MFA Financial (MFA) 10-Q 5 Nov 21 2021 Q3 Quarterly report Financial data

Cover page

Cover page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 28, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-13991
Entity Registrant Name	MFA FINANCIAL, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	13-3974868
Entity Address, Address Line One	One Vanderbilt Ave., 48th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10017
City Area Code	212
Local Phone Number	207-6400
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		440,926,797
Entity Central Index Key	0001055160
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Common Stock, par value $0.01 per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	MFA
Security Exchange Name	NYSE
7.50% Series B Cumulative Redeemable Preferred Stock, par value $0.01 per share
Entity Information [Line Items]
Title of 12(b) Security	7.50% Series B Cumulative RedeemablePreferred Stock, par value $0.01 per share
Trading Symbol	MFA/PB
Security Exchange Name	NYSE
6.50% Series C Cumulative Redeemable Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	6.50% Series C Cumulative RedeemablePreferred Stock, par value $0.01 per share
Trading Symbol	MFA/PC
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Assets:
Residential whole loans, net ($4,093,598 and $1,216,902 held at fair value, respectively) (1)(2)	[1],[2]	$ 7,081,462	$ 5,325,401
Securities, at fair value	[2]	283,037	399,999
Cash and cash equivalents		526,241	814,354
Restricted cash		55,507	7,165
Other assets	[2]	541,603	385,381
Total Assets		8,487,850	6,932,300
Liabilities:
Financing agreements ($2,496,584 and $3,366,772 held at fair value, respectively)		5,550,808	4,336,976
Other liabilities		335,955	70,522
Total Liabilities		5,886,763	4,407,498
Commitments and contingencies (See Note 10)
Stockholders’ Equity:
Common stock, $0.01 par value; 874,300 and 874,300 shares authorized; 440,927 and 451,714 shares issued and outstanding, respectively		4,409	4,517
Additional paid-in capital, in excess of par		3,807,237	3,848,129
Accumulated deficit		(1,267,504)	(1,405,327)
Accumulated other comprehensive income		56,755	77,293
Total Stockholders’ Equity		2,601,087	2,524,802
Total Liabilities and Stockholders’ Equity		8,487,850	6,932,300
Series B Preferred Stock
Stockholders’ Equity:
Preferred stock		80	80
Series C Preferred Stock
Stockholders’ Equity:
Preferred stock		$ 110	$ 110
[1]	Includes approximately $2.3 billion and $1.8 billion of Residential whole loans transferred to consolidated variable interest entities (“VIEs”) at September 30, 2021 and December 31, 2020, respectively. Such assets can be used only to settle the obligations of each respective VIE.
[2]	See Note 6 for information regarding the Company’s pledged assets.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Residential whole loans, fair value	$ 4,093,598	$ 1,216,902
Financial agreements held at fair value	$ 2,496,584	$ 3,366,772
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	874,300	874,300
Common stock, shares issued (in shares)	440,927	451,714
Common stock, shares outstanding (in shares)	440,927	451,714
Non-Agency MBS Transferred to Consolidated VIEs
Residential whole loans, at carrying value	$ 2,300,000	$ 1,800,000
Series B Preferred Stock
Preferred stock par value (usd per share)	$ 0.01	$ 0.01
Preferred Stock, dividend rate	7.50%
Preferred stock, shares authorized (in shares)	8,050	8,050
Preferred stock, shares issued (in shares)	8,000	8,000
Preferred stock, shares outstanding (in shares)	8,000	8,000
Preferred stock, liquidation preference, value	$ 200,000	$ 200,000
Series C Preferred Stock
Preferred stock par value (usd per share)	$ 0.01	$ 0.01
Preferred Stock, dividend rate	6.50%
Preferred stock, shares authorized (in shares)	12,650	12,650
Preferred stock, shares issued (in shares)	11,000	11,000
Preferred stock, shares outstanding (in shares)	11,000	11,000
Preferred stock, liquidation preference, value	$ 275,000	$ 275,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest Income:
Residential whole loans	$ 79,602	$ 70,948	$ 213,156	$ 261,819
Securities, at fair value	10,629	8,570	42,433	81,867
Other interest-earning assets	524	3,017	632	9,089
Cash and cash equivalent investments	126	100	239	646
Interest Income	90,881	82,635	256,460	353,421
Interest Expense:
Asset-backed and other collateralized financing arrangements	25,135	50,054	72,827	209,998
Other interest expense	3,930	5,910	11,863	17,716
Interest Expense	29,065	55,964	84,690	227,714
Net Interest Income	61,816	26,671	171,770	125,707
Reversal/(Provision) for credit and valuation losses on residential whole loans and other financial instruments	9,709	27,244	41,326	(38,090)
Net Interest Income after Provision for Credit and Valuation Losses	71,525	53,915	213,096	87,617
Other Income, net:
Net gain/(loss) on residential whole loans measured at fair value through earnings	21,815	60,316	59,325	(10,082)
Gain on investment in Lima One common equity (Note 16)	38,933	0	38,933	0
Impairment and other gains and losses on securities available-for-sale and other assets	10,000	(221)	10,000	(424,966)
Lima One - origination, servicing and other fee income	9,643	0	9,643	0
Net gain/(loss) on real estate owned	6,829	4,503	13,725	293
Net realized gain/(loss) on sales of securities and residential whole loans	0	48	0	(188,847)
Loss on terminated swaps previously designated as hedges for accounting purposes	0	(7,177)	0	(57,034)
Other, net	7,226	3,086	18,787	(11,355)
Other Income/(Loss), net	94,446	60,555	150,413	(691,991)
Operating and Other Expense:
Compensation and benefits	16,210	11,657	33,533	29,134
Other general and administrative expense	8,659	6,611	23,338	18,656
Loan servicing, financing and other related costs	5,291	8,992	18,591	28,609
Amortization of Intangible Assets	3,300	0	3,300	0
Costs associated with restructuring/forbearance agreement	0	0	0	44,434
Operating and Other Expense	33,460	27,260	78,762	120,833
Net Income/(Loss)	132,511	87,210	284,747	(725,207)
Less Preferred Stock Dividend Requirement	8,218	8,219	24,656	21,578
Net Income/(Loss) Available to Common Stock and Participating Securities	$ 124,293	$ 78,991	$ 260,091	$ (746,785)
Basic Earnings per Common Share (usd per share)	$ 0.28	$ 0.17	$ 0.58	$ (1.65)
Diluted Earnings per Common Share (usd per share)	$ 0.27	$ 0.17	$ 0.57	$ (1.65)

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 132,511	$ 87,210	$ 284,747	$ (725,207)
Other Comprehensive (Loss):
Unrealized (losses)/gains on securities available-for-sale	(8,029)	15,082	(21,473)	408,585
Reclassification adjustment for securities sales included in net income	0	(60)	0	(389,127)
Reclassification adjustment for impairments included in net income	0	0	0	(344,269)
Derivative hedging instrument fair value changes, net	0	0	0	(50,127)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk	209	(22,652)	935	(22,652)
Reclassification adjustment for losses related to hedging instruments included in net income	0	7,176	0	72,802
Other Comprehensive (Loss)	(7,820)	(454)	(20,538)	(324,788)
Comprehensive income/(loss) before preferred stock dividends	124,691	86,756	264,209	(1,049,995)
Dividends required on preferred stock	(8,218)	(8,219)	(24,656)	(21,578)
Comprehensive Income/(Loss) Available to Common Stock and Participating Securities	$ 116,473	$ 78,537	$ 239,553	$ (1,071,573)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands		Total	Series C Preferred Stock		Series B Preferred Stock		Preferred StockSeries C Preferred Stock	Preferred StockSeries B Preferred Stock	Common Stock	Additional Paid-in Capital	Additional Paid-in CapitalSeries C Preferred Stock	Accumulated Deficit	Accumulated DeficitSeries C Preferred Stock		Accumulated DeficitSeries B Preferred Stock		Accumulated Other Comprehensive Income	Revision of Prior Period, Accounting Standards Update, Adjustment	Revision of Prior Period, Accounting Standards Update, AdjustmentAccumulated Deficit
Balance (in shares) at Dec. 31, 2019							0	8,000	452,369
Balance at Dec. 31, 2019		$ 3,383,952					$ 0	$ 80	$ 4,524	$ 3,640,341		$ (631,040)					$ 370,047	$ (8,326)	$ (8,326)
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		(908,995)										(908,995)
Issuance of stock, net of expenses (in shares)							11,000		1,106
Issuance of stock, net of expenses		687	$ 266,029				$ 110		$ 7	680	$ 265,919
Repurchase of shares of common stock (in shares)	[1]								(337)
Repurchase of shares of common stock	[1]	(2,652)								(2,652)
Equity based compensation expense		1,266								1,266
Change in accrued dividends attributable to stock-based awards		1,059								1,059
Change in unrealized gains on securities, net		(243,812)															(243,812)
Derivative hedging instrument fair value changes and amortization, net		(48,533)															(48,533)
Balance (in shares) at Mar. 31, 2020							11,000	8,000	453,138
Balance at Mar. 31, 2020		2,440,675					$ 110	$ 80	$ 4,531	3,906,613		(1,548,361)					77,702
Balance (in shares) at Dec. 31, 2019							0	8,000	452,369
Balance at Dec. 31, 2019		3,383,952					$ 0	$ 80	$ 4,524	3,640,341		(631,040)					370,047	$ (8,326)	$ (8,326)
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		(725,207)
Dividends declared on preferred stock		(21,578)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		(22,652)
Balance (in shares) at Sep. 30, 2020							11,000	8,000	453,333
Balance at Sep. 30, 2020		2,565,656					$ 110	$ 80	$ 4,533	3,924,584		(1,408,910)					45,259
Balance (in shares) at Mar. 31, 2020							11,000	8,000	453,138
Balance at Mar. 31, 2020		2,440,675					$ 110	$ 80	$ 4,531	3,906,613		(1,548,361)					77,702
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		96,578										96,578
Issuance of stock, net of expenses (in shares)									106
Issuance of stock, net of expenses		37							$ 1	36
Equity based compensation expense		1,709								1,709
Change in unrealized gains on securities, net		(96,021)															(96,021)
Derivative hedging instrument fair value changes and amortization, net		64,032															64,032
Warrants Issued		14,041								14,041
Balance (in shares) at Jun. 30, 2020							11,000	8,000	453,244
Balance at Jun. 30, 2020		2,521,051					$ 110	$ 80	$ 4,532	3,922,399		(1,451,783)					45,713
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		87,210										87,210
Issuance of stock, net of expenses (in shares)									89
Issuance of stock, net of expenses		1							$ 1	0
Equity based compensation expense		2,266								2,266
Change in accrued dividends attributable to stock-based awards		(81)								(81)
Dividends declared on common stock		(22,667)										(22,667)
Dividends declared on preferred stock		(8,219)	(10,328)	[2]	$ (11,250)	[2]							$ (10,328)	[2]	$ (11,250)	[2]
Dividends attributable to dividend equivalents		(92)										(92)
Change in unrealized gains on securities, net		15,022															15,022
Derivative hedging instrument fair value changes and amortization, net		7,176															7,176
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		(22,652)															(22,652)
Balance (in shares) at Sep. 30, 2020							11,000	8,000	453,333
Balance at Sep. 30, 2020		2,565,656					$ 110	$ 80	$ 4,533	3,924,584		(1,408,910)					45,259
Balance (in shares) at Dec. 31, 2020							11,000	8,000	451,714
Balance at Dec. 31, 2020		2,524,802					$ 110	$ 80	$ 4,517	3,848,129		(1,405,327)					77,293
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		85,522										85,522
Issuance of stock, net of expenses (in shares)									559
Issuance of stock, net of expenses		382							$ 6	376
Repurchase of shares of common stock (in shares)	[3]								(6,159)
Repurchase of shares of common stock	[3]	(25,136)							$ (62)	(25,074)
Equity based compensation expense		1,686								1,686
Change in accrued dividends attributable to stock-based awards		489								489
Dividends declared on common stock		(33,521)										(33,521)
Dividends declared on preferred stock			(4,468)		(3,750)								(4,468)		(3,750)
Dividends attributable to dividend equivalents		(120)										(120)
Change in unrealized gains on securities, net		(3,855)															(3,855)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		235															235
Balance (in shares) at Mar. 31, 2021							11,000	8,000	446,114
Balance at Mar. 31, 2021		2,542,266					$ 110	$ 80	$ 4,461	3,825,606		(1,361,664)					73,673
Balance (in shares) at Dec. 31, 2020							11,000	8,000	451,714
Balance at Dec. 31, 2020		2,524,802					$ 110	$ 80	$ 4,517	3,848,129		(1,405,327)					77,293
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		284,747
Dividends declared on preferred stock		(24,656)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		935
Balance (in shares) at Sep. 30, 2021							11,000	8,000	440,927
Balance at Sep. 30, 2021		2,601,087					$ 110	$ 80	$ 4,409	3,807,237		(1,267,504)					56,755
Balance (in shares) at Mar. 31, 2021							11,000	8,000	446,114
Balance at Mar. 31, 2021		2,542,266					$ 110	$ 80	$ 4,461	3,825,606		(1,361,664)					73,673
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		66,714										66,714
Issuance of stock, net of expenses (in shares)									358
Issuance of stock, net of expenses		398							$ 4	394
Repurchase of shares of common stock (in shares)	[3]								(5,660)
Repurchase of shares of common stock	[3]	(23,741)							$ (57)	(23,684)
Equity based compensation expense		2,741								2,741
Change in accrued dividends attributable to stock-based awards		(288)								(227)		(61)
Dividends declared on common stock		(44,081)										(44,081)
Dividends declared on preferred stock			(4,469)		(3,750)								(4,469)		(3,750)
Dividends attributable to dividend equivalents		(155)										(155)
Change in unrealized gains on securities, net		(9,589)															(9,589)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		491															491
Balance (in shares) at Jun. 30, 2021							11,000	8,000	440,812
Balance at Jun. 30, 2021		2,526,537					$ 110	$ 80	$ 4,408	3,804,830		(1,347,466)					64,575
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		132,511										132,511
Issuance of stock, net of expenses (in shares)									115
Issuance of stock, net of expenses		525							$ 1	524
Equity based compensation expense		2,306								2,306
Change in accrued dividends attributable to stock-based awards		(505)								(423)		(82)
Dividends declared on common stock		(44,093)										(44,093)
Dividends declared on preferred stock		(8,218)	$ (4,469)		$ (3,750)								$ (4,469)		$ (3,750)
Dividends attributable to dividend equivalents		(155)										(155)
Change in unrealized gains on securities, net		(8,029)															(8,029)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		209															209
Balance (in shares) at Sep. 30, 2021							11,000	8,000	440,927
Balance at Sep. 30, 2021		$ 2,601,087					$ 110	$ 80	$ 4,409	$ 3,807,237		$ (1,267,504)					$ 56,755
[1]	For the nine months ended September 30, 2020, includes approximately $2.7 million (337,026 shares) surrendered for tax purposes related to equity-based compensation awards.
[2]	Includes reinstated dividends that were unpaid through June 30, 2020, and were paid during the three months ended September 30, 2020.
[3]	For the nine months ended September 30, 2021 includes approximately $799,000 (213,123 shares) surrendered for tax purposes related to equity-based compensation awards.

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 15, 2021	Aug. 26, 2021	Jun. 15, 2021	May 24, 2021	Mar. 12, 2021	Feb. 19, 2021	Feb. 28, 2020	Apr. 15, 2013	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Common stock, cash dividends declared (in dollars per share)									$ 0.10	$ 0.10	$ 0.075	$ 0.05
Series C Preferred Stock
Preferred Stock, dividend rate													6.50%
Common stock, cash dividends declared (in dollars per share)	$ 0.100		$ 0.100		$ 0.075
Dividend declared per share, preferred stock (in dollars per share)		$ 0.40625		$ 0.40625		$ 0.40625			0.40625	0.40625	0.40625	0.93889
Series B Preferred Stock
Preferred Stock, dividend rate													7.50%
Dividend declared per share, preferred stock (in dollars per share)		$ 0.46875		$ 0.46875		$ 0.46875			0.46875	$ 0.46875	$ 0.46875	1.40625
Preferred Stock | Series C Preferred Stock
Preferred Stock, dividend rate							6.50%						6.50%	6.50%
Preferred Stock, liquidation preference per share (in dollars per share)							$ 25		25			25	$ 25	$ 25
Preferred Stock | Series B Preferred Stock
Preferred Stock, dividend rate								7.50%					7.50%	7.50%
Preferred Stock, liquidation preference per share (in dollars per share)								$ 25	$ 25			$ 25	$ 25	$ 25
Common Stock
Adjustments related to tax withholding for share-based compensation													$ 799	$ 2,700
Shares paid for tax withholding for share based compensation (in shares)													213,123	337,026

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows From Operating Activities:
Net income/(loss)	$ 284,747	$ (725,207)
Adjustments to reconcile net income to net cash provided by operating activities:
(Gains)/losses on residential whole loans and real estate owned, net	(67,844)	280,142
Gains on securities, net	(1,969)	(71,569)
Impairment and other gains and losses on securities available-for-sale and other assets	(49,039)	424,966
Loss on terminated swaps previously designed as hedges for accounting purposes	0	57,034
Accretion of purchase discounts and amortization of purchase premiums on residential whole loans and securities, and amortization of terminated hedging instruments	(23,295)	13,367
(Reversal of provision)/provision for credit and valuation losses on residential whole loans and other financial instruments	(43,550)	38,090
Net other non-cash losses included in net income	16,112	16,388
Decrease in other assets	20,484	459
Decrease in other liabilities	(26,574)	(16,919)
Net cash provided by operating activities	109,072	16,751
Cash Flows From Investing Activities:
Purchases of residential whole loans, loan related investments and capitalized advances	(2,877,090)	(1,345,422)
Proceeds from sales of residential whole loans, and residential whole loan repurchases	0	1,521,060
Principal payments on residential whole loans and loan related investments	1,433,199	1,261,319
Increase in cash balances resulting from Lima One purchase transaction, net	6,122	0
Purchases of securities	0	(163,748)
Proceeds from sales of securities and other assets	0	3,790,148
Principal payments on securities	130,686	609,758
Purchases of real estate owned and capital improvements	(1,087)	(9,334)
Proceeds from sales of real estate owned	133,157	203,603
Additions to leasehold improvements, furniture and fixtures	(50,735)	(1,425)
Net cash (used in)/provided by investing activities	(1,225,748)	5,865,959
Cash Flows From Financing Activities:
Principal payments on financing agreements with mark-to-market collateral provisions	(941,468)	(21,401,578)
Proceeds from borrowings under financing agreements with mark-to-market collateral provisions	2,009,691	13,749,720
Principal payments on other collateralized financing agreements	(1,484,127)	(464,838)
Proceeds from borrowings under other collateralized financing agreements	1,582,982	2,908,710
Payment made for other collateralized financing agreement related costs	(6,847)	0
Principal payment on redemption of Senior notes	(100,000)	0
Payments made for settlements and unwinds of Swaps	0	(88,405)
Proceeds from issuance of series C preferred stock	0	275,000
Payments made for costs related to series C preferred stock issuance	0	(8,948)
Proceeds from issuances of common stock	1,297	725
Proceeds from the issuance of warrants	0	14,041
Payments made for the repurchase of common stock through the share repurchase program	(48,075)	0
Dividends paid on preferred stock	(24,656)	(21,578)
Dividends paid on common stock and dividend equivalents	(111,892)	(90,749)
Net cash provided by/(used in) financing activities	876,905	(5,127,900)
Net (decrease)/increase in cash, cash equivalents and restricted cash	(239,771)	754,810
Cash, cash equivalents and restricted cash at beginning of period	821,519	134,664
Cash, cash equivalents and restricted cash at end of period	581,748	889,474
Supplemental Disclosure of Cash Flow Information
Interest Paid	81,636	213,318
Non-cash Investing and Financing Activities:
Transfer from residential whole loans to real estate owned	50,043	74,891
Dividends and dividend equivalents declared and unpaid	44,247	22,758
Payable for unsettled residential whole loan purchases	163,015	0
Right-of-use lease asset and lease liability	40,893	0
Repayment of Lima One preferred stock in connection with the Lima One transaction (see Note 16)	$ 22,030	$ 0

Organization

Organization	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization MFA Financial, Inc. (the “Company”) was incorporated in Maryland on July 24, 1997 and began operations on April 10, 1998. The Company has elected to be treated as a real estate investment trust (“REIT”) for U.S. federal income tax purposes. In order to maintain its qualification as a REIT, the Company must comply with a number of requirements under federal tax law, including that it must distribute at least 90% of its annual REIT taxable income to its stockholders. The Company has elected to treat certain of its subsidiaries as taxable REIT subsidiaries (“TRS”). In general, a TRS may hold assets and engage in activities that the Company cannot hold or engage in directly and generally may engage in any real estate or non-real estate related business (see Note 2(n)).

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (a) Basis of Presentation and Consolidation The interim unaudited consolidated financial statements of the Company have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted in accordance with these SEC rules and regulations. Management believes that the disclosures included in these interim unaudited consolidated financial statements are adequate to make the information presented not misleading. The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. In the opinion of management, all normal and recurring adjustments necessary to present fairly the financial condition of the Company at September 30, 2021 and results of operations for all periods presented have been made. The results of operations for the three and nine months ended September 30, 2021 should not be construed as indicative of the results to be expected for the full year. The accompanying consolidated financial statements of the Company have been prepared on the accrual basis of accounting in accordance with GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Although the Company’s estimates contemplate current conditions and how it expects them to change in the future, it is reasonably possible that actual conditions could differ from those estimates, which could materially impact the Company’s results of operations and its financial condition. Management has made significant estimates in several areas, impairment, valuation allowances and loss allowances on residential whole loans (see Note 3), MBS, CRT securities and MSR-related assets (collectively, “Securities, at fair value”) (see Note 4) and Other assets (see Note 5), valuation of Securities, at fair value (see Notes 4 and 14), income recognition and valuation of residential whole loans (see Notes 3 and 14), valuation of derivative instruments (see Notes 5(c) and 14) and income recognition on certain Non-Agency MBS (defined below) purchased at a discount (see Note 4). In addition, estimates are used in the determination of taxable income used in the assessment of REIT compliance and contingent liabilities for related taxes, penalties and interest (see Note 2(n)). Actual results could differ from those estimates. The Company has one reportable segment as it manages its business and analyzes and reports its results of operations on the basis of one operating segment: investing, on a leveraged basis, in residential mortgage assets. The consolidated financial statements of the Company include the accounts of all subsidiaries. All intercompany accounts and transactions have been eliminated. In addition, the Company consolidates entities established to facilitate transactions related to the acquisition and securitization of residential whole loans completed in prior years. Certain prior period amounts have been reclassified to conform to the current period presentation. In particular, prior period disclosures have been conformed to the current period presentation of interest income from residential whole loans at fair value. Starting in the second quarter of 2021, interest income for these loans is presented in interest income in the Company’s consolidated statements of operations. Previously, interest income received on residential whole loans at fair value was presented in other income in the Company’s consolidated statements of operations. On July 1, 2021, the Company completed the acquisition of Lima One Holdings, LLC, the parent company of Lima One Capital, LLC (collectively referred to as “Lima One”), a leading nationwide originator and servicer of business purpose loans (“BPLs”). Lima One’s financial results are consolidated with MFA’s results from that date (see Note 16). (b) Residential Whole Loans (including Residential Whole Loans transferred to consolidated VIEs) Residential whole loans included in the Company’s consolidated balance sheets are primarily comprised of pools of fixed- and adjustable-rate residential mortgage loans acquired through consolidated trusts in secondary market transactions or originated by Lima One. The accounting model utilized by the Company is determined at the time each loan package is initially acquired. Prior to the second quarter of 2021, the fair value option was typically elected on loans that were 60 or more days delinquent at purchase (“Purchased Non-performing Loans”). Purchased Credit Deteriorated Loans acquired prior to the second quarter of 2021, and where the underlying borrower had a delinquency status of less than 60 days at the acquisition date, are typically held at carrying value. Purchased Performing Loans acquired prior to the second quarter of 2021 are also typically held at carrying value, but the accounting methods for income recognition and determination and measurement of any required credit loss reserves (as discussed below) differ from those used for Purchased Credit Deteriorated Loans held at carrying value. Starting in the second quarter of 2021, the Company elected the fair value option for all loans acquired, irrespective of borrower delinquency status at acquisition. Over time, the Company expects that election of the fair value option should serve to simplify reporting of the results of its loan investment activities as fair value accounting will be used for the majority of loans in the Company’s portfolio. The accounting model initially applied to loan acquisitions is not permitted to be subsequently changed. Consequently, the Company is not permitted to retroactively apply fair value accounting to loans held at carrying value acquired in periods prior to the second quarter of 2021. The Company’s residential whole loans pledged as collateral against financing agreements are included in the consolidated balance sheets with amounts pledged disclosed in Note 6. Purchases and sales of residential whole loans that are subject to an extended period of due diligence that crosses a reporting date are recorded in our balance sheet at amounts reflecting management’s current estimate of assets that will be acquired or disposed at the closing of the transaction. This estimate is subject to revision at the closing of the transaction, pending the outcome of due diligence performed prior to closing. Residential whole loans purchased under flow arrangements with loan origination partners are generally recorded at the transaction settlement date. Recorded amounts of residential whole loans for which the closing of the purchase transaction is yet to occur are not eligible to be pledged as collateral against any financing agreement until the closing of the purchase transaction. Interest income, credit related losses and changes in the fair value of loans held at fair value are recorded post settlement for acquired loans and until transaction settlement for sold loans (see Notes 3, 6, 7, 14 and 15). Purchased Performing Loans Acquisitions of Purchased Performing Loans to date (which include loans purchased from third parties or loans originated by Lima One and not sold to third parties) have been primarily comprised of: (i) loans to finance (or refinance) one-to-four family residential properties that are not considered to meet the definition of a “Qualified Mortgage” in accordance with guidelines adopted by the Consumer Financial Protection Bureau (“Non-QM loans”), (ii) short-term business purpose loans collateralized by residential properties made to non-occupant borrowers who intend to rehabilitate and sell the property for a profit (“Rehabilitation loans” or “Fix and Flip loans”), (iii) loans to finance (or refinance) non-owner occupied one-to four-family residential properties that are rented to one or more tenants (“Single-family rental loans”), (iv) previously originated loans secured by residential real estate that is generally owner occupied (“Seasoned performing loans”), and (v) loans on investor properties that conform to the standards for purchase by a federally chartered corporation, such as the Federal National Mortgage Association (“Fannie Mae”) or the Federal Home Loan Mortgage Corporation (“Freddie Mac”) (“Agency eligible investor loans”). Purchased Performing Loans are initially recorded at their purchase price (or amount funded for originated loans). Interest income on Purchased Performing Loans acquired at par is accrued based on each loan’s current interest bearing balance and current interest rate, net of related servicing costs. Interest income on such loans acquired at a premium/discount to par is recorded each period based on the contractual coupon net of any amortization of premium or accretion of discount, adjusted for actual prepayment activity. For loans acquired with related servicing rights retained by the seller, interest income is reported net of related serving costs. For Purchased Performing Loans acquired prior to the second quarter of 2021 and where the fair value option was not elected, an allowance for credit losses is recorded at acquisition, and maintained on an ongoing basis, for all losses expected over the life of the respective loan. Any required credit loss allowance would reduce the net carrying value of the loan with a corresponding charge to earnings, and may increase or decrease over time. Significant judgments are required in determining any allowance for credit loss, including assumptions regarding the loan cash flows expected to be collected, the value of the underlying collateral and the ability of the Company to collect on any other forms of security, such as a personal guaranty provided either by the borrower or an affiliate of the borrower. Income recognition is suspended, and interest accruals are reversed against income, for loans at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of income and principal becomes doubtful (i.e., such loans are placed on nonaccrual status). For nonaccrual loans, interest income is recorded under the cash basis method as interest payments are received. Interest accruals are resumed when the loan becomes contractually current. A loan is written off when it is no longer realizable and/or it is legally discharged. Modified loans are considered “troubled debt restructurings” if the Company grants a concession to a borrower who is experiencing financial difficulty (including the interpretation of this definition set forth in OCC Bulletin 2020-35). Charge-offs to the allowance for loan losses occur when losses are confirmed through the receipt of cash or other consideration from the completion of a sale; when a modification or restructuring takes place in which we grant a concession to a borrower or agree to a discount in full or partial satisfaction of the loan; when we take ownership and control of the underlying collateral in full satisfaction of the loan; when loans are reclassified as other investments; or when significant collection efforts have ceased and it is highly likely that a loss has been realized. The aggregate allowance for credit losses is equal to the sum of the losses expected over the life of each respective loan. Expected losses are generally calculated based on the estimated probability of default and loss severity of loans in the portfolio, which involves projecting each loan’s expected cash flows based on their contractual terms, expected prepayments, and estimated default and loss severity rates. The results were not discounted. The default and severity rates were estimated based on the following steps: (i) obtained the Company’s historical experience through an entire economic cycle for each loan type or, to the extent the Company did not have sufficient historical loss experience for a given loan type, publicly available data derived from the historical loss experience of certain banks, which data the Company believes is generally representative of its portfolio, (ii) obtained historical economic data (U.S. unemployment rates and home price appreciation) over the same period, and (iii) estimated default and severity rates during three distinct future periods based on historical default and severity rates during periods when economic conditions similar to those forecasted were experienced. The default and severity rates were applied to the estimated amount of loans outstanding during each future period, based on contractual terms and expected prepayments. Expected prepayments are estimated based on historical experience and current and expected future economic conditions, including market interest rates. The three periods were as follows: (i) a one-year forecast of economic conditions based on U.S. unemployment rates and home price appreciation, followed by (ii) a two-year “reversion” period during which economic conditions (U.S. unemployment rates and home price appreciation) are projected to revert to historical averages on a straight line basis, followed by (iii) the remaining life of each loan, during which period economic conditions (U.S. unemployment rates and home price appreciation) are projected to equal historical averages. In addition, a liability is established (and recorded in Other Liabilities) each period using a similar methodology for committed but undrawn loan amounts. The Company forecasts future economic conditions based on forecasts provided by an external preparer of economic forecasts, as well as its own knowledge of the market and its portfolio. The Company generally considers multiple scenarios and selects the one that it believes results in the most reasonable estimate of expected losses. The Company may apply qualitative adjustments to these results as further described in Note 3. For certain loans where foreclosure has been deemed to be probable, loss estimates are based on whether the value of the underlying collateral is sufficient to recover the carrying value of the loan. This methodology has not changed from the calculation of the allowance for credit losses on January 1, 2021. Purchased Credit Deteriorated Loans The Company has elected to account for these loans as credit deteriorated as they have experienced a more-than-insignificant deterioration in credit quality since origination and were acquired at discounted prices that reflect, in part, the impaired credit history of the borrower. Substantially all of these loans have previously experienced payment delinquencies and the amount owed may exceed the value of the property pledged as collateral. Consequently, these loans generally have a higher likelihood of default than newly originated mortgage loans with loan-to-value ratios (“LTVs”) of 80% or less to creditworthy borrowers. The Company believes that amounts paid to acquire these loans represent fair market value at the date of acquisition. Loans considered credit deteriorated are initially recorded at the purchase price on a net basis, after establishing an initial allowance for credit losses (their initial cost basis is equal to their purchase price plus the initial allowance for credit losses). Subsequent to acquisition, the gross recorded amount for these loans reflects the initial cost basis, plus accretion of interest income, less principal and interest cash flows received. Purchased Credit Deteriorated Loans acquired prior to the second quarter of 2021, or where the fair value option was not otherwise elected, are presented on the Company’s consolidated balance sheets at carrying value, which reflects the recorded cost basis reduced by any allowance for credit losses. Interest income on such loans purchased is recorded each period based on the contractual coupon net of amortization of the difference between their cost basis and unpaid principal balance (“UPB”), subject to the Company’s nonaccrual policy. Residential Whole Loans at Fair Value Certain of the Company’s residential whole loans are presented at fair value on its consolidated balance sheets as a result of a fair value election made at the time of acquisition. Prior to the second quarter of 2021, this accounting election was made primarily on Purchased Non-performing Loans. Starting in the second quarter of 2021, the Company made the fair value election on all loan acquisitions, which, to date, have been comprised exclusively of Purchased Performing Loans including loans originated by Lima One since its consolidation. The Company generally considers accounting for these loans at fair value to be more reflective of the expected pattern of returns from these loans under current economic conditions. The Company determines the fair value of its residential whole loans held at fair value after considering portfolio valuations obtained from a third-party that specializes in providing valuations of residential mortgage loans and trading activity observed in the market place. Subsequent changes in fair value are reported in current period earnings and presented in Net (loss)/gain on residential whole loans measured at fair value through earnings on the Company’s consolidated statements of operations. Interest income is recorded on these loans based on their yield and is presented as part of interest income in the Company’s consolidated statements of operations. Cash outflows associated with loan-related advances made by the Company on behalf of the borrower are included in the basis of the loan and are reflected in unrealized gains or losses reported each period. Income and costs associated with originating loans on which the fair value option was elected are recorded in other income and expense respectively in the period in which they are earned or incurred. (c) Securities, at Fair Value MSR-Related Assets The Company has investments in financial instruments whose cash flows are considered to be largely dependent on underlying MSRs that either directly or indirectly act as collateral for the investment. These financial instruments, which are referred to as MSR-related assets, are discussed in more detail below. The Company’s MSR-related assets pledged as collateral against repurchase agreements are included in the consolidated balance sheets with the amounts pledged disclosed in Note 6. Purchases and sales of MSR-related assets are recorded on the trade date (see Notes 4, 6, 7 and 14). Term Notes Backed by MSR-Related Collateral The Company has invested in term notes that are issued by special purpose vehicles (“SPV”) that have acquired rights to receive cash flows representing the servicing fees and/or excess servicing spread associated with certain MSRs. The Company considers payment of principal and interest on these term notes to be largely dependent on the cash flows generated by the underlying MSRs as this impacts the cash flows available to the SPV that issued the term notes. Credit risk borne by the holders of the term notes is also mitigated by structural credit support in the form of over-collateralization. Credit support is also provided by a corporate guarantee from the ultimate parent or sponsor of the SPV that is intended to provide for payment of interest and principal to the holders of the term notes should cash flows generated by the underlying MSRs be insufficient. The Company’s term notes backed by MSR-related collateral are treated as “available-for-sale” (“AFS”) securities and reported at fair value on the Company’s consolidated balance sheets with unrealized gains and losses excluded from earnings and reported in Accumulated other comprehensive income/(loss) (“AOCI”), a component of Stockholders’ Equity, subject to impairment and loss allowances. Interest income is recognized on an accrual basis on the Company’s consolidated statements of operations. The Company’s valuation process for such notes is similar to that used for residential mortgage securities and considers a number of observable market data points, including prices obtained from pricing services, brokers and repurchase agreement counterparties, dialogue with market participants, as well as management’s observations of market activity. Other factors taken into consideration include estimated changes in fair value of the related underlying MSR collateral, as applicable, and the financial performance of the ultimate parent or sponsoring entity of the issuer, which has provided a guarantee that is intended to provide for payment of interest and principal to the holders of the term notes should cash flows generated by the related underlying MSR collateral be insufficient. Corporate Loans The Company has made or participated in loans to provide financing to entities that originate residential mortgage loans and own the related MSRs. These corporate loans are generally secured by certain MSRs, as well as certain other unencumbered assets owned by the borrower. Corporate loans are recorded on the Company’s consolidated balance sheets at the drawn amount, on which interest income is recognized on an accrual basis on the Company’s consolidated statements of operations, subject to loss allowances. Commitment fees received on the undrawn amount are deferred and recognized as interest income over the remaining loan term at the time of draw. At the end of the commitment period, any remaining deferred commitment fees are recorded as Other Income on the Company’s consolidated statements of operations. The Company evaluates the recoverability of its corporate loans on a quarterly basis considering various factors, including the current status of the loan, changes in the fair value of the MSRs that secure the loan and the recent financial performance of the borrower. Residential Mortgage Securities Prior to the quarter ended June 30, 2020, the Company had invested in residential mortgage-backed securities (“MBS”) that are issued or guaranteed as to principal and/or interest by a federally chartered corporation, such as Fannie Mae or Freddie Mac, or an agency of the U.S. Government, such as the Government National Mortgage Association (“Ginnie Mae”) (collectively, “Agency MBS”), and residential MBS that are not guaranteed by any agency of the U.S. Government or any federally chartered corporation (“Non-Agency MBS”). The Company disposed of its investments in Agency MBS during 2020 and disposed of its remaining investments in Non-Agency MBS during the second quarter of 2021. In addition, the Company has investments in CRT securities that are issued by or sponsored by Fannie Mae and Freddie Mac. The coupon payments on CRT securities are paid by the issuer and the principal payments received are dependent on the performance of loans in either a reference pool or an actual pool of loans. As the loans in the underlying pool are paid, the principal balance of the CRT securities is paid. As an investor in a CRT security, the Company may incur a principal loss if the performance of the actual or reference pool loans results in either an actual or calculated loss that exceeds the credit enhancement of the security owned by the Company. Designation Securities that the Company generally intends to hold until maturity, but that it may sell from time to time as part of the overall management of its business, are designated as AFS. Such securities are carried at their fair value with unrealized gains and losses excluded from earnings (except when an allowance for loan losses is recognized, as discussed below) and reported in AOCI, a component of Stockholders’ Equity. Upon the sale of an AFS security, any unrealized gain or loss is reclassified out of AOCI to earnings as a realized gain or loss using the specific identification method. The Company had elected the fair value option for certain of its previously held Agency MBS that it did not intend to hold to maturity. These securities were carried at their fair value with changes in fair value included in earnings for the period and reported in Other Income, net on the Company’s consolidated statements of operations. In addition, the Company has elected the fair value option for certain of its CRT securities as it considers this method of accounting to more appropriately reflect the risk-sharing structure of these securities. Such securities are carried at their fair value with changes in fair value included in earnings for the period and reported in Other Income, net on the Company’s consolidated statements of operations. Revenue Recognition, Premium Amortization and Discount Accretion Interest income on securities is accrued based on their outstanding principal balance and their contractual terms. Premiums and discounts associated with Agency MBS and Non-Agency MBS assessed as high credit quality at the time of purchase are amortized into interest income over the life of such securities using the effective yield method. Adjustments to premium amortization are made for actual prepayment activity. Determination of Fair Value for Residential Mortgage Securities In determining the fair value of the Company’s residential mortgage securities, management considers a number of observable market data points, including prices obtained from pricing services, brokers and repurchase agreement counterparties, dialogue with market participants, as well as management’s observations of market activity (see Note 14). Allowance for credit losses When the fair value of an AFS security is less than its amortized cost at the balance sheet date, the security is considered impaired. The Company assesses its impaired securities, as well as securities for which a credit loss allowance had been previously recorded, on at least a quarterly basis and determines whether any changes to the allowance for credit losses are required. If the Company intends to sell an impaired security, or it is more likely than not that it will be required to sell the impaired security before its anticipated recovery, then the Company must recognize a write-down through charges to earnings equal to the entire difference between the investment’s amortized cost and its fair value at the balance sheet date. If the Company does not expect to sell an impaired security, only the portion of the impairment related to credit losses is recognized through a loss allowance charged to earnings with the remainder recognized through AOCI on the Company’s consolidated balance sheets. Impairments recognized through other comprehensive income/(loss) (“OCI”) do not impact earnings. Credit loss allowances are subject to reversal through earnings resulting from improvements in expected cash flows. The determination as to whether to record (or reverse) a credit loss allowance is subjective, as such determinations are based on factual information available at the time of assessment as well as the Company’s estimates of future performance and cash flow projections. As a result, the timing and amount of losses constitute material estimates that are susceptible to significant change (see Note 4). Balance Sheet Presentation The Company’s residential mortgage securities pledged as collateral against financing agreements and interest rate swap agreements (“Swaps”) are included on the consolidated balance sheets with the fair value of the securities pledged disclosed in Note 6. Purchases and sales of securities are recorded on the trade date. (d) Cash and Cash Equivalents Cash and cash equivalents include cash on deposit with financial institutions and investments in money market funds, all of which have original maturities of three months or less. Cash and cash equivalents may also include cash pledged as collateral to the Company by its financing counterparties as a result of reverse margin calls (i.e., margin calls made by the Company). The Company did not hold any cash pledged by its counterparties at September 30, 2021 and December 31, 2020. At September 30, 2021 and December 31, 2020, the Company had cash and cash equivalents of $526.2 million and $814.4 million, respectively. At September 30, 2021, the Company had $461.7 million of investments in overnight money market funds, which are not bank deposits and are not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. As of December 31, 2020, the Company had $752.4 million worth of investments in overnight money market funds. In addition, deposits in FDIC insured accounts generally exceed insured limits (see Notes 7 and 14). (e) Restricted Cash Restricted cash primarily represents the Company’s cash collections held in connection with certain of the Company’s financing agreements that are not available to the Company for general corporate purposes. Restricted cash may be applied against amounts due to financing counterparties, or may be returned to the Company when the related collateral requirements are exceeded or at the maturity of financing agreements. The Company had aggregate restricted cash held in connection with its financing agreements of $55.5 million and $7.2 million at September 30, 2021 and December 31, 2020, respectively (see Notes 5(c), 6, 7 and 14). (f) Goodwill & Intangible Assets At September 30, 2021, the Company had goodwill of $61.6 million, which represents the excess of the fair value of consideration paid over the fair value of net assets acquired in connection with the acquisition of Lima One, see Note 16, and other intangible assets of $24.7 million (net of amortization) primarily comprised of customer relationships, non-competition agreements, trademarks and trade names, and internally developed software recognized as part of the acquisition of Lima One. The intangible assets are amortized over their expected useful lives, which range from one (g) Real Estate Owned (“REO”) REO represents real estate acquired by the Company, including through foreclosure, deed in lieu of foreclosure, or purchased in connection with the acquisition of residential whole loans. REO acquired through foreclosure or deed in lieu of foreclosure is initially recorded at fair value less estimated selling costs. REO acquired in connection with the acquisition of residential whole loans is initially recorded at its purchase price. Subsequent to acquisition, REO is reported, at each reporting date, at the lower of the current carrying amount or fair value less estimated selling costs and for presentation purposes is included in Other assets on the Company’s consolidated balance sheets. Changes in fair value that result in an adjustment to the reported amount of an REO property that has a fair value at or below its carrying amount are reported in Other Income, net on the Company’s consolidated statements of operations. The Company has acquired certain properties that it holds for investment purposes, including rentals to third parties. These properties are held at their historical basis less depreciation, and are subject to impairment. Related rental income and expenses are recorded in Other Income, net (see Note 5). (h) Leases and Depreciation Leases The Company records its operating lease liabilities and operating lease right-of-use assets on its consolidated balance sheets. The operating lease liabilities are equal to the present value of the remaining fixed lease payments (excluding real estate tax and operating expense escalations) discounted at the Company’s estimated incremental borrowing rate at the date of lease commencement, and the operating lease right-of-use assets are equal to the operating lease liabilities adjusted for lease incentives and initial direct costs. As lease payments are made, the operating lease liabilities are reduced to the present value of the remaining lease payments and the operating lease right-of-use assets are reduced by the difference between the lease expense (straight-lined over the lease term) and the theoretical interest expense amount (calculated using the incremental borrowing rate at the date of lease commencement). See Notes 5 and 10 for further discussion on leases. Leasehold Improvements, Real estate and Other Depreciable Assets Depreciation is computed on the straight-line method over the estimated useful life of the related assets

Residential Whole Loans

Residential Whole Loans	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Residential Whole Loans	Residential Whole Loans Included on the Company’s consolidated balance sheets at September 30, 2021 and December 31, 2020 are approximately $7.1 billion and $5.3 billion, respectively, of residential whole loans arising from the Company’s interests in certain trusts established to acquire the loans and certain entities established in connection with its loan securitization transactions. The Company has assessed that these entities are required to be consolidated for financial reporting purposes. Starting in the second quarter of 2021, the Company elected the fair value option for all loan acquisitions, including loans originated by Lima One subsequent to its acquisition by the Company. Prior to the second quarter of 2021, the fair value option was typically elected only for Purchased Non-performing Loans. The following table presents the components of the Company’s Residential whole loans, and the accounting model designated at September 30, 2021 and December 31, 2020: Held at Carrying Value Held at Fair Value Total (Dollars In Thousands) September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Purchased Performing Loans: Non-QM loans $ 1,683,025 $ 2,357,185 $ 1,152,547 $ — $ 2,835,572 $ 2,357,185 Rehabilitation loans 294,622 581,801 301,602 — 596,224 581,801 Single-family rental loans 368,927 446,374 372,135 — 741,062 446,374 Seasoned performing loans 110,162 136,264 — — 110,162 136,264 Agency eligible investor loans — — 1,126,477 — 1,126,477 — Total Purchased Performing Loans $ 2,456,736 $ 3,521,624 $ 2,952,761 $ — $ 5,409,497 $ 3,521,624 Purchased Credit Deteriorated Loans $ 575,230 $ 673,708 $ — $ — $ 575,230 $ 673,708 Allowance for Credit Losses $ (44,102) $ (86,833) $ — $ — $ (44,102) $ (86,833) Purchased Non-Performing Loans $ — $ — $ 1,140,837 $ 1,216,902 $ 1,140,837 $ 1,216,902 Total Residential Whole Loans $ 2,987,864 $ 4,108,499 $ 4,093,598 $ 1,216,902 $ 7,081,462 $ 5,325,401 Number of loans 10,361 13,112 12,307 5,622 22,668 18,734 The following table presents additional information regarding the Company’s Residential whole loans at September 30, 2021 and December 31, 2020: September 30, 2021 Fair Value / Carrying Value Unpaid Principal Balance (“UPB”) Weighted Average Coupon (1) Weighted Average Term to Maturity (Months) Weighted Average LTV Ratio (2) Weighted Average Original FICO (3) Aging by UPB Past Due Days (Dollars In Thousands) Current 30-59 60-89 90+ Purchased Performing Loans: Non-QM loans $ 2,825,883 $ 2,737,998 5.36 % 350 64 % 725 $ 2,526,620 $ 65,991 $ 18,902 $ 126,485 Rehabilitation loans 587,539 594,366 7.27 8 66 726 469,292 17,939 3,432 103,703 Single-family rental loans 739,428 717,552 5.69 330 70 731 690,822 1,834 1,033 23,863 Seasoned performing loans 110,112 120,444 2.86 164 38 722 109,331 1,095 616 9,402 Agency eligible investor loans (4) 963,462 936,748 3.40 356 62 767 933,633 2,818 297 — Total Purchased Performing Loans 5,226,424 $ 5,107,108 5.21 % 304 Purchased Credit Deteriorated Loans $ 551,186 $ 674,367 4.55 % 284 69 % N/A 481,330 50,991 18,857 123,189 Purchased Non-Performing Loans $ 1,140,837 $ 1,137,666 4.88 % 285 74 % N/A $ 517,924 $ 94,139 $ 39,605 $ 485,998 Residential whole loans, total or weighted average $ 6,918,447 $ 6,919,141 5.10 % 299 December 31, 2020 Fair Value / Carrying Value Unpaid Principal Balance (“UPB”) Weighted Average Coupon (1) Weighted Average Term to Maturity (Months) Weighted Average LTV Ratio (2) Weighted Average Original FICO (3) Aging by UPB Past Due Days (Dollars In Thousands) Current 30-59 60-89 90+ Purchased Performing Loans: Non-QM loans $ 2,336,117 $ 2,294,086 5.84 % 351 64 % 712 $ 2,042,405 $ 71,303 $ 35,697 $ 144,681 Rehabilitation loans 563,430 581,801 7.29 3 63 719 390,706 29,315 25,433 136,347 Single-family rental loans 442,456 442,208 6.32 324 70 730 411,377 6,691 3,907 20,233 Seasoned performing loans 136,157 149,004 3.30 171 40 723 136,778 2,248 1,155 8,823 Total Purchased Performing Loans 3,478,160 $ 3,467,099 6.04 % 281 Purchased Credit Deteriorated Loans 630,339 $ 782,319 4.46 % 287 76 N/A 544,803 65,791 26,697 145,028 Purchased Non-Performing Loans 1,216,902 $ 1,282,093 4.87 % 290 80 N/A 497,299 104,993 54,180 625,621 Residential whole loans, total or weighted average $ 5,325,401 $ 5,531,511 5.54 % 284 (1) Weighted average is calculated based on the interest bearing principal balance of each loan within the related category. For loans acquired with servicing rights released by the seller, interest rates included in the calculation do not reflect loan servicing fees. For loans acquired with servicing rights retained by the seller, interest rates included in the calculation are net of servicing fees. (2) LTV represents the ratio of the total unpaid principal balance of the loan to the estimated value of the collateral securing the related loan as of the most recent date available, which may be the origination date. For Rehabilitation loans, the LTV presented is the ratio of the maximum unpaid principal balance of the loan, including unfunded commitments, to the estimated “after repaired” value of the collateral securing the related loan, where available. For certain Rehabilitation loans, totaling $142.7 million and $189.9 million at September 30, 2021 and December 31, 2020, respectively, an after repaired valuation was not obtained and the loan was underwritten based on an “as is” valuation. The weighted average LTV of these loans based on the current unpaid principal balance and the valuation obtained during underwriting, is 70% and 69% at September 30, 2021 and December 31, 2020, respectively. Excluded from the calculation of weighted average LTV are certain low value loans secured by vacant lots, for which the LTV ratio is not meaningful. (3) Excludes loans for which no Fair Isaac Corporation (“FICO”) score is available. (4) Excluded from the table above are approximately $163.0 million of Residential whole loans, at fair value for which the closing of the purchase transaction had not occurred as of September 30, 2021. No Residential whole loans were sold during the three and nine months ended September 30, 2021. During the nine months ended September 30, 2020, $1.8 billion of Non-QM loans were sold, realizing losses of $273.0 million. During the nine months ended September 30, 2020, Purchased Non-performing loans with an aggregate unpaid principal balance of $24.1 million were sold, realizing net losses of $800,000. Allowance for Credit Losses The following table presents a roll-forward of the allowance for credit losses on the Company’s Residential Whole Loans, at Carrying Value: Nine Months Ended September 30, 2021 (Dollars In Thousands) Non-QM Loans Rehabilitation Loans (1)(2) Single-family Rental Loans Seasoned Performing Loans Purchased Credit Deteriorated Loans (3) Totals Allowance for credit losses at December 31, 2020 $ 21,068 $ 18,371 $ 3,918 $ 107 $ 43,369 $ 86,833 Current provision (6,523) (3,700) (1,172) (41) (10,936) (22,372) Write-offs — (1,003) — — (214) (1,217) Allowance for credit losses at March 31, 2021 $ 14,545 $ 13,668 $ 2,746 $ 66 $ 32,219 $ 63,244 Current provision/(reversal) (2,416) (1,809) (386) (9) (3,963) (8,583) Write-offs (37) (255) — — (108) (400) Allowance for credit losses at June 30, 2021 $ 12,092 $ 11,604 $ 2,360 $ 57 $ 28,148 $ 54,261 Current provision/(reversal) (2,403) (2,526) (670) (7) (4,020) (9,626) Write-offs — (393) (56) — (84) (533) Allowance for credit losses at September 30, 2021 $ 9,689 $ 8,685 $ 1,634 $ 50 $ 24,044 $ 44,102 Nine Months Ended September 30, 2020 (Dollars In Thousands) Non-QM Loans Rehabilitation Loans (1)(2) Single-family Rental Loans Seasoned Performing Loans Purchased Credit Deteriorated Loans (3) Totals Allowance for credit losses at December 31, 2019 $ 388 $ 2,331 $ 62 $ — $ 244 $ 3,025 Transition adjustment on adoption of ASU 2016-13 (4) 6,904 517 754 19 62,361 70,555 Current provision 26,358 33,213 6,615 230 8,481 74,897 Write-offs — (428) — — (219) (647) Valuation adjustment on loans held for sale 70,181 — — — — 70,181 Allowance for credit and valuation losses at March 31, 2020 $ 103,831 $ 35,633 $ 7,431 $ 249 $ 70,867 $ 218,011 Current provision/(reversal) (2,297) (5,213) (500) (25) (2,579) (10,614) Write-offs — (420) — — (207) (627) Valuation adjustment on loans held for sale (70,181) — — — — (70,181) Allowance for credit losses at June 30, 2020 $ 31,353 $ 30,000 $ 6,931 $ 224 $ 68,081 $ 136,589 Current provision/(reversal) (4,568) (7,140) (1,906) (74) (16,374) (30,062) Write-offs (32) (227) — — (22) (281) Allowance for credit losses at September 30, 2020 $ 26,753 $ 22,633 $ 5,025 $ 150 $ 51,685 $ 106,246 (1) In connection with purchased Rehabilitation loans at carrying value, the Company had unfunded commitments of $29.2 million and $73.2 million as of September 30, 2021 and 2020, respectively, with an allowance for credit losses of $355,000 and $1.6 million at September 30, 2021 and 2020, respectively. Such allowance is included in “Other liabilities” in the Company’s consolidated balance sheets (see Note 9). (2) Includes $94.9 million and $143.4 million of loans that were assessed for credit losses based on a collateral dependent methodology as of September 30, 2021 and 2020, respectively. (3) Includes $57.4 million and $72.7 million of loans that were assessed for credit losses based on a collateral dependent methodology as of September 30, 2021 and 2020, respectively. (4) Of the $70.6 million of reserves recorded on adoption of ASU 2016-13, $8.3 million was recorded as an adjustment to stockholders’ equity and $62.4 million was recorded as a “gross up” of the amortized cost basis of Purchased Credit Deteriorated Loans. The Company adopted ASU 2016-13 (“CECL”) on January 1, 2020 (see Note 2). The anticipated impact of the COVID-19 pandemic on expected economic conditions, including forecasted unemployment, home price appreciation, and prepayment rates, for the short to medium term resulted in significantly increased estimates of credit losses recorded under CECL for the first quarter of 2020 for residential whole loans held at carrying value. Since the end of the first quarter of 2020, primarily as a result of generally more stable markets and an ongoing economic recovery, the Company has made subsequent revisions to certain macro-economic assumptions, including its estimates related to future rates of unemployment and home price appreciation, and has made adjustments to the quantitative model outputs for relevant qualitative factors. The net impact of these assumption revisions and qualitative adjustments, as well as reductions in balances subject to CECL, has resulted in a reversal of a portion of the allowance for loan loss since the end of the first quarter of 2020. The qualitative adjustments, which have the effect of increasing expected loss estimates, were determined based on a variety of factors, including differences between the Company’s loan portfolio and the loan portfolios represented by data available in regulatory filings of certain banks that are considered to have similar loan portfolios (available proxy data), and differences between current (and expected future) market conditions in comparison to market conditions that occurred in historical periods. Such differences include uncertainty with respect to the ongoing impact of the pandemic, the speed of vaccine deployment and time period for a significant portion of society to be vaccinated, the extent and timing of government stimulus efforts and heightened political uncertainty. The Company’s estimates of credit losses reflect the Company’s expectation that full recovery to pre-pandemic economic conditions will take an extended period, resulting in increased delinquencies and defaults during this period compared to historical periods. Estimates of credit losses under CECL are highly sensitive to changes in assumptions and current economic conditions have increased the difficulty of accurately forecasting future conditions. The amortized cost basis of Purchased Performing Loans on nonaccrual status as of September 30, 2021 and December 31, 2020 was $275.9 million and $373.3 million, respectively. The amortized cost basis of Purchased Credit Deteriorated Loans on nonaccrual status as of September 30, 2021 and December 31, 2020 was $113.0 million and $151.4 million, respectively. The fair value of Purchased Non-performing Loans on nonaccrual status as of September 30, 2021 and December 31, 2020 was $624.9 million and $730.9 million, respectively. At September 30, 2021 and December 31, 2020, there were approximately $122.3 million and $130.7 million, respectively, of loans on nonaccrual status that did not have an associated allowance for credit losses because they were determined to be collateral dependent and the estimated fair value of the related collateral exceeded the carrying value of each loan, respectively. In periods prior to the adoption of CECL, an allowance for loan losses was recorded when, based on current information and events, it was probable that the Company would be unable to collect all amounts due under the existing contractual terms of the loan agreement. Any required loan loss allowance would reduce the carrying value of the loan with a corresponding charge to earnings. Significant judgments were required in determining any allowance for loan loss, including assumptions regarding the loan cash flows expected to be collected, the value of the underlying collateral and the ability of the Company to collect on any other forms of security, such as a personal guaranty provided either by the borrower or an affiliate of the borrower. The following table presents certain additional credit-related information regarding our Residential whole loans, at Carrying Value: Amortized Cost Basis by Origination Year and LTV Bands (Dollars In Thousands) 2021 2020 2019 2018 2017 Prior Total Non-QM loans LTV <= 80% (1) $ 71,860 $ 321,875 $ 770,456 $ 407,943 $ 40,381 $ 4,228 $ 1,616,743 LTV > 80% (1) 4,191 28,369 15,709 14,686 3,177 150 66,282 Total Non-QM loans $ 76,051 $ 350,244 $ 786,165 $ 422,629 $ 43,558 $ 4,378 $ 1,683,025 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ — $ 37 $ — $ — $ 37 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ — $ 37 $ — $ — $ 37 Rehabilitation loans LTV <= 80% (1) $ 13,717 $ 27,910 $ 214,618 $ 31,228 $ 3,427 $ — $ 290,900 LTV > 80% (1) — — 1,226 796 1,700 — 3,722 Total Rehabilitation loans $ 13,717 $ 27,910 $ 215,844 $ 32,024 $ 5,127 $ — $ 294,622 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ 1,059 $ 468 $ 123 $ — $ 1,650 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ 1,059 $ 468 $ 123 $ — $ 1,650 Single family rental loans LTV <= 80% (1) $ 15,502 $ 37,089 $ 208,010 $ 91,783 $ 10,537 $ — $ 362,921 LTV > 80% (1) — 513 5,406 87 — — 6,006 Total Single family rental loans $ 15,502 $ 37,602 $ 213,416 $ 91,870 $ 10,537 $ — $ 368,927 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ 56 $ — $ — $ — $ 56 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ 56 $ — $ — $ — $ 56 Seasoned performing loans LTV <= 80% (1) $ — $ — $ — $ — $ — $ 105,348 $ 105,348 LTV > 80% (1) — — — — — 4,814 4,814 Total Seasoned performing loans $ — $ — $ — $ — $ — $ 110,162 $ 110,162 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ — $ — $ — $ — $ — Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ — $ — $ — $ — $ — Purchased credit deteriorated loans LTV <= 80% (1) $ — $ — $ — $ — $ 621 $ 421,264 $ 421,885 LTV > 80% (1) — — — — — 153,345 153,345 Total Purchased credit deteriorated loans $ — $ — $ — $ — $ 621 $ 574,609 $ 575,230 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ — $ — $ — $ 406 $ 406 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ — $ — $ — $ 406 $ 406 Total LTV <= 80% (1) $ 101,079 $ 386,874 $ 1,193,084 $ 530,954 $ 54,966 $ 530,840 $ 2,797,797 Total LTV > 80% (1) 4,191 28,882 22,341 15,569 4,877 158,309 234,169 Total residential whole loans, at carrying value $ 105,270 $ 415,756 $ 1,215,425 $ 546,523 $ 59,843 $ 689,149 $ 3,031,966 Total Gross write-offs $ — $ — $ 1,115 $ 505 $ 123 $ 406 $ 2,149 Total Recoveries — — — — — — — Total Net write-offs $ — $ — $ 1,115 $ 505 $ 123 $ 406 $ 2,149 (1) LTV represents the ratio of the total unpaid principal balance of the loan to the estimated value of the collateral securing the related loan as of the most recent date available, which may be the origination date. For Rehabilitation loans, the LTV presented is the ratio of the maximum unpaid principal balance of the loan, including unfunded commitments, to the estimated “after repaired” value of the collateral securing the related loan, where available. For certain Rehabilitation loans, totaling $142.7 million at September 30, 2021, an after repaired valuation was not obtained and the loan was underwritten based on an “as is” valuation. The weighted average LTV of these loans based on the current unpaid principal balance and the valuation obtained during underwriting is 70% at September 30, 2021. Certain low value loans secured by vacant lots are categorized as LTV > 80%. The following tables present certain information regarding the LTVs of the Company’s Residential whole loans that are 90 days or more delinquent: September 30, 2021 (Dollars In Thousands) Carrying Value / Fair Value UPB LTV (1) Residential whole loans, at carrying value Purchased credit deteriorated loans $ 100,905 $ 123,189 79.8 % Non-QM loans $ 121,741 $ 119,572 64.5 % Rehabilitation loans $ 101,012 $ 101,012 68.6 % Single-family rental loans $ 22,767 $ 22,771 73.6 % Seasoned performing loans $ 8,671 $ 9,402 51.3 % Total Residential whole loans, at carrying value $ 355,096 $ 375,946 Residential whole loans, at fair value Purchased non-performing loans $ 484,510 $ 485,998 81.2 % Purchased performing loans $ 10,391 $ 10,696 62.7 % Total Residential whole loans, at fair value $ 494,901 $ 496,694 December 31, 2020 (Dollars In Thousands) Carrying Value / Fair Value UPB LTV (1) Residential whole loans, at carrying value Purchased credit deteriorated loans $ 119,621 $ 145,028 86.7 % Non-QM loans $ 148,387 $ 144,681 65.9 % Rehabilitation loans $ 136,347 $ 136,347 65.8 % Single-family rental loans $ 20,388 $ 20,233 72.7 % Seasoned performing loans $ 8,031 $ 8,823 55.1 % Total Residential whole loans, at carrying value $ 432,774 $ 455,112 Residential whole loans, at fair value Purchased non-performing loans $ 571,729 $ 625,621 86.8 % Purchased performing loans $ — $ — — % Total Residential whole loans, at fair value $ 571,729 $ 625,621 (1) LTV represents the ratio of the total unpaid principal balance of the loan to the estimated value of the collateral securing the related loan as of the most recent date available, which may be the origination date. For Rehabilitation loans, the LTV presented is the ratio of the maximum unpaid principal balance of the loan, including unfunded commitments, to the estimated “after repaired” value of the collateral securing the related loan, where available. For certain Rehabilitation loans, an after repaired valuation was not obtained and the loan was underwritten based on an “as is” valuation. Excluded from the calculation of weighted average LTV are certain low value loans secured by vacant lots, for which the LTV ratio is not meaningful. The following tables present the components of interest income on the Company’s Residential whole loans for the three and nine months ended September 30, 2021 and 2020: Held at Carrying Value Held at Fair Value Total Three Months Ended Three Months Ended Three Months Ended (In Thousands) 2021 2020 2021 2020 2021 2020 Purchased Performing Loans: Non-QM loans $ 17,437 $ 25,884 $ 6,454 $ — $ 23,891 $ 25,884 Rehabilitation loans 5,808 10,863 4,110 — 9,918 10,863 Single-family rental loans 6,074 6,917 3,423 — 9,497 6,917 Seasoned performing loans 1,728 1,945 — — 1,728 1,945 Agency eligible investor loans — — 3,360 — 3,360 — Total Purchased Performing Loans $ 31,047 $ 45,609 $ 17,347 $ — $ 48,394 $ 45,609 Purchased Credit Deteriorated Loans $ 10,504 $ 8,784 $ — $ — $ 10,504 $ 8,784 Purchased Non-Performing Loans $ — $ — $ 20,704 $ 16,555 $ 20,704 $ 16,555 Total Residential Whole Loans $ 41,551 $ 54,393 $ 38,051 $ 16,555 $ 79,602 $ 70,948 Held at Carrying Value Held at Fair Value Total Nine Months Ended Nine Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 2021 2020 Purchased Performing Loans: Non-QM loans $ 59,789 $ 112,212 $ 8,258 $ — $ 68,047 $ 112,212 Rehabilitation loans 19,429 39,502 4,485 — 23,914 39,502 Single-family rental loans 19,594 21,528 3,890 — 23,484 21,528 Seasoned performing loans 5,260 6,799 — — 5,260 6,799 Agency eligible investor loans — — 3,622 — 3,622 — Total Purchased Performing Loans $ 104,072 $ 180,041 $ 20,255 $ — $ 124,327 $ 180,041 Purchased Credit Deteriorated Loans $ 30,097 $ 27,265 $ — $ — $ 30,097 $ 27,265 Purchased Non-Performing Loans $ — $ — $ 58,732 $ 54,513 $ 58,732 $ 54,513 Total Residential Whole Loans $ 134,169 $ 207,306 $ 78,987 $ 54,513 $ 213,156 $ 261,819 The following table presents the components of Net gain/(loss) on residential whole loans measured at fair value through earnings for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 Net unrealized gains/(losses) $ 20,494 $ 58,863 $ 58,807 $ (13,683) Other Income (1) 1,321 1,453 518 3,601 Total $ 21,815 $ 60,316 $ 59,325 $ (10,082)

Securities, at Fair Value

Securities, at Fair Value	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Securities, at Fair Value	Securities, at Fair Value MSR-Related Assets Term Notes Backed by MSR-Related Collateral At September 30, 2021 and December 31, 2020, the Company had $177.5 million and $239.0 million, respectively, of term notes issued by SPVs that have acquired rights to receive cash flows representing the servicing fees and/or excess servicing spread associated with certain MSRs. Payment of principal and interest on these term notes is considered to be largely dependent on cash flows generated by the underlying MSRs, as this impacts the cash flows available to the SPV that issued the term notes. At September 30, 2021, these term notes had an amortized cost of $135.1 million , gross unrealized gains of approximately $42.5 million , a weighted average yield of 12.6% and a weighted average term to maturity of 6.1 years . At December 31, 2020, the term notes had an amortized cost of $184.9 million, gross unrealized gains of approximately $54.0 million, a weighted average yield of 12.3% and a weighted average term to maturity of 8.7 years. During the nine months ended September 30, 2020, the Company sold certain term notes for $711.7 million, realizing gains of $28.7 million. During the three months ended March 31, 2020, the Company recognized an impairment loss related to its term notes of $280.8 million based on its intent to sell, or the likelihood it will be required to sell, such notes. CRT Securities CRT securities are debt obligations issued by or sponsored by Fannie Mae and Freddie Mac. The coupon payments on CRT securities are paid by the issuer and the principal payments received are dependent on the performance of loans in either a reference pool or an actual pool of loans. As an investor in a CRT security, the Company may incur a principal loss if the performance of the actual or reference pool loans results in either an actual or calculated loss that exceeds the credit enhancement of the security owned by the Company. The Company assesses the credit risk associated with its investments in CRT securities by assessing the current and expected future performance of the associated loan pool. The Company pledges a portion of its CRT securities as collateral against its borrowings under repurchase agreements (see Note 7). Agency and Non-Agency MBS MBS investments held during the year ended December 31, 2020 and in prior periods included Agency MBS and Non-Agency MBS which include MBS issued prior to 2008 (“Legacy Non-Agency MBS”). These MBS are secured by: (i) hybrid mortgages (“Hybrids”), which have interest rates that are fixed for a specified period of time and, thereafter, generally adjust annually to an increment over a specified interest rate index; (ii) adjustable-rate mortgages (“ARMs”), which have interest rates that reset annually or more frequently (collectively, “ARM-MBS”); and (iii) 15 and 30 year fixed-rate mortgages for Agency MBS and, for Non-Agency MBS, 30-year and longer-term fixed rate mortgages. In addition, until the second quarter of 2021 the Company’s MBS were also comprised of MBS backed by securitized re-performing/non-performing loans (“RPL/NPL MBS”), where the cash flows of the bond may not reflect the contractual cash flows of the underlying collateral. The Company’s RPL/NPL MBS were generally structured with a contractual coupon step-up feature where the coupon increases from 300 - 400 basis points at 36 - 48 months from issuance or sooner. The Company pledges a significant portion of its MBS as collateral against its borrowings under repurchase agreements (see Note 7). Agency MBS: Agency MBS are guaranteed as to principal and/or interest by a federally chartered corporation, such as Fannie Mae or Freddie Mac, or an agency of the U.S. Government, such as Ginnie Mae. The payment of principal and/or interest on Ginnie Mae MBS is explicitly backed by the full faith and credit of the U.S. Government. Since the third quarter of 2008, Fannie Mae and Freddie Mac have been under the conservatorship of the Federal Housing Finance Agency, which significantly strengthened the backing for these government-sponsored entities. The Company sold its remaining holdings of Agency MBS during the quarter ended June 30, 2020. Non-Agency MBS: The Company’s Non-Agency MBS are primarily secured by pools of residential mortgages, which are not guaranteed by an agency of the U.S. Government or any federally chartered corporation. Credit risk associated with Non-Agency MBS is regularly assessed as new information regarding the underlying collateral becomes available and based on updated estimates of cash flows generated by the underlying collateral. During 2020, the Company sold all of its holdings of Legacy Non-Agency MBS and substantially reduced its holdings of other Non-Agency MBS. Due to issuer redemptions, remaining holdings of Non-Agency MBS were reduced to zero as of June 30, 2021. The following tables present certain information about the Company’s residential mortgage securities at September 30, 2021 and December 31, 2020: September 30, 2021 (In Thousands) Principal/ Current Purchase Accretable Discount Designated as Credit Reserve (1) Gross Amortized Gross Gross Net Fair Total residential mortgage securities (2)(4)(5) $ 102,307 $ 6,163 $ (59) $ (20,768) $ 87,643 $ 17,853 $ (8) $ 17,845 $ 105,488 December 31, 2020 (In Thousands) Principal/ Current Purchase Accretable Discount Designated as Credit Reserve (1) Gross Amortized Gross Gross Net Fair Value Total residential mortgage securities (2)(3)(4)(5) $ 161,878 $ 3,022 $ (8,206) $ (21,437) $ 135,257 $ 26,926 $ (1,183) $ 25,743 $ 161,000 (1) Discount designated as Credit Reserve is generally not expected to be accreted into interest income. (2) Based on management ’ s current estimates of future principal cash flows expected to be received. (3) Includes RPL/NPL MBS, which at December 31, 2020 had a $55.0 million Principal/Current face, $46.9 million amortized cost and $53.9 million fair value. (4) At December 31, 2020, the Company expected to recover approximately 99% of the then-current face amount of Non-Agency MBS. (5) Amounts disclosed at September 30, 2021 includes CRT securities with a fair value of $68.0 million for which the fair value option has been elected. Such securities had $2.2 million gross unrealized gains and gross unrealized losses of approximately $8,000 at September 30, 2021. Amounts disclosed at December 31, 2020 includes CRT securities with a fair value of $66.2 million for which the fair value option has been elected. Such securities had gross unrealized gains of approximately $551,000 and gross unrealized losses of approximately $322,000 at December 31, 2020. Sales of Residential Mortgage Securities The following table presents information about the Company’s sales of its residential mortgage securities for the three and nine months ended September 30, 2021 and 2020. The Company has no continuing involvement with any of the sold securities. Three Months Ended Three Months Ended (In Thousands) Sales Proceeds Gains/(Losses) Sales Proceeds Gains/(Losses) Agency MBS $ — $ — $ — $ — Non-Agency MBS — — 116 48 CRT Securities — — — — Total $ — $ — $ 116 $ 48 Nine Months Ended Nine Months Ended (In Thousands) Sales Proceeds Gains/(Losses) Sales Proceeds Gains/(Losses) Agency MBS $ — $ — $ 1,500,875 $ (19,291) Non-Agency MBS — — 1,318,958 107,999 CRT Securities — — 243,025 (27,011) Total $ — $ — $ 3,062,858 $ 61,697 Unrealized Losses on Residential Mortgage Securities There were no gross unrealized losses on the Company’s AFS securities at September 30, 2021. The Company did not recognize an allowance for credit losses (or other than temporary impairment in prior year periods) through earnings related to its MBS for the three and nine months ended September 30, 2021. During the three months ended March 31, 2020, the Company recognized an aggregate impairment loss related to its MBS of $63.5 million based on its intent to sell, or the likelihood it will be required to sell, certain securities at such time. The following table presents a roll-forward of the allowance for credit losses on the Company’s Residential mortgage securities and MSR-related assets: Three Months Ended September 30, Nine Months Ended September 30, (Dollars In Thousands) 2021 2020 2021 2020 Allowance for credit losses at beginning of period $ — $ — $ — $ — Current provision: Securities with no prior loss allowance — — — 344,269 Securities with a prior loss allowance — — — — Write-offs, including allowance related to securities the Company intended to sell — — — (344,269) Allowance for credit losses at end of period $ — $ — $ — $ — Impact of AFS Securities on AOCI The following table presents the impact of the Company’s AFS securities on its AOCI for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 AOCI from AFS securities: Unrealized gain on AFS securities at beginning of period $ 66,163 $ 52,889 $ 79,607 $ 392,722 Unrealized (losses)/gains on securities available-for-sale (8,029) 15,082 (21,473) 408,585 Reclassification adjustment for MBS sales included in net income — (60) — (389,127) Reclassification adjustment for impairment included in net income — — — (344,269) Change in AOCI from AFS securities (8,029) 15,022 (21,473) (324,811) Balance at end of period $ 58,134 $ 67,911 $ 58,134 $ 67,911 Interest Income on Securities, at Fair Value The following table presents the components of interest income on the Company’s Securities, at fair value for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Agency MBS Coupon interest $ — $ — $ — $ 14,038 Effective yield adjustment (1) — — — (5,186) Interest income $ — $ — $ — $ 8,852 Legacy Non-Agency MBS Coupon interest $ — $ 42 $ 14 $ 18,222 Effective yield adjustment (2)(3) — 6 670 10,564 Interest income $ — $ 48 $ 684 $ 28,786 RPL/NPL MBS Coupon interest $ — $ 811 $ 373 $ 7,622 Effective yield adjustment (1)(4) — 94 8,136 449 Interest income $ — $ 905 $ 8,509 $ 8,071 CRT securities Coupon interest $ 931 $ 956 $ 2,774 $ 6,063 Effective yield adjustment (2) 1,364 420 3,152 (94) Interest income $ 2,295 $ 1,376 $ 5,926 $ 5,969 MSR-related assets Coupon interest $ 1,595 $ 2,991 $ 6,044 $ 23,332 Effective yield adjustment (1)(2)(5) 6,739 3,250 21,270 6,857 Interest income $ 8,334 $ 6,241 $ 27,314 $ 30,189 (1) Includes amortization of premium paid net of accretion of purchase discount. For Agency MBS, RPL/NPL MBS and the corporate loan secured by MSRs, interest income is recorded at an effective yield, which reflects net premium amortization/accretion based on actual prepayment activity. (2) The effective yield adjustment is the difference between the net income calculated using the net yield less the current coupon yield. The net yield may be based on management’s estimates of the amount and timing of future cash flows or in the instrument’s contractual cash flows, depending on the relevant accounting standards. (3) Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously purchased at a discount of approximately $670,000 during the nine months ended September 30, 2021. (4) Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously purchased at a discount of approximately $8.1 million and $277,000 during the nine months ended September 30, 2021 and 2020, respectively.

