Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income	$ 19,853,000	$ 43,748,000	$ 59,676,000	$ 83,706,000
Interest expense	4,850,000	30,813,000	26,952,000	57,089,000
Net interest income	15,003,000	12,935,000	32,724,000	26,617,000
Loss on derivative instruments, net	8,563,000	117,535,000	204,130,000	179,233,000
Gain (loss) on sale of investments, net	193,099,000	(10,360,000)	277,882,000	(10,360,000)
Fair value adjustments, net	332,000	(16,000)	(40,000)	(29,000)
Other operating (expense) income, net	(222,000)	256,000	(645,000)	25,000
General and administrative expenses:
Compensation and benefits	(2,736,000)	(1,747,000)	(4,898,000)	(3,645,000)
Other general and administrative	(2,075,000)	(2,518,000)	(4,534,000)	(4,574,000)
Net income (loss)	194,838,000	(118,985,000)	96,359,000	(171,199,000)
Preferred stock dividends	(3,253,000)	(3,206,000)	(7,094,000)	(6,265,000)
Net income (loss) to common shareholders	191,585,000	(122,191,000)	85,351,000	(177,464,000)
Other comprehensive income:
Unrealized gain on available-for-sale investments, net	28,052,000	100,767,000	185,807,000	187,399,000
Reclassification adjustment for (gain) loss on sale of investments, net	(193,099,000)	10,360,000	(277,882,000)	10,360,000
Reclassification adjustment for de-designated cash flow hedges	0	0	0	(165,000)
Total other comprehensive (loss) income	(165,047,000)	111,127,000	(92,075,000)	197,594,000
Comprehensive income (loss) to common shareholders	$ 26,538,000	$ (11,064,000)	$ (6,724,000)	$ 20,130,000
Net income (loss) per common share-basic and diluted	$ 8.31	$ (4.98)	$ 3.71	$ (7.49)
Weighted average common shares-basic and diluted	23,057	24,541	23,010	23,681
Preferred Stock Redemption Premium	$ 0	$ 0	$ 3,914,000	$ 0
Accumulated Deficit
General and administrative expenses:
Net income (loss)		$ (118,985,000)