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TRANSACTIONS WITH RELATED PARTIES AND AFFILIATES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]      
Commissions and incentives $ 64,254 $ 73,514  
Directors, Officers and Family Members on M5M Foundation Board      
Related Party Transaction [Line Items]      
Cash donations 700 800  
Son of the Chairman of the Board      
Related Party Transaction [Line Items]      
Officers' compensation   321  
Member of the Board of Directors and Family      
Related Party Transaction [Line Items]      
Payment of employment related commissions and incentives 2,000 2,200  
Member of the Board of Directors      
Related Party Transaction [Line Items]      
Payment of employment related commissions and incentives 200 200  
Son of member of Board of Directors      
Related Party Transaction [Line Items]      
Payment of employment related commissions and incentives 1,800    
Professional fees 100    
Family Members [Member]      
Related Party Transaction [Line Items]      
Payment of employment related commissions and incentives   2,000  
Daughter and Daughter-in-law of Member of Board of Directors      
Related Party Transaction [Line Items]      
Payment of employment related commissions and incentives     $ 100
Immediate Family Member Of Management Or Principal Owner Three      
Related Party Transaction [Line Items]      
Payment of employment related commissions and incentives 100 200  
Commissions and incentives $ 100 $ 100