Loans (Summary of Outstanding Principal Balance and Carrying Amount of Loans Acquired in Business Combination) (Details) - Fauquier Bankshares, Inc [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	$ 296,923
Total acquired loans	287,524
Contractual principal and interest at acquisition		$ 333,854
Total acquired loans		317,966
Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		43,250
Total acquired loans		32,067
Acquired Loans - Purchased Credit Deteriorated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	29,206
Total acquired loans	23,054
Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding principal balance	267,717
Total acquired loans	264,470
Contractual principal and interest at acquisition		290,604
Total acquired loans		285,899
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	9,304
Total acquired loans		13,236
Commercial [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans		630
Commercial [Member] | Acquired Loans - Purchased Credit Deteriorated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	62
Commercial [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	9,242
Total acquired loans		12,606
Real Estate Construction and Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	2,389
Total acquired loans		9,991
Real Estate Construction and Land [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans		1,461
Real Estate Construction and Land [Member] | Acquired Loans - Purchased Credit Deteriorated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	662
Real Estate Construction and Land [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	1,727
Total acquired loans		8,530
1-4 Family Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	153,369
Total acquired loans		173,356
1-4 Family Residential Mortgages [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans		9,076
1-4 Family Residential Mortgages [Member] | Acquired Loans - Purchased Credit Deteriorated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	10,046
1-4 Family Residential Mortgages [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	143,323
Total acquired loans		164,280
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	121,751
Total acquired loans		120,034
Commercial Mortgages [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans		20,828
Commercial Mortgages [Member] | Acquired Loans - Purchased Credit Deteriorated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	12,251
Commercial Mortgages [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	109,500
Total acquired loans		99,206
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	711
Total acquired loans		1,349
Consumer [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans		72
Consumer [Member] | Acquired Loans - Purchased Credit Deteriorated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	33
Consumer [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	$ 678
Total acquired loans		$ 1,277