,911,000 54,826,000 21,336,000 85,344,000 71,142,000 53,976,000 20,142,000 80,568,000 64,635,000 45,592,000 19,704,500 78,818,000 65,373,000 47,606,000 45,365,000 75,261,000 64,131,000 42,068,000 42,208,250 70,175,000 57,589,000 41,069,000 15,109,250 60,437,000 53,022,000 45,202,000 66,980,000 61,915,000 45,402,000 70,614,000 59,645,000 41,697,000 66,489,000 52,678,000 38,952,000 61,593,000 44,745,000 31,958,000 31,730,750 54,634,000 41,834,000 30,455,000 29,867,000 48,898,000 41,702,000 28,868,000 28,040,500 46,455,000 40,349,000 25,358,000 
      administrative and general
    33,686,000 37,843,000 36,237,000 33,317,000 34,174,000 36,424,000 35,453,000 32,042,000 35,596,000 37,058,000 34,216,000 34,975,000 35,986,000 99,390,000 33,328,000 32,686,000 33,411,000 95,974,000 30,712,000 31,756,000 30,369,000 87,850,000 29,208,000 26,939,000 29,680,000 81,838,000 26,779,000 25,434,000 29,097,000 74,288,000 26,493,000 24,383,000 26,319,000 28,983,000 24,886,000 23,796,000 25,249,000 23,437,000 23,844,000 23,366,000 27,827,000 82,373,000 30,737,000 26,637,000 27,695,000 23,765,000 23,796,000 25,141,000 24,670,000 23,155,000 25,281,000 23,925,000 22,167,000 23,018,000 21,646,000 20,554,000 20,502,000 21,558,000 17,794,000 18,480,000 17,444,000 17,912,000 19,084,000 19,386,000 18,861,000 17,181,000 14,995,000 13,835,000 13,418,000 
      other operations
    31,233,000 36,120,000 33,455,000 31,695,000 28,836,000 32,288,000 33,618,000 25,626,000 26,925,000 37,723,000 32,331,000 25,823,000 16,604,000 89,496,000 26,676,000 29,417,000 25,852,000 61,706,000 24,686,000 20,720,000 17,912,000 66,113,000 29,746,000 25,898,000 13,974,000 65,511,000 24,550,000 22,542,000 17,821,000 57,925,000 21,943,000 20,724,000 17,640,000 18,788,000 21,208,000 18,328,000 16,124,000 14,441,500 19,561,000 18,903,000 19,302,000 4,468,000 17,872,000 17,512,000 15,843,000 15,692,000 16,004,000 16,376,000 17,657,000 17,030,000 15,645,000 17,658,000 17,729,000 23,826,000 17,506,000 15,738,000 14,635,000 10,801,000 14,889,000 14,749,000 13,566,000 10,356,250 14,639,000 14,330,000 12,456,000 9,441,500 12,935,000 12,766,000 12,065,000 
      maintenance
    8,366,000 9,478,000 9,812,000 9,043,000 7,668,000 8,689,000 9,264,000 8,790,000 8,010,000 7,912,000 8,930,000 7,155,000 7,978,000 23,282,000 8,433,000 7,615,000 7,341,000 21,853,000 7,739,000 6,610,000 6,769,000 20,897,000 7,129,000 6,722,000 7,073,000 19,769,000 7,065,000 5,692,000 6,455,000 17,726,000 6,768,000 5,389,000 5,439,000 5,653,000 6,057,000 4,708,000 6,112,000 5,451,000 5,545,000 5,934,000 6,063,000 15,511,000 5,952,000 5,326,000 4,457,000 4,800,000 4,988,000 5,005,000 4,575,000 4,188,000 4,133,000 4,377,000 4,605,000 5,760,000 4,651,000 5,288,000 5,199,000 4,723,000 4,853,000 5,158,000 4,951,000 5,185,000 4,405,000 4,312,000 4,635,000 6,085,000 3,824,000 4,947,000 4,114,000 
      depreciation and amortization
    39,964,000 36,262,000 36,118,000 36,029,000 35,956,000 33,014,000 33,065,000 32,978,000 32,844,000 31,576,000 29,897,000 29,824,000 29,915,000 85,731,000 28,844,000 28,773,000 28,770,000 81,483,000 27,232,000 27,237,000 27,047,000 73,806,000 24,699,000 24,542,000 24,492,000 66,947,000 22,273,000 22,326,000 22,368,000 62,772,000 21,009,000 20,953,000 20,715,000 19,133,000 19,231,000 19,218,000 19,201,000 15,827,000 15,884,000 15,842,000 16,046,000 46,039,000 15,342,000 15,354,000 15,319,000 14,648,000 16,087,000 16,053,000 14,505,000 14,491,000 14,629,000 13,720,000 13,712,000 13,951,000 12,729,000 12,373,000 12,588,000 10,464,000 10,934,000 10,638,000 10,792,000 9,039,000 10,259,000 10,282,000 10,198,000 9,560,000 9,281,000 9,276,000 9,222,000 
      income tax expense
    74,000     -3,772,000 15,483,000 8,689,000 15,538,000 -13,823,000 3,949,000 329,000                 -2,991,000            -925,000    613,000                         
      property and other taxes
    11,757,000 11,008,000 11,656,000 10,643,000 10,968,000 9,578,000 10,841,000 10,364,000 9,757,000 8,540,000 9,832,000 9,122,000 8,777,000 25,625,000 9,440,000 8,053,000 8,360,000 23,929,000 8,546,000 7,671,000 7,996,000 21,913,000 8,116,000 7,126,000 7,228,000 21,251,000 7,541,000 7,068,000 7,293,000 20,154,000 7,142,000 6,407,000 6,704,000 6,080,000 6,544,000 6,057,000 6,116,000 5,792,000 5,957,000 5,407,000 6,075,000 15,850,000 5,709,000 4,968,000 5,359,000 5,232,000 5,144,000 5,225,000 5,414,000 5,715,000 5,435,000 5,218,000 3,977,000 4,607,000 5,170,000 4,506,000 4,560,000 4,558,000 4,555,000 4,087,000 3,903,000 4,451,000 4,371,000 3,911,000 4,088,000 3,676,000 3,940,000 3,484,000 3,739,000 
      total operating expenses
    196,409,000 194,378,000 240,620,000 213,145,000 181,628,000 189,949,000 232,815,000 196,133,000 192,855,000 179,276,000 211,502,000 178,095,000 148,624,000 517,410,000 201,361,000 178,905,000 163,855,000 478,568,000 185,571,000 170,877,000 144,818,000 459,595,000 198,046,000 162,991,000 132,486,000 434,175,000 180,970,000 152,018,000 125,635,000 414,221,000 173,435,000 147,576,000 124,194,000 141,873,000 170,535,000 145,873,000 113,986,000 129,595,000 154,213,000 133,911,000 115,457,000 365,873,000 151,342,000 127,921,000 114,488,000 150,350,000 135,124,000 109,363,000 148,600,000 133,772,000 105,674,000 141,774,000 123,930,000 110,142,000 139,176,000 111,842,000 88,201,000 93,546,000 120,484,000 102,037,000 82,514,000 95,129,000 115,073,000 100,712,000 80,338,000 88,714,000 104,940,000 91,099,000 68,090,000 
      net operating income
    18,164,000 25,600,000 70,615,000 51,809,000 22,345,000 32,246,000 66,748,000 48,166,000 77,894,000 35,236,000 43,474,000 15,949,000 -17,524,000 62,714,000 64,946,000 27,289,000 9,138,000 55,618,000 71,152,000 42,246,000 2,919,000 30,604,000 106,062,000 12,493,000 -6,923,000 47,845,000 51,567,000 27,013,000 476,000 64,992,000 45,548,000 25,056,000 8,053,000 20,118,000 41,196,000 25,259,000 8,050,000 21,335,000 30,055,000 18,534,000 6,270,000 38,952,000 32,201,000 16,493,000 7,497,000 40,834,000 23,292,000 1,152,000 35,804,000 20,783,000 5,770,000 36,361,000 19,622,000 6,607,000 30,078,000 19,555,000 9,948,000 11,911,000 25,865,000 16,284,000 7,758,000 11,796,000 24,094,000 15,955,000 6,275,000 11,394,000 26,762,000 14,482,000 4,831,000 
      yoy
    -18.71% -20.61% 5.79% 7.56% -71.31% -8.49% 53.54% 202.00% -544.50% -43.81% -33.06% -41.56% -291.77% 12.76% -8.72% -35.40% 213.05% 81.73% -32.91% 238.16% -142.16% -36.04% 105.68% -53.75% -1554.41% -26.38% 13.21% 7.81% -94.09% 223.05% 10.56% -0.80% 0.04% -5.70% 37.07% 36.28% 28.39% -45.23% -6.66% 12.37% -16.37% -4.61% 38.25% 1331.68% -79.06% 96.48% 303.67% -96.83% 82.47% 214.56% -80.82% 85.94% 97.25% -44.53% 16.29% 20.09% 28.23% 0.97% 7.35% 2.06% 23.63% 3.53% -9.97% 10.17% 29.89%     
      qoq
    -29.05% -63.75% 36.30% 131.86% -30.70% -51.69% 38.58% -38.16% 121.06% -18.95% 172.58% -191.01% -127.94% -3.44% 137.99% 198.63% -83.57% -21.83% 68.42% 1347.28% -90.46% -71.15% 748.97% -280.46% -114.47% -7.22% 90.90% 5575.00% -99.27% 42.69% 81.78% 211.14% -59.97% -51.17% 63.09% 213.78% -62.27% -29.01% 62.16% 195.60% -83.90% 20.97% 95.24% 119.99% -81.64% 75.31% 1921.88% -96.78% 72.28% 260.19% -84.13% 85.31% 196.99% -78.03% 53.81% 96.57% -16.48% -53.95% 58.84% 109.90% -34.23% -51.04% 51.01% 154.26% -44.93% -57.42% 84.79% 199.77%  
      operating margin %
    8.47% 11.64% 22.69% 19.55% 10.95% 14.51% 22.28% 19.72% 28.77% 16.43% 17.05% 8.22% -13.37% 10.81% 24.39% 13.23% 5.28% 10.41% 27.72% 19.82% 1.98% 6.24% 34.88% 7.12% -5.51% 9.93% 22.18% 15.09% 0.38% 13.56% 20.80% 14.51% 6.09% 12.42% 19.46% 14.76% 6.60% 14.14% 16.31% 12.16% 5.15% 9.62% 17.54% 11.42% 6.15% 21.36% 14.70% 1.04% 19.42% 13.45% 5.18% 20.41% 13.67% 5.66% 17.77% 14.88% 10.14% 11.29% 17.67% 13.76% 8.59% 11.03% 17.31% 13.68% 7.24% 11.38% 20.32% 13.72% 6.62% 
      other income and expenses:
                                                                         
      non-regulated revenue
    5,221,000 5,435,000 5,349,000 4,911,000 5,081,000 5,884,000 4,133,000 5,513,000 5,098,000 4,866,000 4,535,000 4,485,000 4,623,000 16,703,000 4,573,000 7,002,000 5,197,000 16,948,000 5,813,000 5,374,000 5,572,000 12,988,000 3,934,000 4,208,000 3,827,000 15,087,000 4,118,000 5,130,000 4,901,000 13,569,000 4,703,000 4,845,000 4,419,000 5,155,000 3,542,000 3,739,000 3,462,000 5,996,000 3,397,000 3,764,000 3,428,000 11,810,000 3,814,000 3,479,000 3,247,000 4,409,000 3,474,000 4,280,000 3,649,000 3,215,000 3,522,000 3,756,000 4,051,000 4,136,000 3,425,000 3,739,000 4,333,000 5,030,000 3,850,000 3,692,000 3,422,000 7,017,000 5,194,000 3,098,000 2,881,000 4,778,000 3,805,000 1,696,000 2,905,000 
      non-regulated expenses
    -5,457,000 -5,859,000 -2,456,000 -2,868,000 -3,466,000 -7,188,000 -934,000 -4,125,000 -1,954,000 -583,000 -5,992,000 -2,957,000 -2,275,000 -17,916,000 -6,905,000 -8,541,000 -6,986,000 -11,455,000 -5,779,000 -1,815,000 -4,760,000 -11,435,000 -2,865,000 -492,000 -8,454,000 -9,518,000 -4,351,000 -3,900,000 -2,219,000 -17,890,000 -4,897,000 -6,115,000 -5,437,000 -3,146,000 -2,576,000 -1,614,000 -2,054,000 -3,139,000 -2,517,000 -2,809,000 -2,980,000 -1,113,500 -4,454,000              -3,424,000 -2,362,750 -2,214,000 -3,691,000 -3,546,000 -1,706,500 -3,464,000 -721,000 -2,641,000 -2,428,750   -3,036,000 
      other components of net periodic benefit credit
    3,972,000 4,293,000 4,548,000 4,589,000 4,800,000 3,741,000 4,451,000 4,338,000 3,273,000 5,462,000 4,776,000 4,756,000 5,221,000 10,739,000 3,737,000 3,765,000 4,014,000 8,050,000 1,853,000 2,688,000 2,979,000                                                 
      allowance for equity funds used during construction
    2,079,000 1,869,000 2,145,000 1,898,000 1,797,000 1,650,000 1,691,000 1,819,000 1,742,000 1,405,000 1,387,000 1,355,000 1,404,000 3,123,000 1,004,000 1,042,000 975,000 2,288,000 898,000 848,000 544,000 4,003,000 973,000 1,705,000 1,614,000 4,817,000 1,868,000 1,686,000 1,533,000 2,931,000 1,023,000 710,000 911,000 987,000 1,105,000 879,000 779,000                                 
      income tax expense on other income and expenses
    -1,391,000     -1,985,000 -1,939,000 -1,306,000 -1,321,000 -4,106,000 -1,063,000 -1,445,000 -1,794,000 -2,760,000 -353,000 -345,000 -512,000 -1,080,000 -207,000 -512,000    -820,000          -1,488,000 -841,000 -1,217,000 -889,000 -1,098,000    -32.75                            
      net other income
    4,424,000 3,263,000 7,626,000 6,778,000 6,509,000 2,102,000 7,402,000 6,239,000 6,838,000 7,044,000 3,643,000 6,194,000 7,179,000 9,889,000 2,056,000 2,923,000 2,688,000 14,845,000 2,578,000 6,583,000 3,977,000 1,238,000 789,000 3,269,000 -3,530,000 4,817,000 108,000 1,237,000 2,128,000   -2,204,000  2,171,000 1,230,000 1,787,000 1,298,000 1,613,000 531,000 571,000 267,000 1,133,792   601,000  740,000 82,000 494,000  654,000 637,000 218,000 1,214,000  180,000 543,000         -346,000 -408,000   
      interest expense:
                                                                         
