Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 169,025	$ 153,151
Additions for new MSR capitalized	3,887	6,530
Due to changes in model inputs or assumptions (1)	(8,874)	14,933
Other (2)	(5,092)	(9,854)
Balance, end of period	$ 158,946	$ 164,760