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Loans and Allowance for Credit Losses (Narrative) (Details)
12 Months Ended
Dec. 31, 2024
USD ($)
Loan
Dec. 31, 2023
USD ($)
Loan
Dec. 31, 2022
USD ($)
Loan
Jul. 03, 2023
USD ($)
Accounts Notes And Loans Receivable [Line Items]        
Accrued interest $ 109,800,000 $ 124,700,000    
Related party balances of loans 46,200,000 23,500,000    
Related party new loans 25,700,000      
Related party repayments 17,100,000      
Net increase related to related party 14,100,000      
Short-term borrowings $ 639,015,000 $ 1,154,829,000    
Loans receivable       $ 3,100,000,000
Percentage of baseline economic forecast 40.00%      
Weighted average percentage of forecast   40.00% 25.00%  
Loans held for sale (includes $18,929 and $13,269 measured at fair value) $ 21,525,000 $ 26,124,000    
Nonaccrual loans $ 97,335,000 59,036,000    
Real estate in process of foreclosure   26,100,000    
Description of post modification defaults A payment default occurs if the loan is either 90 days or more delinquent or has been charged off as of the end of the period presented      
Modified Loans To Borrowers Experiencing Financial Difficulty [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Nonaccrual loans $ 20,200,000 100,000    
Accruing and nonaccruing 99,500,000      
Unfunded commitment to borrowers related to MEFD or TDR $ 6,900,000 700,000    
Troubled Debt Restructurings [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Accruing and nonaccruing   $ 24,500,000    
Reduced interest rate     $ 100,000  
Troubled Debt Restructurings [Member] | Loans With Other Modifications [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Other modifications     $ 100,000  
Downside Recessionary S-2 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Weighted average percentage of forecast   60.00% 75.00%  
Downside Mild Recessionary S-2 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Percentage of baseline economic forecast 60.00%      
FHLB Borrowings [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Short-term borrowings $ 0 $ 700,000,000    
Weighted Average [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Weighted average interest rate reduction, basis points 0.80%      
Weighted Average [Member] | Other Than Insignificant Payment Delays [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Reportable modification period   3 months    
Residential Mortgages [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Nonaccrual loans $ 44,086,000 $ 26,137,000    
Number of contracts subsequently defaulted | Loan 3      
Loans carried at fair value option $ 18,900,000      
Unpaid principal balance 18,600,000      
Residential Mortgages [Member] | Troubled Debt Restructurings [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Number of contracts subsequently defaulted | Loan     3  
Recorded Investment     $ 200,000  
Residential Mortgages [Member] | Weighted Average [Member] | Term Extension [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Reportable modification period   10 years    
Consumer [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Nonaccrual loans 11,187,000 $ 8,555,000    
Real estate in process of foreclosure 10,500,000 7,100,000    
Real estate acquired through foreclosure 2,000,000 $ 1,600,000    
Consumer [Member] | Troubled Debt Restructurings [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Recorded Investment     $ 300,000  
Consumer [Member] | Weighted Average [Member] | Term Extension [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Reportable modification period   8 years    
Commercial Portfolio Segment [Member] | Troubled Debt Restructurings [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Number of contracts subsequently defaulted | Loan     3  
Commercial Portfolio Segment [Member] | Weighted Average [Member] | Term Extension [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Reportable modification period   10 months    
Total Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Nonaccrual loans 36,145,000 $ 23,068,000    
Commercial Non Real Estate [Member] | Troubled Debt Restructurings [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Number of TDRs subsequently defaulted | Loan     3  
Recorded Investment     $ 3,100,000  
Commercial Non Real Estate [Member] | Residential Mortgages [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Recorded Investment $ 800,000      
Commercial Non Real Estate [Member] | Consumer [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Number of contracts subsequently defaulted | Loan 7 1    
Recorded Investment $ 20,800,000 $ 4,400,000    
Commercial Non Real Estate [Member] | Total Commercial And Industrial [Member] | Commercial Portfolio Segment [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Nonaccrual loans $ 33,418,000 $ 20,840,000