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EMPLOYEE BENEFIT PLANS (Details Narrative)
 12 Months Ended
Dec. 31, 2020
USD ($)
Number
Dec. 31, 2019
USD ($)
Number
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Number
Dec. 31, 2015
USD ($)
Dec. 31, 2006
USD ($)
Number
Defined Benefit Plan Disclosure [Line Items]            
Plan Expense $ 552,000,000 $ 528,000,000 $ 484,000,000      
Employer match of employee contributions of first 3% of eligible compensation (as a percent) 100.00%          
Percentage of eligible compensation, matched 100% by employer 3.00%          
Employer match of employee contributions of next 2% of eligible compensation (as a percent) 50.00%          
Percentage of eligible compensation, matched 50% by employer 2.00%          
Key Individuals [Member] | Salary Continuation Plan [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Number of individuals covered under the plan | Number 2          
Requisite age of individuals to be covered under the plan 63 years          
Monthly benefits $ 2,500          
Period for which monthly benefits are provided 17 years          
Additional Key Officers [Member] | Salary Continuation Plan [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Number of individuals covered under the plan | Number   2   2   6
Period for which monthly benefits are provided   15 years   15 years 15 years 15 years
Additional single premium life insurance policies purchased   $ 1,600   $ 1,500 $ 5,200 $ 3,500