XML 35 R24.htm IDEA: XBRL DOCUMENT v3.4.0.3
Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2016
Stock-based Compensation Expense
The stock-based compensation related to all of our stock-based awards and employee stock purchases for the three months ended March 31, 2016 and 2015 is as follows (in thousands): 
 
Three Months Ended
March 31,
 
 
2016
 
2015
 
Cost of net revenues
$
961

 
$
978

 
Selling, general and administrative
9,834

 
8,771

 
Research and development
1,729

 
1,899

 
Total stock-based compensation
$
12,524

 
$
11,648

 
Stock Option Activity
Activity for the three months ended March 31, 2016 under the stock option plans is set forth below (in thousands, except years and per share amounts):
 
Stock Options
Number of Shares
Underlying
Stock Options
 
Weighted
Average
Exercise
Price per Share
 
Weighted  Average
Remaining
Contractual  Term
 
Aggregate
Intrinsic
Value
 
 
 
 
 
(in years )
 
 
Outstanding as of December 31, 2015
496

 
$
15.14

 
 
 
 
Granted

 

 
 
 
 
Exercised
(30
)
 
11.69

 
 
 
 
Cancelled or expired

 

 
 
 
 
Outstanding as of March 31, 2016
466

 
$
15.37

 
1.84
 
$
26,699

Vested and expected to vest at March 31, 2016
466

 
$
15.37

 
1.84
 
$
26,699

Exercisable at March 31, 2016
466

 
$
15.37

 
1.84
 
$
26,699

[1]
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:
 
 
Three Months Ended
March 31,
 
 
 
2016
 
2015
 
Expected term (in years)
 
1.3

 
1.2

 
Expected volatility
 
33.7
%
 
31.9
%
 
Risk-free interest rate
 
0.77
%
 
0.26
%
 
Expected dividends
 

 

 
Weighted average fair value at grant date
 
$
19.96

 
$
15.98

 
Restricted Stock Units (RSUs)  
Summary Of Nonvested Shares
A summary of the RSU activity for the three months ended March 31, 2016 is as follows (in thousands, except years):
 
 
Number of Shares
Underlying RSU
 
Weighted Average Grant Date Fair Value
 
Weighted 
Remaining
Contractual 
Period
 
Aggregate
Intrinsic
 Value
 
 
 
 
 
(in years)
 
 
Nonvested as of December 31, 2015
2,079

 
$
49.45

 
 
 
 
Granted
558

 
63.75

 
 
 
 
Vested and released
(646
)
 
44.27

 
 
 
 
Forfeited
(61
)
 
50.48

 
 
 
 
Nonvested as of March 31, 2016
1,930

 
$
55.29

 
1.67
 
$
140,321

Market Performance Based Restricted Stock Units  
Summary Of Nonvested Shares
The following table summarizes the MSU activity for the three months ended March 31, 2016 (in thousands, except years): 
 
Number of Shares
Underlying MSU
 
Weighted Average Grant Date Fair Value
 
Weighted Average
Remaining
Contractual Period
 
Aggregate
Intrinsic 
Value
 
 
 
 
 
(in years )
 
 
Nonvested as of December 31, 2015
611

 
$
51.41

 
 
 
 
Granted
215

 
55.79

 
 
 
 
Vested and released
(253
)
 
35.49

 
 
 
 
Forfeited
(25
)
 
53.70

 
 
 
 
Nonvested as of March 31, 2016
548

 
$
60.35

 
1.84
 
$
39,852

[1] There were no stock options granted during the three months ended March 31, 2016 and 2015. All compensation costs relating to stock options have been recognized as of March 31, 2016.