CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
NET (LOSS) INCOME	$ (1,749)	$ 23,440	$ 38,133
Foreign currency translation adjustments	(101)	(32)	(69)
Change in fair value of cash flow hedge, net of taxes	(19,372)	(10,253)	2,876
Change in fair value of cash flow hedge from prior periods reclassified to earnings	3,448	0	0
COMPREHENSIVE (LOSS) INCOME	(17,774)	13,155	40,940
Less comprehensive income attributable to noncontrolling interests	13,091	8,684	5,890
COMPREHENSIVE (LOSS) INCOME ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS	$ (30,865)	$ 4,471	$ 35,050