Financial Instruments with Off-Balance Sheet Risk (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Financial Instruments with Off-Balance Sheet Risk
Cash on deposit in correspondent banks exceeding the federally insured limits	$ 13,600	$ 6,800
Loans, net of allowance for credit losses of $17.9 million and $18.1 million at September 30, 2025 and December 31, 2024, respectively	1,840,479	1,852,106
Deposits	$ 1,977,882	$ 1,870,605
Cannabis customer deposit as Persentage of Total Depost	0.064	0.053
Cannabis customer Loans as Persentage of Total Loans	0.082	0.058
Cannabis customer business
Financial Instruments with Off-Balance Sheet Risk
Deposits	$ 127,000	$ 100,000
Cannabis customer business
Financial Instruments with Off-Balance Sheet Risk
Loans, net of allowance for credit losses of $17.9 million and $18.1 million at September 30, 2025 and December 31, 2024, respectively	151,600	108,300
Commitments to grant loans \| Contract credit risk
Financial Instruments with Off-Balance Sheet Risk
Financial instruments outstanding	200,007	24,989
Unused commitments to fund loans and lines of credit \| Contract credit risk
Financial Instruments with Off-Balance Sheet Risk
Financial instruments outstanding	156,453	171,752
Commercial and standby letters of credit \| Contract credit risk
Financial Instruments with Off-Balance Sheet Risk
Financial instruments outstanding	$ 9,476	$ 25,221
Letters of credit expiration period (in years)	1 year

FVCBankcorp, Inc. 10-Q