REINSURANCE (Narrative) (Details) - USD ($) $ in Thousands									1 Months Ended	9 Months Ended
	Nov. 05, 2020	Oct. 12, 2020	Oct. 01, 2020	Sep. 03, 2020	Jul. 01, 2020	Jul. 01, 2019	Jul. 01, 2018	Jul. 01, 2017	Jul. 31, 2016	Sep. 30, 2020	Dec. 31, 2019	Jul. 01, 2016
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										$ 230,987	$ 102,467
Reinsurance recoverable, net of allowance of $52 and $0, respectively										452,194	209,615
Maximum | Hurricane
Liability for Catastrophe Claims [Line Items]
Reinsurance recoverable, net of allowance of $52 and $0, respectively										304,700	163,700
Federated Nationals Insurance Company Non Florida Reinsurance Program 2018-2019 | Maximum
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										1,800
2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										224,300
2019-2020 Catastrophe Excess Loss Reinsurance Programs | Maximum | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Reinsurance retention amount										20,000
Reinsurance amount retained on net basis with profit share agreement										10,000
2019-2020 Catastrophe Excess Loss Reinsurance Programs | Maximum | Second Event Coverage
Liability for Catastrophe Claims [Line Items]
Additional coverage amount										18,000
Reinsurance retention amount										2,000
Reinsurance amount retained on net basis with profit share agreement										1,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										283,300
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Maximum | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Reinsurance retention amount										18,000
Reinsurance amount retained on net basis with profit share agreement										9,000
2020-2021 Catastrophe Excess of Loss Reinsurance Program | Maximum | Second Event Coverage
Liability for Catastrophe Claims [Line Items]
Additional coverage amount										16,000
Reinsurance retention amount										2,000
Reinsurance amount retained on net basis with profit share agreement										1,000
Quota Share Treaties | Property Insurance Product Line | Florida
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty								10.00%	30.00%
Quota Share One | Property Insurance Product Line | Florida
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share expired on cut off basis												30.00%
Percentage of unearned premiums and losses retained												30.00%
Federated National's Florida Exposure | 2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										178,500
Federated National's Florida Exposure | 2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										235,900
FHCF | 2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Reinsurance payable and funds withheld liabilities										$ 45,800
FHCF | 2019-2020 Catastrophe Excess Loss Reinsurance Programs | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty										90.00%
FHCF | 2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Maximum single event coverage										$ 650,000
Reinsurance payable and funds withheld liabilities										$ 47,400
FHCF | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty										90.00%
FNIC
Liability for Catastrophe Claims [Line Items]
Trust agreement for loss exposure (Less than)										$ 100	$ 100
FNIC | 2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured										27,000
Additional coverage amount										20,000
FNIC | 2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured										$ 25,000
Potential decrease in retention if placed on parametric basis with an Excess and Surplus lines carrier										28.50%
Retention percentage										100.00%
Amount reinsured, co-participation										$ 6,000
Retention percentage, co-participation										8.60%
Threshold limit above initial insured amount										$ 70,000
FNIC | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | Second and Third Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured										$ 10,000
Retention percentage, co-participation										71.50%
Threshold limit above initial insured amount										$ 15,000
Second and third event retention, combined basis										$ 14,300
FNIC | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | Second and Third Event Coverage | Hurricane Delta and Subsequent Events
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured				$ 39,200
Reinsurance payable and funds withheld liabilities				$ 11,200
FNIC | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | Second and Third Event Coverage | Hurricane Delta and Subsequent Events | Subsequent Event
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured	$ 13,500	$ 8,000
Reinsurance payable and funds withheld liabilities	$ 2,000	$ 875
Retention percentage, co-participation		50.00%
Threshold limit above initial insured amount		$ 10,000
FNIC | Quota Share Treaties | Property Insurance Product Line | Florida
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty										40.00%
FNIC | Quota Share One | Property Insurance Product Line
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share expired on cut off basis								10.00%
FNIC | Quota Share One | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty						10.00%	2.00%			30.00%
Reinsurance policy term										2 years
FNIC | Quota Share One | 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%
FNIC | Quota Share Two | Florida Homeowners Book of Business
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty					10.00%			10.00%		10.00%
FNIC | Quota Share Two | Florida Homeowners Book of Business | Subsequent Event
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty			20.00%
Private and FHCF Reinsurance | 2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Maximum single event coverage										$ 1,300,000
Maximum second and third event coverage										15,000
Liability for catastrophe claims										1,900,000
Private and FHCF Reinsurance | 2019-2020 Catastrophe Excess Loss Reinsurance Programs | Florida
Liability for Catastrophe Claims [Line Items]
Aggregate maximum single event coverage										$ 1,300,000
Private and FHCF Reinsurance | 2019-2020 Catastrophe Excess Loss Reinsurance Programs | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty										75.00%
Private and FHCF Reinsurance | 2020-2021 Catastrophe Excess of Loss Reinsurance Program
Liability for Catastrophe Claims [Line Items]
Maximum single event coverage										$ 650,000
Excess retention, amount reinsured										25,000
Liability for catastrophe claims										1,900,000
Aggregate maximum single event coverage										1,300,000
Private and FHCF Reinsurance | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | Florida
Liability for Catastrophe Claims [Line Items]
Liability for catastrophe claims										1,900,000
Private and FHCF Reinsurance | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | First Event Coverage
Liability for Catastrophe Claims [Line Items]
Excess retention, amount reinsured										$ 31,000
Private and FHCF Reinsurance | 2020-2021 Catastrophe Excess of Loss Reinsurance Program | Maximum
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty										90.00%
Monarch National S Florida | 2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Maximum second and third event coverage										$ 10,000
Additional coverage amount										2,000
Maison | 2019-2020 Catastrophe Excess Loss Reinsurance Programs
Liability for Catastrophe Claims [Line Items]
Additional coverage amount										$ 5,000