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Regulatory Capital (Narrative) (Details)
6 Months Ended
Jun. 30, 2020
Jan. 01, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital conservation buffer, phase in period 3 years  
Capital conversion buffer percentage   2.50%
Minimum    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common equity Tier 1 capital to risk-weighted assets minimum ratio 4.50%  
Minimum ratio of Tier 1 capital to risk-weighted assets 6.00%  
Total Capital to risk-weighted assets 8.00%  
Tier 1 leverage ratio 4.00%