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Loans and Related Allowance for Credit Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) $ in Thousands | Dec. 31, 2022 USD ($)
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Financing Receivable, Impaired [Line Items] |
Impaired Loans with Specific Allowance: Recorded Investment | $ 345
Impaired Loans with Specific Allowance: Related Allowance | 26
Impaired Loans with No Specific Allowance: Recorded Investment | 6,153
Total Impaired Loans: Recorded Investment | 6,498
Unpaid Principal Balance | 150
Commercial real estate- non owner-occupied [Member] |
Financing Receivable, Impaired [Line Items] |
Impaired Loans with No Specific Allowance: Recorded Investment | 187
Total Impaired Loans: Recorded Investment | 187
Commercial real estate- all other CRE [Member] |
Financing Receivable, Impaired [Line Items] |
Impaired Loans with No Specific Allowance: Recorded Investment | 2,075
Total Impaired Loans: Recorded Investment | 2,075
Acquisition and development- 1-4 family residential construction [Member] |
Financing Receivable, Impaired [Line Items] |
Impaired Loans with No Specific Allowance: Recorded Investment | 210
Total Impaired Loans: Recorded Investment | 210
Acquisition and development- All other A&D [Member] |
Financing Receivable, Impaired [Line Items] |
Impaired Loans with No Specific Allowance: Recorded Investment | 146
Total Impaired Loans: Recorded Investment | 146
Unpaid Principal Balance | 109
Residential mortgage- term [Member] |
Financing Receivable, Impaired [Line Items] |
Impaired Loans with Specific Allowance: Recorded Investment | 345
Impaired Loans with Specific Allowance: Related Allowance | 26
Impaired Loans with No Specific Allowance: Recorded Investment | 3,225
Total Impaired Loans: Recorded Investment | 3,570
Unpaid Principal Balance | 41
Residential mortgage- home equity [Member] |
Financing Receivable, Impaired [Line Items] |
Impaired Loans with No Specific Allowance: Recorded Investment | 310
Total Impaired Loans: Recorded Investment | $ 310

X
- Definition Amount of investment of impaired financing receivables excluding accrued interest with related allowance for credit losses and without a related allowance for credit losses. + References No definition available. + Details
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Namespace Prefix: | func_
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Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance for credit losses related to impaired financing receivable excluding accrued interest. + References No definition available. + Details
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X
- Definition Amount of unpaid principal balance of impaired financing receivables excluding accrued with related allowance for credit losses and without related allowance for credit losses. + References No definition available. + Details
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X
- Definition Amount of investment in impaired financing receivables excluding accrued interest for which there is no related allowance for credit losses. + References No definition available. + Details
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- Definition Amount of investment in impaired financing receivables excluding accrued interest for which there is a related allowance for credit losses. + References No definition available. + Details
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