Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets:
Pledged MBS	$ 5,132,400	$ 3,511,604
Shareholders’ Equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	6,514,130	5,954,594
Preferred stock, shares outstanding	6,514,130	5,954,594
Preferred stock, aggregate liquidation preference	$ 162,853	$ 148,865
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	24,646,964	20,939,072
Common stock, shares outstanding	24,646,964	20,939,072