Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of basic and diluted earnings (loss) per share

	Year Ended December 31,
	2019			2018			2017
Basic and Diluted
Net loss attributable to American Renal Associates Holdings, Inc.	$	(13,790	)	$	(28,767	)	$	(4,597	)
Change in the difference between the redemption values and estimated fair values for accounting purposes of the related noncontrolling interests	(7,999		)	(2,566		)	(11,503		)
Net loss attributable to common shareholders	(21,789		)	(31,333		)	(16,100		)
Weighted‑average common shares outstanding	32,274,570			31,965,844			31,081,824
Weighted‑average common shares outstanding, assuming dilution	32,274,570			31,965,844			31,081,824
Loss per share, basic and diluted	$	(0.68	)	$	(0.98	)	$	(0.52	)
Outstanding options and restricted stock excluded as impact would be antidilutive	2,986,656			3,442,048			1,894,340