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v3.2.0.727

Assets and Liabilities Subject to Enforceable Master Netting Agreements (Schedule of Liabilities Subject to an enforceable Master Netting Arrangement or Repurchase Agreements) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Interest Rate Swap [Member] |  |
Gross Amounts of Recognized Liabilities | $ 140 | $ 199
Gross Amounts Offset in the Statement of Condition | 0 | 0
Net Amounts of Liabilities Presented in the Statement of Condition | 140 | 199
Gross Amounts Not Offset in the Statement of Condition: Financial Instruments | (140) | (199)
Gross Amounts Not Offset in the Statement of Condition: Cash Collateral Pledged | 0 | 0
Net amount | 0 | 0
Repurchase Agreements [Member] |  |
Gross Amounts of Recognized Liabilities | 28,252 | 39,801
Gross Amounts Offset in the Statement of Condition | 0 | 0
Net Amounts of Liabilities Presented in the Statement of Condition | 28,252 | 39,801
Gross Amounts Not Offset in the Statement of Condition: Financial Instruments | (28,252) | (39,801)
Gross Amounts Not Offset in the Statement of Condition: Cash Collateral Pledged | 0 | 0
Net amount | $ 0 | $ 0

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- Definition Information on the swap contracts and the repurchase agreements related to netting arrangements + References No definition available. + Details
Name: | func_GrossAmountsNotOffsetInStatmentOfConditionCashCollateralPledged
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Information on the swap contracts and the repurchase agreements related to netting arrangements + References No definition available. + Details
Name: | func_GrossAmountsNotOffsetInStatmentOfConditionFinancialInsturments
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Information on the swap contracts and the repurchase agreements related to netting arrangements + References No definition available. + Details
Name: | func_GrossAmountsOfRecognizedLiabilitiesForMasterNettingAgreements
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Information on the swap contracts and the repurchase agreements related to netting arrangements + References No definition available. + Details
Name: | func_GrossAmountsOffsetInStatementOfConditionForMasterNettingAgreements
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Information on the swap contracts and the repurchase agreements related to netting arrangements + References No definition available. + Details
Name: | func_MasterNettingArrangementNetAmount
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Information on the swap contracts and the repurchase agreements related to netting arrangements + References No definition available. + Details
Name: | func_NetAmountsOfLiabilitiesPresentedInStatementOfConditionForMasterNettingAgreements
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_RepurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |