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Other Real Estate Owned, Net (Schedule of Activity in OREO Valuation Allowance) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Other Real Estate Owned, Net [Abstract] |  |  |  |
Balance beginning of period | $ 453 | $ 1,004 | $ 453 | $ 1,010
Fair value write-down |  | (164) |  | (160)
Sales of OREO |  | (297) |  | (307)
Balance at end of period | $ 453 | $ 543 | $ 453 | $ 543

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- 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
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Namespace Prefix: | func_
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Balance Type: | debit
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- References No definition available. + Details
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Balance Type: | na
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- 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
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- 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
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