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Income Taxes (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Income tax provision |  |  | $ 2,606 | $ 765
Income tax expense (benefit) specific to the period |  |  | 2,800 | $ (100)
Federal corporate tax rate |  | 35.00% |  |
Unrecognized tax benefits that would impact effective tax rate |  | $ 1,100 | 1,100 |
Decrease in unrecognized tax benefits that is reasonably possible |  | $ 100 | 100 |
Accounting Standards Update 2016-09 |  |  |  |
Income tax provision |  |  | 500 |
Forecast |  |  |  |
Federal corporate tax rate | 21.00% |  |  |
Tax Cuts and Jobs Act of 2017 |  |  |  |
Income tax provision |  |  | 2,600 |
Tax Cuts and Jobs Act of 2017, Remeasurement Of Deferred Tax |  |  |  |
Income tax provision |  |  | 2,500 |
Tax Cuts and Jobs Act of 2017, One Time Transition Tax For Foreign Subsidiaries |  |  |  |
Income tax provision |  |  | $ 100 |

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