MULTI-FAMILY MORTGAGE LOAN SECURITIZATION TRUSTS (Details) - USD ($)		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May. 15, 2012
Assets
Multi-family mortgage loans held in securitization trusts		$ 1,750,294,430	$ 0
Total assets	[1]	2,922,209,557	528,201,405
Liabilities and Equity
Multi-family securitized debt obligations		1,670,573,456	0
Liabilities, Total	[1]	2,709,411,427	414,276,043
Equity		212,798,130	113,925,362	$ 32,268,720	$ 0
Total liabilities and equity		2,922,209,557	$ 528,201,405
Multi-Family Mortgage Loans Held in Securitization Trusts [Member]
Assets
Multi-family mortgage loans held in securitization trusts		1,750,294,430
Receivables		6,012,642
Total assets		1,756,307,072
Liabilities and Equity
Multi-family securitized debt obligations		1,670,573,456
Payables		5,800,065
Liabilities, Total		1,676,373,521
Equity		79,933,551
Total liabilities and equity		$ 1,756,307,072

[1] Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities (“VIEs”) as the Company is primary beneficiary of these VIEs. As of December 31, 2014 and December 31, 2013, assets of consolidated VIEs totaled $2,389,754,101 and $0, respectively, and the liabilities of consolidated VIEs totaled $2,180,936,221 and $0, respectively.