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Income Taxes - Unrecognized Tax Benefits (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2021
USD ($)
Income Taxes  
Balance - January 1, 2021 $ 3,231
Tax settlement matters - prior periods (1,476)
Change in tax position (174)
Interest accrual 57
Foreign currency remeasurement (27)
Balance - June 30, 2021 $ 1,611