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Debt - Schedule of Debt (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) extensionOption | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) extensionOption | Sep. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt | $ 4,578,772 |  | $ 4,578,772 |  |  |  | $ 4,517,158
Unamortized discounts on unsecured senior notes | (33,893) |  | (33,893) |  |  |  | (32,981)
Deferred financing costs, net | (26,066) |  | (26,066) |  |  |  | (22,530)
Total debt per balance sheet | $ 4,518,813 |  | 4,518,813 |  |  |  | 4,461,647
Extension period | 6 months |  |  |  |  |  |
Amortization of financing costs |  |  | 8,966 | $ 9,193 |  |  |
Asset-backed securitizations, unsecured senior notes and term loan facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Amortization of financing costs | $ 1,600 | $ 1,700 | 4,900 | $ 5,200 |  |  |
Secured Debt |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt | $ 928,772 |  | $ 928,772 |  |  |  | 1,877,158
Secured Debt | AMH 2014-SFR2 securitization, net |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.42% |  | 4.42% |  |  |  |
Total debt | $ 0 |  | $ 0 |  |  |  | 461,498
Secured Debt | AMH 2014-SFR3 securitization, net |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.40% |  | 4.40% |  |  |  |
Total debt | $ 0 |  | $ 0 |  |  |  | 477,064
Secured Debt | AMH 2015-SFR1 securitization, net |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.14% |  | 4.14% |  |  |  |
Total debt | $ 496,732 |  | $ 496,732 |  |  |  | 502,299
Potential weighted-average interest rate increase contingent upon repayment |  |  | 3.00% |  |  |  |
Secured Debt | AMH 2015-SFR2 securitization, net |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.36% |  | 4.36% |  |  |  |
Total debt | $ 432,040 |  | $ 432,040 |  |  |  | 436,297
Potential weighted-average interest rate increase contingent upon repayment |  |  | 3.00% |  |  |  |
Senior Notes | 2028 unsecured senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.25% |  | 4.25% |  |  |  |
Effective interest rate | 4.08% |  | 4.08% |  |  |  |
Total debt | $ 500,000 |  | $ 500,000 |  |  |  | 500,000
Senior Notes | 2029 unsecured senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.90% |  | 4.90% |  |  |  |
Total debt | $ 400,000 |  | $ 400,000 |  |  |  | 400,000
Senior Notes | 2031 unsecured senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 2.38% |  | 2.38% |  |  |  |
Effective interest rate | 2.46% |  | 2.46% |  |  |  |
Total debt | $ 450,000 |  | $ 450,000 |  |  |  | 450,000
Senior Notes | 2032 unsecured senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.63% |  | 3.63% |  |  |  |
Total debt | $ 600,000 |  | $ 600,000 |  |  |  | 600,000
Senior Notes | 2034 unsecured senior notes I |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 5.50% |  | 5.50% |  |  | 5.50% |
Total debt | $ 600,000 |  | $ 600,000 |  |  |  | 0
Deferred financing costs, net |  |  |  |  |  | $ (1,300) |
Senior Notes | 2034 unsecured senior notes II |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 5.50% |  | 5.50% |  | 5.50% |  |
Total debt | $ 500,000 |  | $ 500,000 |  |  |  | 0
Deferred financing costs, net |  |  |  |  | $ (1,100) |  |
Senior Notes | 2051 unsecured senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 3.38% |  | 3.38% |  |  |  |
Total debt | $ 300,000 |  | $ 300,000 |  |  |  | 300,000
Senior Notes | 2052 unsecured senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.30% |  | 4.30% |  |  |  |
Total debt | $ 300,000 |  | $ 300,000 |  |  |  | 300,000
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 5.91% |  | 5.91% |  |  |  |
Total debt | $ 0 |  | $ 0 |  |  |  | 90,000
Maximum borrowing capacity | $ 1,250,000 |  | $ 1,250,000 |  |  |  |
Number of extension options | extensionOption | 2 |  | 2 |  |  |  |
Extension period |  |  | 6 months |  |  |  |
Outstanding letters of credit | $ 2,300 |  | $ 2,300 |  |  |  | $ 2,700
Line of Credit | Revolving Credit Facility | Variable Rate Component One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 0.10% |  |  |  |
Line of Credit | Revolving Credit Facility | Variable Rate Component Two |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 0.85% |  |  |  |

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