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Acquisitions and Dispositions (Details 6) (USD $)
 7 Months Ended 6 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2013
Management Internalization      
Acquisitions And Dispositions      
Total revenues $ 1,502,000us-gaap_SalesRevenueNet
/ us-gaap_BusinessAcquisitionAxis
= amh_ManagementInternalizationMember		    
Net (loss) / income (26,179,000)us-gaap_NetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= amh_ManagementInternalizationMember		    
Total revenues and net loss attributable to the management 24,000,000us-gaap_PropertyManagementFeeRevenue
/ us-gaap_BusinessAcquisitionAxis
= amh_ManagementInternalizationMember		    
Alaska Joint Venture Acquisition      
Acquisitions And Dispositions      
Total revenues   38,054,000us-gaap_SalesRevenueNet
/ us-gaap_BusinessAcquisitionAxis
= amh_AlaskaJointVentureAcquisitionMember		  
Net (loss) / income   2,256,000us-gaap_NetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= amh_AlaskaJointVentureAcquisitionMember		  
2013 RJ Transaction      
Acquisitions And Dispositions      
Total revenues     2,723,000us-gaap_SalesRevenueNet
/ us-gaap_BusinessAcquisitionAxis
= amh_TwoThousandThirteenRjTransactionMember
Net (loss) / income     $ 52,000us-gaap_NetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= amh_TwoThousandThirteenRjTransactionMember