NOTE 15 - SUPPLEMENTAL GUARANTOR INFORMATION (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
NET SERVICE FEE REVENUE
Provision for bad debts									$ (25,904)	$ (22,339)	$ (21,995)
Net service fee revenue	159,333	160,453	165,351	162,016	155,349	143,021	147,699	139,052
OPERATING EXPENSES
Operating expenses									542,993	477,828	420,973
Depreciation and amortization									57,740	57,481	53,997
(Gain) loss on sale and disposal of equipment									456	(2,240)	1,136
Severance costs									736	1,391	838
Total operating expenses	152,661	146,613	151,886	150,765	140,204	132,041	132,562	129,653	601,925	534,460	476,944
(LOSS) INCOME FROM OPERATIONS									45,228	50,661	41,713
OTHER EXPENSES
Interest expense									53,783	52,798	48,398
Loss on extinguishment of debt											9,871
Gain on deconsolidation of joint venture									(2,777)
Other (income) expenses									(3,679)	(5,075)	505
Total other expenses	13,038	9,738	12,131	12,420	11,982	11,736	12,461	11,544	47,327	47,723	58,774
(LOSS) INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF JOINT VENTURES									(2,099)	2,938	(17,061)
Provision for income taxes	(60,606)	30	421	245	102	234	337	147	59,910	(820)	(576)
Equity in earnings of joint ventures	(2,319)	(909)	(1,986)	(1,262)	(1,435)	(1,038)	(1,267)	(1,484)	6,476	5,224	4,952
NET INCOME (LOSS)	56,559	4,981	2,899	(152)	4,496	48	3,606	(808)	64,287	7,342	(12,685)
Net (loss) income attributable to noncontrolling interests	(70)	(72)	(47)	(41)	(51)	9	85	68	(230)	111	167
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS	56,629	5,053	2,946	(111)	4,547	39	3,521	(876)	64,517	7,231	(12,852)
Parent
OTHER EXPENSES
Equity in (losses) earnings of consolidated subsidiaries									64,517	7,231	(12,852)
NET INCOME (LOSS)									64,517	7,231	(12,852)
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS									64,517	7,231	(12,852)
Subsidiary Issuer [Member]
NET SERVICE FEE REVENUE
Service fee revenue, net of contractual allowances and discounts									146,976	125,916	119,659
Provision for bad debts									(5,452)	(4,485)	(5,243)
Net service fee revenue									141,524	121,431	114,416
OPERATING EXPENSES
Operating expenses									129,188	108,530	103,563
Depreciation and amortization									12,690	13,986	13,656
(Gain) loss on sale and disposal of equipment									600	(2,512)	141
Severance costs									69	267	490
Total operating expenses									142,547	120,271	117,850
(LOSS) INCOME FROM OPERATIONS									(1,023)	1,160	(3,434)
OTHER EXPENSES
Interest expense									31,392	30,458	25,405
Loss on extinguishment of debt											9,871
Other (income) expenses									(3,873)	(5,165)	362
Total other expenses									27,519	25,293	35,638
(LOSS) INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF JOINT VENTURES									(28,542)	(24,133)	(39,072)
Provision for income taxes									(21)	(46)	(38)
Equity in (losses) earnings of consolidated subsidiaries									93,080	31,410	26,258
NET INCOME (LOSS)									64,517	7,231	(12,852)
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS									64,517	7,231	(12,852)
Guarantor Subsidiaries [Member]
NET SERVICE FEE REVENUE
Service fee revenue, net of contractual allowances and discounts									467,853	423,173	363,918
Provision for bad debts									(17,888)	(15,443)	(14,293)
Net service fee revenue									449,965	407,730	349,625
OPERATING EXPENSES
Operating expenses									358,273	314,958	264,258
Depreciation and amortization									44,870	43,268	40,150
(Gain) loss on sale and disposal of equipment									(144)	272	995
Severance costs									641	1,124	321
Total operating expenses									403,640	359,622	305,724
(LOSS) INCOME FROM OPERATIONS									46,325	48,108	43,901
OTHER EXPENSES
Interest expense									22,391	22,337	22,965
Gain on deconsolidation of joint venture									(2,777)
Other (income) expenses									194	90	143
Total other expenses									19,808	22,427	23,108
(LOSS) INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF JOINT VENTURES									26,517	25,681	20,793
Provision for income taxes									59,936	(770)	(532)
Equity in (losses) earnings of consolidated subsidiaries									151	1,275	1,045
Equity in earnings of joint ventures									6,476	5,224	4,952
NET INCOME (LOSS)									93,080	31,410	26,258
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS									93,080	31,410	26,258
Non-Guarantor Subsidiaries [Member]
NET SERVICE FEE REVENUE
Service fee revenue, net of contractual allowances and discounts									58,228	58,371	57,075
Provision for bad debts									(2,564)	(2,411)	(2,459)
Net service fee revenue									55,664	55,960	54,616
OPERATING EXPENSES
Operating expenses									55,738	54,340	53,152
Depreciation and amortization									180	227	191
(Gain) loss on sale and disposal of equipment
Severance costs									26		27
Total operating expenses									55,738	54,567	53,370
(LOSS) INCOME FROM OPERATIONS									(74)	1,393	1,246
OTHER EXPENSES
Interest expense										3	28
Total other expenses										3	28
(LOSS) INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF JOINT VENTURES									(74)	1,390	1,218
Provision for income taxes									(5)	(4)	(6)
NET INCOME (LOSS)									(79)	1,386	1,212
Net (loss) income attributable to noncontrolling interests									(230)	111	167
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS									151	1,275	1,045
Eliminations [Member]
OTHER EXPENSES
Equity in (losses) earnings of consolidated subsidiaries									(157,748)	(39,916)	(14,451)
NET INCOME (LOSS)									(157,748)	(39,916)	(14,451)
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS									(157,748)	(39,916)	(14,451)
Consolidated
NET SERVICE FEE REVENUE
Service fee revenue, net of contractual allowances and discounts									673,057	607,460	540,652
Provision for bad debts									(25,904)	(22,339)	(21,995)
Net service fee revenue									647,153	585,121	518,657
OPERATING EXPENSES
Operating expenses									542,993	477,828	420,973
Depreciation and amortization									57,740	57,481	53,997
(Gain) loss on sale and disposal of equipment									456	(2,240)	1,136
Severance costs									736	1,391	838
Total operating expenses									601,925	534,460	476,944
(LOSS) INCOME FROM OPERATIONS									45,228	50,661	41,713
OTHER EXPENSES
Interest expense									53,783	52,798	48,398
Loss on extinguishment of debt											9,871
Gain on deconsolidation of joint venture									(2,777)
Other (income) expenses									(3,679)	(5,075)	505
Total other expenses									47,327	47,723	58,774
(LOSS) INCOME BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF JOINT VENTURES									(2,099)	2,938	(17,061)
Provision for income taxes									59,910	(820)	(576)
Equity in earnings of joint ventures									6,476	5,224	4,952
NET INCOME (LOSS)									64,287	7,342	(12,685)
Net (loss) income attributable to noncontrolling interests									(230)	111	167
NET INCOME (LOSS) ATTRIBUTABLE TO RADNET, INC. COMMON STOCKHOLDERS									$ 64,517	$ 7,231	$ (12,852)