Loans (Summary of Outstanding Principal Balance and Carrying Amount of Loans Acquired in Business Combination) (Details) - Fauquier Bankshares, Inc [Member] - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Apr. 01, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition	$ 371,527	$ 448,780	$ 136,476
Total acquired loans	354,024	430,315
Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition	56,178	76,608
Total acquired loans	43,926	64,383
Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition	315,349	372,172
Total acquired loans	310,098	365,932
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	16,975	29,059
Commercial [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		994
Total acquired loans	702
Commercial [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		28,065
Total acquired loans	16,273
Real Estate Construction and Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	15,672	32,873
Real Estate Construction and Land [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		18,576
Total acquired loans	6,539
Real Estate Construction and Land [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		14,297
Total acquired loans	9,133
1-4 Family Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	185,034	210,728
1-4 Family Residential Mortgages [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		16,020
Total acquired loans	11,900
1-4 Family Residential Mortgages [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		194,708
Total acquired loans	173,134
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	134,574	155,313
Commercial Mortgages [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		28,675
Total acquired loans	24,694
Commercial Mortgages [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		126,638
Total acquired loans	109,880
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total acquired loans	1,769	2,342
Consumer [Member] | Acquired Loans - Purchased Credit Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		118
Total acquired loans	91
Consumer [Member] | Acquired Loans - Purchased Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual principal and interest at acquisition		$ 2,224
Total acquired loans	$ 1,678