Condensed Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income	$ 38,012	$ 41,857
Interest expense	(42,217)	(2,655)
Net interest (expense) income	(4,205)	39,202
Unrealized gains (losses) on mortgage-backed securities and U.S. Treasury Notes	53,895	(309,962)
(Losses) gains on derivative and other hedging instruments	(41,156)	177,498
Net portfolio income (loss)	8,534	(144,348)
Management fees	2,642	2,634
Allocated overhead	576	441
Incentive compensation	470	237
Directors' fees and liability insurance	323	311
Audit, legal and other professional fees	451	304
Direct REIT operating expenses	165	325
Other administrative	377	127
Total expenses	5,004	4,379
Net income (loss)	$ 3,530	$ (148,727)
Basic and diluted net income (loss) per share (in dollars per share)	$ 0.09	$ (4.20)
Weighted Average Shares Outstanding (in shares)	38,491,767	35,399,513
Dividends declared per common share (in dollars per share)	$ 0.480	$ 0.775
Collateralized Mortgage-Backed Securities [Member]
Realized losses on mortgage-backed securities	$ 0	$ (51,086)