Deferred Costs and Other Intangibles, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Amortization expense related to deferred leasing costs, in-place leases, trademark and database	$ 1.8	$ 2.9	$ 6.7	$ 7.7
Amortization of deferred financing costs	$ 0.5	$ 0.5	$ 1.5	$ 1.5

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

No definition available.

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