Carrying Amounts and Fair Value of Financial Instruments (Significant unobservable inputs used in the fair value measurements) (Details) (Fair Value, Measurements, Nonrecurring, USD $)	3 Months Ended
	Mar. 31, 2013		Dec. 31, 2012
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 46,184,744		$ 51,031,723
Impaired Loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	37,430,635	[1]	39,506,538	[2]
Fair Value Measurements, Valuation Techniques	Appraised Value
Significant Unobservable Inputs	Discount Rates/ Discounts to Appraised Values
Foreclosed Assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	6,491,907		6,754,425
Fair Value Measurements, Valuation Techniques	Appraised Value/Comparable Sales
Significant Unobservable Inputs	Discount Rates/ Discounts to Appraised Values
Minimum | Impaired Loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Significant Unobservable Inputs, Percentage Range	0.00%
Minimum | Foreclosed Assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Significant Unobservable Inputs, Percentage Range	0.00%
Maximum | Impaired Loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Significant Unobservable Inputs, Percentage Range	70.00%
Maximum | Foreclosed Assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Significant Unobservable Inputs, Percentage Range	66.00%
Fair Value, Inputs, Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	43,922,542		46,260,963
Fair Value, Inputs, Level 3 | Impaired Loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	37,430,635	[1]	39,506,538	[2]
Fair Value, Inputs, Level 3 | Foreclosed Assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 6,491,907		$ 6,754,425

[1] IMPAIRED LOANS ARE REPORTED NET OF SPECIFIC RESERVES OF $563,075

[2] IMPAIRED LOANS ARE REPORTED NET OF SPECIFIC RESERVES OF $440,000