CONSOLIDATED STATEMENTS OF CASH FLOWS, (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ (208,866,000)	$ (46,234,000)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Stock based compensation and equity plan amortization	404,000	429,000
Realized and unrealized (gains) losses on mortgage-backed securities	66,529,000	6,045,000
Marketable Securities, Unrealized Gain (Loss)	(480,560,000)	(96,147,000)
Derivative, Gain (Loss) on Derivative, Net	(161,731,000)	(13,483,000)
Changes in operating assets and liabilities
Accrued interest receivable	4,927,000	(2,826,000)
Other assets	(583,000)	(172,000)
Accrued interest payable	3,152,000	(115,000)
Other liabilities	198,000	(1,305,000)
Due to affiliates	76,000	162,000
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	184,666,000	38,648,000
From mortgage-backed securities investments
Purchases	(190,638,000)	(2,986,864,000)
Sales	1,934,606,000	1,680,903,000
Principal repayments	279,534,000	259,425,000
Note proceeds from (payments on) derivative instruments	(167,307,000)	17,446,000
NET CASH USED IN INVESTING ACTIVITIES	2,190,809,000	(1,063,982,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from repurchase agreements	22,121,707,000	13,582,422,000
Principal payments on repurchase agreements	(24,606,833,000)	(12,663,304,000)
Cash dividends	(54,979,000)	(34,927,000)
Proceeds From Issuance Of Common Stock, net of issuance costs	0	221,654,000
Payments For Repurchase Of Common Stock	2,218,000	0
Shares withheld from employee stock awards for payment of taxes	223,000	299,000
NET CASH PROVIDED BY FINANCING ACTIVITIES	(2,542,546,000)	1,105,546,000
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(167,071,000)	80,212,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	450,442,000	299,506,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	283,371,000	379,718,000
Cash paid during the period for:
Interest Paid	7,683,000	3,611,000
Other Noncash Investing And Financing Items Abstract
Securities Sold Settled In Later Period	$ 0	$ 154,977,000