Loans (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) Loan	Dec. 31, 2022 USD ($) Loan
Loans And Leases Receivable Disclosure [Line Items]
Accrued interest receivable	$ 4,300	$ 2,600
Unamortized premium	4,600	1,400
Net deferred loan costs and fees	$ (2,500)	(755)
Commercial loan guarantee by SBA and USDA	100.00%
Loans	$ 1,092,665	936,415
Deposit account overdrafts	$ 252	180
Number of non accrual loans required allowance of credit loss | Loan	1
Due to collateral value shortfall	$ 4
Nonaccrual loans	1,852	673
Charged off	$ 721	1,255
ASU 2022-02 [Member]
Loans And Leases Receivable Disclosure [Line Items]
Number of non accrual loans required allowance of credit loss | Loan	2
Nonaccrual loans	$ 470
1-4 family residential-purchased [Member]
Loans And Leases Receivable Disclosure [Line Items]
Nonaccrual loans	$ 1,438	$ 673
Number of secured loans | Loan	0	0
1-4 family residential-purchased [Member] | Residential Mortgages [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans	$ 7,800	$ 8,300
Student Loans Purchased [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loans	20,100	25,200
Purchased Impaired Loan [Member] | Fauquier Bankshares, Inc [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loan receivable at fair value net	6,200	11,200
Purchased Performing Loans [Member] | Fauquier Bankshares, Inc [Member]
Loans And Leases Receivable Disclosure [Line Items]
Loan receivable at fair value net	$ 3,200	$ 4,700