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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock Option Activity Under The Principal Option Plans
Option activity under the principal option plans as of December 28, 2014 and changes during the year then ended were as follows:

 
Number of
Shares

 
Weighted-
Average
Exercise
Price

 
Weighted-
Average
Remaining
Contractual
Term
(in years)
 
Aggregate
Intrinsic
Value
(in thousands)

Outstanding at December 29, 2013
2,450,660

 
$
17.70

 
4.35
 
$
4,285

Granted
212,080

 
14.78

 
 
 
 
Exercised
(69,836
)
 
9.05

 
 
 
 
Forfeited or expired
(243,457
)
 
16.93

 
 
 
 
Outstanding at December 28, 2014
2,349,447

 
$
17.77

 
3.98
 
$
2,716

Vested and expected to vest at December 28, 2014
2,312,566

 
$
17.85

 
3.90
 
$
2,642

Exercisable at December 28, 2014
1,932,834

 
$
18.89

 
3.02
 
$
1,971
Nonvested Service Based Restricted Stock Units
Nonvested service-based restricted stock units as of December 28, 2014 and changes during the year ended December 28, 2014 were as follows:

 
Number of
Shares

 
Weighted-
Average
Vest Date
(in years)

 
Weighted-
Average
Grant Date
Fair Value

Nonvested at December 29, 2013
852,508

 
0.64

 
$
17.36

Granted
349,040

 
 
 
$
14.38

Vested
(198,353
)
 
 
 
$
14.73

Forfeited
(62,338
)
 
 
 
$
12.81

Nonvested at December 28, 2014
940,857

 
0.56

 
$
17.11

Vested and expected to vest at December 28, 2014
905,394

 
0.51

 
 

Vested at December 28, 2014
61,250

 
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