XML 91 R78.htm IDEA: XBRL DOCUMENT
v3.19.1

Loans And Related Allowances For Loan Losses (Modification of Troubled Debt Restructuring by Class) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) contract | Dec. 31, 2017 USD ($) contract
Temporary Rate Modification [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Commercial and industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Residential mortgage- term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Residential mortgage- home equity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Temporary Rate Modification [Member] | Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Extension Of Maturity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 2 | 3
Recorded Investment | $ | $ 566 | $ 942
Extension Of Maturity [Member] | Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Extension Of Maturity [Member] | Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 0
Recorded Investment | $ | $ 179 | $ 0
Extension Of Maturity [Member] | Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 0
Recorded Investment | $ | $ 387 | $ 0
Extension Of Maturity [Member] | Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 1
Recorded Investment | $ | $ 0 | $ 244
Extension Of Maturity [Member] | Commercial and industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Extension Of Maturity [Member] | Residential mortgage- term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 2
Recorded Investment | $ | $ 0 | $ 698
Extension Of Maturity [Member] | Residential mortgage- home equity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Extension Of Maturity [Member] | Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Modification Of Payment And Other Terms [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 4 | 0
Recorded Investment | $ | $ 793 | $ 0
Modification Of Payment And Other Terms [Member] | Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 3 | 0
Recorded Investment | $ | $ 358 | $ 0
Modification Of Payment And Other Terms [Member] | Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Modification Of Payment And Other Terms [Member] | Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Modification Of Payment And Other Terms [Member] | Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Modification Of Payment And Other Terms [Member] | Commercial and industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Modification Of Payment And Other Terms [Member] | Residential mortgage- term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 0
Recorded Investment | $ | $ 435 | $ 0
Modification Of Payment And Other Terms [Member] | Residential mortgage- home equity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0
Modification Of Payment And Other Terms [Member] | Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 0 | 0
Recorded Investment | $ | $ 0 | $ 0

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings during the period. + References No definition available. + Details
Name: | func_NumberOfContracts
Namespace Prefix: | func_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings during the period. + References No definition available. + Details
Name: | func_RecordedInvestment
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=func_TemporaryRateModificationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=func_CommercialRealEstateNonOwnerOccupiedFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=func_OtherCommercialRealEstateFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=func_ResidentialRealEstateConstructionFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=func_OtherAcquiredAndDevelopmentFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=func_ExtensionOfMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=func_ModificationOfPaymentAndOtherTermsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |