CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows From Operating Activities:
Net (loss)/income	$ (82,906)	$ 85,522
Adjustments to reconcile net income to net cash provided by operating activities:
(Gains)/losses on residential whole loans and real estate owned, net	277,273	(35,893)
(Gains)/losses on securities, net	2,921	(100)
Accretion of purchase discounts and amortization of purchase premiums on residential whole loans and securities, and amortization of terminated hedging instruments	(4,135)	(9,645)
(Reversal of provision)/provision for credit and valuation losses on residential whole loans and other financial instruments	(4,038)	(23,967)
Net other non-cash (gains)/losses included in net income	(134,618)	5,212
(Increase)/Decrease in other assets	78,454	(1,939)
Increase/(Decrease) in other liabilities	609	4,975
Net cash provided by operating activities	133,560	24,165
Cash Flows From Investing Activities:
Purchases of residential whole loans, loan related investments and capitalized advances	(1,192,437)	(184,707)
Proceeds from sales of residential whole loans, and residential whole loan repurchases	0	0
Principal payments on residential whole loans and loan related investments	567,114	425,300
Proceeds from sales of securities and other assets	369	0
Principal payments on securities	1,470	58,896
Purchases of real estate owned and capital improvements	(353)	(217)
Proceeds from sales of real estate owned	41,336	50,619
Additions to leasehold improvements, furniture and fixtures	(953)	(4,415)
Net cash (used in)/provided by investing activities	(583,454)	345,476
Cash Flows From Financing Activities:
Principal payments on financing agreements with mark-to-market collateral provisions	(586,883)	(821,716)
Proceeds from borrowings under financing agreements with mark-to-market collateral provisions	965,270	663,926
Principal payments on other collateralized financing agreements	(761,122)	(521,259)
Proceeds from borrowings under other collateralized financing agreements	1,096,258	437,915
Payment made for other collateralized financing agreement related costs	(2,870)	(1,371)
Principal payment on redemption of Senior notes	0	(100,000)
Proceeds from issuances of common stock	581	376
Payments made for the repurchase of common stock through the stock repurchase program	(54,799)	(20,933)
Dividends paid on preferred stock	(8,219)	(8,219)
Dividends paid on common stock and dividend equivalents	(47,230)	(34,015)
Net cash provided by/(used in) financing activities	600,986	(405,296)
Net (decrease)/increase in cash, cash equivalents and restricted cash	151,092	(35,655)
Cash, cash equivalents and restricted cash at beginning of period	404,447	821,519
Cash, cash equivalents and restricted cash at end of period	555,539	785,864
Supplemental Disclosure of Cash Flow Information
Interest Paid	34,727	29,554
Non-cash Investing and Financing Activities:
Transfer from residential whole loans to real estate owned	22,079	20,068
Dividends and dividend equivalents declared and unpaid	46,357	33,640
Payable for unsettled residential whole loan and Treasury Bill purchases	$ 329,706	$ 112,202