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Revenue - Schedule of Amortization Expense Related to Cost of Contracts (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenue From Contract With Customer [Abstract]        
Amortization expense $ 0.6 $ 0.3 $ 1.3 $ 0.9