7Baggers

Hawaiian Electric Industries, Inc
(NYSE:HE) 

HE stock logo

Hawaiian Electric Industries, Inc., through its subsidiaries, engages in the electric utility, banking, and renewable/sustainable infrastructure investment businesses in the state of Hawaii. It operates in three segments: Electric Utility, Bank, and Other. The Electric Utility segment engages in the...

Founded: 1891
Full Time Employees: 3,841
Sector: Utilities
Industry: Utilities-Regulated Electric

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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 2019-12-31 2019-09-30 2018-12-31 2018-09-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-03-31 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 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-09-30 2007-06-30 2007-03-31 2003-09-30 2003-06-30 2002-09-30 2002-06-30 
                                                                   
      revenues
                                                                   
      electric utility
    744,040,000 802,906,000 787,428,000 742,482,000 738,366,000 796,174,000 829,617,000 792,331,000 788,578,000 849,982,000 794,987,000 794,191,000 830,361,000 924,951,000 955,971,000 818,873,000 708,792,000 693,394,000 679,499,000 601,879,000 564,864,000 571,095,000 562,568,000 534,215,000 645,333,000 688,330,000 680,563,000 687,409,000 570,427,000 583,311,000 598,769,000 556,875,000 518,611,000 544,668,000 572,253,000 482,052,000 648,127,000 558,163,000 573,442,000 803,565,000 738,429,000 720,062,000 766,115,000 730,688,000 719,273,000 801,095,000 789,552,000 749,610,000 584,095,000 548,111,000 548,440,000 450,417,000 461,797,000 827,788,000 688,121,000 623,889,000 567,615,000 492,712,000 447,678,000 359,250,000 354,529,000 333,636,000 307,676,000 
      other
    2,407,000 2,918,000 3,182,000 3,910,000 5,704,000 3,006,000 3,622,000 3,086,000 3,436,000 3,442,000 5,912,000 4,609,000 4,019,000 4,944,000 4,815,000 1,410,000 1,161,000 1,079,000 1,197,000 1,118,000 951,000 707,000 215,000 16,000 3,000 4,000 -169,000 143,000 28,000 120,000 127,000 77,000 95,000 100,000 94,000 68,000 -42,000 -34,000 72,000 -5,000 -388,000 68,000 56,000 15,000 35,000 29,000 3,959,000 4,348,000 3,516,000 15,000 -74,000 -15,000 -32,000 -32,000 -16,000 -116,000 339,000 525,000 1,885,000 683,000 1,524,000 -1,798,000 -743,000 
      total revenues
    746,447,000 805,824,000 790,610,000 746,392,000 744,070,000 486,949,000 938,383,000 897,360,000 897,158,000 956,371,000 901,873,000 895,685,000 928,237,000 1,019,113,000 1,042,197,000 895,607,000 785,068,000 770,272,000 756,904,000 680,257,000 642,946,000 652,217,000 641,427,000 608,945,000 725,966,000 771,535,000 761,650,000 768,048,000 645,874,000 658,597,000 673,185,000 632,281,000 591,562,000 617,395,000 646,055,000 550,960,000 717,176,000 623,912,000 637,862,000 867,096,000 798,657,000 783,749,000 831,229,000 796,730,000 784,064,000 867,720,000 854,268,000 814,860,000                
      yoy
    0.32% 65.48% -15.75% -16.82% -17.06% -49.08% 4.05% 0.19% -3.35% -6.16% -13.46% 0.01% 18.24% 32.31% 37.69% 31.66% 22.10% 18.10% 18.00% 11.71% -11.44% -15.47% -15.78% -20.72% 12.40% 17.15% 13.14% 21.47% 9.18% 6.67% 4.20% 14.76% -17.52% -1.04% 1.28% -36.46% -10.20% -20.39% -23.26% 8.83% 1.86% -9.68% -2.70% -2.22%                    
      qoq
    -7.37% 1.92% 5.92% 0.31% 52.80% -48.11% 4.57% 0.02% -6.19% 6.04% 0.69% -3.51% -8.92% -2.21% 16.37% 14.08% 1.92% 1.77% 11.27% 5.80% -1.42% 1.68% 5.33% -16.12% -5.91% 1.30% -0.83% 18.92% -1.93% -2.17% 6.47% 6.88% -4.18% -4.44% 17.26% -23.18% 14.95% -2.19% -26.44% 8.57% 1.90% -5.71% 4.33% 1.62% -9.64% 1.57% 4.84%                 
      expenses
                                                                   
      total expenses
    693,070,000 738,715,000 738,564,000 692,645,000 681,650,000 424,605,000 1,064,931,000 2,616,335,000 820,739,000 865,375,000 826,762,000 802,706,000 834,719,000 926,099,000 940,082,000 808,939,000 685,792,000 681,409,000 659,588,000 578,401,000 544,915,000 571,543,000 541,866,000 537,389,000 625,171,000 674,227,000 677,046,000 669,984,000 573,985,000 573,609,000 563,640,000 556,385,000 523,700,000 528,968,000 540,613,000 482,109,000 620,081,000 551,182,000 568,356,000 775,994,000 716,382,000 695,443,000 741,130,000 714,360,000 713,407,000 776,018,000 774,862,000 739,044,000                
      operating income
                                                                   
      yoy
                                                                   
      qoq
                                                                   
      operating margin %
    0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% 
      total operating income
    53,377,000 67,109,000 52,046,000 53,747,000 62,420,000 62,344,000 -126,548,000 -1,718,975,000 76,419,000 90,996,000 75,111,000 92,979,000 93,518,000 93,014,000 102,115,000 86,668,000 99,276,000 88,863,000 97,316,000 101,856,000 98,031,000 80,674,000 99,561,000 71,556,000 100,795,000 97,308,000 84,604,000 98,064,000 71,889,000 84,988,000 109,545,000 75,896,000 67,862,000 88,427,000 105,442,000 68,851,000 97,095,000 72,730,000 69,506,000 91,102,000 82,275,000 88,306,000 90,099,000 82,370,000 70,657,000 91,702,000 79,406,000 75,816,000                
      retirement defined benefits credit—other than service costs
    879,000 829,000 817,000 919,000 917,000 85,000 1,106,000 1,281,000 1,282,000 1,207,000 1,256,000 1,153,000 1,152,000 882,000 1,039,000 1,246,000 1,243,000                                               
      interest expense
    -31,128,000 -29,655,000 -26,211,000 -27,256,000 -34,212,000                                                           
      allowance for borrowed funds used during construction
    1,705,000 1,514,000 1,500,000 1,462,000 1,417,000 1,409,000 1,331,000 1,344,000 1,386,000 1,403,000 1,372,000 1,295,000 1,131,000 1,015,000 825,000 798,000 778,000 864,000 827,000 812,000 747,000 751,000 801,000 752,000 988,000 1,208,000 1,052,000 1,006,000 1,444,000 1,407,000 1,339,000 1,143,000 889,000 868,000 854,000 662,000 737,000 682,000 499,000 740,000 523,000 614,000 498,000 398,000 730,000 688,000 893,000 870,000 790,000 779,000 1,118,000 1,727,000 1,622,000 967,000 835,000 762,000 656,000 586,000 598,000 496,000 446,000 549,000 488,000 
      allowance for equity funds used during construction
    3,764,000 3,905,000 3,821,000 3,702,000 3,585,000 3,510,000 3,300,000 3,336,000 3,640,000 4,091,000 4,000,000 3,772,000 3,301,000 3,143,000 2,552,000 2,470,000 2,409,000 2,539,000 2,427,000 2,377,000 2,191,000 2,212,000 2,347,000 2,194,000 2,652,000 3,250,000 2,638,000 1,962,000 3,294,000 3,575,000 3,482,000 3,027,000 2,399,000 2,315,000 2,274,000 1,739,000 2,057,000 1,896,000 1,413,000 1,937,000 1,387,000 1,609,000 1,255,000 1,560,000 1,215,000 1,611,000 1,997,000 1,940,000 1,847,000 1,773,000 2,628,000 4,120,000 3,605,000 2,426,000 2,105,000 1,901,000 1,336,000 1,202,000 1,232,000 1,098,000 989,000 1,162,000 1,042,000 
      interest and dividend income
    9,995,000                                                               
      loss on sale of a subsidiary
        -13,211,000                                                           
      income before income taxes
    38,592,000     -459,311,250 -149,234,000 -1,742,280,000 54,269,000 56,920,000 49,110,000 69,367,000 70,304,000 70,593,000 79,905,000 66,217,000 87,480,000 69,572,000 78,151,000 82,944,000 80,196,000 61,177,000 79,521,000 60,230,000 81,983,000 78,693,000 64,370,000 77,233,000 53,276,000 70,233,000 95,139,000 59,626,000 51,582,000 72,599,000 179,205,000 51,126,000 80,660,000 56,402,000 52,318,000 74,609,000 64,163,000 71,073,000 71,548,000 64,715,000 52,814,000 73,981,000 62,097,000 60,087,000 45,748,000 42,878,000 52,707,000 22,992,000 32,052,000   53,687,000   9,387,000  40,499,000 51,158,000 48,164,000 
      income tax expense
    8,142,000 12,108,000 8,728,000 13,417,000 6,395,000 9,936,000 -45,303,000 -447,269,000                                                        
      net income
    30,450,000     -339,086,750 -103,931,000 -1,295,011,000 42,595,000 49,262,000 41,589,000 55,083,000 55,194,000 57,821,000 62,553,000 53,014,000 69,640,000 54,994,000 63,886,000 64,345,000 64,831,000 50,958,000 65,503,000 49,360,000 66,736,000 63,890,000 50,046,000 66,371,000 40,720,000 32,843,000 60,544,000 39,134,000 34,666,000 45,107,000 127,613,000 32,825,000 51,144,000 35,491,000 32,339,000 48,286,000 41,894,000 46,400,000 48,707,000 41,061,000 34,152,000 48,177,000 39,273,000 38,789,000 29,735,000 27,599,000 33,954,000 15,952,000 20,868,000 37,281,000 5,136,000 33,967,000 19,881,000 17,549,000 6,764,000 30,522,000 21,890,000 32,777,000 30,984,000 
      yoy
         -788.33% -349.90% -2451.02% -22.83% -14.80% -33.51% 3.90% -20.74% 5.14% -2.09% -17.61% 7.42% 7.92% -2.47% 30.36% -2.85% -20.24% 30.89% -25.63% 63.89% 94.53% -17.34% 69.60% 17.46% -27.19% -52.56% 19.22% -32.22% 27.09% 294.61% -32.02% 22.08% -23.51% -33.61% 17.60% 22.67% -3.69% 24.02% 5.86% 14.85% 74.56% 15.67% 143.16% 42.49% -25.97% 561.10% -53.04% 4.96% 112.44% -24.07% 11.29% -9.18% -46.46% -78.17%     
      qoq
         226.26% -91.97% -3140.29% -13.53% 18.45% -24.50% -0.20% -4.54% -7.56% 17.99% -23.87% 26.63% -13.92% -0.71% -0.75% 27.22% -22.21% 32.70% -26.04% 4.45% 27.66% -24.60% 62.99% 23.98% -45.75% 54.71% 12.89% -23.15% -64.65% 288.77% -35.82% 44.10% 9.75% -33.03% 15.26% -9.71% -4.74% 18.62% 20.23% -29.11% 22.67% 1.25% 30.45% 7.74% -18.72% 112.85% -23.56% -44.03% 625.88% -84.88% 70.85% 13.29% 159.45% -77.84% 39.43% -33.22% 5.79%  
      net income margin %
    4.08% 0% 0% 0% 0% -69.63% -11.08% -144.31% 4.75% 5.15% 4.61% 6.15% 5.95% 5.67% 6.00% 5.92% 8.87% 7.14% 8.44% 9.46% 10.08% 7.81% 10.21% 8.11% 9.19% 8.28% 6.57% 8.64% 6.30% 4.99% 8.99% 6.19% 5.86% 7.31% 19.75% 5.96% 7.13% 5.69% 5.07% 5.57% 5.25% 5.92% 5.86% 5.15% 4.36% 5.55% 4.60% 4.76% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 
      preferred stock dividends of subsidiaries
     354,250 471,000 473,000 473,000 473,000 471,000 473,000 473,000 473,000 471,000 473,000 473,000 473,000 471,000 473,000 473,000 473,000 471,000 473,000 473,000 473,000 471,000 473,000 473,000 471,000 473,000 471,000 473,000 473,000 471,000 473,000 473,000 473,000 471,000 473,000 471,000 473,000 473,000 471,000 473,000 473,000 471,000 473,000 473,000 471,000 473,000 473,000 473,000 473,000    -471,000 -473,000 -473,000 -474,000 -473,000 -473,000 -501,000 -501,000 -501,000 -502,000 
      net income for common stock
    30,450,000 39,617,000 30,747,000 26,085,000 26,671,000 -68,245,000 -104,402,000 -1,295,484,000 42,122,000 48,789,000 41,118,000 54,610,000 54,721,000 57,348,000 62,082,000 52,541,000 69,167,000 54,521,000 63,415,000 63,872,000 64,358,000 50,485,000 65,032,000 48,887,000 66,263,000 63,419,000 49,573,000 65,900,000 40,247,000 32,370,000 60,073,000 38,661,000 34,193,000 44,634,000 127,142,000 32,352,000 50,673,000 35,018,000 31,866,000 47,815,000 41,421,000 45,927,000 48,236,000 40,588,000 33,679,000 47,706,000 38,800,000 38,316,000 29,262,000 27,126,000 33,483,000 15,479,000 20,395,000           
      basic earnings per common share
    180 230 180 150 150 930 -910 -11,740 380 450 370 500 500 520 570 480 630 500 580 580 590 460 600 450 610 580 450 610 370 300 550 360 310 410 1,170 300 470 330 310 470 410 450 490 410 340 490 400 400 310 290 370 170 230 440 60 410 240 210 80     
      diluted earnings per common share
    180 230 180 150 150 930 -910 -11,740 380 440 370 500 500 520 570 480 630 500 580 580 590 460 590 450 600 580 450 600 370 300 550 360 310 410 1,170 300 470 330 310 460 410 450 480 410 340 490 400 400 310 290 370 170 220 440 60 410 240 210 80     
      weighted-average number of common shares outstanding
    172,626,000 172,553,000    126,927,000   110,218,000 109,739,000 109,728,000 109,573,000 109,514,000 109,434,000 109,470,000 109,432,000 109,361,000 109,282,000 109,311,000 109,282,000 109,221,000 109,140,000 109,181,000 109,146,000 108,949,000 108,973,000 108,855,000 108,879,000 108,818,000 108,749,000 108,786,000 108,750,000 108,674,000 108,102,000 108,268,000 107,620,000 107,457,000 107,418,000 103,281,000 102,416,000 101,495,000 101,382,000 99,204,000 98,660,000 98,135,000 97,157,000 96,693,000 96,167,000 93,159,000 92,572,000 91,522,000 91,384,000 90,604,000 84,625,000 84,052,000 83,472,000 82,481,000 81,907,000 81,448,000 37,516,000 37,195,000 36,435,000 36,189,000 
      net effect of potentially dilutive shares
    700,000        258,000 -27,000 189,000 207,000 311,000 53,000 235,000 230,000 273,000 -18,000 264,000 233,000 271,000 -45,000 155,000 159,000 21,000 390,000 48,000 176,000 206,000 12,000 79,000 47,000 184,000 -13,000 204,000 161,000 281,000 276,000 286,000 610,000 330,000 783,000 614,000 589,000 405,000                   
      weighted-average shares assuming dilution
    173,326,000 173,017,000    126,927,000   110,476,000 110,038,000 109,917,000 109,780,000 109,825,000 109,778,000 109,705,000 109,662,000 109,634,000 109,580,000 109,575,000 109,515,000 109,492,000 109,356,000 109,336,000 109,305,000 109,407,000 109,363,000 109,146,000 109,055,000 109,024,000 108,933,000 108,865,000 108,797,000 108,858,000                               
      interest income
     9,767,000 6,960,000 7,579,000 12,623,000 9,433,000 3,662,000 3,134,000 3,133,000                                                       
      gain on sale of subsidiaries and impairment loss on assets sold and held for sale
     -3,094,000 1,013,000                                                             
      income from continuing operations before income taxes
     53,469,000 39,946,000 39,975,000 33,539,000                                                       48,005,000    
      income from continuing operations
     41,361,000 31,218,000 26,558,000 27,144,000                                                       30,522,000 25,760,000 32,777,000 30,984,000 
      income from continuing operations for common stock
     39,617,000 30,747,000 26,085,000 26,671,000                                                           
      income from discontinued operations
                                                                   
      continuing operations - basic earnings per common share
     230 180 150 150                                                           
      discontinued operations - basic earnings per common share
                                                                   
      continuing operations - diluted earnings per common share
     230 180 150 150                                                           
      discontinued operations - diluted earnings per common share
                                                                   
      weighted-average number of common shares outstanding:
                                                                   
      basic
      172,617,000 172,496,000 172,478,000  114,358,000 110,303,000                                                        
      diluted
      172,916,000 172,655,000 172,812,000  114,358,000 110,303,000                                                        
      loss on sale of a subsidiary and impairment loss on assets held for sale
       -178,000                                                            
      loss from discontinued operations
                                                                   
