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Investments in Real Estate - Summary of Acquisitions (Detail) $ in Thousands | 12 Months Ended
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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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