XML 83 R66.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Shareholders' Equity / Partners' Capital - Conversion of Series E Convertible Unit into Series D Convertible Units (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Feb. 29, 2016 USD ($) shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Class of Stock [Line Items] |  |  |  |
Gain on conversion of Series E units | $ | $ 11,500 | $ 0 | $ 0 | $ 11,463
Series E Convertible Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Contingent beneficial conversion, Series E | $ | $ 2,800 |  |  |
Series E Convertible Units | Operating Partnership |  |  |  |
Class of Stock [Line Items] |  |  |  |
Units owned (in shares) | shares | 4,375,000 |  |  |
Series E Convertible Units | AH LLC | Operating Partnership |  |  |  |
Class of Stock [Line Items] |  |  |  |
Units owned (in shares) | shares | 4,375,000 |  |  |
Business acquisition, equity interest issued or issuable, number of shares, multiplier | 1 |  |  |

X
- Definition Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Multiplier + References No definition available. + Details
Name: | amh_BusinessAcquisitionEquityInterestIssuedorIssuableNumberofSharesMultiplier
Namespace Prefix: | amh_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gain (Loss) on Conversion of Convertible Securities + References No definition available. + Details
Name: | amh_GainLossonConversionofConvertibleSecurities
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Noncash Charge Related to the Conversion of Units + References No definition available. + Details
Name: | amh_NoncashChargeRelatedtotheConversionofUnits
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of units of the operating partnership owned by the noncontrolling interest, a related party. + References No definition available. + Details
Name: | amh_NoncontrollingInterestUnitsOwnedInOperatingPartnership
Namespace Prefix: | amh_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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_CapitalUnitsByClassAxis=amh_SeriesEConvertibleUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=amh_OperatingPartnershipLegalEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=amh_AHLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |