Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 14,834	$ 5,140	$ 12,506	$ (5)
Unrealized gain (loss) on derivative agreements, net of tax	147	(1,024)	(770)	(1,809)
Total comprehensive income (loss)	14,981	4,116	11,736	(1,814)
Less: Comprehensive income attributable to noncontrolling interests	(14,039)	(13,318)	(18,945)	(18,652)
Total comprehensive income (loss) attributable to American Renal Associates Holdings, Inc.	$ 942	$ (9,202)	$ (7,209)	$ (20,466)