Loans and Allowance for Credit Losses - Allowance for credit losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for loan losses
Provision for Loan, Lease, and Other Losses	$ (1,628)	$ (98)
Financing Receivable, after Allowance for Credit Loss [Abstract]
Loans receivables	1,941,283	1,870,235
Allowance for loan losses	18,886	18,129	$ 18,871
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	(1,088)	(969)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	217	129
Commercial \| Real Estate
Allowance for loan losses
Provision for Loan, Lease, and Other Losses	(198)	(740)
Financing Receivable, after Allowance for Credit Loss [Abstract]
Loans receivables	1,032,649	1,038,307
Allowance for loan losses	9,236	9,434	10,174
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0
Commercial \| Commercial And Industrial Loan [Member]
Allowance for loan losses
Provision for Loan, Lease, and Other Losses	(2,257)	(501)
Financing Receivable, after Allowance for Credit Loss [Abstract]
Loans receivables	453,393	336,662
Allowance for loan losses	4,523	3,139	3,385
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	(1,078)	(821)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	205	74
Commercial \| Construction
Allowance for loan losses
Provision for Loan, Lease, and Other Losses	(227)	(288)
Financing Receivable, after Allowance for Credit Loss [Abstract]
Loans receivables	153,006	162,367
Allowance for loan losses	1,940	1,713	1,425
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0
Consumer \| Real Estate
Allowance for loan losses
Provision for Loan, Lease, and Other Losses	(721)	(74)
Financing Receivable, after Allowance for Credit Loss [Abstract]
Loans receivables	297,018	325,313
Allowance for loan losses	3,054	3,775	3,822
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	(122)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	1
Consumer \| Nonresidential
Allowance for loan losses
Provision for Loan, Lease, and Other Losses	(63)	(25)
Financing Receivable, after Allowance for Credit Loss [Abstract]
Loans receivables	5,217	7,586
Allowance for loan losses	133	68	$ 65
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	(10)	(26)
FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery		$ 54
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	$ 12

FVCBankcorp, Inc. 10-K/A