v2.4.0.8
Stockholders' Equity (Details) (USD $)
12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Stock Options [Member]
Dec. 31, 2012
Stock Options [Member]
Dec. 31, 2011
Stock Options [Member]
Dec. 31, 2013
Employee Stock [Member]
Dec. 31, 2012
Employee Stock [Member]
Dec. 31, 2013
Stock Options and Restricted Stock Units, Outstanding [Member]
Dec. 31, 2013
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants [Member]
Dec. 31, 2013
Reserved for Future ESPP Issuances [Member]
Dec. 31, 2013
Stock Plans 2000, 2008 and 2009 [Member]
Dec. 31, 2000
Stock Plan, 2000 [Member]
Dec. 31, 2000
Stock Plan, 2000 [Member]
Stock Options, Nonqualifying [Member]
Jan. 28, 2008
Stock Plan, 2008 [Member]
Nov. 17, 2009
Stock Plan, 2009 [Member]
Stock Options [Member]
Dec. 31, 2000
Individual Owning 10 Percent or More of Stock [Member]
Stock Plan, 2000 [Member]
Dec. 31, 2011
Individual Owning 10 Percent or More of Stock [Member]
Stock Plan, 2000 [Member]
Stock Options, Nonqualifying [Member]
Jan. 28, 2008
Individual Owning 10 Percent or More of Stock [Member]
Stock Plan, 2008 [Member]
Nov. 17, 2009
Individual Owning 10 Percent or More of Stock [Member]
Stock Plan, 2009 [Member]
Stock Options [Member]
Jan. 28, 2008
Employee [Member]
Stock Plan, 2008 [Member]
Nov. 17, 2009
Employee [Member]
Stock Plan, 2009 [Member]
Stock Options [Member]
Jan. 28, 2008
Directors and Other Service Providers [Member]
Stock Plan, 2008 [Member]
Stock Options, Nonqualifying [Member]
Nov. 17, 2009
Directors and Other Service Providers [Member]
Stock Plan, 2009 [Member]
Stock Options, Nonqualifying [Member]
Dec. 31, 2000
Individual Owning 10 Percent or Less of Stock [Member]
Stock Plan, 2000 [Member]
Stock Options, Nonqualifying [Member]
Nov. 17, 2009
Individual Owning 10 Percent or Less of Stock [Member]
Stock Plan, 2009 [Member]
Stock Options [Member]
Jan. 02, 2011
Share-based Compensation Award Authorized Number Changes, Lesser of Fixed Amount of Shares [Member]
Stock Plan, 2009 [Member]
Stock Options [Member]
Jan. 02, 2011
Share-based Compensation Award Authorized Number Changes, Lesser of Outstanding Shares on Last Day of Preceeding Year [Member]
Stock Plan, 2009 [Member]
Stock Options [Member]
Dec. 31, 2011
Minimum [Member]
Stock Options [Member]
Dec. 31, 2011
Maximum [Member]
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value                                                         
Number of shares authorized         6,750,770           21,500,000   5,000,000 21,000,000                            
Percent of market price for non-statutory options                       85.00%     110.00%   110.00% 110.00% 100.00% 100.00% 100.00% 100.00%            
Minimum stock ownership percent triggering early award expiration                             10.00%   10.00% 10.00%                    
Award expiration period                               5 years   5 years         10 years 7 years        
Award vesting period                       4 years                       4 years        
Number of shares authorized before adjustments                           9,000,000                            
Number of shares authorized, maximum                                                 7,000,000      
Increase to number of shares authorized, maximum, percent                                                   5.00%    
Maximum stock ownership percent triggering early award expiration                                               10.00%        
Common stock reserved for future issuances 53,883,000           19,720,000 27,412,000 6,751,000 47,131,910                                    
Maximum employee subscription rate           15.00%                                            
Purchase price of common stock as percentage of lower of fair market value of common stock on first day of offering period or last day of purchase period           85.00%                                            
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                                                        
Expected term in years   4 years 7 months 6 days 4 years 7 months 6 days                                               4 years 1 month 6 days 4 years 7 months 6 days
Volatility, minimum   45.00% 46.00% 40.00%                                                
Volatility, maximum   48.00% 52.00% 47.00%                                                
Risk-free interest rate (%)   1.20%                                                    
Risk-free interest rate, minimum     0.70% 0.60%                                                
Risk-free interest rate, maximum     0.90% 2.00%                                                
Dividend rate (%)   0.00% 0.00% 0.00%                                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]                                                        
Balance - Beginning (in shares)   18,571,000 21,389,000 22,489,000                                                
Granted (in shares)   (258,000) (3,401,000) (6,526,000)                                                
Forfeited (in shares)   (820,000) (1,441,000) (1,397,000)                                                
Exercised (in shares)   (2,488,000) (4,778,000) (6,229,000)                                                
Balance - Ending (in shares)   15,521,000 18,571,000 21,389,000                                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]                                                        
Balance - Beginning (in dollars per share)   $ 12.40 $ 9.14 $ 4.21                                                
Granted (in dollars per share)   $ 20.89 $ 26.38 $ 21.05                                                
Forfeited (in dollars per share)   $ 22.14 $ 19.31 $ 11.79                                                
Exercised (in dollars per share)   $ 5.18 $ 5.69 $ 3.21                                                
Balance - Ending (in dollars per share)   $ 13.18 $ 12.40 $ 9.14                                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]                                                        
Options vested and expected to vest, Outstanding (in shares)   15,496,000                                                    
Options vested and expected to vest, Weighted average exercise price (in dollars per share)   $ 13.17                                                    
Options vested and expected to vest, Weighted average remaining contractual life (in years)   3 years 2 months 28 days                                                    
Options vested and expected to vest, Aggregate intrinsic value   120,178,000                                                    
Options exercisable, Outstanding (in shares)   12,084,000                                                    
Options exercisable, Weighted average exercise price (in dollars per share)   $ 10.52                                                    
Options exercisable, Weighted average remaining contractual life (in years)   2 years 9 months 24 days                                                    
Options exercisable, Aggregate intrinsic value   118,226,000                                                    
Compensation cost not yet recognized   39,500,000                                                    
Compensation cost not yet recognized period of recognition   1 year 9 months 18 days                                                    
Weighted-average fair value per share granted   $ 8.42 $ 11.13 $ 8.10                                                
Intrinsic value of options exercised   41,484,000 92,323,000 113,590,000                                                
Total fair value of awards vested   $ 26,411,000 $ 25,350,000 $ 11,800,000