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PROPERTY AND EQUIPMENT, NET (Schedule of Property And Equipment, Net) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 80,182,000us-gaap_PropertyPlantAndEquipmentGross $ 81,677,000us-gaap_PropertyPlantAndEquipmentGross  
Less - accumulated depreciation and amortization (48,274,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment [1] (49,131,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment [1]  
Property and equipment, net 31,908,000us-gaap_PropertyPlantAndEquipmentNet 32,546,000us-gaap_PropertyPlantAndEquipmentNet 34,156,000us-gaap_PropertyPlantAndEquipmentNet
Operating equipment, amount subject to lease transactions 26,000,000itrn_OperatingEquipmentAmountSubjectToLeaseTransactions 25,800,000itrn_OperatingEquipmentAmountSubjectToLeaseTransactions  
Accumulated depreciation and amortization subject to lease transactions 10,400,000itrn_AccumulatedDepreciationAndAmortizationSubjectToLeaseTransactions 11,300,000itrn_AccumulatedDepreciationAndAmortizationSubjectToLeaseTransactions  
Operating Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 46,947,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember		 [2] 46,991,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember		 [2]  
Office Furniture, Equipment, And Computers [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 23,858,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeEquipmentMember		 25,116,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeEquipmentMember		  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 1,022,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember		 1,022,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember		  
Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 1,855,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember		 2,252,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember		  
Vehicles [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 3,412,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_VehiclesMember		 3,197,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_VehiclesMember		  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 3,088,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember		 $ 3,099,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember		  
[1] As at December 31, 2014 and 2013, an amount of US$ 10.4 million and US$ 11.3 million is subject to operating lease transactions, respectively.
[2] As December 31, 2014 and 2013, an amount of US$ 26.0 million and US$ 25.8 million is subject to operating lease transactions, respectively.