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Revenue - Summary of Changes in Deferred Revenue (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Change in Contract with Customer, Liability [Roll Forward]  
Balance, December 31, 2020 $ 129,413
Deferral of revenue 112,008
Recognition of deferred revenue (101,306)
Foreign currency translation (1,478)
Balance, September 30, 2021 $ 138,637