Offsetting Assets and Liabilities (Schedule of Offsetting of Liabilities) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Repurchase agreements
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	$ 156,343,944	$ 138,591,678
Total
Gross Amounts of Recognized Liabilities	450,500,693	374,650,654
Gross Amounts Offset in the Consolidated Balance Sheets	(104,683)
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	450,396,010	374,650,654
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(447,421,795)	(373,290,126)
Cash Collateral Received	(2,974,215)	(1,360,528)
Net Amount
Mortgage Loans [Member]
Repurchase agreements
Gross Amounts of Recognized Liabilities	293,609,481	236,058,976
Gross Amounts Offset in the Consolidated Balance Sheets
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	293,609,481	236,058,976
Gross Amounts Not Offset in the Consolidated Balance Sheet
Financial Instruments	(293,609,481)	(236,058,976)
Cash Collateral Received
Net Amount
Agency and Non-Agency Securities [Member]
Repurchase agreements
Gross Amounts of Recognized Liabilities	156,343,944	138,591,678
Gross Amounts Offset in the Consolidated Balance Sheets
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	156,343,944	138,591,678
Gross Amounts Not Offset in the Consolidated Balance Sheet
Financial Instruments	(153,812,314)	(137,231,150)
Cash Collateral Received	(2,531,630)	(1,360,528)
Net Amount
Interest Rate Swap [Member]
Derivatives
Gross Amounts of Recognized Liabilities	547,268
Gross Amounts Offset in the Consolidated Balance Sheet	(104,683)
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets	442,585
Gross Amounts Not Offset in the Consolidated Balance Sheet
Financial Instruments
Cash Collateral Received	(442,585)
Net Amount