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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Taxes      
Balance at beginning of year $ 16,838 $ 15,495 $ 13,243
Additions based on tax positions related to current year 865 1,385 2,038
Additions for tax positions of prior years     214
Reductions for tax positions of prior years (286) (42)  
Balance at end of year $ 17,417 $ 16,838 $ 15,495