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NONCONTROLLING INTEREST (NONCONTROLLING INTEREST ROLLFORWARD TABLE) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Stockholders' Equity Attributable to Noncontrolling Interest        
Noncontrolling interest, January 1     $ 7,677  
Dividends distributed to noncontrolling interest $ (1,350) $ (900) (3,600) $ (2,025)
Equity contribution     (3,362)  
Noncontrolling interest, September 30 12,422   12,422  
Percepta LLC        
Stockholders' Equity Attributable to Noncontrolling Interest        
Noncontrolling interest, January 1     7,677 6,978
Net income attributable to noncontrolling interest     5,168 3,489
Dividends distributed to noncontrolling interest     (3,600) (2,025)
Equity contribution     3,362  
Foreign currency translation adjustments     (185) (218)
Noncontrolling interest, September 30 $ 12,422 $ 8,224 $ 12,422 $ 8,224