XML 83 R98.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Significant group concentrations of credit risk (Details) | 12 Months Ended
--- | ---
Dec. 31, 2013
Risks and Uncertainties [Abstract] |
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required | 80.00%

X
- Definition Represents the minimum benchmark percentage of loan to appraisal ratio which mortgage insurance is required as per the policy of the reporting entity. + References No definition available. + Details
Name: | he_MinimumBenchmarkPercentageofLoantoAppraisalRatiowhichMortgageInsuranceisRequired
Namespace Prefix: | he_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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