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Acquisitions - Summary of Business Acquisition Pro Forma Results (Details) - Silver Lake Transaction [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]    
Revenue $ 509,154 $ 481,767
Net income (loss) $ (43,627) $ (56,549)