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Commitments and Contingencies (Details) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) single_family_property | Dec. 31, 2016 USD ($) single_family_property
Long-term Purchase Commitment [Line Items] |  |
Single-family properties sales in escrow | single_family_property | 184 | 57
Single-family properties sales in escrow, selling price | $ 17.1 | $ 6.6
Single Family Properties |  |
Long-term Purchase Commitment [Line Items] |  |
Commitment to acquire single-family properties | single_family_property | 511 | 203
Purchase price of commitment to acquire single-family properties | $ 122.6 | $ 41.7
Land |  |
Long-term Purchase Commitment [Line Items] |  |
Purchase price of commitment to acquire single-family properties | $ 13.7 | $ 3.9

X
- Definition Expected Proceeds from Sale of Property Held-for-sale + References No definition available. + Details
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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
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Namespace Prefix: | amh_
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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
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- 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
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- Definition Number of units of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |