Hannon Armstrong Sustainable Infrastructure Capital, Inc. Annual report pursuant to Section 13 and 15(d)

Nonrecourse Debt - Additional Information (Detail)

v3.3.1.900

Nonrecourse Debt - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Nonrecourse Asset-Backed Debt, Aggregate Principal Amount	$ 563,189,000	$ 206,671,000
Ineffectiveness recorded on designated hedges	0
Hedges Outstanding		0
Reclassification out of Accumulated Other Comprehensive Income [Member]
Debt Instrument [Line Items]
Interest Expense	0
Nonrecourse Asset-Backed Debt Agreement [Member] \| HASI Sustainable Yield Bond 2015-1A ("HASI SYB") [Member]
Debt Instrument [Line Items]
Nonrecourse Asset-Backed Debt, Aggregate Principal Amount	$ 101,000,000
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	$ 18,000,000
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	$ 97,000,000	$ 108,000,000

- Definition

Debt Instruments Maturity Date Month And Year

+ References

No definition available.

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- Definition

Ineffectiveness recorded on designated hedges.

+ References

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

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- Definition

Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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- Definition

Amount of debt for which creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property.

+ References

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of finance receivables which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=55761124&loc=SL6224234-111729

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