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 - Summary of Unvested Shares of Restricted Common Stock (Detail)

v2.4.1.9

Equity - Summary of Unvested Shares of Restricted Common Stock (Detail) (Restricted Incentive [Member], USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Restricted Incentive [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Restricted Shares of Common Stock	964,820	598,815
Granted, Restricted Shares of Common Stock	564,716	529,100
Vested, Restricted Shares of Common Stock	(9,250)	(149,709)
Forfeited, Restricted Shares of Common Stock		(13,386)
Ending Balance, Restricted Shares of Common Stock	1,520,286	964,820
Beginning Balance, Weighted Average Share Price	$ 13.41	$ 12.50
Granted, Weighted Average Share Price	$ 17.27	$ 14.18
Vested, Weighted Average Share Price	$ 14.61	$ 12.50
Forfeited, Weighted Average Share Price		$ 12.99
Ending Balance, Weighted Average Share Price	$ 14.84	$ 13.41
Beginning Balance, Fair Value of Restricted Shares of Common Stock	$ 12.9	$ 7.5
Granted, Fair Value of Restricted Shares of Common Stock	9.8	7.5
Vested, Fair Value of Restricted Shares of Common Stock	(0.1)	(1.9)
Forfeited, Fair Value of Restricted Shares of Common Stock		(0.2)
Ending Balance, Fair Value of Restricted Shares of Common Stock	$ 22.6	$ 12.9

- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Fair Value

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Fair Value

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Fair Value

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Fair Value

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ 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 (c)(1)(iv)(3)

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Publisher FASB

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Name Accounting Standards Codification

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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