v3.25.4
Derivative Instruments (Schedule Of Derivative Instruments In Statement Of Financial Position, Fair Value) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Designated as Hedging Instrument | Cash Flow Hedge | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 3,500,000 $ 3,575,000
Swap weighted average terms 2 years 8 months 12 days 2 years 8 months 12 days
Swap weighted average interest rate 3.32% 3.32%
Designated as Hedging Instrument | Cash Flow Hedge | Interest Rate Swap | Other Assets    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 1,475,000 $ 1,675,000
Swap weighted average terms 2 years 4 months 24 days 2 years 2 months 12 days
Swap weighted average interest rate 2.89% 2.95%
Designated as Hedging Instrument | Cash Flow Hedge | Interest Rate Swap | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 2,025,000 $ 1,900,000
Swap weighted average terms 2 years 10 months 24 days 3 years 2 months 12 days
Swap weighted average interest rate 3.64% 3.66%
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 11,298 $ 70,840
Derivative, Fair Value, Net (63) (79)
Not Designated as Hedging Instrument | Interest Rate Lock Commitments | Other Assets    
Derivatives, Fair Value [Line Items]    
Notional Amount 0 11,500
Derivative, Fair Value, Net 0 272
Not Designated as Hedging Instrument | Forward Commitments For Sale Of Mortgage Loans | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount 11,298 59,340
Derivative, Fair Value, Net $ (63) $ (351)