Accrued Acquisition And Renovation Fee.

No definition available.

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Period Type:	duration

- Definition

Acquisition And Renovation Fee.

+ References

No definition available.

+ Details

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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

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- 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

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Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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- Definition

Decrease In Advisory Fee

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Management And Advisory Fees Percentage

+ References

No definition available.

+ Details

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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

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- Definition

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

+ References

No definition available.

+ Details

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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

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Namespace Prefix:	amh_
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Balance Type:	na
Period Type:	instant

- Definition

The amount paid to a related party for property management services, as a percentage of collected rents.

+ References

No definition available.

+ Details

Name:	amh_PropertyManagementFeePercentageOfCollectedRent
Namespace Prefix:	amh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount paid to a related party for property management services, as a percentage of each lease's annual rent.

+ References

No definition available.

+ Details

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Namespace Prefix:	amh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount for accounts payable to 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))

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-Section 50

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-Publisher SEC

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

-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (SX 210.9-03.15(5))

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-Name Accounting Standards Codification

-Topic 944

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-Subparagraph (SX 210.7-03.17)

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 17

-Article 7

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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

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- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

+ 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

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-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

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-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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Article 7

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.3)

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-Topic 942

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

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

+ Details

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Period Type:	instant

- Definition

Amount of expenses related to the managing member or general partner for management of the day-to-day business functions of the limited liability company (LLC) or limited partnership (LP).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

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

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Amount of cash outflow for costs that are essential to originate the lease and would not otherwise have been incurred without the lease agreement. Amount includes, but is not limited to, cash outflows to evaluate the lessee's credit condition, guarantees, and collateral and cash outflows for costs incurred in negotiating, processing, and executing the lease agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	duration

- Details

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- Details

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Related party transactions (Details) (USD $)	0 Months Ended	12 Months Ended			1 Months Ended
Related party transactions (Details) (USD $)	Feb. 28, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Nov. 30, 2012
Related Party Transaction
Permanent reduction in advisory fee	$ 9,800,000amh_DecreaseInAdvisoryFee
Administrative expenses paid to related party		6,352,000amh_AdvisoryManagementExpense	937,000amh_AdvisoryManagementExpense
Asset acquisition cost			455,000us-gaap_AcquisitionCosts
Sponsor
Related Party Transaction
Equity interest rate (as a percent)		24.60%		21.80%
Receivable from sponsor		4,500,000		4,000,000
Administrative expenses paid to related party		1,000,000	6,900,000
Sponsor \| Class A Units
Related Party Transaction
Units owned (in shares)		13,787,292		14,440,670
Sponsor \| Series C Convertible Units
Related Party Transaction
Units owned (in shares)		31,085,974		31,085,974
Sponsor \| Series D Convertible Units
Related Party Transaction
Units owned (in shares)		4,375,000		4,375,000
Sponsor \| Series E Convertible Units
Related Party Transaction
Units owned (in shares)		4,375,000		4,375,000
Sponsor \| Class A common shares
Related Party Transaction
Equity interest rate (as a percent)		3.70%		3.30%
Sponsor \| Class B common shares
Related Party Transaction
Shares owned		635,075		635,075
Sponsor \| Agreement on Investment Opportunities
Related Party Transaction
Acquisition and renovation fee in percent					5.00%
Monthly maintenance fee				100,000
Acquisition and renovation fees		113,700,000	4,600,000	86,000,000
Asset acquisition cost		108,900,000	4,200,000	67,500,000
Property acquisition cost		4,800,000	400,000	22,100,000
Accrued acquisition and renovation fees		2,600,000
Advisor
Related Party Transaction
Advisory management fee in percent					1.75%
Permanent reduction in advisory fee					9,800,000
Administrative expenses paid to related party		6,400,000
Accrued management fees			900,000
Property Manager
Related Party Transaction
Property management fee, percentage of collected rent					6.00%
Property management fee, percentage of lease annual rent					50.00%
Fees incurred to the Property Manager		1,300,000	12,000
Leasing fees incurred to the Property Manager		2,900,000	100,000
MMI
Related Party Transaction
Administrative expenses paid to related party		$ 17,000,000		$ 41,900,000
Operating Partnership \| Class A Units
Related Party Transaction
Equity interest rate (as a percent)		93.10%		93.60%
Operating Partnership \| Series E Convertible Units
Related Party Transaction
Units owned (in shares)				4,375,000
Operating Partnership \| Sponsor \| Class A Units
Related Party Transaction
Units owned (in shares)		13,787,292		14,440,670
Equity interest rate (as a percent)		6.90%		6.40%
Operating Partnership \| Sponsor \| Series C Convertible Units
Related Party Transaction
Units owned (in shares)		31,085,974		31,085,974
Operating Partnership \| Sponsor \| Series D Convertible Units
Related Party Transaction
Units owned (in shares)		4,375,000		4,375,000
Operating Partnership \| Sponsor \| Series E Convertible Units
Related Party Transaction
Units owned (in shares)				4,375,000