Consolidated K-Series - Condensed Balance Sheet of Consolidated K-Series (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Assets
Multi-family loans held in securitization trusts, at fair value		$ 7,105,336	$ 8,365,514
Total Assets	[1]	9,059,564	10,540,005
Liabilities and Equity
Total Liabilities	[1]	8,179,038	9,722,078
Equity		880,526	817,927
Total Liabilities and Stockholders' Equity		9,059,564	10,540,005
Consolidated K-Series
Assets
Multi-family loans held in securitization trusts, at fair value		7,105,336	8,365,514
Receivables		24,579	29,809
Total Assets		7,129,915	8,395,323
Liabilities and Equity
Multi-family CDOs		6,818,901	8,048,053
Accrued expenses		24,483	29,354
Total Liabilities		6,843,384	8,077,407
Equity		286,531	317,916
Total Liabilities and Stockholders' Equity		$ 7,129,915	$ 8,395,323

[1] Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs") as the Company is the primary beneficiary of these VIEs. As of December 31, 2015 and December 31, 2014, assets of consolidated VIEs totaled $7,413,082 and $8,847,078, respectively, and the liabilities of consolidated VIEs totaled $7,078,162 and $8,457,034, respectively. See Note 7 for further discussion.