STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE Share-based Compensation Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 3,145	$ 1,835
Costs of product sales [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	537	167
Research and development [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	507	329
Selling, general and administrative [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 2,101	$ 1,339