Other Assets

Other Assets	9 Months Ended
	Sep. 30, 2021
Other Assets [Abstract]
Other Assets	Other Assets The following table presents the components of the Company’s Other assets at September 30, 2021 and December 31, 2020: (In Thousands) September 30, 2021 December 31, 2020 REO (1) $ 178,802 $ 249,699 Capital contributions made to loan origination partners 53,537 47,148 Goodwill 61,615 — Intangibles, net (2) 24,700 — Other interest-earning assets 35,437 — Interest receivable 41,432 38,850 Other loan related receivables 45,242 16,682 Lease right-of-use asset (3) 39,500 758 Other 61,338 32,244 Total Other Assets $ 541,603 $ 385,381 (1) Includes $16.1 million and $61.8 million of REO that is held-for-investment at September 30, 2021 and December 31, 2020, respectively. (2) Net of aggregate accumulated amortization of $3.3 million as of September 30, 2021. (3) An estimated incremental borrowing rate of 7.5% was used in connection with the Company’s primary operating lease (see Notes 2 and 10). (a) Real Estate Owned At September 30, 2021, the Company had 674 REO properties with an aggregate carrying value of $178.8 million. At December 31, 2020, the Company had 946 REO properties with an aggregate carrying value of $249.7 million. At September 30, 2021, $176.3 million of residential real estate property was held by the Company that was acquired either through a completed foreclosure proceeding or from completion of a deed-in-lieu of foreclosure or similar legal agreement. In addition, formal foreclosure proceedings were in process with respect to $96.6 million of residential whole loans held at carrying value and $391.5 million of residential whole loans held at fair value at September 30, 2021. The following table presents the activity in the Company’s REO for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 204,762 $ 348,516 $ 249,699 $ 411,659 Adjustments to record at lower of cost or fair value (2,448) 93 (3,390) (11,796) Transfer from residential whole loans (1) 11,673 15,672 50,043 74,891 Purchases and capital improvements, net 1,584 771 2,207 10,072 Disposals and other (2) (36,769) (66,185) (119,757) (185,959) Balance at end of period $ 178,802 $ 298,867 $ 178,802 $ 298,867 Number of properties 674 1,131 674 1,131 (1) Includes a net gain recorded on transfer of approximately $700,000 and $834,000 for the three months ended September 30, 2021 and 2020, respectively; and a net loss recorded on transfer of approximately $400,000 and a net gain recorded on transfer of approximately $4.1 million for the nine months ended September 30, 2021 and 2020, respectively. (b ) Capital Contributions Made to Loan Origination Partners The Company has made investments in several loan originators as part of its strategy to be a reliable source of capital to select partners from whom it sources residential mortgage loans through both flow arrangements and bulk purchases. To date, such contributions of capital include the following investments (based on their carrying value prior to any impairments): $23.2 million of common equity (including partnership interests) and $67.8 million of preferred equity. In addition, for certain partners, options or warrants may have also been acquired that provide the Company the ability to increase the level of its investment if certain conditions are met. At the end of each reporting period, or earlier if circumstances warrant, the Company evaluates whether the nature of its interests and other involvement with the investee entity requires the Company to apply equity method accounting or consolidate the results of the investee entity with the Company’s financial results. On July 1, 2021, the Company completed the acquisition of certain ownership interests in Lima One, which resulted in the Company owning all of Lima One’s outstanding ownership interests. Accordingly, the Company consolidated Lima One’s financial results beginning on that date. In addition, in connection with the purchase accounting for the acquisition, the Company was required to revalue its investments in Lima One common equity, resulting in a $38.9 million gain, which was recorded in Other Income in the Company’s consolidated statements of operations (Refer to Note 16 for further details). Further, to the extent that the nature of the Company’s interests has resulted in the need for the Company to apply equity method accounting, the impact of such accounting on the Company’s results for periods subsequent to that in which the Company was determined to have significant influence over the investee company was not material for any period. With respect to investments in entities that the Company does not either consolidate or apply equity method accounting, as the interests acquired to date by the Company generally do not have a readily determinable fair value, the Company accounts for these interests (including any acquired options and warrants) in loan originators initially at cost. The carrying value of these investments will be adjusted if it is determined that an impairment has occurred or if there has been a subsequent observable transaction in either the investee company’s equity securities or a similar security that provides evidence to support an adjustment to the carrying value. Following an evaluation of the anticipated impact of COVID-19 on economic conditions for the short to medium term, the Company recorded impairment charges of $65.2 million on investments in certain loan origination partners during the nine months ended September 30, 2020, which was included in “Impairment and other losses on securities available-for-sale and other assets” on the consolidated statements of operations. During the three months ended September 30, 2021, the Company reversed $10.0 million of previously recorded impairment as two of the Company’s preferred equity investments were repaid in full. This gain was recorded in Other Income in the consolidated statements of operations. The Company did not record any impairment charges to earnings on investments in certain loan origination partners during the three and nine months ended September 30, 2021. At September 30, 2021, approximately $1.0 billion of the Company’s Residential whole loans, at carrying value were serviced by entities in which the Company has an investment, including Lima One. (c) Derivative Instruments The Company’s derivative instruments have historically generally been comprised of Swaps, the majority of which were designated as cash flow hedges against the interest rate risk associated with certain borrowings. In addition, in connection with managing risks associated with purchases of longer duration Agency MBS, the Company also entered into Swaps that were not designated as hedges for accounting purposes. In response to the turmoil in the financial markets resulting from COVID-19 experienced during the three months ended March 31, 2020, and given that management no longer considered these transactions to be effective hedges in the then prevailing interest rate environment, the Company unwound all of its approximately $4.1 billion of Swap hedging transactions late in the first quarter of 2020 in order to recover previously posted margin. The following table presents the net impact of the Company’s derivative hedging instruments on its net interest expense and the weighted average interest rate paid and received for such Swaps for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (Dollars in Thousands) 2021 2020 2021 2020 Interest (expense)/income attributable to Swaps $ — $ — $ — $ (3,359) Weighted average Swap rate paid — % — % — % 2.06 % Weighted average Swap rate received — % — % — % 1.63 % During the nine months ended September 30, 2020, the Company recorded net losses on Swaps not designated in hedging relationships of approximately $4.3 million, which included $9.4 million of losses realized on the unwind of certain Swaps. These amounts are included in Other income, net on the Company’s consolidated statements of operations. Impact of Derivative Hedging Instruments on AOCI The following table presents the impact of the Company’s derivative hedging instruments on its AOCI for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 AOCI from derivative hedging instruments: Balance at beginning of period $ — $ (7,176) $ — $ (22,675) Net loss on Swaps — — — (50,127) Reclassification adjustment for losses/gains related to hedging instruments included in net income — 7,176 — 72,802 Balance at end of period $ — $ — $ — $ — TBA Securities In order to economically hedge the risks arising from the investments in Agency eligible investor loans, the Company has entered into short positions in certain TBA securities. The table below summarizes open short positions in TBA securities as of September 30, 2021, which had an aggregate value of $5.4 million. TBA Security Notional Amount Settlement Date (In Thousands) FNCL 2.0 10/21 $ 420,000 October 14, 2021 FNCL 2.5 10/21 $ 330,000 October 14, 2021

Financing Agreements

Financing Agreements	9 Months Ended
	Sep. 30, 2021
Disclosure of Repurchase Agreements [Abstract]
Financing Agreements	Financing Agreements The following tables present the components of the Company’s Financing agreements at September 30, 2021 and December 31, 2020: September 30, 2021 (In Thousands) Unpaid Principal Balance Amortized Cost Balance Fair Value/Carrying Value (1) Financing agreements, at fair value Agreements with mark-to-market collateral provisions $ 1,275,172 $ 1,275,172 $ 1,275,172 Agreements with non-mark-to-market collateral provisions 689,205 689,205 690,583 Securitized debt 527,160 527,154 530,829 Total Financing agreements, at fair value $ 2,491,537 $ 2,491,531 $ 2,496,584 Financing agreements, at carrying value Securitized debt $ 1,522,354 $ 1,514,900 Agreements with mark-to-market collateral provisions 1,155,964 1,155,820 Agreements with non-mark-to-market collateral provisions 157,784 157,366 Convertible senior notes 230,000 226,138 Total Financing agreements, at carrying value $ 3,066,102 $ 3,054,224 Total Financing agreements $ 5,557,639 $ 5,550,808 December 31, 2020 (In Thousands) Unpaid Principal Balance Amortized Cost Balance Fair Value/Carrying Value (1) Financing agreements, at fair value Agreements with non-mark-to-market collateral provisions $ 1,156,899 $ 1,156,899 $ 1,159,213 Agreements with mark-to-market collateral provisions 1,338,077 1,338,077 1,338,077 Securitized debt 866,203 857,553 869,482 Total Financing agreements, at fair value $ 3,361,179 $ 3,352,529 $ 3,366,772 Financing agreements, at carrying value Securitized debt $ 648,300 $ 645,027 Convertible senior notes 230,000 225,177 Senior notes 100,000 100,000 Total Financing agreements, at carrying value $ 978,300 $ 970,204 Total Financing agreements $ 4,339,479 $ 4,336,976 (1) Financing agreements at fair value are reported at estimated fair value each period as a result of the Company’s fair value option election. Other financing arrangements are reported at their carrying value (amortized cost basis) as the fair value option was not elected on these liabilities. Consequently, Total Financing agreements as presented reflects a summation of balances reported at fair value and carrying value. (a) Financing Agreements, at Fair Value In conjunction with its exit from forbearance arrangements in the second quarter of 2020, the Company entered into several asset backed financing arrangements and renegotiated financing arrangements for certain assets with existing lenders, which together resulted in the Company essentially refinancing the majority of its investment portfolio. The Company elected the fair value option on these financing arrangements, primarily to simplify the accounting associated with costs incurred to establish the new facilities or renegotiate existing facilities. The Company considers the most relevant feature that distinguishes between the various asset backed financing arrangements is how the financing arrangement is collateralized, including the ability of the lender to make margin calls on the Company based on changes in value of the underlying collateral securing the financing. Accordingly, further details are provided below regarding assets that are financed with agreements that have non-mark-to-market collateral provisions and assets that are financed with agreements that have mark-to-market collateral provisions. Agreements with non-mark-to-market collateral provisions In June 2020, the Company and certain of its subsidiaries entered into a non-mark-to-market term loan facility with certain lenders with an initial borrowing capacity of $1.65 billion. The Company’s borrowing subsidiaries have pledged, as collateral security for the facility, certain of their residential whole loans (excluding Rehabilitation loans), as well as the equity in subsidiaries that own the loans. The facility has an initial term of two years, which may be extended for up to an additional three years, subject to certain conditions, including the payment of an extension fee and provided that no events of default have occurred. For the initial two-year term, the financing cost for the facility will be calculated at a spread over the lender’s financing cost, which, depending on the lender, is expected to be based either on three-month London Interbank Offered Rate (‘LIBOR”), or an index that it expected over time to be closely correlated to changes in three-month LIBOR. At September 30, 2021, the amount financed under this facility was approximately $573.8 million. In addition, the Company also entered into non-mark-to-market financing facilities on Rehabilitation loans. Under these facilities, Rehabilitation loans, as well as the equity in subsidiaries that own the loans, are pledged as collateral. The facilities have a two-year term and the financing cost is calculated at a spread over three-month LIBOR. At September 30, 2021, the amount financed under these facilities was approximately $116.8 million. The following table presents information with respect to the Company’s financing agreements, at fair value with non-mark-to-market collateral provisions and associated assets pledged as collateral at September 30, 2021 and December 31, 2020: (Dollars in Thousands) September 30, December 31, Non-mark-to-market financing secured by residential whole loans $ 681,567 $ 1,156,125 Fair value of residential whole loans pledged as collateral under financing agreements $ 1,191,747 $ 1,930,283 Weighted average haircut on residential whole loans 42.03 % 39.46 % Non-mark-to-market financing secured by real estate owned $ 9,016 $ 3,088 Fair value of real estate owned pledged as collateral under financing agreements $ 23,296 $ 7,441 Weighted average haircut on real estate owned 61.09 % 59.73 % Agreements with mark-to-market collateral provisions In addition to entering into the financing arrangements discussed above, the Company also entered into a reinstatement agreement with certain lending counterparties that facilitated its exit from the forbearance arrangements that the Company had previously entered into. In connection with the reinstatement agreement, terms of its prior financing arrangements on certain residential whole loans were renegotiated and those arrangements were reinstated on a go-forward basis. These financing arrangements continue to contain mark-to-market provisions that permit the lending counterparties to make margin calls on the Company should the value of the pledged collateral decline. The Company is also permitted to recover previously posted margin payments, should values of the pledged collateral subsequently increase. These facilities generally have a maturity ranging from one billion. The following table presents information with respect to the Company’s financing agreements, at fair value with mark-to-market collateral provisions and associated assets pledged as collateral at September 30, 2021 and December 31, 2020: (Dollars in Thousands) September 30, December 31, Mark-to-market financing agreements secured by residential whole loans $ 1,262,811 $ 1,113,553 Fair value of residential whole loans pledged as collateral under financing agreements (1) $ 1,910,051 $ 1,798,813 Weighted average haircut on residential whole loans (2) 31.84 % 34.17 % Mark-to-market financing agreements secured by securities at fair value $ — $ 213,915 Securities at fair value pledged as collateral under financing agreements $ — $ 399,999 Weighted average haircut on securities at fair value (2) — % 41.16 % Mark-to-market financing agreements secured by real estate owned $ 12,361 $ 10,609 Fair value of real estate owned pledged as collateral under financing agreements $ 38,388 $ 22,525 Weighted average haircut on real estate owned (2) 61.22 % 55.56 % (1) At December 31, 2020, includes Non-Agency MBS with an aggregate fair value of $141.9 million obtained in connection with the Company’s loan securitization transactions that are eliminated in consolidation. (2) Haircut represents the percentage amount by which the collateral value is contractually required to exceed the loan amount. In addition, the Company had aggregate restricted cash held in connection with its financing agreements of $55.5 million and $7.2 million at September 30, 2021 and December 31, 2020, respectively. The following table presents repricing information (excluding the impact of associated derivative hedging instruments, if any) about the Company’s financing agreements, at fair value that have non-mark-to-market collateral provisions as well as those that have mark-to-market collateral provisions, at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Amortized Cost Basis Weighted Average Interest Rate Amortized Cost Basis Weighted Average Interest Rate Time Until Interest Rate Reset (Dollars in Thousands) Within 30 days $ 1,964,377 2.55 % $ 2,494,976 3.16 % Over 30 days to 3 months — — — — Over 3 months to 12 months — — — — Over 12 months — — — — Total financing agreements $ 1,964,377 2.55 % $ 2,494,976 3.16 % Senior Secured Term Loan Facility On June 26, 2020, the Company entered into a $500 million senior secured term loan facility (the “Term Loan Facility”) with certain funds, accounts and/or clients managed by affiliates of Apollo Global Management, Inc. and affiliates of Athene Holding Ltd. The outstanding balance of the Term Loan Facility was repaid and the Term Loan Facility was terminated prior to December 31, 2020. (b) Financing Agreements, at Carrying Value Additional information regarding the Company’s Other financing arrangements as of September 30, 2021, is included below: Securitized Debt Securitized debt represents third-party liabilities of consolidated VIEs and excludes liabilities of the VIEs acquired by the Company that are eliminated in consolidation. The third-party beneficial interest holders in the VIEs have no recourse to the general credit of the Company. The weighted average fixed rate on the securitized debt was 1.55% at September 30, 2021 (see Notes 10 and 15 for further discussion). Agreements with non-mark-to-market collateral provisions The following table presents information with respect to the Company’s financing agreements, at carrying value with non-mark-to-market collateral provisions, for which the fair value option was not elected, and associated assets pledged as collateral at September 30, 2021 (none were outstanding at December 31, 2020): (Dollars in Thousands) September 30, Non-mark-to-market financing agreements secured by residential whole loans $ 157,366 Fair value of residential whole loans pledged as collateral under financing agreements $ 182,316 Weighted average haircut on residential whole loans (1) 13.00 % (1) Haircut represents the percentage amount by which the collateral value is contractually required to exceed the loan amount. Agreements with mark-to-market collateral provisions The following table presents information with respect to the Company’s financing agreements, at carrying value with mark-to-market collateral provisions, for which the fair value option was not elected, and associated assets pledged as collateral at September 30, 2021 (none were outstanding at December 31, 2020): (Dollars in Thousands) September 30, Mark-to-market financing agreements secured by residential whole loans $ 984,016 Fair value of residential whole loans pledged as collateral under financing agreements $ 1,161,100 Weighted average haircut on residential whole loans (1) 15.21 % Mark-to-market financing agreements secured by securities at fair value $ 171,804 Securities at fair value pledged as collateral under financing agreements $ 283,037 Weighted average haircut on securities at fair value (1) 38.33 % (1) Haircut represents the percentage amount by which the collateral value is contractually required to exceed the loan amount. The following table presents repricing information (excluding the impact of associated derivative hedging instruments, if any) about the Company’s financing agreements, at carrying value that have non-mark-to-market collateral provisions as well as those that have mark-to-market collateral provisions, for which the fair value option was not elected, at September 30, 2021 and December 31, 2020: September 30, 2021 Amortized Cost Basis Weighted Average Interest Rate Time Until Interest Rate Reset (Dollars in Thousands) Within 30 days $ 1,259,588 1.90 % Over 30 days to 3 months 36,141 4.30 Over 3 months to 12 months 18,018 4.50 Over 12 months — — Total financing agreements $ 1,313,747 2.00 % Convertible Senior Notes On June 3, 2019, the Company issued $230.0 million in aggregate principal amount of its Convertible Senior Notes in an underwritten public offering, including an additional $30.0 million issued pursuant to the exercise of the underwriters’ option to purchase additional Convertible Senior Notes. The total net proceeds the Company received from the offering were approximately $223.3 million, after deducting offering expenses and the underwriting discount. The Convertible Senior Notes bear interest at a fixed rate of 6.25% per year, paid semiannually on June 15 and December 15 of each year commencing December 15, 2019 and will mature on June 15, 2024, unless earlier converted, redeemed or repurchased in accordance with their terms. The Convertible Senior Notes are convertible at the option of the holders at any time until the close of business on the business day immediately preceding the maturity date into shares of the Company’s common stock based on an initial conversion rate of 125.7387 shares of the Company’s common stock for each $1,000 principal amount of the Convertible Senior Notes, which is equivalent to an initial conversion price of approximately $7.95 per share of common stock. The Convertible Senior Notes have an effective interest rate, including the impact of amortization to interest expense of debt issuance costs, of 6.94%. The Company does not have the right to redeem the Convertible Senior Notes prior to maturity, except to the extent necessary to preserve its status as a REIT, in which case the Company may redeem the Convertible Senior Notes, in whole or in part, at a redemption price equal to the principal amount redeemed plus accrued and unpaid interest. The Convertible Senior Notes are the Company’s senior unsecured obligations and are effectively junior to all of the Company’s secured indebtedness, which includes the Company’s repurchase agreements and other financing arrangements, to the extent of the value of the collateral securing such indebtedness and equal in right of payment to the Company’s existing and future senior unsecured obligations, including the Senior Notes. Senior Notes On April 11, 2012, the Company issued $100.0 million in aggregate principal amount of its Senior Notes in an underwritten public offering. On January 6, 2021, the Company redeemed all of its outstanding Senior Notes. The Senior Notes bore interest at a fixed rate of 8.00% per year, paid quarterly in arrears on January 15, April 15, July 15 and October 15. The Senior Notes had an effective interest rate, including the impact of amortization to interest expense of debt issuance costs, of 8.31%. (c) Counterparties The Company had financing agreements, including repurchase agreements and other forms of secured financing, with 13 and 7 counterparties at September 30, 2021 and December 31, 2020, respectively. The following table presents information with respect to each counterparty under financing agreements for which the Company had greater than 5% of stockholders’ equity at risk in the aggregate at September 30, 2021: September 30, 2021 Counterparty Rating (1) Amount at Risk (2) Weighted Percent of Counterparty (Dollars in Thousands) Barclays Bank (3) BBB/Aa3/A $ 527,745 1 20.3 % Credit Suisse BBB+/Baa1/A- 420,704 1 16.2 Wells Fargo A+/Aa2/AA- 296,559 1 11.4 (1) As rated at September 30, 2021 by S&P, Moody’s and Fitch, Inc., respectively. The counterparty rating presented is the lowest published rating for these entities. (2) The amount at risk reflects the difference between (a) the amount loaned to the Company through financing agreements, including interest payable, and (b) the cash and the fair value of the securities pledged by the Company as collateral, including accrued interest receivable on such securities. (3) Includes amounts at risk with various affiliates of Athene Holding, Ltd., held via participation in a loan syndication administered by Barclays Bank. (d) Pledged Collateral The following tables present the Company’s assets (based on carrying value) pledged as collateral for its various financing arrangements as of September 30, 2021 and December 31, 2020: September 30, 2021 Financing Agreements (In Thousands) Non-Mark-to-Market Mark-to-Market Securitized Total Assets: Residential whole loans, at carrying value $ 794,267 $ 533,633 $ 1,679,702 $ 3,007,602 Residential whole loans, at fair value 555,738 2,499,284 650,507 3,705,529 Securities, at fair value — 222,705 — 222,705 Other assets: REO 19,919 32,363 36,053 88,335 Total $ 1,369,924 $ 3,287,985 $ 2,366,262 $ 7,024,171 December 31, 2020 Financing Agreements (In Thousands) Non-Mark-to-Market Mark-to-Market Securitized Total Assets: Residential whole loans, at carrying value $ 1,497,281 $ 1,207,364 $ 1,436,316 $ 4,140,961 Residential whole loans, at fair value 430,183 396,817 382,349 1,209,349 Securities, at fair value — 442,773 — 442,773 Other assets: REO — — 49,477 49,477 Total $ 1,927,464 $ 2,046,954 $ 1,868,142 $ 5,842,560

Collateral Positions

Collateral Positions	9 Months Ended
	Sep. 30, 2021
Collateral Positions
Collateral Positions	Collateral Positions The Company pledges securities or cash as collateral to its counterparties in relation to certain of its financing arrangements. In addition, the Company receives securities or cash as collateral pursuant to financing provided under reverse repurchase agreements. The Company exchanges collateral with its counterparties based on changes in the fair value, notional amount and term of the associated financing arrangements and Swap contracts, as applicable. In connection with these margining practices, either the Company or its counterparty may be required to pledge cash or securities as collateral. When the Company’s pledged collateral exceeds the required margin, the Company may initiate a reverse margin call, at which time the counterparty may either return the excess collateral or provide collateral to the Company in the form of cash or equivalent securities.

Offsetting Assets and Liabiliti

Offsetting Assets and Liabilities	9 Months Ended
	Sep. 30, 2021
Offsetting [Abstract]
Offsetting Assets and Liabilities	Offsetting Assets and Liabilities Certain of the Company’s financing arrangements and derivative transactions are governed by underlying agreements that generally provide for a right of setoff in the event of default or in the event of a bankruptcy of either party to the transaction. In the Company’s consolidated balance sheets, all balances associated with repurchase agreements are presented on a gross basis. The fair value of financial instruments pledged against the Company’s financing arrangements, excluding securitizations, was $4.8 billion and $4.2 billion at September 30, 2021 and December 31, 2020, respectively. There were no financial instruments pledged against the Company’s Swaps at September 30, 2021 and December 31, 2020, respectively. In addition, cash that has been pledged as collateral against financing arrangements and Swaps (if any) is reported as Restricted cash on the Company’s consolidated balance sheets (see Notes 2(e), 5(c) and 6).

Other Liabilities

Other Liabilities	9 Months Ended
	Sep. 30, 2021
Other Liabilities [Abstract]
Other Liabilities	Other Liabilities The following table presents the components of the Company’s Other liabilities at September 30, 2021 and December 31, 2020: (In Thousands) September 30, 2021 December 31, 2020 Payable for unsettled residential whole loans purchases $ 163,015 $ — Dividends and dividend equivalents payable 44,247 34,016 Lease liability 44,284 636 Accrued interest payable 11,174 11,116 Accrued expenses and other 73,235 24,754 Total Other Liabilities $ 335,955 $ 70,522

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Lease Commitments The Company’s primary lease commitments relate to its corporate headquarters. In April 2021, the Company relocated its corporate headquarters, terminating its prior lease on April 30, 2021. For the three and nine months ended September 30, 2021, the Company recorded aggregate lease expense of approximately $1.1 million and $2.9 million, respectively, in connection with these two leases. The term specified in the current lease is approximately fifteen years with an option to renew for an additional five years. At September 30, 2021, the contractual minimum rental payments (exclusive of possible rent escalation charges and normal recurring charges for maintenance, insurance and taxes) were as follows: Year Ended December 31, Minimum Rental Payments (In Thousands) 2021 (1) $ 465 2022 5,220 2023 5,236 2024 5,230 2025 4,638 Thereafter 54,156 Total $ 74,945 (1) Reflects contractual minimum rental payments due for the period from October 1, 2021 through December 31, 2021. (b) Representations and Warranties in Connection with Loan Securitization and Other Loan Sale Transactions In connection with the loan securitization and sale transactions entered into by the Company, the Company has the obligation under certain circumstances to repurchase assets previously transferred to securitization vehicles, or otherwise sold, upon breach of certain representations and warranties. As of September 30, 2021, the Company was not aware of any material unsettled repurchase claims that would require a reserve (see Note 15). (c) Rehabilitation Loan Commitments At September 30, 2021, the Company had unfunded commitments of $186.5 million in connection with its purchased Rehabilitation loans. (d) Residential Whole Loan Purchase Commitments

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2021
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity (a) Preferred Stock 7.50% Series B Cumulative Redeemable Preferred Stock (“Series B Preferred Stock”) On April 15, 2013, the Company completed the issuance of 8.0 million shares of its Series B Preferred Stock with a par value of $0.01 per share, and a liquidation preference of $25.00 per share plus accrued and unpaid dividends, in an underwritten public offering. The Company’s Series B Preferred Stock is entitled to receive a dividend at a rate of 7.50% per year on the $25.00 liquidation preference before the Company’s common stock is paid any dividends and is senior to the Company’s common stock with respect to distributions upon liquidation, dissolution or winding up. Dividends on the Series B Preferred Stock are payable quarterly in arrears on or about March 31, June 30, September 30 and December 31 of each year. The Series B Preferred Stock is redeemable at $25.00 per share plus accrued and unpaid dividends (whether or not authorized or declared), exclusively at the Company’s option. The Series B Preferred Stock generally does not have any voting rights, subject to an exception in the event the Company fails to pay dividends on such stock for six or more quarterly periods (whether or not consecutive). Under such circumstances, the Series B Preferred Stock will be entitled to vote to elect two additional directors to the Company’s Board of Directors (the “Board”), until all unpaid dividends have been paid or declared and set apart for payment. In addition, certain material and adverse changes to the terms of the Series B Preferred Stock cannot be made without the affirmative vote of holders of at least 66 2/3% of the outstanding shares of Series B Preferred Stock. The following table presents cash dividends declared by the Company on its Series B Preferred Stock from January 1, 2021 through September 30, 2021: Declaration Date Record Date Payment Date Dividend Per Share August 26, 2021 September 8, 2021 September 30, 2021 $0.46875 May 24, 2021 June 7, 2021 June 30, 2021 $0.46875 February 19, 2021 March 5, 2021 March 31, 2021 $0.46875 Issuance of 6.50% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock (“Series C Preferred Stock”) On February 28, 2020, the Company amended its charter through the filing of articles supplementary to reclassify 12,650,000 shares of the Company’s authorized but unissued common stock as shares of the Company’s Series C Preferred Stock. On March 2, 2020, the Company completed the issuance of 11.0 million shares of its Series C Preferred Stock with a par value of $0.01 per share, and a liquidation preference of $25.00 per share plus accrued and unpaid dividends, in an underwritten public offering. The total net proceeds the Company received from the offering were approximately $266.0 million, after deducting offering expenses and the underwriting discount. The Company’s Series C Preferred Stock is entitled to receive dividends (i) from and including the original issue date to, but excluding, March 31, 2025, at a fixed rate of 6.50% per year on the $25.00 liquidation preference and (ii) from and including March 31, 2025, at a floating rate equal to three-month LIBOR plus a spread of 5.345% per year of the $25.00 per share liquidation preference before the Company’s common stock is paid any dividends, and is senior to the Company’s common stock with respect to distributions upon liquidation, dissolution or winding up. Dividends on the Series C Preferred Stock are payable quarterly in arrears on or about March 31, June 30, September 30 and December 31 of each year. The Series C Preferred Stock is not redeemable by the Company prior to March 31, 2025, except under circumstances where it is necessary to preserve the Company’s qualification as a REIT for U.S. federal income tax purposes and upon the occurrence of certain specified change in control transactions. On or after March 31, 2025, the Company may, at its option, subject to certain procedural requirements, redeem any or all of the shares of the Series C Preferred Stock for cash at a redemption price of $25.00 per share, plus any accrued and unpaid dividends thereon (whether or not authorized or declared) to, but excluding, the redemption date. The Series C Preferred Stock generally does not have any voting rights, subject to an exception in the event the Company fails to pay dividends on such stock for six or more quarterly periods (whether or not consecutive). Under such circumstances, the Series C Preferred Stock will be entitled to vote to elect two additional directors to the Company’s Board, until all unpaid dividends have been paid or declared and set apart for payment. In addition, certain material and adverse changes to the terms of the Series C Preferred Stock cannot be made without the affirmative vote of holders of at least 66 2/3 of the outstanding shares of Series C Preferred Stock. The following table presents cash dividends declared by the Company on its Series C Preferred Stock from January 1, 2021 through September 30, 2021: Declaration Date Record Date Payment Date Dividend Per Share August 26, 2021 September 8, 2021 September 30, 2021 $0.40625 May 24, 2021 June 7, 2021 June 30, 2021 $0.40625 February 19, 2021 March 5, 2021 March 31, 2021 $0.40625 (b) Dividends on Common Stock The following table presents cash dividends declared by the Company on its common stock from January 1, 2021 through September 30, 2021: Declaration Date Record Date Payment Date Dividend Per Share September 15, 2021 September 30, 2021 October 29, 2021 $0.100 (1) June 15, 2021 June 30, 2021 July 30, 2021 $0.100 March 12, 2021 March 31, 2021 April 30, 2021 $0.075 (1) At September 30, 2021, we had accrued dividends and dividend equivalents payable of $44.2 million related to the common stock dividend declared on June 15, 2021. (c) Discount Waiver, Direct Stock Purchase and Dividend Reinvestment Plan (“DRSPP”) On October 15, 2019, the Company filed a shelf registration statement on Form S-3 with the SEC under the Securities Act of 1933, as amended (the “Securities Act”), for the purpose of registering additional common stock for sale through its DRSPP. Pursuant to Rule 462(e) under the Securities Act, this shelf registration statement became effective automatically upon filing with the SEC and, when combined with the unused portion of the Company’s previous DRSPP shelf registration statements, registered an aggregate of 9.0 million shares of common stock. The Company’s DRSPP is designed to provide existing stockholders and new investors with a convenient and economical way to purchase shares of common stock through the automatic reinvestment of dividends and/or optional cash investments. At September 30, 2021, approximately 8.4 million shares of common stock remained available for issuance pursuant to the DRSPP shelf registration statement. During the three and nine months ended September 30, 2021, the Company issued 114,730 and 312,318 shares of common stock through the DRSPP, raising net proceeds of approximately $537,136 and $1.3 million, respectively. From the inception of the DRSPP in September 2003 through September 30, 2021, the Company issued 34,926,721 shares pursuant to the DRSPP, raising net proceeds of $288.9 million. ( d) At-the-Market Offering Program On August 16, 2019 the Company entered into a distribution agreement under the terms of which the Company may offer and sell shares of its common stock having an aggregate gross sales price of up to $400.0 million (the “ATM Shares”), from time to time, through various sales agents, pursuant to an at-the-market equity offering program (the “ATM Program”). Sales of the ATM Shares, if any, may be made in negotiated transactions or by transactions that are deemed to be “at-the-market” offerings, as defined in Rule 415 under the Securities Act, including sales made directly on the New York Stock Exchange (“NYSE”) or sales made to or through a market maker other than an exchange. The sales agents are entitled to compensation of up to two percent of the gross sales price per share for any shares of common stock sold under the distribution agreement. During the nine months ended September 30, 2021, the Company did not sell any shares of common stock through the ATM Program. At September 30, 2021, approximately $390.0 million remained outstanding for future offerings under this program. (e) Stock Repurchase Program On November 2, 2020, the Company’s Board authorized a share repurchase program under which the Company may repurchase up to $250 million of its common stock through the end of 2022. The Board’s authorization replaces the authorization under the Company’s existing stock repurchase program that was adopted in December 2013, which authorized the Company to repurchase up to 10.0 million shares of common stock and under which approximately 6.6 million remained available for repurchase. The stock repurchase program does not require the purchase of any minimum number of shares. The timing and extent to which the Company repurchases its shares will depend upon, among other things, market conditions, share price, liquidity, regulatory requirements and other factors, and repurchases may be commenced or suspended at any time without prior notice. Acquisitions under the share repurchase program may be made in the open market, through privately negotiated transactions or block trades or other means, in accordance with applicable securities laws (including, in the Company’s discretion, through the use of one or more plans adopted under Rule 10b5-1 promulgated under the Exchange Act of 1934, as amended (the “Exchange Act”)). The Company did not repurchase any shares of its common stock during the three months ended September 30, 2021. During the nine months ended September 30, 2021, the Company repurchased 11,606,229 shares of its common stock through the stock repurchase program at an average cost of $4.14 per share and a total cost of approximately $48.1 million, net of fees and commissions paid to the sales agent of approximately $116,000. As of September 30, 2021, the Company was permitted to purchase an additional $117.7 million of its common stock. (f) Accumulated Other Comprehensive Income/(Loss) The following table presents changes in the balances of each component of the Company’s AOCI for the three and nine months ended September 30, 2021: Three Months Ended Nine Months Ended (In Thousands) Net Unrealized Net Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Net Unrealized Net Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Balance at beginning of period $ 66,163 $ — $ (1,588) $ 64,575 $ 79,607 $ — $ (2,314) $ 77,293 OCI before reclassifications (8,029) — 209 (7,820) (21,473) — 935 (20,538) Amounts reclassified from AOCI (1) — — — — — — — — Net OCI during the period (2) (8,029) — 209 (7,820) (21,473) — 935 (20,538) Balance at end of period $ 58,134 $ — $ (1,379) $ 56,755 $ 58,134 $ — $ (1,379) $ 56,755 (1) See separate table below for details about these reclassifications. (2) For further information regarding changes in OCI, see the Company’s consolidated statements of comprehensive income/(loss). (3) Net Unrealized Gain/(Loss) on Financing Agreements at Fair Value due to changes in instrument-specific credit risk. The following table presents changes in the balances of each component of the Company’s AOCI for the three and nine months ended September 30, 2020: Three Months Ended Nine Months Ended (In Thousands) Net Unrealized Net Gain/(Loss) on Swaps Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Net Unrealized Net Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Balance at beginning of period $ 52,889 $ (7,176) $ — $ 45,713 $ 392,722 $ (22,675) $ — $ 370,047 OCI before reclassifications 15,082 — (22,652) (7,570) 408,585 (50,127) (22,652) 335,806 Amounts reclassified from AOCI (1) (60) 7,176 — 7,116 (733,396) 72,802 — (660,594) Net OCI during the period (2) 15,022 7,176 (22,652) (454) (324,811) 22,675 (22,652) (324,788) Balance at end of period $ 67,911 $ — $ (22,652) $ 45,259 $ 67,911 $ — $ (22,652) $ 45,259 (1) See separate table below for details about these reclassifications. (2) For further information regarding changes in OCI, see the Company’s consolidated statements of comprehensive income/(loss). (3) Net Unrealized Gain/(Loss) on Financing Agreements at Fair Value due to changes in instrument-specific credit risk. The following table presents information about the significant amounts reclassified out of the Company’s AOCI for the three and nine months ended September 30, 2021: Three Months Ended Nine Months Ended Details about AOCI Components Amounts Reclassified from AOCI Affected Line Item in the Statement (In Thousands) AFS Securities: Realized gain on sale of securities $ — $ — Net realized gain/(loss) on sales of securities and residential whole loans Impairment recognized in earnings — — Other, net Total AFS Securities $ — $ — Total reclassifications for period $ — $ — The following table presents information about the significant amounts reclassified out of the Company’s AOCI for the three and nine months ended September 30, 2020: Three Months Ended Nine Months Ended Details about AOCI Components Amounts Reclassified from AOCI Affected Line Item in the Statement (In Thousands) AFS Securities: Realized gain on sale of securities $ (60) $ (389,127) Net realized gain/(loss) on sales of securities and residential whole loans Impairment recognized in earnings — (344,269) Other, net Total AFS Securities $ (60) $ (733,396) Swaps designated as cash flow hedges: Amortization of de-designated hedging instruments 7,176 72,802 Other, net Total Swaps designated as cash flow hedges 7,176 72,802 Total reclassifications for period $ 7,116 $ (660,594)

EPS Calculation

EPS Calculation	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
EPS Calculation	EPS Calculation The following table presents a reconciliation of the earnings/(loss) and shares used in calculating basic and diluted earnings/(loss) per share for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands, Except Per Share Amounts) 2021 2020 2021 2020 Basic Earnings/(Loss) per Share: Net income/(loss) to common stockholders $ 132,511 $ 87,210 $ 284,747 $ (725,207) Dividends declared on preferred stock (8,218) (8,219) (24,656) (21,578) Dividends, dividend equivalents and undistributed earnings allocated to participating securities (435) (325) (915) (91) Net income/(loss) to common stockholders - basic $ 123,858 $ 78,666 $ 259,176 $ (746,876) Basic weighted average common shares outstanding 440,889 453,323 444,481 453,170 Basic Earnings/(Loss) per Share $ 0.28 $ 0.17 $ 0.58 $ (1.65) Diluted Earnings/(Loss) per Share: Net income/(loss) to common stockholders - basic $ 123,858 $ 78,666 $ 259,176 $ (746,876) Interest expense on Convertible Senior Notes 3,920 3,898 11,743 — Dividends, dividend equivalents and undistributed earnings allocated to participating securities 435 — 915 — Net income/(loss) to common stockholders - diluted $ 128,213 $ 82,564 $ 271,834 $ (746,876) Basic weighted average common shares outstanding 440,889 453,323 444,481 453,170 Effect of assumed conversion of Convertible Senior Notes to common shares 28,920 28,920 28,920 — Unvested and vested restricted stock units 3,377 — 1,623 — Effect of Warrants — 11,297 — — Diluted weighted average common shares outstanding (1) 473,186 493,540 475,024 453,170 Diluted Earnings/(Loss) per Share $ 0.27 $ 0.17 $ 0.57 $ (1.65) (1) At September 30, 2021, the Company had approximately 7.0 million equity instruments outstanding that were included in the calculation of diluted EPS for the three and nine months ended September 30, 2021. These equity instruments reflect RSUs (based on current estimate of expected share settlement amount) with a weighted average grant date fair value of $4.21. These equity instruments may continue to have a dilutive impact on future EPS.

