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ACCOUNTING POLICIES - Schedule of Domestic and Foreign Break out Percentages (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Medical Services Revenues |  |  |
Accounting Policies [Line Items] |  |  |
Break out, percentage | 100.00% | 100.00% | 100.00%
Property, Plant and Equipment |  |  |
Accounting Policies [Line Items] |  |  |
Break out, percentage | 100.00% | 100.00% | 100.00%
Domestic | Medical Services Revenues |  |  |
Accounting Policies [Line Items] |  |  |
Break out, percentage | 94.00% | 96.00% | 99.00%
Domestic | Property, Plant and Equipment |  |  |
Accounting Policies [Line Items] |  |  |
Break out, percentage | 93.00% | 93.00% | 93.00%
Foreign | Medical Services Revenues |  |  |
Accounting Policies [Line Items] |  |  |
Break out, percentage | 6.00% | 4.00% | 1.00%
Foreign | Property, Plant and Equipment |  |  |
Accounting Policies [Line Items] |  |  |
Break out, percentage | 7.00% | 7.00% | 7.00%

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