      discontinued operations - basic loss per common share
                                                                   
      discontinued operations - diluted loss per common share
                                                                   
      bank
         78,057,750 105,144,000 101,943,000 105,144,000 102,947,000 100,974,000 96,885,000 93,857,000 89,218,000 81,411,000 75,324,000 75,115,000 75,799,000 76,208,000 77,260,000 77,131,000 80,415,000 78,644,000 74,714,000 80,630,000 83,201,000 81,256,000 80,496,000 75,419,000 75,166,000 74,289,000 75,329,000 72,856,000 72,627,000 73,708,000 68,840,000 69,091,000 65,783,000 64,348,000 63,536,000 60,616,000 63,619,000 65,058,000 66,027,000 64,756,000 66,596,000 64,721,000 65,252,000 71,632,000 70,914,000 71,947,000 75,499,000 82,032,000 87,675,000 85,950,000 105,844,000 105,507,000 107,526,000 104,460,000 93,770,000 92,703,000 99,722,000 102,069,000 
      interest expense, net—other than on deposit liabilities and other bank borrowings
         -24,019,000 -32,085,000 -32,400,000 -31,591,000 -22,814,750 -32,629,000 -29,832,000 -28,798,000 -18,985,000 -26,626,000 -24,965,000 -24,349,000 -17,632,500 -23,477,000 -23,317,000 -23,736,000 -16,618,500 -22,086,000 -22,613,000 -17,270,250 -22,425,000 -16,510,500 -22,523,000 -21,518,000 -14,808,750 -19,227,000 -20,440,000 -19,568,000 -14,198,000 -19,365,000 -20,126,000 -19,229,000 -18,906,000 -19,100,000 -19,170,000 -20,022,000 -19,456,000                      
      income taxes
            11,674,000 7,658,000 7,521,000 14,284,000 15,110,000 12,772,000 17,352,000 13,203,000 17,840,000 14,578,000 14,265,000 18,599,000 15,365,000 10,219,000 14,018,000 10,870,000 15,247,000 14,803,000 14,324,000 10,862,000 12,556,000 37,390,000 34,595,000 20,492,000 16,916,000 27,492,000 51,592,000 18,301,000 29,516,000 20,911,000 19,979,000 26,323,000 22,269,000 24,673,000 22,841,000 23,654,000 18,662,000 25,804,000 22,824,000 21,298,000 16,013,000 15,279,000 18,753,000 7,040,000 11,184,000 20,425,000 747,000 19,720,000 10,065,000 9,793,000 2,623,000 17,483,000 14,739,000 18,381,000 17,180,000 
      gain on sales of equity-method investment
                                                                   
      gain on sales of investment securities, net and equity-method investment
                    8,123,000                                               
      retirement defined benefits credit (expense)—other than service costs
                     1,139,000 1,058,000 1,216,000 2,435,000                                           
      gain on sale of investment securities
                        528,000   9,275,000                                        
      retirement defined benefits expense—other than service costs
                         -240,000 -1,102,000 -934,000 -543,000 -648,000 -1,168,250 -1,276,000 -1,833,000                                   
      dividends declared per common share
                                310 232.5 310 310                                
      merger termination fee
                                      90,000,000                             
      dividends per common share
                                    310 310 310 310 310 310 310 310 310 310 310 310 310 310 310 310 310 310    310 310 310 310 310 310 620 620 620 620 
      adjusted weighted-average shares
                                     108,309,000 108,472,000 107,781,000 107,738,000 107,694,000 103,567,000 103,026,000 101,825,000 102,165,000 99,818,000 99,249,000 98,540,000 97,518,000 96,979,000 96,561,000 93,414,000 92,848,000 91,653,000 91,494,000 90,692,000 84,842,000 84,155,000 83,614,000 82,640,000 82,124,000 81,713,000 37,676,000 37,377,000 36,627,000 36,406,000 
      other comprehensive income, net of taxes:
                                                                   
      net unrealized gains on available-for-sale investment securities:
                                                                   
      net unrealized gains on available-for-sale investment securities arising during the period, net of (taxes) benefits of 1,417, (2,543), (5,413) and (2,382) for the respective periods
                                     2,049,250 -2,147,000                             
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil, nil, 238 and nil for the respective periods
                                     -90,000                              
      derivatives qualified as cash flow hedges:
                                                                   
      effective portion of foreign currency hedge net unrealized gains, net of taxes of 205, nil, 368 and nil for the respective periods
                                     144,500 321,000                             
      less: reclassification adjustment to net income, net of (taxes) benefits of (110), 37, (75) and 112 for the respective periods
                                     -29,750 -173,000                             
      retirement benefit plans:
                                                                   
      less: amortization of prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 2,324, 3,583, 6,943 and 10,760 for the respective periods
                                     2,719,250 3,641,000                             
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 2,109, 3,243, 6,327 and 9,729 for the respective periods
                                     -2,483,500 -3,311,000                             
      other comprehensive income, net of taxes
                                     2,309,750 -1,669,000  4,430,000 -3,127,000 4,058,000 -1,311,000 2,900,000  -897,000   1,586,000 1,550,000                 
      comprehensive income attributable to hawaiian electric industries, inc.
                                     53,215,250 125,473,000  55,103,000 31,891,000 35,924,000 46,504,000 44,321,000  47,339,000 32,283,000                    
      net unrealized gains on available-for-sale investment securities arising during the period, net of (taxes) benefits of (2,543), 1,094, (2,382) and (2,249) for the respective periods
                                        3,851,000                           
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil, nil, nil and 1,132 for the respective periods
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 37, 37, 112 and 112 for the respective periods
                                        59,000   59,000                        
      less: amortization of prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 3,583, 1,900, 10,760, and 5,438 for the respective periods
                                        5,611,000                           
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 3,243, 1,619, 9,729 and 4,858 for the respective periods
                                        -5,091,000                           
      net unrealized gains on available-for-sale investment securities arising during the period, net of (taxes) benefits of 2,439, (1,679), 161 and (3,343) for the respective periods
                                         -3,694,000                          
      less: reclassification adjustment to net income, net of tax benefits of 38, 38, 75 and 75 for the respective periods
                                         59,000   59,000                       
      less: amortization of prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 3,691, 1,836, 7,177, and 3,632 for the respective periods
                                         5,780,000                          
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 3,359, 1,641, 6,486 and 3,239 for the respective periods
                                         -5,272,000                          
      net unrealized gains on available-for-sale investment securities arising during the period, net of tax benefits of 2,278 and 1,664 for the respective periods
                                          3,451,000                         
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil and 1,132 for the respective periods
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 37 for both periods
                                          59,000                         
      less: amortization of prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 3,486 and 1,796 for the respective periods
                                          5,459,000                         
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 3,127 and 1,598 for the respective periods
                                          -4,911,000                         
      net unrealized gains on securities:
                                                                   
      net unrealized gains on securities arising during the period, net of (taxes) tax benefits of 1,094, 1,049, (2,249) and 7,081 for the respective periods
                                           -1,657,000                        
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil, nil, 1,132 and 488 for the respective periods
                                                                   
      less: amortization of transition obligation, prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 1,900, 3,697, 5,438 and 11,173 for the respective periods
                                           2,829,000                        
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 1,619, 3,284, 4,858 and 9,852 for the respective periods
                                           -2,542,000                        
      net unrealized gains on securities arising during the period, net of (taxes) benefits of (1,679), 5,485, (3,343) and 6,032 for the respective periods
                                            2,543,000                       
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil, 488, 1,132 and 488 for the respective periods
                                                                   
      less: amortization of transition obligation, prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 1,742, 3,630, 3,632 and 7,476 for the respective periods
                                            2,873,000                       
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 1,641, 3,184, 3,239 and 6,568 for the respective periods
                                            -2,575,000                       
      interest expense—other than on deposit liabilities and other bank borrowings
                                              -20,304,000           -19,345,000  -19,249,000 -19,589,000 -19,282,000      
      net unrealized gains on securities arising during the period, net of (taxes) benefits of 1,049 and (689) for the three months ended september 30, 2013 and 2012 and 7,081 and (1,261) for the nine months ended september 30, 2013 and 2012, respectively
                                              -1,589,000                     
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil for the three months ended september 30, 2013 and 2012 and 488 and 53 for the nine months ended september 30, 2013 and 2012, respectively
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 37 for the three months ended september 30, 2013 and 2012 and 112 for the nine months ended september 30, 2013 and 2012
                                              59,000                     
      less: amortization of transition obligation, prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 3,697 and 2,443 for the three months ended september 30, 2013 and 2012 and 11,173 and 7,321 for the nine months ended september 30, 2013 and 2012, respectively
                                              5,789,000                     
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 3,284 and 2,129 for the three months ended september 30, 2013 and 2012 and 9,852 and 6,386 for the nine months ended september 30, 2013 and 2012, respectively
                                              -5,156,000                     
      net unrealized gains on securities arising during the period, net of (taxes) benefits of 5,485 and (721) for the three months ended june 30, 2013 and 2012 and 6,032 and (572) for the six months ended june 30, 2013 and 2012, respectively
                                                                   
      less: reclassification adjustment for net realized gains included in net income, net of taxes of 488 and 53 for the three months ended june 30, 2013 and 2012 and 488 and 53 for the six months ended june 30, 2013 and 2012, respectively
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 38 for the three months ended june 30, 2013 and 2012 and 75 for the six months ended june 30, 2013 and 2012
                                               59,000                    
      less: amortization of transition obligation, prior service credit and net incomees recognized during the period in net periodic benefit cost, net of tax benefits of 3,630 and 2,405 for the three months ended june 30, 2013 and 2012 and 7,476 and 4,878 for the six months ended june 30, 2013 and 2012, respectively
                                               5,680,000                    
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 3,184 and 2,095 for the three months ended june 30, 2013 and 2012 and 6,568 and 4,257 for the six months ended june 30, 2013 and 2012, respectively
                                                                   
      interest expense–other than on deposit liabilities and other bank borrowings
                                                      -19,678,000 -17,910,000 -17,833,000      -20,511,000     
      dilutive effect of share-based compensation
                                                 361,000 286,000 394,000 255,000 276,000              
      net unrealized gains on securities arising during the period, net of taxes of 689 and 1,917 for the three months ended september 30, 2012 and 2011 and 1,261 and 4,258 for the nine months ended september 30, 2012 and 2011, respectively
                                                 1,043,000                  
      less: reclassification adjustment for net realized gains included in net income, net of taxes of nil and 146 for the three months ended september 30, 2012 and 2011 and 53 and 148 for the nine months ended september 30, 2012 and 2011, respectively
                                                                   
      net unrealized holding losses arising during the period, net of taxes (benefits) of 5 and for the three and nine months ended september 30, 2011, respectively
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 37 and 37 for the three months ended september 30, 2012 and 2011 and 112 and 78 for the nine months ended september 30, 2012 and 2011, respectively
                                                 59,000                  
      less: amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of tax benefits of 2,443 and 1,405 for the three months ended september 30, 2012 and 2011 and 7,321 and 3,513 for the nine months ended september 30, 2012 and 2011, respectively
                                                 3,826,000                  
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 2,129 and 1,074 for the three months ended september 30, 2012 and 2011 and 6,386 and 3,875 for the nine months ended september 30, 2012 and 2011, respectively
                                                                   
      comprehensive income attributable to common shareholders
                                                 49,292,000 40,350,000                 
      net unrealized gains on securities arising during the period, net of taxes of 721 and 2,755 for the three months ended june 30, 2012 and 2011 and 572 and 2,341 for the six months ended june 30, 2012 and 2011, respectively
                                                  1,093,000                 
      less: reclassification adjustment for net realized gains included in net income, net of taxes of 53 and 2 for the three months ended june 30, 2012 and 2011 and 53 and 2 for the six months ended june 30, 2012 and 2011, respectively
                                                                   
      net unrealized holding gains arising during the period, net of taxes of 3 and 9 for the three and six months ended june 30, 2011, respectively
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 38 and 38 for the three months ended june 30, 2012 and 2011 and 75 and 41 for the six months ended june 30, 2012 and 2011, respectively
                                                  59,000                 
      less: amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of tax benefits of 2,405 and 1,477 for the three months ended june 30, 2012 and 2011 and 4,878 and 2,108 for the six months ended june 30, 2012 and 2011, respectively
                                                  3,768,000                 
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 2,095 and 1,370 for the three months ended june 30, 2012 and 2011 and 4,257 and 2,801 for the six months ended june 30, 2012 and 2011, respectively
                                                                   
      three months ended march 31
                                                                   
      net unrealized losses on securities:
                                                                   
      net unrealized losses on securities arising during the period, net of tax benefits, of 149 and 414 for the three months ended march 31, 2012 and 2011, respectively
                                                                   
      net unrealized holding losses arising during the period, net of tax benefits of 6 for the three months ended march 31, 2011
                                                                   
      less: reclassification adjustment to net income, net of tax benefits of 37 and 3 for the three months ended march 31, 2012 and 2011, respectively
                                                   59,000                
      less: amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of tax benefits of 2,473 and 631 for the three months ended march 31, 2012 and 2011, respectively
                                                   3,873,000                
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 2,162 and 1,431 for the three months ended march 31, 2012 and 2011, respectively
                                                   -3,395,000                
      expenses - sum
                                                    592,033,000 558,333,000 551,674,000 490,846,000 499,139,000 841,302,000 752,453,000 658,871,000 625,444,000 555,454,000 525,482,000 385,468,000 387,303,000 359,853,000 339,517,000 
      assets
                                                                   
      cash and cash equivalents
                                                    278,324,000               
      accounts receivable and unbilled revenues
                                                    266,701,000 233,885,000    370,481,000 323,011,000 298,304,000 276,786,000 250,990,000 220,894,000     
      available-for-sale investment and mortgage-related securities
                                                    623,965,000 584,485,000    766,045,000 887,162,000 2,086,037,000 2,160,841,000 2,301,360,000 2,405,250,000     
      investment in stock of federal home loan bank of seattle
                                                    97,764,000 97,764,000    97,764,000 97,764,000 97,764,000        
      loans receivable
                                                    3,573,131,000 3,623,127,000    4,159,007,000 4,121,379,000 4,153,950,000 4,020,112,000 3,887,739,000 3,816,387,000     
      property, plant and equipment, net of accumulated depreciation of 1,996,286 and 1,945,482
                                                    3,106,812,000               
      regulatory assets
                                                    424,614,000 426,146,000    273,640,000 278,645,000 283,498,000 142,675,000 132,605,000 117,078,000     
      goodwill
                                                    82,190,000 82,190,000    83,080,000 83,080,000 83,080,000        
      assets - sum
                                                    8,880,361,000 8,892,940,000    9,240,927,000 9,182,196,000 10,322,580,000 10,030,599,000 9,957,556,000 9,922,576,000     
      liabilities and stockholders’ equity
                                                                   
      liabilities
                                                                   
      accounts payable
                                                    164,538,000 189,149,000    256,759,000 248,173,000 213,966,000 219,737,000 171,941,000 172,554,000     
      interest and dividends payable
                                                    30,829,000               
      deposit liabilities
                                                    4,001,534,000 4,008,391,000    4,182,648,000 4,270,470,000 4,330,356,000 4,387,206,000 4,432,341,000 4,577,073,000     
      short-term borrowings—other than bank
                                                    55,012,000 60,238,000    230,566,000  199,281,000 101,097,000 125,465,000 123,414,000     
      other bank borrowings
                                                    256,515,000 294,154,000    683,452,000 634,148,000 1,789,157,000 1,731,799,000 1,718,027,000 1,590,563,000     
      long-term debt, net—other than bank
                                                    1,364,879,000 1,364,847,000    1,210,901,000  1,202,028,000 1,229,949,000 1,230,824,000 1,225,144,000     
      deferred income taxes
                                                    187,809,000 189,512,000    176,255,000 162,892,000 154,988,000 95,462,000 83,430,000 96,374,000     
      regulatory liabilities
                                                    293,299,000 297,332,000    282,308,000 275,835,000 268,890,000 257,817,000 251,198,000 245,440,000     
      contributions in aid of construction
                                                    326,050,000 323,090,000    304,977,000 302,925,000 300,847,000 286,403,000 281,944,000 277,499,000     
      liabilities - sum
                                                    7,379,435,000 7,405,204,000    7,886,034,000 7,851,063,000 8,984,277,000 8,865,882,000 8,814,865,000 8,791,715,000     
      preferred stock of subsidiaries - not subject to mandatory redemption
                                                    34,293,000 34,293,000    34,293,000 34,293,000   34,293,000 34,293,000     
      stockholders’ equity
                                                                   
      preferred stock, no par value, authorized 10,000,000 shares; issued: none
                                                                   
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 93,619,909 shares and 92,520,638 shares
                                                    1,289,471,000               
      retained earnings
                                                    183,015,000 182,646,000    223,294,000 212,275,000 233,213,000 210,344,000 216,063,000 223,946,000     
      accumulated other comprehensive loss, net of tax benefits
                                                         -13,728,000 -15,383,000 -13,470,000 -141,111,000 -156,227,000 -163,627,000     
      balance, december 31, 2009
                                                    92,521,000 92,521,000              
      comprehensive income:
                                                                   
