CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUE
Service fee revenue	$ 1,315,077	$ 1,071,840	$ 1,154,179
Provider relief funding	9,110	26,264	0
OPERATING EXPENSES
Cost of operations, excluding depreciation and amortization	1,123,274	965,902	999,692
Lease abandonment charges	19,675	0	0
Depreciation and amortization	96,694	86,795	80,607
Loss on sale and disposal of equipment and other	1,246	1,200	2,383
Loss on impairment	0	4,170	0
Severance costs	744	4,353	1,619
Total operating expenses	1,241,633	1,062,420	1,084,301
INCOME FROM OPERATIONS	82,554	35,684	69,878
OTHER INCOME AND EXPENSES
Interest expense	48,830	45,882	48,044
Equity in earnings of joint ventures	(10,967)	(7,945)	(8,350)
Non-cash change in fair value of interest rate hedge	(21,670)	2,528	0
Gain on re-measurement of pre-existing interest	0	0	(768)
Loss on extinguishment of debt	6,044	(4,047)	0
Other expenses	1,438	120	1,283
Total other expenses	23,675	36,538	40,209
INCOME (LOSS) BEFORE INCOME TAXES	58,879	(854)	29,669
Provision for income taxes	(14,560)	(895)	(6,229)
NET INCOME (LOSS)	44,319	(1,749)	23,440
Net income attributable to noncontrolling interests	19,592	13,091	8,684
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS	$ 24,727	$ (14,840)	$ 14,756
BASIC NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS (in dollars per share)	$ 0.47	$ (0.29)	$ 0.30
DILUTED NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS (in dollars per share)	$ 0.46	$ (0.29)	$ 0.29
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	52,496,679	50,891,791	49,674,858
Diluted (in shares)	53,421,033	50,891,791	50,244,006
Service fee revenue
REVENUE
Service fee revenue	$ 1,166,743	$ 931,722	$ 1,028,236
Revenue under capitation arrangements
REVENUE
Service fee revenue	$ 148,334	$ 140,118	$ 125,943