Regulatory Capital Matters (Narrative) (Details) - USD ($) $ in Thousands	Oct. 16, 2020	Jan. 01, 2019	Sep. 30, 2020
Future percent of common equity to risk-weighted assets		2.50%
Common Equity Tier 1 capital to risk-weighted assets, ratio		4.50%
Capital conservation buffer		2.50%
Common Equity Tier 1 capital to risk weighted assets, upon full implementation, ratio		7.00%
Tier 1 Capital To Risk Weighted Assets Ratio		6.00%
Tier 1 Capital To Risk Weighted Assets Upon Full Implementation Ratio		8.50%
Total Capital To Risk Weighted Assets Ratio		8.00%
Total Capital To Risk Weighted Assets Upon Full Implementation Ratio		10.50%
Minimum Leverage Ratio Based On Required Basel 3 Rules		4.00%
Opening balance in liquidation account			$ 14,300
Subsequent Event [Member]
Dividends payable first divided payment	Nov. 16, 2020