v2.4.0.6
Stockholders Equity and Stock-Based Compensation Stock Option Activity (Details) (Stock Options [Member], USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Stock Options [Member]
    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options, Outstanding, Number 8,864,956 17,870,713
Options, Exercises in Period (8,334,131)  
Options, Forfeited (657,333)  
Options, Expirations in Period (14,293)  
Options, Exercisable, Number 4,982,867  
Options, Outstanding, Weighted Average Exercise Price $ 1.07 $ 1.12
Options, Exercises in Period, Weighted Average Exercise Price $ 1.06  
Options, Forfeitures in Period, Weighted Average Exercise Price $ 2.34  
Options, Expirations in Period, Weighted Average Exercise Price $ 1.78  
Exercisable Options, Weighted Average Exercise Price $ 0.82  
Options, Outstanding, Weighted Average Remaining Contractual Term 7 years 2 months 29 days 8 years 0 months 22 days
Options, Exercisable, Weighted Average Remaining Contractual Term 6 years 11 months 4 days  
Options, Outstanding, Intrinsic Value $ 32,752 [1] $ 348,743 [1]
Options, Exercisable, Intrinsic Value $ 19,645 [1]  
[1] The aggregate intrinsic value of options outstanding and exercisable represents the total pretax intrinsic value (the difference between the fair value of the Company's stock on the last day of each period and the exercise price, multiplied by the number of options where the exercise price exceeds the fair value) that would have been received by the option holders had all option holders exercised their options as of December 31, 2011 and September 30, 2012, respectively.