      interest expense
    19,619,000 18,306,000 18,113,000 17,464,000 16,509,000 15,674,000 14,384,000 14,840,000 15,800,000 13,018,000 13,482,000 13,491,000 12,818,000 34,795,000 11,891,000 11,586,000 11,495,000 33,243,000 11,737,000 11,206,000 10,222,000 33,885,000 11,162,000 11,613,000 10,798,000 34,612,000 10,279,000 12,178,000 11,075,000 29,042,000 10,875,000 10,134,000 9,198,000 9,215,000 9,284,000 9,079,000 8,710,000 8,482,000 8,485,000 8,434,000 8,065,000 21,984,000 7,201,000 7,061,000 7,069,000 7,221,000 7,077,000 7,075,000 7,687,000 7,803,000 8,037,000 8,024,000 7,821,000 7,639,000 8,007,000 8,061,000 8,488,000 7,550,000 6,958,000 6,939,000 6,490,000 6,914,000 6,480,000 5,962,000 5,038,000 5,186,000 5,233,000 5,157,000 5,014,000 
      allowance for borrowed funds used during construction
    -1,068,000 -923,000 -988,000 -927,000 -857,000 -790,000 -788,000 -812,000 -758,000 -676,000 -690,000 -795,000 -829,000 -1,772,000 -572,000 -589,000 -563,000 -1,260,000 -506,000 -453,000 -294,000 -2,514,000 -671,000 -1,132,000 -944,000 -2,642,000 -1,028,000 -924,000 -831,000 -1,503,000 -560,000 -304,000 -495,000 -595,000 -707,000 -564,000 -494,000                                 
      net interest expense
    18,551,000 17,383,000 17,125,000 16,537,000 15,652,000 14,884,000 13,596,000 14,028,000 15,042,000 12,342,000 12,792,000 12,696,000 11,989,000 33,023,000 11,319,000 10,997,000 10,932,000 31,983,000 11,231,000 10,753,000 9,928,000 31,371,000 10,491,000 10,481,000 9,854,000 31,970,000 9,251,000 11,254,000 10,244,000 27,539,000 10,315,000 9,830,000 8,703,000 8,620,000 8,577,000 8,515,000 8,216,000 7,858,000 7,711,000 7,597,000 7,335,000 20,567,000 6,703,000 6,633,000 6,523,000 6,950,000 6,862,000 6,710,000 7,147,000 7,264,000 7,497,000 7,226,000 6,875,000 6,736,000 7,333,000 7,545,000 7,772,000 8,325,000 6,474,000 5,904,000  6,103,000 5,530,000 5,322,000   4,168,000   
      net income
    4,037,000 11,480,000 61,116,000 42,050,000 13,202,000 19,464,000 60,554,000 40,377,000 69,690,000 29,938,000 34,325,000 9,447,000 -22,334,000 39,580,000 55,683,000 19,215,000 894,000 38,480,000 62,499,000 38,076,000 -3,032,000 471,000 96,360,000 5,281,000 -20,307,000 20,692,000 42,424,000 16,996,000 -7,640,000 31,192,000 34,392,000 13,022,000 -2,545,000 13,669,000 33,849,000 18,531,000 1,132,000 15,090,000 22,875,000 11,508,000 -798,000 19,897,000 25,120,000 9,845,000 1,575,000 33,650,000 17,170,000 -5,476,000 29,151,000 13,510,000 -1,073,000 29,772,000 12,965,000 1,085,000 20,935,000 12,190,000 2,719,000 4,871,000 20,386,000 10,381,000 2,018,000 6,451,000 19,592,000 12,090,000 2,421,000 7,318,000 22,186,000 10,116,000 185,000 
      yoy
    -69.42% -41.02% 0.93% 4.14% -81.06% -34.99% 76.41% 327.41% -412.04% -24.36% -38.36% -50.84% -2598.21% 2.86% -10.91% -49.54% -129.49% 8069.85% -35.14% 621.00% -85.07% -97.72% 127.14% -68.93% 165.80% -33.66% 23.35% 30.52% 200.20% 128.20% 1.60% -29.73% -324.82% -9.42% 47.97% 61.03% -241.85% -24.16% -8.94% 16.89% -150.67% -40.87% 46.30% -279.78% -94.60% 149.07% -1700.19% -118.39% 124.84% 1145.16% -105.13% 144.23% 376.83% -77.73% 2.69% 17.43% 34.74% -24.49% 4.05% -14.14% -16.65% -11.85% -11.69% 19.51% 1208.65%     
      qoq
    -64.83% -81.22% 45.34% 218.51% -32.17% -67.86% 49.97% -42.06% 132.78% -12.78% 263.34% -142.30% -156.43% -28.92% 189.79% 2049.33% -97.68% -38.43% 64.14% -1355.80% -743.74% -99.51% 1724.65% -126.01% -198.14% -51.23% 149.61% -322.46% -124.49% -9.30% 164.11% -611.67% -118.62% -59.62% 82.66% 1537.01% -92.50% -34.03% 98.77% -1542.11% -104.01% -20.79% 155.15% 525.08% -95.32% 95.98% -413.55% -118.78% 115.77% -1359.09% -103.60% 129.63% 1094.93% -94.82% 71.74% 348.33% -44.18% -76.11% 96.38% 414.42% -68.72% -67.07% 62.05% 399.38% -66.92% -67.02% 119.32% 5368.11%  
      net income margin %
    1.88% 5.22% 19.64% 15.87% 6.47% 8.76% 20.21% 16.53% 25.74% 13.96% 13.46% 4.87% -17.04% 6.82% 20.91% 9.32% 0.52% 7.20% 24.34% 17.87% -2.05% 0.10% 31.69% 3.01% -16.17% 4.29% 18.24% 9.49% -6.06% 6.51% 15.71% 7.54% -1.92% 8.44% 15.99% 10.83% 0.93% 10.00% 12.41% 7.55% -0.66% 4.91% 13.69% 6.82% 1.29% 17.60% 10.84% -4.95% 15.81% 8.74% -0.96% 16.71% 9.03% 0.93% 12.37% 9.28% 2.77% 4.62% 13.93% 8.77% 2.24% 6.03% 14.08% 10.36% 2.80% 7.31% 16.85% 9.58% 0.25% 
      net loss attributable to noncontrolling interest
     -2,000 -114,000 -118,000 -129,000 -195,000 -126,000                                                               
      net income attributable to california water service group
    4,037,000 11,482,000 61,230,000 42,168,000 13,331,000 19,659,000 60,680,000 40,551,000 69,917,000 30,128,000 34,438,000 9,556,000 -22,211,000 40,139,000 55,872,000 19,484,000 1,086,000 38,696,000 62,429,000 38,225,000                                                  
      earnings per share:
                                                                         
      basic
    0.07 0.19 1.03 0.71 0.22 0.33 1.03 0.7 1.21 0.53 0.6 0.17 -0.4 0.74 1.03 0.36 0.02 0.76 1.2 0.75  0.03 1.94 0.11  0.43 0.88 0.35  0.64 0.72 0.27 -0.05 0.29 0.7 0.39 0.02 0.32 0.48 0.24  0.42 0.52   0.7 0.36  0.61 0.28 -0.03 0.71 0.31 0.03 0.5 0.29 0.13 0.23 0.98 0.5 0.1 0.31 0.94 0.58 0.12 0.35 1.06 0.48 0.01 
      diluted
    0.07 0.19 1.03 0.71 0.22 0.32 1.03 0.7 1.21 0.53 0.6 0.17 -0.4 0.74 1.03 0.36 0.02 0.76 1.2 0.75  0.03 1.94 0.11  0.43 0.88 0.35  0.64 0.72 0.27 -0.05 0.29 0.7 0.39 0.02 0.31 0.48 0.24  0.42 0.52   0.7 0.36  0.61 0.28 -0.03 0.71 0.31 0.03 0.5 0.29 0.13 0.23 0.98 0.5 0.1 0.31 0.94 0.58 0.12 0.35 1.06 0.48 0.01 
      weighted-average shares outstanding:
                                                                         
      basic
    59,699 59,570 59,585 59,574 59,511 58,612 58,931 58,292 57,733 56,952 57,704 56,692 55,666 54,320 54,007 54,007 53,731 51,633 51,823 51,080 50,440 49,274 49,576 48,936 48,583 48,168 48,141 48,136 48,086 48,060 48,070 48,073 48,030 48,009 48,017 48,020 47,984 47,953 47,969 47,972 47,905 47,865 47,878  47,825 47,803 47,804 47,756 47,737 47,729 42,248 41,905 41,911 41,842 41,780 41,752 20,848 20,806 20,811 20,803 20,778 20,745 20,745 20,745 20,730 20,710 20,717 20,717 20,688 
      diluted
    59,771 59,633 59,653 59,629 59,566 58,647 58,982 58,325 57,774 56,983 57,740 56,730 55,666 54,363 54,042 54,042 53,775 51,633 51,823 51,080 50,440 49,274 49,576 48,936 48,583 48,168 48,141 48,136 48,086 48,060 48,070 48,073 48,030 48,009 48,017 48,020 47,984 47,956 47,969 47,972 47,905 47,880 47,887  47,854 47,840 47,837 47,756 47,770 47,760 42,248 41,905 41,911 41,842 41,789 41,768 20,856 20,819 20,824 20,818 20,793 20,766 20,767 20,767 20,759 20,734 20,740 20,741 20,711 
      income taxes
     4,647,250 10,639,000 6,915,000 1,035,000         -2,628,000 5,890,000 1,454,000  1,100,000 1,705,000 1,972,000  -2,369,000 13,804,000 622,000  4,086,000 12,194,000 4,321,000  7,327,000 11,262,000 4,347,000  2,829,000 17,348,000 9,635,000  5,612,000 13,247,000 6,870,000  9,235,000 15,293,000 5,102,000  19,233,000 7,190,000  11,165,000 9,548,000  10,387,000 9,062,000  15,881,000 8,638,000  1,745,000 12,825,000 7,091,000 1,403,000 3,374,000 13,417,000 6,789,000 1,232,000 4,380,000 13,510,000 6,442,000 174,000 
      income taxes on other income and expenses
     -1,353,750 -1,960,000 -1,752,000 -1,703,000                 -38                                                
      net loss attributable to noncontrolling interests
           -174,000 -227,000 -190,000 -113,000 -109,000 -123,000 -747,350  -269,000 -192,000 -145,921                                                    
      earnings per share of common stock:
                                                                         
      basic
    0.07 0.19 1.03 0.71 0.22 0.33 1.03 0.7 1.21 0.53 0.6 0.17 -0.4 0.74 1.03 0.36 0.02 0.76 1.2 0.75  0.03 1.94 0.11  0.43 0.88 0.35  0.64 0.72 0.27 -0.05 0.29 0.7 0.39 0.02 0.32 0.48 0.24  0.42 0.52   0.7 0.36  0.61 0.28 -0.03 0.71 0.31 0.03 0.5 0.29 0.13 0.23 0.98 0.5 0.1 0.31 0.94 0.58 0.12 0.35 1.06 0.48 0.01 
      diluted
    0.07 0.19 1.03 0.71 0.22 0.32 1.03 0.7 1.21 0.53 0.6 0.17 -0.4 0.74 1.03 0.36 0.02 0.76 1.2 0.75  0.03 1.94 0.11  0.43 0.88 0.35  0.64 0.72 0.27 -0.05 0.29 0.7 0.39 0.02 0.31 0.48 0.24  0.42 0.52   0.7 0.36  0.61 0.28 -0.03 0.71 0.31 0.03 0.5 0.29 0.13 0.23 0.98 0.5 0.1 0.31 0.94 0.58 0.12 0.35 1.06 0.48 0.01 
      income tax benefit
                -5,644,000    -1,417,000    -101,000    -3,937,000        -229,000    -884,000                 28,000                
      net income attributable to noncontrolling interests
                 -47,250 -189,000   17,500 70,000                                                   
      loss attributable to noncontrolling interests
                       149,000                                                  
      income tax benefit on other income and expenses
                        -358,000 -338,000 -245,000   -1,721,000 330,000 -487,000 -828,000 2,412,000 305,000 819,000 758,000      -349,000 -384,000  65,500 262,000 10,000  169,000    16,000       -366,000             
      loss per share:
                                                                         
      basic
                        -0.06    -0.42    -0.16                                         
      diluted
                        -0.06    -0.42    -0.16                                         
      other components of net periodic benefit cost
                         -3,980,000 -1,008,000 -1,332,000 -1,430,000 -3,876,000 -1,857,000 -1,192,000 -1,259,000 -7,333,000 -1,975,000 -2,463,000 -2,546,000                                     
      income tax benefit (expense) on other income and expenses
                            913,000                              1,254,000               
      net other loss
                                 -6,261,000 -841,000  -1,895,000         -94,500 -378,000                           
      dividends declared per share of common stock
                                 0.047 0.188 0.188 0.188 0.135 0.18 0.18 0.18 0.129 0.173 0.173 0.173 0.042 0.168 0.168 0.168 0.163 0.163 0.163 0.16 0.16 0.16 0.158 0.158 0.158 0.154 0.154 0.308 0.223 0.298 0.298 0.298 0.221 0.295 0.295 0.295    0.293 
      less: capitalized interest
                                         -624,000 -774,000 -837,000 -730,000 -1,417,000 -498,000              -716,000 775,000 -484,000 -1,035,000 -819,000 -811,000 -950,000 -640,000 -679,000 -1,456,000 -1,065,000 -439,000 -450,000 
      income tax (expense) on other income and expenses
                                            -181,000                             
      net income per share
                                                                         
      basic
                                            -0.02   0.21 0.03                         
      diluted
                                            -0.02   0.21 0.03                         
      net other (loss) income
                                                                         
      weighted average shares outstanding
                                                                         
      basic
                                               47,880                          
      diluted
                                               47,892                          
      weighted-average shares outstanding
                                                                         
      basic
    59,699 59,570 59,585 59,574 59,511 58,612 58,931 58,292 57,733 56,952 57,704 56,692 55,666 54,320 54,007 54,007 53,731 51,633 51,823 51,080 50,440 49,274 49,576 48,936 48,583 48,168 48,141 48,136 48,086 48,060 48,070 48,073 48,030 48,009 48,017 48,020 47,984 47,953 47,969 47,972 47,905 47,865 47,878  47,825 47,803 47,804 47,756 47,737 47,729 42,248 41,905 41,911 41,842 41,780 41,752 20,848 20,806 20,811 20,803 20,778 20,745 20,745 20,745 20,730 20,710 20,717 20,717 20,688 
      diluted
    59,771 59,633 59,653 59,629 59,566 58,647 58,982 58,325 57,774 56,983 57,740 56,730 55,666 54,363 54,042 54,042 53,775 51,633 51,823 51,080 50,440 49,274 49,576 48,936 48,583 48,168 48,141 48,136 48,086 48,060 48,070 48,073 48,030 48,009 48,017 48,020 47,984 47,956 47,969 47,972 47,905 47,880 47,887  47,854 47,840 47,837 47,756 47,770 47,760 42,248 41,905 41,911 41,842 41,789 41,768 20,856 20,819 20,824 20,818 20,793 20,766 20,767 20,767 20,759 20,734 20,740 20,741 20,711 
      earnings per share
                                                                         
      basic
    0.07 0.19 1.03 0.71 0.22 0.33 1.03 0.7 1.21 0.53 0.6 0.17 -0.4 0.74 1.03 0.36 0.02 0.76 1.2 0.75  0.03 1.94 0.11  0.43 0.88 0.35  0.64 0.72 0.27 -0.05 0.29 0.7 0.39 0.02 0.32 0.48 0.24  0.42 0.52   0.7 0.36  0.61 0.28 -0.03 0.71 0.31 0.03 0.5 0.29 0.13 0.23 0.98 0.5 0.1 0.31 0.94 0.58 0.12 0.35 1.06 0.48 0.01 
      diluted
    0.07 0.19 1.03 0.71 0.22 0.32 1.03 0.7 1.21 0.53 0.6 0.17 -0.4 0.74 1.03 0.36 0.02 0.76 1.2 0.75  0.03 1.94 0.11  0.43 0.88 0.35  0.64 0.72 0.27 -0.05 0.29 0.7 0.39 0.02 0.31 0.48 0.24  0.42 0.52   0.7 0.36  0.61 0.28 -0.03 0.71 0.31 0.03 0.5 0.29 0.13 0.23 0.98 0.5 0.1 0.31 0.94 0.58 0.12 0.35 1.06 0.48 0.01 
      income tax
                                                                         
      loss per share
                                                                         
      basic
                                                   -0.11                      
      diluted
                                                                         
      gain on sale of non-utility property
                                                           62,000  -11,000 33,000   -115,000  72,000 603,000   7,000  
      income tax (benefit) expense
                                                            -1,241,000             
      income taxes (expense) on other income and expenses
                                                             -153,500 -674,000           
      net other income and expenses
                                                              995,000 1,000   1,028,000 1,457,000      
      income taxes expense on other income and expenses
                                                                   -992,000      
      income taxes benefit on other income and expenses
                                                                55,000 -508,000 -702,000  -338,000     
      net other (expenses) income
                                                                -69,000         
      total interest expense
                                                                5,671,000    4,359,000 3,362,500  4,718,000 4,564,000 
      total other income and expenses
                                                                    505,000   352,000 -82,000 
      non-regulated expense
                                                                      -4,501,000 -1,132,000  
      less: income tax credit (provision) on other income and expenses
                                                                     29,500 288,000   
      dividends per share of common stock
                                                                     0.219 0.293 0.293  
      less: income taxes on other income and expenses
                                                                       -219,000 49,000 
      for the three months ended:
                                                                         
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 
                                                                           
        assets
                                                                           
        utility plant:
                                                                           
        utility plant
      6,012,052,000  5,762,800,000 5,627,888,000 5,498,140,000  5,263,692,000 5,141,580,000 5,022,535,000  4,817,310,000 4,715,310,000 4,612,350,000  4,422,312,000 4,341,433,000 4,261,451,000  4,124,024,000 4,047,282,000 3,952,681,000  3,835,194,000 3,752,243,000 3,616,418,000  3,411,219,000 3,346,165,000 3,281,149,000  3,169,726,000 3,094,616,000 3,025,611,000  2,892,666,000 2,826,187,000 2,766,232,000  2,667,635,000 2,621,322,000 2,560,787,000  2,460,829,000 2,419,050,000 2,373,167,000 2,306,427,000 2,269,779,000 2,236,187,000 2,190,573,000 2,160,706,000 2,123,935,000 2,065,679,000 2,026,567,000 1,994,794,000 1,927,447,000 1,895,384,000 1,869,420,000  1,819,330,000 1,786,888,000 1,749,688,000  1,676,287,000 1,638,356,000 1,605,014,000  1,552,267,000 1,503,926,000 1,468,966,000 
        less accumulated depreciation and amortization
      -1,346,695,000 -1,329,652,000 -1,318,798,000 -1,293,277,000 -1,267,925,000 -1,241,785,000 -1,222,808,000 -1,199,399,000 -1,174,013,000 -1,152,228,000 -1,568,986,000 -1,537,580,000 -1,508,913,000 -1,477,402,000 -1,434,700,000 -1,406,757,000 -1,374,036,000 -1,350,482,000 -1,327,655,000 -1,300,676,000 -1,267,745,000 -1,239,865,000 -1,238,880,000 -1,214,427,000 -1,169,447,000 -1,144,115,000 -1,067,965,000 -1,043,960,000 -1,021,590,000 -996,723,000 -983,984,000 -964,352,000 -942,573,000 -922,214,000 -910,742,000 -897,575,000 -878,227,000 -858,062,000 -849,884,000 -836,245,000 -821,108,000 -805,178,000 -797,264,000              -561,055,000 -549,469,000 -538,919,000 -533,424,000 -522,508,000 -510,985,000 -501,704,000 -492,989,000 -482,235,000 -470,712,000 -463,375,000 -455,862,000 -446,637,000 
        net utility plant
      4,665,357,000 4,579,590,000 4,444,002,000 4,334,611,000 4,230,215,000 4,158,704,000 4,040,884,000 3,942,181,000 3,848,522,000 3,773,255,000 3,248,324,000 3,177,730,000 3,103,437,000 3,058,870,000 2,987,612,000 2,934,676,000 2,887,415,000 2,846,862,000 2,796,369,000 2,746,606,000 2,684,936,000 2,650,558,000 2,596,314,000 2,537,816,000 2,446,971,000 2,406,370,000 2,343,254,000 2,302,205,000 2,259,559,000 2,232,723,000 2,185,742,000 2,130,264,000 2,083,038,000 2,047,965,000 1,981,924,000 1,928,612,000 1,888,005,000 1,859,277,000 1,817,751,000 1,785,077,000 1,739,679,000 1,701,768,000 1,663,565,000 1,636,676,000 1,606,622,000 1,560,685,000 1,539,513,000 1,523,118,000 1,505,222,000 1,490,254,000 1,468,590,000 1,443,126,000 1,419,254,000 1,400,621,000 1,347,438,000 1,327,596,000 1,308,365,000 1,294,297,000 1,280,411,000 1,253,464,000 1,227,180,000 1,198,077,000 1,174,583,000 1,145,367,000 1,122,779,000 1,112,367,000 1,088,892,000 1,048,064,000 1,022,329,000 
        current assets:
                                                                           
        cash and cash equivalents
      58,102,000 51,820,000 75,990,000 50,539,000 44,460,000 50,121,000 59,556,000 37,272,000 42,814,000 39,591,000 34,735,000 55,595,000 52,286,000 62,100,000 90,458,000 61,749,000 68,379,000 78,380,000 140,368,000 66,483,000 84,387,000 44,555,000 113,312,000 114,388,000 140,406,000 42,653,000 51,257,000 54,560,000 60,234,000 47,176,000 66,421,000 33,668,000 34,702,000 94,776,000 28,341,000 29,103,000 11,990,000 25,492,000 21,351,000 30,826,000 30,878,000 8,837,000 50,825,000 24,515,000 33,311,000 29,485,000 29,706,000 21,744,000 48,847,000 38,668,000 127,677,000 16,971,000 20,816,000 16,014,000 46,712,000 32,882,000 40,869,000 42,277,000 9,738,000 5,646,000 11,352,000 9,866,000 47,581,000 41,498,000 5,278,000 13,869,000 9,409,000 6,129,000 2,967,000 
        restricted cash
      45,642,000 45,553,000 45,620,000 45,617,000 45,675,000 45,566,000 45,641,000 45,403,000 45,449,000 45,375,000 34,315,000 34,069,000 34,153,000 22,925,000 22,984,000                                                       
        receivables:
                                                                           
        customers
      52,580,000 56,322,000 79,986,000 75,437,000 53,888,000 58,585,000 81,075,000 71,125,000 51,346,000 59,349,000 78,561,000 62,978,000 46,539,000 55,079,000 79,239,000 68,404,000 50,276,000 60,785,000 67,807,000 52,237,000 39,652,000 44,025,000 53,397,000 46,087,000 32,729,000 32,058,000 45,624,000 43,345,000 27,552,000 30,037,000 50,785,000 44,700,000 28,161,000 32,451,000 46,963,000 39,027,000 24,685,000 30,305,000 45,376,000 36,635,000 31,397,000 31,512,000 41,574,000 29,519,000 24,327,000 37,070,000 34,278,000 26,799,000 42,979,000  29,204,000 48,087,000 37,169,000 24,244,000 38,713,000 30,620,000 21,231,000 25,813,000 33,606,000 27,031,000 19,506,000 25,567,000 31,722,000 26,613,000 18,216,000 22,786,000 30,466,000 24,195,000 17,404,000 
        short-term regulatory accounts
      78,336,000                                                                     
        other
      47,464,000 49,004,000 19,418,000 28,109,000 32,818,000 33,976,000 20,254,000 17,110,000 18,074,000 16,431,000 21,766,000 22,664,000 20,576,000 20,932,000 22,496,000 19,803,000 18,065,000 18,452,000 20,448,000 19,469,000 19,470,000 20,331,000 15,056,000 13,605,000 14,428,000 14,187,000 16,977,000 17,616,000 19,460,000 17,101,000 20,903,000 19,859,000 21,216,000 16,464,000 16,438,000 17,322,000 17,394,000 17,158,000 14,199,000 11,901,000 12,741,000 14,760,000 14,369,000 14,279,000 13,349,000 15,759,000 13,825,000 19,878,000 9,802,000 14,335,000 11,577,000 12,277,000 7,888,000 5,474,000 19,408,000 6,148,000 9,349,000 5,386,000 5,699,000 6,036,000 6,829,000 9,043,000 10,752,000 7,687,000 10,146,000 12,071,000 10,031,000 4,771,000 5,357,000 
        accrued and unbilled revenue
      39,879,000 39,674,000 61,654,000 52,802,000 34,974,000 39,718,000 55,971,000                                                               
        materials and supplies
      19,637,000 19,784,000 20,069,000 19,879,000 20,283,000 20,511,000 19,872,000 17,645,000 16,934,000  15,454,000 13,862,000 13,287,000                                                         
        taxes, prepaid expenses, and other assets
      33,521,000 19,760,000 22,547,000 26,029,000 24,839,000 19,742,000 21,487,000 23,948,000 23,615,000 18,130,000 19,355,000 22,184,000 22,561,000 21,969,000 14,923,000 20,708,000 22,232,000 21,973,000 16,246,000 20,269,000 17,925,000 17,964,000 14,726,000 21,097,000 18,265,000 14,965,000 14,395,000 17,120,000 17,230,000 11,981,000 12,576,000 15,180,000 12,977,000 11,180,000 12,544,000 14,682,000 12,767,000 7,262,000 10,407,000 13,257,000  7,897,000                7,799,000    11,113,000    7,922,000    
        total current assets
      375,161,000 354,428,000 399,312,000 361,581,000 319,223,000 324,136,000 362,951,000 266,810,000 283,126,000 296,285,000 302,282,000 311,856,000 269,283,000 295,535,000 339,165,000 276,652,000 272,474,000 300,458,000 393,408,000 305,586,000 302,400,000 266,016,000 305,764,000 266,889,000 270,082,000 184,712,000 212,056,000 206,030,000 192,725,000 188,702,000 235,539,000 189,570,000 165,785,000 227,873,000 180,485,000 170,580,000 128,205,000 142,069,000 151,127,000 159,000,000 148,521,000 127,578,000 191,066,000 150,206,000 159,255,000 177,278,000 150,808,000 130,106,000 170,552,000 164,076,000 231,696,000 150,098,000 134,902,000 107,057,000 155,216,000 131,611,000 129,129,000 126,210,000 91,728,000 91,638,000 90,283,000 92,241,000 140,378,000 124,492,000 72,305,000 79,798,000 83,707,000 69,081,000 51,119,000 
        other assets:
                                                                           
        regulatory assets
      341,684,000 339,865,000 326,519,000 359,919,000 367,231,000 357,406,000 340,419,000 397,498,000 384,501,000 257,621,000 265,630,000 276,592,000 293,263,000 283,620,000 298,362,000 287,625,000 291,577,000 285,692,000 328,505,000 337,132,000 328,336,000 325,376,000 484,435,000 440,986,000 442,819,000 433,322,000 382,484,000 373,619,000 366,921,000 353,569,000 388,300,000 405,297,000 405,041,000 401,147,000 379,884,000 375,868,000 367,476,000 355,930,000 363,597,000 363,321,000 361,249,000 361,893,000 398,535,000 403,042,000 401,089,000 277,476,000 264,245,000 254,345,000 354,879,000 353,910,000 353,606,000 334,000,000 323,831,000 319,990,000 262,334,000 245,956,000 238,542,000 229,577,000 223,724,000 220,621,000 211,802,000 204,104,000 201,442,000 199,194,000 198,170,000 198,293,000 90,820,000 90,894,000 90,999,000 
        goodwill
      37,063,000 37,063,000 37,063,000 37,063,000 37,063,000 37,063,000 37,039,000 37,039,000 37,039,000 37,039,000 36,814,000 36,814,000 36,814,000 36,814,000 36,814,000 36,814,000 36,814,000 36,814,000 36,815,000 36,841,000 31,390,000 31,842,000 30,349,000 31,132,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 2,615,000 3,906,000 3,906,000 3,906,000 4,672,000   
        total other assets
      739,231,000 737,147,000 676,103,000 703,737,000 708,313,000 697,443,000 611,073,000 662,251,000 649,186,000 525,993,000 490,755,000 500,615,000 514,142,000 496,347,000 479,621,000 471,424,000 479,352,000 475,951,000 489,912,000 496,561,000 484,131,000 477,674,000 604,356,000 555,228,000 523,792,000 520,226,000 467,944,000 456,360,000 448,378,000 416,279,000 455,581,000 469,680,000 467,684,000 464,537,000 440,695,000 433,834,000 424,088,000 410,399,000 417,165,000 414,046,000 411,605,000 416,749,000 451,889,000 456,167,000 454,868,000 331,117,000 319,863,000 309,364,000 407,659,000 404,277,000 404,069,000 382,609,000 364,006,000 360,841,000 298,498,000 285,946,000 277,617,000 271,559,000 259,801,000 255,330,000 244,986,000 235,263,000 234,513,000 233,381,000 227,224,000 225,942,000 118,446,000 114,683,000 113,767,000 
        total assets
      5,779,749,000 5,671,165,000 5,519,417,000 5,399,929,000 5,257,751,000 5,180,283,000 5,014,908,000 4,871,242,000 4,780,834,000 4,595,533,000 4,041,361,000 3,990,201,000 3,886,862,000 3,850,752,000 3,806,398,000 3,682,752,000 3,639,241,000 3,623,271,000 3,679,689,000 3,548,753,000 3,471,467,000 3,394,248,000 3,506,434,000 3,359,933,000 3,240,845,000 3,111,308,000 3,023,254,000 2,964,595,000 2,900,662,000 2,837,704,000 2,876,862,000 2,789,514,000 2,716,507,000 2,740,375,000 2,603,104,000 2,533,026,000 2,440,298,000 2,411,745,000 2,386,043,000 2,358,123,000 2,299,805,000                             
        capitalization and liabilities
                                                                           
        capitalization:
                                                                           
        common stock, 0.01 par value...
      599,000 596,000 596,000 596,000 596,000 595,000 595,000 588,000 578,000 577,000 577,000 577,000 560,000 556,000 548,000 544,000 538,000 537,000 526,000 515,000 508,000 503,000 498,000 494,000 487,000 485,000 481,000 481,000 481,000 481,000 481,000 481,000 481,000 480,000 480,000 480,000 480,000 480,000 480,000 480,000  479,000                208,000    208,000    207,000    
        additional paid-in capital
      980,113,000 973,454,000 970,960,000 968,820,000 967,689,000 966,975,000 965,278,000 929,376,000 876,894,000 876,583,000 875,640,000 873,923,000 777,605,000 760,336,000 711,004,000 682,353,000 650,499,000 651,121,000 580,760,000 512,484,000 471,698,000 448,632,000 422,391,000 400,080,000 368,129,000 362,275,000 341,988,000 340,274,000 338,728,000 337,623,000 336,960,000 336,238,000 335,625,000 336,229,000 335,516,000 334,834,000 334,220,000 334,856,000 334,213,000 333,561,000 333,002,000 333,135,000 332,290,000 331,574,000 331,029,000 329,840,000 329,332,000 328,826,000 327,890,000 327,628,000 327,178,000 220,642,000 220,294,000 219,909,000 219,237,000 217,937,000 217,813,000 217,517,000 217,147,000 216,063,000 215,800,000 215,528,000 214,715,000 214,451,000 214,236,000 213,922,000 213,596,000 213,462,000 211,976,000 
        retained earnings
      713,333,000 729,276,000 735,673,000 692,319,000 668,023,000 674,918,000 671,913,000 627,705,000 603,326,000 549,573,000 534,451,000 515,016,000 520,031,000 556,698,000 561,907,000 519,625,000 513,593,000 525,936,000 534,685,000 484,119,000 457,596,000 472,209,000 467,303,000 381,449,000 386,524,000 417,146,000 415,326,000 382,409,000 374,920,000 392,053,000 374,593,000 349,213,000 345,205,000 356,753,000 351,727,000 326,520,000 316,633,000 324,135,000 317,319,000 302,719,000 299,485,000 308,541,000 308,083,000 290,983,000 289,158,000 291,964,000 266,082,000 256,680,000 271,887,000 250,375,000 244,502,000 253,875,000 230,702,000 224,337,000 234,400,000 219,885,000 214,113,000 217,801,000 219,127,000 204,930,000 200,738,000 204,898,000 204,570,000 191,098,000 185,128,000 188,820,000 187,565,000 171,728,000 167,710,000 
        accumulated other comprehensive loss
      -13,537,000 -13,922,000 -6,755,000 -6,909,000 -7,063,000 -7,217,000 -9,197,000 -13,068,000 -13,366,000                                                             
        noncontrolling interest
      2,604,000 2,571,000 2,421,000 2,443,000 2,744,000 3,015,000                                                                
        total equity
      1,683,112,000 1,691,975,000 1,702,895,000 1,657,269,000 1,631,989,000 1,638,286,000 1,631,632,000 1,547,691,000 1,470,837,000 1,430,312,000 1,414,995,000 1,393,967,000 1,302,988,000 1,322,394,000 1,278,332,000 1,207,306,000 1,169,878,000 1,182,980,000 1,120,660,000 1,002,263,000                                                  
        long-term debt
      1,472,034,000 1,471,968,000 1,103,819,000 1,104,046,000 1,104,373,000 1,104,571,000 1,051,585,000 1,051,792,000 1,052,099,000 1,052,768,000 1,051,846,000 1,052,070,000 1,052,337,000 1,052,487,000 1,053,944,000 1,054,170,000 1,055,638,000 1,055,794,000 1,059,724,000 1,059,936,000 780,951,000 781,100,000 785,055,000 785,257,000 786,467,000 786,754,000 807,478,000 807,693,000 710,602,000 710,027,000                                        
        total capitalization
      3,155,146,000 3,163,943,000 2,806,714,000 2,761,315,000 2,736,362,000 2,742,857,000 2,683,217,000 2,599,483,000 2,522,936,000 2,483,080,000 2,466,841,000 2,446,037,000 2,355,325,000 2,374,881,000 2,332,276,000 2,261,476,000 2,225,516,000 2,238,774,000 2,180,384,000 2,062,199,000 1,710,753,000 1,702,444,000 1,675,247,000 1,567,280,000 1,541,607,000 1,566,660,000 1,565,273,000 1,530,857,000 1,424,731,000 1,440,184,000 1,426,344,000 1,100,462,000 1,196,981,000 1,209,255,000 1,207,423,000 1,181,709,000 1,173,048,000 1,191,216,000 1,207,548,000 1,192,547,000 1,190,816,000 1,154,442,000 1,057,299,000 1,039,815,000 1,039,680,000 1,045,107,000 1,019,226,000 1,011,714,000 1,030,481,000 1,009,185,000 1,006,310,000 954,396,000 931,373,000 925,750,000 931,614,000 916,208,000 911,109,000 914,707,000 816,767,000 801,218,000 797,794,000 794,903,000 793,033,000 789,256,000 686,773,000 690,447,000 690,031,000 677,153,000 671,863,000 
        current liabilities:
                                                                           
        current maturities of long-term debt
      821,000 2,270,000 72,490,000 72,467,000 72,445,000 72,422,000 890,000 1,183,000 1,176,000 672,000 1,823,000 1,825,000 3,300,000 3,310,000 5,790,000 5,783,000 5,205,000 5,192,000 5,180,000 5,173,000 5,136,000 5,127,000 21,883,000 21,872,000 21,864,000 21,868,000 5,280,000 5,312,000 105,010,000 104,911,000 104,812,000 105,024,000 5,924,000 15,920,000 36,015,000 36,110,000 36,139,000 26,208,000 6,130,000 6,133,000 6,113,000 6,600,000 6,565,000 6,556,000 6,596,000 6,619,000 6,550,000 7,860,000 48,013,000 48,040,000 46,743,000 6,677,000 6,684,000 6,649,000 2,392,000 2,377,000 2,367,000 2,380,000 2,374,000 2,923,000 12,987,000 12,953,000 12,424,000 2,664,000 2,891,000 2,818,000 2,701,000 2,701,000 2,701,000 
        short-term borrowings
      230,000,000 130,000,000 345,000,000 360,000,000 285,000,000 205,000,000 260,000,000 245,000,000 280,000,000 180,000,000 115,000,000 130,000,000 130,000,000 70,000,000 70,000,000 70,000,000 50,000,000 35,000,000 120,000,000 145,000,000 435,000,000 370,000,000 375,100,000 375,100,000 335,100,000 175,100,000 155,100,000 165,100,000 125,100,000 65,100,000 75,100,000 325,100,000 275,100,000 275,100,000 195,100,000 190,100,000 130,100,000 97,100,000 57,100,000 75,100,000 34,500,000 33,615,000 136,615,000 126,615,000 109,115,000 61,715,000 81,215,000 64,015,000 11,515,000 28,815,000 93,275,000 60,675,000 87,775,000 50,790,000 39,860,000 32,760,000 28,860,000 23,750,000 56,250,000 55,150,000 19,100,000 12,000,000 12,000,000 12,000,000 52,000,000 40,000,000 40,000,000 23,000,000 14,000,000 
        accounts payable
      164,802,000 175,729,000 188,176,000 166,958,000 141,295,000 167,533,000 171,501,000 143,533,000 119,839,000 157,305,000 152,869,000 138,272,000 120,198,000 140,986,000 157,911,000 139,732,000 140,832,000 144,369,000 148,415,000 132,972,000 120,549,000 131,725,000 127,158,000 128,216,000 99,019,000 108,463,000 108,593,000 97,376,000 83,280,000 95,580,000 102,938,000 93,032,000 73,556,000 93,955,000 89,394,000 84,222,000 69,276,000 77,813,000 84,052,000 77,604,000 65,354,000 66,380,000 77,261,000 68,677,000 57,684,000 71,867,000 70,906,000 50,731,000 60,414,000 57,158,000 44,293,000 58,839,000 54,610,000 50,408,000 58,554,000 51,647,000 36,135,000 39,505,000 47,827,000 48,830,000 43,058,000 43,689,000    41,772,000 45,616,000 46,925,000 26,653,000 
        accrued other taxes
      7,460,000 6,048,000 17,886,000 3,065,000 6,708,000 6,084,000    4,591,000    8,607,000    5,379,000    4,477,000    4,445,000    4,182,000    3,888,000    3,629,000    3,417,000                3,079,000    4,369,000    2,776,000    
        accrued interest
      23,471,000 12,976,000 19,478,000 8,980,000 19,829,000 8,406,000 17,131,000 6,666,000 18,332,000 6,625,000 17,589,000 7,164,000 16,790,000 6,490,000 17,338,000 6,740,000 17,116,000 6,542,000 17,170,000 6,853,000 14,728,000 6,178,000 14,233,000 5,330,000 14,545,000 5,810,000 14,410,000 6,311,000 12,181,000 5,674,000 13,111,000 5,751,000 12,342,000 6,122,000 12,763,000 5,842,000 12,583,000 5,661,000 12,733,000 5,820,000 11,611,000 5,088,000 9,678,000 4,212,000 9,583,000 9,748,000 4,240,000 9,828,000 10,656,000 4,608,000 11,003,000 11,046,000 4,765,000 11,003,000 10,996,000 4,689,000 11,020,000 4,651,000 8,991,000 4,033,000 9,101,000 4,258,000 9,096,000 4,013,000 6,757,000 3,295,000    
        other accrued liabilities
      66,809,000 65,683,000 63,446,000 56,969,000 59,698,000 56,271,000    59,606,000    53,017,000    42,547,000    36,563,000    38,573,000    33,506,000    36,671,000    35,060,000    31,128,000                30,958,000    30,659,000    32,535,000    
        total current liabilities
      544,957,000 418,164,000 729,919,000 686,080,000 604,084,000 538,364,000 570,729,000 512,500,000 507,883,000 430,339,000 381,140,000 362,657,000 350,304,000 294,650,000 322,547,000 286,083,000 281,817,000 256,576,000 360,938,000 362,379,000 655,466,000 588,706,000 603,823,000 577,552,000 513,127,000 358,721,000 333,944,000 331,389,000 384,043,000 321,166,000 381,890,000 622,300,000 464,317,000 490,959,000 380,361,000 361,027,000 293,373,000 250,230,000 203,981,000 202,013,000 158,143,000 148,455,000 300,770,000 270,415,000 253,943,000 215,414,000 222,074,000 192,239,000 197,013,000 196,210,000 256,754,000 190,234,000 210,747,000 164,518,000 160,725,000 131,626,000 117,505,000 107,348,000 155,539,000 145,744,000 119,406,000 110,358,000 130,838,000 101,210,000 130,074,000 123,196,000 146,049,000 112,877,000 78,672,000 
        deferred income taxes
      452,591,000 450,946,000 407,562,000 422,779,000 416,230,000 411,083,000 365,598,000 363,597,000 369,600,000 352,762,000 332,869,000 327,856,000 326,401,000 330,251,000 312,193,000 300,489,000 298,690,000 298,945,000 284,193,000 278,957,000 275,987,000 276,032,000 245,456,000 223,955,000 218,451,000 222,590,000 229,237,000 216,880,000 211,382,000 213,033,000 199,143,000 196,109,000 192,313,000 192,946,000 329,506,000 310,936,000 299,464,000 298,924,000 282,973,000 271,407,000 264,153,000 264,897,000 236,443,000 221,333,000 214,814,000 210,357,000 180,956,000 179,369,000 168,091,000 167,611,000 158,037,000 164,245,000 116,340,000 119,069,000 124,998,000 120,046,000 114,720,000 107,084,000 103,866,000 94,463,000 90,806,000 91,851,000 83,512,000 76,008,000 74,283,000 72,344,000 69,948,000 67,536,000 68,001,000 
        regulatory liabilities
      915,692,000 929,814,000 870,620,000 845,657,000 826,595,000 814,551,000 734,925,000 742,842,000  683,717,000    213,679,000    180,428,000    180,718,000    211,413,000    211,275,000    179,706,000    38,735,000    35,264,000                17,079,000    19,669,000    20,728,000    
        pension
      94,733,000 94,226,000 82,427,000 82,166,000 82,007,000 81,665,000 83,412,000 83,266,000 83,252,000 82,920,000 80,674,000 80,008,000 79,245,000 78,443,000 96,063,000 94,796,000 93,544,000 92,287,000                                                    
        advances for construction
      212,175,000 210,638,000 210,412,000 207,730,000 202,423,000 202,614,000 201,417,000 199,640,000 197,955,000 199,448,000 200,716,000 200,213,000 199,305,000 199,832,000 199,277,000 198,674,000 198,200,000 198,086,000 198,344,000 197,687,000 197,715,000 195,625,000 196,853,000 195,056,000 194,046,000 191,062,000 190,272,000 189,642,000 186,877,000 186,342,000 186,897,000 185,286,000 184,479,000 182,502,000 182,820,000 182,394,000 182,815,000 182,448,000 182,001,000 180,429,000 180,210,000 180,172,000 180,805,000 181,615,000 181,553,000 182,172,000 181,443,000 182,042,000 184,879,000 186,202,000 186,242,000 188,249,000 188,001,000 185,829,000 187,146,000 187,277,000 186,388,000 186,899,000 187,646,000 188,015,000 186,045,000 185,027,000 182,763,000 179,566,000 177,684,000 176,163,000 177,056,000 173,221,000 168,822,000 
        contributions in aid of construction
      297,719,000 297,016,000 295,649,000 294,867,000 293,956,000 294,970,000 292,540,000 289,820,000 290,043,000 286,491,000 289,990,000 289,934,000 287,771,000 285,401,000 287,431,000 287,125,000 287,827,000 285,665,000 284,530,000 279,621,000 267,769,000 268,050,000 266,920,000 264,794,000 242,785,000 241,537,000 238,510,000 228,675,000 226,472,000 225,270,000 189,794,000 188,290,000 187,586,000 186,721,000 182,371,000 181,155,000 180,631,000 180,790,000 179,613,000 178,891,000 177,429,000 177,577,000 175,932,000 169,375,000 170,130,000 169,126,000 168,819,000 167,583,000 162,269,000 160,638,000 157,971,000 154,986,000 155,303,000 154,592,000 155,342,000 154,587,000 135,587,000 136,356,000 133,346,000 132,888,000 131,411,000 118,217,000 121,112,000 119,058,000 117,794,000 117,568,000 118,671,000 118,592,000 117,833,000 
        other long-term liabilities
      106,736,000 106,418,000    94,179,000    76,776,000    73,615,000    72,510,000    67,092,000    58,843,000    45,247,000    44,421,000    44,913,000    47,150,000                30,682,000    31,736,000    28,368,000    
        commitments and contingencies
                                                                           
        total capitalization and liabilities
      5,779,749,000 5,671,165,000 5,519,417,000 5,399,929,000 5,257,751,000 5,180,283,000 5,014,908,000 4,871,242,000 4,780,834,000 4,595,533,000 4,041,361,000 3,990,201,000 3,886,862,000 3,850,752,000 3,806,398,000 3,682,752,000 3,639,241,000 3,623,271,000 3,679,689,000 3,548,753,000 3,471,467,000 3,394,248,000 3,506,434,000 3,359,933,000 3,240,845,000 3,111,308,000 3,023,254,000 2,964,595,000 2,900,662,000 2,837,704,000 2,876,862,000 2,789,514,000 2,716,507,000 2,740,375,000 2,603,104,000 2,533,026,000 2,440,298,000 2,411,745,000 2,386,043,000 2,358,123,000 2,299,805,000                             
        land
       64,379,000    56,621,000    47,002,000    45,861,000    45,047,000    45,672,000    45,047,000    44,019,000    42,517,000    40,283,000    42,264,000                21,355,000    19,422,000    19,058,000    
        depreciable plant and equipment
       5,471,263,000    4,977,217,000    4,557,964,000    4,215,619,000    3,899,629,000    3,645,770,000    3,235,415,000    2,950,424,000    2,729,757,000    2,522,174,000    2,301,841,000                1,695,075,000    1,575,756,000    1,464,904,000    
        construction work in progress
       333,824,000    329,439,000    287,596,000    247,013,000    222,713,000    171,414,000    245,169,000    210,260,000    175,693,000    132,957,000    141,622,000                103,214,000    89,908,000    80,649,000    
        intangible assets
       39,776,000    37,212,000    32,921,000    27,779,000    29,955,000    27,567,000    24,854,000    24,743,000    22,212,000    21,925,000    21,219,000                24,122,000    23,976,000    18,468,000    
        total utility plant
       5,909,242,000    5,400,489,000    4,925,483,000    4,536,272,000    4,197,344,000    3,890,423,000    3,550,485,000    3,229,446,000    2,970,179,000    2,717,339,000    2,506,946,000                1,843,766,000    1,709,062,000    1,583,079,000    
        regulatory balancing accounts
       72,511,000 74,028,000 63,169,000 62,286,000 55,917,000 59,095,000 5,495,000 56,125,000 64,240,000 52,918,000 61,333,000 50,335,000 66,826,000 54,654,000 56,625,000 68,043,000 78,597,000 85,027,000 84,585,000 97,820,000 96,241,000 54,415,000 23,738,000 24,970,000 38,225,000 33,437,000 33,466,000 37,130,000 42,394,000 37,973,000 33,257,000 34,119,000 36,783,000 31,364,000 29,071,000 30,661,000 30,332,000 19,811,000 26,453,000 31,554,000 35,052,000 38,112,000 42,941,000 50,016,000 45,073,000 26,978,000 28,547,000 27,047,000 25,560,000 29,607,000 33,171,000 25,100,000 24,842,000 11,065,000 13,085,000 15,004,000 14,784,000 6,898,000 8,219,000 11,772,000 10,513,000 15,592,000 12,612,000 8,860,000     
        contingencies and commitments
                                                                           
        noncontrolling interests
            3,043,000 3,090,000 3,405,000 3,579,000 4,327,000 4,451,000 4,792,000 4,804,000 4,873,000 4,784,000 5,248,000 5,386,000 4,689,000 5,145,000                                                  
        accrued expenses and other liabilities
            97,074,000 103,364,000 71,892,000  67,401,000 56,119,000 62,744,000  61,824,000 54,201,000 56,649,000  50,900,000 47,542,000 45,838,000  54,446,000 45,432,000 39,125,000  43,674,000 39,435,000 38,488,000  42,629,000 37,076,000 41,189,000  42,544,000 38,010,000 37,078,000  41,129,000 34,654,000 39,490,000  68,781,000 61,708,000 65,385,000 58,674,000 52,560,000 53,675,000 64,716,000 52,872,000 55,308,000 47,464,000 52,658,000 42,279,000 47,423,000 37,856,000 36,562,000  39,511,000 33,905,000 33,056,000  42,938,000 34,189,000 30,438,000   40,251,000 35,318,000 
        accrued unbilled revenue
             48,812,000                                                              
        unbilled revenue
              28,769,000 36,999,000 45,178,000 39,171,000 29,546,000 33,140,000 43,417,000 38,796,000 34,953,000 32,760,000 54,129,000 52,954,000 33,945,000 34,069,000 46,247,000 39,599,000 31,149,000 34,879,000 42,562,000 32,934,000 24,675,000 33,427,000 40,318,000 36,192,000 28,132,000 29,756,000 38,491,000 34,857,000 24,303,000 25,228,000 33,727,000 33,535,000 25,522,000 23,181,000 31,276,000 25,985,000 22,599,000 29,489,000 28,055,000 14,594,000 25,815,000 24,750,000 15,551,000 23,474,000 23,650,000 18,036,000 22,771,000 21,545,000 15,216,000 13,925,000 21,602,000 19,350,000 12,321,000 13,417,000 21,352,000 20,273,000 12,472,000 13,112,000 19,896,000 16,948,000 11,368,000 
        regulatory liabilities and other
              809,165,000  289,131,000 283,496,000 288,511,000  256,611,000 254,109,000 253,647,000  257,108,000 255,017,000 251,851,000  257,054,000 270,177,000 268,917,000  260,812,000 264,027,000 264,555,000  255,569,000 238,912,000 232,587,000  91,006,000 86,821,000 84,318,000  90,714,000 92,141,000 88,018,000  76,799,000 81,873,000                          
        materials and supplies at weighted-average cost
               16,170,000    12,564,000 10,994,000 10,567,000 10,526,000 9,511,000 9,383,000 9,589,000 9,201,000 8,831,000 8,611,000 8,375,000 8,135,000 7,745,000 7,804,000 6,989,000 6,444,000 6,586,000 6,563,000 6,714,000 6,478,000 6,463,000 6,344,000 6,518,000 6,405,000 6,292,000 6,256,000 6,393,000 6,321,000 6,339,000   6,158,000 5,912,000 5,952,000 5,966,000 5,689,000 5,720,000 5,687,000   5,827,000   6,072,000 6,058,000 5,925,000  5,807,000 5,530,000 5,457,000   5,070,000 4,914,000   
        other assets
                188,311,000 187,209,000 184,065,000  144,445,000 146,985,000 150,961,000  124,592,000 122,588,000 124,405,000  89,572,000 83,110,000 78,358,000  82,845,000 80,126,000 78,842,000  64,666,000 61,768,000 60,028,000  58,196,000 55,351,000 53,997,000  50,953,000 48,110,000 47,741,000  50,739,000 50,510,000 51,164,000 51,026,000 53,003,000 52,404,000 50,165,000 47,752,000 47,848,000 45,994,000 37,560,000 38,236,000 33,549,000 37,375,000 36,460,000  33,462,000 32,094,000 30,569,000  30,456,000 30,281,000 25,148,000  22,954,000 23,789,000 22,768,000 
        pension and postretirement benefits other than pensions
                        114,192,000 112,893,000 111,926,000 115,581,000 261,081,000 261,119,000 260,337,000 258,907,000 203,557,000 201,476,000 200,953,000 193,538,000 235,501,000 256,431,000 256,520,000 252,141,000 227,819,000 227,186,000 224,851,000 222,691,000 237,341,000 238,823,000 239,164,000  276,525,000 276,591,000 277,094,000 153,085,000 145,426,000 145,836,000 247,335,000 248,003,000 248,385,000 234,432,000 234,948,000 235,465,000 162,307,000 162,439,000 163,087,000  143,619,000 143,543,000 143,723,000  152,467,000 152,468,000 150,074,000  39,747,000 39,747,000 39,444,000 
        total common stockholders’ equity
                          929,802,000  890,192,000 782,023,000 755,140,000  757,795,000 723,164,000 714,129,000  712,034,000 685,932,000 681,311,000  687,723,000 661,834,000 651,333,000  652,012,000 636,760,000 632,967,000  640,852,000 623,036,000 620,666,000 622,282,000 595,892,000 585,984,000 600,254,000 578,480,000 572,157,000 474,936,000 451,415,000 444,665,000 454,055,000 438,240,000 432,135,000 435,526,000 436,482,000 421,201,000 416,746,000 420,634,000 419,492,000 405,756,000 399,571,000 402,949,000 401,368,000 385,397,000 379,893,000 
        total common stockholders' equity
                           921,344,000    779,906,000    730,157,000    693,462,000    659,471,000    642,155,000                            
        unamortized investment tax credits
                              1,575,000 1,575,000 1,649,000 1,649,000 1,649,000 1,649,000 1,724,000 1,724,000 1,724,000 1,724,000 1,798,000 1,798,000 1,798,000 1,798,000 1,872,000 1,872,000 1,872,000 1,872,000 1,947,000 2,032,000 2,032,000 2,106,000 2,106,000 2,106,000 2,180,000 2,180,000 2,180,000 2,254,000 2,254,000 2,254,000 2,328,000 2,244,000 2,244,000 2,244,000 2,318,000 2,318,000 2,318,000 2,318,000 2,392,000 2,392,000 2,392,000 2,392,000 2,467,000 2,467,000 2,467,000 
        receivables: net of allowance for doubtful accounts of 771 and 757 in 2019 and 2018, respectively
                                                                           
        receivables: net of allowance for doubtful accounts of 757 and 773 in 2018 and 2017, respectively
                                                                           
        long-term debt, less current maturities
                                    714,310,000 414,530,000 515,670,000 515,793,000 519,700,000 519,875,000 521,715,000 531,745,000 555,536,000 555,787,000 557,849,000 512,287,000 416,447,000 416,779,000 419,014,000 422,825,000 423,334,000 425,730,000 430,227,000 430,705,000 434,153,000 479,460,000 479,958,000 481,085,000 477,559,000 477,968,000 478,974,000 479,181,000 380,285,000 380,017,000 381,048,000 374,269,000 373,541,000 383,500,000 287,202,000 287,498,000 288,663,000 288,281,000 288,495,000 
        receivables: net of allowance for doubtful accounts of 773 and 830 in 2017 and 2016, respectively
                                                                           
        receivables: net of allowance for doubtful accounts of 830 and 730 in 2016 and 2015, respectively
                                                                           
        taxes, prepaid expense, and other assets
                                              10,108,000  8,823,000 6,889,000                          
        common stock, .01 par value...
                                              480,000  479,000 479,000 479,000 478,000 478,000 478,000 477,000 477,000 477,000   419,000   209,000             
        receivables: net of allowance for doubtful accounts of 730 and 697 in 2015 and 2014, respectively
                                                                           
        unamortized debt premium and expense
                                               4,842,000                6,489,000    4,756,000    6,070,000    
        pension and postretirement benefits other than pension
                                               236,266,000                155,224,000    137,127,000    152,685,000    
        materials and supplies at average cost
                                                6,087,000 6,078,000        6,029,000 6,066,000  5,778,000 6,064,000    5,702,000    5,244,000 5,068,000   4,671,000 4,779,000 
        taxes, prepaid expenses and other assets
                                                  9,495,000 14,490,000 12,014,000 12,578,000 10,373,000 13,550,000 12,393,000 10,089,000 14,213,000 12,620,000 10,769,000 21,267,000 21,388,000  8,260,000 19,654,000 22,696,000  7,922,000 10,565,000 12,265,000   12,367,000 9,244,000 
        regulatory and other liabilities
                                                  81,499,000 91,713,000 90,134,000 81,699,000 91,185,000 88,578,000 88,476,000 87,037,000 79,196,000 81,042,000 76,692,000 70,726,000 84,471,000  88,839,000 92,243,000 90,946,000  83,357,000 83,282,000 83,234,000   40,235,000 40,113,000 
        receivables: net of allowance for doubtful accounts of 815 as of september 30, 2013 and 714 as of december 31, 2012
                                                                           
        receivables: net of allowance for doubtful accounts of 714 for both periods presented customers
                                                       41,493,000                    
        common stock
                                                         419,000 419,000  418,000 418,000   208,000 208,000 208,000  207,000 207,000 207,000  207,000 207,000 207,000 
        receivables: net of allowance for doubtful accounts of 804 and 847, respectively
                                                                           
        prepaid income taxes
                                                               10,168,000    7,192,000    4,968,000    
        mtbe settlement
                                                               34,443,000    34,375,000    34,216,000    
        accounts receivable
                                                                           
        accounts payable:
                                                                           
        trade and other
                                                                    46,894,000 42,267,000 36,153,000     
        preferred stock without mandatory redemption provision, 25 par value, 380 shares authorized, -0- and 139, outstanding in 2008 and 2007, respectively
                                                                           
        taxes, prepaid expenses and other current assets
                                                                        8,991,000   
        capitalization and liabilities capitalization:
                                                                           
        preferred stock
                                                                         3,475,000 3,475,000 
        accrued expenses and other current liabilities
                                                                        57,732,000   
        regulatory and other long-term liabilities
                                                                        47,076,000   
      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 2014-09-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-09-30 2012-06-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 
                                                                             
          operating activities:
                                                                             
          net income
        4,037,000 11,480,000 61,116,000 42,050,000 13,202,000 19,464,000 60,554,000 40,377,000 69,690,000 29,938,000 34,325,000 9,447,000 -22,334,000 19,471,000 55,683,000 19,215,000 894,000 3,436,000 62,499,000   15,497,000 96,360,000   11,336,000 42,424,000   20,715,000 34,392,000 13,022,000 -2,545,000 13,669,000 33,849,000 18,531,000 1,132,000 15,090,000 22,875,000 11,508,000 -798,000 8,477,000 25,120,000 9,845,000 1,575,000 33,650,000   29,151,000 13,510,000 -1,073,000 29,772,000 12,965,000 1,085,000 20,935,000 12,190,000 2,719,000 4,871,000 20,386,000 10,381,000 2,018,000 6,451,000 19,592,000 12,090,000 2,421,000 7,318,000 22,185,000 10,117,000 185,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                             
          depreciation and amortization
        40,290,000 36,798,000 36,659,000 36,572,000 36,494,000 33,598,000 33,612,000 33,528,000 33,401,000 31,993,000 30,387,000 30,311,000 30,433,000 28,876,000 29,556,000 29,450,000 29,482,000 27,908,000 27,940,000 28,064,000 27,669,000 25,385,000 25,299,000 25,158,000 25,093,000 22,766,000 22,778,000 22,851,000 22,893,000 21,576,000 21,549,000 21,375,000 21,207,000 19,576,000 19,688,000 19,670,000 19,658,000 16,257,000 16,245,000 16,247,000 16,454,000 15,776,000 15,754,000 15,916,000 15,736,000 15,319,000 16,598,000 16,564,000 14,979,000 14,978,000 15,110,000 14,168,000 14,144,000 14,410,000 13,176,000 12,823,000 13,014,000 10,677,000 11,731,000 11,452,000 11,405,000 9,465,000 10,564,000 10,822,000 10,792,000 9,763,000 11,224,000 9,276,000 9,222,000 
          change in value of life insurance contracts
        315,000 -785,000 -1,842,000 -901,000 -356,000 1,343,000 -3,110,000 -144,000 -1,667,000 -4,207,000 1,908,000 -979,000 -1,641,000 -2,158,000 2,150,000 4,251,000 2,918,000 -1,703,000 178,000 -1,926,000 -349,000 -3,672,000 -1,493,000 -3,845,000 4,717,000 -1,671,000 -286,000 -893,000 -2,254,000 2,210,000 -693,000 -320,000 1,137,000 -1,187,000 -663,000 -889,000 -319,000 -111,000 -579,000 -379,000 43,000 -540,000 708,000              -454,000 -1,333,000 -1,391,000 682,000 -599,000 -552,000 -1,728,000 -1,819,000 -8,000     
          allowance for equity funds used during construction
        -2,079,000 -1,869,000 -2,145,000 -1,898,000 -1,797,000 -1,650,000 -1,691,000 -1,819,000 -1,742,000 -1,405,000 -1,387,000 -1,355,000 -1,404,000 -1,106,000 -1,004,000 -1,042,000 -975,000 -896,000 -898,000 -848,000 -544,000 -684,000 -973,000 -1,705,000 -1,614,000 -1,598,000 -1,868,000 -1,686,000 -1,533,000 -1,310,000 -1,023,000 -710,000 -911,000 -987,000 -1,105,000 -879,000 -779,000                                 
          changes in operating assets and liabilities:
                                                                             
          receivables and accrued and unbilled revenue
        -10,006,000  7,049,000 -38,005,000 -2,537,000                                                                 
          accounts payable
        -148,000 -27,050,000 16,245,000 12,017,000 -21,044,000 -8,310,000 20,598,000 9,498,000 -20,043,000 1,031,000 9,701,000 10,394,000 -11,230,000 -8,681,000 12,171,000 501,000 -11,617,000 -24,000 1,945,000 5,363,000 -10,222,000 -6,826,000 3,794,000 10,784,000 -7,379,000 -6,016,000 10,807,000 10,161,000 -4,233,000 -13,432,000 11,716,000 13,432,000 -7,015,000 -5,148,000 3,470,000 8,777,000 -5,535,000 -5,101,000 4,195,000 9,874,000 -5,129,000 -8,064,000 5,787,000   -5,563,000 12,624,000 178,000 -1,068,000   4,187,000 8,545,000 334,000 4,757,000 14,407,000 -4,153,000 -4,016,000 -1,091,000 6,095,000 -768,000 -14,221,000 5,645,000 8,373,000 1,543,000 -4,049,000 4,342,000 5,223,000 -2,906,000 
          other current assets
        -6,664,000  3,389,000 -744,000 -4,788,000  369,000 -652,000 -6,028,000  1,201,000 -215,000 -1,342,000  2,875,000 493,000 -75,000  4,235,000 -2,429,000 -152,000  6,223,000 -2,991,000 -3,768,000  1,813,000 -723,000 -5,027,000  2,815,000 -2,480,000 -1,727,000  2,405,000 -1,689,000 -5,359,000  3,017,000 -3,032,000 -1,728,000                -3,350,000  8,168,000 3,184,000 -4,693,000  9,590,000 -6,298,000 1,280,000  -238,000 108,000 -35,000 
          other current liabilities
        12,626,000 -16,732,000 31,526,000 -17,918,000 14,262,000 -33,804,000 29,257,000 -10,095,000 17,409,000 -15,137,000 21,619,000 -16,852,000 10,024,000 -14,506,000 22,131,000 -12,340,000 12,656,000 -15,400,000 13,466,000 -9,292,000 12,367,000 -22,401,000 17,274,000 -4,286,000 3,316,000 -10,315,000 11,993,000 -5,664,000 5,268,000 -13,144,000 12,930,000 -10,553,000 6,385,000 -8,775,000 11,686,000 -5,831,000 5,084,000 -9,926,000 13,627,000 -10,098,000 10,453,000 -13,045,000 8,275,000 -3,963,000 7,627,000   7,458,000 12,365,000 -1,971,000 10,164,000 865,000 3,871,000 5,845,000 16,558,000 -4,949,000 8,684,000 -9,815,000 10,564,000 -4,218,000 2,871,000 -12,955,000 13,832,000 1,009,000 -1,152,000 -18,574,000 16,689,000 4,933,000 5,061,000 
          other changes in noncurrent assets and liabilities
        11,016,000 -12,849,000 15,292,000 17,773,000 4,985,000 -8,481,000 34,820,000 -20,926,000 -86,028,000 -52,175,000 12,109,000 5,076,000 1,375,000 -28,889,000 25,742,000 16,623,000 10,153,000 -20,859,000 22,176,000 10,115,000 -2,023,000 -46,549,000 -34,665,000 1,017,000 -3,252,000 -21,338,000 10,108,000 3,974,000 7,520,000 -18,635,000 -7,714,000 7,422,000 6,283,000 -22,326,000 22,150,000 14,708,000 4,979,000 -27,587,000 17,540,000 11,605,000 4,604,000 -22,866,000 24,846,000 2,095,000 6,535,000 -10,788,000   12,151,000     2,802,000 -6,902,000 237,000 8,388,000 1,017,000 3,716,000 -4,227,000 3,219,000 -8,287,000 8,246,000 4,215,000 -486,000     
          net cash from operating activities
        49,387,000 47,905,000 167,289,000 48,946,000 38,421,000 68,085,000 101,843,000 94,424,000 26,515,000 74,309,000 105,987,000 16,551,000 20,970,000 43,931,000 109,931,000 35,717,000 54,193,000 52,560,000 111,508,000 37,671,000 29,979,000 21,260,000 76,660,000 15,937,000 4,067,000 40,451,000 84,952,000 23,250,000 20,141,000 59,516,000 69,932,000 21,319,000 28,252,000 38,054,000 74,062,000 21,429,000 14,297,000 36,508,000 64,129,000 28,037,000 31,026,000 28,107,000   26,889,000 56,983,000 32,711,000 10,473,000 65,123,000 17,227,000 19,549,000 67,308,000 9,181,000 22,916,000 50,057,000 23,091,000 24,576,000 -1,956,000 44,610,000 10,727,000 22,129,000 -4,739,000 46,603,000 19,082,000 11,478,000 14,715,000 48,264,000 15,509,000 17,242,000 
          capital expenditures
          
