Investment and Mortgage-Backed Securities, Held to Maturity (Schedule of investment and mortgage-backed securities held to maturity) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Transferred Security, at Carrying Value	$ 72,000,000
Held To Maturity, Amortized Cost	0	76,072,262
Held-to-maturity Securities, Gross Unrealized Gains		3,750,742
Held-to-maturity Securities, Gross Unrealized Losses		151,118
Held-to-maturity Securities, Fair Value	0	79,671,886
Held-to-maturity Securities, Transferred to Available-for-sale Securities, Unrealized Gain (Loss)	1,400,000
FHLB Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost		7,996,378
Held-to-maturity Securities, Gross Unrealized Gains		123,702
Held-to-maturity Securities, Gross Unrealized Losses		21,160
Held-to-maturity Securities, Fair Value		8,098,920
Federal Farm Credit Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost		6,796,255
Held-to-maturity Securities, Gross Unrealized Gains		2,070
Held-to-maturity Securities, Gross Unrealized Losses		23,727
Held-to-maturity Securities, Fair Value		6,774,598
FNMA and FHLMC Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost		4,019,931
Held-to-maturity Securities, Gross Unrealized Gains		29,029
Held-to-maturity Securities, Gross Unrealized Losses		4,560
Held-to-maturity Securities, Fair Value		4,044,400
SBA Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost		5,865,767
Held-to-maturity Securities, Gross Unrealized Gains		315,841
Held-to-maturity Securities, Gross Unrealized Losses		6,139
Held-to-maturity Securities, Fair Value		6,175,469
Mortgage-Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost		51,238,931
Held-to-maturity Securities, Gross Unrealized Gains		3,280,100
Held-to-maturity Securities, Gross Unrealized Losses		95,532
Held-to-maturity Securities, Fair Value		54,423,499
Equity Securities
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity, Amortized Cost		155,000
Held-to-maturity Securities, Gross Unrealized Gains		0
Held-to-maturity Securities, Gross Unrealized Losses		0
Held-to-maturity Securities, Fair Value		$ 155,000