Derivative Financial Instruments Part 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012 Designated as Hedging Instrument [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member]	Sep. 30, 2012 Designated as Hedging Instrument [Member]	Sep. 30, 2011 Designated as Hedging Instrument [Member]	Sep. 30, 2012 Designated as Hedging Instrument [Member] Forward Contracts [Member] Other Liabilities [Member]	Dec. 31, 2011 Designated as Hedging Instrument [Member] Forward Contracts [Member] Other Liabilities [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Sep. 30, 2011 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Future Contracts [Member] Other Assets [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Future Contracts [Member] Other Assets [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Credit Risk Participation Agreement [Member] Other Assets [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Credit Risk Participation Agreement [Member] Other Assets [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Assets [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Assets [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Liabilities [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Liabilities [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Exchange Traded Purchased Options [Member] Other Assets [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Exchange Traded Purchased Options [Member] Other Assets [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] OTC Written Options [Member] Other Assets [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] OTC Written Options [Member] Other Assets [Member]	Sep. 30, 2012 Not Designated as Hedging Instrument [Member] Exchange Traded Written Options [Member] Other Liabilities [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Exchange Traded Written Options [Member] Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset															$ 740	$ 986	$ 24	$ 0	$ 5,114	$ 1,689			$ 89	$ 144	$ 4,305	$ 702
Fair value of derivative liability					7,496	2,217															5,368	1,769					315	694
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	$ (4,212)	$ (3,570)	$ (5,279)	$ (6,845)			$ 2,883	$ 12,092	$ 9,913	$ 18,246	$ (85)	$ (23)	$ (246)	$ (38)