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SHAREHOLDERS' EQUITY (Schedule of Intrinsic and Fair Values of Options Exercised) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
The intrinsic value of options exercised	$ 26,031	$ 40,314	$ 15,374
The original fair value of options exercised	$ 7,202	$ 16,711	$ 3,721

X

- Definition

The fair value of options exercised during the period.

+ References

No definition available.

+ Details

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X

- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Period Type:	duration

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- References

No definition available.

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