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Deferred Costs and Other Intangibles (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Deferred Costs and Other Intangibles
Amortization expense related to deferred leasing costs, in-place leases, trademark and database	$ 4.0	$ 3.5	$ 7.2	$ 7.7
Amortization of deferred financing costs	$ 2.4	$ 0.9	$ 4.4	$ 1.5

X

- Definition

Amortization Of Deferred Financing Costs.

+ References

No definition available.

+ Details

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

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- 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

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- References

No definition available.

+ Details

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