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INVESTMENTS IN AFFILIATED AND OTHER COMPANIES (Narrative) (Details) ₪ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2018 USD ($) | Mar. 31, 2018 ILS (₪) | Jul. 31, 2015 USD ($) | Jan. 31, 2015 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Oct. 31, 2017 | Oct. 31, 2015 | Mar. 31, 2015 | Feb. 28, 2015
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in other company |  |  |  |  |  |  | $ 2,772 | $ 1,382 |  |  |  |  |
Share in gains (losses) of affiliated companies, net |  |  |  |  |  |  | 4,219 | 8,520 | $ (449) |  |  |  |
Gain from measurement of previously held interests at acquisition date fair value | [1] |  |  |  |  |  | $ 14,677 |  |  |  |  |  |
BRINGG Delivery Technologies Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, equity method |  |  |  |  |  |  | 46.00% |  |  |  |  |  |
Payments to equity interest |  |  |  | $ 2,000 | $ 1,100 | $ 1,400 |  |  |  |  |  |  |
BRINGG Delivery Technologies Ltd [Member] | Series A Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in equity | shares |  |  |  |  |  |  | 1,200,000 |  |  |  |  |  |
Ituran Road Track Monitoramen to De Veiculos Ltd a [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, equity method |  |  |  |  |  |  |  |  |  |  |  |  | 50.00%
RTI URUGUAY S.A. ("RTI") [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, equity method |  |  |  |  |  |  |  |  |  |  |  | 50.00% |
ITURAN ROAD TRACK ARGENTINA S.A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, equity method |  |  |  |  |  |  |  |  |  |  | 50.00% |  |
GLOBAL TELEMATIC SOLUTIONS HK, LIMITED ("HK') [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, equity method |  |  |  |  |  |  |  |  |  | 50.00% |  |  |
Locationet [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, equity method |  |  |  |  |  |  | 100.00% | 19.15% |  |  |  |  |
Payments to equity interest |  | $ 340 |  |  |  |  |  |  |  |  |  |  |
Investments in other company |  |  |  |  |  |  | $ 2,800 |  |  |  |  |  |
Locationet [Member] | NIS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to equity interest | ₪ |  |  | ₪ 1,200 |  |  |  |  |  |  |  |  |  |
[1] | As a result of the acquisition described in Notes 1A, 3 the company gained control over certain companies (see Note 4.2) that previously were accounted under the equity method (JV's)and started to consolidate their financial statements. The company recorded one time gain in the amount of approximately $14.7 million from measurement of the JV's at the acquisition date to fair value.

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