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ORGANIZATION, CONSOLIDATION AND BASIS OF PRESENTATION (Narrative) (Details) - Premiums Written Net - Homeowners Multiperil Insurance Product Line - Customer Concentration Risk
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Ivantage Select Agency Inc    
Organization, Consolidation, And Basis of Preparation [Line Items]    
Concentration risk, percentage 19.60% 20.50%
SageSure Insurance Managers LLC    
Organization, Consolidation, And Basis of Preparation [Line Items]    
Concentration risk, percentage 24.50% 24.20%
Profit sharing agreement, profit sharing percent 50.00%