Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Other assets	$ 16,369	$ 10,457
Other liabilities	(16,251)	(10,948)
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	15,681	10,144
Other liabilities	(15,681)	(10,166)
Not Designated as Hedging Instrument [Member] | Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	16	62
Other liabilities	(16)	(62)
Not Designated as Hedging Instrument [Member] | Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	2	3
Other liabilities	(234)	(226)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	219	248
Other liabilities	(197)	(494)
Not Designated as Hedging Instrument [Member] | Mortgage Loan Commitments [Member]
Derivatives, Fair Value [Line Items]
Other assets	451	0
Other liabilities	0	0
Not Designated as Hedging Instrument [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	0	0
Other liabilities	(5)	0
Not Designated as Hedging Instrument [Member] | Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	0	0
Other liabilities	$ (118)	$ 0