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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2018
Share-based Compensation [Abstract]  
Classification Of Stock-Based Compensation
The following table presents the classification of stock-based compensation:
 
Three Months Ended
March 31,
2018
 
2017
 
(In thousands)
Cost of revenues
$
1,609

 
$
1,735

Sales and marketing
1,448

 
1,429

Research and development
1,721

 
1,496

General and administrative
8,200

 
7,903

Total stock-based compensation expense
$
12,978

 
$
12,563
Nature Of Total Stock-Based Compensation
The following table presents the nature of the Company’s total stock-based compensation:
 
Three Months Ended
March 31,
 
2018
 
2017
 
(In thousands)
RSUs
$
9,287

 
$
9,154

Performance-based RSUs
3,113

 
3,088

ESPP
1,049

 
981

Capitalization (included in Property and equipment, net)
(471
)
 
(660
)
Total stock-based compensation expense
$
12,978

 
$
12,563