Non-marketable Equity Securities - Schedule of Cost Method Invesments (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule of Cost-method Investments [Line Items]
Cost method investments, original cost	$ 6,707,926	$ 9,273,000
Cost-method investments, cummulative OTTI charge	1,914	502,000
Cost method investments	6,706,012	8,771,000
Federal Home Loan Bank of Atlanta
Schedule of Cost-method Investments [Line Items]
Cost method investments, original cost	4,154,300	6,130,000
Cost-method investments, cummulative OTTI charge	0	0
Cost method investments	4,154,300	6,130,000
Yadkin Valley Statutory Trust I
Schedule of Cost-method Investments [Line Items]
Cost method investments, original cost	774,000	774,000
Cost-method investments, cummulative OTTI charge	0	0
Cost method investments	774,000	774,000
American Community Capital Trust II
Schedule of Cost-method Investments [Line Items]
Cost method investments, original cost	310,000	310,000
Cost-method investments, cummulative OTTI charge	0	0
Cost method investments	310,000	310,000
Limited Partnerships
Schedule of Cost-method Investments [Line Items]
Cost method investments, original cost	1,330,846	1,420,000
Cost-method investments, cummulative OTTI charge	0	0
Cost method investments	1,330,846	1,420,000
Other Investments
Schedule of Cost-method Investments [Line Items]
Cost method investments, original cost	138,780	639,000
Cost-method investments, cummulative OTTI charge	1,914	502,000
Cost method investments	$ 136,866	$ 137,000