Bond portfolio reclassified between available-for-sale and held-to-maturity during the period.

No definition available.

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

- Definition

Represents the percentage increase in investments during the period over the prior period end.

+ References

No definition available.

+ Details

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

- Definition

Percentage of debt securities to total debt portfolio.

+ References

No definition available.

+ Details

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

- Definition

Percentage of equity holdings to total equity portfolio.

+ References

No definition available.

+ Details

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

- Definition

Ratio of available-for-sale securities to total investments.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

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

- Definition

The increase (decrease), resulting in a gain, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period.

+ References

No definition available.

+ Details

Name:	us-gaap_UnrealizedGainOnSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=fnhc_DiverseIndustriesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=fnhc_DiverseIndustriesEquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=fnhc_MutualFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Investments (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
Investments (Details) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Investments [Abstract]
Increase in total investments	$ 35.2
Percentage increase in investments (in hundredths)	10.70%
Ratio of available-for-sale securities to total investments (in hundredths)	98.00%		98.00%
Schedule of Available-for-sale Securities [Line Items]
Bond portfolio reclassified between available-for-sale and held-to-maturity	$ 1.0	$ 0.0
Diverse Industries Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage of debt securities to total debt portfolio (in hundredths)	78.00%		77.00%
United States Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage of debt securities to total debt portfolio (in hundredths)	22.00%		23.00%
Diverse Industries Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage of equity holdings to total equity portfolio (in hundredths)	86.00%		88.00%
Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage of equity holdings to total equity portfolio (in hundredths)	14.00%		12.00%