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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%