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Real Estate Acquisitions and Dispositions - Schedule of Real Estate Asset Acquisitions and Dispositions (Details)	9 Months Ended
	Sep. 30, 2019 ft² a ApartmentUnit
Atlanta, GA | Land [Member] | Peachtree Road Outparcel [Member]
Business Acquisitions and Dispositions [Line Items]
Area of Land	1
Disposal Date	2019-02
Huntsville, AL | Land [Member] | Colonial Promenade Outparcel [Member]
Business Acquisitions and Dispositions [Line Items]
Area of Land	4
Disposal Date	2019-04
Memphis,TN | Commercial Real Estate [Member] | Poplar Avenue Office [Member]
Business Acquisitions and Dispositions [Line Items]
Square Footage of Real Estate Property | ft²	42,000
Disposal Date	2019-03
Novel Midtown [Member] | Phoenix, AZ | Multifamily [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property | ApartmentUnit	345
Acquisition Date	2019-02
North Orange Avenue Outparcel [Member] | Orlando, FL | Land [Member]
Business Acquisitions and Dispositions [Line Items]
Area of Land	2
Acquisition Date	2019-04
220 Riverside Retail [Member] | Jacksonville, FL | Commercial Real Estate [Member]
Business Acquisitions and Dispositions [Line Items]
Square Footage of Real Estate Property | ft²	14,941
Acquisition Date	2019-08

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- Definition

Acquisitions and Disposals [Line Items]

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Real estate, acquisition date.

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Real estate, disposition date.

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Area of land held.

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Area of a real estate property.

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

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