DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES (Details) - USD ($)	Dec. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	$ 60,839,661	$ 35,583,970
Derivative Assets, Notional Amount	25,000,000	117,000,000
Derivative Liabilities, Fair value	(2,289,058)	(1,231,667)
Derivative Liabilities, Notional Amount	324,000,000	281,000,000
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	0	237,989
Derivative Assets, Notional Amount	0	57,000,000
Derivative Liabilities, Fair value	(1,755,107)	(1,231,667)
Derivative Liabilities, Notional Amount	226,000,000	281,000,000
Swaptions [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	21,550	1,770,795
Derivative Assets, Notional Amount	25,000,000	25,000,000
Derivative Liabilities, Fair value	0	0
Derivative Liabilities, Notional Amount	0	0
Linked transactions [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	60,818,111	33,352,562
Derivative Assets, Notional Amount	0	0
Derivative Liabilities, Fair value	0	0
Derivative Liabilities, Notional Amount	0	0
Futures [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	0	154,265
Derivative Assets, Notional Amount	0	10,000,000
Derivative Liabilities, Fair value	(533,951)	0
Derivative Liabilities, Notional Amount	$ 98,000,000	0
TBAs [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value		68,359
Derivative Assets, Notional Amount		25,000,000
Derivative Liabilities, Fair value		0
Derivative Liabilities, Notional Amount		$ 0