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Stock-Based Compensation (Tables)
 3 Months Ended
Apr. 01, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Nonvested Share Activity [Table Text Block]
A summary of all non-vested shares activity for the three months ended April 1, 2018 was as follows:
 
Shares
 
Weighted Average Grant Date Price
Non-vested at December 31, 2017
722,459

 
$
12.76

Granted
380,192

 
13.25

Vested
(283,248
)
 
12.52

Non-vested at April 1, 2018
819,403

 
$
13.07