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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 02, 2016 | Jul. 04, 2015 | Jul. 02, 2016 | Jul. 04, 2015
Deferred: |  |  |  |
Income tax expense | $ 1,710 | $ 956 | $ 1,975 | $ 1,645
Effective income tax rate reconciliation |  |  |  |
Effective income tax rate (as a percent) | 9.90% | 11.20% | 8.50% | 10.50%
Components of deferred taxes |  |  |  |
Gross unrecognized tax benefits | $ 4,100 |  | $ 4,100 |
Gross unrecognized tax benefits which would affect the effective tax rate if recognized | 3,200 |  | 3,200 |
Interest in the provision for income taxes recognized |  |  | 100 | $ 100
Accrual for the payment of interest related to unrecognized tax positions | 100 |  | 100 |
Amount of estimated decrease in unrecognized tax benefits | $ 1,100 |  | $ 1,100 |

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