XML 85 R66.htm IDEA: XBRL DOCUMENT v2.4.1.9
Share-based compensation (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 01, 2014
Dec. 31, 2014
Dec. 31, 2013
Share-based compensation          
Capitalized share-based compensation expense $ 40,000us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount $ 40,000us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount      
Income tax benefit from compensation expense 600,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense 800,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense      
Equity and Incentive Plan          
Share-based compensation          
Number of additional shares authorized     1,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= he_EquityAndIncentivePlanMember
   
Shares available for future issuance 3,500,000he_ShareBasedCompensationNumberOfSharesThatCouldBeIssuedUponVestingOfRestrictedStockUnitsAndLongTermIncentivePlans
/ us-gaap_PlanNameAxis
= he_EquityAndIncentivePlanMember
       
Number of share issuable upon vesting and achievement of performance goals 800,000he_ShareBasedCompensationNumberOfSharesThatCouldBeIssuedUponVestingAndAchievementOfPerformanceGoals
/ us-gaap_PlanNameAxis
= he_EquityAndIncentivePlanMember
       
Nonemployee Director Stock Plan          
Share-based compensation          
Shares available for future grant 169,290us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= he_NonemployeeDirectorStockPlanMember
       
Long-term Incentive 2012 to 2014 Plan Linked to Total Return to Shareholders          
Share-based compensation          
Award requisite service period 3 years        
Stock appreciation rights (SARs)          
Share-based compensation          
Options outstanding 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
    80,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
 
Weighted average exercise price of options outstanding       $ 26.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
 
Shares underlying SARS exercised 80,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
       
Weighted-average price of shares exercised $ 26.18us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
       
Aggregate intrinsic value of options outstanding 502,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
       
Tax benefit realized for the deduction of exercises 162,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_StockAppreciationRightsSARSMember
       
Restricted stock units          
Share-based compensation          
Unrecognized share based compensation 6,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
       
Weighted average period for recognition of unrecognized compensation cost 2 years 10 months 24 days        
Fair value measurement of vested units and related dividends 3,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
2,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
     
Income tax benefit from compensation expense 1,000,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
700,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
     
Nonvested equity instruments other than options outstanding 261,691us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
332,158us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
  261,235us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
288,151us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
Nonvested equity instruments other than options, weighted average grant date fair value $ 28.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
$ 25.04us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
  $ 25.77us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
$ 25.17us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
Long-term Incentive Plan          
Share-based compensation          
Payment award, low end of range 0.00%he_ShareBasedCompensationByShareBasedPaymentAwardPayoutLowOfRange
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanMember
       
Payment award, high end of range 200.00%he_ShareBasedCompensationByShareBasedPaymentAwardPayoutHighEndOfRange
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanMember
       
LTIP linked to TRS          
Share-based compensation          
Unrecognized share based compensation 1,600,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
       
Weighted average period for recognition of unrecognized compensation cost 1 year 3 months 18 days        
Measurement period for total return to shareholders 3 years        
Nonvested equity instruments other than options outstanding 168,777us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
258,243us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
  257,956us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
232,127us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
Nonvested equity instruments other than options, weighted average grant date fair value $ 27.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
$ 28.46us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
  $ 28.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
$ 32.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanLinkedToTotalReturnToShareholdersMember
Long-term Incentive 2014 to 2016 Plan Linked to Total Return to Shareholders          
Share-based compensation          
Award requisite service period 3 years        
LTIP awards linked to other performance conditions          
Share-based compensation          
Unrecognized share based compensation 2,400,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
       
Weighted average period for recognition of unrecognized compensation cost 1 year 3 months 18 days        
Fair value measurement of vested units and related dividends 4,700,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
1,900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
     
Income tax benefit from compensation expense $ 1,800,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
$ 800,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
     
Nonvested equity instruments other than options outstanding 230,219us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
360,070us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
  364,731us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
296,843us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
Nonvested equity instruments other than options, weighted average grant date fair value $ 26.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
$ 26.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
  $ 26.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
$ 26.14us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ he_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardAwardTypeAxis
= he_LongTermIncentivePlanAwardsLinkedToOtherPerformanceConditionsMember
Long-term Incentive 2013 to 2015 Plan Linked to Total Return to Shareholders          
Share-based compensation          
Award requisite service period 3 years