XML 46 R81.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Bank segment (HEI only) Key Assumptions Used in Estimating the Fair Value of ASB's Mortgage Servicing Rights (Details) (Mortgage Servicing Rights (MSR), USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Prepayment rate: |  |
25 basis points adverse rate change | $ (757)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof25BasisPointAdverseChangeinPrepaymentSpeed | $ (732)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof25BasisPointAdverseChangeinPrepaymentSpeed
50 basis points adverse change | (1,524)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof50BasisPointAdverseChangeinPrepaymentSpeed | (1,492)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof50BasisPointAdverseChangeinPrepaymentSpeed
Discount rate: |  |
25 basis points adverse rate change | (140)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof25BasisPointsAdverseChangeinDiscountRate | (154)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof25BasisPointsAdverseChangeinDiscountRate
50 basis points adverse change | (278)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof50BasisPointsAdverseChangeinDiscountRate | (306)he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof50BasisPointsAdverseChangeinDiscountRate
American Savings Bank (ASB) |  |
Loans receivable |  |
Unpaid principal balance | $ 1,391,030 he_FairValueInputsUnpaidPrincipalBalanceAsset / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember | $ 1,357,003 he_FairValueInputsUnpaidPrincipalBalanceAsset / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember
Weighted average note rate | 4.07%he_FairValueInputsStatedInterestRate / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember | 4.07%he_FairValueInputsStatedInterestRate / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember
Weighted average discount rate | 9.60%us-gaap_FairValueInputsDiscountRate / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember | 9.80%us-gaap_FairValueInputsDiscountRate / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember
Weighted average prepayment speed | 9.50%us-gaap_FairValueInputsPrepaymentRate / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember | 8.60%us-gaap_FairValueInputsPrepaymentRate / us-gaap_FinancialInstrumentAxis = us-gaap_ServicingContractsMember / dei_LegalEntityAxis = he_AmericanSavingsBankFSBMember

X
- Definition Fair Value Inputs, Stated Interest Rate + References No definition available. + Details
Name: | he_FairValueInputsStatedInterestRate
Namespace Prefix: | he_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair Value Inputs, Unpaid Principal Balance, Asset + References No definition available. + Details
Name: | he_FairValueInputsUnpaidPrincipalBalanceAsset
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | he_SensitivityAnalysisofFairValueDiscountRateAbstract
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | he_SensitivityAnalysisofFairValuePrepaymentRateAbstract
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The hypothetical financial impact of a 25 basis point adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date. + References No definition available. + Details
Name: | he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof25BasisPointAdverseChangeinPrepaymentSpeed
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 25 Basis Points Adverse Change in Discount Rate + References No definition available. + Details
Name: | he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof25BasisPointsAdverseChangeinDiscountRate
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 50 Basis Point Adverse Change in Prepayment Speed + References No definition available. + Details
Name: | he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof50BasisPointAdverseChangeinPrepaymentSpeed
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 50 Basis Points Adverse Change in Discount Rate + References No definition available. + Details
Name: | he_SensitivityAnalysisofFairValueTransferorsInterestsinTransferredFinancialAssetsImpactof50BasisPointsAdverseChangeinDiscountRate
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueInputsDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueInputsPrepaymentRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration