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Earnings per Share / Unit (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 $ / shares | Sep. 30, 2016 $ / shares | Jun. 30, 2016 $ / shares | Mar. 31, 2016 $ / shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) $ / shares shares
Numerator: |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | $ 76,492 | $ 10,446 | $ (47,948)
Noncontrolling interest |  |  |  |  | (4,507) | 3,751 | 14,353
Dividends on preferred shares/Preferred distributions |  |  |  |  | 60,718 | 40,237 | 22,276
Redemption of participating preferred shares/units |  |  |  |  | 42,416 | 0 | 0
Numerator for basic loss per common share/unit - basic and diluted |  |  |  |  | $ (22,135) | $ (33,542) | $ (84,577)
Denominator: |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic and diluted (in shares) | shares |  |  |  |  | 264,254,718 | 234,010,168 | 210,600,111
Net income (loss) per common share/unit |  |  |  |  |  |  |
Net loss attributable to common shareholders per share - basic and diluted (in dollars per share) | $ / shares | $ 0.01 | $ (0.09) | $ (0.04) | $ (0.02) | $ (0.08) | $ (0.14) | $ (0.40)
Potentially dilutive securities | shares |  |  |  |  | 17,084,135 | 32,914,593 | 19,636,050
Class A Units |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |
Noncontrolling interest |  |  |  |  | $ (4,648) | $ (6,417) | $ (4,282)
American Homes 4 Rent, L.P. |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | 76,492 | 10,446 | (47,948)
Noncontrolling interest |  |  |  |  | 141 | (562) | (157)
Dividends on preferred shares/Preferred distributions |  |  |  |  | 60,718 | 40,237 | 22,276
Redemption of participating preferred shares/units |  |  |  |  | 42,416 | 0 | 0
Income allocated to Series C and D limited partners |  |  |  |  | 0 | 10,730 | 20,212
Numerator for basic loss per common share/unit - basic and diluted |  |  |  |  | $ (26,783) | $ (39,959) | $ (90,279)
Denominator: |  |  |  |  |  |  |
Weighted-average common units outstanding - basic and diluted (in shares) | shares |  |  |  |  | 319,753,206 | 277,912,532 | 225,040,781
Net income (loss) per common share/unit |  |  |  |  |  |  |
Net loss attributable to common shareholders per share - basic and diluted (in dollars per share) | $ / shares | $ (0.01) | $ (0.07) | $ (0.04) | $ (0.01) |  |  |
Net loss per common unit - basic and diluted (in dollars per share) | $ / shares |  |  |  |  | $ (0.08) | $ (0.14) | $ (0.40)
Potentially dilutive securities | shares |  |  |  |  | 17,084,135 | 32,914,593 | 19,636,050
American Homes 4 Rent, L.P. | Series C Operating Partnership Units |  |  |  |  |  |  |
Net income (loss) per common share/unit |  |  |  |  |  |  |
Net loss per common unit - basic and diluted (in dollars per share) | $ / shares |  |  |  |  | $ 0 | $ 0.61 | $ 0.60
American Homes 4 Rent, L.P. | Series D Operating Partnership Units |  |  |  |  |  |  |
Net income (loss) per common share/unit |  |  |  |  |  |  |
Net loss per common unit - basic and diluted (in dollars per share) | $ / shares |  |  |  |  | 0 | 1.32 | 0
American Homes 4 Rent, L.P. | Series E Operating Partnership Units |  |  |  |  |  |  |
Net income (loss) per common share/unit |  |  |  |  |  |  |
Net loss per common unit - basic and diluted (in dollars per share) | $ / shares |  |  |  |  | $ 0 | $ 0 | $ 0
Operating Partnership | Class A Units |  |  |  |  |  |  |
Net income (loss) per common share/unit |  |  |  |  |  |  |
Stock exchange ratio |  |  |  |  | 1 |  |

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