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GEOGRAPHICAL BREAKDOWN OF DIRECT WRITTEN PREMIUM (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effects of Reinsurance [Line Items]
Direct premiums written	$ 177.1	$ 142.3	$ 379.6	$ 306.5
Texas
Effects of Reinsurance [Line Items]
Direct premiums written	37.4	30.9	80.4	65.2
Georgia
Effects of Reinsurance [Line Items]
Direct premiums written	20.7	19.4	39.7	37.6
Louisiana
Effects of Reinsurance [Line Items]
Direct premiums written	10.3	5.8	20.6	12.6
Pennsylvania
Effects of Reinsurance [Line Items]
Direct premiums written	9.3	6.7	19.7	15.2
Nevada
Effects of Reinsurance [Line Items]
Direct premiums written	8.2	4.1	16.5	7.5
Utah
Effects of Reinsurance [Line Items]
Direct premiums written	7.9	6.2	16.5	12.2
Colorado
Effects of Reinsurance [Line Items]
Direct premiums written	7.5	4.4	16.4	8.4
Missouri
Effects of Reinsurance [Line Items]
Direct premiums written	5.5	6.0	13.4	13.5
Arizona
Effects of Reinsurance [Line Items]
Direct premiums written	5.4	6.5	12.7	15.0
South Carolina
Effects of Reinsurance [Line Items]
Direct premiums written	6.5	1.2	12.6	4.3
All others states
Effects of Reinsurance [Line Items]
Direct premiums written	$ 58.4	$ 51.1	$ 131.1	$ 115.0
Geographic Concentration Risk | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk | Texas | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	21.10%	21.70%	21.20%	21.30%
Geographic Concentration Risk | Georgia | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	11.70%	13.60%	10.50%	12.30%
Geographic Concentration Risk | Louisiana | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	5.80%	4.10%	5.40%	4.10%
Geographic Concentration Risk | Pennsylvania | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	5.30%	4.70%	5.20%	5.00%
Geographic Concentration Risk | Nevada | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	4.60%	2.90%	4.30%	2.40%
Geographic Concentration Risk | Utah | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	4.50%	4.40%	4.30%	4.00%
Geographic Concentration Risk | Colorado | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	4.20%	3.10%	4.30%	2.70%
Geographic Concentration Risk | Missouri | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	3.10%	4.20%	3.50%	4.40%
Geographic Concentration Risk | Arizona | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	3.00%	4.60%	3.30%	4.90%
Geographic Concentration Risk | South Carolina | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	3.70%	0.80%	3.30%	1.40%
Geographic Concentration Risk | All others states | Direct Written Premiums
Effects of Reinsurance [Line Items]
Concentration percentage	33.00%	35.90%	34.70%	37.50%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

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