XML 24 R29.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Organization and operations (Details) | 0 Months Ended |  |
--- | --- | --- | ---
Jun. 10, 2013 | Mar. 31, 2015 property state | Dec. 31, 2014 property
Organization and operations |  |  |
Number of properties |  | 36,588 us-gaap_NumberOfRealEstateProperties | 34,599 us-gaap_NumberOfRealEstateProperties
Number of states |  | 22 us-gaap_NumberOfStatesInWhichEntityOperates |
Number of Properties Held for Sale |  | 35 amh_NumberOfPropertiesHeldForSale |
Operating Partnership | Series D Convertible Units |  |  |
Organization and operations |  |  |
Units issued to AH LLC (in shares) | 4,375,000 amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions / us-gaap_CapitalUnitsByClassAxis = amh_SeriesDConvertibleUnitsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember |  |
Operating Partnership | Series E Convertible Units |  |  |
Organization and operations |  |  |
Units issued to AH LLC (in shares) | 4,375,000 amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions / us-gaap_CapitalUnitsByClassAxis = amh_SeriesEConvertiblePreferredUnitsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember |  |

X
- Definition Represents the number of properties that are held for sale by the entity/ + References No definition available. + Details
Name: | amh_NumberOfPropertiesHeldForSale
Namespace Prefix: | amh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units issued during the period pursuant to acquisitions. + References No definition available. + Details
Name: | amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions
Namespace Prefix: | amh_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | amh_ScheduleOfDescriptionOfBusinessLineItems
Namespace Prefix: | amh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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