Annual report pursuant to Section 13 and 15(d)

Income Tax - Cash Dividends Paid for Federal Income Tax Purposes (Detail)

v2.4.1.9
Income Tax - Cash Dividends Paid for Federal Income Tax Purposes (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Common distributions    
Total 100.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductions 100.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductions
Ordinary Income [Member]    
Common distributions    
Cash dividend paid, Percent 5.40%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= hasi_OrdinaryIncomeMember
63.70%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= hasi_OrdinaryIncomeMember
Return Of Capital [Member]    
Common distributions    
Cash dividend paid, Percent 94.60%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= hasi_ReturnOfCapitalMember
36.30%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= hasi_ReturnOfCapitalMember