Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets [Abstract]
Cash and cash equivalents	$ 295,715	$ 119,639
Cash collateral posted to counterparties	122,614	118,225
Mortgage-backed securities (including pledged of $5,570,076 and $5,880,747, respectively), at fair value	5,840,559	6,038,948
Derivative assets	8,386	54,361
Accrued interest receivable	27,899	28,727
Other assets, net	9,324	9,850
Total assets	6,304,497	6,369,750
Liabilities:
Repurchase agreements	5,284,708	5,381,104
Derivative liabilities	1,314	0
Cash collateral posted by counterparties	8,507	46,001
Accrued interest payable	35,672	53,194
Accrued dividends payable	10,990	10,320
Other liabilities	4,774	8,396
Total liabilities	5,345,965	5,499,015
Preferred Stock, Liquidation Preference, Value	111,500	111,500
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value $0.01 per share; 50,000,000 shares authorized; 4,460,000 and 4,460,000 shares issued and outstanding, respectively ($111,500 and $111,500 aggregate liquidation preference, respectively)	107,843	107,843
Common stock, par value $0.01 per share, 180,000,000 shares authorized; 64,160,931 and 57,038,247 shares issued and outstanding, respectively	641	570
Additional paid-in capital	1,494,893	1,404,431
Accumulated other comprehensive loss	(175,770)	(158,502)
Accumulated deficit	(469,075)	(483,607)
Total shareholders’ equity	958,532	870,735
Total liabilities and shareholders’ equity	$ 6,304,497	$ 6,369,750