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Regulatory Matters (Regulatory Capital Levels And Related Ratios) (Parenthetical) (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Fourth Year Phased In [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Minimum capital required including percentage of capital conservation buffer 2.50%  
Third Year Phased In [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Minimum capital required including percentage of capital conservation buffer   1.875%