DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	$ 0	$ 21,550
Derivative Assets, Notional Amount	0	25,000,000
Derivative Liabilities, Fair value	(3,200,519)	(2,289,058)
Derivative Liabilities, Notional Amount	461,000,000	324,000,000
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	0	0
Derivative Assets, Notional Amount	0	0
Derivative Liabilities, Fair value	(2,850,933)	(1,755,107)
Derivative Liabilities, Notional Amount	271,000,000	226,000,000
Swaptions [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value		21,550
Derivative Assets, Notional Amount		25,000,000
Derivative Liabilities, Fair value		0
Derivative Liabilities, Notional Amount		0
Futures [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair value	0	0
Derivative Assets, Notional Amount	0	0
Derivative Liabilities, Fair value	(349,586)	(533,951)
Derivative Liabilities, Notional Amount	$ 190,000,000	$ 98,000,000