XML 37 R25.htm IDEA: XBRL DOCUMENT v3.8.0.1
STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-based Compensation Expense
The following table summarizes the stock-based compensation expense for the three and nine months ended September 30, 2017, and September 30, 2016:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
(In thousands)
2017

2016
 
2017
 
2016
Cost of revenues
$
391

 
$
348

 
$
885

 
$
731

Research and development
2,173

 
1,934

 
6,158

 
5,343

Sales and marketing
1,441

 
1,303

 
3,727

 
3,229

General and administrative
2,521

 
2,204

 
7,052

 
5,914

Total stock-based compensation expense
$
6,526

 
$
5,789

 
$
17,822

 
$
15,217
Summary of Option Activity Under the Plans
A summary of stock options outstanding as of September 30, 2017, and activity during the nine months then ended, is presented below:
 
Shares
(in thousands)
 
Weighted-
Average
Exercise
Price
 
Weighted-Average
Remaining
Contractual Term
(in years)
 
Aggregate
Intrinsic Value
(in thousands)
Outstanding at January 1, 2017
697

 
$
28.62

 
 
 
 
Granted
—

 
—

 
 
 
 
Exercised
(106
)
 
$
29.96

 
 
 
 
Forfeited or expired
—

 
—

 
 
 
 
Outstanding at September 30, 2017
591

 
$
28.38

 
2.15
 
$
26,516

Vested and exercisable at September 30, 2017
591

 
 
 
2.15
 
$
26,516
Performance Based Awards (PSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
A summary of PSUs outstanding as of September 30, 2017, and activity during the nine months then ended, is presented below:
 
Shares
(in thousands)
 
Weighted-Average
Grant Date Fair
Value Per Share
 
Weighted-Average
Remaining
Contractual Term
(in years)
 
Aggregate
Intrinsic Value
(in thousands)
Outstanding at January 1, 2017
99

 
$
46.25

 
 
 
 
Granted
88

 
$
63.99

 
 
 
 
Vested
(99
)
 
$
46.25

 
 
 
 
Forfeited
—

 
—

 
 
 
 
Outstanding at September 30, 2017
88

 
$
63.99

 
0.25
 
$
6,416

Outstanding and expected to vest at September 30, 2017
79

 
 
 
0.25
 
$
5,768
Long-Term Performance-Based Awards (PRSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
A summary of PRSUs outstanding as of September 30, 2017, and activity during the nine months then ended, is presented below:
 
Shares
(in thousands)
 
Weighted-Average
Grant Date Fair
Value Per Share
 
Weighted-Average
Remaining
Contractual Term
(in years)
 
Aggregate
Intrinsic Value
(in thousands)
Outstanding at January 1, 2017
150

 
$
47.65

 
 
 
 
Granted
71

 
$
63.00

 
 
 
 
Vested
—

 
—

 
 
 
 
Forfeited
(7
)
 
$
47.89

 
 
 
 
Outstanding at September 30, 2017
214

 
$
52.75

 
1.26
 
$
15,679

Outstanding and expected to vest at September 30, 2017
187

 
 
 
1.43
 
$
13,693
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
A summary of RSUs outstanding as of September 30, 2017, and activity during the nine months then ended, is presented below:
 
Shares
(in thousands)
 
Weighted- Average
Grant Date Fair
Value Per Share
 
Weighted-Average
Remaining
Contractual Term
(in years)
 
Aggregate
Intrinsic Value
(in thousands)
Outstanding at January 1, 2017
718

 
$
47.54

 
 
 
 
Granted
554

 
$
60.71

 
 
 
 
Vested
(274
)
 
$
46.33

 
 
 
 
Forfeited
(34
)
 
$
49.90

 
 
 
 
Outstanding at September 30, 2017
964

 
$
55.37

 
3.94
 
$
70,536

Outstanding and expected to vest at September 30, 2017
864

 
 
 
2.02
 
$
63,281