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Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2015 USD ($) property	Dec. 31, 2014 USD ($) property
Commitment to renovate homes
Commitments and contingencies
Aggregate outstanding construction commitments	$ 2.2	$ 4.1
Commitment to acquire properties
Commitments and contingencies
Number of properties | property	171	703
Aggregate purchase price	$ 26.4	$ 110.9

X

- Definition

The number of properties the reporting entity is committed to acquire.

+ References

No definition available.

+ Details

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Namespace Prefix:	amh_
Data Type:	xbrli:integerItemType
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Period Type:	instant

X

- Definition

Represents the amount of outstanding construction commitments.

+ References

No definition available.

+ Details

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Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



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Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:
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X

- Details

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