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Income Taxes Unrecognized tax benefits (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Unrecognized tax benefits roll forward [Roll Forward] |  |  |  |
Unrecognized Tax Benefits | $ 21,537 | $ 18,443 | $ 15,027 | $ 10,824
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions | 231 | 502 | 138 |
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions | 3,242 | 2,987 | 4,231 |
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 0 | (15) | (3) |
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations | (31) | (58) | (163) |
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | $ 348 | $ 0 | $ 0 |

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