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REVENUE Contract Asset (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
Change in Contract with Customer, Asset [Abstract]  
Contract asset at January 1, 2020 $ 19,494
Revenue in excess of billings 22,045
Customer billings (26,263)
Contract asset at September 30, 2020 $ 15,276