Derivative Instruments (Change In Fair Value Of Derivative Instruments) (Details) - Non-hedging interest rate derivatives: - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other assets | Other Income
Derivatives, Fair Value [Line Items]
Change in Fair Value Non-Hedging Interest Rate Derivatives:	$ 3,807	$ 5,128	$ 41,718	$ 2,249
Other Liabilities | Other Income
Derivatives, Fair Value [Line Items]
Change in Fair Value Non-Hedging Interest Rate Derivatives:	(3,807)	(5,128)	(41,718)	(2,249)
Other Liabilities | Other Expense
Derivatives, Fair Value [Line Items]
Change in Fair Value Non-Hedging Interest Rate Derivatives:	$ 10	$ 97	$ 183	$ 154