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Derivative Instruments and Hedging Activities (Schedule of Derivative Instruments, Effect on Hedging) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Derivative [Line Items]      
Loans, including fees $ 629,557 $ 361,091  
Deposits 173,935 13,659  
Long-term debt 42,529 10,144  
Net interest income 480,751 392,248  
Loans, including fees      
Derivative [Line Items]      
Net interest income   361,091  
Loans, including fees | Cash Flow Hedges      
Derivative [Line Items]      
Pre-tax income (loss) recognized on hedges (39,892)    
Loans, including fees | Fair Value Hedges      
Derivative [Line Items]      
Pre-tax income (loss) recognized on hedges 0    
Amounts related to interest settlements and amortization on derivatives 0    
Recognized on derivatives 0    
Recognized on hedged items 0    
Loans, including fees | Interest rate contracts | Cash Flow Hedges      
Derivative [Line Items]      
Realized gains (losses) reclassified from AOCI, pre-tax, to interest income on loans (39,892) 2,189  
Pre-tax income (loss) recognized on hedges   $ 2,189  
Deposits | Cash Flow Hedges      
Derivative [Line Items]      
Pre-tax income (loss) recognized on hedges 0    
Deposits | Fair Value Hedges      
Derivative [Line Items]      
Pre-tax income (loss) recognized on hedges (3,371)    
Amounts related to interest settlements and amortization on derivatives (3,371)    
Recognized on derivatives (12,057)    
Recognized on hedged items 12,057    
Deposits | Interest rate contracts | Cash Flow Hedges      
Derivative [Line Items]      
Realized gains (losses) reclassified from AOCI, pre-tax, to interest income on loans 0    
Deposits | Interest rate contracts | Fair Value Hedges      
Derivative [Line Items]      
Recognized on hedged items (12,170)   $ 24,227
Long-term debt | Cash Flow Hedges      
Derivative [Line Items]      
Pre-tax income (loss) recognized on hedges 0    
Long-term debt | Fair Value Hedges      
Derivative [Line Items]      
Pre-tax income (loss) recognized on hedges (2,721)    
Amounts related to interest settlements and amortization on derivatives (2,721)    
Recognized on derivatives (3,952)    
Recognized on hedged items 3,952    
Long-term debt | Interest rate contracts | Cash Flow Hedges      
Derivative [Line Items]      
Realized gains (losses) reclassified from AOCI, pre-tax, to interest income on loans 0    
Long-term debt | Interest rate contracts | Fair Value Hedges      
Derivative [Line Items]      
Recognized on hedged items $ (15,396)   $ 19,348