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Summary of Acquisitions (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Property | Dec. 31, 2017 USD ($) Property
Business Acquisition [Line Items] |  |  |
Units (unaudited) | Property |  | 2,379 | 2,340
Contract Price | $ |  | $ 272,948 | $ 243,585
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 |
Lakes of Northdale | Tampa-St. Petersburg, FL |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | Feb. 27, 2017
Units (unaudited) | Property |  |  | 216
Contract Price | $ |  |  | $ 29,750
Haverford Place | Lexington, KY |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase |  |  | May 24, 2017
Units (unaudited) | Property |  |  | 160
Contract Price | $ |  |  | $ 14,240
Village at Auburn | Durham, NC |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [2] |  | Jun. 30, 2017
Units (unaudited) | Property | [2] |  | 328
Contract Price | $ | [2] |  | $ 42,950
Cherry Grove | North Myrtle Beach, SC |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Sep. 26, 2017
Units (unaudited) | Property | [3] |  | 172
Contract Price | $ | [3] |  | $ 16,157
Riverchase | Indianapolis, IN |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Sep. 26, 2017
Units (unaudited) | Property | [3] |  | 216
Contract Price | $ | [3] |  | $ 18,899
Kensington | Canal Winchester, OH |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Sep. 26, 2017
Units (unaudited) | Property | [3] |  | 264
Contract Price | $ | [3] |  | $ 24,409
Schirm Farms | Canal Winchester, OH |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Sep. 26, 2017
Units (unaudited) | Property | [3] |  | 264
Contract Price | $ | [3] |  | $ 23,749
Live Oak Trace | Baton Rouge, LA |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Oct. 25, 2017
Units (unaudited) | Property | [3] |  | 264
Contract Price | $ | [3] |  | $ 28,501
Tides at Calabash | Wilmington, NC |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Nov. 14, 2017
Units (unaudited) | Property | [3] |  | 168
Contract Price | $ | [3] |  | $ 14,269
Brunswick Point | Wilmington, NC |  |  |
Business Acquisition [Line Items] |  |  |
Date of Purchase | [3] |  | Dec. 12, 2017
Units (unaudited) | Property | [3] |  | 288
Contract Price | $ | [3] |  | $ 30,661
[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.
[2] | This property was acquired from a joint venture of which our former advisor was a controlling member. See Note 8: Related Party Transactions and Arrangements. In conjunction with this acquisition, we issued IROP units to third parties that were members of the joint venture that owned the property. See Note 6: Stockholder Equity and Noncontrolling Interests.
[3] | These properties were acquired as a part of our acquisition of 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. In connection with the acquisition of these properties, we incurred defeasance costs totaling $3,624, which are included in Acquisition related debt extinguishment expenses within the Consolidated Statements of Operations.

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