Deposits - Additional Information (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Additional Information
CDARS deposits	$ 23,911,000	$ 28,847,000
Interest-bearing demand deposits	18,614,000	12,885,000
Money market accounts under CDARS program	663,000	2,171,000
Time deposits under CDARS program	4,634,000	13,791,000
Deposits from executive officers, directors, and their affiliates	$ 4,491,000	$ 12,636,000