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Net Income Loss On Properties

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The number of units issued during the period pursuant to acquisitions.

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Property Operating Expenses

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Reduction To Additional Paid In Capital

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Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Value of property contributed in noncash investing and financing activities.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Contributions by AH LLC (Details 2) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended			10 Months Ended	0 Months Ended		18 Months Ended	2 Months Ended
Contributions by AH LLC (Details 2) (USD $)	Feb. 28, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 12, 2014	Jun. 11, 2013	Dec. 31, 2012 property	Feb. 28, 2013 property
Significant Acquisitions and Disposals
Single family properties		$ 5,710,671,000us-gaap_RealEstateInvestmentPropertyNet				$ 3,861,422,000us-gaap_RealEstateInvestmentPropertyNet				$ 5,710,671,000us-gaap_RealEstateInvestmentPropertyNet	$ 3,861,422,000us-gaap_RealEstateInvestmentPropertyNet		$ 3,861,422,000us-gaap_RealEstateInvestmentPropertyNet
Other liabilities	(2,500,000)us-gaap_OtherLiabilities																(2,500,000)us-gaap_OtherLiabilities
Rents from single-family properties		109,543,000	104,210,000	88,871,000	73,761,000	61,843,000	47,364,000	17,020,000	6,495,000	376,385,000	132,722,000	4,540,000
Allocated general and administrative expenses										(21,947,000)us-gaap_GeneralAndAdministrativeExpense	(8,845,000)us-gaap_GeneralAndAdministrativeExpense	(7,199,000)us-gaap_GeneralAndAdministrativeExpense
Units issue to Sponsor, value											500,000
Units issue to Sponsor, value										1,546,000	35,817,000	369,371,000
Costs of improvements						13,800,000us-gaap_BuildingsAndImprovementsGross					13,800,000us-gaap_BuildingsAndImprovementsGross		13,800,000us-gaap_BuildingsAndImprovementsGross
Total reduction to additional paid-in capital											356,400,000amh_ReductionToAdditionalPaidInCapital
Credit associated to properties acquired											19,600,000
Excess of par value associated with issuance of the shares											8,000,000
Par value of common shares											6,000amh_ChangeInParValueOfCommonStockValue
Change In Par Value Of Common Stock Value											6,000amh_ChangeInParValueOfCommonStockValue
Decrease In Advisory Fee	9,800,000amh_DecreaseInAdvisoryFee
Value of units issued										11,179,000
Class B common shares
Significant Acquisitions and Disposals
Increase In Common Units Issued													300,000
Series C Convertible Units
Significant Acquisitions and Disposals
Increase In Common Units Issued													13,500,000
Class A Units
Significant Acquisitions and Disposals
Issuance of units (in shares)												32,667
Sponsor
Significant Acquisitions and Disposals
Single family properties														45
Sponsor \| Class B common shares
Significant Acquisitions and Disposals
Units issue to Sponsor, value	7,700,000
Sponsor \| Class A Units
Significant Acquisitions and Disposals
Issuance of units (in shares)														653,378
Common units issue to Sponsor per unit														$ 17.11
Sponsor \| Class A Units
Significant Acquisitions and Disposals
Issuance of units (in shares)														653,378
Common units issue to Sponsor per unit														$ 17.11
Value of units issued														11,200,000
Sponsor \| Operating Partnership
Significant Acquisitions and Disposals
Net book value	386,500,000
Operating Partnership \| Sponsor \| Series C Convertible Units
Significant Acquisitions and Disposals
Units issue to Sponsor, value	378,800,000
Operating Partnership \| Sponsor \| Class A Units
Significant Acquisitions and Disposals
Issuance of units (in shares)															12,395,965
2,770 Property Contribution
Significant Acquisitions and Disposals
Number of properties	2,770
Single family properties	386,500,000																386,500,000
Other assets	5,117,000																5,117,000
Other liabilities	(7,625,000)																(7,625,000)
Net assets contributed	383,992,000																383,992,000
Rents from single-family properties	8,133,000
Property operating expenses	(5,246,000)
Depreciation	(3,345,000)
Allocated general and administrative expenses	(7,989,000)
Net loss	(8,447,000)
Contributed net assets and net loss	392,439,000
2,770 Property Contribution \| Period from June 23, 2011, to December 31, 2012
Significant Acquisitions and Disposals
Number of properties																2,661
Single family properties												365,937,000				365,937,000
Other assets												7,203,000				7,203,000
Other liabilities												(8,183,000)				(8,183,000)
Net assets contributed												364,957,000				364,957,000
Rents from single-family properties																4,413,000
Property operating expenses																(3,326,000)
Depreciation																(2,021,000)
Allocated general and administrative expenses																(6,996,000)
Net loss																(7,930,000)
Contributed net assets and net loss																372,887,000
2,770 Property Contribution \| Period from January 1, 2013, to February 28, 2013
Significant Acquisitions and Disposals
Number of properties																	109
Single family properties	20,563,000																20,563,000
Other assets	(2,086,000)																(2,086,000)
Other liabilities	558,000																558,000
Net assets contributed	19,035,000																19,035,000
Rents from single-family properties																	3,720,000
Property operating expenses																	(1,920,000)
Depreciation																	(1,324,000)
Allocated general and administrative expenses																	(993,000)
Net loss																	(517,000)
Contributed net assets and net loss																	19,552,000
2,770 Property Contribution \| Sponsor \| Class B common shares
Significant Acquisitions and Disposals
Units issue to Sponsor, value	7,700,000
2,770 Property Contribution \| Sponsor \| Operating Partnership
Significant Acquisitions and Disposals
Number of properties	2,770
Net book value	386,500,000
2,770 Property Contribution \| Operating Partnership \| Sponsor \| Series C Convertible Units
Significant Acquisitions and Disposals
Units issue to Sponsor, value	$ 378,800,000
Issuance of units (in shares)	31,085,974
Common units issue to Sponsor per unit	$ 15.50