Capital Ratios (Details)	Dec. 31, 2019	Dec. 31, 2018
Tier 1 capital (to risk-weighted assets), Actual Ratio	11.20%	12.70%
Excess total capital ratio	2.70%
Capital conservation buffer ratio	2.50%
minimum regulatory total capital ratio	8.00%
Capital to Risk Weighted Assets	13.20%	13.90%
Excess common equity tier 1 capital ratio	3.20%
Minimum regulatory common equity tier 1 capital ratio	4.50%
Common Equity Tier One Capital Ratio	10.20%	11.70%
Excess tier 1 capital ratio	2.70%
Minimum regulatory tier 1 capital ratio	6.00%