Residential Mortgage Servicing Rights (Schedule Of Information Relates To Serviced Loan Portfolio) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Transfers and Servicing [Abstract]
Balance of loans serviced for others	$ 12,755,671	$ 13,026,720	$ 12,276,943
MSR as a percentage of serviced loans	0.97%	0.71%	0.94%