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FACILITY ACQUISITIONS, ASSETS HELD FOR SALE AND DISPOSITIONS (Details - Narrative) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 01, 2019 | Apr. 01, 2019 | Mar. 01, 2019 | Feb. 28, 2019 | Feb. 01, 2019 | Jan. 01, 2019 | Dec. 03, 2018 | Nov. 05, 2018 | Nov. 01, 2018 | Oct. 01, 2018 | Sep. 01, 2018 | Apr. 12, 2018 | Apr. 01, 2018 | Feb. 22, 2018 | Jan. 01, 2018 | Sep. 01, 2017 | Jul. 01, 2017 | Apr. 28, 2017 | Apr. 01, 2017 | Nov. 06, 2014 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Aug. 01, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (134) |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,000 |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 440,981 | $ 418,093 | $ 256,776 |
Fair value of investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,001 | 30,030 |  |
Gain on step up valuation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 768 | 39,539 | 0 |
Capital lease assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,000 |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 132 | 0 | 0 |
Severance costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,619 | $ 1,931 | $ 1,821 |
Breastlink Medical |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 845 |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,800 |  |  |  |  |  |  |  |
Severance costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,200 |  |  |  |  |  |  |  |
Advanced Imaging at Timonium |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,900 |  |  |  |  |  |  |
Transfer of fixed assets to new joint venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100 |  |  |  |  |  |  |
Proceeds in excess of book value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,800 |  |  |  |  |  |  |
Rhode Island Medical Imaging, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,900 |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,500 |  |  |  |  |  |
West Valley Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,900 |  |  |  |  |
Transfer of fixed assets to new joint venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000 |  |  |  |  |
Proceeds in excess of book value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,800 |  |  |  |  |
Oncology practices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 361 |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,200 |  |  |  |  |
Garden State Radiology Network LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of ownership interest | $ 1,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired | 679 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating lease liabilities acquired | 426 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets acquired | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets acquired | 426 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,200 |  |  |  |
Nulogix, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage | 75.00% |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |
Sale of ownership interest | $ (504) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments | $ 1,500 |  |  |  |  |  |  |  |  |  |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |
Jefferson Health |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New Jersey Imaging Network, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage |  |  |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired | $ 3,100 |  |  |  |  |  |  |  |  | $ 34,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  | 106,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unfavorable lease contracts acquired |  |  |  |  |  |  |  |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets acquired |  |  |  |  |  |  |  |  |  | 235 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net working capital acquired |  |  |  |  |  |  |  |  |  | 11,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment debt assumed |  |  |  |  |  |  |  |  |  | 5,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank debt assumed |  |  |  |  |  |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of investment |  |  |  |  |  |  |  |  |  | 42,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment of New Jersey Imaging Network investment balance |  |  |  |  |  |  |  |  |  | 44,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on step up valuation |  |  |  |  |  |  |  |  |  | 39,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nulogix,Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired | 189 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired | 1,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired | 732 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability | $ 278 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Kern Radiology Imaging Systems Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  | $ 10,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating lease liabilities acquired |  | 14,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets acquired |  | 36 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets acquired |  | 9,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  | 10,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  | 3,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | 19,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Zilkha Radiology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  | 2,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating lease liabilities acquired |  | 5,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets acquired |  | 5,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  | 2,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | 4,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finance lease liabilities acquired |  | $ 332 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hudson Valley Radiology Associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  | $ 3,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  | 340 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | 680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of RadNet stock issued in acquisition |  |  |  | 6,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment acquired |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
West Valley Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  | $ 300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets acquired |  |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  | 2,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  | 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  | 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Orange County Diagnostics Imaging Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  | $ 2,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets acquired |  |  |  |  |  |  | 69 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  | 3,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  | 6,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets acquired |  |  |  |  |  |  | 23 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Arcadia Radiology Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  | $ 2,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  | 3,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment acquired |  |  |  |  |  |  |  | 80 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets acquired |  |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Southern California Diagnostic Imaging, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  | $ 41 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  | 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment acquired |  |  |  |  |  |  |  |  | 110 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets acquired |  |  |  |  |  |  |  |  | 18 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Medical Arts Radiology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  | 16,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  | 40,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  | 59,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unfavorable lease contracts acquired |  |  |  |  |  |  |  |  |  | 130 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets acquired |  |  |  |  |  |  |  |  |  | 224 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net working capital acquired |  |  |  |  |  |  |  |  |  | 2,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment debt assumed |  |  |  |  |  |  |  |  |  | 2,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash acquired from acquisition |  |  |  |  |  |  |  |  |  | 50,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration to guarantee share value issued |  |  |  |  |  |  |  |  |  | 739 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  |  | 50,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Washington Heights Medical Management, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  | $ 904 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  | 2,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets acquired |  |  |  |  |  |  |  |  |  |  | 43 |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  |  |  | 3,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Women's Imaging Specialists in Healthcare |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | $ 636 |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  | 4,300 |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  |  |  |  |  | 5,100 |  |  |  |  |  |  |  |  |  |  |
Valley Metabolic Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 22 |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  | 1,500 |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  |  |  |  |  | 1,700 |  |  |  |  |  |  |  |  |  |  |
Sierra Imaging Associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 270 |  |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  | 1,100 |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  |  |  |  |  | 1,500 |  |  |  |  |  |  |  |  |  |  |
Imaging Services Company of New York |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000 |  |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,700 |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,800 |  |  |  |  |  |  |  |  |  |
Ventura County Imaging Group, LLC. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  | $ 10,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dignity Health. | Ventura County Imaging Group, LLC. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  | $ 4,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  | 6,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments, Assets |  |  | $ 800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage in exchange for assets |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments, cash |  |  | $ 5,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage in exchange for cash |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leasehold improvements | Arcadia Radiology Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  | 819 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leasehold improvements | Southern California Diagnostic Imaging, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  | 1,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Hudson Valley Radiology Associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  | 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Orange County Diagnostics Imaging Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  | $ 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Arcadia Radiology Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  | $ 300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Southern California Diagnostic Imaging, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  | $ 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Medical Arts Radiology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  | 24 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Washington Heights Medical Management, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  |  | $ 50 |  |  |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Women's Imaging Specialists in Healthcare |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 143 |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Valley Metabolic Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 183 |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Sierra Imaging Associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 83 |  |  |  |  |  |  |  |  |  |  |
Noncompete Agreements | Imaging Services Company of New York |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |
Trade Names | New Jersey Imaging Network, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  | 582 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade Names | Hudson Valley Radiology Associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  | 380 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade Names | Medical Arts Radiology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  | 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade Names | Women's Imaging Specialists in Healthcare |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | $ 53 |  |  |  |  |  |  |  |  |  |  |
Common Stock | Medical Arts Radiology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of RadNet stock issued in acquisition |  |  |  |  |  |  |  |  |  | $ 8,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
RadNet stock issued in acquisition (shares) |  |  |  |  |  |  |  |  |  | 531,560 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Primedex Health Systems Inc. and Radiologix | Hudson Valley Radiology Associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unfavorable lease contracts acquired |  |  |  | $ 2,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
MemorialCare Medical Foundation | Beach Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,600 |  |  |  |  |  |  |  |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 545 |  |  |  |  |  |  |  |  |
Equipment acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,400 |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,300 |  |  |  |  |  |  |  |  |
Capital lease assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,000 |  |  |  |  |  |  |  |  |
RadNet | Advanced Imaging at Timonium |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |
RadNet | West Valley Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |
RadNet | Beach Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |
MemorialCare Medical Foundation | Beach Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |
West Valley Imaging Group, LLC | West Valley Imaging Group, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  |  |  | $ 750 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Santa Monica Imaging Group | RadNet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage |  |  |  |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  | 40.00%
Sale of ownership interest |  |  |  |  |  | $ (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Santa Monica Imaging Group | Cedars Sinai Medical Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  | 60.00%
Additional equity interest acquired |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment owned, at fair value |  |  |  |  |  | $ 134 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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