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Income Taxes (Tables)
 6 Months Ended
Jul. 02, 2016
Income Tax Disclosure [Abstract]  
Schedule of components of income tax expense (benefit)
The components of the effective tax rate are as follows (in thousands, except percentage):
 
Quarters Ended
 
Six Months Ended
 
July 2, 2016
 
July 4, 2015
 
July 2, 2016
 
July 4, 2015
Income (loss) before income taxes
$
3,335

 
$
(2,908
)
 
$
(23,545
)
 
$
(40,697
)
Income tax expense
1,649

 
2,230

 
2,781

 
2,763

Effective tax rate
49.4
%
 
(76.7
)%
 
(11.8
)%
 
(6.8
)%