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Our Portfolio - Our Portfolio - Financing Receivables, Investments, Real Estate and Equity Method Investments - Analysis of Portfolio by Type of Obligor and Credit Quality (Detail) (USD $)
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3 Months Ended |
12 Months Ended |
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Dec. 31, 2012
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Dec. 31, 2014
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Sep. 30, 2012
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| Financing Receivable, Recorded Investment [Line Items] |
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| Financing receivables |
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$ 553,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
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| Financing receivables held-for-sale |
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62,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
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| Investments |
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27,000,000us-gaap_Investments
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| Real estate |
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114,000,000hasi_RealEstateInvestmentsAndIntangibleLeasesAssets
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| Equity method investment |
584,000us-gaap_PaymentsToAcquireInvestments
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144,770,000us-gaap_PaymentsToAcquireInvestments
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3,337,000us-gaap_PaymentsToAcquireInvestments
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| Total |
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900,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
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| Average Remaining Balance |
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11,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
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| Commercial Investment Grade [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| Financing receivables |
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268,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
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| Investments |
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13,000,000us-gaap_Investments
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
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| Real estate |
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114,000,000hasi_RealEstateInvestmentsAndIntangibleLeasesAssets
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
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| Total |
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395,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
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| Average Remaining Balance |
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9,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
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| Commercial Non-Investment Grade [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| Financing receivables |
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1,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
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| Investments |
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14,000,000us-gaap_Investments
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
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| Total |
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15,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
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| Average Remaining Balance |
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14,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
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| Debt and Real Estate Portfolio [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| % of Debt and Real Estate Portfolio |
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98.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
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| Debt and Real Estate Portfolio [Member] | Commercial Investment Grade [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| % of Debt and Real Estate Portfolio |
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52.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
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| Debt and Real Estate Portfolio [Member] | Commercial Non-Investment Grade [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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|
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| % of Debt and Real Estate Portfolio |
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2.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
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| Government [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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|
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| Financing receivables |
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284,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
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| Financing receivables held-for-sale |
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62,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
|
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| Total |
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346,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
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| Average Remaining Balance |
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11,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
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| Government [Member] | Debt and Real Estate Portfolio [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| % of Debt and Real Estate Portfolio |
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46.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
|
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| Subtotal, Debt and Real Estate [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| Financing receivables |
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553,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
|
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| Financing receivables held-for-sale |
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62,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
|
|
| Investments |
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27,000,000us-gaap_Investments
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
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| Real estate |
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114,000,000hasi_RealEstateInvestmentsAndIntangibleLeasesAssets
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
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| Total |
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756,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
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| Average Remaining Balance |
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10,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
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| Subtotal, Debt and Real Estate [Member] | Debt and Real Estate Portfolio [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| % of Debt and Real Estate Portfolio |
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100.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
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| Equity Method Investment [Member] |
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| Financing Receivable, Recorded Investment [Line Items] |
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| Equity method investment |
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144,000,000us-gaap_PaymentsToAcquireInvestments
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_EquityMethodInvestmentsMember
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| Total |
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144,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_EquityMethodInvestmentsMember
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| Average Remaining Balance |
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$ 14,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_EquityMethodInvestmentsMember
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