CONSOLIDATED STATEMENTS OF CASH FLOWS, (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ (42,427,000)	$ 14,130,000
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Stock based compensation and equity plan amortization	114,000	158,000
Realized and unrealized (gains) losses on mortgage-backed securities	(12,252,000)	(44,902,000)
Derivative, Gain (Loss) on Derivative, Net	74,822,000	43,257,000
Changes in operating assets and liabilities
Accrued interest receivable	2,163,000	(624,000)
Other assets	(580,000)	162,000
Accrued interest payable	(10,395,000)	3,609,000
Other liabilities	671,000	(116,000)
Due to affiliates	(53,000)	(100,000)
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	12,063,000	15,574,000
From mortgage-backed securities investments
Purchases	(1,985,756,000)	(2,164,094,000)
Sales	2,023,334,000	1,689,747,000
Principal repayments	260,834,000	229,633,000
Proceeds from U.S. Treasury Securities	139,712,000	0
Net payments on reverse repurchase agreements	(139,738,000)	0
Payments on net settlement of to-be-announced securities	(6,888,000)	(10,559,000)
Purchase of interest rate swaptions, net of margin cash received	64,190,000	19,649,000
NET CASH USED IN INVESTING ACTIVITIES	227,308,000	(274,922,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from repurchase agreements	20,879,112,000	22,265,665,000
Principal payments on repurchase agreements	(21,152,479,000)	(21,961,190,000)
Cash dividends	(28,008,000)	(24,271,000)
Proceeds From Issuance Of Common Stock, net of issuance costs	19,447,000	36,998,000
Payments For Repurchase Of Common Stock	68,000	3,024,000
NET CASH PROVIDED BY FINANCING ACTIVITIES	(281,996,000)	314,178,000
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(42,625,000)	54,830,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	278,655,000	126,263,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	236,030,000	181,093,000
Cash paid during the period for:
Interest Paid	31,397,000	37,713,000
Interest Rate Swaption [Member]
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Derivative, Gain (Loss) on Derivative, Net	5,090,000	1,063,000
Swap [Member]
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Derivative, Gain (Loss) on Derivative, Net	64,357,000	35,869,000
TBA Contracts [Member]
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Derivative, Gain (Loss) on Derivative, Net	5,244,000	6,325,000
US Treasury Securities [Member]
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Derivative, Gain (Loss) on Derivative, Net	$ 131,000	$ 0