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Investments in Real Estate - Additional Information (Detail) |  | 3 Months Ended |
--- | --- | --- | ---
Feb. 27, 2017 USD ($) Property | Mar. 31, 2017 USD ($) Property | Dec. 31, 2016 USD ($)
Real Estate Properties [Line Items] |  |  |
Number of multifamily properties owned | Property |  | 47 |
Number of units located with multifamily properties | Property |  | 13,198 |
Real estate held for sale (see Note 3) |  | $ 61,102,000 | $ 60,786,000
Acquisition of real estate properties |  | 28,700,000 |
Purchase price allocation adjustments |  | $ 0 |
Tampa , Florida | Lakes of Northdale |  |  |
Real Estate Properties [Line Items] |  |  |
Real estate held for sale (see Note 3) | $ 29,750,000 |  |
Number of multifamily property acquired | Property | 216 |  |
Acquisition of real estate properties | $ 29,750,000 |  |

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