Equity Compensation and Other B

Equity Compensation and Other Benefit Plans	9 Months Ended
	Sep. 30, 2021
Compensation Related Costs [Abstract]
Equity Compensation and Other Benefit Plans	Equity Compensation and Other Benefit Plans (a) Equity Compensation Plan In accordance with the terms of the Company’s Equity Plan, which was adopted by the Company’s stockholders on June 10, 2020 (and which amended and restated the Company’s 2010 Equity Compensation Plan), directors, officers and employees of the Company and any of its subsidiaries and other persons expected to provide significant services for the Company and any of its subsidiaries are eligible to receive grants of stock options (“Options”), restricted stock, RSUs, dividend equivalent rights and other stock-based awards under the Equity Plan. Subject to certain exceptions, stock-based awards relating to a maximum of 18.0 million shares of common stock may be granted under the Equity Plan; forfeitures and/or awards that expire unexercised do not count toward this limit. At September 30, 2021, approximately 10.5 million shares of common stock remained available for grant in connection with stock- based awards under the Equity Plan. A participant may generally not receive stock-based awards in excess of 2.0 million shares of common stock in any one year and no award may be granted to any person who, assuming exercise of all Options and payment of all awards held by such person, would own or be deemed to own more than 9.8% of the outstanding shares of the Company’s common stock. Unless previously terminated by the Board, awards may be granted under the Equity Plan until June 10, 2030. Restricted Stock Units Under the terms of the Equity Plan, RSUs are instruments that provide the holder with the right to receive, subject to the satisfaction of conditions set by the Compensation Committee at the time of grant, a payment of a specified value, which may be a share of the Company’s common stock, the fair market value of a share of the Company’s common stock, or such fair market value to the extent in excess of an established base value, on the applicable settlement date. Although the Equity Plan permits the Company to issue RSUs that can settle in cash, all of the Company’s outstanding RSUs as of September 30, 2021 are designated to be settled in shares of the Company’s common stock. The Company granted 1,224,507 and 3,925,589 RSUs during the three and nine months ended September 30, 2021 and granted 497,507 and 1,702,220 RSUs during the three and nine months ended September 30, 2020, respectively. There were no RSUs forfeited during the nine months ended September 30, 2021 and 2020. All RSUs outstanding at September 30, 2021 may be entitled to receive dividend equivalent payments depending on the terms and conditions of the award either in cash at the time dividends are paid by the Company, or for certain time-based and performance-based RSU awards, as a grant of stock at the time such awards are settled. At September 30, 2021 and December 31, 2020, the Company had unrecognized compensation expense of $14.6 million and $6.8 million, respectively, related to RSUs. The unrecognized compensation expense at September 30, 2021 is expected to be recognized over a weighted average period of 2.0 years. Restricted Stock The Company did not grant any shares of restricted common stock during the nine months ended September 30, 2021 and the Company granted 79,545 shares of restricted common stock during the three and nine months ended September 30, 2020. At September 30, 2021, the Company did not have any unvested shares of restricted common stock outstanding. Dividend Equivalents A dividend equivalent is a right to receive a distribution equal to the dividend distributions that would be paid on a share of the Company’s common stock. Dividend equivalents may be granted as a separate instrument or may be a right associated with the grant of another award (e.g., an RSU) under the Equity Plan, and they are paid in cash or other consideration at such times and in accordance with such rules as the Compensation Committee of the Board shall determine in its discretion. Payments made on the Company’s outstanding dividend equivalent rights are generally charged to Stockholders’ Equity when common stock dividends are declared to the extent that such equivalents are expected to vest. The Company made dividend equivalent payments associated with RSU awards of approximately $155,000 and $412,000 during the three and nine months ended September 30, 2021 and approximately $276,000 during the nine months ended September 30, 2020. In addition, no dividend equivalents rights awarded as separate instruments were granted during the nine months ended September 30, 2021 and 2020. Expense Recognized for Equity-Based Compensation Instruments The following table presents the Company’s expenses related to its equity-based compensation instruments for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 RSUs $ 2,306 $ 2,267 $ 6,738 $ 5,094 Total $ 2,306 $ 2,267 $ 6,738 $ 5,094 (b) Deferred Compensation Plans The Company administers deferred compensation plans for its senior officers and non-employee directors (collectively, the “Deferred Plans”), pursuant to which participants may elect to defer up to 100% of certain cash compensation. The Deferred Plans are designed to align participants’ interests with those of the Company’s stockholders. Amounts deferred under the Deferred Plans are considered to be converted into “stock units” of the Company. Stock units do not represent stock of the Company, but rather are a liability of the Company that changes in value as would equivalent shares of the Company’s common stock. Deferred compensation liabilities are settled in cash at the termination of the deferral period, based on the value of the stock units at that time. The Deferred Plans are non-qualified plans under the Employee Retirement Income Security Act of 1974 and, as such, are not funded. Prior to the time that the deferred accounts are settled, participants are unsecured creditors of the Company. The Company’s liability for stock units in the Deferred Plans is based on the market price of the Company’s common stock at the measurement date. The following table presents the Company’s expenses related to its Deferred Plans for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 Non-employee directors $ 43 $ 75 $ 488 $ (1,483) Total $ 43 $ 75 $ 488 $ (1,483) The following table presents the aggregate amount of income deferred by participants of the Deferred Plans through September 30, 2021 and December 31, 2020 that had not been distributed and the Company’s associated liability for such deferrals at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (In Thousands) Undistributed Income Deferred (1) Liability Under Deferred Plans Undistributed Income Deferred (1) Liability Under Deferred Plans Non-employee directors $ 2,564 $ 2,664 $ 2,197 $ 1,809 Total $ 2,564 $ 2,664 $ 2,197 $ 1,809 (1) Represents the cumulative amounts that were deferred by participants through September 30, 2021 and December 31, 2020, which had not been distributed through such respective date. (c) Savings Plan

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments GAAP requires the categorization of fair value measurements into three broad levels that form a hierarchy. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of valuation hierarchy are defined as follows: Level 1 — Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 — Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3 — Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The following describes the valuation methodologies used for the Company’s financial instruments measured at fair value on a recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy. Residential Whole Loans, at Fair Value The Company determines the fair value of its residential whole loans held at fair value after considering valuations obtained from a third-party that specializes in providing valuations of residential mortgage loans. The valuation approach applied generally depends on whether the loan is considered performing or non-performing at the date the valuation is performed. For performing loans, estimates of fair value are derived using a discounted cash flow approach, where estimates of cash flows are determined from the scheduled payments, adjusted using forecasted prepayment, default and loss given default rates. For non-performing loans, asset liquidation cash flows are derived based on the estimated time to liquidate the loan, the estimated value of the collateral, expected costs and estimated home price levels. Estimated cash flows for both performing and non-performing loans are discounted at yields considered appropriate to arrive at a reasonable exit price for the asset. Indications of loan value such as actual trades, bids, offers and generic market color may be used in determining the appropriate discount yield. The Company’s residential whole loans held at fair value are classified as Level 3 in the fair value hierarchy. Securities, at Fair Value Term Notes Backed by MSR-Related Collateral The Company’s valuation process for term notes backed by MSR-related collateral is similar to that used for other residential mortgage securities and considers a number of observable market data points, including prices obtained from pricing services, brokers and repurchase agreement counterparties, dialogue with market participants, as well as management’s observations of market activity. Other factors taken into consideration include estimated changes in fair value of the related underlying MSR collateral and, as applicable, the financial performance of the ultimate parent or sponsoring entity of the issuer, which has provided a guarantee that is intended to provide for payment of interest and principal to the holders of the term notes should cash flows generated by the related underlying MSR collateral be insufficient. Based on its evaluation of the observability of the data used in its fair value estimation process, these assets are classified as Level 2 in the fair value hierarchy. Other Residential Mortgage Securities (including short positions in TBA securities) In determining the fair value of the Company’s other residential mortgage securities, management considers a number of observable market data points, including prices obtained from pricing services and brokers as well as dialogue with market participants. Valuation of TBA securities positions are based on executed levels for positions entered into and subsequently rolled forward, as well as prices obtained from pricing services for outstanding positions at each reporting date. These valuations are assessed for reasonableness by considering market TBA levels observed via Bloomberg for the same coupon and term to maturity. In valuing Non-Agency MBS, the Company understands that pricing services use observable inputs that include, in addition to trading activity observed in the marketplace, loan delinquency data, credit enhancement levels and vintage, which are taken into account to assign pricing factors such as spread and prepayment assumptions. The Company collects and considers current market intelligence on all major markets, including benchmark security evaluations and bid-lists from various sources, when available. The Company’s residential mortgage securities are valued using various market data points as described above, which management considers directly or indirectly observable parameters. Accordingly, these securities are classified as Level 2 in the fair value hierarchy. Financing Agreements, at Fair Value Agreements with mark-to-market collateral provisions These agreements are secured and subject to margin calls and their base interest rates reset frequently to market based rates. As a result, no credit valuation adjustment is required, and the primary factor in determining their fair value is the credit spread paid over the base rate, which is a non-observable input as it is determined based on negotiations with the counterparty. The Company’s financing agreements with mark-to-market collateral provisions held at fair value are classified as Level 2 in the fair value hierarchy if the credit spreads used to price the instrument reset frequently, which is typically the case with shorter term repurchase agreement contracts collateralized by securities. Financing agreements with mark-to-market collateral provisions that are typically longer term and are collateralized by residential whole loans where the credit spread paid over the base rate on the instrument is not reset frequently are classified as Level 3 in the fair value hierarchy. Agreements with non-mark-to-market collateral provisions These agreements are secured, but not subject to margin calls, and their base interest rates reset frequently to market based rates. As a result, a credit valuation adjustment would only be required if there were a significant decrease in collateral value, and the primary factor in determining their fair value is the credit spread paid over the base rate, which is a non-observable input as it is determined based on negotiations with the counterparty. The Company’s financing agreements with non-mark-to-market collateral provisions held at fair value are classified as Level 3 in the fair value hierarchy. Securitized Debt In determining the fair value of securitized debt, management considers a number of observable market data points, including prices obtained from pricing services and brokers as well as dialogue with market participants. Accordingly, the Company’s securitized debt is classified as Level 2 in the fair value hierarchy. Changes to the valuation methodologies used with respect to the Company’s financial instruments are reviewed by management to ensure any such changes result in appropriate exit price valuations. The Company will refine its valuation methodologies as markets and products develop and pricing methodologies evolve. The methods described above may produce fair value estimates that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Company believes its valuation methods are appropriate and consistent with those used by market participants, the use of different methodologies, or assumptions, to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. The Company uses inputs that are current as of the measurement date, which may include periods of market dislocation, during which price transparency may be reduced. The Company reviews the classification of its financial instruments within the fair value hierarchy on a quarterly basis, and management may conclude that its financial instruments should be reclassified to a different level in the future. The following tables present the Company’s financial instruments carried at fair value on a recurring basis as of September 30, 2021 and December 31, 2020, on the consolidated balance sheets by the valuation hierarchy, as previously described: Fair Value at September 30, 2021 (In Thousands) Level 1 Level 2 Level 3 Total Assets: Residential whole loans, at fair value $ — $ — $ 4,093,598 $ 4,093,598 Securities, at fair value — 283,037 — 283,037 Total assets carried at fair value $ — $ 283,037 $ 4,093,598 $ 4,376,635 Liabilities: Agreements with non-mark-to-market collateral provisions $ — $ — $ 690,583 $ 690,583 Agreements with mark-to-market collateral provisions — — 1,275,172 1,275,172 Securitized debt — 530,829 — 530,829 Total liabilities carried at fair value $ — $ 530,829 $ 1,965,755 $ 2,496,584 Fair Value at December 31, 2020 (In Thousands) Level 1 Level 2 Level 3 Total Assets: Residential whole loans, at fair value $ — $ — $ 1,216,902 $ 1,216,902 Securities, at fair value — 399,999 — 399,999 Total assets carried at fair value $ — $ 399,999 $ 1,216,902 $ 1,616,901 Liabilities: Agreements with non-mark-to-market collateral provisions $ — $ — $ 1,159,213 $ 1,159,213 Agreements with mark-to-market collateral provisions — 213,915 1,124,162 1,338,077 Securitized debt — 869,482 — 869,482 Total liabilities carried at fair value $ — $ 1,083,397 $ 2,283,375 $ 3,366,772 Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table presents additional information for the three and nine months ended September 30, 2021 and 2020 about the Company’s Residential whole loans, at fair value, which are classified as Level 3 and measured at fair value on a recurring basis: Residential Whole Loans, at Fair Value Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 2,003,580 $ 1,200,981 $ 1,216,902 $ 1,381,583 Purchases and originations 1,968,079 — 2,805,939 — Draws 11,152 — 11,575 — Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings 20,494 58,863 58,807 (13,683) Repayments (65,985) (21,721) (130,488) (65,934) Sales and repurchases 241 (929) 671 (19,460) Transfer to REO (6,978) (7,530) (32,823) (52,842) Balance at end of period $ 3,930,583 $ 1,229,664 $ 3,930,583 $ 1,229,664 (1) Excluded from the table above are approximately $163.0 million of Residential whole loans, at fair value for which the closing of the purchase transaction had not occurred as of September 30, 2021. The following table presents additional information for the three and nine months ended September 30, 2021 and 2020 about the Company’s financing agreements with non-mark-to-market collateral provisions, which are classified as Level 3 and measured at fair value on a recurring basis: Agreements with Non-mark-to-market Collateral Provisions Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 795,341 $ — $ 1,159,213 $ — Issuances — 2,036,597 — 2,036,597 Payment of principal (104,549) (312,638) (467,695) (312,638) Changes in unrealized losses (209) 3,448 (935) 3,448 Balance at end of period $ 690,583 $ 1,727,407 $ 690,583 $ 1,727,407 The following table presents additional information for the three and nine months ended September 30, 2021 and 2020 about the Company’s financing agreements with mark-to-market collateral provisions, which are classified as Level 3 and measured at fair value on a recurring basis: Agreements with Mark-to-market Collateral Provisions Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 858,066 $ — $ 1,124,162 $ — Issuances 597,761 1,386,592 989,407 1,386,592 Payment of principal (180,655) (156,032) (838,397) (156,032) Changes in unrealized losses — 1,174 — 1,174 Balance at end of period $ 1,275,172 $ 1,231,734 $ 1,275,172 $ 1,231,734 At June 30, 2020, the Company’s financing agreements with non-mark-to-market collateral provisions and the Company’s financing agreements with mark-to-market collateral provisions had just been issued and were therefore classified as Level 2 since their values were based on market transactions. However, market information for similar financings was not available at September 30, 2021 and 2020, and the Company valued these financing instruments based on unobservable inputs. Fair Value Methodology for Level 3 Financial Instruments Residential Whole Loans, at Fair Value The following tables present a summary of quantitative information about the significant unobservable inputs used in the fair value measurement of the Company’s residential whole loans held at fair value for which it has utilized Level 3 inputs to determine fair value as of September 30, 2021 and December 31, 2020: September 30, 2021 (Dollars in Thousands) Fair Value (1) Valuation Technique Unobservable Input Weighted Average (2) Range Purchased Non-Performing Loans $ 774,666 Discounted cash flow Discount rate 3.4 % 2.5 - 11.5% Prepayment rate 12.2 % 0.0 - 43.8% Default rate 4.0 % 0.0 - 31.3% Loss severity 11.8 % 0.0 - 100.0% $ 365,077 Liquidation model Discount rate 8.1 % 6.7 - 50.0% Annual change in home prices 9.3 % 4.6 - 27.3% Liquidation timeline (in years) 1.7 0.1 - 4.8 Current value of underlying properties (3) $ 788 $10 - $3,995 Total $ 1,139,743 December 31, 2020 (Dollars in Thousands) Fair Value (1) Valuation Technique Unobservable Input Weighted Average (2) Range Purchased Non-Performing Loans $ 789,576 Discounted cash flow Discount rate 3.9 % 3.3 - 8.0% Prepayment rate 5.4 % 0.0 - 17.6% Default rate 4.1 % 0.0 - 47.7% Loss severity 12.7 % 0.0 - 100.0% $ 427,061 Liquidation model Discount rate 8.1 % 6.7 - 50.0% Annual change in home prices 3.6 % 1.8 - 6.5% Liquidation timeline (in years) 1.8 0.8 - 4.8 Current value of underlying properties (3) $ 729 $12 - $4,500 Total $ 1,216,637 (1) Excludes approximately $1.1 million and $265,000 of loans for which management considers the purchase price continues to reflect the fair value of such loans at September 30, 2021 and December 31, 2020, respectively. (2) Amounts are weighted based on the fair value of the underlying loan. (3) The simple average value of the properties underlying residential whole loans held at fair value valued via a liquidation model was approximately $432,000 and $380,000 as of September 30, 2021 and December 31, 2020, respectively. September 30, 2021 (Dollars in Thousands) Fair Value (1) Valuation Technique Unobservable Input Weighted Average (2) Range Purchased Performing Loans $ 2,780,698 Discounted cash flow Discount rate 3.3 % 0.9-50.5% Prepayment rate 18.4 % 0.0-50.1% Default rate 0.3 % 0.0-21.8% Loss severity 8.9 % 0.0-10.0% $ 9,814 Liquidation model Discount rate 7.0 % 7.0-7.0% Annual change in home prices 7.8 % 0.0-12.4% Liquidation timeline (in years) 2.2 1.0-4.4 Current value of underlying properties $ 884 $50-$2,075 Total $ 2,790,512 (1) Excludes approximately $162.2 million of loans for which management considers the purchase price continues to reflect the fair value of such loans at September 30, 2021. (2) Amounts are weighted based on the fair value of the underlying loan. Changes in market conditions, as well as changes in the assumptions or methodology used to determine fair value, could result in a significant increase or decrease in the fair value of residential whole loans. Loans valued using a discounted cash flow model are most sensitive to changes in the discount rate assumption, while loans valued using the liquidation model technique are most sensitive to changes in the current value of the underlying properties and the liquidation timeline. Increases in discount rates, default rates, loss severities, or liquidation timelines, either in isolation or collectively, would generally result in a lower fair value measurement, whereas increases in the current or expected value of the underlying properties, in isolation, would result in a higher fair value measurement. In practice, changes in valuation assumptions may not occur in isolation and the changes in any particular assumption may result in changes in other assumptions, which could offset or amplify the impact on the overall valuation. The following table presents the carrying values and estimated fair values of the Company’s financial instruments at September 30, 2021 and December 31, 2020: September 30, 2021 September 30, 2021 December 31, 2020 Level in Fair Value Hierarchy Carrying Estimated Fair Value Carrying Estimated Fair Value (In Thousands) Financial Assets: Residential whole loans 3 $ 7,081,462 $ 7,280,297 $ 5,325,401 $ 5,499,303 Securities, at fair value 2 283,037 283,037 399,999 399,999 Cash and cash equivalents 1 526,241 526,241 814,354 814,354 Restricted cash 1 55,507 55,507 7,165 7,165 Financial Liabilities (1) : Financing agreements with non-mark-to-market collateral provisions 3 847,949 848,367 1,159,213 1,159,213 Financing agreements with mark-to-market collateral provisions 3 2,259,188 2,259,332 1,124,162 1,124,162 Financing agreements with mark-to-market collateral provisions 2 171,804 171,804 213,915 213,915 Securitized debt (2) 2 2,045,729 2,053,714 1,514,509 1,519,567 Convertible senior notes 2 226,138 234,328 225,177 228,287 Senior notes (3) 1 — — 100,000 100,031 (1) Carrying value of securitized debt, Convertible Senior Notes, Senior Notes and certain repurchase agreements is net of associated debt issuance costs. (2) Includes Securitized debt that is carried at amortized cost basis and fair value. (3) On January 6, 2021, the Company redeemed all of its outstanding Senior Notes (see Note 6). Other Assets Measured at Fair Value on a Nonrecurring Basis The Company holds REO at the lower of the current carrying amount or fair value less estimated selling costs. During the nine months ended September 30, 2021 and 2020, the Company recorded REO with an aggregate estimated fair value, less estimated cost to sell, of $50.0 million and $74.9 million, respectively, at the time of foreclosure. The Company classifies fair value measurements of REO as Level 3 in the fair value hierarchy. In addition, on July 1, 2021, in connection with the Lima One transaction (see Note 16), the Company revalued its previously existing investments in Lima One and recorded a gain of $38.9 million. In connection with the Lima One transaction, all of Lima One’s assets and liabilities were recorded at their estimated fair value.

Use of Special Purpose Entities

Use of Special Purpose Entities and Variable Interest Entities	9 Months Ended
	Sep. 30, 2021
Use of Special Purpose Entities and Variable Interest Entities
Use of Special Purpose Entities and Variable Interest Entities	Use of Special Purpose Entities and Variable Interest Entities A Special Purpose Entity (“SPE”) is an entity designed to fulfill a specific limited need of the company that organized it. SPEs are often used to facilitate transactions that involve securitizing financial assets or re-securitizing previously securitized financial assets. The objective of such transactions may include obtaining non-recourse financing, obtaining liquidity or refinancing the underlying financial assets on improved terms. Securitization involves transferring assets to a SPE to convert all or a portion of those assets into cash before they would have been realized in the normal course of business, through the SPE’s issuance of debt or equity instruments. Investors in a SPE usually have recourse only to the assets in the SPE and, depending on the overall structure of the transaction, may benefit from various forms of credit enhancement such as over-collateralization in the form of excess assets in the SPE, priority with respect to receipt of cash flows relative to holders of other debt or equity instruments issued by the SPE, or a line of credit or other form of liquidity agreement that is designed with the objective of ensuring that investors receive principal and/or interest cash flow on the investment in accordance with the terms of their investment agreement. The Company has entered into several financing transactions that resulted in the Company consolidating as VIEs the SPEs that were created to facilitate these transactions. See Note 2(q) for a discussion of the accounting policies applied to the consolidation of VIEs and transfers of financial assets in connection with financing transactions. The Company has engaged in loan securitizations primarily for the purpose of obtaining improved overall financing terms as well as non-recourse financing on a portion of its residential whole loan portfolio. Notwithstanding the Company’s participation in these transactions, the risks facing the Company are largely unchanged as the Company remains economically exposed to the first loss position on the underlying assets transferred to the VIEs. Loan Securitization Transactions The following table summarizes the key details of the Company’s loan securitization transactions currently outstanding as of September 30, 2021 and December 31, 2020: (Dollars in Thousands) September 30, 2021 December 31, 2020 Aggregate unpaid principal balance of residential whole loans sold $ 3,047,295 $ 2,232,561 Face amount of Senior Bonds issued by the VIE and purchased by third-party investors $ 2,788,383 $ 1,862,068 Outstanding amount of Senior Bonds, at carrying value $ 1,514,900 (1) $ 645,027 (1) Outstanding amount of Senior Bonds, at fair value $ 530,829 $ 869,482 Outstanding amount of Senior Bonds, total $ 2,045,729 $ 1,514,509 Weighted average fixed rate for Senior Bonds issued 1.55 % (2) 2.11 % (2) Weighted average contractual maturity of Senior Bonds 41 years (2) 41 years (2) Face amount of Senior Support Certificates received by the Company (3) $ 227,167 $ 268,548 Cash received $ 2,788,354 $ 1,853,408 (1) Net of $7.7 million and $3.2 million of deferred financing costs at September 30, 2021 and December 31, 2020, respectively. (2) At September 30, 2021 and December 31, 2020, $387.6 million and $568.7 million, respectively, of Senior Bonds sold in securitization transactions contained a contractual coupon step-up feature whereby the coupon increases by either 100 or 300 basis points or more at 36 months from issuance if the bond is not redeemed before such date. (3) Provides credit support to the Senior Bonds sold to third-party investors in the securitization transactions. During the three and nine months ended September 30, 2021, the Company issued Senior Bonds with a current face of $277.3 million and $1.5 billion to third-party investors for proceeds of $277.3 million and $1.5 billion, respectively, before offering costs and accrued interest. The Senior Bonds issued by the Company during the three months ended September 30, 2021 are included in “Financing agreements, at carrying value” (at carrying value) on the Company’s consolidated balance sheets (see Note 6). As of September 30, 2021 and December 31, 2020, as a result of the transactions described above, securitized loans of approximately $2.3 billion and $1.8 billion are included in “Residential whole loans” and REO with a carrying value of approximately $36.1 million and $49.5 million are included in “Other assets” on the Company’s consolidated balance sheets, respectively. As of September 30, 2021 and December 31, 2020, the aggregate carrying value of Senior Bonds issued by consolidated VIEs was $2.0 billion and $1.5 billion, respectively. These Senior Bonds are disclosed as “Securitized debt” and are included in Other liabilities on the Company’s consolidated balance sheets. The holders of the securitized debt have no recourse to the general credit of the Company, but the Company does have the obligation, under certain circumstances, to repurchase assets from the VIE upon the breach of certain representations and warranties with respect to the residential whole loans sold to the VIE. In the absence of such a breach, the Company has no obligation to provide any other explicit or implicit support to any VIE. The Company concluded that the entities created to facilitate the loan securitization transactions are VIEs. The Company completed an analysis of whether each VIE created to facilitate the securitization transactions should be consolidated by the Company, based on consideration of its involvement in each VIE, including the design and purpose of the SPE, and whether its involvement reflected a controlling financial interest that resulted in the Company being deemed the primary beneficiary of each VIE. In determining whether the Company would be considered the primary beneficiary, the following factors were assessed: • whether the Company has both the power to direct the activities that most significantly impact the economic performance of the VIE; and • whether the Company has a right to receive benefits or absorb losses of the entity that could be potentially significant to the VIE. Based on its evaluation of the factors discussed above, including its involvement in the purpose and design of the entity, the Company determined that it was required to consolidate each VIE created to facilitate the loan securitization transactions.

