SHARE INCENTIVE PLANS: (Details 4) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Share-based compensation expense
Total share-based compensation expense	$ 13,286	$ 11,947	$ 25,004	$ 23,585
Total unrecognized share-based compensation costs related to non-vested awards	94,100		$ 94,100		$ 74,500
Weighted average period for recognition of unrecognized share-based compensation costs			2 years 7 days		1 year 11 months 19 days
Cost of goods sold
Share-based compensation expense
Total share-based compensation expense	610	532	$ 1,157	1,054
Research and development
Share-based compensation expense
Total share-based compensation expense	7,553	6,753	14,321	13,431
Sales and marketing
Share-based compensation expense
Total share-based compensation expense	2,750	2,479	5,144	4,912
General and administrative
Share-based compensation expense
Total share-based compensation expense	$ 2,373	$ 2,183	$ 4,382	$ 4,188