Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period		$ 172,929	$ 179,558	$ 185,017	$ 123,615
Additions for new MSR capitalized		1,658	5,194	4,427	20,397
Sale of MSR assets	$ (57,500)	(57,454)	0	(57,454)	0
Changes due to collection/realization of expected cash flows over time		(4,801)	(4,978)	(14,479)	(15,286)
Changes due to valuation inputs or assumptions		5,308	16,403	129	67,451
Balance, end of period	$ 117,640	$ 117,640	$ 196,177	$ 117,640	$ 196,177