Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income	$ 30,846	$ 17,427
Interest expense	(31,308)	(1,748)
Net interest (expense) income	(462)	15,679
Realized loss on sales of investments, net	(23,315)	0
Unrealized gain (loss) on investments, net	57,120	(111,251)
(Loss) gain on derivative instruments, net	(67,267)	220,211
Total other (losses) gains, net	(33,462)	108,960
Noninterest Expense [Abstract]
Compensation and benefits	(3,750)	(3,466)
Other general and administrative	(3,622)	(3,643)
Other operating expenses	(426)	(321)
Total operating expenses	(7,798)	(7,430)
Net (loss) income	(41,722)	117,209
Preferred stock dividends	(1,923)	(1,923)
Net (loss) income to common stockholders	(43,645)	115,286
Other comprehensive income:
Unrealized gain (loss) on available-for-sale investments, net	14,793	(91,340)
Total other comprehensive gain (loss)	14,793	(91,340)
Comprehensive (loss) income to common shareholders	$ (28,852)	$ 23,946
Weighted average common shares-basic (in shares)	53,823,866	36,725,365
Weighted average common shares-diluted (in shares)	53,823,866	37,111,733
Net income (loss) per common share-basic (in dollars per share)	$ (0.81)	$ 3.14
Net income (loss) per common share-diluted (in dollars per share)	(0.81)	3.11
Common Stock, Dividends, Per Share, Declared	$ 0.39	$ 0.39