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ACQUISITIONS AND DIVESTITURES 4 (NARRATIVE) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]            
Impairment of equity investment   $ 0 $ 0 $ 15,632    
Investments in non-marketable equity investments   $ 0 $ 0 $ 2,119    
CafeX [Member]            
Business Acquisition [Line Items]            
Equity Method Investment, Ownership Percentage   17.80%        
Impairment of equity investment $ 15,600          
Investments in non-marketable equity investments         $ 13,300 $ 13,300
Bridge Loan $ 2,100          
Bridge loan stated interest rate 12.00%