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Earnings per Share / Unit - Computation of Earnings per Share (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) $ / shares shares
Numerator: |  |  |  |  |  |  |  |
Net income | $ 40,153 | $ 31,807 | $ 37,527 | $ 41,401 | $ 40,304 | $ 33,091 | $ 109,487 | $ 114,796
Less: |  |  |  |  |  |  |  |
Noncontrolling interest | 3,819 |  |  | 4,099 |  |  | 9,976 | 11,129
Dividends on preferred shares | 13,782 | $ 13,782 | $ 13,782 | 13,782 | $ 13,782 | $ 13,782 | 41,346 | 41,346
Allocation to participating securities | 56 |  |  | 48 |  |  | 152 | 122
Numerator for income per common share–basic and diluted | $ 22,496 |  |  | $ 23,472 |  |  | $ 58,013 | $ 62,199
Denominator |  |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic (in shares) | shares | 308,080,226 |  |  | 300,580,978 |  |  | 303,319,053 | 298,974,146
Effect of dilutive securities: |  |  |  |  |  |  |  |
Share-based compensation plan (in shares) | shares | 461,276 |  |  | 451,877 |  |  | 456,503 | 505,088
Weighted-average common shares outstanding - diluted (in shares) | shares | 308,541,502 |  |  | 301,032,855 |  |  | 303,775,556 | 299,479,234
Net income attributable to common shareholders per share: |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ / shares | $ 0.07 |  |  | $ 0.08 |  |  | $ 0.19 | $ 0.21
Diluted (in dollars per share) | $ / shares | $ 0.07 |  |  | $ 0.08 |  |  | $ 0.19 | $ 0.21
Exchange rate |  |  |  |  |  |  | 1 |
American Homes 4 Rent, L.P. |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |
Net income | $ 40,153 |  |  | $ 41,401 |  |  | $ 109,487 | $ 114,796
Less: |  |  |  |  |  |  |  |
Dividends on preferred shares | 13,782 |  |  | 13,782 |  |  | 41,346 | 41,346
Allocation to participating securities | 56 |  |  | 48 |  |  | 152 | 122
Numerator for income per common share–basic and diluted | $ 26,315 |  |  | $ 27,571 |  |  | $ 67,989 | $ 73,328
Denominator |  |  |  |  |  |  |  |
Weighted-average common units outstanding - basic (in shares) | shares | 360,107,206 |  |  | 352,714,480 |  |  | 355,346,033 | 352,362,220
Effect of dilutive securities: |  |  |  |  |  |  |  |
Share-based compensation plan (in shares) | shares | 461,276 |  |  | 451,877 |  |  | 456,503 | 505,088
Weighted-average common units outstanding - diluted (in shares) | shares | 360,568,482 |  |  | 353,166,357 |  |  | 355,802,536 | 352,867,308
Net income attributable to common shareholders per share: |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ / shares | $ 0.07 |  |  | $ 0.08 |  |  | $ 0.19 | $ 0.21
Diluted (in dollars per share) | $ / shares | $ 0.07 |  |  | $ 0.08 |  |  | $ 0.19 | $ 0.21

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