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v2.4.1.9

Quarterly information (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 790,040 us-gaap_Revenues | $ 867,096 us-gaap_Revenues | $ 798,657 us-gaap_Revenues | $ 783,749 us-gaap_Revenues | $ 832,503 us-gaap_Revenues | $ 829,168 us-gaap_Revenues | $ 794,567 us-gaap_Revenues | $ 782,232 us-gaap_Revenues | $ 3,239,542 us-gaap_Revenues | $ 3,238,470 us-gaap_Revenues | $ 3,374,995 us-gaap_Revenues
Operating income | 67,241 us-gaap_OperatingIncomeLoss | 91,102 us-gaap_OperatingIncomeLoss | 82,275 us-gaap_OperatingIncomeLoss | 88,306 us-gaap_OperatingIncomeLoss | 78,349 us-gaap_OperatingIncomeLoss | 88,038 us-gaap_OperatingIncomeLoss | 80,207 us-gaap_OperatingIncomeLoss | 68,825 us-gaap_OperatingIncomeLoss | 328,924 us-gaap_OperatingIncomeLoss | 315,419 us-gaap_OperatingIncomeLoss | 284,196 us-gaap_OperatingIncomeLoss
Net income | 33,630 us-gaap_ProfitLoss | 48,286 us-gaap_ProfitLoss | 41,894 us-gaap_ProfitLoss | 46,400 us-gaap_ProfitLoss | 39,486 us-gaap_ProfitLoss | 48,707 us-gaap_ProfitLoss | 41,061 us-gaap_ProfitLoss | 34,152 us-gaap_ProfitLoss | 170,210 us-gaap_ProfitLoss | 163,406 us-gaap_ProfitLoss | 140,548 us-gaap_ProfitLoss
Net income for common stock | 33,157 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 47,815 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 41,421 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 45,927 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 39,013 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 48,236 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 40,588 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 33,679 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 168,320 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 161,516 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 138,658 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Basic earnings per common share (in dollars per share) | $ 0.32 us-gaap_EarningsPerShareBasic | $ 0.47 us-gaap_EarningsPerShareBasic | $ 0.41 us-gaap_EarningsPerShareBasic | $ 0.45 us-gaap_EarningsPerShareBasic | $ 0.39 us-gaap_EarningsPerShareBasic | $ 0.49 us-gaap_EarningsPerShareBasic | $ 0.41 us-gaap_EarningsPerShareBasic | $ 0.34 us-gaap_EarningsPerShareBasic | $ 1.65 us-gaap_EarningsPerShareBasic | $ 1.63 us-gaap_EarningsPerShareBasic | $ 1.43 us-gaap_EarningsPerShareBasic
Diluted earnings per common share (in dollars per share) | $ 0.32 us-gaap_EarningsPerShareDiluted | $ 0.46 us-gaap_EarningsPerShareDiluted | $ 0.41 us-gaap_EarningsPerShareDiluted | $ 0.45 us-gaap_EarningsPerShareDiluted | $ 0.39 us-gaap_EarningsPerShareDiluted | $ 0.48 us-gaap_EarningsPerShareDiluted | $ 0.41 us-gaap_EarningsPerShareDiluted | $ 0.34 us-gaap_EarningsPerShareDiluted | $ 1.64 us-gaap_EarningsPerShareDiluted | $ 1.62 us-gaap_EarningsPerShareDiluted | $ 1.42 us-gaap_EarningsPerShareDiluted
Dividends per common share (in dollars per share) | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.31 us-gaap_CommonStockDividendsPerShareDeclared | $ 1.24 us-gaap_CommonStockDividendsPerShareDeclared | $ 1.24 us-gaap_CommonStockDividendsPerShareDeclared | $ 1.24 us-gaap_CommonStockDividendsPerShareDeclared
Market price per common share |  |  |  |  |  |  |  |  |  |  |
High end of range (in dollars per share) | $ 35.00 he_CommonStockMarketPricePerShareHighEndOfRange | $ 26.89 he_CommonStockMarketPricePerShareHighEndOfRange | $ 25.65 he_CommonStockMarketPricePerShareHighEndOfRange | $ 26.80 he_CommonStockMarketPricePerShareHighEndOfRange | $ 27.15 he_CommonStockMarketPricePerShareHighEndOfRange | $ 27.24 he_CommonStockMarketPricePerShareHighEndOfRange | $ 28.30 he_CommonStockMarketPricePerShareHighEndOfRange | $ 27.92 he_CommonStockMarketPricePerShareHighEndOfRange | $ 35.00 he_CommonStockMarketPricePerShareHighEndOfRange | $ 28.30 he_CommonStockMarketPricePerShareHighEndOfRange |
Low end of range (in dollars per share) | $ 26.04 he_CommonStockMarketPricePerShareLowEndOfRange | $ 22.71 he_CommonStockMarketPricePerShareLowEndOfRange | $ 23.04 he_CommonStockMarketPricePerShareLowEndOfRange | $ 24.39 he_CommonStockMarketPricePerShareLowEndOfRange | $ 24.51 he_CommonStockMarketPricePerShareLowEndOfRange | $ 24.12 he_CommonStockMarketPricePerShareLowEndOfRange | $ 23.84 he_CommonStockMarketPricePerShareLowEndOfRange | $ 25.50 he_CommonStockMarketPricePerShareLowEndOfRange | $ 22.71 he_CommonStockMarketPricePerShareLowEndOfRange | $ 23.84 he_CommonStockMarketPricePerShareLowEndOfRange |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | 725,267 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 803,565 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 738,429 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 720,062 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 770,152 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 764,054 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 728,525 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 717,441 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 2,987,323 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 2,980,172 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 3,109,439 us-gaap_Revenues / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Operating income | 58,878 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 76,156 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 70,068 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 70,666 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 65,564 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 69,853 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 58,975 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 51,121 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 275,768 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 245,513 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 213,012 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Net income | 29,611 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 39,377 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 34,729 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 35,919 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 32,489 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 38,315 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 29,192 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 24,928 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 139,636 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 124,924 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 101,271 us-gaap_ProfitLoss / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Net income for common stock | $ 29,112 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 38,879 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 34,230 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 35,420 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 31,990 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 37,817 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 28,693 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 24,429 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 137,641 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 122,929 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 99,276 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember

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