XML 68 R54.htm IDEA: XBRL DOCUMENT
v3.21.2

Shareholders' Equity / Partners' Capital - Common Stock Offerings (Details) - USD ($) | 1 Months Ended | 6 Months Ended | 15 Months Ended
--- | --- | --- | ---
Jul. 31, 2021 | May 31, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021
Class of Stock [Line Items] |  |  |  |  |
Offering cost |  |  | $ 200,000 | $ 0 |
Public Stock Offering | Class A common shares/units |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Number of shares sold (in shares) |  | 18,745,000 |  |  |
Par value (in dollars per share) |  | $ 0.01 |  |  |
Public Stock Offering - Issued Directly By The Company | Class A common shares/units |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Number of shares sold (in shares) |  | 5,500,000 |  |  |
Proceeds from sale of stock |  | $ 194,000,000.0 |  |  |
Offering cost |  | $ 200,000 |  |  |
Public Stock Offering - Forward Sales Agreement | Class A common shares/units |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Number of shares sold (in shares) |  | 13,245,000 |  |  |
Public Stock Offering - Forward Sales Agreement | Class A common shares/units | Forecast |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds from sale of stock | $ 467,300,000 |  |  |  |
At the Market - Common Share Offering Program | Class A common shares/units |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Shares authorized for future issuance, value |  |  |  | $ 500,000,000.0 |
Shares issued (in shares) |  |  | 0 | 0 | 86,130,000,000
Shares available for future issuance, value |  |  | $ 497,600,000 |  | $ 497,600,000

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
- Definition Face amount per share of no-par value common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockNoParValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Cash received on stock transaction after deduction of issuance costs. + References No definition available. + Details
Name: | us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=amh_PublicStockOfferingMember
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: |

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

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

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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