SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Material Distribution Relationships	Material Distribution Relationships Ivantage Select Agency, Inc. The Company is a party to an insurance agency master agreement with Ivantage Select Agency, Inc. (“ISA”), an affiliate of Allstate Insurance Company (“Allstate”), pursuant to which the Company has been authorized by ISA to appoint Allstate agents to offer the Company’s homeowners insurance products to consumers in Florida. As a percentage of the total homeowners premiums we underwrote, 23.9% and 24.4% were from Allstate’s network of Florida agents, for the three months ended June 30, 2019 and 2018, respectively. For the six months ended June 30, 2019 and 2018, 23.4% and 23.7%, respectively, of the homeowners premiums we underwrote were from Allstate's network of Florida agents. SageSure Insurance Managers, LLC The Company is a party to a managing general underwriting agreement with SageSure Insurance Managers, LLC (“SageSure”) to facilitate growth in our FNIC homeowners business outside of Florida. As a percentage of the total homeowners premiums, 22.0% and 14.5%, respectively, of the Company’s premiums were underwritten by SageSure, for the three months ended June 30, 2019 and 2018, respectively. For the six months ended June 30, 2019 and 2018, 21.0% and 13.3%, respectively, of the Company's homeowners premiums were underwritten by Sagesure.
Basis of Presentation	Basis of Presentation and Principles of Consolidation The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“GAAP”). The consolidated financial statements include the accounts of FNHC and its wholly-owned subsidiaries and all entities in which the Company has a controlling financial interest and any variable interest entity (“VIE”) of which the Company is the primary beneficiary. The Company’s management believes the consolidated financial statements reflect all material adjustments, including normal recurring adjustments, necessary to fairly state the financial position, results of operations and cash flows of the Company for the periods presented. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company identifies a VIE as an entity that does not have sufficient equity to finance its own activities without additional financial support or where the equity investors lack certain characteristics of a controlling financial interest. The Company assesses its contractual, ownership or other interests in a VIE to determine if the Company’s interest participates in the variability the VIE was designed to absorb and pass onto variable interest holders. The Company performs an ongoing qualitative assessment of its variable interests in a VIE to determine whether the Company has a controlling financial interest and would therefore be considered the primary beneficiary of the VIE. If the Company determines it is the primary beneficiary of a VIE, the Company consolidates the assets and liabilities of the VIE in its consolidated financial statements.
Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“GAAP”). The consolidated financial statements include the accounts of FNHC and its wholly-owned subsidiaries and all entities in which the Company has a controlling financial interest and any variable interest entity (“VIE”) of which the Company is the primary beneficiary. The Company’s management believes the consolidated financial statements reflect all material adjustments, including normal recurring adjustments, necessary to fairly state the financial position, results of operations and cash flows of the Company for the periods presented. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company identifies a VIE as an entity that does not have sufficient equity to finance its own activities without additional financial support or where the equity investors lack certain characteristics of a controlling financial interest. The Company assesses its contractual, ownership or other interests in a VIE to determine if the Company’s interest participates in the variability the VIE was designed to absorb and pass onto variable interest holders. The Company performs an ongoing qualitative assessment of its variable interests in a VIE to determine whether the Company has a controlling financial interest and would therefore be considered the primary beneficiary of the VIE. If the Company determines it is the primary beneficiary of a VIE, the Company consolidates the assets and liabilities of the VIE in its consolidated financial statements.
Accounting Estimates and Assumptions	Accounting Estimates and Assumptions The Company prepares the accompanying consolidated financial statements in accordance with GAAP, which requires management to make estimates and assumptions about future events that affect the amounts reported in the financial statements and accompanying notes. Future events and their effects cannot be determined with absolute certainty. Therefore, the determination of estimates requires the exercise of judgment. Actual results may materially differ from those estimates. Similar to other property and casualty insurers, the Company’s liability for loss and loss adjustment expenses ("LAE") reserves, although supported by actuarial projections and other data, is ultimately based on management’s reasoned expectations of future events. Although considerable variability is inherent in these estimates, the Company believes that the liability and LAE reserve is adequate. The Company reviews and evaluates its estimates and assumptions regularly and makes adjustments, reflected in current operations, as necessary, on an ongoing basis.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements, Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842). The update superseded the prior lease guidance in Topic 840, Leases and lessees are required to recognize for all leases, with the exception of short-term leases, a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis. Additionally, lessees are required to recognize a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The Company adopted the guidance effective January 1, 2019, by reflecting a $6.1 million right-of-use asset, after-tax, and $6.1 million lease liability, after-tax, on our consolidated balance sheets for our leases in existence as of that date. All of the Company's leases were classified as operating leases and we elected the practical expedient, therefore no adjustment to comparative prior periods presented have been made. The provisions of this ASU did not have an impact on our pattern of lease expense recognition on our consolidated statements of operations. Refer to Note 10 below for additional information regarding leases. Recently Issued Accounting Pronouncements, Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which significantly changes the measurement of credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The update requires entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as currently performed under the other-than-temporary impairment ("OTTI") model. The update also requires enhanced disclosures for financial assets measured at amortized cost and available-for-sale debt securities to help the financial statement users better understand significant judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an entity’s portfolio. The update is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The Company is in the early stage of evaluating the impact that the update will have on the Company’s consolidated financial position or results of operations. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. ASU 2018-15 requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. The update is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The Company is in the early stage of evaluating the impact that the update will have on the Company’s consolidated financial position or results of operations.