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Nonrecognized Subsequent Event (Details)	Dec. 31, 2014	Feb. 28, 2015
Ceragon Venezuela [Member]
Subsequent Event [Line Items]
Percentage Of Entity Consolidated Total Assets Represented	1.00%crnt_PercentageOfEntityConsolidatedTotalAssetsRepresented / dei_LegalEntityAxis = crnt_CeragonVenezuelaMember
Percentage Of Entity Consolidated Revenues Represented	1.00%crnt_PercentageOfEntityConsolidatedRevenuesRepresented / dei_LegalEntityAxis = crnt_CeragonVenezuelaMember
Percentage Of Entity Consolidated Total Net Loss Represented	15.00%crnt_PercentageOfEntityConsolidatedTotalNetLossRepresented / dei_LegalEntityAxis = crnt_CeragonVenezuelaMember
Subsidiaries Other Than Ceragon Venezuela [Member]
Subsequent Event [Line Items]
Percentage Of Entity Consolidated Total Assets Represented	1.00%crnt_PercentageOfEntityConsolidatedTotalAssetsRepresented / dei_LegalEntityAxis = crnt_SubsidiariesOtherThanCeragonVenezuelaMember
Subsequent Event [Member]
Subsequent Event [Line Items]
Foreign Currency Exchange Rate, Translation		1.700us-gaap_ForeignCurrencyExchangeRateTranslation1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X

- Definition

The percentage of entity''s consolidated revenues represented.

+ References

No definition available.

+ Details

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Namespace Prefix:	crnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage of entity''s consolidated total assets represented.

+ References

No definition available.

+ Details

Name:	crnt_PercentageOfEntityConsolidatedTotalAssetsRepresented
Namespace Prefix:	crnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage of entity''s consolidated net loss represented.

+ References

No definition available.

+ Details

Name:	crnt_PercentageOfEntityConsolidatedTotalNetLossRepresented
Namespace Prefix:	crnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

+ Details

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- Details

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X

- Details

Name:	dei_LegalEntityAxis=crnt_CeragonVenezuelaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=crnt_SubsidiariesOtherThanCeragonVenezuelaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: