DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES (Details Textual) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Accrued interest receivable	[1]	$ 7,619,717				$ 8,650,986				$ 7,619,717	$ 8,650,986
Accrued interest payable	[1]	5,467,916				6,574,699				5,467,916	6,574,699
Interest Income (Expense), Net		5,903	$ 6,153	$ 5,772	$ 5,760	6,537	$ 7,100	$ 8,570	$ 9,103	23,588,344	31,309,716	$ 17,971,303
Interest Expense		16,259	16,580	17,837	18,857	19,801	20,301	21,062	21,940	1,860,000
Investment Income, Interest		22,162	$ 22,733	$ 23,610	$ 24,617	26,338	$ 27,401	$ 29,632	$ 31,043	16,724,278	11,087,306	11,854,700
Available-for-sale Securities	[1]	870,929,601				571,466,581				870,929,601	571,466,581
Secured Debt, Repurchase Agreements		804,811,000				$ 568,432,457				804,811,000	568,432,457
Accounting Standards Update 2014-11 [Member]
Derivative [Line Items]
Accrued interest receivable		200,000								200,000
Accrued interest payable		300,000								300,000
Available-for-sale Securities		210,238,657								210,238,657
Secured Debt, Repurchase Agreements		$ 149,293,000								$ 149,293,000
Swap [Member]
Derivative [Line Items]
Interest Income (Expense), Net											2,216,417	3,495,232
Interest Expense											2,719,563	3,329,219
Investment Income, Interest											$ 503,146	166,013
Linked Tansactions [Member]
Derivative [Line Items]
Accrued interest receivable												163,970
Accrued interest payable												$ 291,518

[1] Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities (“VIE's) as the Company is the primary beneficiary of these VIEs. As of December 31, 2016 and December 31, 2015, assets of consolidated VIEs totaled $1,369,120,941 and $1,868,482,556, respectively, and the liabilities of consolidated VIEs totaled $1,344,404,080 and $1,750,916,265, respectively