Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Other assets	$ 9,885	$ 13,566
Other liabilities	(7,398)	(13,339)
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	8,827	12,987
Other liabilities	(7,069)	(12,987)
Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	51	78
Other liabilities	(51)	(78)
Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	57	65
Other liabilities	(138)	(156)
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	42	66
Other liabilities	(1)	(4)
Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	903	355
Other liabilities	0	(6)
Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	4	0
Other liabilities	0	(63)
Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	15
Other liabilities	$ (139)	$ (45)