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Fair Value of Financial Instruments (Reconciliation Of Fair Valued Assets Measured On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 17,538us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember	$ 11,442us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember
Included in earnings	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember
Included in other comprehensive income	7,801us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember	6,096us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember
Ending Balance	25,339us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember	17,538us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember
The amount of total gains or losses for the period included in earnings attributable to the change in realized/unrealized gains or losses related to assets still held at the reporting date	0func_GainsOrLossesIncludedInEarningsAttributableToChangeInRealizedUnrealizedGainsOrLosses / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember	0func_GainsOrLossesIncludedInEarningsAttributableToChangeInRealizedUnrealizedGainsOrLosses / us-gaap_DebtSecurityAxis = us-gaap_CollateralizedDebtObligationsMember
Interest Rate Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	(457)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember	(849)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember
Included in earnings	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember
Included in other comprehensive income	258us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember	392us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember
Ending Balance	(199)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember	(457)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember
The amount of total gains or losses for the period included in earnings attributable to the change in realized/unrealized gains or losses related to assets still held at the reporting date	$ 0func_GainsOrLossesIncludedInEarningsAttributableToChangeInRealizedUnrealizedGainsOrLosses / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember	$ 0func_GainsOrLossesIncludedInEarningsAttributableToChangeInRealizedUnrealizedGainsOrLosses / us-gaap_DebtSecurityAxis = us-gaap_InterestRateSwapMember

X

- Definition

Information on the investment portfolio for gains or losses and the unrealized portion of gains or losses in the portfolio.

+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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- Definition

Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1a)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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