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Stockholders' Equity (Details 3) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Share-based compensation expense related to outstanding awards        
Share-based compensation expense     $ 40,568,000 $ (37,790,000)
Stock Options
       
Share-based compensation expense related to outstanding awards        
Share-based compensation expense before taxes 4,042,000 8,000 6,371,000 511,000
Related income tax benefit (1,480,000) (3,000) (2,333,000) (189,000)
Share-based compensation expense (benefit), net of taxes 2,562,000 5,000 4,038,000 322,000
Share-based compensation capitalized as part of inventory       15,000
Employee Stock Purchase Plan (ESPP)
       
Share-based compensation expense related to outstanding awards        
Offering period 6 months      
Maximum percentage of compensation employees may contribute for purchase of common stock under the ESPP 15.00%      
Percentage of the lower of the fair market value of common stock on the first or last trading-day of a given offering period 85.00%      
Maximum number of shares of common stock each eligible employees may purchase in any given offering period 4,000      
Term of employee stock purchase plan 20 years      
Maximum number of shares authorized to be issued Aggregate number of shares authorized to be issued 3,000,000   3,000,000  
Share-based compensation expense 60,000   60,000  
Method and assumptions on valuation of stock options        
Expected volatility (as a percent)     29.00%  
Risk-free interest rate (as a percent)     0.10%  
Expected term (in years)     6 months  
Expected dividend yield (as a percent)     0.00%  
Expected forfeiture rate (as a percent)     4.60%  
Research and development | Stock Options
       
Share-based compensation expense related to outstanding awards        
Share-based compensation expense before taxes   3,000   196,000
Selling, general and administrative | Stock Options
       
Share-based compensation expense related to outstanding awards        
Share-based compensation expense before taxes $ 4,042,000 $ 5,000 $ 6,371,000 $ 315,000