Represents the amount retained by the Company for each loss.

No definition available.

Name:	fnhc_AmountRetainedPerLoss
Namespace Prefix:	fnhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of ceded premium written in connection with catastrophe reinsurance program.

+ References

No definition available.

+ Details

Name:	fnhc_CededPremiumsInConnectionWithReinsuranceProgram
Namespace Prefix:	fnhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of estimated liability as of the balance sheet date for the specific conflagration, earthquake, windstorm, explosion, or similar event per year with maximum single event coverage.

+ References

No definition available.

+ Details

Name:	fnhc_CoveredLossesForTheCompanySInForceNewAndRenewalHomeownersInsuranceProgram
Namespace Prefix:	fnhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum Pre-Tax Retention Amount Representing Percentage Of Shareholders Equity

+ References

No definition available.

+ Details

Name:	fnhc_MaximumPreTaxRetentionAmountRepresentingPercentageOfShareholdersEquity
Namespace Prefix:	fnhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum coverage per incident provided by the insurance arrangement.

+ References

No definition available.

+ Details

Name:	fnhc_MaximumSingleEventCoverage
Namespace Prefix:	fnhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Refers to the number of quota share treaties.

+ References

No definition available.

+ Details

Name:	fnhc_NumberOfQuotaShareTreaties
Namespace Prefix:	fnhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of quota share expired on cut off basis of insurance programs.

+ References

No definition available.

+ Details

Name:	fnhc_PercentageOfQuotaShareExpiredOnCutOffBasis
Namespace Prefix:	fnhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Element represents percentage in quota share insurance programs.

+ References

No definition available.

+ Details

Name:	fnhc_PercentageOfQuotaShareProgram
Namespace Prefix:	fnhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to percentage of quota share reinsurance treaty.

+ References

No definition available.

+ Details

Name:	fnhc_PercentageOfQuotaShareReinsuranceTreaty
Namespace Prefix:	fnhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Element represents percentage of unearned premiums and losses.

+ References

No definition available.

+ Details

Name:	fnhc_PercentageOfUnearnedPremiumsAndLosses
Namespace Prefix:	fnhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Refers to the period of quota share reinsurance treaty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	fnhc_PeriodOfQuotaShareReinsuranceTreaty
Namespace Prefix:	fnhc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The additional coverage per incident provided by the insurance arrangement.

+ References

No definition available.

+ Details

Name:	fnhc_ReinsurancePolicyAdditionalCoverageAmount
Namespace Prefix:	fnhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Element represents the time period for loss treaties, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	fnhc_TermForLossTreaties
Namespace Prefix:	fnhc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of a trust agreement funded for potential loss exposure.

+ References

No definition available.

+ Details

Name:	fnhc_TrustAgreementForLossExposure
Namespace Prefix:	fnhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of estimated liability as of the balance sheet date for the specific conflagration, earthquake, windstorm, explosion, or similar event.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437

+ Details

Name:	us-gaap_LiabilityForCatastropheClaimsCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LiabilityForCatastropheClaimsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount as of the balance sheet date of the known and estimated amounts owed to insurers under reinsurance treaties or other arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.13(a)(3),(c))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_ReinsurancePayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of risk reinsured in excess of stated retention per company policy.

+ References

No definition available.

+ Details

Name:	us-gaap_ReinsuranceRetentionPolicyExcessRetentionAmountReinsured
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=fnhc_FederatedNationalS20162017ReinsuranceProgramsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=fnhc_QuotaShareTreatiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=fnhc_PrivatePassengerAutomobileInsuranceProductLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CededCreditRiskAxis=fnhc_FederatedNationalSFloridaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CededCreditRiskAxis=fnhc_FloridaHurricaneCatastropheFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=fnhc_FederatedNationalS20152016CatastropheReinsuranceProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=us-gaap_PropertyInsuranceProductLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CededCreditRiskAxis=fnhc_PrivateAndFhcfReinsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_FL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=fnhc_QuotaShareOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=fnhc_QuotaShareTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReinsurancePolicyTypeAxis=fnhc_MonarchNationalTwentySixteenToTwentySeventeenCatastropheReinsuranceProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fnhc_LouisianaAlabamaAndSouthCarolinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

REINSURANCE (Narrative) (Details) $ in Thousands	1 Months Ended	12 Months Ended
REINSURANCE (Narrative) (Details) $ in Thousands	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) agreement	Jul. 01, 2016	Dec. 31, 2015 USD ($)
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program		$ 79,154		$ 61,069
Trust agreement for loss exposure		2,600		$ 3,500
FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program		$ 179,500
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 property quota share reinsurance treaty		75.00%
Quota Share Treaties [Member] \| Private Passenger Automobile Insurance Product Line [Member] \| Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of property quota share reinsurance treaty		90.00%
Federated National's Florida [Member] \| FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Amount payable under reinsurance program		$ 125,700
FHCF [Member] \| FNIC's 2015-2016 Catastrophe Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Aggregate catastrophic losses coverage amount		1,820,000
Maximum single event coverage		1,260,000
Ceded premiums in connection with catastrophe reinsurance program		$ 149,700
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		$ 53,800
Percentage of property quota share reinsurance treaty		75.00%
Private and FHCF Reinsurance [Member] \| FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Aggregate catastrophic losses coverage amount		$ 2,220,000
Maximum single event coverage		1,580,000
Florida [Member] \| FNIC's 2016-2017 Reinsurance Programs [Member]
Liability for Catastrophe Claims [Line Items]
Pre-tax retention amount for catastrophic event		$ 18,450
Maximum pre-tax retention amount representing percentage of shareholder’s equity		7.76%
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
Number of property quota share treaties \| agreement		2
Percentage of property quota share reinsurance treaty		40.00%
Covered losses for homeowners' insurance program		$ 100,000
Florida [Member] \| Quota Share One [Member] \| Property Insurance Product Line [Member]
Liability for Catastrophe Claims [Line Items]
Percentage of property 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 property quota share reinsurance treaty		10.00%
Florida [Member] \| FHCF [Member] \| FNIC's 2015-2016 Catastrophe Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Amount retained per loss		$ 12,900
Florida [Member] \| FHCF [Member] \| MNIC’s 2016-2017 Catastrophe Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Private market term for loss treaties		13 months
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]
Pre-tax retention amount for catastrophic event	$ 8,000
Louisiana, Alabama and South Carolina [Member] \| FNIC's 2016-2017 Reinsurance Programs [Member] \| Maximum [Member]
Liability for Catastrophe Claims [Line Items]
Pre-tax retention amount for catastrophic event	$ 18,450
Louisiana, Alabama and South Carolina [Member] \| FHCF [Member] \| FNIC's 2015-2016 Catastrophe Reinsurance Program [Member]
Liability for Catastrophe Claims [Line Items]
Amount retained per loss		$ 5,000