Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest income	$ 22,419	$ 25,089
Interest expense	7,519	6,310
Net interest income	14,900	18,779
Gain (loss) on derivative instruments, net	175	(48,264)
Loss on sale of investments, net	(1,708)	(3,941)
Fair value adjustments, net	10	24
Other (expense) income, net	(46)	63
General and administrative expenses:
Compensation and benefits	(2,245)	(2,219)
Other general and administrative	(2,035)	(1,873)
Net income (loss)	9,051	(37,431)
Preferred stock dividends	(2,435)	(2,294)
Net income (loss) to common shareholders	6,616	(39,725)
Other comprehensive income:
Unrealized gain on available-for-sale investments, net	18,368	37,760
Reclassification adjustment for loss on sale of investments, net	1,708	3,941
Reclassification adjustment for de-designated cash flow hedges	(99)	27
Total other comprehensive income	19,977	41,728
Comprehensive income to common shareholders	$ 26,593	$ 2,003
Net income (loss) per common share-basic and diluted	$ 0.13	$ (0.81)
Weighted average common shares-basic and diluted	49,176	49,041