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Quarterly Financial Information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Rents from single-family properties | $ 232,378 | $ 231,324 | $ 227,211 | $ 218,023 | $ 210,778 | $ 207,490 | $ 204,648 | $ 201,107 |  |  |
Net income (loss) | 34,734 | 30,281 | 25,898 | 21,525 | 30,533 | 19,097 | 15,066 | 11,796 | $ 112,438 | $ 76,492 | $ 10,446
Net (loss) income attributable to common shareholders/unitholders | $ 17,632 | $ (15,177) | $ (15,151) | $ 5,814 | $ (21,994) | $ 1,535 | $ (186) | $ (1,490) | $ 23,472 | $ (22,135) | $ (33,542)
Net income (loss) attributable to common shareholders per share—basic (in dollars per share) | $ 0.06 | $ 0.05 | $ (0.05) | $ 0.02 | $ (0.08) | $ 0.01 | $ 0.00 | $ (0.01) | $ 0.08 | $ (0.08) | $ (0.14)
Net income (loss) attributable to common shareholders per share - diluted (in dollars per share) | $ 0.06 | $ 0.05 | $ (0.05) | $ 0.02 | $ (0.08) | $ 0.00 | $ 0.00 | $ (0.01) | $ 0.08 | $ (0.08) | $ (0.14)
American Homes 4 Rent, L.P. |  |  |  |  |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Rents from single-family properties | $ 232,378 | $ 231,324 | $ 227,211 | $ 218,023 | $ 210,778 | $ 207,490 | $ 204,648 | $ 201,107 |  |  |
Net income (loss) | 34,734 | 30,281 | 25,898 | 21,525 | 30,533 | 19,097 | 15,066 | 11,796 | $ 112,438 | $ 76,492 | $ 10,446
Net (loss) income attributable to common shareholders/unitholders | $ 20,952 | $ 18,058 | $ (18,053) | $ 6,939 | $ (26,612) | $ 1,875 | $ (217) | $ (1,829) | $ 27,896 | $ (26,783) | $ (39,959)
Net income (loss) attributable to common unitholders per unit - basic (in dollars per share) | $ 0.06 | $ 0.05 | $ (0.05) | $ 0.02 | $ (0.08) | $ 0.01 | $ 0.00 | $ (0.01) | $ 0.08 | $ (0.08) | $ (0.14)
Net income (loss) attributable to common unitholders per unit - diluted (in dollars per share) | $ 0.06 | $ 0.05 | $ (0.05) | $ 0.02 | $ (0.08) | $ 0.00 | $ 0.00 | $ (0.01) | $ 0.08 | $ (0.08) | $ (0.14)

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