Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Cash Flows From Operating Activities:
Net Income (Loss)	$ (58,591,000)	$ (66,434,000)	$ (69,174,000)	$ 71,327,000	$ (125,025,000)	$ 2,153,000
Adjustments to reconcile net income (loss) to net cash and cash collateral posted to counterparties provided by (used in) operating activities:
Net amortization of premium on Agency Securities					13,464,000	28,175,000
Realized (gain) loss on sale of Agency Securities, available for sale	7,501,000		0		7,501,000	(7,354,000)
Stock based compensation					1,894,000	2,404,000
Changes in operating assets and liabilities:
(Increase) decrease in accrued interest receivable					(10,402,000)	2,985,000
(Increase) decrease in prepaid and other assets					(2,012,000)	283,000
Change in derivatives, at fair value					(580,506,000)	(36,155,000)
Increase (decrease) in accrued interest payable- repurchase agreements					4,438,000	(1,077,000)
Increase in accounts payable and other accrued expenses					2,284,000	2,074,000
Net cash and cash collateral posted to counterparties provided by (used in) operating activities					(73,759,000)	36,919,000
Cash Flows From Investing Activities:
Purchases of Agency Securities					(5,482,336,000)	(469,515,000)
Principal repayments of Agency Securities					287,457,000	502,638,000
Proceeds from sales of Agency Securities					2,197,403,000	901,053,000
Disbursements on reverse repurchase agreements					0	(391,125,000)
Receipts from reverse repurchase agreements					0	391,125,000
Increase in cash collateral posted by counterparties					647,786,000	62,194,000
Net cash and cash collateral posted to counterparties provided by (used in) investing activities					(2,858,572,000)	996,342,000
Cash Flows From Financing Activities:
Issuance of common stock, net of expenses					134,138,000	212,224,000
Proceeds from repurchase agreements					34,679,574,000	15,545,436,000
Principal repayments on repurchase agreements					(31,935,064,000)	(16,420,134,000)
Series C Preferred stock dividends paid					(5,991,000)	(5,482,000)
Common stock dividends paid					(61,265,000)	(43,254,000)
Common stock repurchased					(1,544,000)	0
Net cash and cash collateral posted to counterparties provided by (used in) financing activities					2,809,848,000	(674,625,000)
Net increase (decrease) in cash and cash collateral posted to counterparties					(122,483,000)	358,636,000
Cash and cash collateral posted to counterparties - beginning of period		$ 356,216,000		$ 171,668,000	356,216,000	171,668,000	$ 171,668,000
Cash and cash collateral posted to counterparties - end of period	233,733,000		530,304,000		233,733,000	530,304,000	$ 356,216,000
Supplemental Disclosure:
Cash paid during the period for interest					33,476,000	9,698,000
Non-Cash Investing Activities:
Receivable for unsettled sales					427,203,000	0
Payable for unsettled purchases					(358,753,000)	(206,126,000)
Net unrealized loss on available for sale Agency Securities					(120,689,000)	(27,038,000)
Series C Preferred Stock
Cash Flows From Financing Activities:
Issuance of Series C Preferred stock, net of expenses					0	36,585,000
Series C Preferred stock dividends paid					(5,991,000)
Agency Securities
Adjustments to reconcile net income (loss) to net cash and cash collateral posted to counterparties provided by (used in) operating activities:
Loss on securities	249,022,000		(19,183,000)		503,411,000	43,403,000
U.S. Treasury Securities
Adjustments to reconcile net income (loss) to net cash and cash collateral posted to counterparties provided by (used in) operating activities:
Net accretion of U.S. Treasury Securities					(1,176,000)	0
Loss on securities	$ 33,983,000		$ 0		112,370,000	28,000
Cash Flows From Investing Activities:
Purchases of U.S. Treasury Securities					(3,441,267,000)	(390,126,000)
Proceeds from sales of U.S. Treasury Securities					$ 2,932,385,000	$ 390,098,000