XML 88 R54.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

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

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
- References No definition available. + Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration