Debt - Narrative (Details)	3 Months Ended													12 Months Ended
	Dec. 31, 2024 USD ($) singleFamilyProperty	Sep. 30, 2024 USD ($) home extensionOption	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($) home	Jun. 30, 2023 debtInstrumentExtensionOption	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2015 USD ($) singleFamilyProperty	Mar. 31, 2015 USD ($) singleFamilyProperty	Dec. 31, 2014 USD ($) singleFamilyProperty	Sep. 30, 2014 USD ($) singleFamilyProperty	Dec. 31, 2024 USD ($) singleFamilyProperty debtInstrumentExtensionOption	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)
Debt Instrument [Line Items]
Percent of principal payment	0.083%													0.083%
Loss on early extinguishment of debt														$ (6,323,000)	$ 0	$ 0
Certificates purchased														952,191,000	24,470,000	22,583,000
Asset-backed securitization certificates	$ 0													0	25,666,000
Proceeds from unsecured senior notes, net of discount														1,594,052,000	0	$ 876,813,000
Offering costs	$ 29,035,000													$ 29,035,000	$ 22,530,000
Extension period		6 months
2032 unsecured senior notes, net
Debt Instrument [Line Items]
Redeemable percentage of debt						100.00%
2034 unsecured senior notes I
Debt Instrument [Line Items]
Redeemable percentage of debt				100.00%
2052 unsecured senior notes, net
Debt Instrument [Line Items]
Redeemable percentage of debt						100.00%
2034 unsecured senior notes II
Debt Instrument [Line Items]
Redeemable percentage of debt			100.00%
2035 unsecured senior notes, net
Debt Instrument [Line Items]
Redeemable percentage of debt	100.00%
Secured Debt
Debt Instrument [Line Items]
Minimum coverage ratio														1.20
Secured Debt | AMH 2014-SFR2 securitization, net
Debt Instrument [Line Items]
Outstanding principal paid				$ 460,600,000
Loss on early extinguishment of debt				1,000,000
Interest rate	4.42%													4.42%
Secured Debt | AMH 2014-SFR3 securitization, net
Debt Instrument [Line Items]
Outstanding principal paid		$ 471,800,000
Loss on early extinguishment of debt		(500,000)
Interest rate	4.40%													4.40%
Senior Notes | 2028 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount									$ 500,000,000.0
Interest rate	4.25%								4.25%					4.25%
Proceeds from unsecured senior notes, net of discount									$ 494,000,000.0
Underwriting fees									3,200,000
Unamortized discount									2,800,000
Offering costs									$ 1,900,000
Redeemable percentage of debt									100.00%
Effective interest rate	4.08%								4.08%					4.08%
Senior Notes | 2029 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount								$ 400,000,000.0
Interest rate	4.90%							4.90%						4.90%
Proceeds from unsecured senior notes, net of discount								$ 395,300,000
Underwriting fees								2,600,000
Unamortized discount								2,100,000
Offering costs								$ 1,000,000.0
Redeemable percentage of debt								100.00%
Senior Notes | 2031 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount							$ 450,000,000.0
Interest rate	2.38%						2.375%							2.38%
Redeemable percentage of debt							100.00%
Effective interest rate	2.46%						2.46%							2.46%
Senior Notes | 2051 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount							$ 300,000,000.0
Interest rate	3.38%						3.375%							3.38%
Redeemable percentage of debt							100.00%
Senior Notes | Senior Unsecured Notes
Debt Instrument [Line Items]
Proceeds from unsecured senior notes, net of discount						$ 870,300,000	$ 731,600,000
Underwriting fees						6,500,000	5,600,000
Unamortized discount						23,200,000	12,800,000
Offering costs						1,700,000	$ 1,400,000
Senior Notes | 2032 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount						$ 600,000,000.0
Interest rate	3.63%					3.625%								3.63%
Senior Notes | 2034 unsecured senior notes I
Debt Instrument [Line Items]
Debt instrument, face amount				$ 600,000,000
Interest rate	5.50%			5.50%										5.50%
Proceeds from unsecured senior notes, net of discount				$ 595,500,000
Underwriting fees				3,900,000
Unamortized discount				600,000
Offering costs				$ 1,300,000
Senior Notes | 2052 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount						$ 300,000,000.0
Interest rate	4.30%					4.30%								4.30%
Senior Notes | 2034 unsecured senior notes II
Debt Instrument [Line Items]
Debt instrument, face amount			$ 500,000,000.0
Interest rate	5.50%		5.50%											5.50%
Proceeds from unsecured senior notes, net of discount			$ 494,000,000
Underwriting fees			3,300,000
Unamortized discount			2,700,000
Offering costs			$ 1,100,000
Senior Notes | 2035 unsecured senior notes, net
Debt Instrument [Line Items]
Debt instrument, face amount	$ 500,000,000													$ 500,000,000
Interest rate	5.25%													5.25%
Proceeds from unsecured senior notes, net of discount	$ 494,200,000
Underwriting fees	3,200,000													$ 3,200,000
Unamortized discount	2,600,000													2,600,000
Offering costs	$ 1,100,000													$ 1,100,000
Effective interest rate	5.08%													5.08%
Line of Credit | Credit facility
Debt Instrument [Line Items]
Loss on early extinguishment of debt		(4,800,000)
Interest rate	5.44%													5.44%
Credit facility maximum borrowing capacity	$ 1,250,000,000	$ 1,250,000,000												$ 1,250,000,000			$ 1,250,000,000
Number of debt instrument extension options		2			2									2
Extension period					6 months									6 months
Line of Credit | Credit facility | Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate														0.10%
Line of Credit | Credit facility | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate														0.85%
Line of Credit | Credit facility | Fed Funds Effective Rate Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on base rate					0.50%
Line of Credit | Credit facility | Fed Funds Effective Rate Overnight Index Swap Rate | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Line of Credit | Credit facility | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate					0.10%
Debt instrument, basis spread on base rate					1.10%
Line of Credit | Credit facility | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate		0.10%
Line of Credit | Credit facility | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate		1.10%
Line of Credit | Credit facility | Minimum
Debt Instrument [Line Items]
Facility fee percentage	0.125%				0.125%
Line of Credit | Credit facility | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					0.00%
Line of Credit | Credit facility | Minimum | Base Rate | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate		0.00%
Line of Credit | Credit facility | Minimum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate					0.725%
Line of Credit | Credit facility | Minimum | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate		72.50%
Line of Credit | Credit facility | Maximum
Debt Instrument [Line Items]
Facility fee percentage	0.30%				0.30%
Line of Credit | Credit facility | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					0.45%
Line of Credit | Credit facility | Maximum | Base Rate | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate		40.00%
Line of Credit | Credit facility | Maximum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate					1.45%
Line of Credit | Credit facility | Maximum | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate		1.40%
Single Family Homes
Debt Instrument [Line Items]
Number of Properties | singleFamilyProperty	61,336													61,336
Single Family Homes | Secured Debt | AMH 2014-SFR2 securitization, net
Debt Instrument [Line Items]
Number of collateralized homes released | home				4,516
Restricted cash released				$ 10,300,000
Proceeds from asset-backed securitization certificates in investment payoff				$ 25,700,000
Single Family Homes | Secured Debt | AMH 2014-SFR3 securitization, net
Debt Instrument [Line Items]
Number of collateralized homes released | home		4,541
Restricted cash released		$ 10,900,000
Single Family Homes | AMH 2014-SFR2 securitization, net | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount													$ 513,300,000
Debt instrument term													10 years
Weighted-average interest rate													4.42%
Number of Properties | singleFamilyProperty													4,487
Interest rate													0.00%
Certificates purchased													$ 25,700,000
Asset-backed securitization certificates													25,700,000
Proceeds from asset-backed securitizations													487,700,000
Asset-backed securitizations, issuance costs													$ 12,900,000
Single Family Homes | AMH 2014-SFR3 securitization, net | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount												$ 528,400,000
Debt instrument term												10 years
Weighted-average interest rate												4.40%
Number of Properties | singleFamilyProperty												4,503
Proceeds from asset-backed securitizations												$ 528,400,000
Asset-backed securitizations, issuance costs												$ 12,900,000
Single Family Homes | AMH 2015-SFR1 securitization, net | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount											$ 552,800,000
Debt instrument term											30 years
Weighted-average interest rate											4.14%
Number of Properties | singleFamilyProperty											4,661
Proceeds from asset-backed securitizations											$ 552,800,000
Asset-backed securitizations, issuance costs											$ 13,300,000
Single Family Homes | AMH 2015-SFR2 securitization, net | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount										$ 477,700,000
Debt instrument term										30 years
Weighted-average interest rate										4.36%
Number of Properties | singleFamilyProperty										4,125
Proceeds from asset-backed securitizations										$ 477,700,000
Asset-backed securitizations, issuance costs										$ 11,300,000