Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt	$ 4,433,095		$ 4,433,095		$ 4,581,628
Unamortized discounts on unsecured senior notes	(33,759)		(33,759)		(36,099)
Deferred financing costs, net	(24,290)		(24,290)		(29,531)
Total debt per balance sheet	4,375,046		4,375,046		4,515,998
Amortization of financing costs			9,193	$ 8,588
Asset-backed securitizations, unsecured senior notes and term loan facility
Debt Instrument [Line Items]
Amortization of financing costs	1,700	$ 1,800	5,200	$ 5,100
Secured Debt
Debt Instrument [Line Items]
Total debt	$ 1,883,095		$ 1,883,095		1,901,628
Secured Debt | AMH 2014-SFR2 securitization
Debt Instrument [Line Items]
Interest rate	4.42%		4.42%
Total debt	$ 463,199		$ 463,199		468,138
Secured Debt | AMH 2014-SFR3 securitization
Debt Instrument [Line Items]
Interest rate	4.40%		4.40%
Total debt	$ 478,612		$ 478,612		482,964
Secured Debt | AMH 2015-SFR1 securitization
Debt Instrument [Line Items]
Interest rate	4.14%		4.14%
Total debt	$ 503,681		$ 503,681		508,672
Potential weighted-average interest rate increase contingent upon repayment			3.00%
Secured Debt | AMH 2015-SFR2 securitization
Debt Instrument [Line Items]
Interest rate	4.36%		4.36%
Total debt	$ 437,603		$ 437,603		441,854
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 | 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	6.31%		6.31%
Total debt	$ 0		$ 0		130,000
Maximum borrowing capacity	1,250,000		1,250,000
Outstanding letters of credit	$ 2,700		$ 2,700		$ 4,000
Line of Credit | Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate			0.90%