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Revenue from Contracts with Customer - Schedule of Contract Assets and Deferred Revenue (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Jan. 01, 2019
Revenue from Contract with Customer [Abstract]      
Contract assets $ 313 $ 644 $ 173
Deferred revenues $ 179,900 $ 213,145 $ 212,529