Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest income	$ 42,212	$ 18,335	$ 73,058	$ 35,762
Interest expense	(45,142)	(4,262)	(76,450)	(6,010)
Net interest (expense) income	(2,930)	14,073	(3,392)	29,752
Realized loss on sales of investments, net	(51,601)	(18,550)	(74,916)	(18,550)
Unrealized gain (loss) on investments, net	488	(65,103)	57,609	(176,354)
Gain on derivative instruments, net	116,012	106,412	48,745	326,623
Total other gains, net	64,899	22,759	31,438	131,719
Noninterest Expense [Abstract]
Compensation and benefits	(3,617)	(3,402)	(7,367)	(6,868)
Other general and administrative	(3,580)	(3,799)	(7,202)	(7,441)
Other operating expenses	(435)	(295)	(861)	(616)
Total operating expenses	(7,632)	(7,496)	(15,430)	(14,925)
Net income	54,337	29,336	12,616	146,546
Preferred stock dividends	(1,923)	(1,923)	(3,847)	(3,847)
Net (loss) income to common stockholders	52,414	27,413	8,769	142,699
Other comprehensive income:
Unrealized (loss) gain on available-for-sale investments, net	(9,443)	(60,910)	5,350	(152,250)
Total other comprehensive (loss) gain	(9,443)	(60,910)	5,350	(152,250)
Comprehensive income (loss) to common shareholders	$ 42,971	$ (33,497)	$ 14,119	$ (9,551)
Weighted average common shares-basic (in shares)	54,137,327	39,190,251	53,981,463	37,964,617
Weighted average common shares-diluted (in shares)	54,585,082	39,558,462	54,327,385	38,332,828
Net income (loss) per common share-basic (in dollars per share)	$ 0.97	$ 0.70	$ 0.16	$ 3.76
Net income (loss) per common share-diluted (in dollars per share)	0.96	0.69	0.16	3.72
Common Stock, Dividends, Per Share, Declared	$ 0.39	$ 0.39	$ 0.78	$ 0.78