5. GOODWILL AND OTHER INTANGIBLE ASSETS (Details - Schedule of Goodwill) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Goodwill, beginning balance	$ 200,304	$ 196,395
Adjustments to preliminary allocations of purchase price		200
Goodwill, ending balance	239,408	200,304
New Jersey Imaging Powers, Inc. [Member]
Adjustments to preliminary allocations of purchase price	(18,833)
Corinthian [Member]
Goodwill acquired through acquisitions		310
Westchester Imaging [Member]
Goodwill acquired through acquisitions		231
Garden State Radiology, LLC [Member]
Goodwill acquired through acquisitions		50
Medical Imaging of Manhattan [Member]
Goodwill acquired through acquisitions		1,433
Liberty Pacific Imaging Long Beach [Member]
Goodwill acquired through acquisitions		1,288
Moreno Valley Imaging [Member]
Goodwill acquired through acquisitions		362
Hematology Oncology Consultants [Member]
Goodwill acquired through acquisitions		$ 235
California Radiology [Member]
Goodwill acquired through acquisitions	2,107
New York Radiology Partners [Member]
Goodwill acquired through acquisitions	9,897
Hanford Imaging, L.P. [Member]
Goodwill acquired through acquisitions	785
Murray Hill Radiology [Member]
Goodwill acquired through acquisitions	4,123
Philip L. Chatham, M.D., Inc. [Member]
Goodwill acquired through acquisitions	790
Diagnostic Imaging Group, LLC [Member]
Goodwill acquired through acquisitions	$ 40,035

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
-Paragraph 1
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