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

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Equity Incentive Plan - Additional Information (Detail)

v2.4.0.8

Equity Incentive Plan - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended
	Apr. 23, 2013	Jun. 30, 2013 Y	Jun. 30, 2013 Y
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum equity-based awards as a percentage of common stock issued and outstanding			7.50%
Number of shares received by employee through reallocation	202,826
Value per share under stock based compensation plan	$ 12.50
Compensation expense	$ 5,800,000
Number of restricted common stock granted	606,415
Grant-date fair value of restricted common stock	12.50
Restricted common stock vesting period	4 years
Restricted Incentive [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Assumed forfeiture rate for calculation of compensation expense	5.00%
Equity-based compensation expense associated with restricted stock units		340,056
Unrecognized compensation expense		6,900,000	6,900,000
Weighted-average term in which unrecognized compensation expense is expected to be recognized		2	2
Total fair value of shares vested			$ 0
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares received by employee through reallocation	128,348
OP units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares received by employee through reallocation	135,938

- Definition

Expected Forfeiture Rate In Determining Share Based Compensation Expense

+ References

No definition available.

+ Details

Name:	hasi_ExpectedForfeitureRateInDeterminingShareBasedCompensationExpense
Namespace Prefix:	hasi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum Equity Based Awards Issuable Percentage Of Issued And Outstanding Shares As Of Grant Date

+ References

No definition available.

+ Details

Name:	hasi_MaximumEquityBasedAwardsIssuablePercentageOfIssuedAndOutstandingSharesAsOfGrantDate
Namespace Prefix:	hasi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted Stock Units At Fair Value

+ References

No definition available.

+ Details

Name:	hasi_RestrictedStockUnitsAtFairValue
Namespace Prefix:	hasi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Restricted Stock Units Granted During Period

+ References

No definition available.

+ Details

Name:	hasi_RestrictedStockUnitsGrantedDuringPeriod
Namespace Prefix:	hasi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share Based Compensation Arrangement by Share Based Payment Award Shares Reallocated

+ References

No definition available.

+ Details

Name:	hasi_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesReallocated
Namespace Prefix:	hasi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share Based Compensation Arrangement By Share Based Payment Award Shares Vested Fair Value

+ References

No definition available.

+ Details

Name:	hasi_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesVestedFairValue
Namespace Prefix:	hasi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Stock Based Compensation Not Yet Recognized Weighted Average Period Of Expected Recognition In Years

+ References

No definition available.

+ Details

Name:	hasi_StockBasedCompensationNotYetRecognizedWeightedAveragePeriodOfExpectedRecognitionInYears
Namespace Prefix:	hasi_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Costs and payments related to employee benefits and equity-based compensation, such as pension expense and contributions, other postretirement benefits expense and payments, stock or unit options expense, and amortization of restricted stock or unit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

+ Details

Name:	us-gaap_EmployeeBenefitsAndShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_StockOptionPlanExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration