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SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Annual Depreciation Rates) (Details) | Dec. 31, 2016
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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%
Enterprise Resource Planning systems ("ERP") [Member] |
Significant Accounting Policies [Line Items] |
Depreciation rate | 10.00%
Office furniture and equipment [Member] |
Significant Accounting Policies [Line Items] |
Depreciation rate | 15.00%

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- Definition Depreciation rate + References No definition available. + Details
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Namespace Prefix: | crnt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
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Namespace Prefix: | crnt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |