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Loans and Leases (COVID-19 Loan Modifications Not Considered TDRS) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
contract
Dec. 31, 2020
contract
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 19 25
CARES Act | Active Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 3,000,000  
LOAN VOLUME $ 2.0  
CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 390,000,000  
LOAN VOLUME $ 835.6  
DEFERRED PRINCIPAL AMOUNT 1.2  
DEFERRED INTEREST AMOUNT $ 6.3  
Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 9 3
Commercial | CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 153,000,000  
LOAN VOLUME $ 590.5  
DEFERRED PRINCIPAL AMOUNT 0.1  
DEFERRED INTEREST AMOUNT $ 4.0  
Commercial | Commercial and Institutional    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 6 3
Commercial | Commercial and Institutional | CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 73,000,000  
LOAN VOLUME $ 199.8  
DEFERRED PRINCIPAL AMOUNT 0.1  
DEFERRED INTEREST AMOUNT $ 1.6  
Commercial | Commercial Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 3  
Commercial | Commercial Real Estate | CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 80,000,000  
LOAN VOLUME $ 390.7  
DEFERRED PRINCIPAL AMOUNT 0.0  
DEFERRED INTEREST AMOUNT $ 2.4  
Personal    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 10 22
Personal | CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 237,000,000  
LOAN VOLUME $ 245.1  
DEFERRED PRINCIPAL AMOUNT 1.1  
DEFERRED INTEREST AMOUNT $ 2.3  
Personal | Private Client | CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 29,000,000  
LOAN VOLUME $ 143.1  
DEFERRED PRINCIPAL AMOUNT 0.0  
DEFERRED INTEREST AMOUNT $ 1.0  
Personal | Residential Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 10 22
Personal | Residential Real Estate | CARES Act | Completed Deferral    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
NUMBER OF COVID-19 RELATED MODIFICATIONS | contract 208,000,000  
LOAN VOLUME $ 102.0  
DEFERRED PRINCIPAL AMOUNT 1.1  
DEFERRED INTEREST AMOUNT $ 1.3