Investment and Mortgage-Backed Securities, Held to Maturity (Schedule of investment and mortgage-backed securities held to maturity) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	$ 74,196,803	$ 76,072,262
Held-to-maturity Securities, Gross Unrealized Gains	3,357,972	3,750,742
Held-to-maturity Securities, Gross Unrealized Losses	178,373	151,118
Held-to-maturity Securities, Fair Value	77,376,402	79,671,886
FHLB Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	8,996,919	7,996,378
Held-to-maturity Securities, Gross Unrealized Gains	81,331	123,702
Held-to-maturity Securities, Gross Unrealized Losses	32,920	21,160
Held-to-maturity Securities, Fair Value	9,045,330	8,098,920
Federal Farm Credit Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	5,775,661	6,796,255
Held-to-maturity Securities, Gross Unrealized Gains	0	2,070
Held-to-maturity Securities, Gross Unrealized Losses	8,963	23,727
Held-to-maturity Securities, Fair Value	5,766,698	6,774,598
FNMA and FHLMC Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	3,017,594	4,019,931
Held-to-maturity Securities, Gross Unrealized Gains	20,326	29,029
Held-to-maturity Securities, Gross Unrealized Losses	3,770	4,560
Held-to-maturity Securities, Fair Value	3,034,150	4,044,400
SBA Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	5,566,499	5,865,767
Held-to-maturity Securities, Gross Unrealized Gains	292,341	315,841
Held-to-maturity Securities, Gross Unrealized Losses	3,161	6,139
Held-to-maturity Securities, Fair Value	5,855,679	6,175,469
Mortgage-Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	50,685,130	51,238,931
Held-to-maturity Securities, Gross Unrealized Gains	2,963,974	3,280,100
Held-to-maturity Securities, Gross Unrealized Losses	129,559	95,532
Held-to-maturity Securities, Fair Value	53,519,545	54,423,499
Equity Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost	155,000	155,000
Held-to-maturity Securities, Gross Unrealized Gains	0	0
Held-to-maturity Securities, Gross Unrealized Losses	0	0
Held-to-maturity Securities, Fair Value	$ 155,000	$ 155,000