XML 67 R57.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Loans and Related Allowance for Loan Losses (Narrative) (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2017 USD ($) contract | Jun. 30, 2016 USD ($) contract | Jun. 30, 2017 USD ($) contract | Jun. 30, 2016 USD ($) contract | Dec. 31, 2016 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |
Commercial amount benchmark minimum for internal annual review |  |  | $ 500,000 |  |  |  |  |
Commercial amount benchmark minimum for annual review by independent reviewer |  |  | 1,000,000 |  |  |  |  |
Commercial amount benchmark minimum criticized relationships for annual review by independent reviewer |  |  | 500,000 |  |  |  |  |
Nonaccrual loans | $ 9,472,000 |  | 9,472,000 |  | $ 13,946,000 |  |  |
Decrease in non-accrual balance due to charge-offs |  |  | 2,900,000 |  |  |  |  |
Decrease in non-accrual balance due to movement to OREO |  |  | 800,000 |  |  |  |  |
Redution in ALL due to change in impairment evaluation method |  | $ 486 |  | $ 2,873 |  |  |  |
Loans in process of foreclosure | 300,000 |  | $ 300,000 |  | $ 500,000 |  |  |
Accruing loans past due 30 days or greater as percent of loan portfolio |  |  | 0.68% |  | 0.67% |  |  |
Total allowance for loan losses | 9,922,000 | $ 12,678,000 | $ 9,922,000 | $ 12,678,000 | $ 9,918,000 | $ 11,583,000 | $ 12,256,000 | $ 11,922,000
Partial Charge Off [Member] |  |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |
Nonaccrual loans | $ 5,500,000 |  | $ 5,500,000 |  | 11,100,000 |  |  |
New TDR [Member] |  |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |
Financing receivable, modifications, number of contracts | contract | 0 | 1 | 0 | 3 |  |  |  |
Pre Existing TDR Loans Remodified After Maturity [Member] |  |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |
Financing receivable, modifications, number of contracts | contract | 0 |  | 2 | 1 |  |  |  |
Commercial real estate- non owner-occupied [Member] |  |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |
Nonaccrual loans | $ 5,000,000 |  | $ 5,000,000 |  | 6,381,000 |  |  |
Commercial and industrial [Member] |  |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |  |
Nonaccrual loans | 0 |  | 0 |  | 0 |  |  |
Total allowance for loan losses | $ 836,000 | $ 737,000 | $ 836,000 | $ 737,000 | $ 858,000 | $ 936,000 | $ 758,000 | $ 722,000

X
- Definition Commercial amount benchmark minimum criticized relationships for annual review by independent reviewer. + References No definition available. + Details
Name: | func_CommercialAmountBenchmarkMinimumCriticizedRelationshipsForAnnualReviewByIndependentReviewer
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Commerical amount benchmark minimum for internal annual review. + References No definition available. + Details
Name: | func_CommericalAmountBenchmarkMinimumForAnnualReview
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Commerical amount benchmark minimum for annual review by independent reviewer. + References No definition available. + Details
Name: | func_CommericalAmountBenchmarkMinimumForAnnualReviewByIndependentReviewer
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the decrease in non-accrual balance of loans as the result of movement to other real estate owned (OREO) + References No definition available. + Details
Name: | func_DecreaseInNonAccrualBalanceDueToMovementToOreo
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of other addition (reduction) in allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesAdjustmentsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percent of financing receivables past due. + References No definition available. + Details
Name: | us-gaap_FinancingReceivablePercentPastDue
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL49126937-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 + Details
Name: | us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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