v2.4.0.8
Stock-Based Compensation (Details 5) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock-Based Compensation      
Allocated share-based compensation expense $ 18,353 $ 14,585 $ 16,064
Research and development expenses
     
Stock-Based Compensation      
Allocated share-based compensation expense 3,478 2,755 2,411
Selling, general and administrative expenses
     
Stock-Based Compensation      
Allocated share-based compensation expense 14,875 11,830 13,653
Non-Performance Based Stock Awards
     
Stock-Based Compensation      
Unrecognized compensation expense $ 36,100    
Future forfeiture rate (as a percent) 2.00%    
Period for recognition of compensation cost 2 years