Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income	$ 83,458	$ 63,271	$ 231,038	$ 136,329
Interest Expense, Operating	82,564	65,533	232,048	141,983
Net interest income (expense)	894	(2,262)	(1,010)	(5,654)
Realized loss on sales of investments, net	0	0	(1,506)	(74,916)
Unrealized gain (loss) on investments, net	192,874	(179,100)	80,873	(121,491)
(Loss) gain on derivative instruments, net	(154,064)	146,953	11,707	195,698
Total other gains (losses), net	38,810	(32,147)	91,074	(709)
Noninterest Expense [Abstract]
Compensation and benefits	(4,534)	(4,572)	(14,994)	(11,939)
Other general and administrative	(3,737)	(3,269)	(10,799)	(10,471)
Other operating expenses	(436)	(801)	(1,459)	(1,662)
Total operating expenses	(8,707)	(8,642)	(27,252)	(24,072)
Net income (loss)	30,997	(43,051)	62,812	(30,435)
Preferred stock dividends	(1,923)	(1,923)	(5,770)	(5,770)
Net income (loss) to common shareholders	29,074	(44,974)	57,042	(36,205)
Other comprehensive income:
Unrealized gain (loss) on available-for-sale investments, net	41,667	(41,774)	22,613	(36,424)
Total other comprehensive income (loss)	41,667	(41,774)	22,613	(36,424)
Comprehensive income (loss) to common shareholders	$ 70,741	$ (86,748)	$ 79,655	$ (72,629)
Weighted average common shares-basic (in shares)	75,792,527	54,556,853	67,313,385	54,175,367
Weighted average common shares-diluted (in shares)	76,366,487	54,556,853	67,808,892	54,175,367
Net income (loss) per common share-basic (in dollars per share)	$ 0.38	$ (0.82)	$ 0.85	$ (0.67)
Net income (loss) per common share-diluted (in dollars per share)	$ 0.38	$ (0.82)	$ 0.84	$ (0.67)