XML 47 R37.htm IDEA: XBRL DOCUMENT
v3.21.1

COVID-19 (Narrative) (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 24, 2021 USD ($) loan | Mar. 31, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan | Dec. 31, 2020 USD ($)
Loans Originated In 2020 [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
Number of PPP loan forgiven | loan | 815 |  |  |
Aggregate principal balance of loans forgiven | $ 78,800 |  |  |
Percentage of number of 2020 PPP loans forgiven | 69.40% |  |  |
Percentage of 2020 principal balances of PPP loans forgiven | 53.10% |  |  |
CARES Act [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
PPP loans originated |  |  | $ 148,500 |
Number of PPP loans processed | loan |  |  | 1,174 |
PPP average loan size originated |  |  | $ 162 |
Number of PPP loan forgiven | loan |  |  | 290 |
Aggregate principal balance of loans forgiven |  |  | $ 34,500 |
PPP remaining balance |  |  |  | $ 114,000
CARES II [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
PPP loans originated |  | $ 59,800 |  |
Number of PPP loans processed | loan |  | 675 |  |
PPP average loan size originated |  | $ 89 |  |
Number of PPP loan forgiven | loan |  | 389 |  |
Aggregate principal balance of loans forgiven |  | $ 28,700 |  |
PPP remaining balance |  | $ 85,300 |  |
CARES II [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
PPP loans originated | $ 5,300 |  |  |
Number of PPP loans processed | loan | 149 |  |  |
Number of PPP loan forgiven | loan | 136 |  |  |
Aggregate principal balance of loans forgiven | $ 15,600 |  |  |
COVID-19 Modifications [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
Number of loans in modification | loan | 12 |  |  |
Loans modification amount | $ 5,700 |  |  |
COVID-19 Modifications [Member] | Commercial Loan [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
Number of loans in modification | loan | 5 |  |  |
Loans modification amount | $ 5,000 |  |  |
COVID-19 Modifications [Member] | Commercial Loan [Member] | Hospitality Sector [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
Number of loans in modification | loan | 2 |  |  |
COVID-19 Modifications [Member] | Mortgages [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
Number of loans in modification | loan | 3 |  |  |
Loans modification amount | $ 500 |  |  |
COVID-19 Modifications [Member] | Consumer Loan [Member] | Subsequent Event [Member] |  |  |  |
Significant Event [Line Items] |  |  |  |
Number of loans in modification | loan | 4 |  |  |
Loans modification amount | $ 200 |  |  |

X
- Definition Number Of 2020 Paycheck Protection Program Loans Forgiven Percent + References No definition available. + Details
Name: | func_NumberOf2020PaycheckProtectionProgramLoansForgivenPercent
Namespace Prefix: | func_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Paycheck Protection Program Loan Applications Approved + References No definition available. + Details
Name: | func_NumberOfPaycheckProtectionProgramLoanApplicationsApproved
Namespace Prefix: | func_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Paycheck Protection Program Loan Forgiven + References No definition available. + Details
Name: | func_NumberOfPaycheckProtectionProgramLoanForgiven
Namespace Prefix: | func_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Paycheck Protection Program Average Loan Size + References No definition available. + Details
Name: | func_PaycheckProtectionProgramAverageLoanSize
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Paycheck Protection Program Loan Remaining Balance + References No definition available. + Details
Name: | func_PaycheckProtectionProgramLoanRemainingBalance
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Paycheck Protection Program Loans Originated + References No definition available. + Details
Name: | func_PaycheckProtectionProgramLoansOriginated
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage Of 2020 Principal Balances Of Paycheck Protection Program Loans Forgiven + References No definition available. + Details
Name: | func_PercentageOf2020PrincipalBalancesOfPaycheckProtectionProgramLoansForgiven
Namespace Prefix: | func_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds From Forgiveness Payments On Ppp Loans + References No definition available. + Details
Name: | func_ProceedsFromForgivenessPaymentsOnPppLoans
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 of financing receivable modified as troubled debt restructuring. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | srt_StatementScenarioAxis=func_LoansOriginatedIn2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=func_CoronavirusAidReliefAndEconomicSecurityActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=func_CoronavirusAidReliefAndEconomicSecurityActTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnusualRiskOrUncertaintyByNatureAxis=func_CovidNineteenPandemicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |