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Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2021
Related Party Transaction
Amounts payable to affiliates	$ 4,834	$ 0
American Homes 4 Rent, L.P.
Related Party Transaction
Amounts payable to affiliates	$ 4,834	$ 0
Class A Common Shares/Units
Related Party Transaction
Common stock, shares outstanding (in shares)	316,021,385	337,362,716
Class B common shares
Related Party Transaction
Common stock, shares outstanding (in shares)	635,075	635,075
Affiliates
Related Party Transaction
Percent of shares held	26.30%	24.80%
Amounts payable to affiliates	$ 4,800
Affiliates | American Homes 4 Rent, L.P.
Related Party Transaction
Amounts payable to affiliates	4,800
Due from affiliates	$ 25,700	$ 25,700
Affiliates | Class A Common Shares/Units
Related Party Transaction
Percent of shares held	14.30%	13.50%
Common stock, shares outstanding (in shares)	50,972,165	50,622,165
Affiliates | Class B common shares
Related Party Transaction
Common stock, shares outstanding (in shares)	635,075	635,075
Former Employee
Related Party Transaction
Settlement with related party	$ 2,900

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