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Significant Accounting Policies (Schedule Of Annual Depreciation Rates) (Details)	Dec. 31, 2012
Computers, Manufacturing And Peripheral Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Depreciation rate	6.00%
Computers, Manufacturing And Peripheral Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Depreciation rate	33.00%
Other Furniture And Equipment [Member]
Significant Accounting Policies [Line Items]
Depreciation rate	7.00%

X

- Definition

Depreciation rate

+ References

No definition available.

+ Details

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

X

- Details

Name:	crnt_SignificantAccountingPoliciesLineItems
Namespace Prefix:	crnt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration