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Loans (Summary of Changes in Accretable Yield of Loans Classified as Purchased Credit Impaired) (Details) - Fauquier Bankshares, Inc [Member] - USD ($)
$ in Thousands
12 Months Ended
Apr. 01, 2021
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Additions $ 15,499 $ 15,499
Accretion   (1,757)
Reclassification from (to) nonaccretable difference $ (33,712)  
Accretable yield, end of period   $ 13,742