GEOGRAPHICAL BREAKDOWN OF GROSS PREMIUMS WRITTEN (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effects of Reinsurance [Line Items]
Gross premiums written	$ 600.0	$ 742.6	$ 616.8
Texas
Effects of Reinsurance [Line Items]
Gross premiums written	109.3	152.3	132.5
Georgia
Effects of Reinsurance [Line Items]
Gross premiums written	62.3	79.2	72.4
Colorado
Effects of Reinsurance [Line Items]
Gross premiums written	40.6	33.5	20.2
Pennsylvania
Effects of Reinsurance [Line Items]
Gross premiums written	34.9	39.8	30.2
Louisiana
Effects of Reinsurance [Line Items]
Gross premiums written	33.1	42.2	28.0
Utah
Effects of Reinsurance [Line Items]
Gross premiums written	30.9	33.8	26.0
Nevada
Effects of Reinsurance [Line Items]
Gross premiums written	28.4	33.6	19.1
South Carolina
Effects of Reinsurance [Line Items]
Gross premiums written	20.1	26.3	9.6
Oklahoma
Effects of Reinsurance [Line Items]
Gross premiums written	19.8	22.5	18.6
Indiana
Effects of Reinsurance [Line Items]
Gross premiums written	17.8	21.7	18.1
All others states
Effects of Reinsurance [Line Items]
Gross premiums written	$ 202.8	$ 257.7	$ 242.1
Geographic Concentration Risk | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	100.00%	100.00%	100.00%
Geographic Concentration Risk | Texas | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	18.20%	20.50%	21.50%
Geographic Concentration Risk | Georgia | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	10.40%	10.70%	11.70%
Geographic Concentration Risk | Colorado | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	6.80%	4.50%	3.30%
Geographic Concentration Risk | Pennsylvania | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	5.80%	5.40%	4.90%
Geographic Concentration Risk | Louisiana | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	5.50%	5.70%	4.50%
Geographic Concentration Risk | Utah | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	5.20%	4.60%	4.20%
Geographic Concentration Risk | Nevada | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	4.70%	4.50%	3.10%
Geographic Concentration Risk | South Carolina | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	3.40%	3.50%	1.60%
Geographic Concentration Risk | Oklahoma | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	3.30%	3.00%	3.00%
Geographic Concentration Risk | Indiana | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	3.00%	2.90%	2.90%
Geographic Concentration Risk | All others states | Gross Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage (in percent)	33.70%	34.70%	39.30%