REINSURANCE (Narrative) (Details) - USD ($)														1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 01, 2021	Mar. 01, 2021	Feb. 01, 2021	Jan. 01, 2021	Dec. 31, 2020	Nov. 15, 2020	Nov. 04, 2020	Nov. 03, 2020	Nov. 02, 2020	Oct. 13, 2020	Oct. 01, 2020	Sep. 03, 2020	Jul. 01, 2020	Jun. 30, 2020	Sep. 30, 2020	Jun. 30, 2021
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities					$ 202,827,000											$ 118,713,000
Reinsurance recoverable					413,026,000											489,539,000
Maximum | Hurricane
Liability for Catastrophe Claims [Line Items]
Reinsurance recoverable					304,300,000											344,800,000
FNIC
Liability for Catastrophe Claims [Line Items]
Trust agreement for loss exposure (Less than)					$ 100,000											100,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																311,600,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Maximum | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Reinsurance retention amount																18,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Maximum | Second Event Coverage
Liability for Catastrophe Claims [Line Items]
Additional coverage amount																16,000,000
Reinsurance retention amount																2,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Federated National's Florida Exposure
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																265,000,000.0
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FHCF
Liability for Catastrophe Claims [Line Items]
Maximum single event coverage																650,000,000
Reinsurance payable and funds withheld liabilities																$ 47,800,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FHCF | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty																90.00%
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FNIC
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 25,000,000
Retention percentage																100.00%
Amount reinsured, co-participation																$ 6,000,000
Retention percentage, co-participation																9.10%
Threshold limit above initial insured amount																$ 70,000,000
Potential decrease in retention if placed on parametric basis with an excess and surplus lines carrier																28.50%
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FNIC | Second and Third Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 10,000,000
Retention percentage, co-participation																71.50%
Threshold limit above initial insured amount																$ 15,000,000
Second and third event retention, combined basis																14,300,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FNIC | Second and Third Event Coverage | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured							$ 13,500,000			$ 8,000,000		$ 39,200,000
Reinsurance payable and funds withheld liabilities							$ 2,000,000.0			$ 875,000		$ 11,200,000
Retention percentage, co-participation										50.00%
Threshold limit above initial insured amount										$ 10,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FNIC | Second and Third Event Coverage | Storm Events in 2020
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured														$ 25,000,000
Reinsurance payable and funds withheld liabilities																2,800,000
Retention percentage, co-participation														5000.00%
Threshold limit above initial insured amount														$ 70,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance
Liability for Catastrophe Claims [Line Items]
Maximum single event coverage																650,000,000
Excess retention, amount reinsured																25,000,000
Liability for catastrophe claims																1,900,000,000
Aggregate maximum single event coverage																1,300,000,000
Increase in carrying amount																333,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | Florida
Liability for Catastrophe Claims [Line Items]
Liability for catastrophe claims																1,900,000,000
Aggregate maximum single event coverage																1,300,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 31,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty																90.00%
2021-2022 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Prepaid automatic reinstatement protection																$ 30,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Florida Homeowners Book of Business | First Event Coverage | Florida
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																972,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Non-Florida Homeowners Book Of Business | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																910,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Non-Florida Homeowners Book Of Business | Second and Third Event Coverage
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																831,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Federated National's Florida Exposure
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																$ 251,900,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | FHCF | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty																90.00%
2021-2022 Catastrophe Excess of Loss Reinsurance Program | FHCF | Non-Florida Homeowners Book Of Business
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																$ 504,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance
Liability for Catastrophe Claims [Line Items]
Liability for catastrophe claims																2,250,000,000
Reinsurance payable and funds withheld liabilities																287,700,000
Aggregate maximum single event coverage																1,400,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 18,250,000
First event retention reduction, percent																41.00%
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | Florida Homeowners Book of Business | First Event Coverage | Florida
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																$ 468,000,000
2021-2022 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | Non-Florida Homeowners Book Of Business
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																2,250,000,000
Primary Tower | Non-Florida Homeowners Book Of Business | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																468,000,000
Primary Tower | FHCF
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																35,800,000
Primary Tower | FNIC | First Event Coverage | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																10,000,000
Threshold limit above initial insured amount																20,000,000
Primary Tower | Private and FHCF Reinsurance
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																204,300,000
Primary Tower | Private and FHCF Reinsurance | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																10,000,000
Aggregate maximum single event coverage																982,000,000
FNIC SageSure Tower | FNIC | First Event Coverage | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																8,000,000
Threshold limit above initial insured amount																22,000,000
FNIC SageSure Tower | FNIC | Non-Florida Homeowners Book Of Business | Second Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 9,750,000
Retention percentage, co-participation																75.00%
Threshold limit above initial insured amount																$ 27,000,000
FNIC SageSure Tower | FNIC | Non-Florida Homeowners Book Of Business | Third Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 17,300,000
Retention percentage, co-participation																47.00%
Threshold limit above initial insured amount																$ 27,000,000
FNIC SageSure Tower | Private and FHCF Reinsurance
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																83,400,000
FNIC SageSure Tower | Private and FHCF Reinsurance | All Perils
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																30,000,000
FNIC SageSure Tower | Private and FHCF Reinsurance | First Event Coverage | Hurricane
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 11,000,000
Retention percentage																60.00%
FNIC SageSure Tower | Private and FHCF Reinsurance | First Event Coverage | All Perils
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 7,000,000
Retention percentage																40.00%
FNIC SageSure Tower | Private and FHCF Reinsurance | Non-Florida Homeowners Book Of Business
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																$ 8,250,000
Aggregate maximum single event coverage																$ 450,000,000
Quota Share One | FNIC | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty	20.00%				10.00%	10.00%
Quota Share One | FNIC | Non-Florida Homeowners Book Of Business
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty								80.00%	50.00%
Percentage of quota share reinsurance treaty terminated				80.00%
New percentage quota share reinsurance treaty			80.00%
Proceeds from initial commutation agreement			$ 7,200,000
Quota Share One | FNIC | Federated Nationals Insurance Company Non Florida Reinsurance Program 2018-2019 | SageSure LLP
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty													50.00%
Profit sharing agreement, profit sharing percent													50.00%
Maison Insurance Company (MIC) | FNIC | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities		$ 13,000,000		$ 2,300,000
Maison Insurance Company (MIC) | FNIC | First Event Coverage | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured				$ 10,000,000
Retention percentage, co-participation				65.00%
Threshold limit above initial insured amount		50,000,000		$ 15,000,000
Excess retention, occurrence deductible				850,000
Maison Insurance Company (MIC) | FNIC | Second Event Coverage | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured		$ 10,000,000		$ 4,150,000
Number of layers protection was secured		2
Quota Share Two | FNIC | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty											20.00%		10.00%		10.00%