Annual report pursuant to Section 13 and 15(d)

Our Portfolio - Our Portfolio - Financing Receivables, Investments, Real Estate and Equity Method Investments - Analysis of Portfolio by Type of Obligor and Credit Quality (Detail)

v2.4.1.9
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 $)
3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2014
Sep. 30, 2012
Financing Receivable, Recorded Investment [Line Items]      
Financing receivables   $ 553,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount  
Financing receivables held-for-sale   62,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet  
Investments   27,000,000us-gaap_Investments  
Real estate   114,000,000hasi_RealEstateInvestmentsAndIntangibleLeasesAssets  
Equity method investment 584,000us-gaap_PaymentsToAcquireInvestments 144,770,000us-gaap_PaymentsToAcquireInvestments 3,337,000us-gaap_PaymentsToAcquireInvestments
Total   900,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount  
Average Remaining Balance   11,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance  
Commercial Investment Grade [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivables   268,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
 
Investments   13,000,000us-gaap_Investments
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
 
Real estate   114,000,000hasi_RealEstateInvestmentsAndIntangibleLeasesAssets
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
 
Total   395,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
 
Average Remaining Balance   9,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
 
Commercial Non-Investment Grade [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivables   1,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
 
Investments   14,000,000us-gaap_Investments
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
 
Total   15,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
 
Average Remaining Balance   14,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
 
Debt and Real Estate Portfolio [Member]      
Financing Receivable, Recorded Investment [Line Items]      
% of Debt and Real Estate Portfolio   98.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
 
Debt and Real Estate Portfolio [Member] | Commercial Investment Grade [Member]      
Financing Receivable, Recorded Investment [Line Items]      
% of Debt and Real Estate Portfolio   52.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingInvestmentGradeMember
 
Debt and Real Estate Portfolio [Member] | Commercial Non-Investment Grade [Member]      
Financing Receivable, Recorded Investment [Line Items]      
% of Debt and Real Estate Portfolio   2.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
 
Government [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivables   284,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
 
Financing receivables held-for-sale   62,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
 
Total   346,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
 
Average Remaining Balance   11,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
 
Government [Member] | Debt and Real Estate Portfolio [Member]      
Financing Receivable, Recorded Investment [Line Items]      
% of Debt and Real Estate Portfolio   46.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_USTreasuryAndGovernmentMember
 
Subtotal, Debt and Real Estate [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivables   553,000,000us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Financing receivables held-for-sale   62,000,000us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Investments   27,000,000us-gaap_Investments
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Real estate   114,000,000hasi_RealEstateInvestmentsAndIntangibleLeasesAssets
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Total   756,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Average Remaining Balance   10,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Subtotal, Debt and Real Estate [Member] | Debt and Real Estate Portfolio [Member]      
Financing Receivable, Recorded Investment [Line Items]      
% of Debt and Real Estate Portfolio   100.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= hasi_PortfolioMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= hasi_SubtotalDebtAndRealEstateMember
 
Equity Method Investment [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Equity method investment   144,000,000us-gaap_PaymentsToAcquireInvestments
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_EquityMethodInvestmentsMember
 
Total   144,000,000us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_EquityMethodInvestmentsMember
 
Average Remaining Balance   $ 14,000,000hasi_FinanceReceivableOutstandingAverageRemainingBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_EquityMethodInvestmentsMember