Annual report pursuant to Section 13 and 15(d)

Non-Controlling Interest - Additional Information (Detail)

v2.4.1.9
Non-Controlling Interest - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 0 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Noncontrolling Interest [Abstract]      
Operating Partnership units outstanding   27,673,213hasi_OperatingPartnershipUnitsOutstanding  
Percentage of Operating Partnership owned   98.80%hasi_PercentageOfOperatingPartnershipOwnedByCompanyAndSubsidiaries  
Percentage of Operating Partnership owned by other limited partners   1.20%hasi_OperatingPartnershipUnitsNotOwnedByCompany  
Redemption of Operating Partnership units outstanding   131,093hasi_RedeemableOperatingPartnershipUnitOutstanding 0hasi_RedeemableOperatingPartnershipUnitOutstanding
Payment in cash for redemption of operating partnership units   $ 1,782us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest  
Weighted average number of OP units held by remaining non-controlling interest 331,282hasi_NumberOfOperatingPartnershipUnitsHeldByNoncontrollingInterest   0hasi_NumberOfOperatingPartnershipUnitsHeldByNoncontrollingInterest