XML 66 R53.htm IDEA: XBRL DOCUMENT
v3.19.2

Shareholders' Equity / Partners' Capital - At the Market Common Share Offering Program (Details) - At the Market - Common Share Offering Program - Class A common shares/units | Jun. 30, 2019 USD ($)
--- | ---
Class of Stock [Line Items] |
Shares authorized for future issuance, value | $ 500,000,000.0
Shares available for future issuance, value | $ 500,000,000.0

X
- Definition Common Stock, Capital Shares Amount Authorized For Future Issuance + References No definition available. + Details
Name: | amh_CommonStockCapitalSharesAmountAuthorizedForFutureIssuance
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Common Stock, Capital Shares Amount Available For Future Issuance + References No definition available. + Details
Name: | amh_CommonStockCapitalSharesAmountAvailableForFutureIssuance
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=amh_AttheMarketCommonShareOfferingProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |