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Stock-based Compensation Stock-based Compensation (Tables)
 6 Months Ended
Jun. 28, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Share Activity [Table Text Block]
 A summary of all non-vested restricted shares and restricted stock units activity for the six months ended June 28, 2015 was as follows:
 
Non-Vested Shares
 
Restricted Stock Units
 
 
 
Weighted
 
 
 
Weighted
 
 
 
Average
 
 
 
Average
 
 
 
Grant Date
 
 
 
Grant Date
 
Shares
 
Price
 
Units
 
Price
Outstanding at December 28, 2014
424,497

 
$
20.50

 
20,783

 
$
45.04

Granted
48,796

 
61.69

 
27,508

 
63.93

Vested
(172,923
)
 
17.56

 
(108
)
 
45.04

Forfeited
(245
)
 
32.12

 
(2,419
)
 
49.37

Outstanding at June 28, 2015
300,125

 
$
28.88

 
45,764

 
$
56.17