Acquisition of Lima One Holding

Acquisition of Lima One Holdings, LLC	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisition of Lima One Holdings, LLC	Acquisition of Lima One Holdings, LLC On July 1, 2021, the Company completed the acquisition from affiliates of Magnetar Capital of their ownership interests in Lima One Holdings, LLC, the parent company of Lima One Capital, LLC (collectively, “Lima One”), a leading originator and servicer of business purpose loans. In connection with this transaction, the Company also acquired from certain members of management of Lima One their ownership interests in Lima One Holdings, LLC. With the completion of these transactions (collectively, “the transaction”), the Company acquired the remaining approximately 57% of the common equity interests of Lima One that it did not previously own, for cash consideration of $57.3 million and $4.7 million of restricted stock unit awards issued to certain members of the Lima One management team. As a result of these transactions, the Company gained control of 100% of the ownership interests in Lima One and was required to consolidate its financial results from that date. The transaction is accounted for under the purchase method of accounting. Under purchase accounting, the purchase consideration to acquire Lima One is defined as the cash paid to acquire the approximately 57% of the common equity interests not previously owned and the estimated fair value of the previously owned approximately 43% common equity interest. Further, under purchase accounting, the Company was required to revalue the previously owned common equity interest to fair value. At the time of the revaluation, the previously owned common equity interest had a carrying value of $5.6 million (net of a $21.0 million impairment charge that was recorded in the first quarter of 2020). Consequently, the revaluation resulted in the Company recording a gain of $38.9 million that is presented in Other income in the Company’s consolidated statement of operations for the three and nine months ended September 30, 2021. Accordingly, under the purchase method of accounting the purchase consideration allocated was $101.7 million. The restricted stock awards issued are not included in the purchase consideration as it was determined that they should be accounted for as compensation expense for post-combination services. Additionally, concurrent with the closing of the transaction, the Company injected additional capital that facilitated the repayment by Lima One of $47.4 million of outstanding preferred equity interests, of which $22.0 million were held by the Company prior to closing. As the Company had previously recorded an impairment write-down on its investment in Lima One’s preferred equity that was repaid in connection with the transaction, the Company recorded a gain of $5.0 million to reflect the reversal of this impairment charge. This gain was recorded in Other Income in the consolidated statements of operations for the three and nine months ended September 30, 2021. Further, the Company paid a total of $57,000 and $378,000 of acquisition related expenses, which were recorded in Operating and Other Expenses in the consolidated statements of operations for the three and nine months ended September 30, 2021, respectively. The Company performed an allocation of the purchase consideration and recorded the underlying assets acquired (including certain identified intangible assets) and liabilities assumed based on their estimated fair values using the information available at the acquisition date. The excess of the purchase consideration over the net assets acquired of $61.6 million was allocated to goodwill. The goodwill is attributed to further access and expansion into business purpose loan markets as well as access to an experienced management team and workforce that are expected to continue to provide services to the business. In addition, the Company identified and recorded finite-lived intangible assets totaling $28.0 million. The purchase price allocations are summarized in the table below: Purchase Price Allocation (In Thousands) Acquisition Date July 1, 2021 Purchase Price: Cash $ 57,255 Equity method investment at fair value 44,465 Total consideration $ 101,720 Allocated to: Business purpose residential loans, at fair value $ 170,220 Cash and cash equivalents 16,531 Restricted cash 91,394 Other assets 36,864 Goodwill 61,615 Intangible assets 28,000 Total assets acquired $ 404,624 Short term debt, net $ (170,908) Accrued expenses and other liabilities (84,620) Total liabilities assumed $ (255,528) Preferred equity repaid at closing (47,376) Total net assets acquired $ 101,720 The amortization period for each of the finite lived intangible assets and the activity for the three months ended September 31, 2021 is summarized in the table below: (Dollars in Thousands) Acquisition Date July 1, 2021 Amortization Three Months Ended September 30, 2021 Carrying Value at September 30, 2021 Amortization Period (Years) (1) Trademarks / Trade Names $ 4,000 $ (100) $ 3,900 10 Customer Relationships 16,000 (2,000) 14,000 4 Internally Developed Software 4,000 (200) 3,800 5 Non-Compete Agreements 4,000 (1,000) 3,000 1 Total Identified Intangibles $ 28,000 $ (3,300) $ 24,700 (1) Amortization is calculated on a straight-line basis over the amortization period, except for Customer Relationships, where amortization is calculated based on expected levels of customer attrition. No pro-forma financial information showing the impact of the transaction as if it had occurred on January 1, 2020 is being presented as such pro-forma information would not be materially different from the Company’s previously reported net revenues or net income and would not be indicative of its future consolidated results of operations. Based on the transactions recorded on Lima One’s stand-alone financial statements since closing of the transaction, Lima One contributed approximately $24.1 million of net interest income and other revenue and $13.7 million of net income to the Company’s consolidated statements of operations for the three and nine months ended September 30, 2021. The Company continues to implement plans to optimize the financing and capital needed to support Lima One’s business activities. Execution of these plans may impact, among other things, the amount and timing of recording transactions on subsidiary entities within the MFA group, the amount of capital allocated to Lima One and the revenues and expenses generated by Lima One in the future. Consequently, the results recorded on Lima One’s stand-alone financial statements in future periods may differ materially from the current period.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Securitization of Agency Eligible Investor LoansSubsequent to the third quarter, the Company completed its first securitization of $312.3 million of Agency eligible investor loans.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The interim unaudited consolidated financial statements of the Company have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted in accordance with these SEC rules and regulations. Management believes that the disclosures included in these interim unaudited consolidated financial statements are adequate to make the information presented not misleading. The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. In the opinion of management, all normal and recurring adjustments necessary to present fairly the financial condition of the Company at September 30, 2021 and results of operations for all periods presented have been made. The results of operations for the three and nine months ended September 30, 2021 should not be construed as indicative of the results to be expected for the full year. The accompanying consolidated financial statements of the Company have been prepared on the accrual basis of accounting in accordance with GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Although the Company’s estimates contemplate current conditions and how it expects them to change in the future, it is reasonably possible that actual conditions could differ from those estimates, which could materially impact the Company’s results of operations and its financial condition. Management has made significant estimates in several areas, impairment, valuation allowances and loss allowances on residential whole loans (see Note 3), MBS, CRT securities and MSR-related assets (collectively, “Securities, at fair value”) (see Note 4) and Other assets (see Note 5), valuation of Securities, at fair value (see Notes 4 and 14), income recognition and valuation of residential whole loans (see Notes 3 and 14), valuation of derivative instruments (see Notes 5(c) and 14) and income recognition on certain Non-Agency MBS (defined below) purchased at a discount (see Note 4). In addition, estimates are used in the determination of taxable income used in the assessment of REIT compliance and contingent liabilities for related taxes, penalties and interest (see Note 2(n)). Actual results could differ from those estimates. The Company has one reportable segment as it manages its business and analyzes and reports its results of operations on the basis of one operating segment: investing, on a leveraged basis, in residential mortgage assets. The consolidated financial statements of the Company include the accounts of all subsidiaries. All intercompany accounts and transactions have been eliminated. In addition, the Company consolidates entities established to facilitate transactions related to the acquisition and securitization of residential whole loans completed in prior years. Certain prior period amounts have been reclassified to conform to the current period presentation. In particular, prior period disclosures have been conformed to the current period presentation of interest income from residential whole loans at fair value. Starting in the second quarter of 2021, interest income for these loans is presented in interest income in the Company’s consolidated statements of operations. Previously, interest income received on residential whole loans at fair value was presented in other income in the Company’s consolidated statements of operations. On July 1, 2021, the Company completed the acquisition of Lima One Holdings, LLC, the parent company of Lima One Capital, LLC (collectively referred to as “Lima One”), a leading nationwide originator and servicer of business purpose loans (“BPLs”). Lima One’s financial results are consolidated with MFA’s results from that date (see Note 16).
Residential Whole Loans (including Residential Whole Loans transferred to consolidated VIEs)	Residential Whole Loans (including Residential Whole Loans transferred to consolidated VIEs) Residential whole loans included in the Company’s consolidated balance sheets are primarily comprised of pools of fixed- and adjustable-rate residential mortgage loans acquired through consolidated trusts in secondary market transactions or originated by Lima One. The accounting model utilized by the Company is determined at the time each loan package is initially acquired. Prior to the second quarter of 2021, the fair value option was typically elected on loans that were 60 or more days delinquent at purchase (“Purchased Non-performing Loans”). Purchased Credit Deteriorated Loans acquired prior to the second quarter of 2021, and where the underlying borrower had a delinquency status of less than 60 days at the acquisition date, are typically held at carrying value. Purchased Performing Loans acquired prior to the second quarter of 2021 are also typically held at carrying value, but the accounting methods for income recognition and determination and measurement of any required credit loss reserves (as discussed below) differ from those used for Purchased Credit Deteriorated Loans held at carrying value. Starting in the second quarter of 2021, the Company elected the fair value option for all loans acquired, irrespective of borrower delinquency status at acquisition. Over time, the Company expects that election of the fair value option should serve to simplify reporting of the results of its loan investment activities as fair value accounting will be used for the majority of loans in the Company’s portfolio. The accounting model initially applied to loan acquisitions is not permitted to be subsequently changed. Consequently, the Company is not permitted to retroactively apply fair value accounting to loans held at carrying value acquired in periods prior to the second quarter of 2021. The Company’s residential whole loans pledged as collateral against financing agreements are included in the consolidated balance sheets with amounts pledged disclosed in Note 6. Purchases and sales of residential whole loans that are subject to an extended period of due diligence that crosses a reporting date are recorded in our balance sheet at amounts reflecting management’s current estimate of assets that will be acquired or disposed at the closing of the transaction. This estimate is subject to revision at the closing of the transaction, pending the outcome of due diligence performed prior to closing. Residential whole loans purchased under flow arrangements with loan origination partners are generally recorded at the transaction settlement date. Recorded amounts of residential whole loans for which the closing of the purchase transaction is yet to occur are not eligible to be pledged as collateral against any financing agreement until the closing of the purchase transaction. Interest income, credit related losses and changes in the fair value of loans held at fair value are recorded post settlement for acquired loans and until transaction settlement for sold loans (see Notes 3, 6, 7, 14 and 15). Purchased Performing Loans Acquisitions of Purchased Performing Loans to date (which include loans purchased from third parties or loans originated by Lima One and not sold to third parties) have been primarily comprised of: (i) loans to finance (or refinance) one-to-four family residential properties that are not considered to meet the definition of a “Qualified Mortgage” in accordance with guidelines adopted by the Consumer Financial Protection Bureau (“Non-QM loans”), (ii) short-term business purpose loans collateralized by residential properties made to non-occupant borrowers who intend to rehabilitate and sell the property for a profit (“Rehabilitation loans” or “Fix and Flip loans”), (iii) loans to finance (or refinance) non-owner occupied one-to four-family residential properties that are rented to one or more tenants (“Single-family rental loans”), (iv) previously originated loans secured by residential real estate that is generally owner occupied (“Seasoned performing loans”), and (v) loans on investor properties that conform to the standards for purchase by a federally chartered corporation, such as the Federal National Mortgage Association (“Fannie Mae”) or the Federal Home Loan Mortgage Corporation (“Freddie Mac”) (“Agency eligible investor loans”). Purchased Performing Loans are initially recorded at their purchase price (or amount funded for originated loans). Interest income on Purchased Performing Loans acquired at par is accrued based on each loan’s current interest bearing balance and current interest rate, net of related servicing costs. Interest income on such loans acquired at a premium/discount to par is recorded each period based on the contractual coupon net of any amortization of premium or accretion of discount, adjusted for actual prepayment activity. For loans acquired with related servicing rights retained by the seller, interest income is reported net of related serving costs. For Purchased Performing Loans acquired prior to the second quarter of 2021 and where the fair value option was not elected, an allowance for credit losses is recorded at acquisition, and maintained on an ongoing basis, for all losses expected over the life of the respective loan. Any required credit loss allowance would reduce the net carrying value of the loan with a corresponding charge to earnings, and may increase or decrease over time. Significant judgments are required in determining any allowance for credit loss, including assumptions regarding the loan cash flows expected to be collected, the value of the underlying collateral and the ability of the Company to collect on any other forms of security, such as a personal guaranty provided either by the borrower or an affiliate of the borrower. Income recognition is suspended, and interest accruals are reversed against income, for loans at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of income and principal becomes doubtful (i.e., such loans are placed on nonaccrual status). For nonaccrual loans, interest income is recorded under the cash basis method as interest payments are received. Interest accruals are resumed when the loan becomes contractually current. A loan is written off when it is no longer realizable and/or it is legally discharged. Modified loans are considered “troubled debt restructurings” if the Company grants a concession to a borrower who is experiencing financial difficulty (including the interpretation of this definition set forth in OCC Bulletin 2020-35). Charge-offs to the allowance for loan losses occur when losses are confirmed through the receipt of cash or other consideration from the completion of a sale; when a modification or restructuring takes place in which we grant a concession to a borrower or agree to a discount in full or partial satisfaction of the loan; when we take ownership and control of the underlying collateral in full satisfaction of the loan; when loans are reclassified as other investments; or when significant collection efforts have ceased and it is highly likely that a loss has been realized. The aggregate allowance for credit losses is equal to the sum of the losses expected over the life of each respective loan. Expected losses are generally calculated based on the estimated probability of default and loss severity of loans in the portfolio, which involves projecting each loan’s expected cash flows based on their contractual terms, expected prepayments, and estimated default and loss severity rates. The results were not discounted. The default and severity rates were estimated based on the following steps: (i) obtained the Company’s historical experience through an entire economic cycle for each loan type or, to the extent the Company did not have sufficient historical loss experience for a given loan type, publicly available data derived from the historical loss experience of certain banks, which data the Company believes is generally representative of its portfolio, (ii) obtained historical economic data (U.S. unemployment rates and home price appreciation) over the same period, and (iii) estimated default and severity rates during three distinct future periods based on historical default and severity rates during periods when economic conditions similar to those forecasted were experienced. The default and severity rates were applied to the estimated amount of loans outstanding during each future period, based on contractual terms and expected prepayments. Expected prepayments are estimated based on historical experience and current and expected future economic conditions, including market interest rates. The three periods were as follows: (i) a one-year forecast of economic conditions based on U.S. unemployment rates and home price appreciation, followed by (ii) a two-year “reversion” period during which economic conditions (U.S. unemployment rates and home price appreciation) are projected to revert to historical averages on a straight line basis, followed by (iii) the remaining life of each loan, during which period economic conditions (U.S. unemployment rates and home price appreciation) are projected to equal historical averages. In addition, a liability is established (and recorded in Other Liabilities) each period using a similar methodology for committed but undrawn loan amounts. The Company forecasts future economic conditions based on forecasts provided by an external preparer of economic forecasts, as well as its own knowledge of the market and its portfolio. The Company generally considers multiple scenarios and selects the one that it believes results in the most reasonable estimate of expected losses. The Company may apply qualitative adjustments to these results as further described in Note 3. For certain loans where foreclosure has been deemed to be probable, loss estimates are based on whether the value of the underlying collateral is sufficient to recover the carrying value of the loan. This methodology has not changed from the calculation of the allowance for credit losses on January 1, 2021. Purchased Credit Deteriorated Loans The Company has elected to account for these loans as credit deteriorated as they have experienced a more-than-insignificant deterioration in credit quality since origination and were acquired at discounted prices that reflect, in part, the impaired credit history of the borrower. Substantially all of these loans have previously experienced payment delinquencies and the amount owed may exceed the value of the property pledged as collateral. Consequently, these loans generally have a higher likelihood of default than newly originated mortgage loans with loan-to-value ratios (“LTVs”) of 80% or less to creditworthy borrowers. The Company believes that amounts paid to acquire these loans represent fair market value at the date of acquisition. Loans considered credit deteriorated are initially recorded at the purchase price on a net basis, after establishing an initial allowance for credit losses (their initial cost basis is equal to their purchase price plus the initial allowance for credit losses). Subsequent to acquisition, the gross recorded amount for these loans reflects the initial cost basis, plus accretion of interest income, less principal and interest cash flows received. Purchased Credit Deteriorated Loans acquired prior to the second quarter of 2021, or where the fair value option was not otherwise elected, are presented on the Company’s consolidated balance sheets at carrying value, which reflects the recorded cost basis reduced by any allowance for credit losses. Interest income on such loans purchased is recorded each period based on the contractual coupon net of amortization of the difference between their cost basis and unpaid principal balance (“UPB”), subject to the Company’s nonaccrual policy. Residential Whole Loans at Fair Value Certain of the Company’s residential whole loans are presented at fair value on its consolidated balance sheets as a result of a fair value election made at the time of acquisition. Prior to the second quarter of 2021, this accounting election was made primarily on Purchased Non-performing Loans. Starting in the second quarter of 2021, the Company made the fair value election on all loan acquisitions, which, to date, have been comprised exclusively of Purchased Performing Loans including loans originated by Lima One since its consolidation. The Company generally considers accounting for these loans at fair value to be more reflective of the expected pattern of returns from these loans under current economic conditions. The Company determines the fair value of its residential whole loans held at fair value after considering portfolio valuations obtained from a third-party that specializes in providing valuations of residential mortgage loans and trading activity observed in the market place. Subsequent changes in fair value are reported in current period earnings and presented in Net (loss)/gain on residential whole loans measured at fair value through earnings on the Company’s consolidated statements of operations. Interest income is recorded on these loans based on their yield and is presented as part of interest income in the Company’s consolidated statements of operations. Cash outflows associated with loan-related advances made by the Company on behalf of the borrower are included in the basis of the loan and are reflected in unrealized gains or losses reported each period. Income and costs associated with originating loans on which the fair value option was elected are recorded in other income and expense respectively in the period in which they are earned or incurred.
Securities, at Fair Value	Securities, at Fair Value MSR-Related Assets The Company has investments in financial instruments whose cash flows are considered to be largely dependent on underlying MSRs that either directly or indirectly act as collateral for the investment. These financial instruments, which are referred to as MSR-related assets, are discussed in more detail below. The Company’s MSR-related assets pledged as collateral against repurchase agreements are included in the consolidated balance sheets with the amounts pledged disclosed in Note 6. Purchases and sales of MSR-related assets are recorded on the trade date (see Notes 4, 6, 7 and 14). Term Notes Backed by MSR-Related Collateral The Company has invested in term notes that are issued by special purpose vehicles (“SPV”) that have acquired rights to receive cash flows representing the servicing fees and/or excess servicing spread associated with certain MSRs. The Company considers payment of principal and interest on these term notes to be largely dependent on the cash flows generated by the underlying MSRs as this impacts the cash flows available to the SPV that issued the term notes. Credit risk borne by the holders of the term notes is also mitigated by structural credit support in the form of over-collateralization. Credit support is also provided by a corporate guarantee from the ultimate parent or sponsor of the SPV that is intended to provide for payment of interest and principal to the holders of the term notes should cash flows generated by the underlying MSRs be insufficient. The Company’s term notes backed by MSR-related collateral are treated as “available-for-sale” (“AFS”) securities and reported at fair value on the Company’s consolidated balance sheets with unrealized gains and losses excluded from earnings and reported in Accumulated other comprehensive income/(loss) (“AOCI”), a component of Stockholders’ Equity, subject to impairment and loss allowances. Interest income is recognized on an accrual basis on the Company’s consolidated statements of operations. The Company’s valuation process for such notes is similar to that used for residential mortgage securities and considers a number of observable market data points, including prices obtained from pricing services, brokers and repurchase agreement counterparties, dialogue with market participants, as well as management’s observations of market activity. Other factors taken into consideration include estimated changes in fair value of the related underlying MSR collateral, as applicable, and the financial performance of the ultimate parent or sponsoring entity of the issuer, which has provided a guarantee that is intended to provide for payment of interest and principal to the holders of the term notes should cash flows generated by the related underlying MSR collateral be insufficient. Corporate Loans The Company has made or participated in loans to provide financing to entities that originate residential mortgage loans and own the related MSRs. These corporate loans are generally secured by certain MSRs, as well as certain other unencumbered assets owned by the borrower. Corporate loans are recorded on the Company’s consolidated balance sheets at the drawn amount, on which interest income is recognized on an accrual basis on the Company’s consolidated statements of operations, subject to loss allowances. Commitment fees received on the undrawn amount are deferred and recognized as interest income over the remaining loan term at the time of draw. At the end of the commitment period, any remaining deferred commitment fees are recorded as Other Income on the Company’s consolidated statements of operations. The Company evaluates the recoverability of its corporate loans on a quarterly basis considering various factors, including the current status of the loan, changes in the fair value of the MSRs that secure the loan and the recent financial performance of the borrower. Residential Mortgage Securities Prior to the quarter ended June 30, 2020, the Company had invested in residential mortgage-backed securities (“MBS”) that are issued or guaranteed as to principal and/or interest by a federally chartered corporation, such as Fannie Mae or Freddie Mac, or an agency of the U.S. Government, such as the Government National Mortgage Association (“Ginnie Mae”) (collectively, “Agency MBS”), and residential MBS that are not guaranteed by any agency of the U.S. Government or any federally chartered corporation (“Non-Agency MBS”). The Company disposed of its investments in Agency MBS during 2020 and disposed of its remaining investments in Non-Agency MBS during the second quarter of 2021. In addition, the Company has investments in CRT securities that are issued by or sponsored by Fannie Mae and Freddie Mac. The coupon payments on CRT securities are paid by the issuer and the principal payments received are dependent on the performance of loans in either a reference pool or an actual pool of loans. As the loans in the underlying pool are paid, the principal balance of the CRT securities is paid. As an investor in a CRT security, the Company may incur a principal loss if the performance of the actual or reference pool loans results in either an actual or calculated loss that exceeds the credit enhancement of the security owned by the Company. Designation Securities that the Company generally intends to hold until maturity, but that it may sell from time to time as part of the overall management of its business, are designated as AFS. Such securities are carried at their fair value with unrealized gains and losses excluded from earnings (except when an allowance for loan losses is recognized, as discussed below) and reported in AOCI, a component of Stockholders’ Equity. Upon the sale of an AFS security, any unrealized gain or loss is reclassified out of AOCI to earnings as a realized gain or loss using the specific identification method. The Company had elected the fair value option for certain of its previously held Agency MBS that it did not intend to hold to maturity. These securities were carried at their fair value with changes in fair value included in earnings for the period and reported in Other Income, net on the Company’s consolidated statements of operations. In addition, the Company has elected the fair value option for certain of its CRT securities as it considers this method of accounting to more appropriately reflect the risk-sharing structure of these securities. Such securities are carried at their fair value with changes in fair value included in earnings for the period and reported in Other Income, net on the Company’s consolidated statements of operations. Revenue Recognition, Premium Amortization and Discount Accretion Interest income on securities is accrued based on their outstanding principal balance and their contractual terms. Premiums and discounts associated with Agency MBS and Non-Agency MBS assessed as high credit quality at the time of purchase are amortized into interest income over the life of such securities using the effective yield method. Adjustments to premium amortization are made for actual prepayment activity. Determination of Fair Value for Residential Mortgage Securities In determining the fair value of the Company’s residential mortgage securities, management considers a number of observable market data points, including prices obtained from pricing services, brokers and repurchase agreement counterparties, dialogue with market participants, as well as management’s observations of market activity (see Note 14). Allowance for credit losses When the fair value of an AFS security is less than its amortized cost at the balance sheet date, the security is considered impaired. The Company assesses its impaired securities, as well as securities for which a credit loss allowance had been previously recorded, on at least a quarterly basis and determines whether any changes to the allowance for credit losses are required. If the Company intends to sell an impaired security, or it is more likely than not that it will be required to sell the impaired security before its anticipated recovery, then the Company must recognize a write-down through charges to earnings equal to the entire difference between the investment’s amortized cost and its fair value at the balance sheet date. If the Company does not expect to sell an impaired security, only the portion of the impairment related to credit losses is recognized through a loss allowance charged to earnings with the remainder recognized through AOCI on the Company’s consolidated balance sheets. Impairments recognized through other comprehensive income/(loss) (“OCI”) do not impact earnings. Credit loss allowances are subject to reversal through earnings resulting from improvements in expected cash flows. The determination as to whether to record (or reverse) a credit loss allowance is subjective, as such determinations are based on factual information available at the time of assessment as well as the Company’s estimates of future performance and cash flow projections. As a result, the timing and amount of losses constitute material estimates that are susceptible to significant change (see Note 4). Balance Sheet Presentation
Cash and Cash Equivalents	Cash and Cash Equivalents  Cash and cash equivalents include cash on deposit with financial institutions and investments in money market funds, all of which have original maturities of three months or less.  Cash and cash equivalents may also include cash pledged as collateral to the Company by its financing counterparties as a result of reverse margin calls (i.e., margin calls made by the Company).  The Company did not hold any cash pledged by its counterparties at September 30, 2021 and December 31, 2020.
Restricted Cash	Restricted Cash
Goodwill & Intangible Assets	Goodwill & Intangible Assets At September 30, 2021, the Company had goodwill of $61.6 million, which represents the excess of the fair value of consideration paid over the fair value of net assets acquired in connection with the acquisition of Lima One, see Note 16, and other intangible assets of $24.7 million (net of amortization) primarily comprised of customer relationships, non-competition agreements, trademarks and trade names, and internally developed software recognized as part of the acquisition of Lima One. The intangible assets are amortized over their expected useful lives, which range from one
Real Estate Owned (REO)	Real Estate Owned (“REO”) REO represents real estate acquired by the Company, including through foreclosure, deed in lieu of foreclosure, or purchased in connection with the acquisition of residential whole loans. REO acquired through foreclosure or deed in lieu of foreclosure is initially recorded at fair value less estimated selling costs. REO acquired in connection with the acquisition of residential whole loans is initially recorded at its purchase price. Subsequent to acquisition, REO is reported, at each reporting date, at the lower of the current carrying amount or fair value less estimated selling costs and for presentation purposes is included in Other assets on the Company’s consolidated balance sheets. Changes in fair value that result in an adjustment to the reported amount of an REO property that has a fair value at or below its carrying amount are reported in Other Income, net on the Company’s consolidated statements of operations. The Company has acquired certain properties that it holds for investment purposes, including rentals to third parties. These properties are held at their historical basis less depreciation, and are subject to impairment. Related rental income and expenses are recorded in Other Income, net
Leases	LeasesThe Company records its operating lease liabilities and operating lease right-of-use assets on its consolidated balance sheets. The operating lease liabilities are equal to the present value of the remaining fixed lease payments (excluding real estate tax and operating expense escalations) discounted at the Company’s estimated incremental borrowing rate at the date of lease commencement, and the operating lease right-of-use assets are equal to the operating lease liabilities adjusted for lease incentives and initial direct costs. As lease payments are made, the operating lease liabilities are reduced to the present value of the remaining lease payments and the operating lease right-of-use assets are reduced by the difference between the lease expense (straight-lined over the lease term) and the theoretical interest expense amount (calculated using the incremental borrowing rate at the date of lease commencement).
Leasehold Improvements, Real estate and Other Depreciable Assets	Leasehold Improvements, Real estate and Other Depreciable Assets Depreciation is computed on the straight-line method over the estimated useful life of the related assets or, in the case of leasehold improvements, over the shorter of the useful life or the lease term. Furniture, fixtures, computers and related hardware have estimated useful lives ranging from five
Loan Securitization and Other Debt Issuance Costs	Loan Securitization and Other Debt Issuance Costs Loan securitization related costs are costs associated with the issuance of beneficial interests by consolidated VIEs and incurred by the Company in connection with various financing transactions completed by the Company. These costs may include underwriting, rating agency, legal, accounting and other fees. Such costs, which reflect deferred charges (unless the debt is recorded at fair value, as discussed below), are included on the Company’s consolidated balance sheets as a direct deduction from the corresponding debt liability. These deferred charges are amortized as an adjustment to interest expense using the effective interest method. For certain financing agreements, such costs are amortized over the shorter of the period to the expected or stated legal maturity of the debt instruments. The Company periodically reviews the recoverability of these deferred costs and, in the event an impairment charge is required, such amount will be included in Operating and Other Expense on the Company’s consolidated statements of operations.
Financing Arrangements	Financing Agreements The Company finances the majority of its residential mortgage assets with financing agreements that include repurchase agreements and other forms of collateralized financing. Under repurchase agreements, the Company sells assets to a lender and agrees to repurchase the same assets in the future for a price that is higher than the original sale price. The difference between the sale price that the Company receives and the repurchase price that the Company pays represents interest paid to the lender. Although legally structured as sale and repurchase transactions, the Company accounts for repurchase agreements as secured borrowings. Under its repurchase agreements and other forms of collateralized financing, the Company pledges its assets as collateral to secure the borrowing, in an amount which is equal to a specified percentage of the fair value of the pledged collateral, while the Company retains beneficial ownership of the pledged collateral. At the maturity of a repurchase financing, unless the repurchase financing is renewed with the same counterparty, the Company is required to repay the loan including any accrued interest and concurrently receives back its pledged collateral from the lender. With the consent of the lender, the Company may renew a repurchase financing at the then prevailing financing terms. Margin calls, whereby a lender requires that the Company pledge additional assets or cash as collateral to secure borrowings under its repurchase financing with such lender, are routinely experienced by the Company when the value of the assets pledged as collateral declines as a result of principal amortization and prepayments or due to changes in market interest rates, spreads or other market conditions. The Company also may make margin calls on counterparties when collateral values increase. The Company’s repurchase financings collateralized by residential mortgage securities and MSR-related assets typically have terms ranging from one month to six months at inception, while the majority of our financing arrangements collateralized by residential whole loans have terms of twelve months or longer. Should a counterparty decide not to renew a financing arrangement at maturity, the Company must either refinance elsewhere or be in a position to satisfy the obligation. If, during the term of a financing, a lender should default on its obligation, the Company might experience difficulty recovering its pledged assets which could result in an unsecured claim against the lender for the difference between the amount loaned to the Company plus interest due to the counterparty and the fair value of the collateral pledged by the Company to such lender, including accrued interest receivable on such collateral (see Notes 6, 7 and 14). The Company has elected the fair value option on certain of its financing agreements. These agreements are reported at their fair value, with changes in fair value being recorded in earnings each period (or other comprehensive income, to the extent the change results from a change in instrument specific credit risk), as further detailed in Note 6. Financing costs, including “up front” fees paid at inception related to financing agreements at fair value are expensed as incurred. Interest expense is recorded based on the current interest rate in effect for the related agreement.
Equity-Based Compensation	Equity-Based Compensation Compensation expense for equity-based awards that are subject to vesting conditions, is recognized ratably over the vesting period of such awards, based upon the fair value of such awards at the grant date. The Company has made annual grants of restricted stock units (“RSUs”), certain of which cliff vest after a three-year period, subject only to continued employment, and others of which cliff vest after a three-year period, subject to both continued employment and the achievement of certain performance criteria based on a formula tied to the Company’s achievement of average total shareholder return (“TSR”) during that three-year period, as well as the TSR of the Company relative to the TSR of a group of peer companies (over the three-year period) selected by the Compensation Committee of the Company’s Board of Directors (the “Compensation Committee”) at the date of grant. The features in these awards related to the attainment of TSR over a specified period constitute a “market condition,” which impacts the amount of compensation expense recognized for these awards. Specifically, the uncertainty regarding the achievement of the market condition was reflected in the grant date fair valuation of the RSUs, which is recognized as compensation expense over the relevant vesting period. The amount of compensation expense recognized is not dependent on whether the market condition was or will be achieved.
Earnings per Common Share (EPS)	Earnings per Common Share (“EPS”) Basic EPS is computed using the two-class method, which includes the weighted-average number of shares of common stock outstanding during the period and an estimate of other securities that participate in dividends, such as the Company’s dividend equivalents attached to/associated with RSUs, to arrive at total common equivalent shares. In applying the two-class method, earnings are allocated to both shares of common stock and estimated securities that participate in dividends based on their respective weighted-average shares outstanding for the period. For the diluted EPS calculation, common equivalent shares are further adjusted for the effect of RSUs outstanding that are unvested and have dividends that are subject to forfeiture, and
Comprehensive Income/(Loss)	Comprehensive Income/(Loss) The Company’s comprehensive income/(loss) available to common stock and participating securities includes net income, the change in net unrealized gains/(losses) on its AFS securities and derivative hedging instruments (to the extent that such changes are not recorded in earnings), adjusted by realized net gains/(losses) reclassified out of AOCI for sold AFS securities and terminated hedging relationships, as well as the portion of unrealized gains/(losses) on its financing agreements held at fair value related to instrument-specific credit risk, and is reduced by dividends declared on the Company’s preferred stock and issuance costs of redeemed preferred stock.
U.S. Federal Income Taxes	U.S. Federal Income Taxes The Company has elected to be taxed as a REIT under the provisions of the Internal Revenue Code of 1986, as amended, (the “Code”), and the corresponding provisions of state law. The Company expects to operate in a manner that will enable it to satisfy the various requirements to maintain its status as a REIT for federal income tax purposes. In order to maintain its status as a REIT, the Company must, among other things, distribute at least 90% of its REIT taxable income (excluding net long-term capital gains) to stockholders in the timeframe permitted by the Code. As long as the Company maintains its status as a REIT, the Company will not be subject to regular federal income tax to the extent that it distributes 100% of its REIT taxable income (including net long-term capital gains) to its stockholders within the permitted timeframe. Should this not occur, the Company would be subject to federal taxes at prevailing corporate tax rates on the difference between its REIT taxable income and the amounts deemed to be distributed for that tax year. As the Company’s objective is to distribute 100% of its REIT taxable income to its stockholders within the permitted timeframe, no provision for current or deferred income taxes has been made in the accompanying consolidated financial statements. Should the Company incur a liability for corporate income tax, such amounts would be recorded as REIT income tax expense on the Company’s consolidated statements of operations. Furthermore, if the Company fails to distribute during each calendar year, or by the end of January following the calendar year in the case of distributions with declaration and record dates falling in the last three months of the calendar year, at least the sum of (i) 85% of its REIT ordinary income for such year, (ii) 95% of its REIT capital gain income for such year, and (iii) any undistributed taxable income from prior periods, the Company would be subject to a 4% nondeductible excise tax on the excess of the required distribution over the amounts actually distributed. To the extent that the Company incurs interest, penalties or related excise taxes in connection with its tax obligations, including as a result of its assessment of uncertain tax positions, such amounts will be included in Operating and Other Expense on the Company’s consolidated statements of operations. In addition, the Company has elected to treat certain of its subsidiaries as TRS. In general, a TRS may hold assets and engage in activities that the Company cannot hold or engage in directly and generally may engage in any real estate or non-real estate-related business. Generally, a domestic TRS is subject to U.S. federal, state and local corporate income taxes. Given that a portion of the Company’s business is conducted through one or more TRS, the net taxable income earned by its domestic TRS, if any, is subject to corporate income taxation. To maintain the Company’s REIT election, no more than 20% of the value of the Company’s assets at the end of each calendar quarter may consist of stock or securities in TRS. For purposes of the determination of U.S. federal and state income taxes, the Company’s subsidiaries that elected to be treated as TRS record current or deferred income taxes based on differences (both permanent and timing) between the determination of their taxable income and net income under GAAP. No net deferred tax benefit was recorded by the Company for the nine months ended September 30, 2021 and 2020, related to the net taxable losses in the TRS, since a valuation allowance for the full amount of the associated deferred tax asset of approximately $43.3 million was recognized as its recovery is not considered more likely than not. The related net operating loss carryforwards generated prior to 2018 will begin to expire in 2034; those generated in 2021, 2020 and 2019 can be carried forward indefinitely, until fully utilized. Based on its analysis of any potentially uncertain tax positions, the Company concluded that it does not have any material uncertain tax positions that meet the relevant recognition or measurement criteria as of September 30, 2021, December 31,
Derivative Financial Instruments	Derivative Financial Instruments The Company may use a variety of derivative instruments to economically hedge a portion of its exposure to market risks, including interest rate risk and prepayment risk. The objective of the Company’s risk management strategy is to reduce fluctuations in net book value over a range of interest rate scenarios. Swaps Historically, the Company’s derivative instruments have generally been comprised of Swaps, the majority of which were designated as cash flow hedges against the interest rate risk associated with its borrowings. The Company documented its risk-management policies, including objectives and strategies, for its hedging activities and the relationship between the hedging instrument and the hedged liability for all Swaps designated as hedging transactions. The Company assessed, both at the inception of a hedge and on a quarterly basis thereafter, whether or not the hedge was “highly effective.” During the first quarter of 2020, the Company terminated all of its Swaps. Prior to their termination, Swaps were carried on the Company’s consolidated balance sheets at fair value, in Other assets, if their fair value was positive, or in Other liabilities, if their fair value was negative. Changes in the fair value of the Company’s Swaps previously designated in hedging transactions were recorded in OCI provided that the hedge remained effective. Periodic payments accrued in connection with Swaps designated as hedges were included in interest expense and treated as an operating cash flow. The Company discontinued hedge accounting for the terminated swaps as it determined that it was no longer probable that the forecasted transactions would occur (see Notes 5(c), 7 and 14). Changes in the fair value of the Company’s Swaps not designated in hedging transactions are recorded in Other income, net on the Company’s consolidated statements of operations. To Be Announced (“TBA”) Securities The Company has entered into transactions to take short positions in TBA securities in connection with the management of interest rate and other market risks associated with purchases of Agency eligible investor loans. As the Company does not intend to physically settle its transactions in TBA securities, they are required to be accounted for as derivative financial instruments. The Company does not apply hedge accounting to its TBA securities. Accordingly, TBA securities are recorded on the Company’s balance sheets at fair value, with realized and unrealized changes in fair value each period recorded in Other income, net in the Company’s consolidated statements of operations.
Fair Value Measurements and the Fair Value Option for Financial Assets and Financial Liabilities	Fair Value Measurements and the Fair Value Option for Financial Assets and Financial Liabilities The Company’s presentation of fair value for its financial assets and liabilities is determined within a framework that stipulates that the fair value of a financial asset or liability is an exchange price in an orderly transaction between market participants to sell the asset or transfer the liability in the market in which the reporting entity would transact for the asset or liability, that is, the principal or most advantageous market for the asset or liability. The transaction to sell the asset or transfer the liability is a hypothetical transaction at the measurement date, considered from the perspective of a market participant that holds the asset or owes the liability. This definition of fair value focuses on exit price and prioritizes the use of market-based inputs over entity-specific inputs when determining fair value. In addition, the framework for measuring fair value establishes a three-level hierarchy for fair value measurements based upon the observability of inputs to the valuation of an asset or liability as of the measurement date.
Variable Interest Entities	Variable Interest Entities An entity is referred to as a VIE if it meets at least one of the following criteria: (i) the entity has equity that is insufficient to permit the entity to finance its activities without the additional subordinated financial support of other parties; or (ii) as a group, the holders of the equity investment at risk lack (a) the power to direct the activities of an entity that most significantly impact the entity’s economic performance; (b) the obligation to absorb the expected losses; or (c) the right to receive the expected residual returns; or (iii) the holders of the equity investment at risk have disproportional voting rights and the entity’s activities are conducted on behalf of the investor that has disproportionately few voting rights. The Company consolidates a VIE when it has both the power to direct the activities that most significantly impact the economic performance of the VIE and a right to receive benefits or absorb losses of the entity that could be potentially significant to the VIE. The Company is required to reconsider its evaluation of whether to consolidate a VIE each reporting period, based upon changes in the facts and circumstances pertaining to the VIE. The Company has entered into several financing transactions which resulted in the Company forming entities to facilitate these transactions. In determining the accounting treatment to be applied to these transactions, the Company concluded that the entities used to facilitate these transactions are VIEs and that they should be consolidated. If the Company had determined that consolidation was not required, it would have then assessed whether the transfers of the underlying assets would qualify as sales or should be accounted for as secured financings under GAAP (see Note 15). The Company also includes on its consolidated balance sheets certain financial assets and liabilities that are acquired/issued by trusts and/or other special purpose entities that have been evaluated as being required to be consolidated by the Company under the applicable accounting guidance.
Offering Costs Related to Issuance and Redemption of Preferred Stock	Offering Costs Related to Issuance and Redemption of Preferred Stock Offering costs related to the issuance of preferred stock are recorded as a reduction in Additional paid-in capital, a component of Stockholders’ Equity, at the time such preferred stock is issued. On redemption of preferred stock, any excess of the fair value of the consideration transferred to the holders of the preferred stock over the carrying amount of the preferred stock in the Company’s consolidated balance sheets is included in the determination of Net Income Available to Common Stock and Participating Securities in the calculation of EPS.
New Accounting Standards and Interpretations	New Accounting Standards and Interpretations Accounting Standards Adopted in 2021 ASU 2020-06 Early Adoption In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40) Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (or ASU 2020-06). ASU 2020-06 was issued in order to reduce the complexity associated with recording financial instruments with characteristics of both liabilities and equity by eliminating certain accounting models associated with such instruments and enhancing disclosure requirements. The Company early adopted ASU 2020-06 in the first quarter of 2021 and it did not have a material impact on the Company’s accounting or disclosures.

Residential Whole Loans (Tables

Residential Whole Loans (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Residential whole loans, at carrying and fair value	The following table presents the components of the Company’s Residential whole loans, and the accounting model designated at September 30, 2021 and December 31, 2020: Held at Carrying Value Held at Fair Value Total (Dollars In Thousands) September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Purchased Performing Loans: Non-QM loans $ 1,683,025 $ 2,357,185 $ 1,152,547 $ — $ 2,835,572 $ 2,357,185 Rehabilitation loans 294,622 581,801 301,602 — 596,224 581,801 Single-family rental loans 368,927 446,374 372,135 — 741,062 446,374 Seasoned performing loans 110,162 136,264 — — 110,162 136,264 Agency eligible investor loans — — 1,126,477 — 1,126,477 — Total Purchased Performing Loans $ 2,456,736 $ 3,521,624 $ 2,952,761 $ — $ 5,409,497 $ 3,521,624 Purchased Credit Deteriorated Loans $ 575,230 $ 673,708 $ — $ — $ 575,230 $ 673,708 Allowance for Credit Losses $ (44,102) $ (86,833) $ — $ — $ (44,102) $ (86,833) Purchased Non-Performing Loans $ — $ — $ 1,140,837 $ 1,216,902 $ 1,140,837 $ 1,216,902 Total Residential Whole Loans $ 2,987,864 $ 4,108,499 $ 4,093,598 $ 1,216,902 $ 7,081,462 $ 5,325,401 Number of loans 10,361 13,112 12,307 5,622 22,668 18,734
Financing receivable credit quality indicators	The following table presents additional information regarding the Company’s Residential whole loans at September 30, 2021 and December 31, 2020: September 30, 2021 Fair Value / Carrying Value Unpaid Principal Balance (“UPB”) Weighted Average Coupon (1) Weighted Average Term to Maturity (Months) Weighted Average LTV Ratio (2) Weighted Average Original FICO (3) Aging by UPB Past Due Days (Dollars In Thousands) Current 30-59 60-89 90+ Purchased Performing Loans: Non-QM loans $ 2,825,883 $ 2,737,998 5.36 % 350 64 % 725 $ 2,526,620 $ 65,991 $ 18,902 $ 126,485 Rehabilitation loans 587,539 594,366 7.27 8 66 726 469,292 17,939 3,432 103,703 Single-family rental loans 739,428 717,552 5.69 330 70 731 690,822 1,834 1,033 23,863 Seasoned performing loans 110,112 120,444 2.86 164 38 722 109,331 1,095 616 9,402 Agency eligible investor loans (4) 963,462 936,748 3.40 356 62 767 933,633 2,818 297 — Total Purchased Performing Loans 5,226,424 $ 5,107,108 5.21 % 304 Purchased Credit Deteriorated Loans $ 551,186 $ 674,367 4.55 % 284 69 % N/A 481,330 50,991 18,857 123,189 Purchased Non-Performing Loans $ 1,140,837 $ 1,137,666 4.88 % 285 74 % N/A $ 517,924 $ 94,139 $ 39,605 $ 485,998 Residential whole loans, total or weighted average $ 6,918,447 $ 6,919,141 5.10 % 299 December 31, 2020 Fair Value / Carrying Value Unpaid Principal Balance (“UPB”) Weighted Average Coupon (1) Weighted Average Term to Maturity (Months) Weighted Average LTV Ratio (2) Weighted Average Original FICO (3) Aging by UPB Past Due Days (Dollars In Thousands) Current 30-59 60-89 90+ Purchased Performing Loans: Non-QM loans $ 2,336,117 $ 2,294,086 5.84 % 351 64 % 712 $ 2,042,405 $ 71,303 $ 35,697 $ 144,681 Rehabilitation loans 563,430 581,801 7.29 3 63 719 390,706 29,315 25,433 136,347 Single-family rental loans 442,456 442,208 6.32 324 70 730 411,377 6,691 3,907 20,233 Seasoned performing loans 136,157 149,004 3.30 171 40 723 136,778 2,248 1,155 8,823 Total Purchased Performing Loans 3,478,160 $ 3,467,099 6.04 % 281 Purchased Credit Deteriorated Loans 630,339 $ 782,319 4.46 % 287 76 N/A 544,803 65,791 26,697 145,028 Purchased Non-Performing Loans 1,216,902 $ 1,282,093 4.87 % 290 80 N/A 497,299 104,993 54,180 625,621 Residential whole loans, total or weighted average $ 5,325,401 $ 5,531,511 5.54 % 284 (1) Weighted average is calculated based on the interest bearing principal balance of each loan within the related category. For loans acquired with servicing rights released by the seller, interest rates included in the calculation do not reflect loan servicing fees. For loans acquired with servicing rights retained by the seller, interest rates included in the calculation are net of servicing fees. (2) LTV represents the ratio of the total unpaid principal balance of the loan to the estimated value of the collateral securing the related loan as of the most recent date available, which may be the origination date. For Rehabilitation loans, the LTV presented is the ratio of the maximum unpaid principal balance of the loan, including unfunded commitments, to the estimated “after repaired” value of the collateral securing the related loan, where available. For certain Rehabilitation loans, totaling $142.7 million and $189.9 million at September 30, 2021 and December 31, 2020, respectively, an after repaired valuation was not obtained and the loan was underwritten based on an “as is” valuation. The weighted average LTV of these loans based on the current unpaid principal balance and the valuation obtained during underwriting, is 70% and 69% at September 30, 2021 and December 31, 2020, respectively. Excluded from the calculation of weighted average LTV are certain low value loans secured by vacant lots, for which the LTV ratio is not meaningful. (3) Excludes loans for which no Fair Isaac Corporation (“FICO”) score is available. (4) Excluded from the table above are approximately $163.0 million of Residential whole loans, at fair value for which the closing of the purchase transaction had not occurred as of September 30, 2021. The following table presents certain additional credit-related information regarding our Residential whole loans, at Carrying Value: Amortized Cost Basis by Origination Year and LTV Bands (Dollars In Thousands) 2021 2020 2019 2018 2017 Prior Total Non-QM loans LTV <= 80% (1) $ 71,860 $ 321,875 $ 770,456 $ 407,943 $ 40,381 $ 4,228 $ 1,616,743 LTV > 80% (1) 4,191 28,369 15,709 14,686 3,177 150 66,282 Total Non-QM loans $ 76,051 $ 350,244 $ 786,165 $ 422,629 $ 43,558 $ 4,378 $ 1,683,025 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ — $ 37 $ — $ — $ 37 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ — $ 37 $ — $ — $ 37 Rehabilitation loans LTV <= 80% (1) $ 13,717 $ 27,910 $ 214,618 $ 31,228 $ 3,427 $ — $ 290,900 LTV > 80% (1) — — 1,226 796 1,700 — 3,722 Total Rehabilitation loans $ 13,717 $ 27,910 $ 215,844 $ 32,024 $ 5,127 $ — $ 294,622 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ 1,059 $ 468 $ 123 $ — $ 1,650 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ 1,059 $ 468 $ 123 $ — $ 1,650 Single family rental loans LTV <= 80% (1) $ 15,502 $ 37,089 $ 208,010 $ 91,783 $ 10,537 $ — $ 362,921 LTV > 80% (1) — 513 5,406 87 — — 6,006 Total Single family rental loans $ 15,502 $ 37,602 $ 213,416 $ 91,870 $ 10,537 $ — $ 368,927 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ 56 $ — $ — $ — $ 56 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ 56 $ — $ — $ — $ 56 Seasoned performing loans LTV <= 80% (1) $ — $ — $ — $ — $ — $ 105,348 $ 105,348 LTV > 80% (1) — — — — — 4,814 4,814 Total Seasoned performing loans $ — $ — $ — $ — $ — $ 110,162 $ 110,162 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ — $ — $ — $ — $ — Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ — $ — $ — $ — $ — Purchased credit deteriorated loans LTV <= 80% (1) $ — $ — $ — $ — $ 621 $ 421,264 $ 421,885 LTV > 80% (1) — — — — — 153,345 153,345 Total Purchased credit deteriorated loans $ — $ — $ — $ — $ 621 $ 574,609 $ 575,230 Nine Months Ended September 30, 2021 Gross write-offs $ — $ — $ — $ — $ — $ 406 $ 406 Nine Months Ended September 30, 2021 Recoveries — — — — — — — Nine Months Ended September 30, 2021 Net write-offs $ — $ — $ — $ — $ — $ 406 $ 406 Total LTV <= 80% (1) $ 101,079 $ 386,874 $ 1,193,084 $ 530,954 $ 54,966 $ 530,840 $ 2,797,797 Total LTV > 80% (1) 4,191 28,882 22,341 15,569 4,877 158,309 234,169 Total residential whole loans, at carrying value $ 105,270 $ 415,756 $ 1,215,425 $ 546,523 $ 59,843 $ 689,149 $ 3,031,966 Total Gross write-offs $ — $ — $ 1,115 $ 505 $ 123 $ 406 $ 2,149 Total Recoveries — — — — — — — Total Net write-offs $ — $ — $ 1,115 $ 505 $ 123 $ 406 $ 2,149 (1) LTV represents the ratio of the total unpaid principal balance of the loan to the estimated value of the collateral securing the related loan as of the most recent date available, which may be the origination date. For Rehabilitation loans, the LTV presented is the ratio of the maximum unpaid principal balance of the loan, including unfunded commitments, to the estimated “after repaired” value of the collateral securing the related loan, where available. For certain Rehabilitation loans, totaling $142.7 million at September 30, 2021, an after repaired valuation was not obtained and the loan was underwritten based on an “as is” valuation. The weighted average LTV of these loans based on the current unpaid principal balance and the valuation obtained during underwriting is 70% at September 30, 2021. Certain low value loans secured by vacant lots are categorized as LTV > 80%. The following tables present certain information regarding the LTVs of the Company’s Residential whole loans that are 90 days or more delinquent: September 30, 2021 (Dollars In Thousands) Carrying Value / Fair Value UPB LTV (1) Residential whole loans, at carrying value Purchased credit deteriorated loans $ 100,905 $ 123,189 79.8 % Non-QM loans $ 121,741 $ 119,572 64.5 % Rehabilitation loans $ 101,012 $ 101,012 68.6 % Single-family rental loans $ 22,767 $ 22,771 73.6 % Seasoned performing loans $ 8,671 $ 9,402 51.3 % Total Residential whole loans, at carrying value $ 355,096 $ 375,946 Residential whole loans, at fair value Purchased non-performing loans $ 484,510 $ 485,998 81.2 % Purchased performing loans $ 10,391 $ 10,696 62.7 % Total Residential whole loans, at fair value $ 494,901 $ 496,694 December 31, 2020 (Dollars In Thousands) Carrying Value / Fair Value UPB LTV (1) Residential whole loans, at carrying value Purchased credit deteriorated loans $ 119,621 $ 145,028 86.7 % Non-QM loans $ 148,387 $ 144,681 65.9 % Rehabilitation loans $ 136,347 $ 136,347 65.8 % Single-family rental loans $ 20,388 $ 20,233 72.7 % Seasoned performing loans $ 8,031 $ 8,823 55.1 % Total Residential whole loans, at carrying value $ 432,774 $ 455,112 Residential whole loans, at fair value Purchased non-performing loans $ 571,729 $ 625,621 86.8 % Purchased performing loans $ — $ — — % Total Residential whole loans, at fair value $ 571,729 $ 625,621 (1) LTV represents the ratio of the total unpaid principal balance of the loan to the estimated value of the collateral securing the related loan as of the most recent date available, which may be the origination date. For Rehabilitation loans, the LTV presented is the ratio of the maximum unpaid principal balance of the loan, including unfunded commitments, to the estimated “after repaired” value of the collateral securing the related loan, where available. For certain Rehabilitation loans, an after repaired valuation was not obtained and the loan was underwritten based on an “as is” valuation. Excluded from the calculation of weighted average LTV are certain low value loans secured by vacant lots, for which the LTV ratio is not meaningful.
Schedule of credit losses	The following table presents a roll-forward of the allowance for credit losses on the Company’s Residential Whole Loans, at Carrying Value: Nine Months Ended September 30, 2021 (Dollars In Thousands) Non-QM Loans Rehabilitation Loans (1)(2) Single-family Rental Loans Seasoned Performing Loans Purchased Credit Deteriorated Loans (3) Totals Allowance for credit losses at December 31, 2020 $ 21,068 $ 18,371 $ 3,918 $ 107 $ 43,369 $ 86,833 Current provision (6,523) (3,700) (1,172) (41) (10,936) (22,372) Write-offs — (1,003) — — (214) (1,217) Allowance for credit losses at March 31, 2021 $ 14,545 $ 13,668 $ 2,746 $ 66 $ 32,219 $ 63,244 Current provision/(reversal) (2,416) (1,809) (386) (9) (3,963) (8,583) Write-offs (37) (255) — — (108) (400) Allowance for credit losses at June 30, 2021 $ 12,092 $ 11,604 $ 2,360 $ 57 $ 28,148 $ 54,261 Current provision/(reversal) (2,403) (2,526) (670) (7) (4,020) (9,626) Write-offs — (393) (56) — (84) (533) Allowance for credit losses at September 30, 2021 $ 9,689 $ 8,685 $ 1,634 $ 50 $ 24,044 $ 44,102 Nine Months Ended September 30, 2020 (Dollars In Thousands) Non-QM Loans Rehabilitation Loans (1)(2) Single-family Rental Loans Seasoned Performing Loans Purchased Credit Deteriorated Loans (3) Totals Allowance for credit losses at December 31, 2019 $ 388 $ 2,331 $ 62 $ — $ 244 $ 3,025 Transition adjustment on adoption of ASU 2016-13 (4) 6,904 517 754 19 62,361 70,555 Current provision 26,358 33,213 6,615 230 8,481 74,897 Write-offs — (428) — — (219) (647) Valuation adjustment on loans held for sale 70,181 — — — — 70,181 Allowance for credit and valuation losses at March 31, 2020 $ 103,831 $ 35,633 $ 7,431 $ 249 $ 70,867 $ 218,011 Current provision/(reversal) (2,297) (5,213) (500) (25) (2,579) (10,614) Write-offs — (420) — — (207) (627) Valuation adjustment on loans held for sale (70,181) — — — — (70,181) Allowance for credit losses at June 30, 2020 $ 31,353 $ 30,000 $ 6,931 $ 224 $ 68,081 $ 136,589 Current provision/(reversal) (4,568) (7,140) (1,906) (74) (16,374) (30,062) Write-offs (32) (227) — — (22) (281) Allowance for credit losses at September 30, 2020 $ 26,753 $ 22,633 $ 5,025 $ 150 $ 51,685 $ 106,246 (1) In connection with purchased Rehabilitation loans at carrying value, the Company had unfunded commitments of $29.2 million and $73.2 million as of September 30, 2021 and 2020, respectively, with an allowance for credit losses of $355,000 and $1.6 million at September 30, 2021 and 2020, respectively. Such allowance is included in “Other liabilities” in the Company’s consolidated balance sheets (see Note 9). (2) Includes $94.9 million and $143.4 million of loans that were assessed for credit losses based on a collateral dependent methodology as of September 30, 2021 and 2020, respectively. (3) Includes $57.4 million and $72.7 million of loans that were assessed for credit losses based on a collateral dependent methodology as of September 30, 2021 and 2020, respectively.
Schedule of interest income components	The following tables present the components of interest income on the Company’s Residential whole loans for the three and nine months ended September 30, 2021 and 2020: Held at Carrying Value Held at Fair Value Total Three Months Ended Three Months Ended Three Months Ended (In Thousands) 2021 2020 2021 2020 2021 2020 Purchased Performing Loans: Non-QM loans $ 17,437 $ 25,884 $ 6,454 $ — $ 23,891 $ 25,884 Rehabilitation loans 5,808 10,863 4,110 — 9,918 10,863 Single-family rental loans 6,074 6,917 3,423 — 9,497 6,917 Seasoned performing loans 1,728 1,945 — — 1,728 1,945 Agency eligible investor loans — — 3,360 — 3,360 — Total Purchased Performing Loans $ 31,047 $ 45,609 $ 17,347 $ — $ 48,394 $ 45,609 Purchased Credit Deteriorated Loans $ 10,504 $ 8,784 $ — $ — $ 10,504 $ 8,784 Purchased Non-Performing Loans $ — $ — $ 20,704 $ 16,555 $ 20,704 $ 16,555 Total Residential Whole Loans $ 41,551 $ 54,393 $ 38,051 $ 16,555 $ 79,602 $ 70,948 Held at Carrying Value Held at Fair Value Total Nine Months Ended Nine Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 2021 2020 Purchased Performing Loans: Non-QM loans $ 59,789 $ 112,212 $ 8,258 $ — $ 68,047 $ 112,212 Rehabilitation loans 19,429 39,502 4,485 — 23,914 39,502 Single-family rental loans 19,594 21,528 3,890 — 23,484 21,528 Seasoned performing loans 5,260 6,799 — — 5,260 6,799 Agency eligible investor loans — — 3,622 — 3,622 — Total Purchased Performing Loans $ 104,072 $ 180,041 $ 20,255 $ — $ 124,327 $ 180,041 Purchased Credit Deteriorated Loans $ 30,097 $ 27,265 $ — $ — $ 30,097 $ 27,265 Purchased Non-Performing Loans $ — $ — $ 58,732 $ 54,513 $ 58,732 $ 54,513 Total Residential Whole Loans $ 134,169 $ 207,306 $ 78,987 $ 54,513 $ 213,156 $ 261,819
Residential whole loans, fair value, component of net gain on residential whole loans	The following table presents the components of Net gain/(loss) on residential whole loans measured at fair value through earnings for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 Net unrealized gains/(losses) $ 20,494 $ 58,863 $ 58,807 $ (13,683) Other Income (1) 1,321 1,453 518 3,601 Total $ 21,815 $ 60,316 $ 59,325 $ (10,082)

Securities, at Fair Value (Tabl

Securities, at Fair Value (Tables)	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of information about MBS and CRT Securities	The following tables present certain information about the Company’s residential mortgage securities at September 30, 2021 and December 31, 2020: September 30, 2021 (In Thousands) Principal/ Current Purchase Accretable Discount Designated as Credit Reserve (1) Gross Amortized Gross Gross Net Fair Total residential mortgage securities (2)(4)(5) $ 102,307 $ 6,163 $ (59) $ (20,768) $ 87,643 $ 17,853 $ (8) $ 17,845 $ 105,488 December 31, 2020 (In Thousands) Principal/ Current Purchase Accretable Discount Designated as Credit Reserve (1) Gross Amortized Gross Gross Net Fair Value Total residential mortgage securities (2)(3)(4)(5) $ 161,878 $ 3,022 $ (8,206) $ (21,437) $ 135,257 $ 26,926 $ (1,183) $ 25,743 $ 161,000 (1) Discount designated as Credit Reserve is generally not expected to be accreted into interest income. (2) Based on management ’ s current estimates of future principal cash flows expected to be received. (3) Includes RPL/NPL MBS, which at December 31, 2020 had a $55.0 million Principal/Current face, $46.9 million amortized cost and $53.9 million fair value. (4) At December 31, 2020, the Company expected to recover approximately 99% of the then-current face amount of Non-Agency MBS. (5) Amounts disclosed at September 30, 2021 includes CRT securities with a fair value of $68.0 million for which the fair value option has been elected. Such securities had $2.2 million gross unrealized gains and gross unrealized losses of approximately
Schedule of Sale of Residential Mortgage Securities	The following table presents information about the Company’s sales of its residential mortgage securities for the three and nine months ended September 30, 2021 and 2020. The Company has no continuing involvement with any of the sold securities. Three Months Ended Three Months Ended (In Thousands) Sales Proceeds Gains/(Losses) Sales Proceeds Gains/(Losses) Agency MBS $ — $ — $ — $ — Non-Agency MBS — — 116 48 CRT Securities — — — — Total $ — $ — $ 116 $ 48 Nine Months Ended Nine Months Ended (In Thousands) Sales Proceeds Gains/(Losses) Sales Proceeds Gains/(Losses) Agency MBS $ — $ — $ 1,500,875 $ (19,291) Non-Agency MBS — — 1,318,958 107,999 CRT Securities — — 243,025 (27,011) Total $ — $ — $ 3,062,858 $ 61,697
Schedule of Credit Losses	The following table presents a roll-forward of the allowance for credit losses on the Company’s Residential mortgage securities and MSR-related assets: Three Months Ended September 30, Nine Months Ended September 30, (Dollars In Thousands) 2021 2020 2021 2020 Allowance for credit losses at beginning of period $ — $ — $ — $ — Current provision: Securities with no prior loss allowance — — — 344,269 Securities with a prior loss allowance — — — — Write-offs, including allowance related to securities the Company intended to sell — — — (344,269) Allowance for credit losses at end of period $ — $ — $ — $ —
Schedule of impact of AFS on AOCI	The following table presents the impact of the Company’s AFS securities on its AOCI for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 AOCI from AFS securities: Unrealized gain on AFS securities at beginning of period $ 66,163 $ 52,889 $ 79,607 $ 392,722 Unrealized (losses)/gains on securities available-for-sale (8,029) 15,082 (21,473) 408,585 Reclassification adjustment for MBS sales included in net income — (60) — (389,127) Reclassification adjustment for impairment included in net income — — — (344,269) Change in AOCI from AFS securities (8,029) 15,022 (21,473) (324,811) Balance at end of period $ 58,134 $ 67,911 $ 58,134 $ 67,911
Schedule of interest income on MBS, CRT Securities and MSR Related Assets	The following table presents the components of interest income on the Company’s Securities, at fair value for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Agency MBS Coupon interest $ — $ — $ — $ 14,038 Effective yield adjustment (1) — — — (5,186) Interest income $ — $ — $ — $ 8,852 Legacy Non-Agency MBS Coupon interest $ — $ 42 $ 14 $ 18,222 Effective yield adjustment (2)(3) — 6 670 10,564 Interest income $ — $ 48 $ 684 $ 28,786 RPL/NPL MBS Coupon interest $ — $ 811 $ 373 $ 7,622 Effective yield adjustment (1)(4) — 94 8,136 449 Interest income $ — $ 905 $ 8,509 $ 8,071 CRT securities Coupon interest $ 931 $ 956 $ 2,774 $ 6,063 Effective yield adjustment (2) 1,364 420 3,152 (94) Interest income $ 2,295 $ 1,376 $ 5,926 $ 5,969 MSR-related assets Coupon interest $ 1,595 $ 2,991 $ 6,044 $ 23,332 Effective yield adjustment (1)(2)(5) 6,739 3,250 21,270 6,857 Interest income $ 8,334 $ 6,241 $ 27,314 $ 30,189 (1) Includes amortization of premium paid net of accretion of purchase discount. For Agency MBS, RPL/NPL MBS and the corporate loan secured by MSRs, interest income is recorded at an effective yield, which reflects net premium amortization/accretion based on actual prepayment activity. (2) The effective yield adjustment is the difference between the net income calculated using the net yield less the current coupon yield. The net yield may be based on management’s estimates of the amount and timing of future cash flows or in the instrument’s contractual cash flows, depending on the relevant accounting standards. (3) Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously purchased at a discount of approximately $670,000 during the nine months ended September 30, 2021. (4) Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously purchased at a discount of approximately $8.1 million and $277,000 during the nine months ended September 30, 2021 and 2020, respectively.

Other Assets (Tables)

Other Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Other Assets [Abstract]
Schedule of other assets	The following table presents the components of the Company’s Other assets at September 30, 2021 and December 31, 2020: (In Thousands) September 30, 2021 December 31, 2020 REO (1) $ 178,802 $ 249,699 Capital contributions made to loan origination partners 53,537 47,148 Goodwill 61,615 — Intangibles, net (2) 24,700 — Other interest-earning assets 35,437 — Interest receivable 41,432 38,850 Other loan related receivables 45,242 16,682 Lease right-of-use asset (3) 39,500 758 Other 61,338 32,244 Total Other Assets $ 541,603 $ 385,381 (1) Includes $16.1 million and $61.8 million of REO that is held-for-investment at September 30, 2021 and December 31, 2020, respectively. (2) Net of aggregate accumulated amortization of $3.3 million as of September 30, 2021. (3) An estimated incremental borrowing rate of 7.5% was used in connection with the Company’s primary operating lease (see Notes 2 and 10).
Schedule of activity for real estate owned	The following table presents the activity in the Company’s REO for the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 204,762 $ 348,516 $ 249,699 $ 411,659 Adjustments to record at lower of cost or fair value (2,448) 93 (3,390) (11,796) Transfer from residential whole loans (1) 11,673 15,672 50,043 74,891 Purchases and capital improvements, net 1,584 771 2,207 10,072 Disposals and other (2) (36,769) (66,185) (119,757) (185,959) Balance at end of period $ 178,802 $ 298,867 $ 178,802 $ 298,867 Number of properties 674 1,131 674 1,131 (1) Includes a net gain recorded on transfer of approximately $700,000 and $834,000 for the three months ended September 30, 2021 and 2020, respectively; and a net loss recorded on transfer of approximately $400,000 and a net gain recorded on transfer of approximately $4.1 million for the nine months ended September 30, 2021 and 2020, respectively.
Schedule of interest expense and the weighted average interest rate paid and received on swaps	The following table presents the net impact of the Company’s derivative hedging instruments on its net interest expense and the weighted average interest rate paid and received for such Swaps for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (Dollars in Thousands) 2021 2020 2021 2020 Interest (expense)/income attributable to Swaps $ — $ — $ — $ (3,359) Weighted average Swap rate paid — % — % — % 2.06 % Weighted average Swap rate received — % — % — % 1.63 %
Schedule of impact of hedging instruments on AOCI	The following table presents the impact of the Company’s derivative hedging instruments on its AOCI for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 AOCI from derivative hedging instruments: Balance at beginning of period $ — $ (7,176) $ — $ (22,675) Net loss on Swaps — — — (50,127) Reclassification adjustment for losses/gains related to hedging instruments included in net income — 7,176 — 72,802 Balance at end of period $ — $ — $ — $ —
Summary of open short positions in TBA securities	The table below summarizes open short positions in TBA securities as of September 30, 2021, which had an aggregate value of $5.4 million. TBA Security Notional Amount Settlement Date (In Thousands) FNCL 2.0 10/21 $ 420,000 October 14, 2021 FNCL 2.5 10/21 $ 330,000 October 14, 2021

Financing Agreements (Tables)

Financing Agreements (Tables)	9 Months Ended
	Sep. 30, 2021
Disclosure of Repurchase Agreements [Abstract]
Financing agreements	The following tables present the components of the Company’s Financing agreements at September 30, 2021 and December 31, 2020: September 30, 2021 (In Thousands) Unpaid Principal Balance Amortized Cost Balance Fair Value/Carrying Value (1) Financing agreements, at fair value Agreements with mark-to-market collateral provisions $ 1,275,172 $ 1,275,172 $ 1,275,172 Agreements with non-mark-to-market collateral provisions 689,205 689,205 690,583 Securitized debt 527,160 527,154 530,829 Total Financing agreements, at fair value $ 2,491,537 $ 2,491,531 $ 2,496,584 Financing agreements, at carrying value Securitized debt $ 1,522,354 $ 1,514,900 Agreements with mark-to-market collateral provisions 1,155,964 1,155,820 Agreements with non-mark-to-market collateral provisions 157,784 157,366 Convertible senior notes 230,000 226,138 Total Financing agreements, at carrying value $ 3,066,102 $ 3,054,224 Total Financing agreements $ 5,557,639 $ 5,550,808 December 31, 2020 (In Thousands) Unpaid Principal Balance Amortized Cost Balance Fair Value/Carrying Value (1) Financing agreements, at fair value Agreements with non-mark-to-market collateral provisions $ 1,156,899 $ 1,156,899 $ 1,159,213 Agreements with mark-to-market collateral provisions 1,338,077 1,338,077 1,338,077 Securitized debt 866,203 857,553 869,482 Total Financing agreements, at fair value $ 3,361,179 $ 3,352,529 $ 3,366,772 Financing agreements, at carrying value Securitized debt $ 648,300 $ 645,027 Convertible senior notes 230,000 225,177 Senior notes 100,000 100,000 Total Financing agreements, at carrying value $ 978,300 $ 970,204 Total Financing agreements $ 4,339,479 $ 4,336,976 (1) Financing agreements at fair value are reported at estimated fair value each period as a result of the Company’s fair value option election. Other financing arrangements are reported at their carrying value (amortized cost basis) as the fair value option was not elected on these liabilities. Consequently, Total Financing agreements as presented reflects a summation of balances reported at fair value and carrying value.
Financing agreements with non-mark-to-market collateral provisions and associated assets pledged as collateral	The following table presents information with respect to the Company’s financing agreements, at fair value with non-mark-to-market collateral provisions and associated assets pledged as collateral at September 30, 2021 and December 31, 2020: (Dollars in Thousands) September 30, December 31, Non-mark-to-market financing secured by residential whole loans $ 681,567 $ 1,156,125 Fair value of residential whole loans pledged as collateral under financing agreements $ 1,191,747 $ 1,930,283 Weighted average haircut on residential whole loans 42.03 % 39.46 % Non-mark-to-market financing secured by real estate owned $ 9,016 $ 3,088 Fair value of real estate owned pledged as collateral under financing agreements $ 23,296 $ 7,441 Weighted average haircut on real estate owned 61.09 % 59.73 %
Financing agreements with mark-to-market collateral provisions and associated assets pledged as collateral	The following table presents information with respect to the Company’s financing agreements, at fair value with mark-to-market collateral provisions and associated assets pledged as collateral at September 30, 2021 and December 31, 2020: (Dollars in Thousands) September 30, December 31, Mark-to-market financing agreements secured by residential whole loans $ 1,262,811 $ 1,113,553 Fair value of residential whole loans pledged as collateral under financing agreements (1) $ 1,910,051 $ 1,798,813 Weighted average haircut on residential whole loans (2) 31.84 % 34.17 % Mark-to-market financing agreements secured by securities at fair value $ — $ 213,915 Securities at fair value pledged as collateral under financing agreements $ — $ 399,999 Weighted average haircut on securities at fair value (2) — % 41.16 % Mark-to-market financing agreements secured by real estate owned $ 12,361 $ 10,609 Fair value of real estate owned pledged as collateral under financing agreements $ 38,388 $ 22,525 Weighted average haircut on real estate owned (2) 61.22 % 55.56 % (1) At December 31, 2020, includes Non-Agency MBS with an aggregate fair value of $141.9 million obtained in connection with the Company’s loan securitization transactions that are eliminated in consolidation.
Schedule of repricing information about borrowings under financing agreements	The following table presents repricing information (excluding the impact of associated derivative hedging instruments, if any) about the Company’s financing agreements, at fair value that have non-mark-to-market collateral provisions as well as those that have mark-to-market collateral provisions, at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Amortized Cost Basis Weighted Average Interest Rate Amortized Cost Basis Weighted Average Interest Rate Time Until Interest Rate Reset (Dollars in Thousands) Within 30 days $ 1,964,377 2.55 % $ 2,494,976 3.16 % Over 30 days to 3 months — — — — Over 3 months to 12 months — — — — Over 12 months — — — — Total financing agreements $ 1,964,377 2.55 % $ 2,494,976 3.16 % The following table presents repricing information (excluding the impact of associated derivative hedging instruments, if any) about the Company’s financing agreements, at carrying value that have non-mark-to-market collateral provisions as well as those that have mark-to-market collateral provisions, for which the fair value option was not elected, at September 30, 2021 and December 31, 2020: September 30, 2021 Amortized Cost Basis Weighted Average Interest Rate Time Until Interest Rate Reset (Dollars in Thousands) Within 30 days $ 1,259,588 1.90 % Over 30 days to 3 months 36,141 4.30 Over 3 months to 12 months 18,018 4.50 Over 12 months — — Total financing agreements $ 1,313,747 2.00 %
Schedule of Company's borrowings under financing agreements and associated assets pledged as collateral	The following table presents information with respect to the Company’s financing agreements, at carrying value with non-mark-to-market collateral provisions, for which the fair value option was not elected, and associated assets pledged as collateral at September 30, 2021 (none were outstanding at December 31, 2020): (Dollars in Thousands) September 30, Non-mark-to-market financing agreements secured by residential whole loans $ 157,366 Fair value of residential whole loans pledged as collateral under financing agreements $ 182,316 Weighted average haircut on residential whole loans (1) 13.00 % (1) Haircut represents the percentage amount by which the collateral value is contractually required to exceed the loan amount. The following table presents information with respect to the Company’s financing agreements, at carrying value with mark-to-market collateral provisions, for which the fair value option was not elected, and associated assets pledged as collateral at September 30, 2021 (none were outstanding at December 31, 2020): (Dollars in Thousands) September 30, Mark-to-market financing agreements secured by residential whole loans $ 984,016 Fair value of residential whole loans pledged as collateral under financing agreements $ 1,161,100 Weighted average haircut on residential whole loans (1) 15.21 % Mark-to-market financing agreements secured by securities at fair value $ 171,804 Securities at fair value pledged as collateral under financing agreements $ 283,037 Weighted average haircut on securities at fair value (1) 38.33 %
Schedule of information about counterparty for financing agreements for which the entity had greater than 5% of stockholders' equity at risk	The following table presents information with respect to each counterparty under financing agreements for which the Company had greater than 5% of stockholders’ equity at risk in the aggregate at September 30, 2021: September 30, 2021 Counterparty Rating (1) Amount at Risk (2) Weighted Percent of Counterparty (Dollars in Thousands) Barclays Bank (3) BBB/Aa3/A $ 527,745 1 20.3 % Credit Suisse BBB+/Baa1/A- 420,704 1 16.2 Wells Fargo A+/Aa2/AA- 296,559 1 11.4 (1) As rated at September 30, 2021 by S&P, Moody’s and Fitch, Inc., respectively. The counterparty rating presented is the lowest published rating for these entities. (2) The amount at risk reflects the difference between (a) the amount loaned to the Company through financing agreements, including interest payable, and (b) the cash and the fair value of the securities pledged by the Company as collateral, including accrued interest receivable on such securities. (3) Includes amounts at risk with various affiliates of Athene Holding, Ltd., held via participation in a loan syndication administered by Barclays Bank.
Schedule of Company's assets (based on carrying value) pledged as collateral for its various financing arrangements	The following tables present the Company’s assets (based on carrying value) pledged as collateral for its various financing arrangements as of September 30, 2021 and December 31, 2020: September 30, 2021 Financing Agreements (In Thousands) Non-Mark-to-Market Mark-to-Market Securitized Total Assets: Residential whole loans, at carrying value $ 794,267 $ 533,633 $ 1,679,702 $ 3,007,602 Residential whole loans, at fair value 555,738 2,499,284 650,507 3,705,529 Securities, at fair value — 222,705 — 222,705 Other assets: REO 19,919 32,363 36,053 88,335 Total $ 1,369,924 $ 3,287,985 $ 2,366,262 $ 7,024,171 December 31, 2020 Financing Agreements (In Thousands) Non-Mark-to-Market Mark-to-Market Securitized Total Assets: Residential whole loans, at carrying value $ 1,497,281 $ 1,207,364 $ 1,436,316 $ 4,140,961 Residential whole loans, at fair value 430,183 396,817 382,349 1,209,349 Securities, at fair value — 442,773 — 442,773 Other assets: REO — — 49,477 49,477 Total $ 1,927,464 $ 2,046,954 $ 1,868,142 $ 5,842,560

Other Liabilities (Tables)

Other Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Other Liabilities [Abstract]
Other Liabilities	The following table presents the components of the Company’s Other liabilities at September 30, 2021 and December 31, 2020: (In Thousands) September 30, 2021 December 31, 2020 Payable for unsettled residential whole loans purchases $ 163,015 $ — Dividends and dividend equivalents payable 44,247 34,016 Lease liability 44,284 636 Accrued interest payable 11,174 11,116 Accrued expenses and other 73,235 24,754 Total Other Liabilities $ 335,955 $ 70,522

Commitment and Contingencies (T

Commitment and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Lessee, Operating Lease, Liability, Maturity	At September 30, 2021, the contractual minimum rental payments (exclusive of possible rent escalation charges and normal recurring charges for maintenance, insurance and taxes) were as follows: Year Ended December 31, Minimum Rental Payments (In Thousands) 2021 (1) $ 465 2022 5,220 2023 5,236 2024 5,230 2025 4,638 Thereafter 54,156 Total $ 74,945 (1) Reflects contractual minimum rental payments due for the period from October 1, 2021 through December 31, 2021.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2021
Stockholders' Equity Note [Abstract]
Schedule of Preferred Stock Dividend Declaration and Payment	The following table presents cash dividends declared by the Company on its Series B Preferred Stock from January 1, 2021 through September 30, 2021: Declaration Date Record Date Payment Date Dividend Per Share August 26, 2021 September 8, 2021 September 30, 2021 $0.46875 May 24, 2021 June 7, 2021 June 30, 2021 $0.46875 February 19, 2021 March 5, 2021 March 31, 2021 $0.46875 The following table presents cash dividends declared by the Company on its Series C Preferred Stock from January 1, 2021 through September 30, 2021: Declaration Date Record Date Payment Date Dividend Per Share August 26, 2021 September 8, 2021 September 30, 2021 $0.40625 May 24, 2021 June 7, 2021 June 30, 2021 $0.40625 February 19, 2021 March 5, 2021 March 31, 2021 $0.40625
Schedule of Common Stock Dividend Declaration and Payment	The following table presents cash dividends declared by the Company on its common stock from January 1, 2021 through September 30, 2021: Declaration Date Record Date Payment Date Dividend Per Share September 15, 2021 September 30, 2021 October 29, 2021 $0.100 (1) June 15, 2021 June 30, 2021 July 30, 2021 $0.100 March 12, 2021 March 31, 2021 April 30, 2021 $0.075
Schedule of changes in balances of each component of the entity's AOCI	The following table presents changes in the balances of each component of the Company’s AOCI for the three and nine months ended September 30, 2021: Three Months Ended Nine Months Ended (In Thousands) Net Unrealized Net Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Net Unrealized Net Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Balance at beginning of period $ 66,163 $ — $ (1,588) $ 64,575 $ 79,607 $ — $ (2,314) $ 77,293 OCI before reclassifications (8,029) — 209 (7,820) (21,473) — 935 (20,538) Amounts reclassified from AOCI (1) — — — — — — — — Net OCI during the period (2) (8,029) — 209 (7,820) (21,473) — 935 (20,538) Balance at end of period $ 58,134 $ — $ (1,379) $ 56,755 $ 58,134 $ — $ (1,379) $ 56,755 (1) See separate table below for details about these reclassifications. (2) For further information regarding changes in OCI, see the Company’s consolidated statements of comprehensive income/(loss). (3) Net Unrealized Gain/(Loss) on Financing Agreements at Fair Value due to changes in instrument-specific credit risk. The following table presents changes in the balances of each component of the Company’s AOCI for the three and nine months ended September 30, 2020: Three Months Ended Nine Months Ended (In Thousands) Net Unrealized Net Gain/(Loss) on Swaps Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Net Unrealized Net Net Unrealized Gain/(Loss) on Financing Agreements (3) Total Balance at beginning of period $ 52,889 $ (7,176) $ — $ 45,713 $ 392,722 $ (22,675) $ — $ 370,047 OCI before reclassifications 15,082 — (22,652) (7,570) 408,585 (50,127) (22,652) 335,806 Amounts reclassified from AOCI (1) (60) 7,176 — 7,116 (733,396) 72,802 — (660,594) Net OCI during the period (2) 15,022 7,176 (22,652) (454) (324,811) 22,675 (22,652) (324,788) Balance at end of period $ 67,911 $ — $ (22,652) $ 45,259 $ 67,911 $ — $ (22,652) $ 45,259 (1) See separate table below for details about these reclassifications. (2) For further information regarding changes in OCI, see the Company’s consolidated statements of comprehensive income/(loss). (3) Net Unrealized Gain/(Loss) on Financing Agreements at Fair Value due to changes in instrument-specific credit risk.
Information about the significant amounts reclassified out of the entity's AOCI	The following table presents information about the significant amounts reclassified out of the Company’s AOCI for the three and nine months ended September 30, 2021: Three Months Ended Nine Months Ended Details about AOCI Components Amounts Reclassified from AOCI Affected Line Item in the Statement (In Thousands) AFS Securities: Realized gain on sale of securities $ — $ — Net realized gain/(loss) on sales of securities and residential whole loans Impairment recognized in earnings — — Other, net Total AFS Securities $ — $ — Total reclassifications for period $ — $ — The following table presents information about the significant amounts reclassified out of the Company’s AOCI for the three and nine months ended September 30, 2020: Three Months Ended Nine Months Ended Details about AOCI Components Amounts Reclassified from AOCI Affected Line Item in the Statement (In Thousands) AFS Securities: Realized gain on sale of securities $ (60) $ (389,127) Net realized gain/(loss) on sales of securities and residential whole loans Impairment recognized in earnings — (344,269) Other, net Total AFS Securities $ (60) $ (733,396) Swaps designated as cash flow hedges: Amortization of de-designated hedging instruments 7,176 72,802 Other, net Total Swaps designated as cash flow hedges 7,176 72,802 Total reclassifications for period $ 7,116 $ (660,594)

EPS Calculation (Tables)

EPS Calculation (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of reconciliation of the earnings and shares used in calculating basic and diluted EPS	The following table presents a reconciliation of the earnings/(loss) and shares used in calculating basic and diluted earnings/(loss) per share for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands, Except Per Share Amounts) 2021 2020 2021 2020 Basic Earnings/(Loss) per Share: Net income/(loss) to common stockholders $ 132,511 $ 87,210 $ 284,747 $ (725,207) Dividends declared on preferred stock (8,218) (8,219) (24,656) (21,578) Dividends, dividend equivalents and undistributed earnings allocated to participating securities (435) (325) (915) (91) Net income/(loss) to common stockholders - basic $ 123,858 $ 78,666 $ 259,176 $ (746,876) Basic weighted average common shares outstanding 440,889 453,323 444,481 453,170 Basic Earnings/(Loss) per Share $ 0.28 $ 0.17 $ 0.58 $ (1.65) Diluted Earnings/(Loss) per Share: Net income/(loss) to common stockholders - basic $ 123,858 $ 78,666 $ 259,176 $ (746,876) Interest expense on Convertible Senior Notes 3,920 3,898 11,743 — Dividends, dividend equivalents and undistributed earnings allocated to participating securities 435 — 915 — Net income/(loss) to common stockholders - diluted $ 128,213 $ 82,564 $ 271,834 $ (746,876) Basic weighted average common shares outstanding 440,889 453,323 444,481 453,170 Effect of assumed conversion of Convertible Senior Notes to common shares 28,920 28,920 28,920 — Unvested and vested restricted stock units 3,377 — 1,623 — Effect of Warrants — 11,297 — — Diluted weighted average common shares outstanding (1) 473,186 493,540 475,024 453,170 Diluted Earnings/(Loss) per Share $ 0.27 $ 0.17 $ 0.57 $ (1.65)

Equity Compensation and Other_2

Equity Compensation and Other Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2021
Compensation Related Costs [Abstract]
Schedule of expenses related to equity-based compensation	The following table presents the Company’s expenses related to its equity-based compensation instruments for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 RSUs $ 2,306 $ 2,267 $ 6,738 $ 5,094 Total $ 2,306 $ 2,267 $ 6,738 $ 5,094
Schedule of expenses related to deferred compensation plans	The following table presents the Company’s expenses related to its Deferred Plans for the three and nine months ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (In Thousands) 2021 2020 2021 2020 Non-employee directors $ 43 $ 75 $ 488 $ (1,483) Total $ 43 $ 75 $ 488 $ (1,483)
Schedule of aggregate income deferred by participants and associated liability under deferred compensation plans	The following table presents the aggregate amount of income deferred by participants of the Deferred Plans through September 30, 2021 and December 31, 2020 that had not been distributed and the Company’s associated liability for such deferrals at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (In Thousands) Undistributed Income Deferred (1) Liability Under Deferred Plans Undistributed Income Deferred (1) Liability Under Deferred Plans Non-employee directors $ 2,564 $ 2,664 $ 2,197 $ 1,809 Total $ 2,564 $ 2,664 $ 2,197 $ 1,809 (1) Represents the cumulative amounts that were deferred by participants through September 30, 2021 and December 31, 2020, which had not been distributed through such respective date.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of fair value measurement inputs and valuation techniques	The following tables present the Company’s financial instruments carried at fair value on a recurring basis as of September 30, 2021 and December 31, 2020, on the consolidated balance sheets by the valuation hierarchy, as previously described: Fair Value at September 30, 2021 (In Thousands) Level 1 Level 2 Level 3 Total Assets: Residential whole loans, at fair value $ — $ — $ 4,093,598 $ 4,093,598 Securities, at fair value — 283,037 — 283,037 Total assets carried at fair value $ — $ 283,037 $ 4,093,598 $ 4,376,635 Liabilities: Agreements with non-mark-to-market collateral provisions $ — $ — $ 690,583 $ 690,583 Agreements with mark-to-market collateral provisions — — 1,275,172 1,275,172 Securitized debt — 530,829 — 530,829 Total liabilities carried at fair value $ — $ 530,829 $ 1,965,755 $ 2,496,584 Fair Value at December 31, 2020 (In Thousands) Level 1 Level 2 Level 3 Total Assets: Residential whole loans, at fair value $ — $ — $ 1,216,902 $ 1,216,902 Securities, at fair value — 399,999 — 399,999 Total assets carried at fair value $ — $ 399,999 $ 1,216,902 $ 1,616,901 Liabilities: Agreements with non-mark-to-market collateral provisions $ — $ — $ 1,159,213 $ 1,159,213 Agreements with mark-to-market collateral provisions — 213,915 1,124,162 1,338,077 Securitized debt — 869,482 — 869,482 Total liabilities carried at fair value $ — $ 1,083,397 $ 2,283,375 $ 3,366,772 The following tables present a summary of quantitative information about the significant unobservable inputs used in the fair value measurement of the Company’s residential whole loans held at fair value for which it has utilized Level 3 inputs to determine fair value as of September 30, 2021 and December 31, 2020: September 30, 2021 (Dollars in Thousands) Fair Value (1) Valuation Technique Unobservable Input Weighted Average (2) Range Purchased Non-Performing Loans $ 774,666 Discounted cash flow Discount rate 3.4 % 2.5 - 11.5% Prepayment rate 12.2 % 0.0 - 43.8% Default rate 4.0 % 0.0 - 31.3% Loss severity 11.8 % 0.0 - 100.0% $ 365,077 Liquidation model Discount rate 8.1 % 6.7 - 50.0% Annual change in home prices 9.3 % 4.6 - 27.3% Liquidation timeline (in years) 1.7 0.1 - 4.8 Current value of underlying properties (3) $ 788 $10 - $3,995 Total $ 1,139,743 December 31, 2020 (Dollars in Thousands) Fair Value (1) Valuation Technique Unobservable Input Weighted Average (2) Range Purchased Non-Performing Loans $ 789,576 Discounted cash flow Discount rate 3.9 % 3.3 - 8.0% Prepayment rate 5.4 % 0.0 - 17.6% Default rate 4.1 % 0.0 - 47.7% Loss severity 12.7 % 0.0 - 100.0% $ 427,061 Liquidation model Discount rate 8.1 % 6.7 - 50.0% Annual change in home prices 3.6 % 1.8 - 6.5% Liquidation timeline (in years) 1.8 0.8 - 4.8 Current value of underlying properties (3) $ 729 $12 - $4,500 Total $ 1,216,637 (1) Excludes approximately $1.1 million and $265,000 of loans for which management considers the purchase price continues to reflect the fair value of such loans at September 30, 2021 and December 31, 2020, respectively. (2) Amounts are weighted based on the fair value of the underlying loan. (3) The simple average value of the properties underlying residential whole loans held at fair value valued via a liquidation model was approximately $432,000 and $380,000 as of September 30, 2021 and December 31, 2020, respectively. September 30, 2021 (Dollars in Thousands) Fair Value (1) Valuation Technique Unobservable Input Weighted Average (2) Range Purchased Performing Loans $ 2,780,698 Discounted cash flow Discount rate 3.3 % 0.9-50.5% Prepayment rate 18.4 % 0.0-50.1% Default rate 0.3 % 0.0-21.8% Loss severity 8.9 % 0.0-10.0% $ 9,814 Liquidation model Discount rate 7.0 % 7.0-7.0% Annual change in home prices 7.8 % 0.0-12.4% Liquidation timeline (in years) 2.2 1.0-4.4 Current value of underlying properties $ 884 $50-$2,075 Total $ 2,790,512 (1) Excludes approximately $162.2 million of loans for which management considers the purchase price continues to reflect the fair value of such loans at September 30, 2021. (2) Amounts are weighted based on the fair value of the underlying loan.
Schedule of significant unobservable inputs used in fair value measurement of residential whole loans	The following table presents additional information for the three and nine months ended September 30, 2021 and 2020 about the Company’s Residential whole loans, at fair value, which are classified as Level 3 and measured at fair value on a recurring basis: Residential Whole Loans, at Fair Value Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 2,003,580 $ 1,200,981 $ 1,216,902 $ 1,381,583 Purchases and originations 1,968,079 — 2,805,939 — Draws 11,152 — 11,575 — Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings 20,494 58,863 58,807 (13,683) Repayments (65,985) (21,721) (130,488) (65,934) Sales and repurchases 241 (929) 671 (19,460) Transfer to REO (6,978) (7,530) (32,823) (52,842) Balance at end of period $ 3,930,583 $ 1,229,664 $ 3,930,583 $ 1,229,664 (1) Excluded from the table above are approximately $163.0 million of Residential whole loans, at fair value for which the closing of the purchase transaction had not occurred as of September 30, 2021. The following table presents additional information for the three and nine months ended September 30, 2021 and 2020 about the Company’s financing agreements with non-mark-to-market collateral provisions, which are classified as Level 3 and measured at fair value on a recurring basis: Agreements with Non-mark-to-market Collateral Provisions Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 795,341 $ — $ 1,159,213 $ — Issuances — 2,036,597 — 2,036,597 Payment of principal (104,549) (312,638) (467,695) (312,638) Changes in unrealized losses (209) 3,448 (935) 3,448 Balance at end of period $ 690,583 $ 1,727,407 $ 690,583 $ 1,727,407 The following table presents additional information for the three and nine months ended September 30, 2021 and 2020 about the Company’s financing agreements with mark-to-market collateral provisions, which are classified as Level 3 and measured at fair value on a recurring basis: Agreements with Mark-to-market Collateral Provisions Three Months Ended September 30, Nine Months Ended September 30, (In Thousands) 2021 2020 2021 2020 Balance at beginning of period $ 858,066 $ — $ 1,124,162 $ — Issuances 597,761 1,386,592 989,407 1,386,592 Payment of principal (180,655) (156,032) (838,397) (156,032) Changes in unrealized losses — 1,174 — 1,174 Balance at end of period $ 1,275,172 $ 1,231,734 $ 1,275,172 $ 1,231,734
Schedule of carrying value and fair value of financial instruments	The following table presents the carrying values and estimated fair values of the Company’s financial instruments at September 30, 2021 and December 31, 2020: September 30, 2021 September 30, 2021 December 31, 2020 Level in Fair Value Hierarchy Carrying Estimated Fair Value Carrying Estimated Fair Value (In Thousands) Financial Assets: Residential whole loans 3 $ 7,081,462 $ 7,280,297 $ 5,325,401 $ 5,499,303 Securities, at fair value 2 283,037 283,037 399,999 399,999 Cash and cash equivalents 1 526,241 526,241 814,354 814,354 Restricted cash 1 55,507 55,507 7,165 7,165 Financial Liabilities (1) : Financing agreements with non-mark-to-market collateral provisions 3 847,949 848,367 1,159,213 1,159,213 Financing agreements with mark-to-market collateral provisions 3 2,259,188 2,259,332 1,124,162 1,124,162 Financing agreements with mark-to-market collateral provisions 2 171,804 171,804 213,915 213,915 Securitized debt (2) 2 2,045,729 2,053,714 1,514,509 1,519,567 Convertible senior notes 2 226,138 234,328 225,177 228,287 Senior notes (3) 1 — — 100,000 100,031 (1) Carrying value of securitized debt, Convertible Senior Notes, Senior Notes and certain repurchase agreements is net of associated debt issuance costs. (2) Includes Securitized debt that is carried at amortized cost basis and fair value.

Use of Special Purpose Entiti_2

Use of Special Purpose Entities and Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2021
Use of Special Purpose Entities and Variable Interest Entities
Summary of key details related to securitization transactions	The following table summarizes the key details of the Company’s loan securitization transactions currently outstanding as of September 30, 2021 and December 31, 2020: (Dollars in Thousands) September 30, 2021 December 31, 2020 Aggregate unpaid principal balance of residential whole loans sold $ 3,047,295 $ 2,232,561 Face amount of Senior Bonds issued by the VIE and purchased by third-party investors $ 2,788,383 $ 1,862,068 Outstanding amount of Senior Bonds, at carrying value $ 1,514,900 (1) $ 645,027 (1) Outstanding amount of Senior Bonds, at fair value $ 530,829 $ 869,482 Outstanding amount of Senior Bonds, total $ 2,045,729 $ 1,514,509 Weighted average fixed rate for Senior Bonds issued 1.55 % (2) 2.11 % (2) Weighted average contractual maturity of Senior Bonds 41 years (2) 41 years (2) Face amount of Senior Support Certificates received by the Company (3) $ 227,167 $ 268,548 Cash received $ 2,788,354 $ 1,853,408 (1) Net of $7.7 million and $3.2 million of deferred financing costs at September 30, 2021 and December 31, 2020, respectively. (2) At September 30, 2021 and December 31, 2020, $387.6 million and $568.7 million, respectively, of Senior Bonds sold in securitization transactions contained a contractual coupon step-up feature whereby the coupon increases by either 100 or 300 basis points or more at 36 months from issuance if the bond is not redeemed before such date. (3) Provides credit support to the Senior Bonds sold to third-party investors in the securitization transactions.

Acquisition of Lima One Holdi_2

Acquisition of Lima One Holdings, LLC (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Purchase Price Allocations	The purchase price allocations are summarized in the table below: Purchase Price Allocation (In Thousands) Acquisition Date July 1, 2021 Purchase Price: Cash $ 57,255 Equity method investment at fair value 44,465 Total consideration $ 101,720 Allocated to: Business purpose residential loans, at fair value $ 170,220 Cash and cash equivalents 16,531 Restricted cash 91,394 Other assets 36,864 Goodwill 61,615 Intangible assets 28,000 Total assets acquired $ 404,624 Short term debt, net $ (170,908) Accrued expenses and other liabilities (84,620) Total liabilities assumed $ (255,528) Preferred equity repaid at closing (47,376) Total net assets acquired $ 101,720
Finite-lived Intangible Assets Amortization Expense	The amortization period for each of the finite lived intangible assets and the activity for the three months ended September 31, 2021 is summarized in the table below: (Dollars in Thousands) Acquisition Date July 1, 2021 Amortization Three Months Ended September 30, 2021 Carrying Value at September 30, 2021 Amortization Period (Years) (1) Trademarks / Trade Names $ 4,000 $ (100) $ 3,900 10 Customer Relationships 16,000 (2,000) 14,000 4 Internally Developed Software 4,000 (200) 3,800 5 Non-Compete Agreements 4,000 (1,000) 3,000 1 Total Identified Intangibles $ 28,000 $ (3,300) $ 24,700

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Basis of Presentation and Consolidation) (Details)	9 Months Ended
	Sep. 30, 2021segment
Accounting Policies [Abstract]
Number of reportable segments	1
Number of operating segments	1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Residential Whole Loans) (Details)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Number of days considered to classify loans delinquent	60 days
Weighted Average LTV Ratio	80.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash and cash equivalents	$ 526,241	$ 814,354
Overnight money market funds	461,700	752,400
Restricted cash	$ 55,507	$ 7,165

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (Goodwill) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Jul. 01, 2021	Dec. 31, 2020
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	$ 61,615		$ 0
Intangible assets, net	$ 24,700		$ 0
Minimum
Business Combination, Separately Recognized Transactions [Line Items]
Expected useful lives (in years)	1 year
Maximum
Business Combination, Separately Recognized Transactions [Line Items]
Expected useful lives (in years)	10 years
Lima One
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	$ 61,600	$ 61,615

Summary of Significant Accoun_7

Summary of Significant Accounting Policies (Leases and Depreciation) (Details)	9 Months Ended
	Sep. 30, 2021
Furniture, fixtures, computers and related hardwares | Minimum
Estimated useful life of long-lived assets
Estimated useful life	5 years
Furniture, fixtures, computers and related hardwares | Maximum
Estimated useful life of long-lived assets
Estimated useful life	15 years
Building
Estimated useful life of long-lived assets
Estimated useful life	27 years 6 months

Summary of Significant Accoun_8

Summary of Significant Accounting Policies (Financing Agreements) (Details)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Repurchase financing period, low end of range	1 month
Repurchase financing period, high end of range	6 months
Repurchase financings collateralized by residential whole loans, high end	12 months

Summary of Significant Accoun_9

Summary of Significant Accounting Policies (Equity Based Compensation) (Details) - RSUs	9 Months Ended
	Sep. 30, 2021
Share based compensation
Vesting period of restricted share units (RSUs)	3 years
Period for measuring market condition of award	3 years

Summary of Significant Accou_10

Summary of Significant Accounting Policies (Income Tax) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Percentage of annual REIT taxable income distributed to stockholders	100.00%
REIT income tax expense	$ 0
Deferred income tax expense (benefit)	0	$ 0
Valuation allowance decrease	$ 43,300,000

Residential Whole Loans (Narrat

Residential Whole Loans (Narrative) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021USD ($)loan	Sep. 30, 2021USD ($)loan	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Receivables [Abstract]
Total residential whole loans	$ 7,100,000	$ 7,100,000		$ 5,300,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of whole loans sold | loan	0	0
Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, sale			$ 24,100
Loss on sale of financing receivable			800
Financing receivable, nonaccrual	$ 624,900	$ 624,900		730,900
Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, sale			1,800,000
Loss on sale of financing receivable			$ 273,000
Purchased Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	275,900	275,900		373,300
Purchased credit deteriorated loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	113,000	113,000		151,400
Without Associated Credit Losses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, nonaccrual	$ 122,300	$ 122,300		$ 130,700

Residential Whole Loans (Reside

Residential Whole Loans (Residential Whole Loans) (Details) $ in Thousands		Sep. 30, 2021USD ($)loan	Dec. 31, 2020USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 3,031,966
Allowance for Credit Losses		(44,102)	$ (86,833)
Total Residential Whole Loans	[1],[2]	$ 7,081,462	$ 5,325,401
Number of loans | loan		22,668	18,734
Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses		$ (44,102)	$ (86,833)
Total Residential Whole Loans		$ 2,987,864	$ 4,108,499
Number of loans | loan		10,361	13,112
Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses		$ 0	$ 0
Total Residential Whole Loans		$ 4,093,598	$ 1,216,902
Number of loans | loan		12,307	5,622
Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 5,409,497	$ 3,521,624
Performing | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,456,736	3,521,624
Performing | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,952,761	0
Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,140,837	1,216,902
Nonperforming | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0	0
Nonperforming | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,140,837	1,216,902
Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,683,025
Non-QM loans | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,835,572	2,357,185
Non-QM loans | Performing | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,683,025	2,357,185
Non-QM loans | Performing | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,152,547	0
Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		294,622
Rehabilitation loans | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		596,224	581,801
Rehabilitation loans | Performing | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		294,622	581,801
Rehabilitation loans | Performing | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		301,602	0
Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		368,927
Single-family rental loans | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		741,062	446,374
Single-family rental loans | Performing | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		368,927	446,374
Single-family rental loans | Performing | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		372,135	0
Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		110,162
Seasoned performing loans | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		110,162	136,264
Seasoned performing loans | Performing | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		110,162	136,264
Seasoned performing loans | Performing | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0	0
Agency eligible investor loans | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,126,477	0
Agency eligible investor loans | Performing | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0	0
Agency eligible investor loans | Performing | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,126,477	0
Purchased credit deteriorated loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		575,230	673,708
Purchased credit deteriorated loans | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		575,230	673,708
Purchased credit deteriorated loans | Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 0	$ 0
[1]	Includes approximately $2.3 billion and $1.8 billion of Residential whole loans transferred to consolidated variable interest entities (“VIEs”) at September 30, 2021 and December 31, 2020, respectively. Such assets can be used only to settle the obligations of each respective VIE.
[2]	See Note 6 for information regarding the Company’s pledged assets.

Residential Whole Loans (Resi_2

Residential Whole Loans (Residential Whole Loans, at Carrying Value - Additional Information) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average LTV Ratio	80.00%
Settled Whole Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential whole loans, total or weighted average	$ 5,226,424	$ 3,478,160
Unpaid Principal Balance (“UPB”)	$ 5,107,108	$ 3,467,099
Weighted Average Coupon	5.21%	6.04%
Weighted Average Term to Maturity (Months)	304 months	281 months
Settled Whole Loans | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased performing loans	$ 2,825,883	$ 2,336,117
Unpaid Principal Balance (“UPB”)	$ 2,737,998	$ 2,294,086
Weighted Average Coupon	5.36%	5.84%
Weighted Average Term to Maturity (Months)	350 months	351 months
Weighted Average LTV Ratio	64.00%	64.00%
Weighted Average FICO Scores	725	712
Settled Whole Loans | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased performing loans	$ 587,539	$ 563,430
Unpaid Principal Balance (“UPB”)	$ 594,366	$ 581,801
Weighted Average Coupon	7.27%	7.29%
Weighted Average Term to Maturity (Months)	8 months	3 months
Weighted Average LTV Ratio	66.00%	63.00%
Weighted Average FICO Scores	726	719
Settled Whole Loans | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased performing loans	$ 739,428	$ 442,456
Unpaid Principal Balance (“UPB”)	$ 717,552	$ 442,208
Weighted Average Coupon	5.69%	6.32%
Weighted Average Term to Maturity (Months)	330 months	324 months
Weighted Average LTV Ratio	70.00%	70.00%
Weighted Average FICO Scores	731	730
Settled Whole Loans | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased performing loans	$ 110,112	$ 136,157
Unpaid Principal Balance (“UPB”)	$ 120,444	$ 149,004
Weighted Average Coupon	2.86%	3.30%
Weighted Average Term to Maturity (Months)	164 months	171 months
Weighted Average LTV Ratio	38.00%	40.00%
Weighted Average FICO Scores	722	723
Settled Whole Loans | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased performing loans	$ 963,462
Unpaid Principal Balance (“UPB”)	$ 936,748
Weighted Average Coupon	3.40%
Weighted Average Term to Maturity (Months)	356 months
Weighted Average LTV Ratio	62.00%
Weighted Average FICO Scores	767
Settled Whole Loans | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential whole loans, at carrying value	$ 551,186	$ 630,339
Unpaid Principal Balance (“UPB”)	$ 674,367	$ 782,319
Weighted Average Coupon	4.55%	4.46%
Weighted Average Term to Maturity (Months)	284 months	287 months
Weighted Average LTV Ratio	69.00%	76.00%
Settled Whole Loans | Purchased Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential whole loans, at carrying value	$ 1,140,837	$ 1,216,902
Unpaid Principal Balance (“UPB”)	$ 1,137,666	$ 1,282,093
Weighted Average Coupon	4.88%	4.87%
Weighted Average Term to Maturity (Months)	285 months	290 months
Weighted Average LTV Ratio	74.00%	80.00%
Settled Whole Loans | Residential whole loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential whole loans, at carrying value	$ 6,918,447	$ 5,325,401
Unpaid Principal Balance (“UPB”)	$ 6,919,141	$ 5,531,511
Weighted Average Coupon	5.10%	5.54%
Weighted Average Term to Maturity (Months)	299 months	284 months
Settled Whole Loans | Current | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	$ 2,526,620	$ 2,042,405
Settled Whole Loans | Current | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	469,292	390,706
Settled Whole Loans | Current | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	690,822	411,377
Settled Whole Loans | Current | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	109,331	136,778
Settled Whole Loans | Current | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	933,633
Settled Whole Loans | Current | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	481,330	544,803
Settled Whole Loans | Current | Purchased Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	517,924	497,299
Settled Whole Loans | 30-59 | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	65,991	71,303
Settled Whole Loans | 30-59 | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	17,939	29,315
Settled Whole Loans | 30-59 | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	1,834	6,691
Settled Whole Loans | 30-59 | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	1,095	2,248
Settled Whole Loans | 30-59 | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	2,818
Settled Whole Loans | 30-59 | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	50,991	65,791
Settled Whole Loans | 30-59 | Purchased Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	94,139	104,993
Settled Whole Loans | 60-89 | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	18,902	35,697
Settled Whole Loans | 60-89 | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	3,432	25,433
Settled Whole Loans | 60-89 | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	1,033	3,907
Settled Whole Loans | 60-89 | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	616	1,155
Settled Whole Loans | 60-89 | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	297
Settled Whole Loans | 60-89 | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	18,857	26,697
Settled Whole Loans | 60-89 | Purchased Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	39,605	54,180
Settled Whole Loans | 90 or more | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	126,485	144,681
Settled Whole Loans | 90 or more | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	103,703	136,347
Settled Whole Loans | 90 or more | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	23,863	20,233
Settled Whole Loans | 90 or more | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	9,402	8,823
Settled Whole Loans | 90 or more | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	0
Settled Whole Loans | 90 or more | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	123,189	145,028
Settled Whole Loans | 90 or more | Purchased Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aging by UPB	$ 485,998	$ 625,621

Residential Whole Loans (Allowa

Residential Whole Loans (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 54,261	$ 63,244	$ 86,833	$ 136,589	$ 218,011	$ 3,025	$ 86,833
Transition adjustment on adoption of ASU 2016-13						70,555	70,600
Current provision	(9,626)	(8,583)	(22,372)	(30,062)	(10,614)	74,897
Write-offs	(533)	(400)	(1,217)	(281)	(627)	(647)	(2,149)
Valuation adjustment on loans held for sale					(70,181)	70,181
Ending balance	44,102	54,261	63,244	106,246	136,589	218,011	44,102
Loans	3,031,966						3,031,966
Allowance for loan loss	44,102	54,261	63,244	106,246	136,589	218,011	44,102
Gross up of the amortized cost basis of Purchased Credit Deteriorated Loans							62,400
Non-QM loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,092	14,545	21,068	31,353	103,831	388	21,068
Transition adjustment on adoption of ASU 2016-13						6,904
Current provision	(2,403)	(2,416)	(6,523)	(4,568)	(2,297)	26,358
Write-offs	0	(37)	0	(32)	0	0
Valuation adjustment on loans held for sale					(70,181)	70,181
Ending balance	9,689	12,092	14,545	26,753	31,353	103,831	9,689
Allowance for loan loss	9,689	12,092	14,545	26,753	31,353	103,831	9,689
Rehabilitation loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11,604	13,668	18,371	30,000	35,633	2,331	18,371
Transition adjustment on adoption of ASU 2016-13						517
Current provision	(2,526)	(1,809)	(3,700)	(7,140)	(5,213)	33,213
Write-offs	(393)	(255)	(1,003)	(227)	(420)	(428)
Valuation adjustment on loans held for sale					0	0
Ending balance	8,685	11,604	13,668	22,633	30,000	35,633	8,685
Loans	94,900			143,400			94,900
Allowance for loan loss	8,685	11,604	13,668	22,633	30,000	35,633	8,685
Single-family rental loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,360	2,746	3,918	6,931	7,431	62	3,918
Transition adjustment on adoption of ASU 2016-13						754
Current provision	(670)	(386)	(1,172)	(1,906)	(500)	6,615
Write-offs	(56)	0	0	0	0	0
Valuation adjustment on loans held for sale					0	0
Ending balance	1,634	2,360	2,746	5,025	6,931	7,431	1,634
Allowance for loan loss	1,634	2,360	2,746	5,025	6,931	7,431	1,634
Seasoned performing loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	57	66	107	224	249	0	107
Transition adjustment on adoption of ASU 2016-13						19
Current provision	(7)	(9)	(41)	(74)	(25)	230
Write-offs	0	0	0	0	0	0
Valuation adjustment on loans held for sale					0	0
Ending balance	50	57	66	150	224	249	50
Allowance for loan loss	50	57	66	150	224	249	50
Purchased credit deteriorated loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	28,148	32,219	43,369	68,081	70,867	244	43,369
Transition adjustment on adoption of ASU 2016-13						62,361
Current provision	(4,020)	(3,963)	(10,936)	(16,374)	(2,579)	8,481
Write-offs	(84)	(108)	(214)	(22)	(207)	(219)
Valuation adjustment on loans held for sale					0	0
Ending balance	24,044	28,148	32,219	51,685	68,081	70,867	24,044
Loans	57,400			72,700			57,400
Allowance for loan loss	24,044	$ 28,148	$ 32,219	51,685	$ 68,081	$ 70,867	24,044
Unfunded Loan Commitment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	355			1,600			355
Commitment to lend, unfunded	29,200			73,200			29,200
Allowance for loan loss	$ 355			$ 1,600			$ 355
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan loss								$ 8,300

Residential Whole Loans (Additi

Residential Whole Loans (Additional Credit Related Information) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended	12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 105,270						$ 105,270
2020	415,756						415,756
2019	1,215,425						1,215,425
2018	546,523						546,523
2017	59,843						59,843
Prior	689,149						689,149
Residential whole loans, total or weighted average	3,031,966						3,031,966
Gross write-offs, 2020							0
Gross write-offs, 2019							1,115
Gross write-offs, 2018							505
Gross write-offs, 2017							123
Gross write-offs, prior							406
Nine Months Ended September 30, 2021 Gross write-offs	533	$ 400	$ 1,217	$ 281	$ 627	$ 647	2,149
Net write-offs, 2020							0
Net write-offs, 2019							1,115
Net write-offs, 2018							505
Net write-offs, 2017							123
Net write-offs							406
Nine Months Ended September 30, 2021 Net write-offs							$ 2,149
Ratio Loan-To-Value							80.00%
Debt-to-Value Ratio, Less than 80 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	101,079						$ 101,079
2020	386,874						386,874
2019	1,193,084						1,193,084
2018	530,954						530,954
2017	54,966						54,966
Prior	530,840						530,840
Residential whole loans, total or weighted average	2,797,797						2,797,797
Debt-to-Value Ratio, 81 to 100 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,191						4,191
2020	28,882						28,882
2019	22,341						22,341
2018	15,569						15,569
2017	4,877						4,877
Prior	158,309						158,309
Residential whole loans, total or weighted average	234,169						234,169
Non-QM loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	76,051						76,051
2020	350,244						350,244
2019	786,165						786,165
2018	422,629						422,629
2017	43,558						43,558
Prior	4,378						4,378
Residential whole loans, total or weighted average	1,683,025						1,683,025
Gross write-offs, 2018							37
Nine Months Ended September 30, 2021 Gross write-offs							37
Net write-offs, 2018							37
Nine Months Ended September 30, 2021 Net write-offs							37
Non-QM loans | Debt-to-Value Ratio, Less than 80 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	71,860						71,860
2020	321,875						321,875
2019	770,456						770,456
2018	407,943						407,943
2017	40,381						40,381
Prior	4,228						4,228
Residential whole loans, total or weighted average	1,616,743						1,616,743
Non-QM loans | Debt-to-Value Ratio, 81 to 100 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	4,191						4,191
2020	28,369						28,369
2019	15,709						15,709
2018	14,686						14,686
2017	3,177						3,177
Prior	150						150
Residential whole loans, total or weighted average	66,282						66,282
Rehabilitation loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	13,717						13,717
2020	27,910						27,910
2019	215,844						215,844
2018	32,024						32,024
2017	5,127						5,127
Prior	0						0
Residential whole loans, total or weighted average	294,622						294,622
Gross write-offs, 2019							1,059
Gross write-offs, 2018							468
Gross write-offs, 2017							123
Nine Months Ended September 30, 2021 Gross write-offs							1,650
Net write-offs, 2019							1,059
Net write-offs, 2018							468
Net write-offs, 2017							123
Nine Months Ended September 30, 2021 Net write-offs							1,650
Rehabilitation loans | Debt-to-Value Ratio, Less than 80 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	13,717						13,717
2020	27,910						27,910
2019	214,618						214,618
2018	31,228						31,228
2017	3,427						3,427
Prior	0						0
Residential whole loans, total or weighted average	290,900						290,900
Rehabilitation loans | Debt-to-Value Ratio, 81 to 100 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	1,226						1,226
2018	796						796
2017	1,700						1,700
Prior	0						0
Residential whole loans, total or weighted average	3,722						3,722
Single-family rental loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	15,502						15,502
2020	37,602						37,602
2019	213,416						213,416
2018	91,870						91,870
2017	10,537						10,537
Prior	0						0
Residential whole loans, total or weighted average	368,927						368,927
Gross write-offs, 2019							56
Nine Months Ended September 30, 2021 Gross write-offs							56
Net write-offs, 2019							56
Nine Months Ended September 30, 2021 Net write-offs							56
Single-family rental loans | Debt-to-Value Ratio, Less than 80 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	15,502						15,502
2020	37,089						37,089
2019	208,010						208,010
2018	91,783						91,783
2017	10,537						10,537
Prior	0						0
Residential whole loans, total or weighted average	362,921						362,921
Single-family rental loans | Debt-to-Value Ratio, 81 to 100 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	513						513
2019	5,406						5,406
2018	87						87
2017	0						0
Prior	0						0
Residential whole loans, total or weighted average	6,006						6,006
Seasoned performing loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	0						0
2018	0						0
2017	0						0
Prior	110,162						110,162
Residential whole loans, total or weighted average	110,162						110,162
Seasoned performing loans | Debt-to-Value Ratio, Less than 80 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	0						0
2018	0						0
2017	0						0
Prior	105,348						105,348
Residential whole loans, total or weighted average	105,348						105,348
Seasoned performing loans | Debt-to-Value Ratio, 81 to 100 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	0						0
2018	0						0
2017	0						0
Prior	4,814						4,814
Residential whole loans, total or weighted average	4,814						4,814
Purchased credit deteriorated loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	0						0
2018	0						0
2017	621						621
Prior	574,609						574,609
Residential whole loans, total or weighted average	575,230						575,230	$ 673,708
Gross write-offs, prior							406
Nine Months Ended September 30, 2021 Gross write-offs							406
Net write-offs							406
Nine Months Ended September 30, 2021 Net write-offs							406
Purchased credit deteriorated loans | Debt-to-Value Ratio, Less than 80 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	0						0
2018	0						0
2017	621						621
Prior	421,264						421,264
Residential whole loans, total or weighted average	421,885						421,885
Purchased credit deteriorated loans | Debt-to-Value Ratio, 81 to 100 Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0						0
2020	0						0
2019	0						0
2018	0						0
2017	0						0
Prior	153,345						153,345
Residential whole loans, total or weighted average	153,345						153,345
Settled Whole Loans | Non-QM loans
Financing Receivable, Credit Quality Indicator [Line Items]
Purchased performing loans	2,825,883						$ 2,825,883	$ 2,336,117
Ratio Loan-To-Value							64.00%	64.00%
Settled Whole Loans | Rehabilitation loans
Financing Receivable, Credit Quality Indicator [Line Items]
Purchased performing loans	587,539						$ 587,539	$ 563,430
Ratio Loan-To-Value							66.00%	63.00%
Settled Whole Loans | Single-family rental loans
Financing Receivable, Credit Quality Indicator [Line Items]
Purchased performing loans	739,428						$ 739,428	$ 442,456
Ratio Loan-To-Value							70.00%	70.00%
Settled Whole Loans | Seasoned performing loans
Financing Receivable, Credit Quality Indicator [Line Items]
Purchased performing loans	110,112						$ 110,112	$ 136,157
Ratio Loan-To-Value							38.00%	40.00%
Settled Whole Loans | Certain rehabilitation loans
Financing Receivable, Credit Quality Indicator [Line Items]
Purchased performing loans	$ 142,700						$ 142,700	$ 189,900
Ratio Loan-To-Value			69.00%				70.00%

Residential Whole Loans (LTV on

Residential Whole Loans (LTV on Loans) (Details) - 90 Days or More Delinquent $ in Thousands	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 355,096	$ 432,774
UPB	375,946	455,112
Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	494,901	571,729
UPB	496,694	625,621
Fair Value | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	484,510	571,729
UPB	$ 485,998	$ 625,621
LTV (as a percent)	0.812	0.868
Fair Value | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 10,391	$ 0
UPB	$ 10,696	$ 0
LTV (as a percent)	0.627	0
Purchased credit deteriorated loans | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 100,905	$ 119,621
UPB	$ 123,189	$ 145,028
LTV (as a percent)	0.798	0.867
Non-QM loans | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 121,741	$ 148,387
UPB	$ 119,572	$ 144,681
LTV (as a percent)	0.645	0.659
Rehabilitation loans | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 101,012	$ 136,347
UPB	$ 101,012	$ 136,347
LTV (as a percent)	0.686	0.658
Single-family rental loans | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 22,767	$ 20,388
UPB	$ 22,771	$ 20,233
LTV (as a percent)	0.736	0.727
Seasoned performing loans | Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value / Fair Value	$ 8,671	$ 8,031
UPB	$ 9,402	$ 8,823
LTV (as a percent)	0.513	0.551

Residential Whole Loans (Intere

Residential Whole Loans (Interest Income Components) (Details) - Residential whole loans - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 79,602	$ 70,948	$ 213,156	$ 261,819
Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	10,504	8,784	30,097	27,265
Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	48,394	45,609	124,327	180,041
Performing | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	23,891	25,884	68,047	112,212
Performing | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	9,918	10,863	23,914	39,502
Performing | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	9,497	6,917	23,484	21,528
Performing | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	1,728	1,945	5,260	6,799
Performing | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	3,360	0	3,622	0
Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	20,704	16,555	58,732	54,513
Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	41,551	54,393	134,169	207,306
Carrying Value | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	10,504	8,784	30,097	27,265
Carrying Value | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	31,047	45,609	104,072	180,041
Carrying Value | Performing | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	17,437	25,884	59,789	112,212
Carrying Value | Performing | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	5,808	10,863	19,429	39,502
Carrying Value | Performing | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	6,074	6,917	19,594	21,528
Carrying Value | Performing | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	1,728	1,945	5,260	6,799
Carrying Value | Performing | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	0	0	0	0
Carrying Value | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	0	0	0	0
Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	38,051	16,555	78,987	54,513
Fair Value | Purchased Credit Deteriorated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	0	0	0	0
Fair Value | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	17,347	0	20,255	0
Fair Value | Performing | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	6,454	0	8,258	0
Fair Value | Performing | Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	4,110	0	4,485	0
Fair Value | Performing | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	3,423	0	3,890	0
Fair Value | Performing | Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	0	0	0	0
Fair Value | Performing | Agency eligible investor loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	3,360	0	3,622	0
Fair Value | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 20,704	$ 16,555	$ 58,732	$ 54,513

Residential Whole Loans (Fair V

Residential Whole Loans (Fair Value Components of Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Receivables [Abstract]
Net unrealized gains/(losses)	$ 20,494	$ 58,863	$ 58,807	$ (13,683)
Other income	1,321	1,453	518	3,601
Total	$ 21,815	$ 60,316	$ 59,325	$ (10,082)

Securities, at Fair Value (Narr

Securities, at Fair Value (Narrative) (Details) - USD ($)	Dec. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Minimum term of fixed rate mortgages underlying MBS					15 years
Maximum term of fixed rate mortgages underlying MBS					30 years
Allowance for loan loss	$ 86,833,000	$ 44,102,000	$ 106,246,000	$ 218,011,000	$ 44,102,000	$ 106,246,000	$ 54,261,000	$ 63,244,000	$ 136,589,000	$ 3,025,000
Impairment and other gains and losses on securities available-for-sale and other assets		(10,000,000)	$ 221,000		(10,000,000)	424,966,000
Securities, at fair value
Debt Securities, Available-for-sale [Line Items]
Securities, at fair value	239,000,000	177,500,000			177,500,000
Amortized costs	184,900,000	135,100,000			135,100,000
Gross unrealized gains	$ 54,000,000	42,500,000			$ 42,500,000
Weighted average yield	12.30%				12.60%
Weighted average to maturity	8 years 8 months 12 days				6 years 1 month 6 days
Proceeds from sale of MSR						711,700,000
Realized losses						28,700,000
Impairment				$ 280,800,000
Non-Agency MBS
Debt Securities, Available-for-sale [Line Items]
Securities, at fair value							$ 0
Allowance for loan loss		$ 0			$ 0
MBS and MSR-Related Assets
Debt Securities, Available-for-sale [Line Items]
Impairment and other gains and losses on securities available-for-sale and other assets						$ 63,500,000
Minimum | RPL/NPL MBS
Debt Securities, Available-for-sale [Line Items]
Debt instrument, basis spread on variable rate					3.00%
Debt instrument, coupon step-up period					36 months
Maximum | RPL/NPL MBS
Debt Securities, Available-for-sale [Line Items]
Debt instrument, basis spread on variable rate					4.00%
Debt instrument, coupon step-up period					48 months

Securities, at Fair Value (Resi

Securities, at Fair Value (Residential Mortgage Securities) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fair  Value	[1]	$ 283,037	$ 399,999
Residential Mortgage Securities
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face		102,307	161,878
Purchase Premiums		6,163	3,022
Accretable Purchase Discounts		(59)	(8,206)
Discount Designated as Credit Reserve and OTTI		(20,768)	(21,437)
Amortized Cost		87,643	135,257
Gross Unrealized Gains		17,853	26,926
Gross Unrealized Losses		(8)	(1,183)
Net Unrealized Gain/(Loss)		17,845	25,743
Fair  Value		105,488	161,000
RPL/NPL MBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face			55,000
Amortized Cost			46,900
Fair  Value			$ 53,900
Expected to Recover Less Than Par
Debt Securities, Available-for-sale [Line Items]
Percentage of current face amount of Non-Agency MBS to be recovered			99.00%
CRT, Fair Value Option
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Gains		2,200	$ 551
Gross Unrealized Losses		(8)	(322)
Fair  Value		$ 68,000	$ 66,200
[1]	See Note 6 for information regarding the Company’s pledged assets.

Securities, at Fair Value (Sale

Securities, at Fair Value (Sale of MBS) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	$ 0	$ 116	$ 0	$ 3,062,858
Gains/(Losses)	0	48	0	61,697
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	0	0	0	1,500,875
Gains/(Losses)	0	0	0	(19,291)
Non-Agency MBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	0	116	0	1,318,958
Gains/(Losses)	0	48	0	107,999
CRT securities
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	0	0	0	243,025
Gains/(Losses)	$ 0	$ 0	$ 0	$ (27,011)

Securities, at Fair Value (Roll

Securities, at Fair Value (Rollforward) (Details) - Agency MBS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	$ 0	$ 0	$ 0	$ 0
Securities with no prior loss allowance	0	0	0	344,269
Securities with a prior loss allowance	0	0	0	0
Write-offs, including allowance related to securities the Company intended to sell	0	0	0	(344,269)
Allowance for credit losses at end of period	$ 0	$ 0	$ 0	$ 0

Securities, at Fair Value (Impa

Securities, at Fair Value (Impact of AFS Securities on AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI from AFS Securities:
Unrealized gain on AFS securities at beginning of period	$ 66,163	$ 52,889	$ 79,607	$ 392,722
Unrealized (loss)/gain on AFS securities, net	(8,029)	15,082	(21,473)	408,585
Reclassification adjustment for MBS sales included in net income	0	(60)	0	(389,127)
Reclassification adjustment for impairment included in net income	0	0	0	(344,269)
Change in AOCI from AFS securities	(8,029)	15,022	(21,473)	(324,811)
Balance at end of period	58,134	67,911	58,134	67,911
Agency MBS
AOCI from AFS Securities:
Unrealized (loss)/gain on AFS securities, net	$ (8,029)	$ 15,082	$ (21,473)	$ 408,585

Securities, at Fair Value (Inte

Securities, at Fair Value (Interest Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Interest income	$ 10,629,000	$ 8,570,000	$ 42,433,000	$ 81,867,000
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Coupon interest	0	0	0	14,038,000
Effective yield adjustment	0	0	0	(5,186,000)
Interest income	0	0	0	8,852,000
Legacy Non-Agency MBS
Debt Securities, Available-for-sale [Line Items]
Coupon interest	0	42,000	14,000	18,222,000
Effective yield adjustment	0	6,000	670,000	10,564,000
Interest income	0	48,000	684,000	28,786,000
Accretion Income			670,000
RPL/NPL MBS
Debt Securities, Available-for-sale [Line Items]
Coupon interest	0	811,000	373,000	7,622,000
Effective yield adjustment	0	94,000	8,136,000	449,000
Interest income	0	905,000	8,509,000	8,071,000
Accretion Income			8,100,000	277,000
CRT securities
Debt Securities, Available-for-sale [Line Items]
Coupon interest	931,000	956,000	2,774,000	6,063,000
Effective yield adjustment	1,364,000	420,000	3,152,000	(94,000)
Interest income	2,295,000	1,376,000	5,926,000	5,969,000
MSR-related assets
Debt Securities, Available-for-sale [Line Items]
Coupon interest	1,595,000	2,991,000	6,044,000	23,332,000
Effective yield adjustment	6,739,000	3,250,000	21,270,000	6,857,000
Interest income	8,334,000	$ 6,241,000	27,314,000	$ 30,189,000
Accretion Income	$ 4,000,000		$ 12,400,000

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Other Assets [Abstract]
REO		$ 178,802	$ 204,762	$ 249,699	$ 298,867	$ 348,516	$ 411,659
Capital contributions made to loan origination partners		53,537		47,148
Goodwill		61,615		0
Intangible assets, net		24,700		0
Other interest-earning assets		35,437		0
Interest receivable		41,432		38,850
Other loan related receivables		45,242		16,682
Lease right-of-use asset		39,500		758
Other		61,338		32,244
Total Other Assets	[1]	541,603		385,381
Real estate held-for-investment		16,100		$ 61,800
Accumulated amortization		$ 3,300
Borrowing rate		7.50%
[1]	See Note 6 for information regarding the Company’s pledged assets.

