Capital Requirements (Narrative) (Details)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 17, 2019 USD ($)	Aug. 30, 2018 USD ($)
Assets	$ 1,646,017,000	$ 1,623,359,000
Common equity Tier 1 capital, minimum capital requirement, ratio	4.50%
Minimum capital conservation buffer percentage	2.50%	2.50%
Common equity tier one capital ratio of risk-weighted assets	7.00%
Tier 1 capital, minimum capital requirement, ratio	0.06
Tier 1 capital ratio of risk-weighted assets	8.50%
Total capital, minimum capital requirement, ratio	0.08
Capital conservation buffer to risk weighted assets	10.50%
Total capital, minimum capital requirement, ratio	0.04
Minimum [Member]
Tier 1 leverage ratio			0.09
Maximum [Member]
Tier 1 leverage capital			$ 10,000,000,000
Well Capitalized [Member] | Minimum [Member]
Common equity Tier 1 capital, minimum capital requirement, ratio	6.50%
Tier 1 capital, minimum capital requirement, ratio	0.08
Capital conservation buffer to risk weighted assets	10.00%
Total capital, minimum capital requirement, ratio	0.05
SBHC Policy Statement [Member]
Assets				$ 3,000,000,000
Threshold [Member]
Assets				$ 1,000,000,000