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Deferred costs and other intangibles (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Deferred costs and other intangibles
Amortization expense	$ 4.1
Amortization of deferred financing costs	$ 0.6

X

- Definition

Amortization Of Deferred Financing Costs.

+ References

No definition available.

+ Details

Name:	amh_AmortizationOfDeferredFinancingCosts
Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The aggregate amount of amortization of intangible assets and deferred leasing fees.

+ References

No definition available.

+ Details

Name:	amh_AmortizationOfIntangibleAssetsAndDeferredLeasingFees
Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration