XML 64 R54.htm IDEA: XBRL DOCUMENT
v3.21.2

Other Real Estate Owned, Net (Schedule of Activity in OREO Valuation Allowance) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Other Real Estate Owned, Net [Abstract] |  |  |  |
Balance beginning of period | $ 1,004 | $ 1,780 | $ 1,010 | $ 1,790
Fair value write-down | (164) | 13 | (160) | 39
Sales of OREO | (297) | (59) | (307) | (95)
Balance at end of period | $ 543 | $ 1,734 | $ 543 | $ 1,734

X
- Definition The charge (credit) against earnings in the period to reduce (increase) the carrying amount of real property to fair value. + References No definition available. + Details
Name: | func_ImpairmentRecoveryOfRealEstate
Namespace Prefix: | func_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RealEstateOwnedDisclosureOfDetailedComponentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For each period for which an income statement is required, disclosure of the changes in the allowance, including balances at end of period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_RealEstateOwnedValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the valuation allowance for real estate owned that was applied in the period against the carrying amount of real estate owned that was sold, written down or written off. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_RealEstateOwnedValuationAllowanceAmountsApplied
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration