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STAFF COSTS (Detail Textuals 1) - kr / shares
1 Months Ended 12 Months Ended
Jan. 31, 2017
Dec. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Vesting period of RSUs   3 years
Exercise period of RSUs   6 months
Long term incentive plan    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Exercise price of RSUs   kr 93.5
Long term incentive plan | Chief executive officer    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Vesting period of RSUs 5 years 5 years
Exercise period of RSUs   12 months