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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 28, 2018
Stockholders' Equity Note [Abstract]  
Activity of restricted stock awards
The following table reflects the activity of RSAs during the thirty-nine weeks ended September 28, 2018:
 
 
Shares
 
Weighted Average
Grant Date Fair Value
Unvested at December 29, 2017
 
329,761

 
$
16.69

Granted
 
311,671

 
23.61

Vested
 
(106,730
)
 
17.76

Forfeited
 
(1,506
)
 
17.13

Unvested at September 28, 2018
 
533,196

 
$
20.52