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Investments in Real Estate - Additional Information (Detail) | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2018 USD ($) Property | Sep. 30, 2018 USD ($) Property | Dec. 31, 2017 USD ($)
Real Estate Properties [Line Items] |  |  |
Number of multifamily properties owned |  | 58 |
Number of units located with multifamily properties |  | 15,860 |
Real estate properties held for sale | $ |  | $ 141,853,000 | $ 0
Number of units in real estate properties acquired |  | 1,843 |
Purchase Price | $ |  | $ 195,448,000 |
Subsequent Event | McDonough, GA | Waterford Landing |  |  |
Real Estate Properties [Line Items] |  |  |
Number of units in real estate properties acquired | 260 |  |
Purchase Price | $ | $ 30,500,000 |  |
Held-for-sale |  |  |
Real Estate Properties [Line Items] |  |  |
Number of multifamily properties owned |  | 5 |
Number of units located with multifamily properties |  | 1,348 |
Real estate properties held for sale | $ |  | $ 141,853,000 | $ 0

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- Definition Payments to acquire real estate including transaction fees. + 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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- Definition Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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