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Summary of Acquisitions (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) Property | Dec. 31, 2018 USD ($) Property
Business Acquisition [Line Items] |  |  |
Units (unaudited) | Property |  | 806 | 2,379
Contract Price | $ |  | $ 128,925 | $ 272,948
North Park | Atlanta, GA |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  | Apr. 30, 2019 |
Units (unaudited) | Property |  | 224 |
Contract Price | $ |  | $ 28,000 |
Rocky Creek | Tampa-St. Petersburg, FL |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  | Jul. 11, 2019 |
Units (unaudited) | Property |  | 264 |
Contract Price | $ |  | $ 48,000 |
Thornhill | Raleigh, NC |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  | Oct. 01, 2019 |
Units (unaudited) | Property |  | 318 |
Contract Price | $ |  | $ 52,925 |
Creekside Corners | Atlanta, GA |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [1] |  | Jan. 03, 2018
Units (unaudited) | Property | [1] |  | 444
Contract Price | $ | [1] |  | $ 43,901
Hartshire Lakes | Indianapolis, IN |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [1] |  | Jan. 03, 2018
Units (unaudited) | Property | [1] |  | 272
Contract Price | $ | [1] |  | $ 27,597
The Chelsea | Columbus, OH |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Jan. 04, 2018
Units (unaudited) | Property |  |  | 312
Contract Price | $ |  |  | $ 36,750
Avalon Oaks | Columbus, OH |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Feb. 27, 2018
Units (unaudited) | Property |  |  | 235
Contract Price | $ |  |  | $ 23,000
Bridgeview | Tampa-St. Petersburg, FL |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Jul. 11, 2018
Units (unaudited) | Property |  |  | 348
Contract Price | $ |  |  | $ 43,000
Collier Park | Columbus, OH |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Jul. 26, 2018
Units (unaudited) | Property |  |  | 232
Contract Price | $ |  |  | $ 21,200
Waterford | Atlanta, GA |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Oct. 11, 2018
Units (unaudited) | Property |  |  | 260
Contract Price | $ |  |  | $ 30,500
Lucerne | Tampa-St. Petersburg, FL |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Nov. 07, 2018
Units (unaudited) | Property |  |  | 276
Contract Price | $ |  |  | $ 47,000
[1] | These properties were acquired as the last phase of our acquisition of a nine-community portfolio (the “HPI Portfolio”), totaling 2,352 units (unaudited), which we agreed to acquire on September 3, 2017 for a total purchase price of $228,144

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