CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows From Operating Activities:
Net (loss)/income	$ (238,291)	$ 284,747
Adjustments to reconcile net income to net cash provided by operating activities:
Losses/(gains) on residential whole loans and real estate owned, net	770,534	(67,844)
Losses/(gains) on securities, net	2,760	(1,969)
Impairment and other gains and losses on securities available-for-sale and other assets	0	(49,039)
Accretion of purchase discounts and amortization of purchase premiums on residential whole loans and securities, and amortization of terminated hedging instruments	(12,054)	(23,295)
Provision/(reversal of provision) for credit losses on residential whole loans and other assets	26,203	(43,550)
Net gains on derivatives used for risk management purposes	(260,624)	0
Net mark-to-market on Securitized debt measured at fair value	(247,970)	0
Unrealized loss on loan originator investment	13,395	0
Net other non-cash losses included in net income	21,134	16,112
Decrease in other assets	291,245	20,484
Decrease in other liabilities	(4,764)	(26,574)
Net cash provided by operating activities	361,568	109,072
Cash Flows From Investing Activities:
Purchases of residential whole loans, loan related investments and capitalized advances	(2,699,331)	(2,877,090)
Principal payments on residential whole loans and loan related investments	1,536,863	1,433,199
Increase in cash balances resulting from Lima One purchase transaction, net	0	6,122
Proceeds from sales of securities and other assets	15,660	0
Principal payments on securities	3,427	130,686
Purchases of real estate owned and capital improvements	(845)	(1,087)
Proceeds from sales of real estate owned	105,151	133,157
Additions to leasehold improvements, furniture and fixtures	(1,531)	(50,735)
Net cash used in investing activities	(1,040,606)	(1,225,748)
Cash Flows From Financing Activities:
Principal payments on financing agreements with mark-to-market collateral provisions	(2,745,242)	(941,468)
Proceeds from borrowings under financing agreements with mark-to-market collateral provisions	2,307,260	2,009,691
Principal payments on other collateralized financing agreements	(1,655,260)	(1,484,127)
Proceeds from borrowings under other collateralized financing agreements	3,248,756	1,582,982
Payment made for other collateralized financing agreement related costs	(14,646)	(6,847)
Principal payment on redemption of Senior notes	0	(100,000)
Proceeds from issuances of common stock	1,156	1,297
Payments made for the repurchase of common stock through the stock repurchase program	(102,311)	(48,075)
Dividends paid on preferred stock	(24,656)	(24,656)
Dividends paid on common stock and dividend equivalents	(139,070)	(111,892)
Net cash provided by/(used in) financing activities	875,987	876,905
Net increase in cash, cash equivalents and restricted cash	196,949	(239,771)
Cash, cash equivalents and restricted cash at beginning of period	404,447	821,519
Cash, cash equivalents and restricted cash at end of period	601,396	581,748
Supplemental Disclosure of Cash Flow Information
Interest Paid	151,747	81,636
Non-cash Investing and Financing Activities:
Transfer from residential whole loans to real estate owned	61,875	50,043
Dividends and dividend equivalents declared and unpaid	44,964	44,247
Payable for unsettled residential whole loan purchases	0	163,015
Right-of-use lease asset and lease liability	0	40,893
Repayment of Lima One preferred stock in connection with the Lima One transaction	$ 0	$ 22,030