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SELECTED STATEMENTS OF OPERATIONS DATA (Schedule Of Net income per share) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Numerator: |  |  |
Numerator for basic and diluted net income per share - income available to shareholders of Ordinary shares | $ 15,560 | $ 11,429 | $ 1,011
Denominator: |  |  |
Denominator for basic net income per share - weighted average number of shares | 77,916,912 | 77,702,788 | 77,239,409
Effect of dilutive securities: |  |  |
Employee stock options and RSU | $ 2,025,441 | $ 910,740 | $ 57,272
Denominator for diluted net income per share - adjusted weighted average number of shares | 79,942,353 | 78,613,528 | 77,296,681

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