Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Interest Income
Interest income	$ 124,291	$ 123,756	$ 152,704
Interest expense	48,373	32,430	27,605
Net Interest Income	75,918	91,326	125,099
Other Income (Loss)
Realized gain (loss) on sale of investments, net	20,598	(21,991)	8,279
Other than temporary impairment	(22,873)	(32,286)	(19,791)
Unrealized gain (loss), net	28,396	(17,107)	(34,011)
Gain (loss) on derivative instruments, net	3,292	(20,735)	(68,895)
Other, net	1,031	180	2,318
Other Income (Loss)	30,444	(91,939)	(112,100)
Expenses
Management fee to affiliate	8,100	10,448	10,874
Other operating expenses	2,419	1,045	2,014
Compensation expense	2,692	3,022	3,762
Professional fees	3,242	4,814	4,368
Other general and administrative expenses	1,325	1,917	1,465
Total general and administrative expenses	7,259	9,753	9,595
Total Expenses	17,778	21,246	22,483
Income (loss) before income taxes	88,584	(21,859)	(9,484)
Income tax provision (benefit)	3,487	3,156	0
Net income (loss)	$ 85,097	$ (25,015)	$ (9,484)
Net income (loss) per common share - basic (in dollars per share)	$ 2.03	$ (0.61)	$ (0.25)
Net income (loss) per common share - diluted (in dollars per share)	$ 2.03	$ (0.61)	$ (0.25)