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Regulatory Matters (Narrative) (Details)
$ in Millions
 1 Months Ended 12 Months Ended
Jan. 01, 2020
USD ($)
Oct. 31, 2020
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]              
Common equity Tier 1 ("CETI") capital ratio     0.045%     0.045%  
Minimum Tier 1 capital to risk-weighted assets ratio     0.060     0.060  
Minimum total capital to risk-weighted assets ratio     0.080     0.080  
Minimum Tier 1 leverage ratio     0.040     0.040  
CETI capital ratio     0.065%     0.065%  
Tier 1 ratio     0.080     0.080  
Total risk based capital ratio     0.10     0.100  
Tier 1 leverage ratio     5.00%        
Capital conservation buffer     2.50%        
CBLR leverage ratio     8.00%        
Dividends | $     $ 12.1     $ 10.7 $ 9.3
Growth Act [Member] | Minimum [Member]              
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]              
Capital conservation buffer 9.00%            
Growth Act [Member] | Maximum [Member]              
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]              
CBLR total consolidated assets | $ $ 10,000.0            
Forecast [Member]              
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]              
CBLR leverage ratio       9.00% 8.50%    
Common Stock [Member]              
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]              
Plan to repurchase (in shares) | shares   1,000,000          
Repurchase of common stock (in shares) | shares [1]     724,741        
[1] Share amounts related to periods prior to the date of the Conversion (October 16, 2019) have been restated to give the retroactive recognition to the exchange ratio applied in the Conversion (2.0212-to-one) (see Note 1).