Derivative Instruments (Change In Fair Value Of Derivative Instruments) (Details) - Non-hedging interest rate derivatives: - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Assets | Other Income | Customer Back-to-Back Swap Program
Derivatives, Fair Value [Line Items]
Change in Fair Value Non-Hedging Interest Rate Derivatives:	$ 13,565	$ 26,296	$ 8,088	$ 44,821
Other Liabilities | Other Income | Customer Back-to-Back Swap Program
Derivatives, Fair Value [Line Items]
Change in Fair Value Non-Hedging Interest Rate Derivatives:	(13,565)	(26,296)	(8,088)	(44,821)
Other Liabilities | Other Expense
Derivatives, Fair Value [Line Items]
Change in Fair Value Non-Hedging Interest Rate Derivatives:	$ 132	$ 422	$ 65	$ 1,310