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DERIVATIVE INSTRUMENTS (Schedule of Fair Value of Derivative Contracts) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Other accounts receivable and prepaid expenses [Member] |  |
Derivative [Line Items] |  |
Total derivatives | $ 1,937 | $ 373
Other accounts payable and accrued expenses [Member] |  |
Derivative [Line Items] |  |
Total derivatives | 281 | 112
Derivatives designated as hedging instruments [Member] | Currency forward contracts [Member] |  |
Derivative [Line Items] |  |
Total derivatives | 35,089 | 29,621
Derivatives designated as hedging instruments [Member] | Currency forward contracts [Member] | Other accounts receivable and prepaid expenses [Member] |  |
Derivative [Line Items] |  |
Total derivatives | 1,847 | 318
Derivatives designated as hedging instruments [Member] | Currency forward contracts [Member] | Other accounts payable and accrued expenses [Member] |  |
Derivative [Line Items] |  |
Total derivatives | 2 |
Derivatives not designated as hedging instruments [Member] | Currency forward and option contracts [Member] |  |
Derivative [Line Items] |  |
Total derivatives | 31,207 | 28,532
Derivatives not designated as hedging instruments [Member] | Currency forward and option contracts [Member] | Other accounts receivable and prepaid expenses [Member] |  |
Derivative [Line Items] |  |
Total derivatives | 90 | 55
Derivatives not designated as hedging instruments [Member] | Currency forward and option contracts [Member] | Other accounts payable and accrued expenses [Member] |  |
Derivative [Line Items] |  |
Total derivatives | $ 279 | $ 112

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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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