Subordinated Debt Securities (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Debt Instrument, Description of Variable Rate Basis	Prime rate or LIBOR plus 2.5 Percentage
Debt Instrument, Basis Spread on Variable Rate	2.50%
Trust 1 [Member]
Proceeds from Issuance of Trust Preferred Securities	30.0
Proceeds from Issuance of Common Stock	0.9
Trust 2 [Member]
Proceeds from Issuance of Trust Preferred Securities	25.0
Proceeds from Issuance of Common Stock	0.8
Subordinated Debt Due In 2035 [Member]
Long-term Debt, Gross	30.9
Subordinated Debt Due In 2035 [Member] \| Trust 1 [Member]
Long-term Debt, Gross	30.9
Subordinated Borrowing, Interest Rate	7.725%
Debt Instrument, Description of Variable Rate Basis	LIBOR rate plus 3.25 percentage
Debt Instrument, Basis Spread on Variable Rate	3.25%
Subordinated Debt Due In 2037 [Member]
Long-term Debt, Gross	25.8
Subordinated Debt Due In 2037 [Member] \| Trust 2 [Member]
Long-term Debt, Gross	25.8
Subordinated Borrowing, Interest Rate	8.28%
Debt Instrument, Description of Variable Rate Basis	LIBOR rate plus 2.90 percentage
Debt Instrument, Basis Spread on Variable Rate	2.90%

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The cash inflow from the additional capital contribution to the entity.

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- Definition

The cash inflow from issuance of preferred stocks by a business trust or other special purpose entity, mainly established by a bank holding entity, to third party investors. The trust's assets are deeply subordinated debentures of the bank holding entity. Most trust preferred securities are subject to a mandatory redemption upon the repayment of the debentures.

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