CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 26,145	$ 22,467	$ 58,136
Unrealized (loss) gain on derivative agreements, net of tax	(1,695)
Unrealized (loss) gain on derivative agreements, net of tax		1,181	(791)
Total comprehensive income	24,450	23,648	57,345
Less: Comprehensive income attributable to noncontrolling interests	(39,935)	(51,234)	(62,733)
Total comprehensive loss attributable to American Renal Associates Holdings, Inc.	$ (15,485)	$ (27,586)	$ (5,388)