Derivative Financial Instruments (Changes in the Fair value of Non-hedge Derivatives as a Component of Other Non-Interest Income) (Details) (Other Expense [Member], Not Designated as Hedging Instrument [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Net impact on other non-interest income	$ 5,332,000	$ 5,620,000	$ 921,000
Visa Swap [Member]
Derivative [Line Items]
Net impact on other non-interest income	(120,000)	(556,000)	(153,000)
Commercial loan interest rate derivatives, net [Member]
Derivative [Line Items]
Net impact on other non-interest income	5,890,000	6,128,000	2,889,000
Fed funds futures contracts [Member]
Derivative [Line Items]
Net impact on other non-interest income	$ (438,000)	$ 48,000	$ (1,815,000)