Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets [Abstract]
Cash and cash equivalents	$ 300,108	$ 332,035
Cash collateral posted to counterparties	132,646	117,842
Mortgage-backed securities (including pledged of $4,441,105 and $2,810,957, respectively), at fair value	5,059,308	3,112,705
Due from counterparties	1,364	10,348
Derivative assets	174	7,102
Accrued interest receivable	22,988	15,260
Other assets, net	9,367	9,942
Total assets	5,525,955	3,605,234
Liabilities:
Repurchase agreements	4,201,901	2,644,405
Due to counterparties	371,576	4,159
Derivative liabilities	23,621	22,595
Cash collateral posted by counterparties	0	435
Accrued interest payable	33,794	16,450
Accrued dividends payable	9,440	9,103
Other liabilities	4,661	6,759
Total liabilities	4,644,993	2,703,906
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; 54,204,319 and 53,637,095 shares issued and outstanding, respectively	542	536
Additional paid-in capital	1,365,484	1,357,514
Accumulated other comprehensive loss	(175,996)	(181,346)
Accumulated deficit	(416,911)	(383,219)
Total shareholders’ equity	880,962	901,328
Total liabilities and shareholders’ equity	$ 5,525,955	$ 3,605,234