Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Subsequent Acquisitions From April 1, 2022 through April 30, 2022, the Company added 352 properties to its portfolio for a total cost of approximately $139.1 million, which included 97 newly constructed properties delivered through our AMH Development Program and two newly constructed homes acquired from third-party developers through our National Builder Program. Subsequent Dispositions From April 1, 2022 through April 30, 2022, the Company disposed of 54 properties for aggregate net proceeds of approximately $17.3 million. Revolving Credit Facility From April 1, 2022 through April 30, 2022, the Company paid down $410.0 million under its revolving credit facility, resulting in no outstanding borrowings under its revolving credit facility as of April 30, 2022. Unsecured Senior Notes In April 2022, the Operating Partnership issued $600.0 million of 3.625% unsecured senior notes with a maturity date of April 15, 2032 (the “2032 Notes”) and $300.0 million of 4.300% unsecured senior notes with a maturity date of April 15, 2052 (the “2052 Notes” and, together with the 2032 Notes, the “Notes”). Interest on the Notes is payable semi-annually in arrears on April 15 and October 15 of each year, commencing on October 15, 2022. The Operating Partnership received aggregate net proceeds of $870.3 million from these issuances, after underwriting fees of approximately $6.5 million and a $23.2 million discount, and before estimated offering costs of $1.6 million. The Operating Partnership used net proceeds from this offering to repay amounts outstanding on its revolving credit facility and in connection with the redemption of its Series F preferred shares and intends to use the remaining net proceeds for general corporate purposes, including, without limitation, property acquisitions and developments, the expansion, redevelopment and/or improvement of existing properties in the Operating Partnership’s portfolio, other capital expenditures, the redemption of its other preferred shares, the repayment of outstanding indebtedness, working capital and other general purposes. The Notes are the Operating Partnership’s unsecured and unsubordinated obligations and rank equally in right of payment with all of the Operating Partnership’s existing and future unsecured and unsubordinated indebtedness. The indentures require that we maintain certain financial covenants. The Operating Partnership may redeem the Notes in whole at any time or in part from time to time at the applicable redemption price specified in the indentures with respect to the Notes. If the 2032 Notes are redeemed on or after January 15, 2032 (three months prior to the maturity date), the redemption price will be equal to 100% of the principal amount of the notes being redeemed plus accrued and unpaid interest thereon to, but not including, the redemption date. If the 2052 Notes are redeemed on or after October 15, 2051 (six months prior to the maturity date), the redemption price will be equal to 100% of the principal amount of the notes being redeemed plus accrued and unpaid interest thereon to, but not including, the redemption date. Redemption of Perpetual Preferred Shares On May 5, 2022, the Company redeemed all 6,200,000 shares of the outstanding 5.875% Series F perpetual preferred shares, $0.01 par value per share, for cash at the liquidation preference of $25.00 per share plus any accrued and unpaid dividends in accordance with the terms of such shares. The Operating Partnership also redeemed its corresponding Series F perpetual preferred units.