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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
Schedule of effective income tax rate reconciliation

 
THIRTEEN WEEKS ENDED
 
TWENTY-SIX WEEKS ENDED
 
JUNE 30, 2019
 
JULY 1, 2018
 
JUNE 30, 2019
 
JULY 1, 2018
Effective income tax rate
3.9
%
 
(23.7
)%
 
6.6
%
 
(3.6
)%