Residential Mortgage Servicing Rights (Schedule Of Information Relates To Serviced Loan Portfolio) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Transfers and Servicing [Abstract]
Balance of residential mortgage loans serviced for others	$ 12,693,451	$ 11,590,310
MSR as a percentage of serviced loans	0.98%	1.01%