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Fair Value - Schedule of Carrying Values and Fair Values of Debt Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Carrying Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Revolving credit facility $ 0 $ 90,000
Total debt 4,518,813 4,461,647
Carrying Value | Total asset-backed securitizations, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 927,099 1,871,421
Carrying Value | AMH 2014-SFR2 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 0 460,507
Carrying Value | AMH 2014-SFR3 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 0 475,854
Carrying Value | AMH 2015-SFR1 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 496,159 500,713
Carrying Value | AMH 2015-SFR2 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 430,940 434,347
Carrying Value | Total unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 3,591,714 2,500,226
Carrying Value | 2028 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 497,337 496,745
Carrying Value | 2029 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 397,524 397,107
Carrying Value | 2031 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 442,951 442,172
Carrying Value | 2032 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 585,012 583,521
Carrying Value | 2034 unsecured senior notes I, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 594,529 0
Carrying Value | 2034 unsecured senior notes II, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 493,162 0
Carrying Value | 2051 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 291,729 291,498
Carrying Value | 2052 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 289,470 289,183
Fair Value    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Revolving credit facility 0 90,000
Total debt 4,372,115 4,219,737
Fair Value | Total asset-backed securitizations, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 932,418 1,883,246
Fair Value | AMH 2014-SFR2 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 0 463,237
Fair Value | AMH 2014-SFR3 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 0 478,833
Fair Value | AMH 2015-SFR1 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 498,603 503,668
Fair Value | AMH 2015-SFR2 securitization, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 433,815 437,508
Fair Value | Total unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 3,439,697 2,246,491
Fair Value | 2028 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 495,595 486,875
Fair Value | 2029 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 404,312 396,956
Fair Value | 2031 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 387,122 371,817
Fair Value | 2032 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 554,910 539,304
Fair Value | 2034 unsecured senior notes I, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 620,004 0
Fair Value | 2034 unsecured senior notes II, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 517,470 0
Fair Value | 2051 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net 211,587 207,264
Fair Value | 2052 unsecured senior notes, net    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total asset-backed securitizations and unsecured senior notes, net $ 248,697 $ 244,275