Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Other assets	$ 32,056	$ 12,771
Other liabilities	(31,772)	(12,729)
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	31,135	11,993
Other liabilities	(31,343)	(11,993)
Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	36	73
Other liabilities	(36)	(73)
Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	1
Other liabilities	(272)	(195)
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	5	437
Other liabilities	(10)	(430)
Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	876	263
Other liabilities	0	0
Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	0
Other liabilities	0	0
Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	2	4
Other liabilities	$ (111)	$ (38)