Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation (Tables)

v3.8.0.1
Equity-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Options
We apply the following assumptions in our Black-Scholes-Merton Model option-pricing formula:
 
Year Ended
December 31,
2017
 
Year Ended
December 31,
2016
 
Year Ended
December 31,
2015
Expected term (in years)
3.0 - 10.0
 
1.0 - 10.0
 
1.0 - 10.0
Risk-free interest rate
1.32% - 2.41%
 
0.71% - 2.51%
 
0.26% - 2.42%
Expected volatility
38% - 55%
 
38% - 64%
 
32% - 64%
Expected dividend yield
0%
 
0%
 
0%
Summary of Option Activity Under Stock Plans
A summary of option activity under our stock option plans as of December 31, 2017, and the changes during the year is presented below: 
Options
Number of
options
 
Weighted
average
exercise
price
 
Weighted
average
remaining
contractual
term (years)
 
Aggregate
intrinsic value
(in thousands)
Outstanding at December 31, 2016
34,640,514

 
$
10.18

 
6.79
 
$
32,984

Granted
2,131,500

 
$
7.50

 
 
 
 
Exercised
(1,298,704
)
 
$
3.01

 
 
 
 
Forfeited
(2,735,813
)
 
$
11.75

 
 
 
 
Expired
(1,438,112
)
 
$
11.84

 
 
 
 
Outstanding at December 31, 2017
31,299,385

 
$
10.08

 
6.37
 
$
1,886

Vested and expected to vest at December 31, 2017
29,484,888

 
$
10.04

 
6.27
 
$
1,886

Exercisable at December 31, 2017
18,697,466

 
$
9.59

 
5.26
 
$
1,886