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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 04, 2015
Jun. 28, 2014
Jul. 04, 2015
Jun. 28, 2014
Income Tax Contingency [Line Items]        
Unrecognized tax benefits, balance at the beginning of the period     $ 19,596 $ 24,716
Other changes in uncertain tax benefits     57 (1,952)
Unrecognized tax benefits, balance at the end of the period $ 19,653 $ 22,764 19,653 $ 22,764
Expected change in unrecognized tax benefits in the next twelve months $ (5,000)   $ (5,000)  
Income Taxes [Line Items]        
Effective income tax rate 14.60% 13.90% 14.90% 14.40%