CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities:
Net income/(loss)	$ (725,207)	$ 277,496
Adjustments to reconcile net income to net cash provided by operating activities:
Losses/(gains) on residential whole loans and real estate owned, net	280,142	(61,125)
Gains on residential mortgage securities and MSR related assets, net	(71,569)	(58,005)
Impairment and other losses on securities available-for-sale and other assets	424,966	0
Losses on terminated swaps previously designated as hedges and other	57,034	0
Accretion of purchase discounts on residential mortgage securities, residential whole loans and MSR-related assets	(27,585)	(45,990)
Amortization of purchase premiums on residential mortgage securities and residential whole loans, and amortization of terminated hedging instruments	40,952	32,085
Provision for credit and valuation losses on residential whole loans and other financial instruments	38,090	0
Net valuation and other non-cash losses included in net income	16,388	22,026
Decrease/(increase) in other assets	459	(24,647)
(Decrease)/increase in other liabilities	(16,919)	11,756
Net cash provided by operating activities	16,751	153,596
Cash Flows From Investing Activities:
Purchases of residential whole loans, loan related investments and capitalized advances	(1,345,422)	(2,988,229)
Proceeds from sales of residential whole loans	1,521,060	0
Principal payments on residential whole loans	1,261,319	906,072
Principal payments on residential mortgage securities and MSR-related assets	609,758	1,555,449
Proceeds from sales of residential mortgage securities, MSR-related assets, and other assets	3,790,148	735,768
Purchases of residential mortgage securities and MSR-related assets	(163,748)	(837,591)
Proceeds from sales of real estate owned	203,603	81,206
Purchases of real estate owned and capital improvements	(9,334)	(15,671)
Additions to leasehold improvements, furniture and fixtures	(1,425)	(1,351)
Net cash provided by/(used in) investing activities	5,865,959	(564,347)
Cash Flows From Financing Activities:
Principal payments on financing agreements with mark-to-market collateral provisions	(21,401,578)	(54,103,776)
Proceeds from borrowings under financing agreements with mark-to-market collateral provisions	13,749,720	54,796,010
Principal payments on financing agreements with non-mark-to-market collateral provisions	(312,638)	0
Proceeds from borrowings under financing agreements with non-mark-to-market collateral provisions	2,036,597	0
Principal payments made on senior secured credit agreement	(18,750)	0
Proceeds from issuance of senior secured credit agreement	480,959	0
Principal payments on securitized debt	(133,450)	(79,350)
Proceeds from issuance of securitized debt	391,154	0
Proceeds from issuance of convertible senior notes	0	223,311
Payments made for settlements and unwinds of Swaps	(88,405)	(47,622)
Proceeds from issuance of series C preferred stock	275,000	0
Payments made for costs related to series C preferred stock issuance	(8,948)	0
Proceeds from issuances of common stock	725	8,861
Proceeds from the issuance of warrants	14,041	0
Dividends paid on preferred stock	(21,578)	(11,250)
Dividends paid on common stock and dividend equivalents	(90,749)	(270,951)
Net cash (used in)/provided by financing activities	(5,127,900)	515,233
Net increase in cash, cash equivalents and restricted cash	754,810	104,482
Cash, cash equivalents and restricted cash at beginning of period	134,664	88,709
Cash, cash equivalents and restricted cash at end of period	889,474	193,191
Supplemental Disclosure of Cash Flow Information
Interest Paid	213,318	237,644
Non-cash Investing and Financing Activities:
Transfer from residential whole loans to real estate owned	74,891	193,531
Dividends and dividend equivalents declared and unpaid	22,758	90,614
Payable for unsettled residential whole loan purchases	$ 0	$ 59,524