Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Principles - Securities, Loans and Leases and Allowance for Credit Losses (Details)

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Summary of Significant Accounting Principles - Securities, Loans and Leases and Allowance for Credit Losses (Details) - portfolio_segment
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Past Due [Line Items]    
Minimum percentage of principal collected and disposed to be treated as matured 85.00%  
Number of portfolio segments 3  
Threshold period past due for nonperforming status of financing receivables 90 days 90 days
Threshold period of collateral-dependent troubled debt restructurings 180 days  
Consumer real estate    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 180 days  
Consumer real estate | Death, Bankruptcy or Fraud    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 60 days  
Consumer real estate | Residential mortgage    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for nonperforming status of financing receivables 90 days  
Consumer real estate | Junior Lien Home Equity Financing Receivable    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for nonperforming status of financing receivables 90 days  
Consumer Portfolio Segment    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for nonperforming status of financing receivables 90 days  
Threshold period past due for write-off of financing receivable 120 days  
Consumer Portfolio Segment | Chapter Seven Bankruptcy    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 60 days  
Consumer Portfolio Segment | Credit Card and Other Unsecured Consumer Loans    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 180 days  
Consumer Portfolio Segment | Credit Card and Other Unsecured Consumer Loans | Death, Bankruptcy or Fraud    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 60 days  
Consumer Portfolio Segment | Consumer Vehicle Loans    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 90 days  
Consumer Portfolio Segment | Consumer Vehicle Loans | Death, Bankruptcy or Fraud    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for write-off of financing receivable 60 days  
Commercial    
Financing Receivable, Past Due [Line Items]    
Threshold period past due for nonperforming status of financing receivables 90 days