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Acquisitions - Merger with American Residential Properties - Tables (Details) - American Residential Properties Inc. - USD ($) $ / shares in Units, $ in Thousands |  | 10 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2016 | Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Assets Assumed and Liabilities Acquired [Abstract] |  |  |  |  |  |
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 |  |  |  |  |
Debt assumed or extinguished | 792,001 |  |  |  |  |
Equity transaction consideration | 530,460 |  |  |  |  |
Total transaction consideration | 1,322,461 |  |  |  |  |
Revenues and Income Attributable to Business Combination [Abstract] |  |  |  |  |  |
Total revenues |  | $ 119,245 |  |  |  |
Net income |  | $ 1,237 |  |  |  |
Pro Forma Supplemental Information [Abstract] |  |  |  |  |  |
Pro forma total revenues |  |  |  |  | $ 900,958 | $ 754,710
Pro forma net loss |  |  |  |  | $ (8,989) | $ (54,995)
Pro forma net loss per share (in dollars per share) |  |  |  |  | $ (0.22) | $ (0.37)
Credit facility |  |  |  |  |  |
Assets Assumed and Liabilities Acquired [Abstract] |  |  |  |  |  |
Debt assumed or extinguished | 350,000 |  |  |  |  |
Exchangeable senior notes |  |  |  |  |  |
Assets Assumed and Liabilities Acquired [Abstract] |  |  |  |  |  |
Debt assumed or extinguished | 112,298 |  | $ 0 | $ 0 | $ 112,298 |
Asset-backed securitization |  |  |  |  |  |
Assets Assumed and Liabilities Acquired [Abstract] |  |  |  |  |  |
Debt assumed or extinguished | $ 329,703 |  | $ 0 | $ 0 | $ 329,703 |

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