Derivative Instruments (Impact Of Derivatives On Balance Sheet) (Details) (Not Designated As Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Other Assets [Member]
Derivative [Line Items]
Fair value of derivative assets	$ 31,322	$ 40,004
Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of derivative assets	30,184	38,482
Other Assets [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Fair value of derivative assets	1,138	1,522
Other Assets [Member] | Visa Derivative[Member]
Derivative [Line Items]
Fair value of derivative assets	0	0
Other Liabilities [Member]
Derivative [Line Items]
Fair value of derivative liabilities	35,030	42,142
Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of derivative liabilities	30,689	39,436
Other Liabilities [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Fair value of derivative liabilities	320	0
Other Liabilities [Member] | Visa Derivative[Member]
Derivative [Line Items]
Fair value of derivative liabilities	$ 4,021	$ 2,706