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VARIABLE INTEREST ENTITY (Narrative) (Details) - Monarch Delaware Holdings LLC [Member] - USD ($)
$ in Millions
2 Months Ended 3 Months Ended
Feb. 21, 2018
Mar. 31, 2017
Mar. 31, 2018
Dec. 31, 2017
Variable Interest Entity [Line Items]        
Ownership percentage 42.40%   42.40% 100.00%
Premiums earned, net $ 2.3 $ 2.7    
Loss and LAE $ 2.3 $ 1.8    
FNHC [Member]        
Variable Interest Entity [Line Items]        
Ownership percentage 42.40%      
Crosswinds Holdings [Member]        
Variable Interest Entity [Line Items]        
Ownership percentage 42.40%      
TransRe [Member]        
Variable Interest Entity [Line Items]        
Ownership percentage 15.20%