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Shareholders' Equity / Partners' Capital - Noncontrolling Interest (Details) - Class A Units - Operating Partnership - shares | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Class of Stock [Line Items] |  |
Operating partnership units (in shares) | 352,738,054 | 351,966,447
American Residential Properties Inc. |  |
Class of Stock [Line Items] |  |
Percentage of units outstanding | 0.20% | 0.30%
Operating partnership units (in shares) | 596,990 | 1,073,509
AH LLC |  |
Class of Stock [Line Items] |  |
Ownership units owned (in shares) | 51,429,990 | 54,243,317
Percentage of units outstanding | 14.60% | 15.40%

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