Securities - Securities By Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available for sale at fair value:
Within one year, Amount	$ 242
After one through five years, Amount	1,921
After five through ten years, Amount	13,506
After ten years, Amount	24,094
Securities available for sale	$ 39,763	$ 45,617
Rolling maturity, Yield
Within one year, Yield	3.53%
After one through five years, Yield	4.07%
After five through ten years, Yield	4.43%
After ten years, Yield	2.13%
Total carrying value, Yield	3.02
Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract]
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value	$ 5,151
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	$ 5,151
Debt Securities, Held-to-maturity, Rolling Maturity, Weighted Average Yield [Abstract]
Debt Securities, Held-to-maturity, Maturity, Rolling after Ten Years, Weighted Average Yield	2.29%
Debt Securities Held To Maturity Rolling Maturity Weighted Average Yield	2.29%
Equity securities at fair value:
After ten years, Amount	$ 4,893
Estimated fair value	$ 4,893	1,954
After ten years, Yield	2.17%
Total carrying value, Yield	2.17%
U.S. Government sponsored entities
Available for sale at fair value:
Securities available for sale		2,003
Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract]
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value	$ 2,000
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	$ 2,000
Debt Securities, Held-to-maturity, Rolling Maturity, Weighted Average Yield [Abstract]
Debt Securities, Held-to-maturity, Maturity, Rolling after Ten Years, Weighted Average Yield	2.49%
Debt Securities Held To Maturity Rolling Maturity Weighted Average Yield	2.49%
State and political subdivisions
Available for sale at fair value:
Within one year, Amount	$ 201
After one through five years, Amount	425
After ten years, Amount	436
Securities available for sale	$ 1,062	2,969
Rolling maturity, Yield
Within one year, Yield	3.90%
After one through five years, Yield	2.91%
After ten years, Yield	2.74%
Total carrying value, Yield	3.03
Residential mortgage backed securities
Available for sale at fair value:
Within one year, Amount	$ 41
After one through five years, Amount	496
After five through ten years, Amount	1,010
After ten years, Amount	9,461
Securities available for sale	$ 11,008	17,410
Rolling maturity, Yield
Within one year, Yield	1.70%
After one through five years, Yield	2.93%
After five through ten years, Yield	2.27%
After ten years, Yield	1.94%
Total carrying value, Yield	2.01
Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract]
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value	$ 3,151
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	$ 3,151
Debt Securities, Held-to-maturity, Rolling Maturity, Weighted Average Yield [Abstract]
Debt Securities, Held-to-maturity, Maturity, Rolling after Ten Years, Weighted Average Yield	2.17%
Debt Securities Held To Maturity Rolling Maturity Weighted Average Yield	2.17%
Corporate and other securities
Available for sale at fair value:
After one through five years, Amount	$ 1,000
After five through ten years, Amount	12,496
After ten years, Amount	14,197
Securities available for sale	$ 27,693	$ 23,235
Rolling maturity, Yield
After one through five years, Yield	5.13%
After five through ten years, Yield	4.61%
After ten years, Yield	2.24%
Total carrying value, Yield	3.41