Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 179,558	$ 102,699	$ 123,615	$ 92,907
Additions for new MSR capitalized	5,194	8,450	20,397	30,845
Changes due to collection/realization of expected cash flows over time	(4,978)	(4,681)	(15,286)	(13,592)
Changes due to valuation inputs or assumptions	16,403	(634)	67,451	(4,326)
Balance, end of period	$ 196,177	$ 105,834	$ 196,177	$ 105,834