SHARE INCENTIVE PLANS: (Tables)

6 Months Ended

Jun. 30, 2015

SHARE INCENTIVE PLANS:

Summary of share option awards activity under equity incentive plans

	Options Outstanding
	Number of Shares		Weighted Average Exercise Price
Outstanding at December 31, 2014	2,467,523		$	29.55
Options exercised	(256,675	)	15.15
Options cancelled	(32,981	)	74.52
Outstanding at June 30, 2015	2,177,867		$	30.56

Summary of restricted share units activity

	Restricted Share Units Outstanding
	Number of Shares		Weighted Average Grant Date Fair Value
Non vested restricted share units at December 31, 2014	1,911,166		$	41.61
Restricted share units granted	1,072,355		46.15
Restricted share units vested	(485,806	)	46.35
Restricted share units canceled	(62,322	)	42.12
Non vested restricted share units at June 30, 2015	2,435,393		$	44.09

Summary of ordinary shares reserved for future issuance under equity incentive plans

	Number of Shares
Share options outstanding	2,177,867
Restricted share units outstanding	2,435,393
Shares authorized for future issuance	1,501,217
ESPP shares available for future issuance	686,486
Total shares reserved for future issuance at June 30, 2015	6,800,963

Schedule of weighted average assumptions used to value share options granted

	Employee Share Options		Employee Share Purchase Plan
	Six Months Ended June 30,		Six Months Ended June 30,
	2015 *	2014	2015	2014
Dividend yield, %	—	—	—	—
Expected volatility, %	—	56.1	38.1	45.1
Risk free interest rate, %	—	1.98	0.09	0.06
Expected life, years	—	5.77	0.50	0.50
Estimated forfeiture rate, %	—	6.73	—	—

*No options were granted in the six months ended June 30, 2015.

Summary of the distribution of total share-based compensation expense

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
	(In thousands)
Cost of goods sold	$	610	$	532	$	1,157	$	1,054
Research and development	7,553		6,753		14,321		13,431
Sales and marketing	2,750		2,479		5,144		4,912
General and administrative	2,373		2,183		4,382		4,188
Total share-based compensation expense	$	13,286	$	11,947	$	25,004	$	23,585