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Acquisitions - Estimated Fair Values of Assets and Liabilities Acquired (Details) - American Residential Properties Inc. - USD ($) $ in Thousands |  | 9 Months Ended
--- | --- | ---
Feb. 29, 2016 | Sep. 30, 2016 | Sep. 30, 2015
Business Acquisition [Line Items] |  |  |
Land | $ 262,396 |  |
Buildings and improvements | 1,014,857 |  |
Cash and cash equivalents | 15,499 |  |
Restricted cash | 9,521 |  |
Rent and other receivables | 843 |  |
Escrow deposits, prepaid expenses and other assets | 35,134 |  |
In-place leases | 22,696 |  |
Accounts payable and accrued expenses | (38,485) |  |
Net assets acquired | 1,322,461 |  |
Total debt assumed or extinguished | 792,001 |  |
Equity transaction consideration | 530,460 |  |
Total transaction consideration | 1,322,461 |  |
Credit facility |  |  |
Business Acquisition [Line Items] |  |  |
Total debt assumed or extinguished | 350,000 | $ 350,000 | $ 0
Exchangeable senior notes |  |  |
Business Acquisition [Line Items] |  |  |
Total debt assumed or extinguished | 112,298 | 112,298 | 0
Asset-backed securitization |  |  |
Business Acquisition [Line Items] |  |  |
Total debt assumed or extinguished | $ 329,703 | $ 329,703 | $ 0

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