Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income	$ 71,525	$ 30,846
Interest expense	(74,717)	(31,308)
Net interest expense	(3,192)	(462)
Realized loss on sales of investments, net	0	(23,315)
Unrealized (loss) gain on investments, net	(70,024)	57,120
Gain (loss) on derivative instruments, net	124,635	(67,267)
Total other gains (losses), net	54,611	(33,462)
Noninterest Expense [Abstract]
Compensation and benefits	(7,177)	(3,750)
Other general and administrative	(3,703)	(3,622)
Other operating expenses	(421)	(426)
Total operating expenses	(11,301)	(7,798)
Net income (loss)	40,118	(41,722)
Preferred stock dividends	(1,923)	(1,923)
Net income (loss) to common shareholders	38,195	(43,645)
Other comprehensive income:
Unrealized (loss) gain on available-for-sale investments, net	(17,268)	14,793
Reclassification of realized (loss) gain on available-for-sale investments, net	0	0
Total other comprehensive (loss) income	(17,268)	14,793
Comprehensive income (loss) to common shareholders	$ 20,927	$ (28,852)
Weighted average common shares-basic (in shares)	59,008,316	53,823,866
Weighted average common shares-diluted (in shares)	59,717,332	53,823,866
Net income (loss) per common share-basic (in dollars per share)	$ 0.65	$ (0.81)
Net income (loss) per common share-diluted (in dollars per share)	$ 0.64	$ (0.81)