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Regulatory Capital (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 15, 2020
Jan. 01, 2019
Jan. 01, 2018
Jan. 01, 2017
Jan. 01, 2016
Dec. 31, 2019
Dec. 31, 2018
Common equity Tier 1 capital to risk-weighted assets minimum ratio           4.50%  
Total Capital to risk-weighted assets           8.00%  
Tier 1 leverage ratio           4.00%  
Capital conservation buffer percentage increase   0.625% 0.625% 0.625% 0.625%    
Capital conversion buffer percentage   2.50%          
PCA well capitalized           5.00%  
Minimum              
Minimum ratio of Tier 1 capital to risk-weighted assets           4.00%  
Maximum              
Minimum ratio of Tier 1 capital to risk-weighted assets           6.00%  
Subsequent Event              
Tier 2 Capital to RWA, subordinated debt redemption within reporting period 12.64%            
Subordinated Debt              
Subordinated notes interest rate           6.25% 6.25%
Subordinated Debt | Subsequent Event              
Repayments of subordinated debt $ 23.0            
Subordinated notes interest rate 6.25%            
Bank | Subsequent Event              
Tier 2 Capital to RWA, subordinated debt redemption within reporting period 12.39%            
Common Tier 1 Capital to RWA, subordinated debt redemption within reporting period 11.66%            
Tier 1 Capital to AA (Leverage), subordinated debt redemption within reporting period 9.86%