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Debt - Schedule of Debt (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
extensionOption
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]          
Total debt $ 5,227,529   $ 5,227,529   $ 5,075,391
Unamortized discounts on unsecured senior notes (37,263)   (37,263)   (35,594)
Deferred financing costs, net (31,657)   (31,657)   (29,035)
Total debt per balance sheet 5,158,609   5,158,609   5,010,762
Amortization of financing costs     4,948 $ 5,960  
Asset-backed securitizations, unsecured senior notes and term loan facility          
Debt Instrument [Line Items]          
Amortization of financing costs 1,300 $ 1,600 2,600 $ 3,300  
Secured Debt          
Debt Instrument [Line Items]          
Total debt $ 427,529   $ 427,529   925,391
Secured Debt | AMH 2015-SFR1 securitization, net          
Debt Instrument [Line Items]          
Interest rate 4.14%   4.14%    
Total debt $ 0   $ 0   494,868
Secured Debt | AMH 2015-SFR2 securitization, net          
Debt Instrument [Line Items]          
Interest rate 4.36%   4.36%    
Total debt $ 427,529   $ 427,529   430,523
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 | 2030 unsecured senior notes, net          
Debt Instrument [Line Items]          
Interest rate 4.95%   4.95%    
Total debt $ 650,000   $ 650,000   0
Deferred financing costs, net $ (1,300)   $ (1,300)    
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%    
Total debt $ 600,000   $ 600,000   600,000
Senior Notes | 2034 unsecured senior notes II          
Debt Instrument [Line Items]          
Interest rate 5.50%   5.50%    
Total debt $ 500,000   $ 500,000   500,000
Senior Notes | 2035 unsecured senior notes, net          
Debt Instrument [Line Items]          
Interest rate 5.25%   5.25%    
Effective interest rate 5.08%   5.08%    
Total debt $ 500,000   $ 500,000   500,000
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 5.40%   5.40%    
Total debt $ 0   $ 0   0
Maximum borrowing capacity 1,250,000   $ 1,250,000    
Number of extension options | extensionOption     2    
Extension period     6 months    
Outstanding letters of credit $ 1,600   $ 1,600   $ 2,000
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%