      net unrealized gains on securities arising during the period, net of taxes of 1,747
                                                                   
      unrealized losses on derivatives qualified as cash flow hedges:
                                                                   
      unrealized holding loss arising during the period, net of tax benefits of 662
                                                                   
      amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 1,248
                                                                   
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of tax benefits of 1,080
                                                                   
      comprehensive income
                                                                   
      issuance of common stock
                                                    1,099,000 575,000              
      common stock dividends
                                                                   
      balance, june 30, 2010
                                                    93,620,000               
      balance, december 31, 2008
                                                    90,516,000 90,516,000              
      cumulative effect of adoption of a standard on other-than- temporary impairment recognition, net of taxes of 2,497
                                                                   
      net unrealized gains on securities arising during the period, net of taxes of 14,237
                                                                   
      net unrealized losses related to factors other than credit during the period, net of tax benefits of 5,147
                                                                   
      less: reclassification adjustment for net realized losses included in net income, net of tax benefits of 2,202
                                                                   
      amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 3,718
                                                                   
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of tax benefits of 3,333
                                                                   
      balance, june 30, 2009
                                                    91,562,000               
      revenues - sum
                                                     619,040,000 620,313,000 525,901,000 543,797,000 915,431,000 774,055,000 729,617,000 673,461,000 600,763,000 554,023,000 453,703,000 448,756,000 431,560,000 409,002,000 
      cash and equivalents
                                                     341,330,000    166,709,000 147,774,000 189,959,000 167,020,000 152,163,000 156,093,000     
      federal funds sold
                                                     702,000    35,039,000 10,433,000 17,184,000 59,009,000 75,144,000 84,804,000     
      property, plant and equipment, net of accumulated depreciation of 1,970,087 and 1,945,482
                                                     3,091,190,000              
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 93,095,818 shares and 92,520,638 shares
                                                     1,277,333,000              
      net unrealized gains on securities arising during the period, net of taxes of 696
                                                                   
      amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 609
                                                                   
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of tax benefits of 526
                                                                   
      balance, march 31, 2010
                                                     93,096,000              
      net unrealized gains on securities arising during the period, net of taxes of 5,711
                                                                   
      amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 1,862
                                                                   
      less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of tax benefits of 1,668
                                                                   
      balance, march 31, 2009
                                                     91,440,000              
      operating income - sum
                                                      68,639,000 35,055,000 44,658,000 74,129,000 21,602,000 70,746,000 48,017,000 45,309,000 28,541,000 68,235,000 61,453,000 71,707,000 69,485,000 
      less net income attributable to noncontrolling interest - preferred stock of subsidiaries
                                                      471,000 473,000 473,000           
      dividend per common share
                                                      310 310 310           
      dilutive effect of stock-based compensation
                                                      131,000 110,000 88,000 217,000 103,000 142,000   265,000     
      ratio of earnings to fixed charges
                                                                   
      excluding interest on asb deposits
                                                        2,310   2,310   1,220     
      including interest on asb deposits
                                                        1,870   1,900   1,140     
      income from before income taxes
                                                         57,706,000 5,883,000  29,946,000 27,342,000      
      property, plant and equipment, net of accumulated depreciation of 1,824,210 and 1,749,386
                                                         2,823,342,000          
      minority interests
                                                                   
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 85,080,748 shares and 83,431,513 shares
                                                         1,111,034,000          
      stockholders’ equity - sum
                                                         1,320,600,000 1,296,840,000 1,304,010,000 1,130,424,000 1,108,398,000 1,096,568,000     
      interest expense - other than on deposit liabilities and other bank borrowings
                                                          -18,186,000         
      property, plant and equipment, net of accumulated depreciation of 1,800,911, and 1,749,386
                                                          2,782,950,000         
      short-term borrowings - other than bank
                                                          221,952,000         
      long-term debt, net - other than bank
                                                          1,206,965,000         
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 84,646,451 shares and 83,431,513 shares
                                                          1,099,948,000         
      property, plant and equipment, net of accumulated depreciation of 1,775,790 and 1,749,386
                                                           2,761,396,000        
      preferred stock of subsidiaries—not subject to mandatory redemption
                                                           34,293,000 34,293,000       
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 83,956,023 shares and 83,431,513 shares
                                                           1,084,267,000        
      dilutive effect of stock options and dividend equivalents
                                                            159,000 217,000  160,000 182,000 192,000 217,000 
      investment in stock of federal home loan bank of seattle, at cost
                                                            97,764,000 97,764,000 97,764,000     
      property, plant and equipment, net of accumulated depreciation of 1,735,790 and 1,651,088
                                                            2,686,584,000       
      goodwill and other intangibles
                                                            85,622,000 87,130,000 86,645,000     
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 82,957,753 shares and 81,461,409 shares
                                                            1,061,191,000       
      property, plant and equipment, net of accumulated depreciation of 1,705,833 and 1,651,088
                                                             2,656,139,000      
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 82,391,429 shares and 81,461,409 shares
                                                             1,048,562,000      
      property, plant and equipment, net of accumulated depreciation of 1,675,912 and 1,651,088
                                                              2,641,227,000     
      common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 81,823,550 shares and 81,461,409 shares
                                                              1,036,249,000     
      interest expense–other than bank
                                                               -17,315,000    
      preferred securities distributions of trust subsidiaries
                                                               -4,008,000 -4,009,000 -4,008,000 -4,009,000 
      discontinued operations-loss from operations net of income tax benefits
                                                                   
      continuing operations
                                                               810 690 900 860 
      discontinued operations
                                                                -100   
      interest expense—other than bank
                                                                -17,879,000 -17,751,000 -18,340,000 
      discontinued operations-loss from operations, net of income taxes
                                                                -3,870,000   
      discontinued operations, net of income taxes
                                                                   
      income from operations
                                                                   
      net loss on disposals
                                                                   
      discontinued operations—loss from operations, net of income taxes
                                                                   
    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 2019-12-31 2019-09-30 2018-12-31 2018-09-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-03-31 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 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-09-30 2007-06-30 2007-03-31 2006-09-30 2006-06-30 2006-03-31 2005-09-30 2005-06-30 2005-03-31 2004-09-30 2004-06-30 2004-03-31 2003-09-30 2003-06-30 2003-03-31 2002-12-31 2002-09-30 
                                                                                    
        assets
                                                                                    
        current assets:
                                                                                    
        cash and cash equivalents
      452,840,000 501,778,000 548,242,000 154,285,000 629,338,000 435,455,000 1,159,635,000 550,408,000 485,192,000 679,546,000 667,129,000 314,284,000 315,334,000 199,877,000 175,280,000 159,672,000 301,704,000 305,551,000 227,923,000 247,443,000 277,579,000 341,421,000 193,126,000 574,482,000 196,813,000 176,988,000 169,208,000 172,054,000 244,785,000 261,881,000 202,173,000 210,381,000 234,230,000 278,452,000 334,743,000 228,417,000 300,687,000 292,168,000 192,555,000 188,377,000 269,120,000 215,042,000 153,712,000 262,708,000 168,512,000 207,549,000 236,346,000  283,483,000 266,746,000 316,254,000 330,651,000 387,488,000                          
        restricted cash
      478,968,000 478,968,000 478,968,000 482,603,000 482,480,000  13,645,000 16,422,000 17,531,000 15,028,000 15,164,000 5,104,000 4,216,000 5,050,000 3,898,000 5,386,000 5,912,000 5,911,000 9,412,000 10,618,000 14,067,000 17,558,000 21,881,000 29,376,000 30,872,000                                                      
        accounts receivable and unbilled revenues
      452,184,000 491,526,000 498,229,000 435,844,000 444,015,000  526,717,000 476,148,000 469,298,000 575,176,000 540,082,000 409,314,000 435,158,000 511,903,000 519,774,000 457,470,000 359,807,000 344,213,000 331,752,000 312,727,000 273,197,000 281,216,000 276,299,000 271,314,000 300,794,000 311,235,000 325,672,000 336,309,000 266,336,000 263,209,000 264,426,000 249,539,000 252,416,000 237,950,000 210,280,000 305,448,000 269,207,000 255,365,000 365,728,000 349,771,000 324,433,000 350,083,000 359,259,000 348,487,000 374,932,000 386,750,000 306,760,000  342,901,000 319,533,000 286,876,000 266,996,000 259,132,000  233,885,000     323,011,000 298,304,000 276,786,000 250,990,000 220,894,000 271,203,000 247,817,000 228,771,000 239,133,000 212,428,000 181,945,000 203,516,000 184,300,000 221,681,000 174,608,000 178,542,000 171,747,000  170,264,000 
        regulatory assets
      48,353,000 50,039,000 36,032,000 44,022,000 42,751,000  314,247,000 322,409,000 315,067,000 294,804,000 231,197,000 252,787,000 247,902,000 242,513,000 497,188,000 530,900,000 559,161,000 565,543,000 757,204,000 767,856,000 773,426,000 766,708,000 677,683,000 682,570,000 715,080,000 749,174,000 833,426,000 830,924,000 872,499,000 869,297,000 936,964,000 938,277,000 945,409,000 957,451,000 888,408,000 897,948,000 904,559,000 905,589,000 575,712,000 582,645,000 579,963,000 890,419,000 885,025,000 874,151,000 715,994,000 698,448,000 677,674,000  494,487,000 478,766,000 481,812,000 478,330,000 422,177,000  426,146,000 535,287,000 531,708,000 531,078,000  278,645,000 283,498,000 142,675,000 132,605,000 117,078,000 110,335,000 110,611,000 111,438,000 109,518,000 109,063,000 109,423,000    105,565,000 105,652,000 104,558,000  107,093,000 
        other
      341,975,000 305,999,000 296,351,000 305,098,000 347,790,000 681,460,000 1,088,417,000 1,057,165,000 915,205,000 877,959,000 826,020,000 795,214,000 812,836,000 824,536,000 886,999,000 883,594,000 777,694,000 747,469,000 691,857,000 668,368,000 639,505,000 629,149,000 591,258,000 556,793,000 649,885,000 576,263,000 530,364,000 596,481,000 526,744,000 513,535,000 474,444,000 478,763,000 467,160,000 447,621,000 415,955,000 453,099,000 493,151,000 481,531,000 505,226,000 557,684,000 537,841,000 475,335,000 454,898,000 527,820,000 573,523,000 566,734,000 538,443,000 95,363,000 496,638,000 494,527,000 462,258,000 487,614,000 478,406,000 96,523,000 412,121,000 69,400,000 59,413,000 54,713,000 103,235,000 449,998,000 351,408,000 334,186,000 316,522,000 296,434,000 424,712,000 443,294,000 425,892,000 474,220,000 455,981,000 433,428,000 405,954,000 376,486,000 417,918,000 360,689,000 367,017,000 345,858,000 3,454,000 336,395,000 
        assets held for sale
      55,596,000 56,266,000 55,878,000 118,399,000                                                                           
        total current assets
      1,829,916,000 1,884,576,000 1,913,700,000 1,540,251,000 1,946,374,000                                                   358,889,000 303,200,000 293,898,000                     
        noncurrent assets:
                                                                                    
        property, plant and equipment, net of accumulated depreciation
      6,237,196,000  6,155,343,000 6,060,000,000 6,138,288,000  6,296,088,000 6,298,721,000 6,183,503,000  5,917,342,000 5,868,408,000 5,778,571,000  5,599,937,000 5,429,420,000 5,411,746,000  5,335,130,000 5,310,162,000 5,283,768,000  5,232,177,000 5,181,427,000  5,006,394,000  4,694,101,000 4,542,558,000  4,813,875,000 4,726,524,000 4,641,514,000  4,423,567,000 4,317,121,000 4,269,241,000 4,190,835,000 4,048,106,000 3,980,096,000 3,908,392,000 3,776,305,000 3,701,905,000 3,640,308,000 3,506,489,000 3,436,021,000 3,375,654,000  3,248,658,000 3,204,996,000 3,175,375,000  3,131,198,000  3,091,190,000     2,782,950,000 2,761,396,000 2,686,584,000 2,656,139,000 2,641,227,000 2,605,392,000 2,582,633,000 2,558,800,000 2,488,603,000 2,452,775,000 2,433,453,000 2,372,884,000 2,344,396,000 2,324,270,000 2,083,812,000 2,079,267,000 2,075,007,000  2,059,411,000 
        operating lease right-of-use assets
      52,416,000 56,604,000 58,197,000 62,065,000 65,657,000  84,645,000 86,819,000 91,182,000 94,905,000 99,466,000 105,030,000 110,920,000 115,684,000 121,302,000 120,600,000 136,207,000 122,416,000 141,816,000 154,720,000 162,713,000 153,069,000 169,062,000 184,759,000 199,171,000 213,910,000                                                     
        defined benefit pension and other postretirement benefit plans asset
      219,730,000 219,211,000                                                                             
        total noncurrent assets
      7,084,287,000 7,038,303,000 6,899,936,000 6,784,610,000 6,819,807,000                                                                          
        total assets
      8,914,203,000 8,922,879,000 8,813,636,000 8,324,861,000 8,766,181,000  17,731,228,000 17,055,414,000 16,923,208,000 17,243,821,000 16,991,818,000 16,519,309,000 16,443,785,000 16,284,244,000 16,264,868,000 16,001,743,000 15,908,429,000 15,822,637,000 15,760,163,000 15,606,729,000 15,358,673,000 15,004,007,000 14,542,361,000 14,480,700,000 13,745,251,000 13,517,970,000 13,104,051,000 12,911,554,000 12,702,718,000 13,099,828,000 12,742,850,000 12,693,805,000 12,543,275,000 12,425,506,000 11,870,506,000 11,573,466,000 11,439,631,000 11,273,447,000 10,670,471,000 10,617,143,000 10,458,070,000 10,429,012,000 10,238,145,000 10,298,569,000 9,904,827,000 9,821,957,000 9,632,952,000 4,873,479,000 9,264,363,000 9,241,071,000 9,127,536,000 9,085,344,000 8,895,167,000 4,896,145,000     5,526,727,000                    
        liabilities and shareholders’ equity
                                                                                    
        current liabilities:
                                                                                    
        accounts payable
      220,103,000 219,062,000 217,329,000 232,944,000 207,115,000  255,634,000 248,668,000 248,806,000 247,462,000 256,323,000 253,954,000 237,822,000 251,460,000 213,587,000 244,239,000 240,296,000 205,544,000 195,223,000 175,060,000 164,936,000 182,347,000 158,292,000 142,113,000 220,633,000 189,244,000 214,773,000 167,192,000 190,221,000 193,714,000 160,897,000 194,755,000 160,819,000 143,279,000 119,288,000 152,896,000 183,094,000 167,784,000 177,495,000 176,379,000 210,511,000 206,803,000 175,038,000 253,096,000 234,304,000 231,871,000 183,733,000  165,909,000 168,187,000 162,748,000 202,446,000 142,971,000  189,149,000 118,042,000 110,113,000 107,146,000  248,173,000 213,966,000 219,737,000 171,941,000 172,554,000 178,132,000 188,241,000 183,852,000 182,470,000 146,022,000 168,087,000 173,573,000 153,071,000 143,583,000 157,420,000 173,763,000 142,565,000 8,108,000 151,543,000 
        interest and dividends payable
      49,142,000 31,458,000 34,691,000 23,921,000 39,317,000  50,076,000 34,528,000 61,452,000 51,206,000 57,901,000 33,294,000 41,382,000 21,333,000 36,158,000 20,661,000 33,519,000 19,889,000 33,307,000 20,284,000 32,405,000 23,547,000 34,271,000 24,396,000 24,941,000 32,338,000 28,254,000 30,280,000 29,786,000 25,837,000 26,484,000 22,124,000 27,407,000 25,225,000 27,890,000 25,914,000 25,360,000 25,225,000 26,051,000 25,315,000 28,520,000 27,232,000 25,503,000 26,358,000 27,907,000 24,897,000 23,778,000  28,010,000 29,593,000 27,496,000 27,814,000 31,318,000                          
        current portion of long-term debt
      124,990,000 124,959,000 143,472,000 143,438,000 414,897,000                                                                          
        regulatory liabilities
      35,562,000 51,997,000 37,642,000 27,396,000 28,071,000  1,191,099,000 1,175,609,000 1,159,811,000 1,150,690,000 1,101,773,000 1,087,356,000 1,069,551,000 1,055,650,000 1,030,376,000 1,008,075,000 1,003,444,000 996,768,000 975,512,000 966,477,000 956,139,000 959,786,000 967,846,000 977,780,000 972,310,000 963,740,000 950,236,000 932,352,000 895,093,000 880,770,000 466,216,000 431,630,000 419,940,000 410,693,000 383,793,000 362,251,000 357,089,000 351,712,000 357,090,000 354,980,000 350,916,000 337,720,000 336,065,000 325,527,000 319,330,000 317,958,000 316,560,000  313,299,000 309,809,000 304,375,000 296,797,000 289,568,000  297,332,000 282,239,000 300,450,000 294,814,000  275,835,000 268,890,000 257,817,000 251,198,000 245,440,000 235,480,000 229,928,000 224,598,000 213,230,000 208,172,000 202,568,000 82,595,000 77,191,000 76,090,000      
        wildfire related claims
      526,500,000 530,000,000 526,500,000                                                                            
        liabilities held for sale
      60,607,000 59,803,000 59,075,000 114,399,000                                                                           
        total current liabilities
      1,367,891,000 1,427,737,000 1,420,743,000 1,439,090,000 1,559,019,000                                                   353,438,000 441,490,000 378,118,000                     
        noncurrent liabilities:
                                                                                    
        long-term debt
      2,280,388,000 2,285,016,000 2,295,219,000 1,863,936,000 2,203,066,000                                                   1,057,784,000 907,733,000 907,681,000        1,033,089,000 1,133,041,000 1,173,009,000 1,168,079,000 1,168,873,000 1,167,108,000 1,166,602,000 1,389,510,000 1,063,790,000 1,063,464,000 1,189,265,000 401,000,000 1,083,517,000 
        operating lease liabilities
      38,619,000 43,278,000 45,610,000 49,768,000 54,469,000  91,781,000 94,565,000 99,611,000 103,900,000 108,681,000 114,827,000 121,323,000 126,604,000 130,914,000 136,445,000 151,832,000 136,760,000 155,608,000 167,997,000 175,334,000 160,432,000 176,258,000 191,058,000 199,571,000 213,166,000                                                     
        finance lease liabilities
      502,526,000 505,590,000 509,776,000 462,439,000 465,881,000  441,089,000 443,366,000 350,290,000 339,040,000 122,320,000 123,240,000 88,024,000 48,709,000 49,202,000                                                                
        defined benefit pension liability
      23,612,000                                                                              
        wildfire tort-related claims
      1,436,250,000 1,436,250,000 1,436,250,000 478,750,000 478,750,000  1,915,000,000 1,712,000,000                                                                       
        total noncurrent liabilities
      5,908,943,000 5,889,223,000 5,794,764,000 5,317,046,000 5,666,993,000                                                                          
        total liabilities
      7,276,834,000 7,316,960,000 7,215,507,000 6,756,136,000 7,226,012,000  16,119,894,000 15,935,848,000 14,511,535,000 14,864,687,000 14,733,171,000 14,235,639,000 14,171,537,000 14,047,452,000 14,067,653,000 13,733,946,000 13,570,494,000 13,397,460,000 13,342,327,000 13,205,107,000 13,003,087,000 12,632,212,000 12,184,837,000 12,155,009,000 11,430,698,000 11,240,988,000 10,907,478,000 10,745,216,000 10,576,648,000 10,968,149,000 10,605,535,000 10,584,483,000 10,443,394,000 10,324,460,000 9,894,034,000 9,618,172,000 9,506,818,000 9,341,245,000 8,834,770,000 8,821,971,000 8,677,849,000 8,739,254,000 8,579,203,000 8,657,011,000 8,263,399,000 8,211,888,000 8,044,561,000  7,692,312,000 7,694,571,000 7,596,692,000 7,567,414,000 7,381,221,000                          
        commitments and contingencies
                                                                                    
        shareholders’ equity
                                                                                    
        preferred stock, no par value, authorized 10,000,000 shares; issued: none
                                                                                    
        common stock
      2,269,261,000 2,268,187,000 2,267,288,000 2,267,897,000 2,265,120,000  2,266,282,000 1,709,472,000 1,707,689,000 1,707,471,000 1,704,447,000 1,696,258,000 1,692,390,000 1,692,697,000 1,689,672,000 1,688,009,000 1,684,547,000 1,685,496,000 1,683,090,000 1,681,820,000 1,678,973,000 1,678,368,000 1,678,007,000 1,676,616,000 1,678,257,000 1,676,411,000 1,669,267,000 1,667,371,000 1,663,149,000 1,662,491,000 1,661,492,000 1,660,403,000 1,658,280,000 1,660,910,000 1,635,890,000 1,627,259,000 1,626,569,000 1,624,549,000 1,519,256,000 1,493,436,000 1,491,338,000 1,443,583,000 1,429,371,000 1,413,700,000 1,389,607,000 1,377,426,000 1,362,880,000  1,347,255,000 1,343,537,000 1,329,901,000 1,314,199,000 1,301,710,000  1,277,333,000 85,387,000 85,387,000 85,387,000  1,099,948,000 1,084,267,000 1,061,191,000 1,048,562,000 1,036,249,000 1,025,312,000 1,023,564,000 1,020,161,000 1,018,170,000 1,017,272,000 1,012,004,000 1,007,754,000 1,004,329,000 1,002,455,000 876,804,000 864,038,000 849,222,000 839,503,000 831,591,000 
        retained earnings
      -635,156,000 -665,606,000 -705,413,000 -736,160,000 -762,245,000  -431,044,000 -326,642,000 968,842,000 926,720,000 877,931,000 876,268,000 861,105,000 845,830,000 826,794,000 803,027,000 788,787,000 757,921,000 740,566,000 714,317,000 687,600,000 660,398,000 645,943,000 616,941,000 622,042,000 590,651,000 543,623,000 527,802,000 483,342,000 476,836,000 470,750,000 444,400,000 439,452,000 438,972,000 323,751,000 315,759,000 298,398,000 296,680,000 296,146,000 280,126,000 270,173,000 247,568,000 230,067,000 220,049,000 233,218,000 215,626,000 210,044,000  197,165,000 178,513,000 180,960,000 181,910,000 186,425,000  182,646,000 825,975,000 811,082,000 806,186,000  212,275,000 233,213,000 210,344,000 216,063,000 223,946,000 251,768,000 244,645,000 242,605,000 222,969,000 210,573,000 208,073,000 209,170,000 191,464,000 205,142,000 183,735,000 176,451,000 177,590,000 176,118,000 171,299,000 
        accumulated other comprehensive income, net of taxes
      3,264,000  1,961,000 2,695,000 3,001,000                                                                          
        total shareholders’ equity
      1,637,369,000 1,605,919,000 1,563,836,000 1,534,432,000 1,505,876,000  1,577,041,000 1,085,273,000 2,377,380,000 2,344,841,000 2,224,354,000 2,249,377,000 2,237,955,000 2,202,499,000 2,162,922,000 2,233,504,000 2,303,642,000 2,390,884,000 2,383,543,000 2,367,329,000 2,321,293,000 2,337,502,000 2,323,231,000 2,291,398,000 2,280,260,000 2,242,689,000 2,162,280,000 2,132,045,000 2,091,777,000 2,097,386,000 2,103,022,000 2,075,029,000 2,065,588,000 2,066,753,000 1,942,179,000 1,921,001,000 1,898,520,000 1,897,909,000 1,801,408,000 1,760,879,000 1,745,928,000 1,655,465,000 1,624,649,000 1,607,265,000 1,607,135,000 1,575,776,000 1,554,098,000  1,537,758,000 1,512,207,000 1,496,551,000 1,483,637,000                           
        total liabilities and shareholders’ equity
      8,914,203,000 8,922,879,000 8,813,636,000 8,324,861,000 8,766,181,000  17,731,228,000 17,055,414,000 16,923,208,000 17,243,821,000 16,991,818,000 16,519,309,000 16,443,785,000 16,284,244,000 16,264,868,000 16,001,743,000 15,908,429,000 15,822,637,000 15,760,163,000 15,606,729,000 15,358,673,000 15,004,007,000 14,542,361,000 14,480,700,000 13,745,251,000 13,517,970,000 13,104,051,000 12,911,554,000 12,702,718,000 13,099,828,000 12,742,850,000 12,693,805,000 12,543,275,000 12,425,506,000 11,870,506,000 11,573,466,000 11,439,631,000 11,273,447,000 10,670,471,000 10,617,143,000 10,458,070,000 10,429,012,000 10,238,145,000 10,298,569,000 9,904,827,000 9,821,957,000 9,632,952,000  9,264,363,000 9,241,071,000 9,127,536,000 9,085,344,000                           
        property, plant and equipment
                                                                                  2,089,000  
        land
                                                             51,401,000 51,408,000 42,541,000                     
        plant and equipment
                                                             4,612,113,000 4,419,824,000 4,305,782,000                     
        right-of-use assets - finance lease
                                                                                    
        construction in progress
                                                             155,465,000 293,812,000 319,362,000                     
        less – accumulated depreciation
       6,188,372,000        6,150,126,000    5,687,003,000    5,392,068,000    5,265,735,000   5,109,628,000  4,830,118,000   5,025,916,000    4,603,465,000                                             
        december 31
       2,025,000                                                                             
        short-term borrowings
         49,312,000 48,738,000                                                             296,493,000 182,584,000 120,642,000 126,888,000 100,107,000 8,392,000 14,197,000 22,992,000     29,829,000 
        defined benefit plans liability
       23,656,000 23,080,000 23,081,000 23,095,000                                                                          
        preferred stock of subsidiaries - not subject to mandatory redemption
        34,293,000 34,293,000 34,293,000  34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000 34,293,000  34,293,000 34,293,000 34,293,000 34,293,000 34,293,000  34,293,000     34,293,000   34,293,000 34,293,000 34,293,000 34,293,000  34,293,000 34,293,000 34,405,000   34,406,000  34,406,000 34,406,000  34,406,000 
        unrealized gains on derivatives
                                                                                    
        retirement benefit plans
       3,338,000        -289,350,000    -336,028,000    -52,533,000    -1,264,000                   -12,259,000 -34,402,000                                     
        cash and due from banks
           184,383,000                                                                         
        interest-bearing deposits
           251,072,000                                                                         
        investment securities
                                                                                    
        available-for-sale, at fair value
           1,136,439,000                                                                         
        held-to-maturity, at amortized cost
           1,201,314,000                                                                         
        stock in federal home loan bank, at cost
           14,728,000 29,204,000 29,204,000 32,489,000 14,728,000 18,000,000 18,000,000 10,000,000 26,560,000 15,000,000 13,200,000 10,000,000 10,000,000 10,000,000 10,000,000 10,000,000 8,680,000 10,920,000 9,880,000 8,434,000 9,953,000 9,958,000 8,158,000 10,158,000 9,706,000 9,706,000 11,706,000 11,706,000 11,218,000 11,218,000 10,678,000 10,678,000                                          
        loans held for investment
           6,180,810,000 5,972,614,000 5,963,345,000 6,045,665,000 6,106,438,000 6,114,640,000 6,069,114,000 5,988,058,000 5,906,690,000 5,616,984,000 5,357,539,000 5,117,522,000 5,139,984,000 5,046,180,000 5,106,207,000 5,218,288,000 5,232,642,000 5,389,443,000 5,356,510,000 5,067,821,000 5,031,296,000 4,790,902,000 4,700,232,000 4,688,129,000                                                  
        allowance for credit losses
           -74,372,000                                                                         
        net loans
           6,106,438,000                                                                         
        loans held for sale, at lower of cost or fair value
           15,168,000 2,704,000 13,904,000 2,923,000 15,168,000 2,171,000 6,910,000 660,000 824,000 3,101,000 3,738,000 7,961,000 10,404,000 53,998,000 50,877,000 23,637,000 28,275,000 16,806,000 37,143,000 12,286,000 17,115,000 1,805,000 1,036,000 7,379,000 11,250,000 15,728,000 5,261,000 10,454,000 18,817,000 7,900,000 5,598,000 5,581,000 9,906,000 2,328,000 956,000 4,363,000 5,829,000 34,073,000 5,351,000 16,495,000 11,915,000 14,657,000  25,016,000 4,784,000 4,308,000 7,849,000                           
        goodwill
           82,190,000   82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000 82,190,000  82,190,000 82,190,000 82,190,000 82,190,000 82,190,000  82,190,000     83,080,000 83,080,000                  
        total assets of discontinued operations1
           9,673,192,000                                                                         
        liabilities and shareholder’s equity
                                                                                    
        deposit liabilities–noninterest-bearing
           2,599,762,000                                                                         
        deposit liabilities–interest-bearing
           5,546,016,000                                                                         
        other borrowings
           750,000,000                                          247,121,000      273,526,000     647,718,000       1,671,655,000 1,623,287,000            
        total liabilities of discontinued operations1
           9,143,341,000                                                                         
        available-for-sale investment securities, at fair value
            1,084,083,000 1,061,687,000 1,091,889,000 1,136,439,000 1,266,412,000 1,368,037,000 1,419,755,000 1,429,667,000 2,232,336,000 2,444,267,000 2,621,375,000 2,574,618,000 2,580,830,000 2,509,906,000 2,305,257,000 1,970,417,000 1,747,658,000 1,389,633,000 1,232,826,000 1,210,748,000 1,388,533,000 1,387,571,000 1,418,490,000 1,401,198,000 1,320,110,000 1,302,886,000 1,228,922,000 1,105,182,000 906,295,000 785,837,000 693,520,000 590,648,000                                         
        held-to-maturity investment securities, at amortized cost
            1,159,229,000 1,179,182,000 1,191,074,000 1,201,314,000 1,212,005,000 1,224,917,000 1,238,185,000 1,251,747,000 510,879,000 513,767,000 517,150,000 522,270,000 491,871,000 375,655,000 295,046,000 226,947,000 133,858,000 124,623,000 139,451,000 132,704,000 141,875,000 102,498,000 43,450,000 44,515,000                                                 
        liabilities
                                                                                    
        deposit liabilities
            7,999,210,000 8,036,473,000 8,005,064,000 8,145,778,000 8,224,351,000 8,163,235,000 8,230,601,000 8,169,696,000 8,258,885,000 8,253,536,000 8,289,272,000 8,172,212,000 7,976,538,000 7,873,430,000 7,745,294,000 7,386,957,000 7,038,137,000 7,029,952,000 6,271,902,000 6,196,223,000 6,158,852,000 6,130,415,000 6,079,067,000 5,890,597,000 5,752,326,000 5,724,386,000 5,675,090,000 5,548,929,000 5,139,932,000 4,825,954,000 4,803,271,000 4,751,328,000 4,533,797,000 4,524,860,000 4,477,987,000 4,310,842,000 4,276,243,000 4,312,620,000 4,126,788,000 4,136,741,000 4,125,204,000  4,062,801,000 4,054,949,000 4,035,255,000 3,975,372,000 3,958,636,000  4,008,391,000     4,270,470,000 4,330,356,000 4,387,206,000 4,432,341,000 4,577,073,000 4,540,124,000 4,546,855,000 4,610,399,000 4,551,837,000 4,453,322,000 4,366,878,000 4,182,409,000 4,078,228,000 4,022,367,000 3,952,662,000 3,886,842,000 3,815,201,000  3,749,455,000 
        other bank borrowings
            520,000,000 520,000,000 593,000,000 750,000,000 750,000,000 750,000,000 680,690,000 695,120,000 409,040,000 241,610,000 137,385,000 88,305,000 129,305,000 129,665,000 102,685,000 89,670,000 151,875,000 124,975,000 115,110,000 129,190,000 110,040,000 71,110,000 100,430,000 190,859,000 153,552,000 188,130,000 200,154,000 192,618,000 329,081,000 368,593,000 314,157,000 312,094,000 263,204,000 242,455,000 244,642,000 239,612,000 187,884,000 193,233,000 211,219,000 218,673,000 232,843,000  237,934,000 239,122,000 244,674,000 237,319,000 246,571,000  294,154,000     634,148,000 1,789,157,000 1,731,799,000 1,718,027,000 1,590,563,000 1,511,956,000              
        long-term debt, net—other than bank
            2,836,539,000 2,838,224,000 2,837,875,000 2,842,429,000 2,944,589,000 2,572,375,000 2,480,948,000 2,384,980,000 2,430,326,000 2,374,500,000 2,316,046,000 2,321,937,000 2,244,795,000 2,258,043,000 2,229,738,000 2,119,129,000 2,068,852,000 2,070,224,000 1,964,365,000 1,885,454,000 1,879,641,000 1,782,242,000 1,684,002,000 1,683,797,000 1,618,446,000 1,618,647,000 1,618,651,000 1,619,019,000 1,578,618,000 1,506,546,000 1,506,546,000 1,506,546,000 1,517,946,000 1,517,945,000 1,492,945,000 1,422,880,000 1,422,877,000 1,422,875,000 1,429,869,000 1,429,653,000 1,282,602,000  1,340,038,000 1,440,006,000 1,439,974,000 1,364,942,000 1,364,911,000  1,364,847,000      1,202,028,000 1,229,949,000 1,230,824,000 1,225,144,000 1,133,137,000              
        deferred income taxes
              299,012,000 297,954,000 258,942,000 272,988,000 273,081,000 262,462,000 263,929,000 302,346,000 340,246,000 384,760,000 378,139,000 384,953,000 380,365,000 395,089,000 376,356,000 368,834,000 379,324,000 393,140,000 372,518,000 385,651,000 381,478,000 388,430,000 756,814,000 750,413,000 740,506,000 728,806,000 700,782,000 643,951,000 632,718,000 640,778,000 585,432,000 579,222,000 538,321,000 493,662,000 474,197,000 459,249,000 438,886,000 396,806,000 375,510,000  342,232,000 316,843,000 291,470,000 278,958,000 253,284,000  189,512,000 178,336,000 173,251,000 164,788,000  162,892,000 154,988,000 95,462,000 83,430,000 96,374,000 197,800,000 183,420,000 195,874,000 234,339,000 226,845,000 214,960,000 233,962,000 209,805,000 233,607,000 219,556,000 226,249,000 230,689,000  229,043,000 
        defined benefit pension and other postretirement benefit plans liability
            83,007,000 82,794,000 84,554,000 82,879,000 70,785,000 70,979,000 71,394,000 71,813,000 333,664,000 341,535,000 341,845,000 348,072,000 543,285,000 548,840,000 558,191,000 567,438,000 488,314,000 514,415,000 513,287,000 534,670,000 538,384,000 496,753,000 502,304,000 509,514,000 620,788,000 626,795,000 632,964,000 638,854,000 584,490,000 607,682,000 615,945,000 624,555,000 274,909,000 278,427,000 284,043,000 630,904,000 639,898,000                                    
        accumulated other comprehensive loss, net of tax benefits
            -258,197,000 -297,557,000 -299,151,000  -358,024,000 -323,149,000 -315,540,000  -353,544,000 -257,532,000 -169,692,000  -40,113,000 -28,808,000 -45,280,000  -719,000 -2,159,000  -24,373,000  -63,128,000 -54,714,000  -29,220,000 -29,774,000 -32,144,000  -17,462,000 -22,017,000 -26,447,000 -23,320,000 -13,994,000 -12,683,000                    -15,383,000 -13,470,000 -141,111,000 -156,227,000 -163,627,000 -39,073,000 -63,068,000 -51,244,000 -27,781,000           
        short-term borrowings—other than bank
                 46,212,000 148,802,000 172,568,000 171,125,000 124,017,000 71,491,000 53,998,000 92,246,000 95,748,000 100,242,000 129,379,000 137,783,000 131,180,000 185,710,000 163,836,000 73,992,000 203,359,000 238,445,000 117,945,000 24,498,000 49,789,000 2,300,000  95,485,000 171,992,000 124,543,000 30,500,000 150,576,000 185,175,000 136,369,000 131,341,000 125,786,000 133,937,000 82,219,000 96,240,000 156,288,000  51,195,000   24,923,000 27,296,000  60,238,000      199,281,000 101,097,000 125,465,000 123,414,000 194,211,000              
        net unrealized losses on securities
                                              -2,858,000                                      
        8,420,198
                                                                                    
        net unrealized gains on securities
                                               -701,000 888,000                                    
        unrealized losses on derivatives
                                              -466,000 -583,000 -642,000                                    
        8,168,879
                                                                                    
        7,489,348
                                                                                    
        loans receivable held for investment
                                   4,617,131,000 4,623,234,000 4,688,278,000 4,669,274,000 4,683,160,000 4,589,950,000 4,487,130,000 4,410,817,000 4,401,504,000 4,291,960,000 4,245,240,000 4,147,537,000 4,005,132,000 3,912,630,000 3,803,002,000 3,705,748,000 3,695,474,000 3,672,401,000  3,622,181,000 3,580,418,000 3,549,750,000 3,489,880,000                           
        7,579,211
                                                                                    
        contributions in aid of construction
                                   565,668,000 565,118,000 543,204,000 541,574,000 543,525,000 513,520,000 495,667,000 482,760,000 474,385,000 448,811,000 442,379,000 438,020,000 425,916,000 419,337,000 415,795,000 387,863,000 381,206,000 378,039,000  344,110,000 339,489,000 338,070,000 335,364,000 331,405,000  323,090,000 315,455,000 314,369,000 312,933,000  302,925,000 300,847,000 286,403,000 281,944,000 277,499,000 265,739,000 262,036,000 260,692,000 242,505,000 236,330,000 234,433,000 231,118,000 231,551,000 232,642,000 221,242,000 220,630,000 220,340,000  212,814,000 
        7,047,813
                                                                                    
        stock in federal home loan bank of seattle, at cost
                                           63,711,000                                         
        available-for-sale investment and mortgage-related securities
                                            531,603,000 549,321,000 517,534,000 535,264,000 560,172,000 659,400,000 664,051,000 639,112,000 631,063,000  571,045,000 711,347,000 670,949,000 678,152,000 570,262,000  584,485,000     887,162,000 2,086,037,000 2,160,841,000 2,301,360,000 2,405,250,000 2,357,012,000 2,506,444,000 2,609,160,000 1,929,433,000 1,913,565,000 1,907,712,000 1,998,549,000 1,870,117,000 1,836,455,000 1,800,552,000 1,791,487,000 1,799,368,000  2,011,842,000 
        investment in stock of federal home loan bank of seattle
                                            75,063,000 80,863,000 86,697,000 93,413,000 94,281,000 95,152,000 96,893,000 97,764,000 97,764,000  97,764,000 97,764,000 97,764,000 97,764,000 97,764,000  97,764,000     97,764,000 97,764,000                  
        retirement benefits liability
                                                 643,104,000 497,388,000 497,687,000 513,187,000         399,539,000 395,204,000 392,351,000                     
        assets:
                                                                                    
        other investments 1
                                                     233,909,000           108,818,000                    
        investment and mortgage-related securities
                                                     637,123,000      574,932,000     868,530,000                    
        loans receivable 2
                                                     3,618,527,000           4,156,656,000                    
        total interest-earning assets 3
                                                     4,489,559,000                               
        allowance for loan losses
                                                     -39,263,000      -41,485,000     -30,334,000                    
        non-interest-earning assets
                                                     423,183,000      407,839,000     423,057,000                    
        liabilities and shareholder’s equity:
                                                                                    
        interest-bearing demand and savings deposits
                                                     2,516,606,000      2,412,104,000     2,093,666,000                    
        time certificates
                                                     598,360,000      791,248,000     1,425,334,000                    
        total interest-bearing deposits
                                                     3,114,966,000      3,203,352,000     3,519,000,000                    
        total interest-bearing liabilities
                                                     3,362,087,000      3,476,878,000     4,166,718,000                    
        non-interest bearing liabilities:
                                                                                    
        deposits
                                                     916,957,000      818,568,000     701,062,000                    
        shareholder’s equity
                                                     499,072,000                               
        total liabilities and shareholder’s equity
                                                     4,873,479,000                               
        net interest income
                                                     185,121,000      47,704,000     52,312,000                    
        net interest margin (%) 4
                                                     4,120                               
        less — accumulated depreciation
                                                         3,165,918,000                           
        loans receivable
                                                          3,466,550,000 3,641,540,000 3,623,127,000     4,121,379,000 4,153,950,000 4,020,112,000 3,887,739,000 3,816,387,000 3,763,823,000 3,717,501,000 3,618,246,000 3,501,540,000 3,427,687,000 3,330,571,000 3,126,277,000 3,096,010,000 3,075,478,000 3,142,148,000 3,120,846,000 3,038,671,000  2,885,007,000 
        liabilities and stockholders’ equity
                                                                                    
        stockholders’ equity
                                                             1,246,686,000 1,231,740,000 1,226,790,000                     
        total stockholders’ equity
                                                          1,479,653,000                          
        total liabilities and stockholders’ equity
                                                          8,895,167,000                          
        other investments
                                                           313,319,000                         
        total interest-earning assets
                                                           4,529,791,000     5,134,004,000                    
        liabilities and stockholder’s equity:
                                                                                    
        stockholder’s equity
                                                           504,176,000     555,712,000                    
        total liabilities and stockholder’s equity
                                                           4,896,145,000     5,526,727,000                    
        net interest margin
                                                           4,220                         
        cash and equivalents
                                                            341,330,000 6,486,000 3,676,000 4,227,000  147,774,000 189,959,000 167,020,000 152,163,000 156,093,000 146,917,000 144,945,000 155,382,000 165,395,000 168,330,000 203,398,000 171,631,000 192,481,000 322,914,000 199,601,000 213,774,000 316,481,000 25,059,000 251,467,000 
        federal funds sold
                                                            702,000     10,433,000 17,184,000 59,009,000 75,144,000 84,804,000 44,667,000 81,121,000 85,232,000 67,080,000 58,064,000 36,060,000 75,941,000 20,087,000 50,258,000 34,677,000     
        balance, december 31, 2009
                                                            92,521,000                        
        comprehensive income:
                                                                                    
        net income for common stock
                                                                                    
        net unrealized gains on securities arising during the period, net of taxes of 696
                                                                                    
        retirement benefit plans:
                                                                                    
        amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 609
                                                                                    
        less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of tax benefits of 526
                                                                                    
        comprehensive income
                                                                                    
        issuance of common stock
                                                            575,000     1,214,000 524,000 1,497,000 930,000 363,000               
        common stock dividends
                                                                                    
        balance, march 31, 2010
                                                            93,096,000                        
        balance, december 31, 2008
                                                            90,516,000                        
        net unrealized gains on securities arising during the period, net of taxes of 5,711
                                                                                    
        amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 1,862
                                                                                    
        less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of tax benefits of 1,668
                                                                                    
        balance, march 31, 2009
                                                            91,440,000                        
        utility plant, at cost
                                                                                    
        less accumulated depreciation
                                                             -1,822,860,000 -1,796,263,000 -1,767,821,000                     
        net utility plant
                                                             2,996,119,000 2,968,781,000 2,899,864,000                     
        current assets
                                                                                    
        customer accounts receivable
                                                             133,709,000 108,242,000 93,699,000                     
        accrued unbilled revenues
                                                             92,361,000 78,505,000 79,170,000                     
        other accounts receivable
                                                             8,208,000 7,716,000 7,510,000                     
        fuel oil stock, at average cost
                                                             67,889,000 55,332,000 62,687,000                     
        materials and supplies, at average cost
                                                             36,357,000 35,072,000 35,809,000                     
        prepayments and other
                                                             13,879,000 14,657,000 10,796,000                     
        other long-term assets
                                                                                    
        unamortized debt expense
                                                             15,184,000 13,880,000 14,194,000                     
        total other long-term assets
                                                             619,871,000 605,001,000 599,985,000                     
        capitalization and liabilities
                                                                                    
        capitalization
                                                                                    
        premium on capital stock
                                                             299,207,000 299,210,000 299,214,000                     
        accumulated other comprehensive income, net of income taxes
                                                             1,824,000 1,768,000 1,710,000                     
        common stock equity
                                                             1,212,393,000 1,197,447,000 1,192,497,000                     
        cumulative preferred stock – not subject to mandatory redemption
                                                             22,293,000 22,293,000 22,293,000                     
        noncontrolling interest – cumulative preferred stock of subsidiaries – not subject to mandatory redemption
                                                             12,000,000 12,000,000 12,000,000                     
        total capitalization
                                                             2,304,470,000 2,139,473,000 2,134,471,000                     
        current liabilities
                                                                                    
        short-term borrowings–affiliate
                                                             10,700,000 45,604,000 29,339,000                     
        interest and preferred dividends payable
                                                             21,096,000 16,158,000 18,552,000                     
        taxes accrued
                                                             155,211,000 158,565,000 169,207,000                     
        deferred credits and other liabilities
                                                                                    
        unamortized tax credits
                                                             57,885,000 56,973,000 61,059,000                     
        total deferred credits and other liabilities
                                                             1,001,516,000 981,650,000 968,225,000                     
        short-term borrowings–nonaffiliates
                                                              55,000,000                      
        net interest margin (%) 3
                                                                4,080                    
        short-term borrowings - other than bank
                                                                 221,952,000                   
        long-term debt, net - other than bank
                                                                 1,206,965,000                   
        minority interests
                                                                                    
        balance, december 31, 2007
                                                                 83,432,000 83,432,000                  
        net income
                                                                      32,323,000 27,224,000 32,337,000 37,490,000 27,580,000 24,095,000 42,672,000 11,238,000 30,932,000 30,522,000 21,890,000  118,217,000 7,134,000 
        net unrealized losses on securities:
                                                                                    
        net unrealized losses on securities arising during the period, net of tax benefits of 2,847
                                                                                    
        less: reclassification adjustment for net realized losses included in net income, net of tax benefits of 6,915
                                                                                    
        amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 1,848
                                                                                    
        less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 1,668
                                                                                    
        balance, june 30, 2008
                                                                 84,646,000                   
        balance, december 31, 2006
                                                                 81,461,000 81,461,000 81,461,000 81,461,000 81,461,000               
        net unrealized losses on securities arising during the period, net of tax benefits of 1,989
                                                                                    
        retirement benefit plans - amortization of net income, prior service cost and transition obligation included in net periodic benefit cost, net of taxes of 2,622
                                                                                    
        adjustment to initially apply a puc d&o related to defined benefit retirement plans, net of taxes of 11,595
                                                                                    
        adjustment to initially apply fin 48
                                                                                    
        balance, june 30, 2007
                                                                 82,391,000   82,391,000                
        preferred stock of subsidiaries—not subject to mandatory redemption
                                                                  34,293,000 34,293,000     34,293,000    34,406,000 34,406,000       
        net unrealized gains on securities arising during the period, net of taxes of 5,808
                                                                                    
        less: reclassification adjustment for net realized gains included in net income, net of taxes of 372
                                                                                    
        amortization of net income, prior service gain and transition obligation included in net periodic benefit cost, net of taxes of 923
                                                                                    
        less: reclassification adjustment for impact of d&os of the puc included in regulatory assets, net of taxes of 834
                                                                                    
        balance, march 31, 2008
                                                                  83,956,000                  
        net unrealized gains on securities arising during the period, net of taxes of 6,406
                                                                                    
        defined benefit pension plans—amortization of net income, prior service gain and transition obligation included in net periodic pension cost, net of taxes of 1,400
                                                                                    
        balance, march 31, 2007
                                                                  81,824,000   81,824,000               
        investment in stock of federal home loan bank of seattle, at cost
                                                                   97,764,000 97,764,000 97,764,000 97,764,000 97,764,000 97,764,000            
        goodwill and other intangibles
                                                                   85,622,000 87,130,000 86,645,000 88,011,000 88,598,000 89,023,000 89,696,000 90,140,000 90,781,000 92,185,000 93,200,000 93,114,000 95,271,000 93,947,000   97,947,000 
        net unrealized gains on securities arising during the period, net of taxes of 6,748
                                                                                    
        defined benefit retirement plans - amortization of net income, prior service cost and transition obligation included in net periodic benefit cost, net of taxes of 3,825
                                                                                    
        adjustment to initially apply a puc interim d&o related to defined benefit retirement plans, net of taxes of 11,595
                                                                                    
        balance, september 30, 2007
                                                                   82,958,000                 
        balance, december 31, 2005
                                                                   80,983,000 80,983,000 80,983,000               
        net unrealized losses arising during the period, net of income tax benefits of 164
                                                                                    
        less: reclassification adjustment for net realized gains included in net income, net of income taxes of 690
                                                                                    
        minimum pension liability adjustment, net of tax benefits of 30
                                                                                    
        balance, september 30, 2006
                                                                   81,350,000                 
        defined benefit retirement plans—amortization of net income, prior service cost and transition obligation included in net periodic benefit cost, net of taxes of 2,622
                                                                                    
        net unrealized losses on securities arising during the period, net of tax benefits of 16,697
                                                                                    
        balance, june 30, 2006
                                                                    81,275,000                
        defined benefit pension plans - amortization of net income, prior service cost and transition obligation included in net periodic pension cost, net of taxes of 1,400
                                                                                    
        net unrealized losses on securities arising during the period, net of tax benefits of 8,890
                                                                                    
        balance, march 31, 2006
                                                                     81,060,000               
        revenues
                                                                                    
        electric utility
                                                                      569,838,000 503,967,000 475,056,000 491,339,000 429,730,000 374,775,000 410,077,000 370,605,000 346,613,000 359,250,000 354,529,000   341,386,000 
        bank
                                                                      103,338,000 102,556,000 100,004,000 97,431,000 91,946,000 97,224,000 90,296,000 89,982,000 89,258,000 93,770,000 92,703,000   108,034,000 
        expenses
                                                                                    
        operating income
                                                                                  131,860,000  
        interest expense—other than bank
                                                                      -18,275,000 -19,134,000 -19,117,000 -18,990,000 -19,130,000  -18,376,000 -19,106,000   -17,879,000   -19,937,000 
        allowance for borrowed funds used during construction
                                                                      838,000 719,000 702,000 558,000 475,000 427,000 859,000 733,000 644,000 496,000 446,000   524,000 
        preferred stock dividends of subsidiaries
                                                                      -471,000 -473,000 -473,000 -471,000 -474,000 -476,000 -475,000 -475,000 -475,000 -501,000 -501,000   -501,000 
        allowance for equity funds used during construction
                                                                      1,838,000 1,588,000 1,548,000 1,406,000 1,182,000 1,087,000 1,934,000 1,673,000 1,449,000 1,098,000 989,000   998,000 
        income from continuing operations before income taxes
                                                                      50,286,000 43,429,000  59,742,000   65,628,000  48,008,000 48,005,000     
        income taxes
                                                                      17,963,000 16,205,000 19,474,000 22,252,000 15,167,000 14,779,000 24,869,000 38,533,000 17,076,000 17,483,000 14,739,000   17,461,000 
        income from continuing operations
                                                                      32,323,000 27,224,000  37,490,000 28,335,000  40,759,000 11,238,000  30,522,000 25,760,000  118,217,000 28,666,000 
        discontinued operations-loss on disposal, net of income taxes
                                                                          -755,000          
        basic earnings per common share
                                                                        400   300   810      
        continuing operations
                                                                      400 340  460 350  510 140  810 690   850 
        discontinued operations
                                                                          -10  20    -100   -640 
        diluted earnings per common share
                                                                        400   300   800      
        dividends per common share
                                                                      310 310 310 310 310 310 310 310 620 620 620   620 
        weighted-average number of common shares outstanding
                                                                      81,213,000 81,100,000 80,981,000 80,903,000 80,814,000 80,701,000 80,509,000 80,350,000 38,369,000 37,516,000 37,195,000   33,716,000 
        dilutive effect of stock options and dividend equivalents
                                                                      343,000 332,000  451,000 399,000  319,000 357,000 209,000 160,000 182,000   209,000 
        adjusted weighted-average shares
                                                                      81,556,000 81,432,000 81,363,000 81,354,000 81,213,000 81,135,000 80,828,000 80,707,000 38,578,000 37,676,000 37,377,000   33,925,000 
        ratio of earnings to fixed charges
                                                                                    
