REINSURANCE (Narrative) (Details) - USD ($)																	1 Months Ended	3 Months Ended
	Dec. 31, 2021	Nov. 15, 2021	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. 30, 2020	Sep. 03, 2020	Jul. 01, 2020	Jun. 30, 2020	Mar. 31, 2022	Dec. 31, 2021
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities	$ 102,748,000																	$ 46,535,000	$ 102,748,000
Reinsurance recoverable	613,203,000																	581,921,000	613,203,000
Maximum | Hurricane
Liability for Catastrophe Claims [Line Items]
Reinsurance recoverable	504,800,000																	480,000,000	504,800,000
FNIC
Liability for Catastrophe Claims [Line Items]
Trust agreement for loss exposure (Less than)	$ 100,000																	100,000	$ 100,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																		305,900,000
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																		258,300,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | FHCF
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities																		47,600,000
Maximum single event coverage																		$ 650,000,000
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			$ 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]
Aggregate maximum single event coverage																		1,300,000,000
Excess retention, amount reinsured																		25,000,000
Liability for catastrophe claims																		1,900,000,000
Maximum single event coverage																		650,000,000
Increase in carrying amount																		345,000,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Private and FHCF Reinsurance | Florida
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																		1,300,000,000
Liability for catastrophe claims																		1,900,000,000
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																		$ 237,900,000
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]
Aggregate maximum single event coverage																		1,400,000,000
Liability for catastrophe claims																		2,250,000,000
Reinsurance payable and funds withheld liabilities																		274,100,000
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																		36,200,000
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																		204,800,000
Primary Tower | Private and FHCF Reinsurance | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																		982,000,000
Excess retention, amount reinsured																		10,000,000
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																		$ 69,400,000
Downward premium exposure adjustment from exposure management initiatives, percent																		19.00%
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																		$ 6,000,000
Retention percentage																		34.00%
FNIC SageSure Tower | Private and FHCF Reinsurance | First Event Coverage | All Perils
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured																		$ 12,000,000
Retention percentage																		66.00%
FNIC SageSure Tower | Private and FHCF Reinsurance | Non-Florida Homeowners Book Of Business
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage																		$ 450,000,000
Excess retention, amount reinsured																		$ 8,250,000
Quota Share One | FNIC | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty	7.50%	10.00%	20.00%				10.00%	10.00%
Percentage of quota share reinsurance treaty terminated	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%
Proceeds from initial commutation agreement					$ 7,200,000
New percentage quota share reinsurance treaty					80.00%
Pre-tax loss from settlement of managerial general underwriting and profit sharing agreements																			$ 2,500,000
Quota Share One | FNIC | Non-Florida Homeowners Book Of Business | SageSure LLP
Liability for Catastrophe Claims [Line Items]
Percentage of quota share reinsurance treaty terminated	80.00%																		80.00%
New percentage quota share reinsurance treaty	100.00%
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%