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Regulatory Capital Matters (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2019
Dec. 31, 2019
Jan. 01, 2016
Regulatory Capital Matters [Abstract]      
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%   0.625%
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%    
Capital Conservative Buffer Phase Period   4 years  
Opening balance in liquidation account   $ 14,300