Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Assets
RMBS, pledged assets available-for-sale		$ 1,698,688	$ 1,728,564
Investments in Servicing Related pledged assets at fair value	[1]	$ 294,907	$ 122,806
Stockholders' Equity
Common stock, par value (in dollars per shares)		$ 0.01	$ 0.01
Common stock, shares authorized (in shares)		500,000,000	500,000,000
Common stock, shares issued (in shares)		16,652,170	12,721,464
Common stock, shares outstanding (in shares)		16,652,170	12,721,464
Series A Preferred Stock [Member]
Stockholders' Equity
Preferred stock, par value (in dollars per shares)		$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)		100,000,000	100,000,000
Preferred stock, shares issued (in shares)		2,718,206	2,400,000
Preferred stock, shares outstanding (in shares)		2,718,206	2,400,000
Preferred stock, liquidation preference		$ 67,955	$ 60,000

[1] Carrying value represents the fair value of the pools (see Note 9).