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Investments in Real Estate - Summary of Acquisitions (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Property	Dec. 31, 2019 USD ($) Property
Business Acquisition [Line Items]
Units (unaudited) | Property	672	806
Purchase Price | $	$ 145,231	$ 128,925
Adley at Craig Ranch
Business Acquisition [Line Items]
Date of Purchase	Feb. 11, 2020
Units (unaudited) | Property	251
Purchase Price | $	$ 51,204
Legacy at Jones Farm
Business Acquisition [Line Items]
Date of Purchase	Dec. 01, 2020
Units (unaudited) | Property	421
Purchase Price | $	$ 94,027
North Park | Atlanta, GA
Business Acquisition [Line Items]
Date of Purchase		Apr. 30, 2019
Units (unaudited) | Property		224
Purchase Price | $		$ 28,000
Rocky Creek | Florida
Business Acquisition [Line Items]
Date of Purchase		Jul. 11, 2019
Units (unaudited) | Property		264
Purchase Price | $		$ 48,000
Thornhill | North Carolina
Business Acquisition [Line Items]
Date of Purchase		Oct. 01, 2019
Units (unaudited) | Property		318
Purchase Price | $		$ 52,925

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 7
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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