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ACQUSITIONS AND DIVESTITURES 3 (NARRATIVE) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2015 | Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2018 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |
Investments in non-marketable equity investments |  |  |  | $ 2,119 | $ 1,384 |  |
CafeX [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 17.20% | 17.20%
Investments in non-marketable equity investments | $ 1,100 | $ 3,200 | $ 9,000 |  |  |  |
Bridge Loan |  |  |  |  |  | $ 2,100 |
Bridge loan stated interest rate |  |  |  |  |  | 12.00% |

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