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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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