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Stock-based Compensation (Tables)
 3 Months Ended
May 05, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation Expense [Table Text Block]
Stock-based compensation expense consisted of the following:
 
Three months ended
(in thousands)
May 5, 2018
 
April 29, 2017
Stock options
$
1,795

 
$
1,751

Restricted and director stock units
2,719

 
1,858

 
$
4,514

 
$
3,609
Stock Option Plan Activity
The following table summarizes the stock-based compensation award activity for the three months ended May 5, 2018:
 
Number of shares
(in thousands)
Stock Options
 
Time-Based RSUs
 
Performance-Based RSUs
Outstanding - beginning of period
4,333

 
436

 
457

Granted
—

 
589

 
244

Exercised / vested
(126
)
 
(39
)
 
(49
)
Forfeited / expired
(33
)
 
(7
)
 
(4
)
Outstanding - end of period
4,174

 
979

 
648