Derivative And Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011		Dec. 31, 2010
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Interest rate-related agreements (1), fair value	$ 54,789	[1]	$ 54,154	[1]
Other assets [Member] | Interest rate-related instruments - customer and mirror [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	1,372,965		1,268,502
Interest rate-related agreements (1), fair value	54,789		54,154
Receive Rate	1.68%		1.78%
Pay Rate	1.68%		1.78%
Maturity	43 months		41 months
Other assets [Member] | Interest rate lock commitments (mortgage) [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	151,497
Interest rate-related agreements (1), fair value	1,308
Other assets [Member] | Forward commitments (mortgage) [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount			281,000
Interest rate-related agreements (1), fair value			5,617
Other assets [Member] | Foreign currency exchange forwards [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	44,100		56,584
Interest rate-related agreements (1), fair value	2,100		1,530
Interest rate-related instruments - customer and mirror [Member] | Other liabilities [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	1,372,965		1,268,502
Interest rate-related agreements (1), fair value	(62,935)		(58,632)
Receive Rate	1.68%		1.78%
Pay Rate	1.68%		1.78%
Maturity	43 months		41 months
Interest rate lock commitments (mortgage) [Member] | Other liabilities [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount			129,377
Interest rate-related agreements (1), fair value			(78)
Forward commitments (mortgage) [Member] | Other liabilities [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	203,089
Interest rate-related agreements (1), fair value	(166)
Foreign currency exchange forwards [Member] | Other liabilities [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	35,161		48,652
Interest rate-related agreements (1), fair value	$ (1,871)		$ (1,289)

[1] At both June 30, 2011 and December 31, 2010, the notional amount of cash flow hedge interest rate swap agreements was $200 million.See Note 11 for information on the fair value of derivative financial instruments.