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Commitments and Contingencies (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($) single_family_property	Dec. 31, 2016 USD ($) single_family_property
Long-term Purchase Commitment [Line Items]
Single-family properties sales in escrow | single_family_property	188	57
Single-family properties sales in escrow, selling price	$ 20.1	$ 6.6
Single Family Properties
Long-term Purchase Commitment [Line Items]
Commitment to acquire single-family properties | single_family_property	354	203
Purchase price of commitment to acquire single-family properties	$ 73.1	$ 41.7
Land
Long-term Purchase Commitment [Line Items]
Purchase price of commitment to acquire single-family properties	$ 8.9	$ 3.9

X

- Definition

Expected Proceeds from Sale of Property Held-for-sale

+ References

No definition available.

+ Details

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

X

- Definition

Number of Real Estate Properties Held-for-Sale in Escrow

+ References

No definition available.

+ Details

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Namespace Prefix:	amh_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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
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X

- Definition

Number of units of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: