Investment and Mortgage-Backed Securities, Available for Sale (Schedule of Held to Maturity Securities, Contractual Maturities) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Losses	$ 224,000	$ 0
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less Than One Year, Amortized Cost	0
One – Five Years, Amortized Cost	10,555,457
Five – Ten Years, Amortized Cost	74,843,233
After Ten Years, Amortized Cost	92,955,571
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	432,951,620
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less Than One Year, Fair Value	0
One – Five Years, Fair Value	10,775,763
Five – Ten Years, Fair Value	75,378,283
After Ten Years, Fair Value	92,245,540
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 436,445,047