XML 70 R54.htm IDEA: XBRL DOCUMENT v3.3.1.900

Shareholders' Equity (Details 2)								1 Months Ended				12 Months Ended
	Dec. 12, 2014 single_family_property property $ / shares	Jun. 14, 2013 shares	Feb. 28, 2013 single_family_property	Feb. 28, 2013	Feb. 28, 2013 $ / shares	Feb. 28, 2013 property	Dec. 31, 2012 shares	May. 31, 2014 USD ($) shares	Jan. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) $ / shares shares	Oct. 31, 2013	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) nonperforming_loan $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) market $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Jun. 10, 2013 shares
Class of Stock
Gross proceeds from issuance of Preferred shares before offering costs | $																$ 0		$ 189,433,000	$ 212,596,000
Noncontrolling interest | $																$ 14,353,000		$ 14,965,000	13,245,000
Period of non-participation in distributions												30 months
Aggregate purchase price of shares | $																			$ 0
2,770 Property Contribution
Class of Stock
Number of properties contributed to the Operating Partnership			2,770			2,770
Scenario Two, Two Consecutive Quarters
Class of Stock
Units distribution percentage														70.00%
Series A Preferred Stock
Class of Stock
Cumulative annual cash dividend rate											5.00%			5.00%				5.00%	5.00%
Preferred units issued (in shares)										5,060,000									5,060,000
Gross proceeds from issuance of Preferred shares before offering costs | $																			$ 126,500,000
Offering costs | $										$ 7,300,000								$ 7,300,000	$ 7,300,000
Dividend payable per share (in dollars per share) | $ / shares										$ 0.229167		$ 1.25	$ 1.25	$ 1.25	$ 1.25	$ 1.25	$ 1.25	$ 1.25	$ 0.229167
Series B Preferred Stock
Class of Stock
Cumulative annual cash dividend rate									5.00%	5.00%				5.00%				5.00%	5.00%
Preferred units issued (in shares)									4,400,000	4,400,000									4,400,000
Gross proceeds from issuance of Preferred shares before offering costs | $									$ 110,000,000	$ 110,000,000
Offering costs | $									$ 6,600,000	$ 6,600,000								$ 6,600,000	$ 6,600,000
Dividend payable per share (in dollars per share) | $ / shares												1.25	1.25	$ 1.25	1.25	1.25	1.25	$ 1.2875
Series C Preferred Stock
Class of Stock
Cumulative annual cash dividend rate								5.50%						5.50%				5.50%	5.50%
Preferred units issued (in shares)								7,600,000		7,600,000									7,600,000
Gross proceeds from issuance of Preferred shares before offering costs | $								$ 190,000,000											$ 190,000,000
Offering costs | $								$ 9,700,000		$ 9,700,000								$ 9,700,000	$ 9,700,000
Dividend payable per share (in dollars per share) | $ / shares												1.375	1.375	$ 1.375	1.375	1.375	1.375	$ 0.912847
3.5% Convertible Perpetual Preferred Units
Class of Stock
Preferred Units converted into Class A units (in shares)		653,492
Class A common shares
Class of Stock
Dividend payable per share (in dollars per share) | $ / shares										$ 0.05		0.20	0.20	0.20	0.20	0.20	0.20	0.20	$ 0.05
Class A common shares | Subscription Agreement
Class of Stock
Issuance of common shares (in shares)																			434,783
Purchase price per share (in dollars per share) | $ / shares										17.25									$ 17.25
Class A common shares | Option to purchase | Subscription Agreement
Class of Stock
Issuance of common shares (in shares)																			3,333,334
Aggregate purchase price of shares | $																			$ 50,000,000
Purchase price per share (in dollars per share) | $ / shares										15									$ 15
Class B common shares
Class of Stock
Preferred units issued (in shares)		653,492					653,492
Dividend payable per share (in dollars per share) | $ / shares										$ 0.05		0.2	0.2	$ 0.2	0.2	0.2	0.2	$ 0.20	$ 0.05
Preferred shares
Class of Stock
Cumulative annual cash dividend rate														5.00%
Liquidation preference per share (in dollars per share) | $ / shares												$ 25	$ 25	$ 25	$ 25	$ 25	$ 25
Preferred stock, cumulative change in value of index based on purchase prices of single-family properties (as a percent)														50.00%
Number of single-family properties located in top markets													20				20
Preferred stock, maximum internal rate of return considering initial liquidation liquidation preference (as a percent)														9.00%
Increase in cumulative annual cash dividend rate														10.00%
Liquidation preference (as a percent)														50.00%
Initial liquidation preference | $												$ 457,600,000	$ 457,600,000	$ 457,600,000	$ 457,600,000	$ 457,600,000	$ 457,600,000
AH LLC
Class of Stock
Percentage of units outstanding												22.10%	22.10%	22.10%	22.10%	22.10%	22.10%	21.80%
Number of properties contributed to the Operating Partnership | property	45
AH LLC | 3.5% Convertible Perpetual Preferred Units
Class of Stock
Cumulative annual cash dividend rate							3.50%
Preferred units issued (in shares)										653,492									653,492
Preferred Units converted into Class A units (in shares)		653,492
AH LLC | Class A common shares
Class of Stock
Percentage of units outstanding												3.30%	3.30%	3.30%	3.30%	3.30%	3.30%	3.30%
Class A Units | AH LLC
Class of Stock
Number of properties contributed to the Operating Partnership | single_family_property	45
Units owned (in shares)												14,440,670	14,440,670	14,440,670	14,440,670	14,440,670	14,440,670	14,440,670
Closing price per share (in dollars per share) | $ / shares	$ 17.11
Series C Convertible Units
Class of Stock
Dividend payable per share (in dollars per share) | $ / shares										$ 0.15		$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.15
Series C Convertible Units | AH LLC
Class of Stock
Units owned (in shares)												31,085,974	31,085,974	31,085,974	31,085,974	31,085,974	31,085,974	31,085,974
Series D Convertible Units | AH LLC
Class of Stock
Units owned (in shares)												4,375,000	4,375,000	4,375,000	4,375,000	4,375,000	4,375,000	4,375,000
Series E Convertible Units | AH LLC
Class of Stock
Units owned (in shares)												4,375,000	4,375,000	4,375,000	4,375,000	4,375,000	4,375,000	4,375,000
Operating Partnership | AH LLC | 3.5% Convertible Perpetual Preferred Units
Class of Stock
Annual distribution (in dollars per share) | $ / shares																			$ 0.53
Operating Partnership | Class A Units
Class of Stock
Stock exchange ratio														1
Percentage of units outstanding												93.50%	93.50%	93.50%	93.50%	93.50%	93.50%	93.60%
Units outstanding (in shares)												222,311,255	222,311,255	222,311,255	222,311,255	222,311,255	222,311,255	225,914,576
Operating Partnership | Class A Units | AH LLC
Class of Stock
Percentage of units outstanding												6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.40%
Units owned (in shares)												14,440,670	14,440,670	14,440,670	14,440,670	14,440,670	14,440,670
Operating Partnership | Series C Convertible Units
Class of Stock
Maximum percentage of property contribution per unit				3.90%
Percentage of scheduled rents				98.00%
Common stock per unit (in dollars per share) | $ / shares					$ 15.50
Net income (loss) attributable to noncontrolling interest | $																$ 18,800,000		$ 18,600,000	$ 14,900,000
Operating Partnership | Series C Convertible Units | AH LLC
Class of Stock
Units owned (in shares)												31,085,974	31,085,974	31,085,974	31,085,974	31,085,974	31,085,974	31,085,974
Operating Partnership | Series D Convertible Units
Class of Stock
Stock exchange ratio														1
Closing price per share (in dollars per share) | $ / shares															$ 18.00
Operating Partnership | Series D Convertible Units | Scenario One, Over Four Consecutive Quarters
Class of Stock
Adjusted funds from operations per common share (in dollars per share) | $ / shares															$ 0.80
Operating Partnership | Series D Convertible Units | AH LLC
Class of Stock
Units owned (in shares)												4,375,000	4,375,000	4,375,000	4,375,000	4,375,000	4,375,000	4,375,000
Operating Partnership | Series E Convertible Units
Class of Stock
Units owned (in shares)																		4,375,000
Stock split conversion ratio														1
Annualized EBITDA Contribution | $																$ 14,000,000
Operating Partnership | Series E Convertible Units | Scenario Three, Measurement Period
Class of Stock
EBITDA contribution | $																28,000,000
Operating Partnership | Series E Convertible Units | AH LLC
Class of Stock
Units owned (in shares)																		4,375,000		4,375,000
Certain consolidated subsidiaries with noncontrolling interest
Class of Stock
Net income (loss) attributable to noncontrolling interest | $																(100,000)		$ (300,000)	(100,000)
Certain consolidated subsidiaries with noncontrolling interest | Preferred Units
Class of Stock
Net income (loss) attributable to noncontrolling interest | $																0		0	200,000
Certain consolidated subsidiaries with noncontrolling interest | Class A Units
Class of Stock
Net income (loss) attributable to noncontrolling interest | $																$ (4,300,000)		$ (3,400,000)	$ (1,800,000)

X

- Definition

Adjusted Funds from Operations per Common Share

+ References

No definition available.

