XML 32 R77.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Recent Accounting Pronouncements (Details) (USD $) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Jan. 01, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses | $ 568,356,000 us-gaap_CostsAndExpenses | $ 694,535,000 us-gaap_CostsAndExpenses |  |  |
Operating income | 69,506,000 us-gaap_OperatingIncomeLoss | 89,214,000 us-gaap_OperatingIncomeLoss |  |  |
Income taxes | 19,979,000 us-gaap_IncomeTaxExpenseBenefit | 25,721,000 us-gaap_IncomeTaxExpenseBenefit |  |  |
Net income for common stock | 31,866,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 45,787,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |  |  |
Other | 481,531,000 us-gaap_OtherAssets |  | 542,523,000 us-gaap_OtherAssets |  |
Liabilities and Equity | 11,273,447,000 us-gaap_LiabilitiesAndStockholdersEquity |  | 11,185,142,000 us-gaap_LiabilitiesAndStockholdersEquity |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  | 633,570,000 he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities |  |
Liabilities | 9,341,245,000 us-gaap_Liabilities |  | 9,360,276,000 us-gaap_Liabilities |  |
Retained earnings | 296,680,000 us-gaap_RetainedEarningsAccumulatedDeficit |  | 296,654,000 us-gaap_RetainedEarningsAccumulatedDeficit | 255,030,000 us-gaap_RetainedEarningsAccumulatedDeficit |
Common stock equity | 1,897,909,000 us-gaap_StockholdersEquity | 1,745,124,000 us-gaap_StockholdersEquity | 1,790,573,000 us-gaap_StockholdersEquity | 1,726,406,000 us-gaap_StockholdersEquity |
American Savings Bank (ASB) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  | 700,000 he_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember
Amortization Method Qualified Affordable Housing Project Investments, Amortization | 1,300,000 he_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |  |  |
Affordable Housing Tax Credit, Amount | 1,400,000 he_AffordableHousingTaxCreditAmount / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |  |  |
Affordable Housing Tax Credit, Other Tax Benefits, Amount | 500,000 he_AffordableHousingTaxCreditOtherTaxBenefitsAmount / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |  |  |
Income taxes | 7,156,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember | 8,133,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |  |
Net income for common stock |  | 14,399,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |  |
Other | 305,917,000 us-gaap_OtherAssets / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  | 305,416,000 us-gaap_OtherAssets / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |
Liabilities and Equity |  |  | 5,566,222,000 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  | 118,363,000 he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |
Liabilities | 5,181,271,000 us-gaap_Liabilities / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  | 5,032,434,000 us-gaap_Liabilities / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |
Retained earnings | 217,909,000 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  | 211,934,000 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |
Common stock equity | 543,606,000 us-gaap_StockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  | 533,788,000 us-gaap_StockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember |  |
Scenario, Previously Reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Income taxes |  | 24,673,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Net income for common stock |  | 45,927,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Other |  |  | 541,542,000 us-gaap_OtherAssets / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Liabilities and Equity |  |  | 11,184,161,000 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  | 631,734,000 he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Liabilities |  |  | 9,358,440,000 us-gaap_Liabilities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Retained earnings |  |  | 297,509,000 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | 255,694,000 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Common stock equity |  |  | 1,791,428,000 us-gaap_StockholdersEquity / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember | 1,727,070,000 us-gaap_StockholdersEquity / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Scenario, Previously Reported | American Savings Bank (ASB) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Income taxes |  | 7,085,000 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Net income for common stock |  | 14,539,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Other |  |  | 304,435,000 us-gaap_OtherAssets / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Liabilities and Equity |  |  | 5,565,241,000 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  | 116,527,000 he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Liabilities |  |  | 5,030,598,000 us-gaap_Liabilities / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Retained earnings |  |  | 212,789,000 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Common stock equity |  |  | 534,643,000 us-gaap_StockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |
Accounting Standards Update 2014-01 | Restatement Adjustment |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Income taxes |  | 1,048,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Net income for common stock |  | (140,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Other |  |  | 981,000 us-gaap_OtherAssets / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Liabilities and Equity |  |  | 981,000 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  | 1,836,000 he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Liabilities |  |  | 1,836,000 us-gaap_Liabilities / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Retained earnings |  |  | (855,000)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember | (664,000)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |
Common stock equity |  |  | (855,000)us-gaap_StockholdersEquity / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember | (664,000)us-gaap_StockholdersEquity / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |
Accounting Standards Update 2014-01 | Restatement Adjustment | American Savings Bank (ASB) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Income taxes |  | 1,048,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Net income for common stock |  | (140,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Other |  |  | 981,000 us-gaap_OtherAssets / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Liabilities and Equity |  |  | 981,000 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Deferred Income Tax Liabilities And Other Liabilities |  |  | 1,836,000 he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Liabilities |  |  | 1,836,000 us-gaap_Liabilities / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Retained earnings |  |  | (855,000)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Common stock equity |  |  | (855,000)us-gaap_StockholdersEquity / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |
Bank |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses | 43,717,000 us-gaap_CostsAndExpenses / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember | 41,088,000 us-gaap_CostsAndExpenses / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |  |
Operating income | 20,631,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember | 22,531,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |  |
Income taxes | 7,156,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember | 8,133,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |  |
Net income for common stock | 13,475,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember | 14,399,000 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |  |
Bank | American Savings Bank (ASB) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses |  | 37,462,000 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |  |
Operating income |  | 22,532,000 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |  |
Liabilities and Equity | 5,724,877,000 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  | 5,566,222,000 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember |  |
Bank | Scenario, Previously Reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses |  | 41,996,000 us-gaap_CostsAndExpenses / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Operating income |  | 21,623,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Bank | Scenario, Previously Reported | American Savings Bank (ASB) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses |  | 38,370,000 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Operating income |  | 21,624,000 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  |  |
Bank | Accounting Standards Update 2014-01 | Restatement Adjustment |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses |  | (908,000)us-gaap_CostsAndExpenses / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Operating income |  | 908,000 us-gaap_OperatingIncomeLoss / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Bank | Accounting Standards Update 2014-01 | Restatement Adjustment | American Savings Bank (ASB) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Total expenses |  | (908,000)us-gaap_CostsAndExpenses / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Operating income |  | $ 908,000 us-gaap_OperatingIncomeLoss / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = he_AccountingStandardsUpdate201401Member / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember / us-gaap_StatementBusinessSegmentsAxis = he_BankingSegmentMember / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |

X
- Definition Affordable Housing Tax Credit, Amount + References No definition available. + Details
Name: | he_AffordableHousingTaxCreditAmount
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Affordable Housing Tax Credit, Other Tax Benefits, Amount + References No definition available. + Details
Name: | he_AffordableHousingTaxCreditOtherTaxBenefitsAmount
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of amortization expense of investment in qualified affordable housing projects. + References No definition available. + Details
Name: | he_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | he_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred Income Tax Liabilities And Other Liabilities + References No definition available. + Details
Name: | he_DeferredIncomeTaxLiabilitiesAndOtherLiabilities
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_CostsAndExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_Liabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.32) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 25 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 32 -Article 5 + Details
Name: | us-gaap_LiabilitiesAndStockholdersEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
Name: | us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 7 + Details
Name: | us-gaap_OtherAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31(a)(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
Name: | us-gaap_StockholdersEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=he_AmericanSavingsBankFSBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=he_AccountingStandardsUpdate201401Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=he_BankingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioPreviouslyReportedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |