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Off-Balance Sheet Credit Risk (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Fair value of securities accepted as collateral permitted to sell or repledge	$ 1,000.0	$ 864.7
Fair value of collateral securities sold or repledged		109.6
Letters of credit outstanding	9.2	9.2
Loan Origination Commitments [Member]
Outstanding commitments to originate loans	141.0	107.2
Unused lines of Credit [Member]
Unused lines of credit to commercial and consumer borrowers	$ 102.4	$ 97.4

- Definition

Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it is permitted by contract or custom to sell or re-pledge to counterparties as collateral.

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- Definition

Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it has sold or re-pledged to counterparties as collateral.

+ References+ Details