REINSURANCE - (Narrative) (Details) $ in Thousands	1 Months Ended			12 Months Ended
	Jul. 31, 2017	Sep. 30, 2016 USD ($)	Jul. 31, 2016	Dec. 31, 2017 USD ($) reinsurers	Jul. 01, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jul. 01, 2016
Liability for Catastrophe Claims [Line Items]
Reinsurance recoverable				$ 124,601		$ 47,863
Amount payable under reinsurance program				71,944		79,154
Trust agreement for loss exposure				2,600
FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				179,500
FNIC's 2017-2018 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				173,900
Private Market Excess Of Loss Treaties [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured				18,000
Payments for Reinsurance				7,100
Federated Nationals Insurance Company Non Florida Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				1,700
Federated Nationals Insurance Company Non Florida Reinsurance Program [Member] | Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount				21,000
MNIC's 2017-2018 Reinsurance Programs [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				$ 5,000
Quota Share Treaties [Member] | Private Passenger Automobile Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Period of property quota share reinsurance treaty				1 year
Quota Share Treaties [Member] | Private Passenger Automobile Insurance Product Line [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of quota share reinsurance treaty				75.00%
Federated National's Florida [Member] | FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				$ 125,600
Federated National's Florida [Member] | FNIC's 2017-2018 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				124,000
Federated National's Florida [Member] | Private Market Excess Of Loss Treaties [Member]
Liability for Catastrophe Claims [Line Items]
Amount Of Private Market Excess Of Loss Treaties					$ 25,100
Federated National's Florida [Member] | MNIC's 2017-2018 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount				3,400
Federated National's Florida [Member] | MNIC's 2017-2018 Reinsurance Programs [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				$ 3,200
FHCF [Member] | FNIC's 2015-2016 Catastrophe Reinsurance Program [Member] | Property Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share program				40.00%
FHCF [Member] | FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				$ 53,900
Percentage of quota share reinsurance treaty				75.00%
FHCF [Member] | FNIC's 2017-2018 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				$ 49,900
Percentage of quota share reinsurance treaty				75.00%
FHCF [Member] | MNIC’s 2016-2017 Catastrophe Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Private market term for loss treaties				13 months
FHCF [Member] | MNIC's 2017-2018 Reinsurance Programs [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program				$ 1,800
Percentage of quota share reinsurance treaty				75.00%
Private and FHCF Reinsurance [Member] | FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Liability for Catastrophe Claims, Carrying Amount				$ 2,200,000
Maximum single event coverage				1,600,000
Private and FHCF Reinsurance [Member] | FNIC's 2017-2018 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Liability for Catastrophe Claims, Carrying Amount				2,200,000
Maximum single event coverage				1,500,000
Private and FHCF Reinsurance [Member] | MNIC's 2017-2018 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Maximum single event coverage				64,900
Private and FHCF Reinsurance [Member] | MNIC's 2017-2018 Reinsurance Programs [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Liability for Catastrophe Claims, Carrying Amount				109,000
FNIC [Member]
Liability for Catastrophe Claims [Line Items]
Trust agreement for loss exposure						2,600
FNIC [Member] | Quota Share Treaties [Member] | Property Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share expired on cut off basis					10.00%
Percentage of unearned premiums and losses retained					10.00%
MNIC [Member]
Liability for Catastrophe Claims [Line Items]
Trust agreement for loss exposure				300		$ 300
Florida [Member] | FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured				18,500
Florida [Member] | FNIC's 2016-2017 Reinsurance Programs [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured				8,000
Florida [Member] | FNIC's 2016-2017 Reinsurance Programs [Member] | Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured				$ 18,500
Florida [Member] | Quota Share Treaties [Member] | Property Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Period of property quota share reinsurance treaty				2 years
Percentage of quota share reinsurance treaty	10.00%		30.00%	30.00%
Florida [Member] | Quota Share Treaties [Member] | Property Insurance Product Line [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Covered losses for homeowners' insurance program				$ 100,000
Florida [Member] | Quota Share Treaties [Member] | Property Insurance Product Line [Member] | Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Covered losses for homeowners' insurance program				$ 200,000
Florida [Member] | Quota Share One [Member] | Property Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of quota share reinsurance treaty				30.00%
Percentage of property quota share expired on cut off basis							30.00%
Percentage of unearned premiums and losses retained							30.00%
Florida [Member] | Quota Share Two [Member] | Property Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of quota share reinsurance treaty				10.00%
Florida [Member] | FHCF [Member] | MNIC’s 2016-2017 Catastrophe Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount				$ 3,400
Louisiana, Alabama and South Carolina [Member] | FNIC's 2016-2017 Reinsurance Programs [Member] | Minimum [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured		$ 8,000
Louisiana, Alabama and South Carolina [Member] | FNIC's 2016-2017 Reinsurance Programs [Member] | Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured		$ 18,500
New Multiple Year Protection This Year [Member] | Florida And Non Florida Exposures [Member] | Private Market Excess Of Loss Treaties [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount					$ 89,000
Renewing Multiple Year Protection From Last Year [Member] | Florida And Non Florida Exposures [Member] | Private Market Excess Of Loss Treaties [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount					$ 156,000
First Event Coverage [Member] | Federated Nationals Insurance Company Non Florida Reinsurance Program [Member] | Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount				5,000
Reinsurance Retention Policy, Amount Retained				13,000
Reinsurance Amount Retained On Net Basis With Profit Share Agreement				6,500
Second Event Coverage [Member] | Federated Nationals Insurance Company Non Florida Reinsurance Program [Member] | Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Additional coverage amount				16,000
Reinsurance Retention Policy, Amount Retained				2,000
Reinsurance Amount Retained On Net Basis With Profit Share Agreement				1,000
Hurricane Irma [Member]
Liability for Catastrophe Claims [Line Items]
Reinsurance recoverable				$ 88,000
Number Of Reinsurers | reinsurers				1
Reinsurer Concentration Risk [Member] | Reinsurance Recoverable [Member] | Hurricane Irma [Member]
Liability for Catastrophe Claims [Line Items]
Concentration risk, percentage				15.00%