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26 EMPLOYEE BENEFITS (Details 8)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Plan covering 35% Of The Average Salary [Member] | Male [Member]    
EmployeeBenefitsLineItems [Line Items]    
Average life expectancy of employees (in years) 18.38 18.00
Average life expectancy in years of employees who are 40 (in years) 40.15 40.00
Plan covering 35% Of The Average Salary [Member] | Female [Member]    
EmployeeBenefitsLineItems [Line Items]    
Average life expectancy of employees (in years) 18.38 18.00
Average life expectancy in years of employees who are 40 (in years) 40.15 40.00
Average Salary Supplementation Plan [Member] | Male [Member]    
EmployeeBenefitsLineItems [Line Items]    
Average life expectancy of employees (in years) 18.75 18.74
Average life expectancy in years of employees who are 40 (in years) 40.60 40.60
Average Salary Supplementation Plan [Member] | Female [Member]    
EmployeeBenefitsLineItems [Line Items]    
Average life expectancy of employees (in years) 21.41 22.23
Average life expectancy in years of employees who are 40 (in years) 44.41 45.37
Mixed Supplementary Benefit Plan [Member] | Male [Member]    
EmployeeBenefitsLineItems [Line Items]    
Average life expectancy of employees (in years) 20.45 21.00
Average life expectancy in years of employees who are 40 (in years) 42.70 43.00
Mixed Supplementary Benefit Plan [Member] | Female [Member]    
EmployeeBenefitsLineItems [Line Items]    
Average life expectancy of employees (in years) 23.02 23.00
Average life expectancy in years of employees who are 40 (in years) 46.28 47.00