Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 142,344	$ 117,172	$ 142,973	$ 131,817
Additions for new MSR capitalized	7,819	8,863	14,860	14,843
Due to changes in model inputs or assumptions	(4,573)	(6,836)	(8,179)	(17,087)
Other	(3,758)	(7,104)	(7,822)	(17,478)
Balance, end of period	$ 141,832	$ 112,095	$ 141,832	$ 112,095