XML 42 R45.htm IDEA: XBRL DOCUMENT

Share-based Compensation (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Share-Based Compensation
Share-based compensation expense	$ 5,992	$ 4,904
Research and development
Share-Based Compensation
Share-based compensation expense	1,278	1,083
Selling, general and administrative
Share-Based Compensation
Share-based compensation expense	$ 4,714	$ 3,821

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References+ Details