Maximum employee contribution as percentage of the employee's net income, under the ESPP.

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Percentage rate of the closing price for the shares on the respective offering date used to calculate the option purchase price per shareas related to the employee share option plan.

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Percentage rate of the closing price for the shares on the respective offering date used to calculate the purchase price per share in regards to the employee stock purchase plan.

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No definition available.

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The total number of exercisable options for that are in the money and for which intrinsic value was calculated.

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No definition available.

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The total number of outstanding options for that are in the money and for which intrinsic value was calculated.

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No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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Aggregate number of common shares reserved for future issuance.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash outflow to reacquire common stock during the period.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of stock repurchase plan authorized.

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No definition available.

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Number of shares that have been repurchased during the period and are being held in treasury.

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-Name Regulation S-X (SX)
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SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Apr. 30, 2015	Apr. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of shares repurchased	$ 52,896	$ 15,169	$ 7,902
Share-based compensation expense	$ 9,329	$ 7,382	$ 5,374
Treasury stock, at cost [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of shares, authorized amount					$ 40,000	$ 40,000
Share capital [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares repurchased	2,824,772	887,855	536,557
February 2010 Addendum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee share option plan, optioon purchase price as a percentage of market price	90.00%
2010 Share Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	2,000,000
Shares available for future grant	1,744,440
ESPP, purchase price as a percentage of market price				90.00%
Maximum employee contribution as a percentage of net income				10.00%
Stock Option Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	5 years 2 months 12 days
Ordinary shares reserved for future issuance	26,301,748
Shares available for future grant	466,926
In-the-money options outstanding	2,581,163
In-the-money options exercisable	1,035,702
Weighted-average grant-date fair value of options granted	$ 5.29	$ 5.42	$ 5.02
Total unrecognized compensation costs	$ 9,866
Unrecognized compensation costs, period of recognition	1 year 7 months 6 days
Total fair value of vested options	$ 9,696
Stock Option Plans [Member] \| February 2010 Addendum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ordinary shares reserved for future issuance	1,000,000
Shares available for future grant	763,306
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Total unrecognized compensation costs	$ 10,600
Unrecognized compensation costs, period of recognition	1 year 9 months
Weighted average fair value at grant date of non-vested shares	$ 18.36