Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Other assets	$ 27,568	$ 12,771
Other liabilities	(27,195)	(12,729)
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	26,743	11,993
Other liabilities	(26,700)	(11,993)
Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	44	73
Other liabilities	(44)	(73)
Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	1
Other liabilities	(266)	(195)
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	8	437
Other liabilities	(50)	(430)
Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	771	263
Other liabilities	0	0
Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	0
Other liabilities	(2)	0
Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	0	4
Other liabilities	$ (133)	$ (38)