Merger Related Expenses

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- Definition

Property Held for Development

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No definition available.

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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.

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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=64930739&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=64930785&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

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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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No definition available.

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- Definition

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

+ References

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.

+ References

No definition available.

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Consolidation and Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) ft² in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($) ft² Property apartmentunits States Communities shares	Sep. 30, 2016 USD ($) ft² Property apartmentunits States Communities shares	Sep. 30, 2015 USD ($) shares
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding \| shares	75,542,583	75,542,583	75,379,381
Number of owned or owned interests of apartment communities \| Property	251	251
Number of apartments included in a community \| apartmentunits	79,170	79,170
Number of states in which apartment units are located \| States	15	15
Percentage Of Ownership Interests	100.00%	100.00%
Minimum [Member]
Real Estate Properties [Line Items]
Percentage Of Ownership Interests	95.00%	95.00%
Maximum [Member]
Real Estate Properties [Line Items]
Percentage Of Ownership Interests	100.00%	100.00%
Development Properties [Member]
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities \| Communities	3	3
Number of units under development community \| Property	550	550
Development Properties [Member] \| Expected Costs [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 81,800,000	$ 81,800,000
Development Properties [Member] \| Costs Incurred to Date [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress	$ 48,600,000	$ 48,600,000
Retail
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities \| Property	6	6
Square Footage of Real Estate Property \| ft²	194	194
Interest Expense
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment	$ 900,000		$ 2,700,000
Fair Market Value Adjustment and Debt Issuance Cost [Member]
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment			$ 2,700,000
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	$ (19,011,000)	$ (19,011,000)
Common Stock [Member]
Real Estate Properties [Line Items]
Merger Related Expenses		38,000,000
Preferred Stock [Member]
Real Estate Properties [Line Items]
Merger Related Expenses		868,000
Conversion of Stock, Name [Domain]
Real Estate Properties [Line Items]
Merger Related Expenses		0.71
Equity Issued in Business Combination [Member]
Real Estate Properties [Line Items]
Merger Related Expenses		$ 80,000