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Income Taxes (Tables)
6 Months Ended
Jul. 01, 2017
Income Taxes [Abstract]  
Unrecognized Tax Benefits Roll Forward

The following is a summary of the activity of the Company's unrecognized tax benefits for the six months ended July 1, 2017 and July 2, 2016 (in thousands):

   July 1, 2017 July 2, 2016
Balance at the beginning of the period $ 9,964 $ 14,450
 Net changes in uncertain tax benefits   (1,870)   (2,563)
Balance at the end of the period $ 8,094 $ 11,887