        excluding interest on asb deposits
                                                                        2,330   2,000   2,220      
        including interest on asb deposits
                                                                        1,950   1,760   1,930      
        income before income taxes
                                                                        51,811,000  43,502,000 38,874,000  49,771,000   40,499,000   46,127,000 
        dilutive effect of stock-based compensation
                                                                        382,000            
        available-for-sale mortgage-related securities pledged for repurchase agreements
                                                                         813,136,000 821,274,000 885,650,000 916,592,000 1,000,681,000 981,631,000 937,337,000 960,085,000 989,745,000  755,764,000 
        investment in federal home loan bank of seattle stock
                                                                         97,764,000           
        securities sold under agreements to repurchase
                                                                         681,427,000 667,463,000 753,180,000 790,699,000 870,098,000 851,331,000 787,585,000 836,648,000 845,959,000  617,542,000 
        advances from federal home loan bank
                                                                         1,008,200,000 1,018,200,000 998,200,000 1,020,053,000 965,052,000 935,052,000 1,037,052,000 1,039,552,000 1,057,252,000  1,183,752,000 
        discontinued operations-gain on disposal, net of income taxes
                                                                            1,913,000        
        held-to-maturity investment in federal home loan bank of seattle stock
                                                                          97,764,000          
        accumulated other comprehensive loss
                                                                          -11,759,000 -36,804,000         
        basic earnings per common share operations
                                                                                    
        held-to-maturity investment securities
                                                                           97,764,000 97,365,000 96,516,000 95,566,000 93,447,000 92,227,000 91,035,000  88,047,000 
        three months ended march 31
                                                                           2,005,000   2,004,000   2,003,000   
        interest expense–other than bank
                                                                           -18,835,000   -21,447,000 -17,315,000     
        dilutive effect of stock options and other
                                                                           434,000         
        hei- and heco-obligated preferred securities of trust subsidiaries
                                                                               200,000,000     
        accumulated other comprehensive income
                                                                            -4,677,000 -25,792,000 20,407,000 6,861,000 20,698,000 25,854,000 30,679,000  
        preferred securities distributions of trust subsidiaries
                                                                               -4,008,000 -4,009,000   -4,008,000 
        discontinued operations-income from operations, net of income tax benefits
                                                                                    
        preferred stock of subsidiaries–not subject to mandatory redemption
                                                                               34,406,000     
        preferred stock, no par value, authorized 10,000 shares; issued: none
                                                                                    
        discontinued operations-income from operations net of income tax benefits
                                                                                    
        hei- and heco-obligated preferred securities of trust subsidiaries directly or indirectly holding solely hei and hei-guaranteed and heco and heco-guaranteed subordinated debentures
                                                                                200,000,000 200,000,000  200,000,000 
        discontinued operations-income from operations, net of income taxes
                                                                                -3,870,000    
        goodwill and other intangibles.
                                                                                 95,514,000   
        electric utility.
                                                                                    
        dividends per common share.
                                                                                    
        advances to and notes receivable from subsidiaries
                                                                                  5,600,000  
        available-for-sale investment securities
                                                                                  7,971,000  
        accounts receivable
                                                                                  1,593,000  
        deferred income tax assets
                                                                                  13,110,000  
        other assets
                                                                                  4,152,000  
        net assets of discontinued operations
                                                                                  787,000  
        investments in subsidiaries, at equity
                                                                                  1,512,423,000  
        notes payable to subsidiaries
                                                                                  10,922,000  
        loan from hei preferred funding, lp
                                                                                  103,000,000  
        net liabilities of discontinued operations
                                                                                    
        note to balance sheets
                                                                                    
        long-term debt consisted of the following:
                                                                                    
        promissory notes, 6.2 - 7.6%, due in various years from 2003 through 2014
                                                                                  301,000,000  
        promissory note, 5.5%, due in 2003
                                                                                  100,000,000  
        revenues 1
                                                                                  -3,881,000  
        equity in income from continuing operations of subsidiaries
                                                                                  152,725,000  
        expenses:
                                                                                    
        operating, administrative and general
                                                                                  15,633,000  
        depreciation of property, plant and equipment
                                                                                  891,000  
        taxes, other than income taxes
                                                                                  460,000  
        interest expense
                                                                                  37,576,000  
        income from continuing operations before income tax benefits
                                                                                  94,284,000  
        income tax benefits
                                                                                  23,933,000  
        income from discontinued subsidiary operations
                                                                                    
        minimum pension liability
                                                                                   33,358,000 
        discontinued operations, net of income taxes
                                                                                    
        income from operations
                                                                                   -711,000 
        net income on disposals
                                                                                   -20,821,000 
        income from discontinued operations
                                                                                   -21,532,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 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 2018-12-31 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-03-31 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 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-09-30 2007-06-30 2007-03-31 2006-09-30 2006-06-30 2006-03-31 2005-09-30 2005-06-30 2005-03-31 2004-09-30 2004-06-30 2004-03-31 2003-09-30 2003-06-30 2003-03-31 2002-09-30 
                                                                              
          cash flows from operating activities
                                                                              
          net income
        30,450,000  26,558,000 27,144,000 -67,772,000 -103,931,000 -1,295,011,000 42,595,000 49,262,000 41,589,000 55,083,000 55,194,000 57,821,000 62,553,000 53,014,000 69,640,000 110,959,000 7,921,000 64,345,000 64,831,000 50,958,000 65,503,000 -7,970,000 40,720,000 -12,398,000 60,544,000 39,134,000 34,666,000 32,825,000 35,491,000 32,339,000 48,286,000 41,894,000 46,400,000 48,707,000 41,061,000 34,152,000 48,177,000 39,273,000 38,789,000 34,698,000 48,875,000 27,612,000 28,935,000 25,171,000 32,920,000 29,735,000 27,599,000 33,954,000   37,281,000 5,136,000 33,967,000 19,881,000 17,549,000 6,764,000 32,323,000 27,224,000 32,337,000           
          adjustments to reconcile net income to net cash from operating activities
                                                                              
          depreciation of property, plant and equipment
        66,541,000 64,132,000 65,993,000 65,766,000 56,814,000 67,999,000 68,131,000 68,757,000 66,969,000 67,490,000 66,724,000 66,508,000 65,994,000 63,963,000 63,122,000 62,990,000 74,036,000 49,201,000 61,494,000 61,427,000 59,440,000 59,307,000 43,980,000 53,091,000 42,661,000 50,061,000 50,011,000 50,051,000 48,594,000 45,866,000 45,865,000 43,177,000 43,216,000 43,181,000 40,512,000 40,117,000 39,726,000 37,429,000 37,606,000 37,911,000 36,636,000 36,273,000 37,535,000 37,708,000 37,414,000 37,503,000 39,808,000 39,798,000 36,917,000 38,505,000 38,494,000 37,690,000 37,851,000 37,882,000 36,950,000 37,201,000 36,856,000 35,288,000 35,313,000 35,261,000 33,417,000 33,469,000 33,505,000 31,239,000 31,524,000 31,302,000 30,364,000 30,131,000 30,056,000 29,041,000 
          other amortization
        8,906,000 9,824,000 10,112,000 10,796,000 -5,291,000 12,521,000 12,509,000 12,093,000 10,362,000 11,135,000 11,247,000 10,362,000 9,856,000 9,782,000 9,709,000 9,425,000 15,486,000 -838,000 6,945,000 10,951,000 13,084,000 13,525,000 -4,871,000 8,745,000 -6,864,000 9,261,000 3,729,000 2,372,000 1,928,000 2,958,000 1,362,000 1,440,000 2,405,000 1,609,000 -516,000 1,933,000 935,000 1,812,000 1,580,000 1,419,000 4,766,000 2,587,000 9,611,000 2,354,000 1,610,000 846,000 584,000 1,565,000 1,553,000 1,890,000 594,000 -276,000 1,343,000 2,860,000 4,699,000 1,896,000 2,680,000 3,579,000 2,015,000 2,196,000 1,704,000 5,863,000 -2,000 4,489,000 4,803,000 4,843,000 8,488,000 9,397,000 7,798,000 6,451,000 
          loss on sale of a subsidiary
           13,211,000                                                                   
          deferred income tax benefit
        -4,055,000 -9,464,000                                                                     
          share-based compensation expense
        1,202,000 -609,000 2,777,000 754,000 430,000 86,000 1,787,000 1,288,000 2,251,000 2,362,000 3,888,000 2,031,000 3,029,000 1,744,000 3,476,000 2,117,000   2,852,000 2,602,000 361,000 1,390,000  1,657,000  1,098,000 2,229,000 1,056,000 1,013,000                                          
          allowance for equity funds used during construction
        -3,764,000 -3,821,000 -3,702,000 -3,585,000 -3,510,000 -3,300,000 -3,336,000 -3,640,000 -4,091,000 -4,000,000 -3,772,000 -3,301,000 -3,143,000 -2,552,000 -2,470,000 -2,409,000 -2,539,000 -2,427,000 -2,377,000 -2,191,000 -2,212,000 -2,347,000  -3,294,000 -3,575,000 -3,482,000 -3,027,000 -2,399,000 -1,739,000 -1,896,000 -1,413,000 -1,937,000 -1,387,000 -1,609,000               -2,628,000 -4,120,000 -3,605,000 -2,426,000 -2,105,000 -1,901,000 -1,336,000 -1,202,000 -1,232,000 -1,838,000 -1,588,000 -1,548,000 -1,406,000 -1,182,000 -1,087,000 -1,934,000 -1,673,000 -1,449,000 -1,098,000 -989,000 -988,000 -1,162,000 
          other
        -3,491,000 -1,735,000 16,000 -2,809,000 -6,130,000 -9,197,000 -554,000 2,091,000 973,000 -1,605,000 -2,722,000 -988,000 -2,188,000 -1,534,000 -1,306,000 -2,552,000 -8,051,000 6,028,000 -1,518,000 -3,519,000 6,139,000 -919,000 14,606,000 2,150,000 284,000 -1,596,000 593,000 -347,000 819,000 27,000 3,281,000 -23,000 -5,864,000 5,848,000 671,000 1,495,000 869,000       145,000 3,477,000    340,000 86,000 -26,000 807,000 -57,000 5,263,000 457,000 1,000 607,000 259,000 1,177,000 53,000 -104,000 1,248,000 10,067,000 2,083,000 -2,261,000 1,025,000 -1,950,000 202,000 6,087,000 
          changes in assets and liabilities
                                                                              
          decrease in accounts receivable and unbilled revenues
        36,366,000 -67,906,000 13,514,000 378,000  -50,984,000 -38,613,000 138,369,000  -62,201,000 21,272,000 82,423,000    4,454,000      -12,206,000       28,108,000  58,331,000   22,352,000   14,335,000           7,231,000 -39,828,000 -13,435,000 101,743,000   -3,857,000   27,745,000   20,702,000  -30,483,000 26,588,000   17,575,000     
          increase in fuel oil stock
        -10,958,000   -15,352,000          -7,523,000 -84,557,000 -35,333,000        -1,704,000          -34,260,000                  -10,439,000 -59,985,000 -9,269,000 -11,756,000                
          increase in materials and supplies
        -2,161,000   -8,943,000    -1,329,000                                                               
          decrease in regulatory assets
        1,012,000   5,985,000      24,528,000 -1,722,000 -8,898,000         -9,005,000 580,000      5,909,000                                           
          increase in regulatory liabilities
        -539,000 23,241,000 14,814,000 27,619,000 14,972,000 16,745,000 13,807,000 2,909,000 22,016,000 9,672,000 11,231,000 11,551,000 15,594,000 18,006,000 5,768,000 5,520,000 6,552,000 2,982,000 10,540,000 -4,716,000 -807,000 -17,472,000                                                 
          increase in accounts, interest and dividends payable
        35,362,000 -9,982,000 -8,390,000 21,744,000 -39,427,000 26,432,000 11,395,000 8,462,000 -10,837,000 35,904,000 10,198,000 24,748,000 -10,840,000 -23,106,000 -9,375,000 71,490,000   -4,994,000 7,677,000 726,000 27,542,000  22,808,000  -65,841,000 -16,395,000 71,846,000 30,135,000     -9,307,000   38,148,000                                  
          change in prepaid and accrued income taxes, tax credits and utility revenue taxes
        -45,457,000 23,177,000 15,098,000 -54,036,000 9,496,000 9,449,000 -32,842,000 -11,628,000 11,613,000 20,311,000 2,134,000 -47,305,000 48,357,000 51,106,000 37,101,000 -14,928,000   23,695,000 -25,513,000 -2,860,000 -20,444,000  -29,842,000  40,782,000 4,221,000 -42,175,000                                           
          change in defined benefit pension and other postretirement benefit plans asset/liability
        -2,073,000                                                                      
          change in other assets and liabilities
        -46,310,000 -10,268,000 16,271,000 -37,192,000 23,081,000 -38,767,000 65,463,000 -103,589,000 76,046,000 -33,193,000 5,872,000 -43,033,000 15,795,000 10,849,000 151,000 -55,411,000 -29,082,000 16,000,000 -5,705,000 -34,095,000 -4,646,000 -20,423,000 4,696,000 -31,892,000 4,445,000 11,611,000 -6,780,000 -27,142,000 4,499,000 -66,972,000 19,826,000 -30,806,000 10,337,000 -27,208,000                                     
          net cash from operating activities
        61,031,000 100,252,000 134,751,000 49,665,000 136,570,000 157,464,000 68,828,000 124,619,000 76,333,000 103,521,000 190,665,000 180,952,000 241,489,000 138,345,000 -17,943,000 92,585,000 177,417,000 80,669,000 75,857,000 41,730,000 117,139,000 114,885,000 135,934,000 34,677,000 44,043,000 105,120,000 92,089,000 93,934,000 170,592,000 27,653,000 76,650,000 127,215,000 26,774,000 19,421,000 115,934,000 82,473,000 48,319,000    149,277,000 45,908,000   151,130,000 104,334,000 75,384,000 9,869,000 46,668,000 65,107,000 115,204,000 57,667,000 -9,516,000 25,968,000 90,563,000 28,514,000 50,901,000 55,693,000 76,890,000 70,799,000 86,212,000 22,653,000 47,514,000 78,883,000 94,757,000 60,756,000 90,644,000 80,430,000 55,604,000 105,789,000 
          cash flows from investing activities
                                                                              
          proceeds from sale of subsidiaries
         8,000,000 5,781,000                                                                   
          capital expenditures
        -103,535,000 -93,957,000 -74,955,000 -86,538,000 -85,606,000 -78,780,000 -80,315,000 -99,550,000 -105,932,000 -106,489,000 -111,578,000 -124,297,000 -107,759,000 -88,529,000 -68,586,000 -79,163,000 -110,778,000 -55,332,000 -74,335,000 -74,079,000 -87,723,000 -98,356,000 -133,352,000 -127,194,000 -92,158,000 -84,061,000 -138,185,000 -127,818,000 -83,225,000 -59,011,000 -86,750,000 -83,424,000 -65,829,000      -64,349,000 -94,582,000 -80,510,000 -70,972,000 -53,094,000 -48,882,000 -59,236,000 -44,365,000 -35,521,000 -49,291,000 -52,374,000 -45,317,000 -60,550,000 -47,043,000 -39,103,000 -54,816,000 -46,885,000 -39,758,000 -34,756,000 -34,762,000 -25,460,000 -30,070,000 
          free cash flows
        -42,504,000 6,295,000 59,796,000 -36,873,000 50,964,000 78,684,000 -11,487,000 25,069,000 -29,599,000 -2,968,000 79,087,000 56,655,000 133,730,000 49,816,000 -86,529,000 13,422,000 66,639,000 25,337,000 1,522,000 -32,349,000 29,416,000 16,529,000 135,934,000 -98,675,000 -83,151,000 12,962,000 8,028,000 -44,251,000 42,774,000 -55,572,000 17,639,000 40,465,000 -56,650,000 -46,408,000 115,934,000 82,473,000 48,319,000    149,277,000 45,908,000   151,130,000 104,334,000 75,384,000 9,869,000 -17,681,000 -29,475,000 34,694,000 -13,305,000 -62,610,000 -22,914,000 31,327,000 -15,851,000 15,380,000 6,402,000 24,516,000 25,482,000 25,662,000 -24,390,000 8,411,000 24,067,000 47,872,000 20,998,000 55,888,000 45,668,000 30,144,000 75,719,000 
          net cash from investing activities
        -101,912,000 -84,863,000 -73,997,000 -78,493,000 282,378,000 -57,583,000 39,115,000 -5,592,000 112,239,000 -86,784,000 -145,386,000 -137,468,000 -333,920,000 -297,731,000 -269,317,000 -227,714,000 -982,003,000 573,843,000 -253,412,000 -518,020,000 -269,015,000 -515,377,000  -231,051,000 68,072,000 -40,917,000 -168,018,000 -231,424,000 -215,251,000 -139,909,000 -87,797,000 -104,890,000 -197,870,000 -74,232,000               29,160,000 36,137,000 157,213,000 32,758,000 1,150,976,000 -29,829,000 -14,230,000 -22,501,000 -95,360,000 105,204,000 -66,657,000 -98,963,000 -154,953,000 -53,559,000 1,703,000 -99,102,000 -148,329,000 -60,448,000 -61,830,000 -91,899,000 -123,174,000 -78,174,000 
          cash flows from financing activities
                                                                              
