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Guarantees, Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Guarantees, Commitments And Contingencies [Abstract]
Letters of credit, accrued liability	$ 12.0
Reserve for unfunded lending commitments	7.9
Deferred commitment fees	4.1
Guarantee of trust preferred securities issued by affiliated trusts	300
Range of possible loss, minimum	0
Range of possible loss, maximum	$ 90

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.