Derivative Instruments (Schedule Of Fair Values Of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 12,682	$ 16,740
Total liability derivatives	(13,249)	(17,718)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other assets	0	0
Other liabilities	(492)	(723)
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	0	0
Other liabilities	(492)	(723)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other assets	12,682	16,740
Other liabilities	(12,757)	(16,995)
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Other assets	11,767	16,334
Other liabilities	(11,769)	(16,337)
Not Designated as Hedging Instrument [Member] | Interest Rate Caps [Member]
Derivatives, Fair Value [Line Items]
Other assets	1	1
Other liabilities	(1)	(1)
Not Designated as Hedging Instrument [Member] | Credit Risk Participation Agreements [Member]
Derivatives, Fair Value [Line Items]
Other assets	5	9
Other liabilities	(98)	(196)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Other assets	909	396
Other liabilities	$ (889)	$ (461)