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Fair Value - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Loss on settlement of cash flow hedging instrument |  |  | $ 0 | $ 3,999 | $ 0
Designated as Hedging Instrument | Treasury Lock |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Derivative, notional amount |  | $ 400,000 |  |  |
Derivative, term of contract |  | 10 years |  |  |
Loss on settlement of cash flow hedging instrument | $ 4,000 |  |  |  |
Carrying Value |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Revolving credit facility |  |  | 130,000 | 350,000 |
Total debt |  |  | 4,515,998 | 3,880,478 |
Carrying Value | Asset-Backed Securities |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 1,890,842 | 1,908,346 |
Carrying Value | AMH 2014-SFR2 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 465,864 | 470,039 |
Carrying Value | AMH 2014-SFR3 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 480,467 | 485,005 |
Carrying Value | AMH 2015-SFR1 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 505,738 | 510,585 |
Carrying Value | AMH 2015-SFR2 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 438,773 | 442,717 |
Carrying Value | Unsecured Senior Notes |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 2,495,156 | 1,622,132 |
Carrying Value | 2028 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 495,956 | 495,166 |
Carrying Value | 2029 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 396,543 | 395,990 |
Carrying Value | 2031 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 441,133 | 440,095 |
Carrying Value | 2032 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 581,533 | 0 |
Carrying Value | 2051 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 291,189 | 290,881 |
Carrying Value | 2052 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 288,802 | 0 |
Fair Value |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Revolving credit facility |  |  | 130,000 | 350,000 |
Total debt |  |  | 4,140,351 | 4,068,175 |
Fair Value | Asset-Backed Securities |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 1,905,542 | 1,952,026 |
Fair Value | AMH 2014-SFR2 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 469,192 | 479,464 |
Fair Value | AMH 2014-SFR3 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 484,350 | 495,659 |
Fair Value | AMH 2015-SFR1 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 509,714 | 521,639 |
Fair Value | AMH 2015-SFR2 securitization |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 442,286 | 455,264 |
Fair Value | Unsecured Senior Notes |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 2,104,809 | 1,766,149 |
Fair Value | 2028 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 463,920 | 554,895 |
Fair Value | 2029 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 377,680 | 463,840 |
Fair Value | 2031 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 347,243 | 442,953 |
Fair Value | 2032 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 504,294 | 0 |
Fair Value | 2051 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | 189,750 | 304,461 |
Fair Value | 2052 unsecured senior notes, net |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total asset-backed securitizations and unsecured senior notes, net |  |  | $ 221,922 | $ 0 |

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