Quarterly report pursuant to Section 13 or 15(d)

Nonrecourse Debt - Additional Information (Detail)

v3.3.0.814
Nonrecourse Debt - Additional Information (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2015
USD ($)
Subsidiaries
Dec. 31, 2014
USD ($)
Debt Instrument [Line Items]    
Nonrecourse Asset-Backed Debt, Aggregate Principal Amount $ 288,300 $ 208,246
Cost on issuance of Notes $ 12,000  
Nonrecourse Asset-Backed Debt Agreement [Member]    
Debt Instrument [Line Items]    
Number of special purpose subsidiaries | Subsidiaries 22  
Cost on issuance of Notes $ 6,000  
Nonrecourse Asset-Backed Debt Agreement [Member] | HASI Sustainable Yield Bond 2015-1A [Member]    
Debt Instrument [Line Items]    
Nonrecourse Asset-Backed Debt, Aggregate Principal Amount $ 101,000  
Nonrecourse Asset-Backed Debt, Interest Rate 4.28%  
Nonrecourse Asset-Backed Debt, Maturity Date 2034-10  
Nonrecourse Asset-Backed Debt Agreement [Member] | HASI Sustainable Yield Bond 2015-1B [Member]    
Debt Instrument [Line Items]    
Nonrecourse Asset-Backed Debt, Aggregate Principal Amount $ 18,000  
Nonrecourse Asset-Backed Debt, Interest Rate 5.00%  
Nonrecourse Asset-Backed Debt, Maturity Date 2034-10  
Other Nonrecourse Debt [Member]    
Debt Instrument [Line Items]    
Financing receivables securing debt, carrying value $ 101,000 $ 108,000