Investment and Mortgage-Backed Securities, Available for Sale (Schedule of Held to Maturity Securities, Contractual Maturities) (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Losses	$ 101,000	$ 0	$ 101,000	$ 0
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less Than One Year, Amortized Cost	303,707		303,707
One – Five Years, Amortized Cost	14,618,573		14,618,573
Five – Ten Years, Amortized Cost	72,154,975		72,154,975
After Ten Years, Amortized Cost	96,518,751		96,518,751
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	425,477,772		425,477,772
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less Than One Year, Fair Value	306,647		306,647
One – Five Years, Fair Value	14,974,880		14,974,880
Five – Ten Years, Fair Value	72,232,540		72,232,540
After Ten Years, Fair Value	94,111,780		94,111,780
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 426,846,798		$ 426,846,798

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing after the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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