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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |  |  |
Effective income tax rate | 42.90% | (3.70%) | 21.00% | (1.90%) |
Reserve for uncertain tax positions | $ 675 |  | $ 675 |  | $ 631
Decrease in unrecognized tax benefits is reasonably possible | $ 179 |  | $ 179 |  |

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