Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v2.4.0.8
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Stock-Based Compensation Activity
A summary of stock-based compensation activity and changes for the twenty-six weeks ended June 30, 2013 are as follows:
 
Shares
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
(Year)
 
Aggregate
Intrinsic
Value
Outstanding and expected to vest at December 30, 2012
1,052,861

 
$
5.28

 
 
 
 
Granted
141,119

 
28.66

 
 
 
 
Exercised
(394,397
)
 
2.94

 
 
 
 
Forfeited
(2,175
)
 
8.22

 
 
 
 
Outstanding and expected to vest at June 30, 2013
797,408

 
$
10.57

 
5.98
 
$
22,150

Exercisable at June 30, 2013
512,418

 
$
5.00

 
4.48
 
$
17,086

Weighted Average Assumptions
The weighted-average grant date fair value of options granted during the twenty-six weeks ended June 30, 2013 was $10.93 per share, as estimated at the date of grant using the Black-Scholes pricing model with the following weighted-average assumptions: 
 
 
Dividend yield
0
%
Expected volatility
43
%
Risk-free rate of return
0.77
%
Expected life (in years)
5