SHARE- BASED COMPENSATION (Schedule of Assumptions Used to Value Options) (Details)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of terms and conditions of share-based payment arrangement [line items]
Dividend yield (%)
Bottom of range [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected volatility of the share prices (%)	42.00%	45.00%	48.00%
Risk-free interest rate (%)	1.89%	1.87%	1.80%
Suboptimal factor	1.8	1.8	1.8
Post-vesting forfeiture rate (%)	5.00%	5.00%	5.00%
Top of range [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expected volatility of the share prices (%)	43.00%	54.00%	51.00%
Risk-free interest rate (%)	2.42%	2.35%	2.70%
Suboptimal factor	2	2	2
Post-vesting forfeiture rate (%)	10.00%	10.00%	10.00%

The percentage of an expected forfeiture rate used to calculate the fair value of share options granted.

No definition available.

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- Definition

Suboptimal factor

+ References

No definition available.

+ Details

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- Definition

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2017-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard
-URIDate 2017-03-09

+ Details

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- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

+ References

+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The percentage of an expected dividend used to calculate the fair value of share options granted.

+ References

+ Details

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