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Bank subsidiary (Details 13) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 contract | Mar. 31, 2013 contract
Loan modifications determined to be troubled debt restructurings |  |
Commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring | $ 300,000 |
Troubled debt restructurings real estate loans |  |
Loan modifications determined to be troubled debt restructurings |  |
Number of contracts | 15 | 11
Pre-modification outstanding recorded investment | 2,527,000 | 2,508,000
Post-modification outstanding recorded investment | 2,541,000 | 2,146,000
Minimum period of payment default of loans determined to be TDRs |  | 90 days
Residential 1-4 family | Troubled debt restructurings real estate loans |  |
Loan modifications determined to be troubled debt restructurings |  |
Number of contracts | 5 | 4
Pre-modification outstanding recorded investment | 921,000 | 1,122,000
Post-modification outstanding recorded investment | 935,000 | 1,063,000
Home equity line of credit | Troubled debt restructurings real estate loans |  |
Loan modifications determined to be troubled debt restructurings |  |
Number of contracts | 0 | 4
Pre-modification outstanding recorded investment | 0 | 462,000
Post-modification outstanding recorded investment | 0 | 215,000
Residential land | Troubled debt restructurings real estate loans |  |
Loan modifications determined to be troubled debt restructurings |  |
Number of contracts | 7 | 3
Pre-modification outstanding recorded investment | 1,133,000 | 924,000
Post-modification outstanding recorded investment | 1,133,000 | 868,000
Commercial loans | Troubled debt restructurings real estate loans |  |
Loan modifications determined to be troubled debt restructurings |  |
Number of contracts | 3 | 0
Pre-modification outstanding recorded investment | 473,000 | 0
Post-modification outstanding recorded investment | $ 473,000 | $ 0

X
- Definition Represents the commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring. + References No definition available. + Details
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X
- Definition Represents the minimum period of payment default of loans determined to be troubled debt restructurings. + References No definition available. + Details
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- Definition The number of contracts under financing receivables that have been modified by troubled debt restructurings during the period. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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- Definition The amount of the outstanding recorded investment in financial receivables after the financial receivables being modified as troubled debt restructurings. + References No definition available. + Details
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Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of the outstanding recorded investment in financial receivables prior to the financial receivables being modified as troubled debt restructurings. + References No definition available. + Details
Name: | he_FinancingReceivablesModificationsPreModificationRecordedInvestment
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
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- Details
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