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Revenue Recognition - Schedule of Contract Liability Activity (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Change in Contract with Customer, Liability [Abstract]    
Beginning balance $ 18,252 $ 12,948
Payments in advance of satisfaction of performance obligations 23,204 25,614
Revenue recognized (27,981) (20,687)
Other, including translation adjustments 478 377
Ending balance $ 13,953 $ 18,252