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Share-Based Compensation (Tables)
 3 Months Ended
Apr. 30, 2017
Share-based Compensation [Abstract]  
Allocation Of Stock-Based Compensation
The following table summarizes pre-tax share-based compensation included in the Statements of Income for the three months ended April 30, 2017 and May 1, 2016.
 
Three Months Ended
(in thousands)
April 30, 2017
 
May 1, 2016
Revenue offset
$
5,280

 
$
—

Cost of sales
564

 
377

Selling, general and administrative
5,557

 
3,853

Product development and engineering
1,885

 
1,477

Share-based compensation
$
13,286

 
$
5,707

Net change in share-based compensation capitalized into inventory
$
(414
)
 
$
(5
)