STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE SHARE-BASED COMPENSATION EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 3,655	$ 3,163	$ 10,943	$ 9,436
Costs of product sales [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	658	687	1,891	1,884
Research and development [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	507	599	1,430	1,743
Selling, general and administrative [Member]
Recognized share-based compensation expense [Abstract]
Total stock-based compensation expense	$ 2,490	$ 1,877	$ 7,622	$ 5,809