Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation (Details 1)

v2.4.0.6
Equity-Based Compensation (Details 1) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Summary of option activity under stock plans    
Number of options Outstanding, Beginning balance 16,814,521  
Number of options, Granted 2,279,500  
Number of options, Exercised (1,019,967)  
Number of options, Forfeited (327,750)  
Number of options, Expired (4,500)  
Number of options Outstanding, Ending balance 17,741,804 16,814,521
Vested and expected to vest, Number of options 15,106,165  
Exercisable, Number of options 11,513,890  
Weighted Average Exercise Price, Beginning balance $ 2.64  
Weighted Average Exercise Price, Granted $ 4.59  
Weighted Average Exercise Price, Exercised $ 2.19  
Weighted Average Exercise Price, Forfeited $ 3.36  
Weighted Average Exercise Price, Expired $ 2.41  
Weighted Average Exercise Price, Ending balance $ 2.90 $ 2.64
Vested and expected to vest, Weighted Average Exercise Price $ 2.85  
Exercisable, Weighted Average Exercise Price $ 2.48  
Weighted average remaining contractual term, Outstanding, Beginning balance 3 years 9 months 18 days 4 years 3 months 18 days
Weighted average remaining contractual term, Outstanding, Ending balance 3 years 9 months 18 days 4 years 3 months 18 days
Weighted average remaining contractual term, Vested and expected to vest 3 years 9 months 18 days  
Weighted average remaining contractual term, Exercisable 2 years 10 months 24 days  
Aggregate intrinsic value, Outstanding, Beginning balance $ 38,092  
Aggregate intrinsic value, Outstanding, Ending balance 34,227 38,092
Aggregate intrinsic value, Vested and expected to vest 29,973  
Exercisable, Aggregate intrinsic value $ 27,080