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Income Taxes (Tables)
9 Months Ended
Sep. 29, 2019
Income Tax Disclosure [Abstract]  
Schedule of effective income tax rate reconciliation

 
THIRTEEN WEEKS ENDED
 
THIRTY-NINE WEEKS ENDED
(dollars in thousands)
SEPTEMBER 29, 2019
 
SEPTEMBER 30, 2018
 
SEPTEMBER 29, 2019
 
SEPTEMBER 30, 2018
(Benefit) provision for income taxes
$
(660
)
 
$
(3,317
)
 
$
6,051

 
$
(6,516
)
Effective income tax rate
(7.6
)%
 
(NM)

 
5.5
%
 
(7.2
)%

________________
NM    Not meaningful.