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SIGNIFICANT ACCOUNTING POLICIES (Intangible assets useful lives) (Details) | 12 Months Ended
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Dec. 31, 2017
Customer contracts and customer relationships | Minimum |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 7 years
Customer contracts and customer relationships | Maximum |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 20 years
License agreements | Minimum |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 7 years
License agreements | Maximum |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 10 years
Computer software | Minimum |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 4 years
Computer software | Maximum |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 7 years
Trademarks |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 5 years
Non-compete agreements |
Disclosure of detailed information about intangible assets [line items] |
Useful life | 2 years

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- Definition Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period + References No definition available. + Details
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