          free cash flows
        49,387,000 47,905,000 167,289,000 48,946,000 38,421,000 68,085,000 101,843,000 94,424,000 26,515,000 74,309,000 105,987,000 16,551,000 20,970,000 43,931,000 109,931,000 35,717,000 54,193,000 52,560,000 111,508,000 37,671,000 29,979,000 21,260,000 76,660,000 15,937,000 4,067,000 40,451,000 84,952,000 23,250,000 20,141,000 59,516,000 69,932,000 21,319,000 28,252,000 38,054,000 74,062,000 21,429,000 14,297,000 36,508,000 64,129,000 28,037,000 31,026,000 28,107,000   26,889,000 56,983,000 32,711,000 10,473,000 65,123,000 17,227,000 19,549,000 67,308,000 9,181,000 22,916,000 50,057,000 23,091,000 24,576,000 -1,956,000 44,610,000 10,727,000 22,129,000 -4,739,000 46,603,000 19,082,000 11,478,000 14,715,000 48,264,000 15,509,000 17,242,000 
          investing activities:
                                                                             
          utility plant expenditures
        -129,457,000 -152,289,000 -135,182,000 -119,417,000 -110,103,000 -138,636,000 -117,750,000 -104,608,000 -109,806,000 -109,618,000 -96,940,000 -95,209,000 -81,980,000 -105,669,000 -77,500,000 -76,092,000 -68,496,000 -85,446,000 -69,226,000 -71,705,000 -66,817,000 -77,390,000 -87,724,000 -68,267,000 -65,270,000 -78,828,000 -73,006,000 -62,055,000 -59,881,000 -58,851,000 -78,956,000 -63,250,000 -70,650,000 -78,752,000 -71,730,000 -56,859,000 -51,853,000 -62,532,000 -50,251,000 -59,692,000 -56,463,000 -58,524,000               -24,467,000 -24,585,000 -38,883,000 -34,337,000 -26,121,000         
          other
        1,000  207,000                                                               
          net cash from investing activities
        -129,456,000 -152,281,000 -138,546,000 -119,417,000 -109,896,000 -139,993,000 -120,511,000 -104,560,000 -109,806,000 -109,793,000 -102,335,000 -95,209,000 -82,082,000 -107,116,000 -77,500,000 -82,231,000 -68,676,000 -85,338,000 -71,561,000 -75,256,000 -68,717,000 -82,929,000 -91,948,000 -105,922,000 -65,270,000 -78,800,000 -75,222,000 -62,055,000 -59,881,000 -58,792,000 -80,390,000 -63,250,000 -70,650,000 -23,141,000 -73,435,000 -57,577,000 -52,499,000 -61,533,000 -51,928,000 -59,985,000 -57,393,000 -57,853,000               -26,142,000 -24,499,000 -35,938,000 -34,514,000 -27,663,000 -27,344,000 -33,578,000 -28,087,000 -25,706,000 -3,547,000 -51,613,000 -14,892,000 -29,825,000 
          financing activities:
                                                                             
          short-term borrowings
        160,000,000 130,000,000 10,000,000 240,000,000 170,000,000         55,000,000 40,000,000 25,000,000 30,000,000 20,000,000 55,000,000 20,000,000 105,000,000 65,000,000 100,000,000 170,000,000 50,000,000 20,000,000 130,000,000 60,000,000 10,000,000 30,000,000 65,978,000 45,022,000  45,000,000 105,000,000 35,000,000  2,000,000 48,600,000 54,500,000  30,000,000 22,500,000 30,000,000 60,500,000 17,200,000 22,200,000 2,700,000 28,815,000 3,800,000 2,930,000 56,985,000 5,650,000 7,100,000 3,900,000 5,110,000 14,500,000 28,100,000 36,050,000 7,100,000 8,000,000 12,000,000    14,000,000 
          repayment of short-term borrowings
        -60,000,000 -345,000,000 -25,000,000 -165,000,000 -90,000,000 -190,000,000 -60,000,000 -160,000,000 -70,000,000 -30,000,000 -55,000,000 -35,000,000 -55,000,000 -40,000,000 -5,000,000 -15,000,000 -105,000,000 -80,000,000 -310,000,000 -40,000,000 -70,100,000 -60,000,000 -10,000,000 -30,000,000 -30,000,000   -20,000,000 -280,000,000 -15,978,000 -45,022,000 -40,000,000 -45,000,000 -2,000,000 -20,000,000 -8,000,000 -53,615,000 -116,000,000                            
          repayment of long-term debt
        -230,000  -249,000 -216,000 -214,000  -263,000 -210,000 -206,000  -213,000 -1,119,000 -214,000  -262,000 -1,115,000 -198,000  -250,000 -1,096,000 -176,000  -242,000 -1,096,000 -197,000  -272,000 -401,132,000 -226,000  -235,000 -2,040,000 -10,224,000  -390,000 -2,121,000 -286,000  -402,000 -2,209,000 -254,000                  -345,000    -312,000 -4,956,000 -483,000     
          advances and contributions in aid of construction
        10,144,000 9,227,000 7,740,000 11,045,000 9,497,000 11,265,000 8,188,000 6,414,000 4,522,000 4,449,000 7,578,000 5,433,000 3,696,000 7,037,000 5,643,000 5,368,000 7,774,000 6,508,000 7,710,000 7,484,000 6,469,000 7,430,000 7,293,000 6,137,000 6,432,000 6,508,000 8,511,000 6,711,000 6,044,000 4,982,000 5,245,000 3,622,000 4,763,000 6,405,000 4,652,000 6,337,000 3,975,000 3,262,000 6,723,000 3,855,000 7,608,000 5,285,000 3,820,000 5,144,000 1,777,000 2,830,000 3,756,000 2,194,000 2,571,000 3,090,000 1,916,000 2,731,000 1,604,000 1,156,000 1,179,000 2,193,000 2,868,000 2,055,000 1,638,000 788,000 832,000 1,339,000 1,228,000 1,145,000 1,269,000     
          refunds of advances for construction
        -2,600,000 -2,345,000 -2,574,000 -2,226,000 -2,317,000 -2,295,000 -2,239,000 -2,514,000 -2,351,000 -2,474,000 -2,090,000 -2,543,000 -2,248,000 -2,614,000 -2,346,000 -2,153,000 -2,355,000 -2,430,000 -2,482,000 -3,011,000 -2,711,000 -3,186,000 -2,676,000 -2,184,000 -2,157,000 -2,006,000 -2,005,000 -1,765,000 -1,790,000 -1,835,000 -1,964,000 -1,580,000 -1,918,000 -2,062,000 -1,886,000 -2,194,000 -2,236,000 -1,691,000 -1,722,000 -1,860,000 -1,612,000 -1,676,000               -1,194,000 -1,501,000 -1,669,000 -1,470,000 -1,548,000 -1,685,000 -1,834,000 -1,485,000 -1,035,000 -1,279,000 -1,708,000 -2,223,000 -1,452,000 
          repurchase of common stock
        -823,000 -107,000 -112,000 -105,000 -1,109,000 -96,000 -104,000 -93,000 -1,142,000 -104,000 -90,000 -108,000 -1,542,000 -122,000 -105,000 -112,000 -1,674,000 -174,000 -69,000 -109,000 -1,415,000 -101,000 -99,000 -106,000 -1,373,000 -142,000 -152,000 -129,000 -2,074,000 -149,000 -132,000 -125,000 -1,239,000 -146,000 -123,000 -117,000 -1,119,000                                 
          issuance of common stock
        6,880,000 2,140,000 561,000 600,000 743,000 572,000 35,080,000 52,612,000 769,000 633,000 552,000 95,079,000 18,842,000 48,030,000 27,441,000 30,704,000 564,000 69,216,000 65,904,000 39,428,000 23,175,000 25,002,000 20,567,000 31,495,000 6,511,000 19,145,000 449,000 375,000 454,000                    110,688,000                  
          dividends paid
        -19,980,000 -17,879,000 -17,876,000 -17,872,000 -20,226,000 -16,654,000 -16,472,000 -16,172,000 -16,164,000 -15,006,000 -15,003,000 -14,571,000 -14,456,000 -13,715,000 -13,590,000 -13,452,000 -13,429,000 -12,252,000 -11,863,000 -11,702,000 -11,581,000 -10,591,000 -10,506,000 -10,356,000 -10,315,000 -9,516,000 -9,507,000 -9,507,000 -9,493,000 -9,014,000 -9,012,000 -9,014,000 -9,003,000 -8,643,000 -8,642,000 -8,644,000 -8,634,000 -8,274,000 -8,275,000 -8,274,000 -8,258,000 -8,019,000               -6,406,000 -6,197,000 -6,189,000 -6,189,000 -6,178,000 -6,123,000 -6,120,000 -6,119,000 -6,114,000 -6,060,000 -6,098,000 -6,098,000 -6,093,000 
          payment for purchase of noncontrolling interest
        -6,951,000                                                                     
          distribution to noncontrolling interest
         -339,000 -451,000   -177,000                                                         
          net cash from financing activities
        86,440,000 80,139,000 -3,289,000 76,492,000 65,923,000 62,398,000 41,190,000 4,548,000 86,588,000 51,400,000 -24,266,000 81,883,000 62,526,000 34,768,000 16,781,000 38,892,000 5,682,000 -27,963,000 33,950,000 19,930,000 78,761,000 -7,152,000 14,337,000 63,890,000 158,901,000 29,824,000 -12,987,000 32,995,000 52,915,000 -20,049,000 43,285,000 40,863,000 -17,621,000 51,522,000 -1,389,000 53,261,000 24,700,000 29,166,000 -21,676,000 31,896,000 48,408,000 -12,242,000   21,908,000  7,816,000 9,641,000 -24,825,000        158,000 58,994,000 -4,580,000 18,081,000 7,020,000 -5,632,000 -6,942,000 45,225,000 5,637,000 -6,708,000 6,629,000 2,545,000 8,816,000 
          change in cash, cash equivalents, and restricted cash
        6,371,000 -24,237,000 25,454,000 6,021,000 -5,552,000 -9,510,000 22,522,000 -5,588,000 3,297,000 15,916,000 -20,614,000 3,225,000 1,414,000 -28,417,000 49,212,000 -7,622,000 -8,801,000 -60,741,000 73,897,000 -17,655,000 40,023,000 -68,821,000 -951,000 -26,095,000 97,698,000 -8,525,000 -3,257,000 -5,810,000 13,175,000 -19,325,000 32,827,000 -1,068,000 -60,019,000                                     
          cash, cash equivalents, and restricted cash at beginning of period
        97,373,000  95,687,000  84,966,000  85,025,000  80,653,000  45,129,000  43,298,000  47,715,000  95,352,000                                     
          cash, cash equivalents, and restricted cash at end of period
        103,744,000  25,454,000 6,021,000 90,135,000  22,522,000 -5,588,000 88,263,000  -20,614,000 3,225,000 86,439,000  49,212,000 -7,622,000 71,852,000  73,897,000 -17,655,000 85,152,000  -951,000 -26,095,000 140,996,000  -3,257,000 -5,810,000 60,890,000  32,827,000 -1,068,000 35,333,000                                     
          supplemental disclosures of cash flow information:
                                                                             
          cash paid for interest
        7,515,000  6,255,000 27,320,000 4,103,000  3,921,000 24,819,000 3,359,000  2,268,000 22,099,000 1,578,000  560,000 18,431,000 187,000  608,000 18,329,000 1,225,000  1,429,000 19,524,000 909,000  1,027,000 17,681,000 3,352,000  2,612,000 16,093,000 1,251,000  1,355,000 14,938,000 994,000  317,000 13,091,000 481,000  954,000 11,915,000 749,000 1,070,000 12,195,000 837,000 758,000 13,322,000 1,061,000 578,000 12,860,000 283,000 1,239,000 11,905,000 1,078,000   10,410,000 906,000    729,000  527,000 8,028,000 670,000 
          supplemental disclosure of investing and financing non-cash activities:
                                                                             
          accrued payables for investments in utility plant
        58,664,000 7,319,000 84,000 12,335,000 48,093,000 -583,000 5,595,000 14,326,000 37,498,000 2,947,000 1,983,000 7,414,000 42,038,000 -10,433,000 5,422,000 -1,211,000 57,733,000 -5,279,000 9,722,000 4,773,000 48,552,000 7,972,000 -7,034,000 16,031,000 38,018,000 9,118,000 212,000 1,727,000 29,737,000 6,479,000 1,632,000 2,329,000 28,367,000 9,267,000 3,256,000 4,303,000 24,191,000 383,000 1,370,000 2,493,000 22,904,000 -3,310,000 2,966,000 7,516,000 14,374,000 4,064,000 1,554,000 10,690,000 2,247,000 2,533,000 6,959,000 656,000 -3,521,000 12,519,000 1,132,000 1,193,000 5,421,000 -1,191,000 -999,000 -510,000 9,265,000 1,557,000 390,000 1,982,000 5,641,000 719,000 -8,851,000 15,049,000 4,050,000 
          utility plant contributed by developers
        7,219,000                                                                 -1,297,000 5,204,000   
          amortization of debt premium and expenses
                                                                             
