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Income Taxes (Details 7) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of the beginning and ending amounts of unrecognized income tax benefits |  |  |
Balance at beginning of the period | $ 146,215 | $ 134,044 | $ 115,653
Tax positions related to current year: |  |  |
Additions | 18,515 | 18,748 | 18,600
Tax positions related to prior years: |  |  |
Additions | 0 | 615 | 0
Reductions | (199) | (1,586) | (209)
Settlements | 0 | (5,606) | 0
Balance at end of the period | $ 164,531 | $ 146,215 | $ 134,044

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