SHARE INCENTIVE PLANS: (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based compensation expense
Total share-based compensation expense	$ 35,019,000	$ 21,412,000	$ 14,101,000
Total unrecognized share-based compensation costs related to non-vested awards	84,400,000
Expected to be recognized over a weighted average period	2 years 8 months 26 days
Share options
Share-based compensation expense
Total share-based compensation expense	14,104,000	12,568,000	11,017,000
Employee Share Purchase Plan
Share-based compensation expense
Total share-based compensation expense	2,851,000	1,686,000	1,053,000
Restricted Stock
Share-based compensation expense
Total share-based compensation expense	18,064,000	7,158,000	2,031,000
Cost of goods sold
Share-based compensation expense
Total share-based compensation expense	1,621,000	980,000	385,000
Research and development expense
Share-based compensation expense
Total share-based compensation expense	19,356,000	11,906,000	8,031,000
Sales and marketing expense
Share-based compensation expense
Total share-based compensation expense	8,055,000	4,894,000	2,730,000
General and administrative expense
Share-based compensation expense
Total share-based compensation expense	$ 5,987,000	$ 3,632,000	$ 2,955,000