Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Details 2)

v2.4.0.6
Stock-Based Compensation (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Summary of option activity      
Shares Outstanding, Beginning 4,863,718 4,998,337 3,285,579
Shares, Granted 738,915 486,833 2,049,461
Shares, Exercised (298,947) (447,528) (296,188)
Shares, Forfeited (26,274) (173,924) (40,515)
Shares, Options exercisable 3,378,591    
Shares Outstanding, Ending 5,277,412 4,863,718 4,998,337
Weighted-Average Exercise Price, Outstanding, Beginning $ 8.19 $ 7.64 $ 6.70
Weighted-Average Exercise Price, Granted $ 12.53 $ 12.37 $ 9.18
Weighted-Average Exercise Price, Exercised $ 6.92 $ 6.14 $ 6.50
Weighted-Average Exercise Price, Forfeited $ 11.03 $ 9.36 $ 7.81
Weighted-Average Exercise Price, Options exercisable $ 7.70    
Weighted-Average Exercise Price, Outstanding, Ending $ 8.86 $ 8.19 $ 7.64
Weighted-Average Remaining Contractual Life (Years), Outstanding 6 years 3 months 18 days 6 years 9 months 18 days 7 years 6 months
Weighted-Average Remaining Contractual Life (Years), Exercisable 5 years 2 months 12 days    
Aggregate Intrinsic Value, Outstanding $ 26,885 $ 18,704 $ 47,083
Aggregate Intrinsic Value, Options exercisable $ 21,124