Deferred Costs and Other Intangibles, Net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Amortization expense	$ 8.0	$ 11.0	$ 9.2
Amortization of deferred financing costs	$ 2.0	$ 2.0	$ 1.8

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