Condensed Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income	$ 67,646	$ 50,107	$ 169,581	$ 128,030
Interest expense	(67,306)	(58,705)	(172,428)	(149,593)
Net interest (expense) income	340	(8,598)	(2,847)	(21,563)
Realized gains (losses) on mortgage-backed securities	510	0	510	0
Unrealized gains (losses) on mortgage-backed securities and U.S. Treasury securities	161,564	(208,932)	73,699	(224,576)
(Losses) gains on derivative and other hedging instruments	(140,825)	142,042	(26,858)	194,253
Net portfolio income (loss)	21,589	(75,488)	44,504	(51,886)
Management fees	2,449	2,870	6,867	8,216
Allocated overhead	637	557	1,967	1,772
Incentive compensation	269	322	470	1,110
Directors' fees and liability insurance	343	345	1,015	986
Audit, legal and other professional fees	269	301	1,065	1,200
Direct REIT operating expenses	216	193	564	531
Other administrative	86	56	439	652
Total expenses	4,269	4,644	12,387	14,467
Net income (loss)	17,320	(80,132)	32,117	(66,353)
Unrealized gains on U.S. Treasury securities measured at fair value through other comprehensive net income (loss)	48	16	38	16
Comprehensive net income (loss)	$ 17,368	$ (80,116)	$ 32,155	$ (66,337)
Basic and diluted net income (loss) per share (in dollars per share)	$ 0.24	$ (1.68)	$ 0.53	$ (1.58)
Weighted Average Shares Outstanding (in shares)	72,377,373	47,773,409	60,700,959	42,103,532