RESIDENTIAL 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 [Abstract]
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
Residential Mortgage [Member]
ASSETS
Multi-family mortgage loans held in securitization trusts		631,446,984
Receivables		2,030,045
Total assets		633,447,029
Liabilities and Equity [Abstract]
Multi-family securitized debt obligations	[2]	502,900,040
Payables		1,662,660
Liabilities, Total		504,562,700
Equity		128,914,329
Total liabilities and equity		$ 633,477,029

[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.

[2] Includes $70,864,063 of residential securitized debt obligations sold but not settled as of December 31, 2014.