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Regulatory Capital (Narrative) (Details)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2021
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Jan. 01, 2020
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]                
Common equity Tier 1 ("CETI") capital ratio   0.045   0.045   0.045    
Minimum Tier 1 capital to risk-weighted assets ratio   0.060   0.060   0.060    
Minimum total capital to risk-weighted assets ratio   0.080   0.080   0.080    
Minimum Tier 1 leverage ratio   0.040   0.040   0.040    
CETI capital ratio   0.065   0.065   0.065    
Tier 1 ratio   0.080   0.080   0.080    
Total risk based capital ratio   0.10   0.10   0.100    
Tier 1 leverage ratio   0.05%   0.05%        
Capital conservation buffer       2.50%        
Dividends | $   $ 11.2   $ 11.2   $ 16.1 $ 12.1  
Growth Act [Member] | Minimum [Member]                
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]                
CBLR leverage ratio               9.00%
Growth Act [Member] | Maximum [Member]                
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]                
CBLR total consolidated assets | $               $ 10,000.0
Common Stock [Member]                
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]                
Repurchase of common stock (in shares)   85,205 395,884 180,434 869,099      
Repurchase Program [Member]                
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]                
Plan to repurchase (in shares) 1,400,000              
Repurchase of common stock (in shares)       180,434