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SHAREHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Schedule of Assumptions Used to Determine Fair Value of Options Granted

The fair value of the Company's stock options granted to employees and directors for the years ended December 31, 2018, 2017 and 2016 was estimated using the following assumptions:

		2018				2017				2016
Expected volatility			21.23%-21.83%				21.69%-22.90%				21.05%-25.92%
Risk free interest rate			2.42%-3.04%				1.53%-2.00%				0.58%-2.04%
Expected dividend			-				-				0%-1.00%
Expected term (in years)			3.5				3.5				3.5

Schedule of Stock Option Activity

A summary of the Company's stock options activity and related information for the year ended December 31, 2018, is as follows:

		Number of options				Weighted-average exercise price				Weighted- average remaining contractual term (in years)				Aggregate intrinsic value
Outstanding at January 1, 2018			1,676,130				23.07				4.45				115,390
Granted			308,884				15.94
Exercised			(661,379	)			28.55
Cancelled			(1,924	)			22.76
Forfeited			(136,864	)			7.22
Outstanding at December 31, 2018			1,184,847				19.82				4.47				104,731
Exercisable at December 31, 2018			410,237				36.24				3.63				29,523

Schedule of Options Outstanding by Exercise Price Range

The options outstanding under the Company's stock option plans as of December 31, 2018 have been separated into ranges of exercise price as follows:

																				Weighted
				Options				Weighted								Options				average
				outstanding				average				Weighted				Exercisable				exercise
				as of				remaining				Average				as of				price of
Ranges of				December 31,				contractual				Exercise				December 31,				options
exercise price				2018				term				Price				2018				exercisable
								(Years)				$								$
$	0.27				806,066				4.50				0.27				163,219				0.27
$	0.69-9.89				5,072				4.95				7.08				4,775				7.11
$	11.40-15.16				957				1.32				12.63				957				12.63
$	17.72				346				2.19				17.72				346				17.72
$	35.62-49.72				156,319				4.60				41.50				93,581				40.74
$	54.95-80.76				153,648				3.79				70.73				122,896				70.24
$	85.14-96.74				62,439				5.36				93.77				24,463				95.14
					1,184,847				4.47				19.82				410,237				36.24

Schedule of Restricted Stock Units Activity

A summary of the Company's RSU and the Company's RSA activities and related information for the year ended December 31, 2018, is as follows:

		Number of RSU and RSA (*)
Outstanding at January 1, 2018			1,525,012
Granted			857,067
Vested			(453,904	)
Cancelled			(797	)
Forfeited			(168,308	)
Outstanding at December 31, 2018			1,759,070

(*) NIS 1 par value which represents approximately $0.27

Schedule of Allocated Share-Based Compensation Expense

The total equity-based compensation expense related to all of the Company's equity-based awards, recognized for the years ended December 31, 2018, 2017 and 2016, was comprised as follows:

		Year ended December 31,
		2018				2017				2016
Cost of revenues		$	11,000			$	11,337			$	7,878
Research and development, net			7,363				9,038				5,676
Selling and marketing			27,455				23,107				16,403
General and administrative			21,405				13,498				10,590
Total stock-based compensation expenses		$	67,223			$	56,980			$	40,547

X

- Definition

Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

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