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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Income Tax Disclosure [Abstract] |  |  |  |
Income tax expense increase (decrease) | $ 2,100 |  | $ (3,900) |
Income tax expense (benefit) | 14,049 | $ 11,864 | $ 10,641 | $ 14,509
Effective tax rate estimate |  |  | 11.60% | 21.90%
Unrecognized tax benefits | 12,900 | 10,600 | $ 12,900 | $ 10,600
Tax benefits that, if recognized, would affect the effective tax rate | $ 3,500 | $ 3,100 | $ 3,500 | $ 3,100

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