General - Additional Information (Details) - shares	Oct. 01, 2020	Sep. 30, 2020
ASU 2018-13 [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]		true
Virginia National Bankshares Corporation [Member] | Merger Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock holders receive shares for each share	0.6750