Supplemental Cash Flow Information (Schedule Of Noncash Activities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Cash Flow Reclassification of Certain Items		$ 70,800	$ 74,000
Real Estate Owned, Transfer to Real Estate Owned	$ 14,632	11,924	25,189
Transfer of Portfolio Loans and Leases to Held-for-sale	(50,353)	(5,048)	(26,272)
Amortized Cost of Securities Reclassified from HTM to AFS	0	79,276	0
Available for sale securities purchased, not settled	$ 395,079	$ 0	$ 0