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Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 02, 2016
Jun. 27, 2015
Jul. 02, 2016
Jun. 27, 2015
Tax provision $ 2,463 $ 3,754 $ 4,260 $ 6,105
Effective income tax rate 33.90% 34.10% 32.80% 33.70%