Goodwill and Intangible Assets - Deposits Purchased Premium and Discount (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Deposits Purchased Premium and Discount
Balance at the end of the period	$ (28)
Deposits Purchased Premium (Discount) Net
Deposits Purchased Premium and Discount
Accretion period	5 years
Balance at the beginning of the period	$ (31)	$ 27
Amortization, net	3	(20)
Balance at the end of the period	$ (28)	(31)
Virginia Partners Bank | Deposits Purchased Premium (Discount) Net
Deposits Purchased Premium and Discount
Partners acquisition		$ (38)