Federal Home Loan Bank Advances (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Federal Home Loan Bank Advances [Line Items]
Long-term advances outstanding	$ 115,000,000	$ 115,000,000	[1]
FHLB of Atlanta [Member]
Federal Home Loan Bank Advances [Line Items]
Credit availability under the FHLB	171,060,000	184,400,000
Maximum percentage total assets able to borrow (in hundredths)	20.00%
Short-term borrowings with the FHLB	0	0
Long-term advances outstanding	115,000,000	115,000,000
Maturities of long-term advances [Abstract]
2016 Maturity, Amount	15,000,000
2017 Maturity, Amount	70,000,000
Thereafter Maturity, Amount	30,000,000
Long-term advances Maturity, Amount	115,000,000
Loans pledged as collateral	218,033,000
Repayments of FHLB Advances borrowings	65,000,000
Advances for new borrowings	65,000,000
Prepayment penalties	$ 5,300,000
FHLB Advances, existing borrowings average cost rate (in hundredths)	3.87%
FHLB Advances, new borrowings average cost rate (in hundredths)	2.72%
FHLB of Atlanta [Member] | Minimum [Member]
Interest rate on maturities of long-term advances [Abstract]
2016 Maturity, Rate (in hundredths)	1.81%
2017 Maturity, Rate (in hundredths)	2.43%
Thereafter Maturity, Rate (in hundredths)	2.58%
FHLB of Atlanta [Member] | Maximum [Member]
Interest rate on maturities of long-term advances [Abstract]
2016 Maturity, Rate (in hundredths)	1.83%
2017 Maturity, Rate (in hundredths)	4.05%
Thereafter Maturity, Rate (in hundredths)	4.00%

[1] Restated