Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Notional Amount of Derivatives	$ 753,432	$ 554,418
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	596,025	435,542
Interest Rate Caps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	10,236	27,736
Credit Risk Participation Agreements [Member]
Derivative [Line Items]
Notional Amount of Derivatives	46,565	43,243
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	$ 100,606	$ 47,897