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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Losses	$ 0	$ 176,000	$ 47,000	$ 607,000
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less Than One Year, Amortized Cost	693,127		693,127
One – Five Years, Amortized Cost	13,170,421		13,170,421
Five – Ten Years, Amortized Cost	63,800,934		63,800,934
After Ten Years, Amortized Cost	121,654,457		121,654,457
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	381,228,581		381,228,581
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less Than One Year, Fair Value	692,225		692,225
One – Five Years, Fair Value	13,414,588		13,414,588
Five – Ten Years, Fair Value	64,895,557		64,895,557
After Ten Years, Fair Value	123,011,834		123,011,834
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 388,352,231		$ 388,352,231