Derivative Financial Instruments Part 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended
	Mar. 31, 2012 Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Mar. 31, 2011 Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Mar. 31, 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]	Mar. 31, 2012 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Mar. 31, 2011 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Mar. 31, 2012 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Mar. 31, 2011 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Mar. 31, 2012 Not Designated as Hedging Instrument [Member] Future [Member] Other Assets [Member]	Dec. 31, 2011 Not Designated as Hedging Instrument [Member] Future [Member] Other Assets [Member]	Mar. 31, 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]	Mar. 31, 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]	Mar. 31, 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]	Mar. 31, 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]	Mar. 31, 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									$ (970)	$ 986	$ 1,613	$ 1,689			$ 359	$ 144	$ 502	$ 702
Fair value of derivative liability			(176)	2,217									1,657	1,769					361	694
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	$ 2,393	$ (3,253)			$ (1,467)	$ (382)	$ 35	$ 0