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Junior Subordinated Debentures (Details Textual) (USD $)			12 Months Ended		1 Months Ended		12 Months Ended				12 Months Ended			1 Months Ended	12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 BFC II [Member]	Dec. 31, 2011 BFC II [Member]	Mar. 31, 2004 BFC II [Member] Cumulative Trust Preferred Securities [Member]	Feb. 29, 2004 BFC II [Member] Cumulative Trust Preferred Securities [Member]	Dec. 31, 2012 BFC II [Member] Cumulative Trust Preferred Securities [Member]	Dec. 31, 2012 BFC II [Member] Junior Subordinated Debentures [Member]	Dec. 31, 2012 UNST I [Member]	Dec. 31, 2011 UNST I [Member]	Dec. 31, 2012 UNST I [Member] Junior Subordinated Debentures [Member]	Mar. 31, 2011 UNST I [Member] Junior Subordinated Debentures [Member]	Oct. 31, 2010 UNST I [Member] Junior Subordinated Debentures [Member]	Oct. 31, 2010 UNST I [Member] Junior Subordinated Deferrable Interest Debentures [Member]	Dec. 31, 2012 FBCST I [Member]	Dec. 31, 2011 FBCST I [Member]	Dec. 31, 2012 FBCST I [Member] Junior Subordinated Debentures [Member]	Jul. 12, 2011 FBCST I [Member] Junior Subordinated Debentures [Member]	Jul. 12, 2011 FBCST I [Member] Junior Subordinated Deferrable Interest Debentures [Member]
Junior subordinated debentures (Textual) [Abstract]
Issue of securities					$ 1,000,000	$ 25,000,000
Cumulative trust preferred securities interest rate							7.20%
Issuance of deferrable interest debentures														2,000,000
Interest rate of securities								7.20%				6.50%
Interest rate terms											3 month LIBOR						3 month LIBOR
Spread on LIBOR											1.65%						2.85%
Debt instrument maturity date			Mar. 31, 2034					Mar. 31, 2034	Mar. 15, 2036						Dec. 17, 2033
Frequency of payment								Payable January 15, April 15, July 15 and October 15 of each year			Payable March 15, June 15, September 15 and December 15 of each year						Payable March 17, June 17, September 17 and December 17 of each year
Junior Subordinated Notes Assumed	$ 26,804,000	$ 36,083,000	$ 26,804,000	$ 26,804,000				$ 26,800,000		$ 2,062,000			$ 2,100,000			$ 7,217,000		$ 7,200,000	$ 7,000,000
Interest rate terms									3 month LIBOR + 1.65%						3 month LIBOR + 2.85%

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Cumulative trust preferred securities interest rate.

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Issuance of deferrable interest debentures.

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The percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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Interest rate stated in the contractual debt agreement.

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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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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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