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Debt - Narrative (Details) | 3 Months Ended | 12 Months Ended |
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Jun. 30, 2023 debtInstrumentExtensionOption | Jun. 30, 2022 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Sep. 30, 2015 USD ($) singleFamilyProperty | Mar. 31, 2015 USD ($) singleFamilyProperty | Dec. 31, 2014 USD ($) singleFamilyProperty | Sep. 30, 2014 USD ($) singleFamilyProperty | Dec. 31, 2023 USD ($) debtInstrumentExtensionOption singleFamilyProperty | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Mar. 31, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of principal payment |  |  |  |  |  |  |  |  |  |  | 0.083% |  |  |
Certificates purchased |  |  |  |  |  |  |  |  |  |  | $ 24,470,000 | $ 22,583,000 | $ 24,311,000 |
Asset-backed securitization certificates |  |  |  |  |  |  |  |  |  |  | 25,666,000 | 25,666,000 |  |
Proceeds from unsecured senior notes, net of discount |  |  |  |  |  |  |  |  |  |  | 0 | 876,813,000 | $ 737,195,000 |
Offering costs |  |  |  |  |  |  |  |  |  |  | $ 22,530,000 | $ 29,531,000 |  |
2032 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemable percentage of debt |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
2052 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemable percentage of debt |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Single Family Homes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | singleFamilyProperty |  |  |  |  |  |  |  |  |  |  | 59,332 |  |  |
Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum coverage ratio |  |  |  |  |  |  |  |  |  |  | 1.20 |  |  |
Secured Debt | Single Family Homes | AMH 2014-SFR2 securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 513,300,000 |  |  |  |
Debt instrument term |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  |  |  | 4.42% |  |  |  |
Number of properties | singleFamilyProperty |  |  |  |  |  |  |  |  |  | 4,487 |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |
Certificates purchased |  |  |  |  |  |  |  |  |  | $ 25,700,000 |  |  |  |
Asset-backed securitization certificates |  |  |  |  |  |  |  |  |  | 25,700,000 |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  |  |  | 487,700,000 |  |  |  |
Asset-backed securitizations, issuance costs |  |  |  |  |  |  |  |  |  | $ 12,900,000 |  |  |  |
Secured Debt | Single Family Homes | AMH 2014-SFR3 securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 528,400,000 |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  |  | 4.40% |  |  |  |  |
Number of properties | singleFamilyProperty |  |  |  |  |  |  |  |  | 4,503 |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  |  | $ 528,400,000 |  |  |  |  |
Asset-backed securitizations, issuance costs |  |  |  |  |  |  |  |  | $ 12,900,000 |  |  |  |  |
Secured Debt | Single Family Homes | AMH 2015-SFR1 securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 552,800,000 |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  | 30 years |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  |  | 4.14% |  |  |  |  |  |
Number of properties | singleFamilyProperty |  |  |  |  |  |  |  | 4,661 |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  |  | $ 552,800,000 |  |  |  |  |  |
Asset-backed securitizations, issuance costs |  |  |  |  |  |  |  | $ 13,300,000 |  |  |  |  |  |
Secured Debt | Single Family Homes | AMH 2015-SFR2 securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 477,700,000 |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  | 30 years |  |  |  |  |  |  |
Weighted-average interest rate |  |  |  |  |  |  | 4.36% |  |  |  |  |  |  |
Number of properties | singleFamilyProperty |  |  |  |  |  |  | 4,125 |  |  |  |  |  |  |
Proceeds from asset-backed securitizations |  |  |  |  |  |  | $ 477,700,000 |  |  |  |  |  |  |
Asset-backed securitizations, issuance costs |  |  |  |  |  |  | $ 11,300,000 |  |  |  |  |  |  |
Senior Notes | Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from unsecured senior notes, net of discount |  | $ 870,300,000 | $ 731,600,000 |  |  |  |  |  |  |  |  |  |  |
Underwriting fees |  | 6,500,000 | 5,600,000 |  |  |  |  |  |  |  |  |  |  |
Unamortized discount on debt |  | 23,200,000 | 12,800,000 |  |  |  |  |  |  |  |  |  |  |
Offering costs |  | 1,700,000 | 1,400,000 |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 2028 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 4.25% |  |  |  |  | 4.25% |  |  |
Proceeds from unsecured senior notes, net of discount |  |  |  |  |  | $ 494,000,000 |  |  |  |  |  |  |  |
Underwriting fees |  |  |  |  |  | 3,200,000 |  |  |  |  |  |  |  |
Unamortized discount on debt |  |  |  |  |  | 2,800,000 |  |  |  |  |  |  |  |
Offering costs |  |  |  |  |  | $ 1,900,000 |  |  |  |  |  |  |  |
Redeemable percentage of debt |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  | 4.08% |  |  |  |  | 4.08% |  |  |
Senior Notes | 2029 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 4.90% |  |  |  |  |  | 4.90% |  |  |
Proceeds from unsecured senior notes, net of discount |  |  |  |  | $ 395,300,000 |  |  |  |  |  |  |  |  |
Underwriting fees |  |  |  |  | 2,600,000 |  |  |  |  |  |  |  |  |
Unamortized discount on debt |  |  |  |  | 2,100,000 |  |  |  |  |  |  |  |  |
Offering costs |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |
Redeemable percentage of debt |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Senior Notes | 2031 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 450,000,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  | 2.375% |  |  |  |  |  |  |  | 2.38% |  |  |
Redeemable percentage of debt |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Effective interest rate |  |  | 2.46% |  |  |  |  |  |  |  | 2.46% |  |  |
Senior Notes | 2032 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 3.625% |  |  |  |  |  |  |  |  | 3.63% |  |  |
Senior Notes | 2051 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 300,000,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  | 3.375% |  |  |  |  |  |  |  | 3.38% |  |  |
Redeemable percentage of debt |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 2052 unsecured senior notes, net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 4.30% |  |  |  |  |  |  |  |  | 4.30% |  |  |
Line of Credit | Credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 6.38% |  |  |
Credit facility maximum borrowing capacity |  |  |  | $ 1,250,000,000 |  |  |  |  |  |  | $ 1,250,000,000 |  |  | $ 800,000,000
Number of debt instrument extension options | debtInstrumentExtensionOption | 2 |  |  |  |  |  |  |  |  |  | 2 |  |  |
Extension period | 6 months |  |  |  |  |  |  |  |  |  | 6 months |  |  |
Line of Credit | Credit facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on base rate |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Fed Funds Effective Rate Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on base rate | 0.50% |  |  | 0.50% |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.10% |  |  |  |  |  |  |  |  |  | 0.90% |  |  |
Debt instrument, basis spread on base rate | 1.10% |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility fee percentage | 0.125% |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.725% |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Minimum | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.00% |  |  | 0.00% |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Minimum | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.725% |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility fee percentage | 0.30% |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Maximum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.45% |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Maximum | Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.45% |  |  | 0.45% |  |  |  |  |  |  |  |  |  |
Line of Credit | Credit facility | Maximum | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.45% |  |  |  |  |  |  |  |  |  |  |  |  |

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