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Summary of Acquisitions (Parenthetical) (Detail) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 03, 2017 USD ($) Property | Dec. 31, 2017 USD ($) Property
Business Acquisition [Line Items] |  |
Units (unaudited) | Property |  | 2,340
Purchase Price |  | $ 243,585
Defeasance costs related to properties acquired | $ 3,624 |
HPI Portfolio |  |
Business Acquisition [Line Items] |  |
Units (unaudited) | Property | 2,353 |
Purchase Price | $ 228,144 |

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- Definition The number of units in a real estate property acquired. + References No definition available. + Details
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- Definition Payments to acquire real estate including transaction fees. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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