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Contributions by AH LLC (Details) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Feb. 28, 2013
property
Dec. 12, 2014
Jun. 14, 2013
Jun. 11, 2013
Dec. 31, 2011
Significant Acquisitions and Disposals                
Contributed single-family properties value $ 5,916,933,000us-gaap_RealEstateGrossAtCarryingValue $ 3,923,624,000us-gaap_RealEstateGrossAtCarryingValue $ 507,845,000us-gaap_RealEstateGrossAtCarryingValue         $ 3,516,000us-gaap_RealEstateGrossAtCarryingValue
Units issue to Sponsor, value   500,000us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance            
Units issue to Sponsor, value 1,546,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest 35,817,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest 369,371,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest          
2012 Offering                
Significant Acquisitions and Disposals                
Number of properties     367amh_ContributionOfPropertyNumberOfProperties
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Investment made in cash by Sponsor     600,000amh_CashContribution
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Contributed single-family properties value     49,400,000us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Acquisition Fee Rate     5.00%amh_AcquisitionFeeRate
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Net book value     47,600,000us-gaap_ContributionOfProperty
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Costs to transfer title to the properties     500,000amh_ExpensesRelatingToAgreement
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
2,770 Property Contribution                
Significant Acquisitions and Disposals                
Number of properties       2,770amh_ContributionOfPropertyNumberOfProperties
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Class A Units                
Significant Acquisitions and Disposals                
Units issue to Sponsor (in shares)     32,667amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions
/ us-gaap_CapitalUnitsByClassAxis
= amh_ClassAUnitsMember		          
Class A common shares | 2012 Offering                
Significant Acquisitions and Disposals                
Common shares issue to Sponsor in 2012 offering     3,300,000us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Sponsor | 2,770 Property Contribution                
Significant Acquisitions and Disposals                
Common shares issue to Sponsor per share       15.50us-gaap_SharePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Total consideration amount       491,700,000amh_StockAndUnitsIssued
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Sponsor | Class A Units                
Significant Acquisitions and Disposals                
Units issue to Sponsor (in shares)         653,378amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions
/ us-gaap_CapitalUnitsByClassAxis
= amh_ClassAUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember		      
Common units issue to Sponsor per unit         $ 17.11amh_PurchasePricePerUnit
/ us-gaap_CapitalUnitsByClassAxis
= amh_ClassAUnitsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember		      
Sponsor | Class A common shares                
Significant Acquisitions and Disposals                
Common shares issue to Sponsor in 2012 offering           705,167us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember		    
Units issue to Sponsor, value           11,300,000us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember		    
Sponsor | Class B common shares                
Significant Acquisitions and Disposals                
Common shares issue to Sponsor in 2012 offering       634,408us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember		        
Units issue to Sponsor, value       7,700,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember		        
Sponsor | Class B common shares | 2012 Offering                
Significant Acquisitions and Disposals                
Common shares issue to Sponsor in 2012 offering     667us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
/ us-gaap_SubsidiarySaleOfStockAxis
= amh_TwoThousandAndTwelveOfferingMember		          
Sponsor | Class B common shares | 2,770 Property Contribution                
Significant Acquisitions and Disposals                
Common shares issue to Sponsor in 2012 offering       634,408us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Operating Partnership | Sponsor | Series C Convertible Units                
Significant Acquisitions and Disposals                
Units issue to Sponsor, value       378,800,000us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
/ us-gaap_CapitalUnitsByClassAxis
= amh_SeriesCConvertiblePreferredUnitsMember
/ dei_LegalEntityAxis
= amh_OperatingPartnershipLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember		        
Operating Partnership | Sponsor | Series C Convertible Units | 2,770 Property Contribution                
Significant Acquisitions and Disposals                
Units issue to Sponsor (in shares)       31,085,974amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions
/ us-gaap_CapitalUnitsByClassAxis
= amh_SeriesCConvertiblePreferredUnitsMember
/ dei_LegalEntityAxis
= amh_OperatingPartnershipLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Common units issue to Sponsor per unit       15.50amh_PurchasePricePerUnit
/ us-gaap_CapitalUnitsByClassAxis
= amh_SeriesCConvertiblePreferredUnitsMember
/ dei_LegalEntityAxis
= amh_OperatingPartnershipLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Units issue to Sponsor, value       378,800,000us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
/ us-gaap_CapitalUnitsByClassAxis
= amh_SeriesCConvertiblePreferredUnitsMember
/ dei_LegalEntityAxis
= amh_OperatingPartnershipLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Operating Partnership | Sponsor | Class A Units                
Significant Acquisitions and Disposals                
Units issue to Sponsor (in shares)             12,395,965amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions
/ us-gaap_CapitalUnitsByClassAxis
= amh_ClassAUnitsMember
/ dei_LegalEntityAxis
= amh_OperatingPartnershipLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_SponsorMember		  
Sponsor | Class A Units                
Significant Acquisitions and Disposals                
Units issue to Sponsor (in shares)         653,378amh_PartnersCapitalAccountUnitsIssuedDuringPeriodAcquisitions
/ us-gaap_CapitalUnitsByClassAxis
= amh_ClassAUnitsMember
/ dei_LegalEntityAxis
= amh_SponsorLegalEntityMember		      
Common units issue to Sponsor per unit         $ 17.11amh_PurchasePricePerUnit
/ us-gaap_CapitalUnitsByClassAxis
= amh_ClassAUnitsMember
/ dei_LegalEntityAxis
= amh_SponsorLegalEntityMember		      
Sponsor | Class B common shares | 2,770 Property Contribution                
Significant Acquisitions and Disposals                
Units issue to Sponsor, value       7,700,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
/ dei_LegalEntityAxis
= amh_SponsorLegalEntityMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Sponsor | Operating Partnership                
Significant Acquisitions and Disposals                
Net book value       386,500,000us-gaap_ContributionOfProperty
/ dei_LegalEntityAxis
= amh_SponsorLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_OperatingPartnershipRelatedPartyMember		        
Sponsor | Operating Partnership | 2,770 Property Contribution                
Significant Acquisitions and Disposals                
Number of properties       2,770amh_ContributionOfPropertyNumberOfProperties
/ dei_LegalEntityAxis
= amh_SponsorLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_OperatingPartnershipRelatedPartyMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember		        
Net book value       386,500,000us-gaap_ContributionOfProperty
/ dei_LegalEntityAxis
= amh_SponsorLegalEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= amh_OperatingPartnershipRelatedPartyMember
/ us-gaap_TypeOfArrangementAxis
= amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember