SHARE INCENTIVE PLANS: (Tables)

3 Months Ended

Mar. 31, 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 granted	—		—
Options exercised	(71,214	)	17.60
Options cancelled	(16,105	)	75.38
Outstanding at March 31, 2015	2,380,204		$	29.59

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	870,003		45.89
Restricted share units vested	(175,613	)	39.75
Restricted share units canceled	(28,101	)	42.76
Non vested restricted share units at March 31, 2015	2,577,455		$	43.17

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

	Number  of  Shares
Share options outstanding	2,380,204
Restricted share units outstanding	2,577,455
Shares authorized for future issuance	1,652,472
ESPP shares available for future issuance	686,486
Total shares reserved for future issuance as of March 31, 2015	7,296,617

Schedule of weighted average assumptions used to value share options granted

	Employee Share  Options		Employee Share  Purchase Plan
	Three Months Ended March 31,		Three Months Ended March 31,
	2015 (*)	2014 (*)	2015	2014
Dividend yield, %	—	—	—	—
Expected volatility, %	—	—	33.72	45.1
Risk free interest rate, %	—	—	0.12	0.08
Expected life, years	—	—	0.50	0.50
Estimated forfeiture rate, %	—	—	—	—

(*)There were no share options granted during the three months ended March 31, 2015 and 2014.

Summary of the distribution of total share-based compensation expense

	Three Months Ended  March 31,
	2015		2014
	(in thousands)
Cost of goods sold	$	547	$	522
Research and development	6,768		6,678
Sales and marketing	2,394		2,433
General and administrative	2,009		2,005
Total share-based compensation expense	$	11,718	$	11,638