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Shareholders' Equity / Partners' Capital - Noncontrolling Interest Narrative (Details) - Class A Units - shares | Dec. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016
--- | --- | --- | ---
American Residential Properties Inc. |  |  |
Class of Stock [Line Items] |  |  |
Units outstanding (in shares) |  |  | 1,343,843
Operating Partnership |  |  |
Class of Stock [Line Items] |  |  |
Equity interest rate | 83.80% | 81.40% |
Units outstanding (in shares) | 342,099,865 | 298,931,517 |
Operating Partnership | American Residential Properties Inc. |  |  |
Class of Stock [Line Items] |  |  |
Equity interest rate | 0.30% | 0.40% |
Units outstanding (in shares) | 1,073,509 | 1,279,316 |
AH LLC |  |  |
Class of Stock [Line Items] |  |  |
Units owned (in shares) | 54,276,644 |  |
AH LLC | Operating Partnership |  |  |
Class of Stock [Line Items] |  |  |
Equity interest rate | 15.90% | 18.20% |

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