SHAREHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Summary of Stock Option Activity

A summary of employees and directors option activity under the Company's Stock Option Plans as of December 31, 2015 is as follows:

	Number of options			Weighted-average exercise price		Weighted- average remaining contractual term  (in years)		Aggregate intrinsic value
Outstanding at January 1, 2015		4,702,920			15.54		3.22		30,474
Granted		1,562,000			18.96
Exercised		(600,393	)		14.57
Expired		(160,000	)		16.92
Forfeited		(302,866	)		17.76
Outstanding at December 31, 2015		5,201,661			16.51		3.06		2,748
Exercisable at December 31, 2015		1,791,130			15.32		1.91		1,578
Vested and expected to vest at December 31, 2015		4,878,629			16.44		2.99		2,655

Summary of Stock Options Outstanding by Exercise Price Range

The options outstanding under the Company's Stock Option Plans as of December 31, 2015 have been separated into ranges of exercise price as follows:

Outstanding							Exercisable
			Weighted
			average		Weighted				Weighted
Ranges of			remaining		average				average
exercise	Number of		contractual		exercise		Number of		exercise
price	options		life (years)		price		options		price
$12.18-14.74		1,861,208		2.98		13.91		863,792		13.56
$15.09-19.30		2,557,703		2.67		16.69		927,338		16.96
$20.62-23.66		782,750		4.53		22.10		-		-
		5,201,661						1,791,130

Summary of RSU Activity

The following table summarizes information relating to RSUs, as well as changes to such awards during 2015:

	Year ended December 31,
	2015
	Number in thousands
Outstanding at January 1, 2015		462,354
Granted		536,395
Vested		(76,729	)
Forfeited		(103,656	)
Outstanding as of December 31, 2015		818,364

Summary of Stock-Based Compensation Expense

Stock-based compensation was recorded in the following items within the consolidated statements of income:

	Year ended December 31,
	2013		2014		2015
Cost of sales	$	53	$	79	$	141
Research and development		1,562		1,421		2,456
Selling and marketing		2,552		2,950		4,098
General and administrative		1,207		2,932		2,634
Total expenses	$	5,374	$	7,382	$	9,329