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Long-Lived Assets - Rollforward of Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Goodwill RollForward    
Beginning balance $ 272,322 $ 259,164
Goodwill acquired during the period 50,550 9,083
Adjustments related to prior acquisitions (60) (60)
Effects of changes in foreign currency exchange rates (1,482) 4,135
Ending balance $ 321,330 $ 272,322