Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 185,017	$ 123,615
Additions for new MSR capitalized	1,601	7,390
Changes due to collection/realization of expected cash flows over time	(4,881)	(5,347)
Changes due to valuation inputs or assumptions	(2,937)	40,149
Balance, end of period	$ 178,800	$ 165,807