          repayment of long-term debt
        -5,042,000 -63,667,000 -532,741,000 -98,067,000  -2,977,000 -1,620,000 -8,268,000  -1,891,000 -8,548,000 -53,878,000  -1,722,000 -1,584,000 -13,446,000    -50,699,000         -75,000,000                      -50,000,000 -10,000,000 -126,000,000 -100,000,000 -10,000,000 -6,000,000 -47,000,000   -192,000,000 -18,000,000 
          withheld shares for employee taxes on vested share-based compensation
        -128,000 -178,000  -4,000 -1,070,000  -18,000 -2,338,000  -79,000 -14,000 -3,065,000   -5,000 -1,997,000   -991,000  -9,000 -100,000 -3,687,000                                           
          preferred stock dividends of subsidiaries
         -471,000 -473,000 -473,000  -471,000 -473,000 -473,000  -471,000 -473,000 -473,000  -471,000 -473,000 -473,000   -473,000 -473,000  -471,000  -473,000  -471,000 -473,000 -473,000 -473,000 -473,000 -473,000 -471,000 -473,000 -473,000              499,000                       
          net cash from financing activities
        -8,057,000 374,933,000 -535,684,000 -102,206,000  506,569,000 -43,836,000 -310,878,000  346,168,000 -45,441,000 71,139,000  173,506,000 144,702,000 131,283,000  -574,140,000 143,970,000 408,957,000  11,641,000 -159,326,000 179,278,000 -97,605,000 -72,411,000 52,080,000 93,268,000 78,924,000 120,775,000 127,773,000 -18,147,000 90,353,000 103,895,000 68,535,000 -63,735,000 107,278,000 -55,277,000 66,510,000 62,659,000 -5,410,000 -73,689,000 -94,000 95,228,000     -82,720,000 3,328,000 -294,493,000 -46,884,000 -1,190,396,000 1,149,000 -77,611,000 -19,603,000 28,055,000 -195,723,000 -24,669,000 52,873,000 75,448,000 19,256,000 17,034,000 53,800,000 -106,679,000 90,580,000 -2,789,000 -93,937,000 139,633,000  
          net decrease in cash, cash equivalents and restricted cash
        -48,938,000             14,120,000 -142,558,000 -3,846,000                                                       
          cash, cash equivalents and restricted cash, beginning of period
        980,746,000     694,574,000  204,927,000  311,462,000  -295,653,000 358,979,000                                                  
          cash, cash equivalents and restricted cash, end of period
        931,808,000     606,450,000 64,107,000 502,723,000  362,905,000 -162,000 319,550,000  14,120,000 -142,558,000 307,616,000  -215,281,000 -33,585,000 291,646,000  -388,851,000                                                 
          less: restricted cash
        -478,968,000 3,635,000 -123,000 -482,480,000  2,777,000 1,109,000 -17,531,000  -10,060,000 -888,000 -4,216,000  1,488,000 526,000 -5,912,000  4,305,000 3,449,000 -14,067,000  7,495,000                                                 
          cash and cash equivalents, end of period
        452,840,000     609,227,000 65,216,000 485,192,000  352,845,000 -1,050,000 315,334,000  15,608,000 -142,032,000 301,704,000  -210,976,000 -30,136,000 277,579,000  -381,356,000  244,785,000  -8,208,000 -23,849,000 234,230,000 334,743,000 8,519,000 292,168,000 4,178,000 -80,743,000 269,120,000 61,330,000 -108,996,000 262,708,000 -39,037,000 -28,797,000 236,346,000  16,737,000 -49,508,000 316,254,000  109,164,000                         
          net income, including loss from discontinued operations in 2024
                                                                              
          adjustments to reconcile net income to net cash from operating activities - continuing operations
                                                                              
          loss from discontinued operations
                                                                              
          loss on sale of subsidiaries and impairment loss on assets sold and held for sale
                                                                              
          assets impairment
                                                                              
          decrease in fuel oil stock
         3,336,000    36,964,000    -9,376,000 14,534,000 33,429,000                 22,812,000                    -12,557,000 7,355,000 15,028,000                    
          decrease in materials and supplies
         -1,522,000                                                                     
          decrease in defined benefit pension and other postretirement benefit plans liability
         -553,000 -2,211,000 -1,499,000  -1,910,000 -3,854,000 -930,000 -2,150,000 -2,418,000 -2,354,000 -1,950,000 -963,000 -1,530,000 -1,389,000 -1,309,000 -2,758,000   -2,621,000            -880,000 -896,000 -818,000                                     
          increase in wildfire-related claims
                                                                              
          net cash from operating activities-continuing operations
         100,252,000 134,751,000 49,665,000                                                                   
          net cash from operating activities-discontinued operations
                                                                              
          net cash from investing activities-continuing operations
         -84,863,000 -73,997,000 -78,493,000                                                                   
          net cash from investing activities-discontinued operations
                                                                              
          repayment of short-term debt
                        15,000,000 -65,000,000                                                  
          proceeds from issuance of long-term debt
             531,000 4,673,000  375,000,000 100,000,000 150,000,000  60,000,000 7,312,000  -76,487,000 29,687,000 161,800,000  13,204,000  50,000,000   75,000,000     50,000,000 40,000,000   125,000,000     150,018,000 20,000 3,148,000 3,905,000 4,905,000 9,897,000 9,094,000 5,648,000 215,679,000    4,882,000 5,158,000 48,485,000 452,000 51,749,000 50,324,000 271,000 66,146,000 100,943,000 4,485,000 
          net proceeds from issuance of common stock
                                    3,022,000 1,000 104,468,000 23,862,000 -6,000 3,054,000 6,389,000 7,291,000 4,703,000 4,972,000 5,969,000 5,940,000 1,118,000 2,790,000 6,397,000 5,674,000 6,034,000 5,883,000 5,232,000 5,557,000 2,218,000 1,421,000 7,365,000 5,594,000 9,159,000 6,314,000 7,108,000 5,930,000 2,411,000 911,000 2,378,000 103,000 314,000   2,356,000 -255,000 106,255,000 6,890,000 10,866,000 5,259,000 4,973,000 
          net cash from financing activities-continuing operations
         374,933,000                                                                     
          net cash from financing activities-discontinued operations
                                                                              
          net increase in cash, cash equivalents and restricted cash, including cash from discontinued operations
                                                                              
          cash, cash equivalents and restricted cash, including cash from discontinued operations, beginning of period
         1,242,852,000                                                                   
          cash, cash equivalents and restricted cash, including cash from discontinued operations, end of period
         390,322,000 -474,930,000 1,111,818,000                                                                   
          less: cash from discontinued operations
                                                                              
          cash and cash equivalents from continuing operations, end of period
         393,957,000 -475,053,000 629,338,000                                                                   
          loss on sale of a subsidiary and impairment loss on assets held for sale
                                                                              
          increase in regulatory assets
              -6,247,000 -17,178,000        -5,089,000              -9,149,000 -10,827,000 200,000 -8,473,000 -9,258,000                                     
          increase in wildfire tort-related claims
            203,000,000                                                                 
          net decrease in cash, cash equivalents and restricted cash, including cash from discontinued operations
          -474,930,000 -131,034,000                                                                   
          income from discontinued operations
                                                                              
          deferred income tax expense
           -316,000   -457,336,000 1,826,000                                                               
          decrease in wildfire tort-related claims
                                                                              
          adjustments to reconcile net income to net cash from operating activities-continuing operations
                                                                              
          loss (income) from discontinued operations
                                                                              
          loss (gains) on sale of equity-method investment
                                                                              
          asset impairment
                                                                             
          decrease (increase) in accounts receivable and unbilled revenues
                          -47,548,000 5,664,000       -57,000 -12,337,000    -15,957,000   9,176,000     37,562,000                               
          decrease (increase) in fuel oil stock
               -14,025,000           -27,281,000 -16,400,000 2,303,000 316,000 11,998,000    1,482,000 -7,444,000   20,731,000    -19,642,000                                    
          decrease (increase) in regulatory assets
            -9,480,000        322,000 21,322,000     -2,862,000 -14,869,000   15,726,000 -16,900,000  -4,257,000   1,585,000                                          
          acquisition of business
                                                                             
          consolidated statements of cash flows
                                                                              
          benefit from credit losses
             248,000 -1,910,000 -2,159,000     2,729,000 -186,000     -12,207,000 -8,435,000 11,307,000 13,970,000                                                 
          loans originated, held for sale
             -26,171,000 -32,063,000 -25,318,000 -14,584,000 -22,376,000 -9,462,000 -5,450,000 -8,000,000 -11,500,000 -34,764,000 -73,931,000   -76,860,000 -162,901,000 -183,661,000 -103,126,000                                                 
          proceeds from sale of loans, held for sale
             28,130,000 30,809,000 26,450,000 13,076,000 21,490,000 8,934,000 5,662,000 10,147,000 12,058,000 38,670,000 75,629,000   95,635,000 170,862,000 180,405,000 127,979,000  33,114,000                                               
          gain on sale of loans
             -363,000 -363,000 -425,000 -209,000 -341,000 -230,000 -130,000 -62,000 -181,000 -372,000 -1,077,000   -1,925,000 -4,300,000 -7,801,000 -7,681,000                                                 
          goodwill impairment
                                                                             
          decrease (increase) in materials and supplies
             -884,000                                                                 
          principal repayments on available-for-sale investment securities
             27,197,000 26,930,000 25,615,000 31,651,000 48,763,000 35,795,000 32,484,000 56,835,000 76,425,000 104,440,000 104,654,000   135,842,000 184,755,000 147,113,000 149,787,000  51,895,000  55,363,000 51,463,000 48,200,000 48,819,000 35,082,000 28,486,000                                        
          proceeds from repayments or maturities of held-to-maturity investment securities
             23,615,000 15,665,000 13,752,000 14,537,000 17,219,000 17,666,000 17,938,000 18,999,000 2,501,000 3,385,000 4,547,000                                                       
          purchase of stock from federal home loan bank
             -14,265,000 -21,856,000 -15,160,000 -13,640,000 -26,440,000 -35,960,000 -80,768,000 -74,280,000     -10,484,000 -22,296,000 -3,344,000 -1,040,000  -2,853,000  -2,380,000 -488,000 -1,373,000                                          
          redemption of stock from federal home loan bank
             17,550,000 4,095,000 18,432,000 13,640,000 18,440,000 52,520,000 69,208,000 72,480,000     10,484,000 20,976,000 5,584,000  2,400,000  2,000,000   833,000                                          
          net decrease (increase) in loans held for investment
             -8,284,000 76,219,000 42,853,000     -266,307,000 -182,441,000          -75,006,000    890,000                                           
          proceeds from sale of commercial loans
             9,119,000 31,067,000 28,010,000              7,149,000  17,934,000 13,493,000                                           
          purchase of loans held for investment
                -13,183,000 -13,012,000 -25,230,000                                                          
          contributions to low income housing investments
                -942,000   -418,000 -104,000      -3,273,000 -3,205,000 -5,452,000 -2,000,000  -1,425,000                                               
          net decrease in deposit liabilities
             -37,263,000                                           -120,767,000 14,584,000 -26,051,000 -87,822,000   -45,135,000                
          net decrease in short-term borrowings with original maturities of three months or less
                                    -7,578,000                                          
          net decrease in other bank borrowings with original maturities of three months or less
                                                                              
          proceeds from issuance of short-term debt
                 65,000,000                                                          
          proceeds from issuance of other bank borrowings
             320,000,000  450,000,000 550,000,000                                                          
          repayment of other bank borrowings
             -550,000,000                                                              
          common stock dividends
                 -34,064,000 -39,447,000 -39,446,000  -38,315,000 -38,301,000 -38,301,000  -9,464,000 -37,155,000 -37,156,000  -36,029,000  -33,741,000 13,382,000 -33,723,000 -33,713,000 -33,713,000 -27,716,000 -33,311,000 -31,829,000 -31,782,000 -31,457,000 -31,435,000               -22,804,000 -28,362,000 -22,765,000 -20,996,000 -20,821,000 -20,676,000 -20,458,000 -20,314,000 -20,166,000 -25,187,000 -25,170,000 -25,112,000 -25,080,000 -25,067,000 -25,006,000 -24,953,000 -24,903,000 -19,039,000 -18,843,000 -18,702,000 -18,627,000 -18,421,000 
          net increase in cash, cash equivalents and restricted cash
             606,450,000 64,107,000 -191,851,000  362,905,000 -162,000 114,623,000       -33,585,000 -67,333,000  -388,851,000                                                 
          net increase in deposit liabilities
               -140,714,000  61,116,000 -165,676,000 60,905,000  5,349,000 -35,736,000 117,060,000   128,136,000 358,337,000  8,185,000  86,095,000  27,940,000 49,296,000 126,161,000 114,678,000 51,943,000 127,913,000 8,937,000 46,873,000 105,510,000 34,600,000 -36,378,000 82,704,000 -9,953,000 11,537,000 55,172,000 7,231,000 7,852,000 19,694,000 59,883,000          -16,904,000   1,525,000 -6,731,000 -63,544,000 52,980,000 98,515,000 86,444,000 70,706,000 104,181,000 55,861,000 -3,883,000 65,820,000 71,641,000 14,429,000 12,439,000 
          net increase in other bank borrowings with original maturities of three months or less
               73,000,000  -32,380,000 -564,430,000  167,430,000 104,225,000 49,080,000   26,980,000 13,015,000  26,900,000                                                 
          loss (gains) on sale of investment securities, net and equity-method investment
                                                                              
          increase in accounts receivable and unbilled revenues
                     -57,978,000          -7,829,000                            -47,470,000                   
          available-for-sale investment securities purchased
                    -75,009,000 -291,168,000   -319,297,000 -781,992,000 -375,720,000 -509,292,000  -88,403,000  -73,957,000 -123,632,000 -171,878,000 -122,387,000 -144,740,000 -63,370,000                                        
          proceeds from sale of available-for-sale investment securities
                          197,354,000          79,564,000                                     
          purchases of held-to-maturity investment securities
                          -98,910,000 -88,262,000 -118,136,000                                                  
          proceeds from sale of residential loans
                                                                              
          proceeds from sale of real estate held for sale
                                                                              
          provision for credit losses
                 8,835,000 43,000 1,175,000    -3,263,000                                                       
          gain on sales of investment securities, net and equity-method investment
                     -8,123,000                                                       
          deferred income taxes
                 -4,285,000 -233,000 -1,076,000 -10,871,000 -6,948,000 -9,428,000 -5,255,000 6,935,000 -4,978,000 -5,159,000 -2,196,000 12,758,000 7,101,000  -2,889,000 16,640,000 4,350,000 6,951,000 10,096,000                       -2,530,000 12,771,000 5,289,000 -5,874,000 -5,948,000 -6,212,000 -5,908,000 -1,463,000 -4,659,000 -2,839,000 17,777,000 3,659,000 -1,593,000 17,945,000 -4,557,000 1,764,000 56,000 -1,882,000 -2,783,000 35,880,000 
          net increase in loans held for investment
                 -75,084,000          23,922,000 144,996,000 -45,951,000       -28,137,000 -10,682,000 -12,524,000 -47,644,000 -99,235,000 -37,887,000                  -26,469,000 23,042,000 -52,401,000 -125,984,000 -72,862,000 -41,232,000 -37,699,000 -101,018,000 -58,078,000           
          net increase in short-term borrowings with original maturities of three months or less
                 -46,212,000 -2,772,000 -88,666,000  47,108,000 52,526,000 17,493,000   -4,494,000 35,751,000  6,501,000  120,485,000  -25,291,000 47,489,000 2,300,000  94,043,000 -88,472,000 -34,599,000 48,806,000 30,887,000 5,555,000 -8,151,000 50,244,000 -14,021,000 -60,048,000 87,467,000 17,626,000      -5,226,000 18,249,000    8,614,000 22,671,000 107,501,000 -24,368,000 15,059,000 -65,866,000             -20,610,000 
          net decrease in loans held for investment
                   -68,871,000    28,076,000                              110,225,000 22,945,000 38,072,000 91,325,000 141,660,000 163,721,000                    
          gain on sale of investment securities
                          -528,000                                                 
          proceeds from sale of low income housing investments
                                                                              
