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Stock-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2016
Share-based Compensation [Abstract]  
Stock-based compensation expense recognized in the Consolidated Statements of Income and capitalized in the Consolidated Balance Sheets
Stock-based compensation expense recognized in the Consolidated Statements of Income are as follows (in thousands):
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
Cost of goods sold
$
881

 
$
799

 
$
2,351

 
$
2,283

Research and development
1,225

 
1,259

 
3,639

 
3,584

Selling, general and administrative
4,766

 
4,454

 
15,263

 
13,582

Stock-based compensation expense
$
6,872

 
$
6,512

 
$
21,253

 
$
19,449

Stock-based compensation costs capitalized in inventory are as follows (in thousands):
 
 
September 30,
 
2016
 
2015
Capitalized in inventory
$
585

 
$
667