XML 97 R80.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies (Details 2) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) single_family_property | Dec. 31, 2017 USD ($) single_family_property | Dec. 31, 2016 USD ($)
Commitments and contingencies |  |  |
Number of real estate properties held-for-sale in escrow | single_family_property | 78 | 69 |
Expected proceeds from sale of property held-for-sale | $ 13.6 | $ 7.0 |
Company contributions | 1.3 | 0.9 | $ 0.7
Silver Bay Realty Trust Corp. |  |  |
Commitments and contingencies |  |  |
Gain on sale of equity instruments |  | 3.0 |
Single Family |  |  |
Commitments and contingencies |  |  |
Third party development agreements and land | 25.3 | 128.1 |
Land |  |  |
Commitments and contingencies |  |  |
Third party development agreements and land | $ 58.1 | $ 24.0 |
Commitment to acquire properties |  |  |
Commitments and contingencies |  |  |
Number of properties | single_family_property | 88 | 520 |

X
- Definition Expected Proceeds from Sale of Property Held-for-sale + References No definition available. + Details
Name: | amh_ExpectedProceedsfromSaleofPropertyHeldforsale
Namespace Prefix: | amh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of Real Estate Properties Held-for-Sale in Escrow + References No definition available. + Details
Name: | amh_NumberofRealEstatePropertiesHeldforSaleinEscrow
Namespace Prefix: | amh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84241550&loc=SL75117546-209714 + Details
Name: | us-gaap_EquitySecuritiesFvNiRealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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_PurchaseCommitmentExcludingLongtermCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=amh_SilverBayRealtyTrustCorp.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=srt_SingleFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=amh_CommitmentToAcquirePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |