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Real Estate Acquisitions and Dispositions - Additional Information (Detail) | Jul. 20, 2017 apartmentunits | Jul. 13, 2017 apartmentunits | Jun. 30, 2017 a apartmentunits
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Colonial Grand at Lakewood Ranch [Member] |  |  |
Business Acquisitions and Dispositions [Line Items] |  |  |
Square Footage of Real Estate Property | a |  |  | 12
Paddock Club Montgomery [Member] |  |  |
Business Acquisitions and Dispositions [Line Items] |  |  |
Square Footage of Real Estate Property | a |  |  | 1
Charlotte at Midtown [Member] |  |  |
Business Acquisitions and Dispositions [Line Items] |  |  |
Number of Units in Real Estate Property |  |  | 279
Subsequent Event [Member] | Paddock Club Lakeland [Member] |  |  |
Business Acquisitions and Dispositions [Line Items] |  |  |
Number of Units in Real Estate Property |  | 464 |
Subsequent Event [Member] | Northwood [Member] |  |  |
Business Acquisitions and Dispositions [Line Items] |  |  |
Number of Units in Real Estate Property | 270 |  |

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- Definition Acquisitions and Disposals [Line Items] + References No definition available. + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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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. + Details
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- Details
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- Details
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- Details
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