MORTGAGE LOANS HELD-FOR-SALE, at FAIR VALUE - Narrative (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Mortgage loans held-for-sale Disclosure [Abstract]
Carrying value	[1]	$ 0	$ 2,849,536

[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, 2017 and December 31, 2016, assets of consolidated VIEs totaled $1,255,404,335 and $1,369,120,941, respectively, and the liabilities of consolidated VIEs totaled $1,228,295,517 and $1,344,404,080, respectively