Property Held for Development

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- Definition

Percentage Of Ownership Interests

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No definition available.

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- Definition

Area of a real estate property.

+ References

No definition available.

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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- Definition

The number of general partner units outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section F

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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- Definition

The number of states the entity operates in as of the balance sheet date.

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

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No definition available.

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- Definition

The amount of a reclassification adjustment made to prior period financial statement amounts.

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Consolidation and Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) ft² in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015 USD ($) shares	Jun. 30, 2016 USD ($) ft² Property apartmentunits States Communities shares	Jun. 30, 2015 USD ($) shares
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding \| shares	75,375,027	75,524,086	75,375,027
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest		94.80%	94.70%
Number of owned or owned interests of apartment communities \| Property		256
Number of apartments included in a community \| apartmentunits		80,300
Number of states in which apartment units are located \| States		15
Percentage Of Ownership Interests		100.00%
Maximum [Member]
Real Estate Properties [Line Items]
Percentage Of Ownership Interests		100.00%
Development Properties [Member]
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities \| Communities		4
Number of units under development community \| Property		628
Development Properties [Member] \| Expected Costs [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress		$ 96,900
Development Properties [Member] \| Costs Incurred to Date [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress		$ 49,400
Retail
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities \| Property		6
Square Footage of Real Estate Property \| ft²		194
Interest Expense
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment	$ 900		$ 1,800
Fair Market Value Adjustment and Debt Issuance Cost [Member]
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment			$ 1,800
Secured Debt [Member] \| $750 million unsecured revolving credit facility [Member] \| Fair Market Value Adjustment and Debt Issuance Cost [Member]
Real Estate Properties [Line Items]
Debt Instrument, Face Amount		$ (19,019)