Residential Mortgage Servicing Rights (Schedule Of Changes In Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 142,973	$ 131,817
Additions for new MSR capitalized	7,041	5,980
Due to changes in model inputs or assumptions	(3,606)	(10,251)
Other	(4,064)	(10,374)
Balance, end of period	$ 142,344	$ 117,172