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Income Taxes (Summary of Income Before Taxes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Income (loss) before income taxes: |  |  |  |
Income (loss) before income taxes | $ 37,646 | $ 7,078 | $ 56,977 | $ 11,379
Income tax provision (benefit) | 6,686 | 2,285 | 13,436 | 4,490
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 30,960 | $ 4,793 | $ 43,541 | $ 6,889
Income tax provision as a percentage of income before income taxes | 17.80% | 32.30% | 23.60% | 39.50%
Other Effective Tax Rate Provision (Benefit) | $ 100 | $ 200 | $ 300 | $ 400

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