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Shareholders' Equity / Partners' Capital - Noncontrolling Interest (Details) - Operating Partnership - Class A Units - shares | Sep. 30, 2017 | Dec. 31, 2016
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American Residential Properties Inc. |  |
Class of Stock [Line Items] |  |
Percentage of units outstanding | 0.30% | 0.40%
Operating partnership units (in shares) | 1,172,822 | 1,279,316
AH LLC |  |
Class of Stock [Line Items] |  |
Ownership units owned (in shares) | 54,276,644 | 54,276,644
Percentage of units outstanding | 16.50% | 18.20%
Operating partnership units (in shares) | 329,690,244 | 298,931,517

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