Annual report pursuant to Section 13 and 15(d)

Non-Controlling Interest - Analysis of Controlling and Non-Controlling Interest (Parenthetical) (Detail)

v2.4.1.9
Non-Controlling Interest - Analysis of Controlling and Non-Controlling Interest (Parenthetical) (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended
May 23, 2013
Apr. 23, 2013
May 23, 2013
Equity [Abstract]      
Net proceeds received upon exercise by underwriters $ 9.5us-gaap_ProceedsFromIssuanceInitialPublicOffering $ 160.0us-gaap_ProceedsFromIssuanceInitialPublicOffering  
Underwriters shares of common stock     818,356hasi_AdditionalSharesPurchasedByUnderwritersToExerciseOverAllotmentOption