XML 64 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Organization and operations (Details) |  |  | 0 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 property state | Dec. 31, 2013 property | Jun. 10, 2013 Operating Partnership Series D Convertible Units | Jun. 10, 2013 Operating Partnership Series E Convertible Units
Organization and operations |  |  |  |
Number of properties | 30,877 | 23,268 |  |
Number of states | 22 |  |  |
Number of properties held for sale | 39 |  |  |
Organization and operations |  |  |  |
Issuance of units (in shares) |  |  | 4,375,000 | 4,375,000

X
- Definition Represents the number of properties held for sale as on balance sheet date. + 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
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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration