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FACILITY ACQUISITIONS AND ASSETS HELD FOR SALE (Details Narrative) - USD ($) $ in Thousands | Mar. 01, 2019 | Feb. 02, 2019 | Feb. 01, 2019 | Mar. 31, 2019 | Dec. 31, 2018
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Business Acquisition [Line Items] |  |  |  |  |
Goodwill acquired |  |  |  | $ 424,308 | $ 418,093
West Valley Imaging Group, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchase consideration |  |  | $ 3,000 |  |
Fixed assets acquired |  |  | 300 |  |
Other assets acquired |  |  | 7 |  |
Intangible assets acquired |  |  | 200 |  |
Goodwill acquired |  |  | $ 2,500 |  |
Payments to acquire equity method investments |  | $ 750 |  |  |
Noncontrolling interest, ownership percentage |  |  | 25.00% |  |
Ventura County Imaging Group, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to acquire equity method investments | $ 10,400 |  |  |  |
Ownership percentage | 60.00% |  |  |  |
Dignity Health | Partnership | Ventura County Imaging Group, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to acquire equity method investments | $ 6,100 |  |  |  |
Ownership percentage | 40.00% |  |  |  |
Payments to acquire equity method investments, Assets | $ 800 |  |  |  |
Ownership percentage in exchange for assets | 5.00% |  |  |  |
Payments to acquire equity method investments, Cash | $ 5,300 |  |  |  |
Ownership percentage in exchange for cash | 35.00% |  |  |  |

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