Other Assets (Real Estate Owned

Other Assets (Real Estate Owned) (Details) $ in Thousands	Sep. 30, 2021USD ($)property	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)property	Sep. 30, 2020USD ($)property	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Real Estate Properties [Line Items]
Number of real estate owned properties | property	674		946	1,131
Real estate owned	$ 178,802	$ 204,762	$ 249,699	$ 298,867	$ 348,516	$ 411,659
Residential Whole Loans acquired through foreclosure ordered in lieu	176,300
Carrying Value
Real Estate Properties [Line Items]
Mortgage loans in process of foreclosure	96,600
Estimated Fair Value
Real Estate Properties [Line Items]
Mortgage loans in process of foreclosure	$ 391,500

Other Assets (Real Estate Own_2

Other Assets (Real Estate Owned - Activity) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)property	Sep. 30, 2020USD ($)property	Sep. 30, 2021USD ($)propertyloan	Sep. 30, 2020USD ($)property	Dec. 31, 2020property
Real Estate Owned [Roll Forward]
Balance at beginning of period	$ 204,762,000	$ 348,516,000	$ 249,699,000	$ 411,659,000
Adjustments to record at lower of cost or fair value	2,448,000	(93,000)	3,390,000	11,796,000
Transfer from residential whole loans	11,673,000	15,672,000	50,043,000	74,891,000
Purchases and capital improvements, net	1,584,000	771,000	2,207,000	10,072,000
Disposals	(36,769,000)	(66,185,000)	(119,757,000)	(185,959,000)
Balance at end of period	$ 178,802,000	$ 298,867,000	$ 178,802,000	$ 298,867,000
Number of properties | property	674	1,131	674	1,131	946
Gain recorded on transfer from residential whole loans to real estate owned	$ 700,000	$ 834,000	$ (400,000)	$ 4,100,000
Properties sold during period	151	267	470	812
Proceeds from sale of real estate	$ 45,400,000	$ 69,900,000	$ 134,000,000	$ 195,200,000
Gain on sales of real estate owned	$ 7,300,000	$ 3,900,000	$ 13,400,000	$ 10,000,000

Other Assets (Capital Contribut

Other Assets (Capital Contributions Made to Loan Origination Partners) (Details) - USD ($)	Jul. 01, 2021	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Assets [Line Items]
Gain on investment in Lima One common equity (Note 16)		$ 38,933,000	$ 0		$ 38,933,000	$ 0
Impairment (reversal) on investment		(10,000,000)
Lima One
Other Assets [Line Items]
Gain on investment in Lima One common equity (Note 16)	$ 38,900,000
Impairment (reversal) on investment	$ (5,000,000)			$ 21,000,000
Loan Originators
Other Assets [Line Items]
Equity method investments		23,200,000			23,200,000
Impairment (reversal) on investment		0			0	$ 65,200,000
Company’s residential whole loans at carrying value are serviced by entities the Company has an investment in		1,000,000,000			1,000,000,000
Preferred Stock | Loan Originators
Other Assets [Line Items]
Equity method investments		$ 67,800,000			$ 67,800,000

Other Assets (Derivative Instru

Other Assets (Derivative Instruments Narrative) (Details ) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020
Designated as Hedging Instrument
Derivative [Line Items]
Derivative, terminated amount	$ 4,100
Swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Loss on derivative		$ 4.3
Realized loss		$ 9.4

Other Assets (Impact of Derivat

Other Assets (Impact of Derivative Instruments) (Details) - Swaps, at fair value - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Interest (expense)/income attributable to Swaps	$ 0	$ 0	$ 0	$ (3,359)
Weighted average Swap rate paid	0.00%	0.00%	0.00%	2.06%
Weighted average Swap rate received	0.00%	0.00%	0.00%	1.63%

Other Assets (Impact of Deriv_2

Other Assets (Impact of Derivative Hedging Instruments on AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]
Balance at beginning of period	$ 0	$ (7,176)	$ 0	$ (22,675)
Net (loss)/gain on Swaps	0	0	0	(50,127)
Reclassification adjustment for losses related to hedging instruments included in net income	0	7,176	0	72,802
Balance at end of period	$ 0	$ 0	$ 0	$ 0

Other Assets (TBA Securities) (

Other Assets (TBA Securities) (Details) - Short	3 Months Ended	9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2021USD ($)
TBA Securities
Derivative [Line Items]
Aggregate value	$ 5,400,000	$ 5,400,000
Gain on derivative	2,100,000	1,000,000
FNCL 2.0 10/21
Derivative [Line Items]
Notional Amount	420,000,000	420,000,000
FNCL 2.5 10/21
Derivative [Line Items]
Notional Amount	$ 330,000,000	$ 330,000,000

Financing Agreements (Financing

Financing Agreements (Financing Agreements) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 5,557,639	$ 4,339,479
Fair value / Carrying Value	5,550,808	4,336,976
Fair Value
Financing Agreements [Line Items]
Unpaid Principal Balance	2,491,537	3,361,179
Amortized Cost Balance	2,491,531	3,352,529
Fair value / Carrying Value	2,496,584	3,366,772
Carrying Value
Financing Agreements [Line Items]
Unpaid Principal Balance	3,066,102	978,300
Fair value / Carrying Value	3,054,224	970,204
Financing agreements with non-mark-to-market collateral provisions | Fair Value
Financing Agreements [Line Items]
Unpaid Principal Balance	689,205	1,156,899
Amortized Cost Balance	689,205	1,156,899
Fair value / Carrying Value	690,583	1,159,213
Financing agreements with non-mark-to-market collateral provisions | Carrying Value
Financing Agreements [Line Items]
Unpaid Principal Balance	157,784
Fair value / Carrying Value	157,366
Agreements with mark-to-market collateral provisions
Financing Agreements [Line Items]
Fair value / Carrying Value	1,300,000
Agreements with mark-to-market collateral provisions | Fair Value
Financing Agreements [Line Items]
Unpaid Principal Balance	1,275,172	1,338,077
Amortized Cost Balance	1,275,172	1,338,077
Fair value / Carrying Value	1,275,172	1,338,077
Agreements with mark-to-market collateral provisions | Carrying Value
Financing Agreements [Line Items]
Unpaid Principal Balance	1,155,964
Fair value / Carrying Value	1,155,820
Securitized debt | Fair Value
Financing Agreements [Line Items]
Unpaid Principal Balance	527,160	866,203
Amortized Cost Balance	527,154	857,553
Fair value / Carrying Value	530,829	869,482
Securitized debt | Carrying Value
Financing Agreements [Line Items]
Unpaid Principal Balance	1,522,354	648,300
Fair value / Carrying Value	1,514,900	645,027
Convertible senior notes | Carrying Value
Financing Agreements [Line Items]
Unpaid Principal Balance	230,000	230,000
Fair value / Carrying Value	$ 226,138	225,177
Senior notes | Carrying Value
Financing Agreements [Line Items]
Unpaid Principal Balance		100,000
Fair value / Carrying Value		$ 100,000

Financing Agreements (Narrative

Financing Agreements (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2021	Dec. 31, 2020
Financing Agreements [Line Items]
Agreement amount		$ 5,557,639	$ 4,339,479
Financial instruments		5,550,808	4,336,976
Financing Agreement
Financing Agreements [Line Items]
Cash pledged as collateral		55,500	$ 7,200
Agreements with mark-to-market collateral provisions
Financing Agreements [Line Items]
Financial instruments		1,300,000
Non Mark to Market Financing Facilities
Financing Agreements [Line Items]
Financial instruments	$ 1,650,000	$ 573,800
Debt instrument term		2 years
Debt instrument, term, extension		3 years
Non Mark to Market Financing Facilities on Rehabilitation Loans
Financing Agreements [Line Items]
Long-term debt, term		2 years
Debt outstanding		$ 116,800
Minimum | Agreements with mark-to-market collateral provisions
Financing Agreements [Line Items]
Debt instrument term	1 month
Maximum | Agreements with mark-to-market collateral provisions
Financing Agreements [Line Items]
Debt instrument term	3 months

Financing Agreements (Borrowing

Financing Agreements (Borrowings Under Financing Agreement And Associated Assets Pledged as Collateral) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 7,024,171	$ 5,842,560
Non-mark-to-market financing secured by residential whole loans | Fair Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	681,567	1,156,125
Fair value of securities pledged as collateral under financing agreements	$ 1,191,747	$ 1,930,283
Weighted average haircut (percent)	42.03%	39.46%
Non-mark-to-market financing secured by real estate owned | Fair Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	$ 9,016	$ 3,088
Fair value of securities pledged as collateral under financing agreements	$ 23,296	$ 7,441
Weighted average haircut (percent)	61.09%	59.73%
Mark-to-market financing agreements secured by residential whole loans
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 3,007,602	$ 4,140,961
Mark-to-market financing agreements secured by residential whole loans | Fair Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	1,262,811	1,113,553
Fair value of securities pledged as collateral under financing agreements	$ 1,910,051	$ 1,798,813
Weighted average haircut (percent)	31.84%	34.17%
Mark-to-market financing agreements secured by residential whole loans | Carrying Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	$ 984,016
Fair value of securities pledged as collateral under financing agreements	$ 1,161,100
Weighted average haircut (percent)	15.21%
Mark-to-market financing agreements secured by securities at fair value | Fair Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	$ 0	$ 213,915
Fair value of securities pledged as collateral under financing agreements	$ 0	$ 399,999
Weighted average haircut (percent)	0.00%	41.16%
Mark-to-market financing agreements secured by securities at fair value | Carrying Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	$ 171,804
Fair value of securities pledged as collateral under financing agreements	$ 283,037
Weighted average haircut (percent)	38.33%
Mark-to-market financing agreements secured by real estate owned
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 88,335	$ 49,477
Mark-to-market financing agreements secured by real estate owned | Fair Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	12,361	10,609
Fair value of securities pledged as collateral under financing agreements	$ 38,388	$ 22,525
Weighted average haircut (percent)	61.22%	55.56%
Financing agreements with non-mark-to-market collateral provisions | Carrying Value
Assets Sold under Agreements to Repurchase [Line Items]
Carrying Value	$ 157,366
Fair value of securities pledged as collateral under financing agreements	$ 182,316
Weighted average haircut (percent)	13.00%
Loan Securitization | Fair Value
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged as collateral under financing agreements		$ 141,900

Financing Agreements (Borrowi_2

Financing Agreements (Borrowings Under Repurchase Agreement) (Details) - Repurchase Agreement Borrowings - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 1,964,377	$ 2,494,976
Weighted Average Interest Rate	2.55%	3.16%
Carrying Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 1,313,747
Weighted Average Interest Rate	2.00%
Within 30 days | Fair Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 1,964,377	$ 2,494,976
Weighted Average Interest Rate	2.55%	3.16%
Within 30 days | Carrying Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 1,259,588
Weighted Average Interest Rate	1.90%
Over 30 days to 3 months | Fair Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 0	$ 0
Weighted Average Interest Rate	0.00%	0.00%
Over 30 days to 3 months | Carrying Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 36,141
Weighted Average Interest Rate	4.30%
Over 3 months to 12 months | Fair Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 0	$ 0
Weighted Average Interest Rate	0.00%	0.00%
Over 3 months to 12 months | Carrying Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 18,018
Weighted Average Interest Rate	4.50%
Over 12 months | Fair Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 0	$ 0
Weighted Average Interest Rate	0.00%	0.00%
Over 12 months | Carrying Value
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 0
Weighted Average Interest Rate	0.00%

Financing Agreements (Senior Se

Financing Agreements (Senior Secured Term Loan Facility - Narrative) (Details) $ in Millions	Jun. 26, 2020USD ($)
Senior Secured Term Loan Facility
Repurchase agreements counterparty risk
Debt instrument, face amount	$ 500

Financing Agreements (Securitiz

Financing Agreements (Securitized Debt - Narrative) (Details)	Sep. 30, 2021	Dec. 31, 2020
Asset-backed Securities, Securitized Loans and Receivables
Debt Instrument [Line Items]
Weighted average interest rate	1.55%	2.11%

Financing Agreements (Convertib

Financing Agreements (Convertible Senior Notes - Narrative) (Details)	Jun. 03, 2019USD ($)$ / shares
Convertible Debt
Debt Instrument [Line Items]
Proceeds from issuance of Series C Preferred Stock	$ 230,000,000
Proceed from debt net of offering expenses and underwriting discount	$ 223,300,000
Stated interest rate	6.25%
Conversion ratio	125.7387
Debt instrument, face amount	$ 1,000
Conversion price (usd per share) | $ / shares	$ 7.95
Effective interest rate	6.94%
Additional Convertible Senior Notes
Debt Instrument [Line Items]
Proceeds from issuance of Series C Preferred Stock	$ 30,000,000

Financing Agreements (Senior No

Financing Agreements (Senior Notes - Narrative) (Details) - Senior Notes $ in Millions	Apr. 11, 2012USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 100
Stated interest rate	8.00%
Effective interest rate	8.31%

Financing Agreements (Counterpa

Financing Agreements (Counterparty for Repurchase Agreement) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)counterparty	Dec. 31, 2020counterparty
Repurchase agreements counterparty risk
Number of counterparties | counterparty	7	7
Threshold of stockholders' equity at risk with single counterparty to financing agreements or linked transactions (greater than) (percent)	5.00%
Barclays Bank
Repurchase agreements counterparty risk
Amount at Risk	$ 527,745
Weighted  Average Months  to Repricing for Repurchase Agreements	1 month
Percent of Stockholders’ Equity	20.30%
Credit Suisse
Repurchase agreements counterparty risk
Amount at Risk	$ 420,704
Weighted  Average Months  to Repricing for Repurchase Agreements	1 month
Percent of Stockholders’ Equity	16.20%
Wells Fargo
Repurchase agreements counterparty risk
Amount at Risk	$ 296,559
Weighted  Average Months  to Repricing for Repurchase Agreements	1 month
Percent of Stockholders’ Equity	11.40%

Financing Agreements (Pledged C

Financing Agreements (Pledged Collateral) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 7,024,171	$ 5,842,560
Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	1,369,924	1,927,464
Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	3,287,985	2,046,954
Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	2,366,262	1,868,142
Residential whole loans, at carrying value
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	3,007,602	4,140,961
Residential whole loans, at carrying value | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	794,267	1,497,281
Residential whole loans, at carrying value | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	533,633	1,207,364
Residential whole loans, at carrying value | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	1,679,702	1,436,316
Residential whole loans, at fair value
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	3,705,529	1,209,349
Residential whole loans, at fair value | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	555,738	430,183
Residential whole loans, at fair value | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	2,499,284	396,817
Residential whole loans, at fair value | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	650,507	382,349
Securities, at fair value
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	222,705	442,773
Securities, at fair value | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	0	0
Securities, at fair value | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	222,705	442,773
Securities, at fair value | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	0	0
Other assets: REO
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	88,335	49,477
Other assets: REO | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	19,919	0
Other assets: REO | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	32,363	0
Other assets: REO | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 36,053	$ 49,477

Collateral Positions (Details)

Collateral Positions (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Collateral Positions
Accrued interest on assets	$ 21,400	$ 24,600
Financial Instruments Owned and Pledged as Collateral [Line Items]
Fair value of assets	2,496,584	3,366,772
Asset Pledged as Collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Fair value of assets	$ 4,800,000	$ 4,200,000

Offsetting Assets and Liabili_2

Offsetting Assets and Liabilities (Narrative) (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Offsetting [Abstract]
Fair value of financial instruments pledged against the repurchase agreements and other advances	$ 4,800,000,000	$ 4,200,000,000
Fair value of securities pledged against the swaps	$ 0	$ 0

Other Liabilities (Details)

Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Liabilities [Abstract]
Payable for unsettled residential whole loans purchases	$ 163,015	$ 0
Dividends and dividend equivalents payable	44,247	34,016
Lease liability	44,284	636
Accrued interest payable	11,174	11,116
Accrued expenses and other	73,235	24,754
Total Other Liabilities	$ 335,955	$ 70,522

Commitments and Contingencies (

Commitments and Contingencies (Minimum Payments) (Details) $ in Thousands	Sep. 30, 2021USD ($)
Commitments and Contingencies Disclosure [Abstract]
2021	$ 465
2022	5,220
2023	5,236
2024	5,230
2025	4,638
Thereafter	54,156
Total	$ 74,945

Commitments and Contingencies_2

Commitments and Contingencies (Lease Commitments) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021USD ($)lease	Sep. 30, 2021USD ($)lease
Lease Commitments
Lease liability	$ 74,945	$ 74,945
Number of lease commitments | lease	2	2
Corporate headquarters
Lease Commitments
Lease cost	$ 1,100	$ 2,900
New Corporate Headquarters Location
Lease Commitments
Lease term	15 years	15 years
Renewal term	5 years	5 years

Commitments and Contingencies_3

Commitments and Contingencies (Rehabilitation Loan Commitments) (Details) $ in Millions	Sep. 30, 2021USD ($)
Commitments and Contingencies Disclosure [Abstract]
Unfunded commitment for rehabilitation loans	$ 186.5

Commitments and Contingencies_4

Commitments and Contingencies (Residential Whole Loan Purchase Commitments) (Details) $ in Millions	Sep. 30, 2021USD ($)
Other Commitments [Line Items]
Unsettled residential whole loans	$ 163

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) $ / shares in Units, $ in Thousands	Mar. 02, 2020USD ($)	Feb. 28, 2020directorquarter$ / sharesshares	Apr. 15, 2013$ / sharesshares	Sep. 30, 2021USD ($)quarterdirector$ / sharesshares	Sep. 30, 2020USD ($)$ / shares	Dec. 31, 2020$ / sharesshares
Stockholders' Equity
Proceeds from issuance of redeemable preferred stock | $				$ 0	$ 275,000
Series B Preferred Stock
Stockholders' Equity
Preferred Stock, dividend rate				7.50%
Preferred stock, shares issued (in shares) | shares				8,000,000		8,000,000
Preferred stock par value (usd per share)				$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares) | shares				8,000,000		8,000,000
Series C Preferred Stock
Stockholders' Equity
Preferred Stock, dividend rate				6.50%
Preferred stock, shares issued (in shares) | shares				11,000,000		11,000,000
Preferred stock par value (usd per share)				$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares) | shares				11,000,000		11,000,000
Preferred Stock | Series B Preferred Stock
Stockholders' Equity
Preferred Stock, dividend rate			7.50%	7.50%	7.50%
Preferred stock, shares issued (in shares) | shares			8,000,000
Preferred stock par value (usd per share)			$ 0.01
Preferred stock, liquidation preference (in dollars per share)			25	$ 25	$ 25
Preferred stock, redemption price (in dollars per share)			$ 25
Maximum quarters without dividends to get voting rights, in quarters | quarter				6
Number of additional directors that can be elected by preferred stock holders | director				2
Percentage required for making material changes			66.67%
Preferred Stock | Series C Preferred Stock
Stockholders' Equity
Preferred Stock, dividend rate		6.50%		6.50%	6.50%
Preferred stock, shares issued (in shares) | shares		11,000,000
Preferred stock par value (usd per share)		$ 0.01
Preferred stock, liquidation preference (in dollars per share)		25		$ 25	$ 25
Preferred stock, redemption price (in dollars per share)		$ 25
Maximum quarters without dividends to get voting rights, in quarters | quarter		6
Number of additional directors that can be elected by preferred stock holders | director		2
Shares reclassified to redeemable capital stock (in shares) | shares		12,650,000
Proceeds from issuance of redeemable preferred stock | $	$ 266,000
Percentage required for making material changes			66.67%
LIBOR | Preferred Stock | Series C Preferred Stock
Stockholders' Equity
Debt instrument, basis spread on variable rate		5.345%

Stockholders' Equity (Dividends

Stockholders' Equity (Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 15, 2021	Aug. 26, 2021	Jun. 15, 2021	May 24, 2021	Mar. 12, 2021	Feb. 19, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020
Class of Stock [Line Items]
Dividend declared per share, common stock (in dollars per share)							$ 0.10	$ 0.10	$ 0.075	$ 0.05
Dividends payable							$ 44,247			$ 22,758
Series B Preferred Stock
Class of Stock [Line Items]
Dividend declared per share, preferred stock (in dollars per share)		$ 0.46875		$ 0.46875		$ 0.46875	$ 0.46875	0.46875	0.46875	$ 1.40625
Series C Preferred Stock
Class of Stock [Line Items]
Dividend declared per share, preferred stock (in dollars per share)		$ 0.40625		$ 0.40625		$ 0.40625	$ 0.40625	$ 0.40625	$ 0.40625	$ 0.93889
Dividend declared per share, common stock (in dollars per share)	$ 0.100		$ 0.100		$ 0.075
Dividends payable							$ 44,200

Stockholders' Equity (DRSPP) (D

Stockholders' Equity (DRSPP) (Details) - USD ($)	3 Months Ended	9 Months Ended	217 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020	Oct. 15, 2019
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	874,300,000	874,300,000	874,300,000	874,300,000
DRSPP
Class of Stock [Line Items]
Common stock, shares authorized (in shares)					9,000,000
Shares of common stock authorized and available for issuance (in shares)	8,400,000	8,400,000	8,400,000
Common shares issued through DRSPP (in shares)	114,730	312,318	34,926,721
Net proceeds from shares issued through DRSPP	$ 537,136	$ 1,300,000	$ 288,900,000

Stockholders' Equity (At-the-Ma

Stockholders' Equity (At-the-Market) (Details) - At The Market - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Aug. 16, 2019
Class of Stock [Line Items]
At-the-market, maximum potential proceeds		$ 400
Sales commission of gross sales price		2.00%
Number of shares issued (in shares)	0
Value remaining outstanding for future offerings	$ 390

Stockholders' Equity (Stock Rep

Stockholders' Equity (Stock Repurchase Program) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2021	Nov. 02, 2020	Dec. 31, 2013
Share-based Payment Arrangement [Abstract]
Stock repurchase program, authorized amount	$ 117,700	$ 250,000
Number of shares authorized to be repurchased under the Repurchase Program (in shares)			10,000,000
Number of remaining shares authorized to be repurchased under the Repurchase Program (in shares)			6,600,000
Shares repurchased and retired (in shares)	11,606,229
Average cost per share (usd per share)	$ 4.14
Cost for shares repurchased	$ 48,100
Payments for fees and commissions paid to the sales agent	$ 116

Stockholders' Equity (Accumulat

Stockholders' Equity (Accumulated Other Comprehensive Income/(Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Components of accumulated other comprehensive income/(loss)
Balance	$ 2,526,537	$ 2,521,051	$ 2,524,802	$ 3,383,952
OCI before reclassifications	(7,820)	(7,570)	(20,538)	335,806
Amounts reclassified from AOCI	0	7,116	0	(660,594)
Other Comprehensive (Loss)	(7,820)	(454)	(20,538)	(324,788)
Balance	2,601,087	2,565,656	2,601,087	2,565,656
Total  AOCI
Components of accumulated other comprehensive income/(loss)
Balance	64,575	45,713	77,293	370,047
Balance	56,755	45,259	56,755	45,259
Net Unrealized Gain/(Loss) on AFS Securities
Components of accumulated other comprehensive income/(loss)
Balance	66,163	52,889	79,607	392,722
OCI before reclassifications	(8,029)	15,082	(21,473)	408,585
Amounts reclassified from AOCI	0	(60)	0	(733,396)
Other Comprehensive (Loss)	(8,029)	15,022	(21,473)	(324,811)
Balance	58,134	67,911	58,134	67,911
Net (Loss)/Gain on Swaps
Components of accumulated other comprehensive income/(loss)
Balance	0	(7,176)	0	(22,675)
OCI before reclassifications	0	0	0	(50,127)
Amounts reclassified from AOCI	0	7,176	0	72,802
Other Comprehensive (Loss)	0	7,176	0	22,675
Balance	0	0	0	0
Net Unrealized Gain/(Loss) on Financing Agreements
Components of accumulated other comprehensive income/(loss)
Balance	(1,588)	0	(2,314)	0
OCI before reclassifications	209	(22,652)	935	(22,652)
Amounts reclassified from AOCI	0	0	0	0
Other Comprehensive (Loss)	209	(22,652)	935	(22,652)
Balance	$ (1,379)	$ (22,652)	$ (1,379)	$ (22,652)

Stockholders' Equity (AOCI Recl

Stockholders' Equity (AOCI Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain on sale of securities	$ 0	$ 48	$ 0	$ (188,847)
Other, net	7,226	3,086	18,787	(11,355)
Total AFS Securities	124,293	78,991	260,091	(746,785)
Derivative hedging instrument fair value changes, net	0	0	0	(50,127)
Amounts reclassified from AOCI	0	7,116	0	(660,594)
Amounts Reclassified from AOCI | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain on sale of securities	0	(60)	0	(389,127)
Other, net	0	0	0	(344,269)
Total AFS Securities	$ 0	(60)	$ 0	(733,396)
Amounts Reclassified from AOCI | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of de-designated hedging instruments		7,176		72,802
Derivative hedging instrument fair value changes, net		$ 7,176		$ 72,802

EPS Calculation (Details)

EPS Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic Earnings/(Loss) per Share:
Net income/(loss) to common stockholders	$ 132,511	$ 66,714	$ 85,522	$ 87,210	$ 96,578	$ (908,995)	$ 284,747	$ (725,207)
Dividends declared on preferred stock	(8,218)			(8,219)			(24,656)	(21,578)
Dividends, dividend equivalents and undistributed earnings allocated to participating securities	(435)			(325)			(915)	(91)
Net income/(loss) to common stockholders - basic	$ 123,858			$ 78,666			$ 259,176	$ (746,876)
Basic weighted average common shares outstanding (in shares)	440,889			453,323			444,481	453,170
Basic (Loss)/Earnings per Share (usd per share)	$ 0.28			$ 0.17			$ 0.58	$ (1.65)
Diluted Earnings/(Loss) per Share:
Net income/(loss) to common stockholders - basic	$ 123,858			$ 78,666			$ 259,176	$ (746,876)
Interest expense on Convertible Senior Notes	3,920			3,898			11,743	0
Dividends, dividend equivalents and undistributed earnings allocated to participating securities	435			0			915	0
Net income/(loss) to common stockholders - diluted	$ 128,213			$ 82,564			$ 271,834	$ (746,876)
Basic weighted average common shares outstanding (in shares)	440,889			453,323			444,481	453,170
Effect of assumed Convertible Senior Notes conversion to common shares (in shares)	28,920			28,920			28,920	0
Unvested and vested restricted stock units (in shares)	3,377			0			1,623	0
Effect of Warrants (in shares)	0			11,297			0	0
Diluted weighted average common shares outstanding (in shares)	473,186			493,540			475,024	453,170
Diluted EPS (usd per share)	$ 0.27			$ 0.17			$ 0.57	$ (1.65)
Anti-dilutive securities excluded from diluted earnings per share calculations (in shares)							7,000
RSUs
Diluted Earnings/(Loss) per Share:
Weighted average grant date fair value (in dollars per share)	$ 4.21						$ 4.21

Equity Compensation and Other_3

Equity Compensation and Other Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Share based compensation
Maximum shares authorized for grant	18,000,000		18,000,000
Shares available for grant (in shares)	10,500,000		10,500,000
RSUs
Share based compensation
Awards granted (in shares)	1,224,507	497,507	3,925,589	1,702,220
Forfeitures (in shares)			0	0
Unrecognized compensation cost	$ 14,600		$ 14,600		$ 6,800
Period for recognizing unrecognized compensation cost			2 years
Restricted shares of common stock
Share based compensation
Awards granted (in shares)		79,545	0	79,545
Share-based awards outstanding (in shares)	0		0
Dividend Equivalent Rights
Share based compensation
Share-based awards outstanding (in shares)	0	0	0	0
Equivalent rights payment	$ 155		$ 412	$ 276
Equity Compensation Plan
Share based compensation
Maximum number of common shares that can be granted to participant in any one year			2,000,000
Period during which a participant can be awarded the maximum number of shares allowable under the Plan			1 year
Maximum percentage of common shares that can be owned or deemed to be owned by a participant (more than)			9.80%

Equity Compensation and Other_4

Equity Compensation and Other Benefit Plans (Allocated Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share based compensation
Allocated expense	$ 2,306	$ 2,267	$ 6,738	$ 5,094
RSUs
Share based compensation
Allocated expense	$ 2,306	$ 2,267	$ 6,738	$ 5,094

Equity Compensation and Other_5

Equity Compensation and Other Benefit Plans (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Deferred Compensation Plans
Deferred Compensation Activity
Deferrable compensation by the employee, maximum			100.00%
Non-employee directors	$ 43	$ 75	$ 488	$ (1,483)
Undistributed Income Deferred	2,564		2,564		$ 2,197
Liability Under Deferred Plans	2,664		2,664		1,809
Deferred Compensation Plans | Non-employee directors
Deferred Compensation Activity
Non-employee directors	43	75	488	(1,483)
Undistributed Income Deferred	2,564		2,564		2,197
Liability Under Deferred Plans	2,664		$ 2,664		$ 1,809
Savings Plan
Deferred Compensation Activity
Employer contribution percentage on first 3 percent of eligible compensation deferred by employees (percent)			100.00%
Percentage of eligible compensation deferred by employees qualifying for 100 percent matching contribution (percent)			3.00%
Employer contribution percentage on next 2 percent of eligible compensation deferred by employees (percent)			50.00%
Percentage of eligible compensation deferred by employees qualifying for 50 percent matching contribution (percent)			2.00%
Percentage of employer matching contributions that vest immediately (percent)			100.00%
Expenses for matching contributions	$ 219	$ 120	$ 469	$ 360

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Total assets carried at fair value	$ 4,376,635	$ 1,616,901
Liabilities:
Securitized debt	530,829	869,482
Residential whole loans
Assets:
Residential whole loans, at fair value	4,093,598	1,216,902
Liabilities:
Total liabilities carried at fair value	2,496,584	3,366,772
Securities, at fair value
Assets:
Securities, at fair value	283,037	399,999
Agreements with Non-mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	690,583	1,159,213
Agreements with Mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	1,275,172	1,338,077
Level 1
Assets:
Total assets carried at fair value	0	0
Liabilities:
Securitized debt	0	0
Level 1 | Residential whole loans
Assets:
Residential whole loans, at fair value	0	0
Liabilities:
Total liabilities carried at fair value	0	0
Level 1 | Securities, at fair value
Assets:
Securities, at fair value	0	0
Level 1 | Agreements with Non-mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	0	0
Level 1 | Agreements with Mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	0	0
Level 2
Assets:
Total assets carried at fair value	283,037	399,999
Liabilities:
Securitized debt	530,829	869,482
Level 2 | Residential whole loans
Assets:
Residential whole loans, at fair value	0	0
Liabilities:
Total liabilities carried at fair value	530,829	1,083,397
Level 2 | Securities, at fair value
Assets:
Securities, at fair value	283,037	399,999
Level 2 | Agreements with Non-mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	0	0
Level 2 | Agreements with Mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	0	213,915
Level 3
Assets:
Total assets carried at fair value	4,093,598	1,216,902
Liabilities:
Securitized debt	0	0
Level 3 | Residential whole loans
Assets:
Residential whole loans, at fair value	4,093,598	1,216,902
Liabilities:
Total liabilities carried at fair value	1,965,755	2,283,375
Level 3 | Securities, at fair value
Assets:
Securities, at fair value	0	0
Level 3 | Agreements with Non-mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	690,583	1,159,213
Level 3 | Agreements with Mark-to-market Collateral Provisions
Liabilities:
Liabilities carried at fair value	$ 1,275,172	$ 1,124,162

Fair Value of Financial Instr_4

Fair Value of Financial Instruments (Level 3 Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unsettled residential whole loans	$ 163,000		$ 163,000
Recurring basis | Level 3 | Residential whole loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	2,003,580	$ 1,200,981	1,216,902	$ 1,381,583
Purchases and originations	1,968,079	0	2,805,939	0
Draws	11,152	0	11,575	0
Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings	20,494	58,863	58,807	(13,683)
Repayments	(65,985)	(21,721)	(130,488)	(65,934)
Sales and repurchases	241	(929)	671	(19,460)
Transfer to REO	(6,978)	(7,530)	(32,823)	(52,842)
Balance at end of period	$ 3,930,583	$ 1,229,664	$ 3,930,583	$ 1,229,664

Fair Value of Financial Instr_5

Fair Value of Financial Instruments (Level 3 Liabilities) (Details) - Level 3 - Recurring basis - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Agreements with Non-mark-to-market Collateral Provisions
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 795,341	$ 0	$ 1,159,213	$ 0
Issuances	0	2,036,597	0	2,036,597
Payment of principal	(104,549)	(312,638)	(467,695)	(312,638)
Changes in unrealized losses	(209)	3,448	(935)	3,448
Balance at end of period	690,583	1,727,407	690,583	1,727,407
Agreements with Mark-to-market Collateral Provisions
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	858,066	0	1,124,162	0
Issuances	597,761	1,386,592	989,407	1,386,592
Payment of principal	(180,655)	(156,032)	(838,397)	(156,032)
Changes in unrealized losses	0	1,174	0	1,174
Balance at end of period	$ 1,275,172	$ 1,231,734	$ 1,275,172	$ 1,231,734

Fair Value of Financial Instr_6

Fair Value of Financial Instruments (Fair Value Methodology) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2021USD ($)	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchased Loans		$ 1,139,743	$ 1,216,637
Purchases excluded from level 2 fair value		1,100	265
Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchased Loans		2,790,512
Purchases excluded from level 2 fair value		162,200
Discounted cash flow | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchased Loans		774,666	789,576
Discounted cash flow | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchased Loans		2,780,698
Liquidation model | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchased Loans		365,077	427,061
Simple average amount		432	$ 380
Liquidation model | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchased Loans		$ 9,814
Residential whole loans | Level 3 | Liquidation model | Minimum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Annual Change in Home Prices	1.80%	4.60%
Liquidation timeline (in years)	9 months 18 days	1 month 6 days
Fair Value Inputs, Value of Underlying Property	$ 12	$ 10
Residential whole loans | Level 3 | Liquidation model | Minimum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Annual Change in Home Prices		0.00%
Liquidation timeline (in years)		1 year
Fair Value Inputs, Value of Underlying Property		$ 50
Residential whole loans | Level 3 | Liquidation model | Maximum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Annual Change in Home Prices	6.50%	27.30%
Liquidation timeline (in years)	4 years 9 months 18 days	4 years 9 months 18 days
Fair Value Inputs, Value of Underlying Property	$ 4,500	$ 3,995
Residential whole loans | Level 3 | Liquidation model | Maximum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Annual Change in Home Prices		12.40%
Liquidation timeline (in years)		4 years 4 months 24 days
Fair Value Inputs, Value of Underlying Property		$ 2,075
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.025	0.033
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.009
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.115	0.080
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.505
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.034	0.039
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.033
Discount rate | Residential whole loans | Level 3 | Liquidation model | Minimum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.067	0.067
Discount rate | Residential whole loans | Level 3 | Liquidation model | Minimum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.070
Discount rate | Residential whole loans | Level 3 | Liquidation model | Maximum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.500	0.500
Discount rate | Residential whole loans | Level 3 | Liquidation model | Maximum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.070
Discount rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.081	0.081
Discount rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.070
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0	0
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.438	0.176
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.501
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.122	0.054
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.184
Prepayment rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Annual Change in Home Prices	3.60%	9.30%
Prepayment rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Annual Change in Home Prices		7.80%
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0	0
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.313	0.477
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.218
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.040	0.041
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.003
Default rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liquidation timeline (in years)	1 year 9 months 18 days	1 year 8 months 12 days
Default rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liquidation timeline (in years)		2 years 2 months 12 days
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0	0
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		1	1
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.100
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.118	0.127
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input		0.089
Loss severity | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Value of Underlying Property	$ 729	$ 788
Loss severity | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Value of Underlying Property		$ 884

Fair Value of Financial Instr_7

Fair Value of Financial Instruments (Carrying Value vs Fair Value) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Financial Assets:
Securities, at fair value	[1]	$ 283,037	$ 399,999
Restricted cash		55,507	7,165
Carrying Value
Financial Assets:
Securities, at fair value		283,037	399,999
Cash and cash equivalents		526,241	814,354
Restricted cash		55,507	7,165
Financial Liabilities:
Securitized debt		2,045,729	1,514,509
Convertible senior notes		226,138	225,177
Senior notes		0	100,000
Estimated Fair Value
Financial Assets:
Securities, at fair value		283,037	399,999
Cash and cash equivalents		526,241	814,354
Restricted cash		55,507	7,165
Financial Liabilities:
Securitized debt		2,053,714	1,519,567
Convertible senior notes		234,328	228,287
Senior notes		0	100,031
Residential whole loans | Carrying Value
Financial Assets:
Residential whole loans, carrying value		7,081,462	5,325,401
Residential whole loans | Estimated Fair Value
Financial Assets:
Residential whole loans, carrying value		7,280,297	5,499,303
Financing agreements with non-mark-to-market collateral provisions | Carrying Value
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		847,949	1,159,213
Financing agreements with non-mark-to-market collateral provisions | Estimated Fair Value
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		848,367	1,159,213
Agreements with mark-to-market collateral provisions | Carrying Value
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		2,259,188	1,124,162
Agreements with mark-to-market collateral provisions | Estimated Fair Value
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		2,259,332	1,124,162
Financing agreements with mark-to-market collateral provisions | Carrying Value
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		171,804	213,915
Financing agreements with mark-to-market collateral provisions | Estimated Fair Value
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		$ 171,804	$ 213,915
[1]	See Note 6 for information regarding the Company’s pledged assets.

Fair Value of Financial Instr_8

Fair Value of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	Jul. 01, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Carrying value and estimated fair value of financial instruments
Other real estate, fair value		$ 50,000	$ 74,900	$ 50,000	$ 74,900
Gain on investment in Lima One common equity (Note 16)		$ 38,933	$ 0	$ 38,933	$ 0
Lima One
Carrying value and estimated fair value of financial instruments
Gain on investment in Lima One common equity (Note 16)	$ 38,900

Use of Special Purpose Entiti_3

Use of Special Purpose Entities and Variable Interest Entities (Loan Securitization Transaction) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity [Line Items]
Aggregate unpaid principal balance of residential whole loans sold	$ 3,047,295	$ 3,047,295	$ 2,232,561
Outstanding amount of Senior Bonds, at carrying value	1,514,900	1,514,900	645,027
Outstanding amount of Senior Bonds, at fair value	530,829	530,829	869,482
Outstanding amount of Senior Bonds, total	$ 2,045,729	$ 2,045,729	$ 1,514,509
Weighted average interest rate	1.55%	1.55%	2.11%
Weighted average contractual maturity of Senior Bonds		41 years	41 years
Cash received		$ 2,788,354	$ 1,853,408
Debt issuance cost	$ 7,700	7,700	3,200
Senior notes
Variable Interest Entity [Line Items]
Cash received	277,300	1,500,000
Senior notes | Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity [Line Items]
Principal amount of Securitized debt	2,788,383	2,788,383	1,862,068
Proceeds from Senior bond sold with Step up feature		$ 387,600	568,700
Debt instrument, coupon step-up period		36 months
Senior notes | Asset-backed Securities, Securitized Loans and Receivables | Minimum
Variable Interest Entity [Line Items]
Debt instrument, basis spread on variable rate		1.00%
Senior notes | Asset-backed Securities, Securitized Loans and Receivables | Maximum
Variable Interest Entity [Line Items]
Debt instrument, basis spread on variable rate		3.00%
Senior Support Certificates | Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity [Line Items]
Principal amount of Securitized debt	$ 227,167	$ 227,167	$ 268,548

Use of Special Purpose Entiti_4

Use of Special Purpose Entities and Variable Interest Entities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Total residential whole loans	$ 7,100,000	$ 7,100,000	$ 5,300,000
Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity [Line Items]
Proceeds from issuance of debt		2,788,354	1,853,408
Residential whole loans	2,300,000	2,300,000	1,800,000
Securitized debt	2,000,000	2,000,000	1,500,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets
Variable Interest Entity [Line Items]
Real estate owned at fair value	36,100	36,100	$ 49,500
Senior Bonds
Variable Interest Entity [Line Items]
Proceeds from issuance of debt	277,300	1,500,000
Proceed from debt net of offering expenses and underwriting discount	$ 277,300	$ 1,500,000

Acquisition of Lima One Holdi_3

Acquisition of Lima One Holdings, LLC - Narrative (Details) - USD ($) $ in Thousands	Jul. 01, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Combination, Separately Recognized Transactions [Line Items]
Impairment (reversal) on investment		$ (10,000)
Outstanding preferred equity repaid at acquisition					$ 22,030	$ 0
Lima One
Business Combination, Separately Recognized Transactions [Line Items]
Percentage acquired	57.00%
Consideration transferred	$ 57,255
Equity method investment at fair value	$ 44,465
Ownership percentage	100.00%
Prior ownership percentage			43.00%
Comment equity interest, book value			$ 5,600
Impairment (reversal) on investment	$ (5,000)			$ 21,000
Purchase consideration allocated	101,700
Outstanding preferred equity repaid at acquisition	47,400
Acquisition related costs		57			378
Finite-lived intangible assets	28,000
Lima One | RSUs
Business Combination, Separately Recognized Transactions [Line Items]
Consideration transferred	4,700
Lima One | Net Interest Income and Other Revenue
Business Combination, Separately Recognized Transactions [Line Items]
Subsidiary net Interest income and other revenue		24,100			24,100
Lima One | Net Income
Business Combination, Separately Recognized Transactions [Line Items]
Subsidiary net Interest income and other revenue		$ 13,700			$ 13,700
Lima One | MFA Financial
Business Combination, Separately Recognized Transactions [Line Items]
Outstanding preferred equity repaid at acquisition	$ 22,000

Acquisition of Lima One Holdi_4

Acquisition of Lima One Holdings, LLC - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jul. 01, 2021	Sep. 30, 2021	Dec. 31, 2020
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill		$ 61,615	$ 0
Lima One
Business Combination, Separately Recognized Transactions [Line Items]
Cash	$ 57,255
Equity method investment at fair value	44,465
Total consideration	101,720
Business purpose residential loans, at fair value	170,220
Cash and cash equivalents	16,531
Restricted cash	91,394
Other assets	36,864
Goodwill	61,615	$ 61,600
Intangible assets	28,000
Total assets acquired	404,624
Short term debt, net	(170,908)
Accrued expenses and other liabilities	(84,620)
Total liabilities assumed	(255,528)
Preferred equity repaid at closing	(47,376)
Total net assets acquired	101,720
Lima One | RSUs
Business Combination, Separately Recognized Transactions [Line Items]
Cash	$ 4,700

Acquisition of Lima One Holdi_5

Acquisition of Lima One Holdings, LLC - Intangible Assets (Details) - Lima One - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Jul. 01, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangibles	$ 24,700	$ 24,700	$ 28,000
Amortization	(3,300)
Trademarks / Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangibles	3,900	$ 3,900	4,000
Amortization	(100)
Amortization Period		10 years
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangibles	14,000	$ 14,000	16,000
Amortization	(2,000)
Amortization Period		4 years
Internally Developed Software
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangibles	3,800	$ 3,800	4,000
Amortization	(200)
Amortization Period		5 years
Non-Compete Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangibles	3,000	$ 3,000	$ 4,000
Amortization	$ (1,000)
Amortization Period		1 year

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Details) - Agency eligible investor loans - Settled Whole Loans - USD ($) $ in Thousands	Nov. 05, 2021	Sep. 30, 2021
Subsequent Event [Line Items]
Securitization of eligible investor loans		$ 963,462
Subsequent Event
Subsequent Event [Line Items]
Securitization of eligible investor loans	$ 312,300

Uncategorized Items - mfa-20210

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]