Acquisition And Renovation Fee.

No definition available.

Name:	amh_AcquisitionAndRenovationFee
Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of fee paid to AH LLC, in relation to acquisition and renovation services rendered to the Company.

+ References

No definition available.

+ Details

Name:	amh_AcquisitionAndRenovationFeePercent
Namespace Prefix:	amh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of expenses related to the Advisor for designing and implementing the business strategy and administering the business activities and day-to-day operations of the reporting entity.

+ References

No definition available.

+ Details

Name:	amh_AdvisoryManagementExpense
Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount expensed related to property acquisitions with in-place leases.

+ References

No definition available.

+ Details

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Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The monthly payment which the related party must make under the terms of the agreement for the maintenance and use of certain intellectual property.

+ References

No definition available.

+ Details

Name:	amh_MonthlyPaymentRequiredFromRelatedPartyForUseOfIntellectualProperty
Namespace Prefix:	amh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of shares owned by the noncontrolling interest, a related party.

+ References

No definition available.

+ Details

Name:	amh_NoncontrollingInterestSharesOwned
Namespace Prefix:	amh_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units of the operating partnership owned by the noncontrolling interest, a related party.

+ References

No definition available.

+ Details

Name:	amh_NoncontrollingInterestUnitsOwnedInOperatingPartnership
Namespace Prefix:	amh_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10.(c)(7)(ii))

-URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 10

-Paragraph c

-Subparagraph 3(ii)(A)

-Article 4

+ Details

Name:	us-gaap_AcquisitionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.17)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 17

-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(3),(4))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 3, 4

-Article 9

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=amh_OperatingPartnershipLegalEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=amh_MalibuManagementIncMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=amh_SponsorMember
Namespace Prefix:
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Related party transactions (Details) (USD $)	3 Months Ended
Related party transactions (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Nov. 30, 2012
Related Party Transaction
Payable to (receivable from) affiliate	$ 2,609,000
AH LLC
Related Party Transaction
Equity interest rate (as a percent)	21.80%		21.80%
Payable to (receivable from) affiliate	2,600,000		(4,000,000)
AH LLC \| Class A common shares
Related Party Transaction
Equity interest rate (as a percent)	3.30%		3.30%
AH LLC \| Class B common shares
Related Party Transaction
Shares owned	635,075		635,075
AH LLC \| Agreement on Investment Opportunities
Related Party Transaction
Acquisition and renovation fee in percent				5.00%
Monthly maintenance fee	100,000
Acquisition and renovation fees		17,600,000
Asset acquisition cost		17,300,000
Property acquisition cost		300,000
MMI
Related Party Transaction
Administrative expenses paid to related party		$ 9,000,000
Operating Partnership \| Series C Convertible Units
Related Party Transaction
Units owned (in shares)	31,085,974		31,085,974
Operating Partnership \| Class A common shares
Related Party Transaction
Units owned (in shares)	14,440,670		14,440,670
Operating Partnership \| AH LLC \| Class A Units
Related Party Transaction
Equity interest rate (as a percent)	6.40%		6.40%
Units owned (in shares)	14,440,670		14,440,670
Operating Partnership \| AH LLC \| Series C Convertible Units
Related Party Transaction
Units owned (in shares)	31,085,974		31,085,974
Operating Partnership \| AH LLC \| Series D Convertible Units
Related Party Transaction
Units owned (in shares)	4,375,000		4,375,000
Operating Partnership \| AH LLC \| Series E Convertible Units
Related Party Transaction
Units owned (in shares)	4,375,000		4,375,000