XML 73 R96.htm IDEA: XBRL DOCUMENT v2.4.1.9
Accumulated Other Comprehensive Loss (AOCL) (Components of Comprehensive Income) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax $ 8,737us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax $ (8,326)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Cash flow hedges: Unrealized holding gains, Before Tax 258us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax 392us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
Cash flow hedges: Unrealized holding gains, Tax Effect (103)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax (159)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
Cash flow hedges: Unrealized holding gains, Net of Tax 155us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax 233us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Unrealized net actuarial gain (loss), Net of Tax (6,304)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax 3,174us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
Other Comprehensive Income, Before Tax Amount 6,629us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent (3,988)us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
Other Comprehensive Income, Tax (Expense) Benefit (2,649)us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1 1,598us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
Other Comprehensive Income, Net 3,980us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (2,390)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Investment securities- with OTTI AFS [Member]    
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Before Tax Amount 7,234us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 4,626us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Unrealized holding gains, tax effect (2,885)func_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesTaxEffect
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 (1,891)func_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesTaxEffect
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Net of Tax 4,349func_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 2,735func_OtherThanTemporaryImpairmentLossesInvestmentsAvailableForSaleSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income 674us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeAvailabeforsaleSecuritiesBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 537us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeAvailabeforsaleSecuritiesBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Tax Effect (269)func_OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeAvailabeForSaleSecuritiesTaxEffect
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 (215)func_OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeAvailabeForSaleSecuritiesTaxEffect
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Other than Temporary Impairment Losses, Investments, Reclassification Adjustment of Noncredit Portion Included in Net Income, Available for Sale Securities, Net of Tax 405func_OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeAvailableForSaleSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 322func_OtherThanTemporaryImpairmentLossesInvestmentsReclassificationAdjustmentOfNoncreditPortionIncludedInNetIncomeAvailableForSaleSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Before Tax Amount 6,560us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 4,089us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI: Net unrealized gains on investments with OTTI, Tax Effect (2,616)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 (1,676)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Net of Tax 3,944us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember		 2,413us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember
Investment Securities -All Other AFS [Member]    
Securities: Unrealized holding losses, Before Tax 14,501us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 (13,879)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Securities: Unrealized holding losses, Tax Effect (5,789)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 5,600us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Securities: Unrealized holding losses, Net of Tax 8,712us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 (8,279)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Securities: Less: gains recognized in income, Before Tax (41)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 78us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Securities: Less: gains recognized in income, Tax Effect 16us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 (31)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Securities: Less: gains recognized in income, Net of Tax (25)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 47us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Before Tax 14,542us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 (13,957)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Tax Effect (5,805)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 5,631us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax 8,737us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember		 (8,326)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossAvailableForSaleMember
Investment Securities HTM [Member]    
Securities: Unrealized holding losses, Before Tax (3,984)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Securities: Unrealized holding losses, Tax Effect 1,589us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Securities: Unrealized holding losses, Net of Tax (2,395)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Securities: Less: gains recognized in income, Before Tax (233)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Securities: Less: gains recognized in income, Tax Effect 93us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Securities: Less: gains recognized in income, Net of Tax (140)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Held to maturity securities: Net unrealized losses on all HTM securities, Before tax (3,751)func_OtherComprehensiveIncomeLossHeldToMaturitySecuritiesAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Held to maturity securities: Net unrealized losses on all HTM securities, Tax 1,496func_OtherComprehensiveIncomeLossHeldToMaturitySecuritiesAdjustmentTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Held to maturity securities: Net unrealized losses on all HTM securities, After tax (2,255)func_OtherComprehensiveIncomeLossHeldToMaturitySecuritiesAdjustmentAfterTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedNetUnrealizedInvestmentGainLossHeldToMaturityMember		  
Pension Plan [Member]    
Unrealized net actuarial gain (loss), Before Tax (10,833)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 4,790us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Unrealized net actuarial gain (loss), Tax Effect 4,320us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (1,919)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Unrealized net actuarial gain (loss), Net of Tax (6,513)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 2,871us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of unrecognized net gain (loss), Before Tax (374)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (532)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of unrecognized net gain (loss), Tax Effect 149us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 213us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of unrecognized net gain (loss), Net of Tax (225)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (319)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of transition asset, Before Tax 39us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 39us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of transition asset, Tax Effect (16)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (16)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of transition asset, Net of Tax 23us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 23us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of prior service costs, Before Tax (12)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (12)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of prior service costs, Tax Effect 5us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 5us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Less: amortization of prior service costs, Net of Tax (7)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (7)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Net plan liability adjustment, Before Tax (10,486)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 5,295us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Net plan liability adjustment, Tax Effect 4,182us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 (2,121)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Net plan liability adjustment, Net of Tax (6,304)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember		 3,174us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
SERP [Member]    
Unrealized net actuarial gain (loss), Before Tax (531)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 170us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Unrealized net actuarial gain (loss), Tax Effect 212us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 (68)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Unrealized net actuarial gain (loss), Net of Tax (319)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 102us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Less: amortization of unrecognized net gain (loss), Before Tax (17)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 (3)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Less: amortization of unrecognized net gain (loss), Tax Effect 7us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 1us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Less: amortization of unrecognized net gain (loss), Net of Tax (10)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 (2)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Less: amortization of prior service costs, Before Tax (20)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 (20)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Less: amortization of prior service costs, Tax Effect 8us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 8us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Less: amortization of prior service costs, Net of Tax (12)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 (12)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Net plan liability adjustment, Before Tax (494)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 193us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Net plan liability adjustment, Tax Effect 197us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 (77)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember
Net plan liability adjustment, Net of Tax $ (297)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember		 $ 116us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= func_AccumulatedSupplementalEmployeeRetirementPlanAdjustmentMember