Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 92,907	$ 115,010	$ 169,025
Additions for new MSR capitalized	38,522	51,000	25,169
Sale of MSR assets	0	0	(34,401)
Changes due to collection/realization of expected cash flows over time	(18,903)	(19,680)	(25,408)
Changes due to valuation inputs or assumptions	11,089	(53,423)	(19,375)
Balance, end of period	$ 123,615	$ 92,907	$ 115,010