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TSRE Merger - Additional Information (Detail) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 17, 2015 USD ($) Property | Sep. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($)
Business Acquisition [Line Items] |  |  |  |
Gains (losses) on TSRE merger and property acquisitions | $ 64,012 | $ 64,012 | $ 64,012 | $ 2,882
Indebtedness |  | 359,495 | 359,495 |
Trade Street Residential, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value of equity consideration transferred | 123,855 |  |  |
Indebtedness | 359,495 | $ 121,885 | $ 121,885 |
Paid indebtedness | 237,610 |  |  |
Acquisition expenses | 12,530 |  |  |
Expenses associated with extinguishing financing arrangement | 23,219 |  |  |
Expenses associated with employee separation | $ 4,289 |  |  |
Number of properties acquired | Property | 19 |  |  |
Trade Street Residential, Inc. | TSRE Properties |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Gains (losses) on TSRE merger and property acquisitions | $ 30,000 |  |  |
Common Shares | Trade Street Residential, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value of equity consideration transferred | 109,857 |  |  |
Gains (losses) on TSRE merger and property acquisitions | 34,000 |  |  |
Limited Partner | Trade Street Residential, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair value of equity consideration transferred | $ 13,998 |  |  |

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