XML 34 R30.htm IDEA: XBRL DOCUMENT v3.3.0.814
Stock-Based Compensation (Tables)
8 Months Ended
Sep. 12, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Weighted-Average Assumptions to Estimated Fair Value of Stock Options Granted
The estimated weighted average fair value for each option granted during the 36 weeks ended September 12, 2015 and September 6, 2014 was $6.37 and $6.21, respectively, with the following weighted average assumptions:
 
36 Weeks Ended
 
September 12,
2015
 
September 6,
2014
Expected market price volatility (1)
28.8
%
 
29.6
%
Risk-free interest rate (2)
1.3
%
 
1.2
%
Dividend yield (3)
0.9
%
 
0.9
%
Expected term (4)
4 years

 
4 years

(1) 
Based on historical volatility of the Company’s common stock. The expected volatility is based on the daily percentage change in the price of the stock over the four years prior to the grant.
(2) 
Represents the U.S. Treasury yield curve in effect for the expected term of the option at the time of grant.
(3) 
Represents the Company’s estimated cash dividend yield for the expected term.
(4) 
Represents the period of time that options granted are expected to be outstanding. As part of the determination of the expected term, the Company concluded that all employee groups exhibit similar exercise and post-vesting termination behavior.