          gain on sale of real estate, held for sale
                                                                              
          state refundable credit
                                                                              
          bad debt expense
                                                                              
          decrease in accounts receivable
                                                                              
          decrease in accrued unbilled revenues
                                                                              
          increase in accounts payable
                                                       2,155,000 20,107,000 4,125,000 -24,873,000 8,586,000 34,207,000 11,667,000 47,796,000 -613,000 7,049,000 -10,109,000 4,389,000 516,000 36,448,000 -22,065,000 14,144,000 20,502,000 9,488,000 10,828,000 -16,343,000 31,198,000 8,149,000 30,808,000 
          change in prepaid and accrued income taxes, tax credits and revenue taxes
                                                                              
          preferred stock dividends of hawaiian electric and subsidiaries
                                                                              
          net decrease in short-term borrowings from non-affiliates and affiliates with original maturities of three months or less
                                                                              
          net increase in cash and cash equivalents
                                   -44,222,000 34,265,000 8,519,000 116,626,000   49,084,000   43,046,000                                  
          increase in defined benefit pension and other postretirement benefit plans liability
                              11,229,000 -390,000 -66,000 250,000 -592,000 1,012,000 137,000 95,000 123,000                                        
          proceeds from sale of low-income housing investments
                                                                             
          repayment of long-term debt and funds transferred for repayment of long-term debt
                             -1,046,000                                                 
          principal repayments of held-to-maturity investment securities
                           20,185,000  19,647,000                                                 
          provision for loan losses
                                                   4,550,000  5,961,000   5,200,000 13,500,000 8,300,000 1,979,000 1,155,000 900,000        -3,100,000   -1,600,000 600,000 1,025,000 1,150,000 1,500,000 
          repayment of long-term debt and funds transferred for redemption of special purpose revenue bonds
                                                                             
          cash and cash equivalents, beginning of period
                               261,881,000  278,452,000 300,478,000 175,542,000 220,036,000 219,662,000 270,265,000  330,651,000                          
          decrease (increase) in accounts receivable
                                                                              
          increase in accrued unbilled revenues
                                                                              
          contributions in aid of construction
                              6,238,000 4,330,000 24,130,000 23,032,000 6,921,000 10,650,000 13,761,000 9,944,000 9,145,000 8,531,000 6,251,000 6,958,000 6,445,000 5,478,000 11,710,000 6,125,000 4,126,000 22,855,000 8,428,000 6,953,000 2,404,000 5,749,000 5,780,000 7,345,000 5,701,000 3,729,000 2,555,000 2,555,000 2,362,000 5,003,000 3,427,000 3,836,000 5,536,000 5,081,000 2,495,000 2,605,000 3,999,000 6,623,000 4,830,000 3,573,000 1,871,000 2,409,000 2,096,000 1,352,000 2,391,000 3,063,000 4,842,000  
          proceeds from issuance of common stock
                                                                              
          net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less
                                                                              
          proceeds from other borrowings
                                                                  429,350,000 206,490,000           
          cash and cash equivalents, january 1
                                                                              
          cash and cash equivalents, december 31
                                                                              
          benefit from loan losses
                               3,541,000  490,000 2,834,000 3,907,000 4,766,000 1,825,000 614,000 1,550,000 1,021,000 995,000 54,000 -959,000 1,858,000 3,580,000 2,378,000 3,546,000 4,082,000 3,822,000      5,359,000       2,700,000                
          loans originated and purchased, held for sale
                               -36,409,000                                               
          proceeds from sale of real estate acquired in settlement of loans
                               589,000  226,000 185,000 232,000 652,000 606,000 768,000 733,000 1,429,000 3,065,000 2,666,000 3,046,000 3,623,000 2,665,000 3,371,000 2,722,000 1,321,000 2,724,000 1,253,000 2,562,000 1,287,000                  169,000 120,000 460,000 2,373,000 678,000 1,022,000  
          net increase in retail repurchase agreements
                               11,946,000  15,421,000 -12,023,000 21,071,000 19,041,000 -7,943,000 21,451,000   141,000       10,296,000 -1,189,000 -5,565,000 7,368,000       -2,366,000 -2,910,000 -34,812,000 14,432,000 15,615,000 11,829,000 23,370,000 23,927,000 13,786,000 7,864,000 9,004,000 3,285,000 5,428,000 13,783,000 6,560,000 85,000 1,785,000 5,045,000 3,880,000 4,845,000 
          proceeds from other bank borrowings
                               60,000,000    20,835,000      95,000,000              310,000,000 1,210,501,000 356,084,000 152,500,000 353,635,000 311,909,000 238,988,000              
          repayments of other bank borrowings
                               -60,000,000  -50,000,000 -59,500,000 -13,534,000 -39,369,000                    -27,000,000 -25,000,000 -552,517,000 -1,158,000,000 -1,473,519,000 -188,600,000 -354,950,000 -197,572,000 -238,813,000              
          net decrease in cash and cash equivalents
                               -17,096,000  -8,208,000      4,178,000                                       
          principal repayment of held-to-maturity investment securities
                               1,032,000                                               
          impairment of utility assets
                                                                              
          decrease (increase) in accrued unbilled revenues
                                                                              
          funds transferred for redemption of special purpose revenue bonds
                                                                              
          loans receivable originated and purchased, held for sale
                                 -36,221,000 -33,870,000 -35,725,000 -42,719,000 -89,851,000 -79,070,000 -32,867,000 -22,658,000 -46,998,000               -77,380,000 -120,110,000 -171,390,000 -44,736,000 -47,927,000 -66,664,000 -12,525,000                
          proceeds from sale of loans receivable, held for sale
                                 39,787,000 39,356,000 40,588,000 40,363,000 94,935,000 78,332,000 31,878,000 26,320,000 48,720,000 74,978,000 45,989,000 102,254,000 141,131,000 76,461,000 85,252,000 146,769,000 55,334,000 28,781,000 43,048,000 85,819,000 139,004,000 84,769,000 82,814,000 77,521,000 130,325,000 192,367,000 32,767,000 57,303,000 67,223,000 4,465,000                
          proceeds from sale of real estate held-for-sale
                                                                              
          income tax credits
                                                                              
          change in cash overdraft
                                       -1,038,000                                     
          decrease in accounts payable
                                                                              
          increase in deferred income taxes
                                    13,008,000 7,715,000 15,265,000 20,648,000 21,954,000 6,298,000                                     
          excess tax benefits from share-based payment arrangements
                                    -380,000 -16,000 -968,000 -4,000 -103,000 -164,000                 -21,000 41,000 -585,000 -28,000 -87,000 -26,000 -233,000 -130,000 -251,000 -316,000           
          change in prepaid and accrued income taxes and utility revenue taxes
                                    -14,343,000 57,007,000 -61,397,000 30,466,000 -13,036,000 -19,474,000                                     
          decrease in accounts, interest and dividends payable
                                     -13,613,000 -42,463,000 -10,969,000                                       
          redemption of stock from federal home loan bank of seattle
                                      5,590,000 5,799,000                                       
          gain on sale of credit card portfolio
                                                                              
          available-for-sale investment and mortgage-related securities purchased
                                       -5,047,000 -45,619,000 -79,912,000               -57,330,000 -80,731,000 -109,364,000 -34,849,000 -310,664,000 -66,145,000 -24,781,000 -67,120,000 -132,195,000 -50,000,000 -125,000,000           
          principal repayments on available-for-sale investment and mortgage-related securities
                                       19,476,000 17,605,000 15,597,000 21,668,000 26,315,000 36,504,000 28,903,000 29,052,000 46,355,000 105,975,000 122,405,000 46,997,000 114,529,000 114,764,000 146,890,000 155,445,000 48,338,000 56,619,000 67,191,000 180,918,000 160,071,000 196,784,000 132,885,000 184,868,000                
          proceeds from sale of credit card portfolio
                                                                              
          net decrease in retail repurchase agreements
                                       -4,253,000                 6,019,000                      
          change in deferred income taxes
                                          20,177,000 20,436,000 19,967,000 41,041,000 20,281,000 21,260,000                               
          decrease in prepaid and accrued income taxes and utility revenue taxes
                                                                              
          contributions to defined benefit pension and other postretirement benefit plans
                                                                              
          other increase in defined benefit pension and other postretirement benefit plans liability
                                          20,579,000                                    
          proceeds from sale of available-for-sale investment and mortgage-related securities
                                                       1,290,674,000 935,000                 
          change in excess tax benefits from share-based payment arrangements
                                           31,000 414,000 25,000 -4,000 44,000                               
          decrease (increase) in accounts, interest and dividends payable
                                                                              
          impairment of utility plant
                                                                              
          net incomees on sale of investment and mortgage-related securities
                                                                              
          other-than-temporary impairment on available-for-sale mortgage-related securities
                                                                              
          changes in deferred income taxes
                                                18,487,000 21,906,000 22,364,000 16,687,000 21,970,000    -1,015,000                      
          changes in excess tax benefits from share-based payment arrangements
                                                -4,000 -16,000 33,000 22,000 -11,000 -41,000 54,000 43,000 6,000                      
          changes in prepaid and accrued income taxes and utility revenue taxes
                                                32,735,000 32,085,000       5,883,000 -8,144,000 -48,253,000                    
          changes in other assets and liabilities
                                                        -10,928,000 -13,588,000 -11,045,000 -6,951,000 -7,277,000 950,000 5,640,000 -2,992,000 307,000 21,429,000 -2,724,000 -9,293,000 -31,358,000 18,107,000 -22,680,000 -18,815,000 7,318,000 -22,305,000 7,217,000 -21,137,000 -13,812,000 -10,215,000 
          decrease in cash overdraft
                                                        -8,885,000 4,903,000 -5,865,000 -8,582,000 -2,978,000 2,182,000 -11,280,000              
          increase (decrease) in cash overdraft
                                                                              
          increase (decrease) in accounts, interest and dividends payable
                                                                              
          gain on pension curtailment
                                                                              
          proceeds from sale of other investments
                                                                              
          increase in cash overdraft
                                                       681,000                       
          net gain on sale of investment and mortgage-related securities
                                                                              
          other-than-temporary impairment of available-for-sale mortgage-related securities
                                                        9,863,000                      
          proceed from sale of real estate acquired in settlement of loans
                                                       1,279,000                       
          net decrease in cash and equivalents and federal funds sold
                                                          -22,076,000 43,541,000 -48,936,000 -2,712,000                 
          cash and equivalents and federal funds sold, beginning of period
                                                       503,922,000 183,435,000 209,855,000 257,301,000 208,947,000 173,629,000 22,000 279,966,000     
          cash and equivalents and federal funds sold, end of period
                                                       342,032,000 -6,892,000 104,572,000 161,359,000 43,541,000 -48,936,000 207,143,000 -1,278,000 -13,590,000 240,897,000 -34,482,000 -14,548,000 240,614,000 6,081,000 -13,064,000 239,458,000 35,004,000 -160,604,000 373,172,000     
          three months ended march 31, 2010
                                                                              
          revenues from external customers
                                                       548,075,000                       
          intersegment revenues
                                                       36,000                       
          revenues
                                                       548,111,000                       
          profit*
                                                       29,512,000                       
          income taxes
                                                       10,961,000                       
          net income for common stock
                                                       18,052,000   20,395,000                    
          assets
                                                       3,957,323,000                       
          three months ended march 31, 2009
                                                                              
          net loss on sale of investment and mortgage-related securities
                                                                            
          preferred stock dividends of noncontrolling interest
                                                        -471,000                      
          net increase in cash and equivalents and federal funds sold
                                                        -6,892,000       -13,590,000 -16,404,000 -34,482,000 -14,548,000 31,667,000 6,081,000 -13,064,000 65,829,000  -160,626,000 93,206,000     
          writedown of utility plant
                                                              11,701,000              
          change in prepaid and accrued taxes
                                                                              
          proceeds from sale of investments
                                                                              
          decrease in taxes accrued
                                                             -41,888,000  27,692,000 -34,828,000   -36,217,000   -22,356,000   -11,134,000     
          net proceeds from sale of investments
                                                              104,000 6,239,000 2,536,000              
          proceeds from short-term borrowings with original maturities of greater than three months
                                                                13,008,000              
          decrease in federal tax deposit
                                                                   30,000,000           
          increase in taxes accrued
                                                                    18,845,000   13,321,000   26,904,000    
          proceeds from sale of available-for-sale mortgage-related securities
                                                                      33,780,000 11,427,000     
          repayment of short-term borrowings with original maturities of greater than three months
                                                                              
          cash flows from discontinued operations-net cash from operating activities
                                                                 344,000 -112,000 6,958,000           
          three months ended september 30, 2007
                                                                              
          nine months ended september 30, 2007
                                                                              
          three months ended september 30, 2006
                                                                              
          nine months ended september 30, 2006
                                                                              
          changes in assets and liabilities, net of effects from the disposal of businesses
                                                                              
          basis of presentation
                                                                              
          principal repayments on available-for-sale mortgage-related securities
                                                                108,556,000 127,851,000 132,477,000 121,632,000 202,215,000 183,845,000 169,580,000 174,872,000 260,987,000 170,497,000 698,066,000 550,992,000 359,990,000 224,782,000 
          reversal of allowance for loan losses
                                                                              
          decrease (increase) in federal tax deposit
                                                                              
          net increase in short-term borrowings with maturities of three months or less
                                                                  69,019,000 40,826,000 -6,246,000 26,781,000 23,496,000  -8,795,000 22,992,000     
          proceeds from short-term borrowings with maturities of greater than three months
                                                                              
          repayments of other borrowings
                                                                  -394,295,000 -214,300,000           
          three months ended june 30, 2006
                                                                              
          income from continuing operations
                                                                    37,490,000 28,335,000 24,095,000 40,759,000 11,238,000 30,932,000 30,522,000 25,760,000 24,327,000 32,777,000 
          six months ended june 30, 2006
                                                                              
          three months ended june 30, 2005
                                                                              
          six months ended june 30, 2005
                                                                              
          adjustments to reconcile income from continuing operations to net cash from operating activities
                                                                              
          gain on sale of income notes
                                                                              
          increase in tax deposit
                                                                             
          available-for-sale mortgage-related securities purchased
                                                                    -237,375,000 -124,430,000 -50,006,000 -229,977,000 -382,304,000 -251,509,000 -789,505,000 -666,163,000 -443,966,000 -213,432,000 
          distributions from unconsolidated subsidiaries
                                                                             
          proceeds from securities sold under agreements to repurchase
                                                                    163,851,000 242,255,000 267,950,000 95,300,000 273,450,000 239,900,000 565,415,000 469,960,000 492,200,000 64,820,000 
          repayments of securities sold under agreements to repurchase
                                                                    -159,650,000 -331,300,000 -332,000,000 -189,650,000 -262,400,000 -220,600,000 -614,365,000 -485,410,000 -313,500,000 -147,087,000 
          proceeds from advances from federal home loan bank
                                                                    88,000,000 85,000,000 79,000,000 40,000,000 10,200,000 192,500,000 56,000,000 70,000,000 131,000,000 
          principal payments on advances from federal home loan bank
                                                                    -10,000,000 -68,000,000 -75,031,000 -23,999,000 -10,000,000 -92,201,000 -195,000,000 -73,700,000 -189,000,000 -45,000,000 
          net cash from discontinued operations
                                                                    -626,000 -1,414,000 -422,000 1,423,000 -375,000 2,318,000 -5,521,000 2,699,000 -107,000 -6,051,000 
          originations and purchases of loans held for investment
                                                                              
          principal repayments on loans held for investment
                                                                     220,988,000 244,705,000        
          originations of loans held for investment
                                                                      -326,592,000        
          loans receivable originated and purchased
                                                                       -257,321,000 -317,801,000 -294,493,000 -447,812,000 -431,188,000 -308,070,000 -283,673,000 
          principal repayments on loans receivable
                                                                       261,082,000 298,656,000 314,810,000 389,118,000 348,842,000 248,135,000 207,214,000 
          preferred securities distributions of trust subsidiaries
                                                                          -4,008,000 -4,009,000 -4,009,000 -4,008,000 
          proceeds from sale of loans
                                                                        10,340,000 29,027,000 37,989,000 14,595,000 2,240,000 
          three months ended june 30, 2004
                                                                              
          six months ended june 30, 2004
                                                                              
          three months ended june 30, 2003
                                                                              
          net income—continuing operations
                                                                              
          six months ended june 30, 2003
                                                                              
          writedowns of income notes
                                                                              
          proceeds from sale of mortgage-related securities
                                                                          79,281,000 138,589,000 25,536,000 8,678,000 
          net decrease in cash and equivalents
                                                                              
          cash and equivalents, beginning of period
                                                                           244,525,000 
          cash and equivalents, end of period
                                                                           -102,707,000 316,481,000 7,594,000 
          net increase in cash and equivalents
                                                                            71,956,000 7,594,000 
          proceeds from sale of investment securities
                                                                              
          repayment of other short-term borrowings
                                                                              
          net cash from financing activities.