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Share-Based Compensation (Tables)
 3 Months Ended
Apr. 29, 2018
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 29, 2018 and April 30, 2017.
 
Three Months Ended
(in thousands)
April 29, 2018
 
April 30, 2017
Revenue offset
$
21,501

 
$
5,280

Cost of sales
328

 
564

Selling, general and administrative
11,462

 
5,557

Product development and engineering
2,225

 
1,885

Share-based compensation
$
35,516

 
$
13,286

Net change in share-based compensation capitalized into inventory
$
—

 
$
(414
)