XML 62 R52.htm IDEA: XBRL DOCUMENT
v3.21.2

Loans And Related Allowances For Loan Losses (TDRs) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) contract | Jun. 30, 2020 USD ($) contract | Jun. 30, 2021 USD ($) loan contract | Jun. 30, 2020 USD ($) contract
Troubled Debt Restructuring [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | loan |  |  | 14 |
Temporary Rate Modification [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 1 |  | 1
Recorded Investment | $ |  | $ 46 |  | $ 46
Extension Of Maturity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract | 1 | 2 | 1 | 2
Recorded Investment | $ | $ 109 | $ 447 | $ 109 | $ 447
Modification Of Payment And Other Terms [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 3 |  | 3
Recorded Investment | $ |  | $ 2,471 |  | $ 2,471
Commercial real estate- non owner-occupied [Member] | Extension Of Maturity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract | 1 |  | 1 |
Recorded Investment | $ | $ 109 |  | $ 109 |
Commercial real estate- all other CRE [Member] | Modification Of Payment And Other Terms [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 1 |  | 1
Recorded Investment | $ |  | $ 2,226 |  | $ 2,226
Acquisition and development- All other A&D [Member] | Extension Of Maturity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 1 |  | 1
Recorded Investment | $ |  | $ 217 |  | $ 217
Residential mortgage- term [Member] | Temporary Rate Modification [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 1 |  | 1
Recorded Investment | $ |  | $ 46 |  | $ 46
Residential mortgage- term [Member] | Extension Of Maturity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 1 |  | 1
Recorded Investment | $ |  | $ 230 |  | $ 230
Residential mortgage- term [Member] | Modification Of Payment And Other Terms [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of contracts | contract |  | 2 |  | 2
Recorded Investment | $ |  | $ 245 |  | $ 245

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

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=func_TemporaryRateModificationMember
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: |

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_AllOtherAcquisitionAndDevelopmentMember
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: |