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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Depreciation Rates) (Details) | 12 Months Ended
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Dec. 31, 2017
Operating equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 6.50%
Operating equipment [Member] | Minimum [Member] | Majority [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 20.00%
Operating equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 33.00%
Operating equipment [Member] | Maximum [Member] | Majority [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 33.00%
Office furniture, equipment and computers [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 7.00%
Office furniture, equipment and computers [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 33.00%
Building [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 2.50%
Vehicles [Member] |
Property, Plant and Equipment [Line Items] |
Rate of depreciation | 15.00%
Leasehold Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Description of depreciation method | Duration of the lease which is less or equal to useful life.

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- Definition The depreciation rate for property plant and equipment. + References No definition available. + Details
Name: | itrn_RateOfDepreciation
Namespace Prefix: | itrn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Additional information disclosed pertaining to property, plant and equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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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Period Type: |

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- Details
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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
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |