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DERIVATIVE INSTRUMENTS (Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Derivatives instruments | $ 1,655 | $ 260
Total assets | 1,655 | 260
Fair Value Inputs Level 2 [Member] |  |
Derivatives instruments | 1,655 | 260
Total assets | $ 1,655 | $ 260

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- Definition Assets (Liabilities), Fair Value Disclosure + References No definition available. + Details
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Namespace Prefix: | crnt_
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Balance Type: | debit
Period Type: | instant

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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | instant

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- Details
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Balance Type: |
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