+ Details

Name:	amh_AdjustedFundsFromOperationsPerCommonShare
Namespace Prefix:	amh_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Annualized Earnings Before Interest Tax Depreciation and Amortization Contribution

+ References

No definition available.

+ Details

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

X

- Definition

Common Stock Per Unit

+ References

No definition available.

+ Details

Name:	amh_CommonStockPerUnit
Namespace Prefix:	amh_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of properties contributed to the Operating Partnership.

+ References

No definition available.

+ Details

Name:	amh_ContributionOfPropertyNumberOfProperties
Namespace Prefix:	amh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Conversion Of Preferred Units.

+ References

No definition available.

+ Details

Name:	amh_ConversionOfPreferredUnits
Namespace Prefix:	amh_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBITDA Contribution

+ References

No definition available.

+ Details

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

X

- Definition

Increased Preferred Dividend Rate.

+ References

No definition available.

+ Details

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

X

- Definition

Maximum Internal Rate of Return, When Preferred Stock Liquidation Preference Considered.

+ References

No definition available.

+ Details

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

X

- 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

X

- Definition

Represents the number of single-family properties located in top markets.

+ References

No definition available.

+ Details

Name:	amh_NumberOfSingleFamilyPropertiesLocatedInTopMarkets
Namespace Prefix:	amh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Other Ownership Interests, Period of Non-participation in Distributions

+ References

No definition available.

+ Details

Name:	amh_OtherOwnershipInterestsPeriodofNonparticipationinDistributions
Namespace Prefix:	amh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage Of Property Contribution Per Unit To Maximum

+ References

No definition available.

+ Details

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

X

- Definition

Percentage Of Property Lease To Scheduled Rents

+ References

No definition available.

+ Details

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

X

- Definition

Preferred Distributions Percentage

+ References

No definition available.

+ Details

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

X

- Definition

Preferred Stock, Cumulative Change In Value Of Index Based On Purchase Prices.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the percentage of the difference between preference in liquidation and the par or stated values of the preferred shares.

+ References

No definition available.

+ Details

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

X

- Definition

Common Stock Per Unit.

+ References

No definition available.

+ Details

Name:	amh_PurchasePricePerUnit
Namespace Prefix:	amh_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The ratio applied to the equity instrument to exchange it for common stock of the reporting entity.

+ References

No definition available.

+ Details

Name:	amh_StockExchangeRatio
Namespace Prefix:	amh_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_CapitalUnitLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of Income (Loss) attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.19)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

X

- 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

X

- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

+ Details

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

X

- Definition

The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04.16(b))
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04.16(a))
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

+ Details

Name:	us-gaap_PartnersCapitalAccountUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount per share used to calculated dividend payments on preferred stock.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendRatePerDollarAmount
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: 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.(d)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

+ Details

Name:	us-gaap_PreferredStockLiquidationPreference
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Value of all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by shareholders, which is net of related treasury stock. May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred shareholders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

+ Details

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

X

- Definition

The number of preferred units issued.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section F

+ Details

Name:	us-gaap_PreferredUnitsIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cumulative amount of offering costs allocated to the preferred partners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

+ Details

Name:	us-gaap_PreferredUnitsOfferingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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

X

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Value of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Stock Split
-URI http://asc.fasb.org/extlink&oid=6525746

+ Details

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=amh_TwoThousandSevenHundredAndSeventyPropertyContributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=amh_ScenarioTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=amh_ThreePointFivePercentageConvertiblePerpetualPreferredUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=amh_SubscriptionAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=amh_ScenarioFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=amh_ClassAUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=amh_SeriesCConvertibleUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=amh_SeriesDConvertibleUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=amh_SeriesEConvertibleUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_StatementScenarioAxis=amh_ScenarioOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=amh_ScenarioThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=amh_PreferredUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: