Annual report pursuant to Section 13 and 15(d)

The Company - Schedule of Purchase Price Allocation (Detail)

v2.4.1.9
The Company - Schedule of Purchase Price Allocation (Detail) (AWCC [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
AWCC [Member]
 
Business Acquisition [Line Items]  
Financing receivables $ 37.2us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= hasi_AwccMember
Real estate 66.6us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= hasi_AwccMember
Real estate related intangibles 20.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= hasi_AwccMember
Goodwill 2.1us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hasi_AwccMember
Net working capital 0.1hasi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetWorkingCapital
/ us-gaap_BusinessAcquisitionAxis
= hasi_AwccMember
Purchase Price $ 126.0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= hasi_AwccMember