Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest income	$ 17,427	$ 13,892
Interest expense	(1,748)	(1,633)
Net interest income	15,679	12,259
Realized gain on sale of investments, net	0	4,697
Unrealized loss on investments, net	(111,251)	(980)
Gain on derivative instruments, net	(220,211)	(107,801)
Other operating expense, net	(321)	(380)
General and administrative expenses:
Compensation and benefits	(3,466)	(3,096)
Other general and administrative	(3,643)	(2,372)
Net income	117,209	117,929
Preferred stock dividends	(1,923)	(2,559)
Preferred stock redemption charge	0	(2,987)
Net income to common shareholders	115,286	112,383
Other comprehensive income:
Unrealized loss on available-for-sale investments, net	(91,340)	(60,459)
Reclassification adjustment for realized gain on available-for-sale investments, net	0	(4,697)
Total other comprehensive loss	(91,340)	(65,156)
Comprehensive income to common shareholders	$ 23,946	$ 47,227
Weighted average common shares-basic (in shares)	36,725,365	26,788,693
Weighted average common shares-diluted (in shares)	37,111,733	26,788,693
Net income (loss) per common share-basic (in dollars per share)	$ 3.14	$ 4.20
Net income (loss) per common share-diluted (in dollars per share)	3.11	4.20
Common Stock, Dividends, Per Share, Declared	$ 0.39	$ 0.39