Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional Amount of Derivatives	$ 1,046,204	$ 797,030
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	874,809	647,709
Interest Rate Caps [Member]
Derivative [Line Items]
Notional Amount of Derivatives	49,914	53,587
Credit Risk Participation Agreements [Member]
Derivative [Line Items]
Notional Amount of Derivatives	75,484	75,943
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	13,047	19,791
Mortgage Loan Commitments [Member]
Derivative [Line Items]
Notional Amount of Derivatives	13,683	0
Mortgage Loan Forward Sale Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	6,267	0
Forward TBA Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	$ 13,000	$ 0