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Shareholders' Equity / Partners' Capital - Noncontrolling Interest Narrative (Details) - Class A Units - shares	Dec. 31, 2018	Dec. 31, 2017	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%
Units outstanding (in shares)	351,966,447	342,099,865
Operating Partnership | American Residential Properties Inc.
Class of Stock [Line Items]
Equity interest rate	0.30%
Units outstanding (in shares)		1,073,509
AH LLC
Class of Stock [Line Items]
Units owned (in shares)	54,243,317	54,276,644
AH LLC | Operating Partnership
Class of Stock [Line Items]
Equity interest rate	15.40%	15.90%

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+ References

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-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
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