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DERIVATIVE INSTRUMENTS (Schedule Of Derivative Instruments) (Statement of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in Statements of Comprehensive loss	$ (256)
Gain (loss) recognized in consolidated statements of operations	(191)	$ 815	$ (735)
Foreign Exchange Option And Forward Contract [Member] | Derivatives designated as hedging instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in Statements of Comprehensive loss	(256)
Foreign Exchange Option And Forward Contract [Member] | Derivatives designated as hedging instruments [Member] | Operating Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in consolidated statements of operations	261	110	(495)
Foreign exchange forward contracts [Member] | Derivatives not designated as hedging instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in Statements of Comprehensive loss
Foreign exchange forward contracts [Member] | Derivatives not designated as hedging instruments [Member] | Financial Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in consolidated statements of operations	$ (452)	$ 705	$ (240)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

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