AVAILABLE-FOR-SALE SECURITIES (Details 4) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Designated credit reserve, Acquisitions	$ (11,810,437)	$ (5,363,444)
Designated credit reserve, Accretion of net discount	0	0
Designated credit reserve, Realized credit losses	755,162	480,862
Designated credit reserve, Ending balance	(11,055,275)	(4,882,582)
Unamortized net discount, Acquisitions	(12,009,982)	(3,997,817)
Unamortized net discount, Accretion of net discount	741,543	463,478
Unamortized net discount, Realized credit losses	0	0
Unamortized net discount, Ending balance	(11,268,439)	(3,534,339)
Acquisitions, Total	(23,820,419)	(9,361,261)
Accretion of net discount, Total	741,543	463,478
Realized credit losses, Total	755,162	480,862
Ending balance,Total	$ (22,323,714)	$ (8,416,921)