Investment and Mortgage-Backed Securities, Available for Sale (Schedule of Held to Maturity Securities, Contractual Maturities) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Gross Realized Losses	$ 0	$ 207,000	$ 47,000	$ 432,000
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less Than One Year, Amortized Cost	756,293		756,293
One – Five Years, Amortized Cost	12,998,123		12,998,123
Five – Ten Years, Amortized Cost	63,923,630		63,923,630
After Ten Years, Amortized Cost	123,467,525		123,467,525
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	391,109,584		391,109,584
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less Than One Year, Fair Value	759,158		759,158
One – Five Years, Fair Value	13,295,430		13,295,430
Five – Ten Years, Fair Value	64,618,639		64,618,639
After Ten Years, Fair Value	123,171,798		123,171,798
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 395,663,451		$ 395,663,451