Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 185,017	$ 123,615	$ 92,907
Additions for new MSR capitalized	5,347	24,137	38,522
Changes due to collection/realization of expected cash flows over time	(17,694)	(20,272)	(18,903)
Changes due to valuation inputs or assumptions	(6,122)	57,537	11,089
Balance, end of period	$ 109,243	$ 185,017	$ 123,615
Servicing Asset, Fair Value, Change in Fair Value, Other, Statement of Income or Comprehensive Income [Extensible Enumeration]	Balance, end of period	Balance, end of period	Balance, end of period