Derivative Financial Instruments Part 2 (Details) (USD $) In Thousands			3 Months Ended		6 Months Ended														3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2011 Designated as Hedging Instrument [Member] Forward Contracts [Member] Other Liabilities [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Forward Contracts [Member] Other Liabilities [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2010 Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2010 Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Future [Member] Other Assets [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Future [Member] Other Assets [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Assets [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Assets [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Liabilities [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Liabilities [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Exchange Traded Purchased Options [Member] Other Assets [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Exchange Traded Purchased Options [Member] Other Assets [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] OTC Written Options [Member] Other Assets [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] OTC Written Options [Member] Other Assets [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Exchange Traded Written Options [Member] Other Liabilities [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Exchange Traded Written Options [Member] Other Liabilities [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2010 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Jun. 30, 2010 Not Designated as Hedging Instrument [Member] Mortgage Banking, Net [Member]	Mar. 31, 2011 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Jun. 30, 2010 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]	Jun. 30, 2010 Not Designated as Hedging Instrument [Member] Bankcard and Other Fees [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative asset							$ 388	$ (2,897)	$ 353	$ 0			$ 196	$ 313	$ (156)	$ 337
Fair value of derivative liability	131	(3,143)									368	0					1,389	1,562
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized			$ (22)	$ (3,612)	$ (3,275)	$ (5,457)													$ 6,535	$ 13,452	$ 6,154	$ 17,792	$ 76	$ 0	$ 166	$ 0