          changes in normalized deferred income taxes
                                                                             
          stock-based compensation
                                                                             
          receivables
                                                 20,267,000   600,000   6,006,000      3,524,000   -892,000 8,405,000 -7,170,000 -10,162,000 8,067,000 21,892,000 -19,384,000 -9,693,000 -2,372,000 5,605,000 -9,979,000 -6,170,000 4,475,000 
          water arrearages payment program cash received
                                                                          
          water arrearages payment program cash returned
                                                                           
          accrued and unbilled revenue
                                                                             
          taxes, prepaid expenses, and other assets
                                                                             
          business acquisitions, net of cash acquired
                                                                             
          asset acquisitions
                                                                            
          purchase of life insurance
                                                                -1,589,000 -93,000 -92,000 -140,000 -1,566,000 -102,000 -98,000 -240,000 -1,373,000     
          life insurance proceeds
             1,426,000     4,961,000 1,727,000              1,437,000    1,108,000 450,000  495,000                             
          issuance of long-term debt, net of debt issuance costs of 1,777, 184, and 0, respectively
                                                                             
          per- and polyfluoroalkyl substances (pfas) settlement proceeds
         6,104,000 24,221,000                                                                   
          retirement of long-term debt
                                                                             
          cash, cash equivalents, and restricted cash at beginning of year
                                                                             
          cash, cash equivalents, and restricted cash at end of year
                                                                             
          cash paid during the year for:
                                                                             
          interest
                                                                             
          purchase of life insurance contracts
              -2,509,000 -1,426,000      -4,961,000 -1,727,000              -2,871,000    -2,732,000 -380,000 -836,000  -1,645,000 -105,000 -960,000                             
          asset acquisition
                   -102,000 -1,447,000 -6,139,000 -180,000                                                     
          supplemental information:
                                                                             
          supplemental disclosure of non-cash activities:
                                                                             
          utility plant contribution by developers
          9,268,000 10,456,000 3,706,000  7,854,000 5,742,000 8,417,000  4,667,000 8,280,000 7,032,000  5,610,000 4,095,000 5,771,000  9,103,000 7,664,000 5,899,000  8,944,000 5,811,000 8,007,000  12,863,000 6,981,000 4,111,000  6,154,000 4,135,000 4,518,000  5,810,000 3,731,000 3,481,000  4,906,000 4,708,000 2,490,000  2,327,000 1,423,000 1,823,000 3,829,000 3,299,000 1,020,000 3,387,000 5,531,000 1,278,000 3,158,000 6,124,000 2,586,000 3,517,000 6,489,000 1,257,000  2,806,000 6,296,000 16,943,000  6,356,000 4,837,000 2,747,000     
          write-off (recovery) of capital costs
                                                                             
          issuance of long-term debt, net of debt issuance costs of 184
                                                                             
          income taxes
                                                                             
          short-term borrowings, net of debt issuance costs of 0 for 2024 and 1,552 for 2023
              75,000,000 125,000,000 170,000,000                                                             
          receivables and accrued unbilled revenue
                                                                             
          proceeds from sale of property
                                                                             
          others
               1,160,000                                                             
          receivables and unbilled revenue
                21,523,000  -3,876,000 -19,276,000 17,089,000  -35,764,000 -21,434,000 -10,079,000  -20,033,000 -29,452,000 6,265,000  -35,159,000 -13,476,000 7,261,000  -12,817,000 -21,766,000 5,147,000  -4,040,000 -19,869,000 5,438,000  -17,418,000 -30,969,000 -4,564,000  -12,791,000 -7,688,000 7,127,000                             
          gain on sale of non-utility properties
                                                                             
          (recovery) write-off of capital costs
                                                                             
          unbilled revenue
                                                                         6,784,000 -2,949,000 -5,579,000 1,543,000 
          proceeds from sale of non-utility properties
                                                                             
          return of investment
                                                                           
          issuance of long-term debt, net of debt issuance costs of 0 for 2023, 0 for 2022, and 1,064 for 2021
                                                                             
          litigation proceeds for tcp contamination reclassified from liability to depreciable plant and equipment
                                                                             
          short-term borrowings, net of issuance costs of 1,552 for 2023 and 0 for 2022
                  15,000,000 55,000,000 93,448,000                                                         
          water arrearages payment program
                       20,836,000                                                     
          write-off of capital costs
                                                                             
          business acquisition, net of cash acquired
                           -939,000 -1,889,000                                               
          payment for investments
                                                                             
          issuance of long-term debt, net of debt issuance costs of 0 for 2022, 1,064 for 2021, and 0 for 2020.
                                                                             
          issuance of long-term debt, net of debt issuance costs of 0 for 2022 and 1,064 for 2021
                                                                             
          payment for investment
                            -2,900,000                                                 
          issuance of long-term debt, net of debt issuance costs of 1,064 for 2021, 0 for 2020, and 1,796 for 2019.
                                                                             
          issuance of long-term debt, net of debt issuance costs of 1,064 for 2021 and 0 for 2020
                                                                            
          net loss
                            -3,032,000    -20,307,000    -7,640,000                                         
          adjustments to reconcile net loss to net cash from operating activities:
                                                                             
          refund of investment
                            1,000,000                                                 
          proceeds from sale of non-utility assets
                                                                             
          life insurance benefits
                                                                             
          issuance of long-term debt, net of debt issuance costs of 0 for 2020, 1,796 for 2019, and 617 for 2018
                                                                             
          litigation proceeds for tcp and mtbe contamination reclassified from liability to depreciable plant and equipment
                                                                             
          issuance of long-term debt, net of expenses of 1,569 for 2019
                                                                             
          issuance of long-term debt, net of expenses of 1,558 for 2019
                                                                             
          tcp settlement proceeds
                                                                             
          issuance of long-term debt, net of debt issuance costs of 1,796 for 2019, 617 for 2018, 0 for 2017
                                                                             
          income tax refunds
                                                                             
          issuance of long-term debt, net of expenses of 1,569 for 2019 and 617 for 2018
                                                                             
          issuance of long-term debt, net of expenses of 1,558 for 2019 and 0 for 2018
                                                                             
          loss on sale of non-utility property
                                                                            
          issuance of long-term debt, net of expenses of 617 for 2018, 0 for 2017, 177 for 2016
                                                                             
          litigation proceeds for contamination reclassified from liabilities to depreciable plant and equipment
                                                                             
          issuance of long-term debt, net of expenses of 617 for 2018 and 0 for 2017
                                                                             
          income tax refund
                                                                            
          change in restricted cash
                                         598,000 -81,000 -338,000 -260,000 751,000 -32,000 -188,000 -465,000 529,000 -287,000                           
          short-term borrowings, net of expenses of 0 for 2017 and 2016, and 1,197 for 2015
                                                                             
          issuance of long-term debt, net of expenses of 0 for 2017, 177 for 2016, and 707 for 2015
                                                                             
          change in cash and cash equivalents
                                         66,435,000 -762,000 17,113,000 -13,502,000 4,141,000 -9,475,000 -52,000 22,041,000 -41,988,000 26,310,000 -8,796,000 13,724,000 -221,000     88,887,000      -1,408,000 32,539,000 4,092,000 -5,706,000 1,486,000 -37,715,000 6,083,000 36,220,000 -8,591,000 4,460,000 3,280,000 3,162,000 -3,767,000 
          cash and cash equivalents at beginning of year
                                                                             
          cash and cash equivalents at end of year
                                                                             
          litigation proceeds for mtbe contamination reclassified from other long-term liabilities to depreciable plant and equipment
                                                                             
          proceeds from long-term debt, net of issuance costs of 0 for 2017 and 177 for 2016
                                                                             
          cash and cash equivalents at beginning of period
                                          25,492,000  8,837,000  19,587,000 27,506,000 38,790,000 27,203,000 42,277,000  9,866,000  13,869,000  6,734,000 
          cash and cash equivalents at end of period
                                          -762,000 17,113,000 11,990,000  -9,475,000 -52,000 30,878,000  26,310,000 -8,796,000 33,311,000 -221,000 7,962,000 21,744,000 10,179,000 -89,009,000 127,677,000 -3,845,000 4,802,000 16,014,000 13,830,000 -7,987,000 40,869,000  4,092,000 -5,706,000 11,352,000  6,083,000 36,220,000 5,278,000  3,280,000 3,162,000 2,967,000 
          adjustments to reconcile net income to net cash:
                                                                             
          proceeds from long-term debt, net of expenses of 0 for 2017, 177 for 2016
                                                                             
          changes in deferred income taxes
                                                                             
          short-term borrowings net of expenses of 0 for 2016, 1,197 for 2015, and 0 for 2014
                                                                             
          issuance of long-term debt, net of expenses of 177 for 2016, 707 for 2015, and 0 for 2014
                                                                             
          litigation proceeds for mtbe contamination reclassified from other long-term liabilities to capital
                                                                             
          proceeds from long-term debt, net of issuance costs of 177 for 2016, 0 for 2015
                                                                            
          short-term borrowings issuance costs
                                                                             
          proceeds of long-term debt, net of expenses of 177 for 2016, none for 2015
                                                50,039,000                             
          (gain) on sale of non-utility property
                                                                             
          short-term borrowings net of expenses of 1,197 for 2015, none for 2014 and 2013
                                                                             
          common stock issuance cost
                                                                             
          issuance of long-term debt, net of expenses of 707 for 2015, none for 2014 and 2013
                                                                             
          debt issuance costs
                                                                             
          proceeds from long-term debt
                                                           25,000      7,805,000         
          operating activities
                                                                             
          net cash provided by operating activities
                                                                             
          net cash provided by financing activities
                                                                             
          supplemental information
                                                                             
          changes in restricted cash and other changes
                                                       418,000   108,000   102,000                
          issuance of long-term debt
                                                    50,000                         
          cash paid for income taxes
                                                              17,000    23,000 22,000 23,000  359,000    6,570,000   
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                             
          changes in value of life insurance contracts
                                                                             
          common stock issuance costs
                                                                             
          changes in restricted cash
                                                                -86,000             
          net
                                                       -5,476,000                      
          adjustments to reconcile net (loss) to net cash provided by operating activities:
                                                                             
          restricted cash decrease
                                                                    24,000         
          repayment of short-term borrowing
                                                                            
          refund for income taxes
                                                                            
          change in restricted cash and other changes
                                                                             
          net cash provided (used in) by financing activities
                                                          102,870,000                   
          net adjustments
                                                           37,536,000 -3,784,000 21,831,000 29,122,000 10,901,000 21,857,000 -6,827,000 24,224,000 346,000 20,111,000 -11,190,000 27,011,000   7,397,000 26,079,000 5,392,000 17,057,000 
          net cash (used in) investing activities
                                                                             
          net cash (used in) financing activities
                                                                             
          gain on sale of non-utility property
                                                                 11,000    115,000 -72,000 -603,000     
          other changes
                                                                620,000 -2,215,000 -270,000 -2,460,000 609,000 52,000 246,000 455,000 63,000 -1,141,000 1,299,000 507,000 981,000 
          proceeds on sale of non-utility property
                                                              1,000        79,000 671,000     
          restricted cash
                                                                             
          repayment of long-term borrowings
                                                                -220,000    -991,000         
          material and supplies
                                                                             
          mtbe settlement received
                                                                             
          acquisitions
                                                                             
          issuance of common stock, net of expenses
                                                                             
          issuance of long-term debt, net of expenses
                                                                             
          redemption of preferred stock
                                                                            
          purchase of intangible assets with company common stock
                                                                           
          proceeds from long-term debt, net of issuance cost
                                                                  66,000           
          cash paid for interest, net of interest capitalized
                                                                      164,000       
          restricted cash increases
                                                                             
          utility plant expenditures:
                                                                             
          company funded
                                                                      -32,207,000 -27,126,000 -23,529,000  -36,076,000 -11,437,000 -27,090,000 
          developer funded
                                                                      -1,273,000    -1,197,000 -2,088,000 -2,735,000 
          proceeds from long-term debt, net of issuance cost of 3,390
                                                                      96,000       
          for the three months ended:
                                                                             
          developer advances and contributions in aid of construction
                                                                        -1,475,000     
          company-funded
                                                                             
          deferred income taxes, investment tax credits, regulatory assets and liabilities, net and other
                                                                          2,174,000   
          taxes and other prepaid expenses
                                                                          3,517,000   
          acquisitions, net of cash acquired
                                                                             
          net short-term borrowings
                                                                          17,000,000   
          proceeds from long-term debt, net of issuance costs
                                                                             
          advances for construction
                                                                          -723,000 -1,142,000 2,250,000 
          contributions in aid of construction
                                                                          2,105,000 3,223,000 835,000 
          net repayment of long-term debt
                                                                           -215,000 -724,000 
          deferred income taxes, investment tax credits regulatory assets and liabilities, net and other
                                                                            -407,000 
          taxes, prepaid expenses and other assets
                                                                            -877,000