CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities
Net income (loss)	$ (337,957)	$ (83,033)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Amortization of mortgage-backed and other securities premiums and (discounts), net	2,333	20,389
Realized and unrealized (gain) loss on derivative instruments, net	(405,752)	(109,798)
(Gain) loss on investments, net	829,264	259,237
Increase (decrease) in provision for credit losses	0	(1,768)
(Gain) loss from investments in unconsolidated ventures in excess of distributions received	37	24
Other amortization	(9,702)	(10,427)
Changes in operating assets and liabilities:
(Increase) decrease in operating assets	2,182	(1,108)
Increase (decrease) in operating liabilities	374	(39)
Net cash provided by (used in) operating activities	80,779	73,477
Cash Flows from Investing Activities
Purchase of mortgage-backed securities	(14,442,287)	(11,003,833)
Purchase of U.S. Treasury securities	(502,290)	0
Distributions from investments in unconsolidated ventures, net	8,524	2,425
Principal payments from mortgage-backed securities	264,791	416,524
Proceeds from sale of mortgage-backed securities	17,264,232	9,755,377
Proceeds from the sale of U.S. Treasury securities	468,051	0
Settlement (termination) of forwards, swaps, swaptions and TBAs, net	424,661	126,303
Net change in due from counterparties and collateral held payable on derivative instruments	(3,897)	(942)
Net cash provided by (used in) investing activities	3,481,785	(704,146)
Cash Flows from Financing Activities
Proceeds from issuance of common stock	0	307,618
Redemption of preferred stock	0	(140,038)
Repurchase of preferred stock	(14,565)	0
Cash paid in lieu of fractional shares in connection with one-for-ten reverse stock split	(1)	0
Proceeds from repurchase agreements	35,949,170	54,825,005
Principal repayments of repurchase agreements	(39,674,474)	(54,202,500)
Net change in due from counterparties and collateral held payable on repurchase agreements	7,099	(1,516)
Payments of deferred costs	(184)	(281)
Payments of dividends	(75,875)	(62,153)
Net cash provided by (used in) financing activities	(3,808,830)	726,135
Net change in cash, cash equivalents and restricted cash	(246,266)	95,466
Cash, cash equivalents and restricted cash, beginning of period	577,052	392,584
Cash, cash equivalents and restricted cash, end of period	330,786	488,050
Supplement Disclosure of Cash Flow Information
Interest paid	10,713	6,406
Non-cash Investing and Financing Activities Information
Net change in unrealized gain (loss) on mortgage-backed securities classified as available-for-sale	(4,246)	2,136
Dividends declared not paid	29,722	26,071
Net change in investment related receivable (payable)	(791)	(5)
Offering costs not paid	310	647
Change in foreign currency translation adjustment on other investments	$ 293	$ 23