Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Assets
Cash	$ 87,284,000	$ 337,664,000
Cash collateral posted to counterparties	30,806,000	18,552,000
Investments in securities, at fair value:
Derivatives, at fair value	984,456,000	199,073,000
Accrued interest receivable	28,809,000	10,570,000
Prepaid and other	2,101,000	1,094,000
Subordinated loan to BUCKLER	105,000,000	105,000,000
Total Assets	9,437,047,000	5,277,307,000
Liabilities:
Repurchase agreements, net (including $3,247,474 and $1,963,679, respectively with BUCKLER)	6,463,058,000	3,948,037,000
Obligations to return securities received as collateral, at fair value (including $100,531 with BUCKLER)	502,656,000	0
Cash collateral posted by counterparties	963,591,000	171,060,000
Payable for unsettled purchases	353,436,000	0
Derivatives, at fair value	13,016,000	10,900,000
Accrued interest payable- repurchase agreements (including $9,908 and $457, respectively with BUCKLER)	19,096,000	944,000
Accrued interest payable- U.S. Treasury Securities sold short (including $684 with BUCKLER)	3,418,000	0
Accounts payable and other accrued expenses	6,404,000	2,727,000
Total Liabilities	8,324,675,000	4,133,668,000
Commitments and contingencies (Note 8)
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Common stock, $0.001 par value, 300,000 and 200,000 shares authorized; 162,911 shares and 94,152 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively.	163,000	94,000
Additional paid-in capital	3,874,627,000	3,403,127,000
Cumulative distributions to stockholders	(1,992,361,000)	(1,837,955,000)
Accumulated net loss	(758,537,000)	(528,607,000)
Accumulated other comprehensive income (loss)	(11,527,000)	106,973,000
Total Stockholders’ Equity	1,112,372,000	1,143,639,000
Total Liabilities and Stockholders’ Equity	9,437,047,000	5,277,307,000
Series C Preferred Stock
Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Preferred stock, $0.001 par value, 50,000 shares authorized; 7.00% Series C Cumulative Preferred Stock; 6,847 shares issued and outstanding ($171,175 aggregate liquidation preference) at December 31, 2022 and December 31, 2021.	7,000	7,000
Agency Securities
Investments in securities, at fair value:
Debt securities	8,198,591,000	4,406,521,000
U.S. Treasury Securities
Investments in securities, at fair value:
Debt securities	$ 0	$ 198,833,000