Organization (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 item
Number of wholly-owned non-operating subsidiaries	1
Number of bank locations	4
Lynchburg Virginia [Member]
Limited service bank branch	1
Forest Virginia [Member]
Number of bank locations	1
Madison Heights [Member]
Number of bank locations	1
Amherst Virginia [Member]
Number of bank locations	1
Bedford Virginia [Member]
Number of bank locations	1
Altavista Virginia [Member]
Number of bank locations	1
Appomattox Virginia [Member]
Number of bank locations	1
Charlottesville Virginia [Member]
Number of bank locations	2
Limited service bank branch	1