Deferred Costs and Other Intangibles, Net (Details 2) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Amortization expense	$ 9.2	$ 31.2	$ 13.1
Amortization of deferred financing costs	$ 1.8	$ 2.3	$ 2.4

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