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STAFF COSTS (Detail Textuals 1) - kr / shares
1 Months Ended 12 Months Ended
Jan. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting period of RSUs   3 years    
Key management personnel of entity or parent        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting period of RSUs     3 years  
Long term incentive plan        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Exercise price of RSUs   kr 53.7    
Average remaining contractual life   1 year 1 month 6 days 1 year 3 months 18 days  
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 3 years   5 years
Exercise period of RSUs 12 months