Residential Mortgage Servicing Rights (Schedule Of Information Relates To Serviced Loan Portfolio) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Transfers and Servicing [Abstract]
Balance of loans serviced for others	$ 13,047,266	$ 11,590,310	$ 4,362,499
MSR as a percentage of serviced loans	1.01%	1.01%	1.09%