EMPLOYEE STOCK BENEFIT PLANS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Summary of Stock-based Compensation Expense
Total stock-based compensation	$ 9,404	$ 7,965	$ 28,372	$ 24,104
Income tax effect	(3,069)	(2,993)	(9,619)	(9,058)
After-tax effect of stock-based compensation expense	6,335	4,972	18,753	15,046
Cost of product revenues
Summary of Stock-based Compensation Expense
Total stock-based compensation	341	120	610	374
Research and development expense
Summary of Stock-based Compensation Expense
Total stock-based compensation	3,116	2,816	9,835	8,583
Selling, general and administrative expense
Summary of Stock-based Compensation Expense
Total stock-based compensation	$ 5,947	$ 5,029	$ 17,927	$ 15,147