Residential Mortgage Servicing Rights (Schedule Of Information Relates To Serviced Loan Portfolio) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Balance of loans serviced for others	$ 13,564,242	$ 13,047,266
MSR as a percentage of serviced loans	0.83%	1.01%