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Debt - Schedule of Debt (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
USD ($)
extensionOption
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]      
Total debt $ 4,989,015   $ 5,075,391
Unamortized discounts on unsecured senior notes (34,668)   (35,594)
Deferred financing costs, net (27,645)   (29,035)
Total debt per balance sheet 4,926,702   5,010,762
Amortization of financing costs 2,485 $ 3,056  
Asset-backed securitizations, unsecured senior notes and term loan facility      
Debt Instrument [Line Items]      
Amortization of financing costs 1,300 $ 1,700  
Secured Debt      
Debt Instrument [Line Items]      
Total debt $ 429,015   925,391
Secured Debt | AMH 2015-SFR1 securitization, net      
Debt Instrument [Line Items]      
Interest rate 4.14%    
Total debt $ 0   494,868
Secured Debt | AMH 2015-SFR2 securitization, net      
Debt Instrument [Line Items]      
Interest rate 4.36%    
Total debt $ 429,015   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%    
Effective interest rate 4.08%    
Total debt $ 500,000   500,000
Senior Notes | 2029 unsecured senior notes      
Debt Instrument [Line Items]      
Interest rate 4.90%    
Total debt $ 400,000   400,000
Senior Notes | 2031 unsecured senior notes      
Debt Instrument [Line Items]      
Interest rate 2.38%    
Effective interest rate 2.46%    
Total debt $ 450,000   450,000
Senior Notes | 2032 unsecured senior notes      
Debt Instrument [Line Items]      
Interest rate 3.63%    
Total debt $ 600,000   600,000
Senior Notes | 2034 unsecured senior notes I      
Debt Instrument [Line Items]      
Interest rate 5.50%    
Total debt $ 600,000   600,000
Senior Notes | 2034 unsecured senior notes II      
Debt Instrument [Line Items]      
Interest rate 5.50%    
Total debt $ 500,000   500,000
Senior Notes | 2035 unsecured senior notes, net      
Debt Instrument [Line Items]      
Interest rate 5.25%    
Effective interest rate 5.08%    
Total debt $ 500,000   500,000
Senior Notes | 2051 unsecured senior notes      
Debt Instrument [Line Items]      
Interest rate 3.38%    
Total debt $ 300,000   300,000
Senior Notes | 2052 unsecured senior notes      
Debt Instrument [Line Items]      
Interest rate 4.30%    
Total debt $ 300,000   300,000
Line of Credit | Revolving Credit Facility      
Debt Instrument [Line Items]      
Interest rate 5.36%    
Total debt $ 410,000   0
Maximum borrowing capacity $ 1,250,000    
Number of extension options | extensionOption 2    
Extension period 6 months    
Outstanding letters of credit $ 1,500   $ 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%