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BUSINESS COMBINATIONS - Acquisition of Belatrix (Details) - USD ($)
shares in Thousands, $ in Thousands
Aug. 09, 2019
Dec. 31, 2019
Aug. 01, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about business combination [line items]          
Cash paid   $ 103,978   $ 4,328 $ 21,300
Belatrix          
Disclosure of detailed information about business combination [line items]          
Cash paid $ 61,468        
Business acquisition, number of shares acquired (in shares) 5,000        
Period prior to closing of each share subscription 60 days        
Period prior to closing date 2 days        
Earn out payment   3,000      
Contingent liabilities recognised in business combination   $ 4,097 $ 2,091    
Consideration payment to be expensed     $ 909