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Share-Based Compensation Share-Based Compensation (Tables)
 6 Months Ended
Aug. 01, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Stock option activity under the Plan was as follows:
 
 
Options
Outstanding
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
(in years)
Balance as of January 31, 2015
1,160,934

 
$
24.80

 
8.0
Granted
116,894

 
28.58

 
 
Forfeited
(53,953
)
 
33.62

 
 
Exercised
(93,020
)
 
8.22

 
 
Balance as of August 1, 2015
1,130,855

 
26.13

 
7.7
Exercisable as of August 1, 2015
553,974

 
$
19.56

 
6.9
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair value of each option award granted to employees, including outside directors, is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
 
Twenty-Six Weeks Ended
August 1, 2015
 
August 2, 2014
Expected volatility
47.0
%
 
47.0
%
Risk-free interest rate
1.8
%
 
1.9
%
Expected life of options
6.4 years

 
6.4 years

Expected dividend yield
—
%
 
—
%
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
RSU and PSU activity during the twenty-six weeks ended August 1, 2015 was as follows:
 
Restricted Stock Units
 
Performance-Based Restricted Stock Units
 
Number
 
Weighted-Average Grant Date Fair Value
 
Number
 
Weighted-Average Grant Date Fair Value
Non-vested balance as of January 31, 2015
147,770

 
$
35.95

 
392,181

 
$
38.20

Granted
112,875

 
30.57

 
85,282

 
28.58

Forfeited
(824
)
 
38.75

 
—

 
—

Non-vested balance as of August 1, 2015
259,821

 
$
33.60

 
477,463

 
$
36.48