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Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) property
Purchase Commitment [Line Items]
Single-family properties sales in escrow | property	154
Single-family properties sales in escrow, selling price	$ 48.6
Surety bond
Purchase Commitment [Line Items]
Outstanding principal on non-recourse guarantee	130.0
Single Family Properties
Purchase Commitment [Line Items]
Purchase price of commitment to acquire single-family properties	116.3
Land
Purchase Commitment [Line Items]
Purchase price of commitment to acquire single-family properties	$ 446.1
Commitment To Acquire Properties
Purchase Commitment [Line Items]
Number of properties | property	343

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
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X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

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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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Data Type:	xbrli:stringItemType
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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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X

- Details

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Namespace Prefix:
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- Details

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X

- Details

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Namespace Prefix:
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X

- Details

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