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COMMON SHARES AND TREASURY SHARES - Additional Information (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
item
$ / shares
Vote
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
COMMON SHARES AND TREASURY SHARES        
Share capital $ 747,000 $ 742,000    
Number of votes in share capital | Vote 350,000,000      
Maximum portion of aggregate issued and outstanding shares for holding rights as per written notification 0.33      
Number of days elapsed from written notice of Board of Directors receipt 5 days      
Minimum number of board members confirming written notice | item 0.66      
Total consideration for the treasury shares $ 0 $ 0 $ 0  
Number of treasury shares held | shares 312,871 312,871 312,871 312,900
Nominal value per treasury share 0.01 0.01 0.01  
Nominal value of treasury shares held $ 3,100 $ 3,100 $ 3,100 $ 3,100
Market value of treasury shares held $ 3,500,000 $ 2,100,000 $ 2,700,000