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Debt - Long-term Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 4,581,628,000	$ 3,924,181,000
Unamortized discounts on unsecured senior notes	(36,099,000)	(15,561,000)
Deferred financing costs, net	(29,531,000)	(28,142,000)
Total debt per balance sheet	4,515,998,000	3,880,478,000
Amortization of debt issuance costs	11,673,000	8,790,000	$ 7,431,000
Asset-Backed Securitizations, Unsecured Senior Notes and Term Loan Facility
Debt Instrument [Line Items]
Amortization of debt issuance costs	6,800,000	6,100,000	$ 5,900,000
Secured Debt
Debt Instrument [Line Items]
Total debt	$ 1,901,628,000	1,924,181,000
Secured Debt | AMH 2014-SFR2 securitization
Debt Instrument [Line Items]
Interest rate	4.42%
Total debt	$ 468,138,000	473,594,000
Secured Debt | AMH 2014-SFR3 securitization
Debt Instrument [Line Items]
Interest rate	4.40%
Total debt	$ 482,964,000	488,790,000
Secured Debt | AH4R 2015-SFR1 securitization
Debt Instrument [Line Items]
Interest rate	4.14%
Total debt	$ 508,672,000	514,868,000
Secured Debt | AMH 2015-SFR2 securitization
Debt Instrument [Line Items]
Interest rate	4.36%
Total debt	$ 441,854,000	446,929,000
Exchangeable 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	$ 500,000,000	500,000,000
Deferred financing costs, net									$ (1,900,000)
Exchangeable Senior Notes | 2029 unsecured senior notes
Debt Instrument [Line Items]
Interest rate	4.90%							4.90%
Total debt	$ 400,000,000	400,000,000
Deferred financing costs, net								$ (1,000,000)
Exchangeable Senior Notes | 2031 unsecured senior notes
Debt Instrument [Line Items]
Interest rate	2.38%				2.375%
Effective interest rate	2.46%				2.46%
Total debt	$ 450,000,000	450,000,000
Exchangeable Senior Notes | 2032 unsecured senior notes, net
Debt Instrument [Line Items]
Interest rate	3.63%			3.625%
Total debt	$ 600,000,000	0
Exchangeable Senior Notes | 2051 unsecured senior notes
Debt Instrument [Line Items]
Interest rate	3.38%				3.375%
Total debt	$ 300,000,000	300,000,000
Exchangeable Senior Notes | 2052 unsecured senior notes, net
Debt Instrument [Line Items]
Interest rate	4.30%			4.30%
Total debt	$ 300,000,000	0
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate	5.29%
Total debt	$ 130,000,000	350,000,000
Credit facility maximum borrowing capacity	1,250,000,000					$ 1,250,000,000	$ 800,000,000
Letters of credit outstanding	$ 4,000,000	$ 1,600,000
Line of Credit | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	0.90%

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