Refers to percentage of quota share reinsurance treaty.

No definition available.

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

- Definition

Reinsurance Retention Policy, Excess Retention, Retention Percentage, Co-Participation

+ References

No definition available.

+ Details

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

- Definition

Reinsurance Retention Policy, Excess Retention, Threshold Limit Above Initial Insured Amount

+ References

No definition available.

+ Details

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

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12021-110248

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.9)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=us-gaap_HurricaneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	fnhc_ReinsurancePolicyCoverageAxis=fnhc_SecondAndThirdEventCoverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=fnhc_HurricaneDeltaAndSubsequentEventsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=fnhc_FloridaHomeownersBookOfBusinessMember
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_QuotaShareOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=fnhc_NonFloridaHomeownersBookOfBusinessMember
Namespace Prefix:
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SUBSEQUENT EVENTS (Details) $ in Millions										9 Months Ended
SUBSEQUENT EVENTS (Details) $ in Millions	Nov. 05, 2020 USD ($) numberOfReportedClaims	Nov. 03, 2020	Nov. 02, 2020	Oct. 12, 2020 USD ($)	Oct. 01, 2020	Jul. 01, 2020	Jul. 01, 2019	Jul. 01, 2018	Jul. 01, 2017	Sep. 30, 2020 USD ($)
Subsequent Event \| Hurricane
Subsequent Event [Line Items]
Number of reported claims \| numberOfReportedClaims	5,042
Loss from catastrophes	$ 41.4
Estimate of possible losses	$ 27.0
FNIC \| 2020-2021 Catastrophe Excess of Loss Reinsurance Program
Subsequent Event [Line Items]
Retention percentage, co-participation										8.60%
Threshold limit above initial insured amount										$ 70.0
FNIC \| 2020-2021 Catastrophe Excess of Loss Reinsurance Program \| Second and Third Event Coverage
Subsequent Event [Line Items]
Retention percentage, co-participation										71.50%
Threshold limit above initial insured amount										$ 15.0
FNIC \| 2020-2021 Catastrophe Excess of Loss Reinsurance Program \| Subsequent Event \| Second and Third Event Coverage \| Hurricane Delta and Subsequent Events
Subsequent Event [Line Items]
Retention percentage, co-participation				50.00%
Threshold limit above initial insured amount				$ 10.0
Florida Homeowners Book of Business \| FNIC \| Quota Share Two
Subsequent Event [Line Items]
Percentage of property quota share reinsurance treaty						10.00%			10.00%	10.00%
Florida Homeowners Book of Business \| FNIC \| Quota Share Two \| Subsequent Event
Subsequent Event [Line Items]
Percentage of property quota share reinsurance treaty					20.00%
Florida Homeowners Book of Business \| FNIC \| Quota Share One
Subsequent Event [Line Items]
Percentage of property quota share reinsurance treaty							10.00%	2.00%		30.00%
Non-Florida Homeowners Book Of Business \| FNIC \| Quota Share One \| Subsequent Event
Subsequent Event [Line Items]
Percentage of property quota share reinsurance treaty		80.00%	50.00%