Commitments And Contingencies (Outstanding Commitments) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Outstanding commitments	$ 1,607,386	$ 1,483,109
Commitments To Extend Credit [Member]
Outstanding commitments	1,473,961	1,360,266
Standby Letters Of Credit [Member]
Outstanding commitments	53,894	59,876
Other Letters Of Credit [Member]
Outstanding commitments	79,531	62,722
Bill Of Lading Guarantees [Member]
Outstanding commitments		$ 245

- Definition

Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.

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