Subordinated Debentures	9 Months Ended
Subordinated Debentures	Sep. 30, 2012
Subordinated Debentures [Abstract]
Subordinated Debentures	Note 14. Subordinated Debentures During 2003, the Corporation formed a statutory business trust, which exists for the exclusive purpose of (i) issuing Trust Securities representing undivided beneficial interests in the assets of the Trust; (ii) investing the gross proceeds of the Trust securities in junior subordinated deferrable interest debentures (subordinated debentures) of the Corporation; and (iii) engaging in only those activities necessary or incidental thereto. These subordinated debentures and the related income effects are not eliminated in the consolidated financial statements as the statutory business trust is not consolidated in accordance with FASB ASC 810-10. Distributions on the subordinated debentures owned by the subsidiary trusts below have been classified as interest expense in the Consolidated Statements of Income. The characteristics of the business trusts and capital securities have not changed with the deconsolidation of the trusts. The capital securities provide an attractive source of funds since they constitute Tier 1 capital for regulatory purposes and have the same tax advantages as debt for Federal income tax purposes. The subordinated debentures are redeemable in whole or part prior to maturity on January 23, 2034. The floating interest rate on the subordinated debentures is three-month LIBOR plus 2.85 percent and resets quarterly. The rate at September 30, 2012 was 3.30 percent.

The entire disclosure for borrowings under subordinated debt agreements that qualify as available in computing net capital under SEC's uniform net capital rule, including restrictive covenants, collateral, interest rates and due dates, amounts due by date and amount owed in total.

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