LOSS AND LOSS ADJUSTMENT RESERVES - (Schedule of Reconciliation of Net Incurred and Paid Development) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Liability for Claims and Claims Adjustment Expense [Abstract]
Total liabilities for unpaid losses and LAE, net of reinsurance	$ 181,148	$ 179,030
Reinsurance Recoverables on Unpaid Losses, Gross to Net [Abstract]
Total reinsurance recoverables	554,107	358,128
Unallocated loss adjustment expenses	3,539	3,209
Unfavorable loss and LAE reserve	738,794	540,367	$ 324,362	$ 296,230
Homeowners
Liability for Claims and Claims Adjustment Expense [Abstract]
Total liabilities for unpaid losses and LAE, net of reinsurance	157,143	149,314
Reinsurance Recoverables on Unpaid Losses, Gross to Net [Abstract]
Total reinsurance recoverables	553,689	353,741
Unfavorable loss and LAE reserve	157,143
Commercial general liability
Liability for Claims and Claims Adjustment Expense [Abstract]
Total liabilities for unpaid losses and LAE, net of reinsurance	23,637	28,328
Reinsurance Recoverables on Unpaid Losses, Gross to Net [Abstract]
Total reinsurance recoverables	0	0
Unfavorable loss and LAE reserve	23,637
Automobile
Liability for Claims and Claims Adjustment Expense [Abstract]
Total liabilities for unpaid losses and LAE, net of reinsurance	368	1,388
Reinsurance Recoverables on Unpaid Losses, Gross to Net [Abstract]
Total reinsurance recoverables	352	1,424
Unfavorable loss and LAE reserve	368
Flood
Liability for Claims and Claims Adjustment Expense [Abstract]
Total liabilities for unpaid losses and LAE, net of reinsurance	0	0
Reinsurance Recoverables on Unpaid Losses, Gross to Net [Abstract]
Total reinsurance recoverables	$ 66	$ 2,963