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Disclosures on reserves in Equity (Details Textual) - $ / shares
 12 Months Ended
Nov. 20, 2019
Aug. 21, 2019
May 22, 2019
Dec. 31, 2019
Dec. 31, 2018
Apr. 25, 2019
Disclosure of Disclosures on equity [Line Items]            
Dividend payable per share           $ 1.67111
interim dividend per share $ 0.22987   $ 0.30598      
Provisional dividend paid, Per share   $ 0.26669     $ 1.25837  
Maximum Threshold Percentage Of Issued Capital For Issuance Of Series B shares       50.00%    
Minimum Percentage Required TO Call Ordinary Or Extraordinary Meeting       5.00%    
Number Of Consecutive Limitation Period Of Series B shares       50 years    
Discount rate       4.00%    
Percentage Of Net Income       50.00%    
Series A preferred shares [Member]            
Disclosure of Disclosures on equity [Line Items]            
Number of shares issued and fully paid       142,819,552 142,819,552  
Series B preferred shares [Member]            
Disclosure of Disclosures on equity [Line Items]            
Number of shares issued and fully paid       120,376,972 120,376,972  
Bottom of range [member]            
Disclosure of Disclosures on equity [Line Items]            
Cash dividend rate       30.00%