AG Mortgage Investment Trust (MITT) 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Nov. 04, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-35151
Entity Registrant Name	AG MORTGAGE INVESTMENT TRUST, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	27-5254382
Entity Address, Address Line One	245 Park Avenue
Entity Address, Address Line Two	26th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10167
City Area Code	212
Local Phone Number	692-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		40,721,831
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001514281
Current Fiscal Year End Date	--12-31
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	MITT
Security Exchange Name	NYSE
8.25% Series A Cumulative Redeemable Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	8.25% Series A Cumulative Redeemable Preferred Stock
Trading Symbol	MITT PrA
Security Exchange Name	NYSE
8.00% Series B Cumulative Redeemable Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	8.00% Series B Cumulative Redeemable Preferred Stock
Trading Symbol	MITT PrB
Security Exchange Name	NYSE
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Trading Symbol	MITT PrC
Security Exchange Name	NYSE

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Assets
Residential mortgage loans, at fair value - $45,019 and $171,224 pledged as collateral, respectively (2)	[1]	$ 429,648	$ 417,785
Commercial loans, at fair value - $0 and $4,674 pledged as collateral, respectively		122,880	158,686
Investments in debt and equity of affiliates		138,689	156,311
Excess mortgage servicing rights, at fair value		3,526	17,775
Cash and cash equivalents		44,592	81,692
Restricted cash		5,108	43,677
Other assets		9,159	21,905
Assets held for sale - Single-family rental properties, net		0	154
Total Assets		1,101,224	4,347,817
Liabilities
Financing arrangements		225,504	3,233,468
Securitized debt, at fair value	[1],[2]	358,986	224,348
Payable on unsettled trades		105,016	0
Dividend payable		0	14,734
Other liabilities		20,944	24,675
Liabilities held for sale - Single-family rental properties, net		305	1,546
Total Liabilities		710,755	3,498,771
Commitments and Contingencies (Note 13)
Stockholders’ Equity
Common stock, par value $0.01 per share; 450,000 shares of common stock authorized and 36,121 and 32,742 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively		361	327
Additional paid-in capital		673,105	662,183
Retained earnings/(deficit)		(552,959)	(85,921)
Total Stockholders’ Equity		390,469	849,046
Total Liabilities & Stockholders’ Equity		1,101,224	4,347,817
8.25% Series A Cumulative Redeemable Preferred Stock
Stockholders’ Equity
Preferred stock - $0.01 par value; 50,000 shares authorized:		48,888	49,921
8.00% Series B Cumulative Redeemable Preferred Stock
Stockholders’ Equity
Preferred stock - $0.01 par value; 50,000 shares authorized:		110,541	111,293
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Stockholders’ Equity
Preferred stock - $0.01 par value; 50,000 shares authorized:		110,533	111,243
Agency
Assets
Real estate securities, at fair value		250,123	2,315,439
Non-Agency
Assets
Real estate securities, at fair value	[2]	43,271	717,470
CMBS
Assets
Real estate securities, at fair value		$ 54,228	$ 416,923
[1]	See Note 4 for details related to variable interest entities.
[2]	See Note 3 for details related to variable interest entities.

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	450,000,000	450,000,000
Common stock, shares issued (in shares)	36,121,000	32,742,000
Common stock, shares outstanding (in shares)	36,121,000	32,742,000
8.25% Series A Cumulative Redeemable Preferred Stock
Preferred stock dividend percentage	8.25%
Preferred stock, shares issued (in shares)	2,027,000	2,070,000
Preferred stock, shares outstanding (in shares)	2,027,000	2,070,000
Preferred stock, liquidation preference	$ 52,770	$ 51,750
8.00% Series B Cumulative Redeemable Preferred Stock
Preferred stock dividend percentage	8.00%
Preferred stock, shares issued (in shares)	4,569,000	4,600,000
Preferred stock, shares outstanding (in shares)	4,569,000	4,600,000
Preferred stock, liquidation preference	$ 118,792	$ 115,000
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Preferred stock dividend percentage	8.00%
Preferred stock, shares issued (in shares)	4,571,000	4,600,000
Preferred stock, shares outstanding (in shares)	4,571,000	4,600,000
Preferred stock, liquidation preference	$ 118,837	$ 115,000
Residential Mortgage
Residential mortgage loans, at fair value, pledged as collateral	45,019	171,224
Commercial Loan
Residential mortgage loans, at fair value, pledged as collateral	0	4,674
Agency
Fair value of investments pledged as collateral under repurchase agreements	107,252	2,234,921
Non-Agency
Fair value of investments pledged as collateral under repurchase agreements	26,711	682,828
CMBS
Fair value of investments pledged as collateral under repurchase agreements	$ 40,486	$ 413,922

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Interest Income
Interest income	$ 9,717	$ 40,735	$ 63,354	$ 123,126
Interest expense	4,357	21,887	32,941	67,011
Total Net Interest Income	5,360	18,848	30,413	56,115
Other Income/(Loss)
Net realized gain/(loss)	(14,431)	(16,132)	(257,183)	(64,225)
Net interest component of interest rate swaps	(13)	2,179	910	5,760
Unrealized gain/(loss) on real estate securities and loans, net	19,495	11,726	(184,770)	101,644
Unrealized gain/(loss) on derivative and other instruments, net	1,970	3,258	(1,797)	(17,667)
Foreign currency gain/(loss), net	(10)	667	1,483	667
Other income	0	210	4	840
Total Other Income/(Loss)	7,011	1,908	(441,353)	27,019
Expenses
Management fee to affiliate	1,698	2,346	5,525	7,091
Other operating expenses	5,929	6,062	11,253	13,650
Restructuring related expenses	1,345	0	9,949	0
Equity based compensation to affiliate	0	76	163	275
Excise tax	0	186	(815)	464
Servicing fees	540	416	1,685	1,203
Total Expenses	9,512	9,086	27,760	22,683
Income/(loss) before equity in earnings/(loss) from affiliates	2,859	11,670	(438,700)	60,451
Equity in earnings/(loss) from affiliates	17,187	(564)	(23,571)	715
Net Income/(Loss) from Continuing Operations	20,046	11,106	(462,271)	61,166
Net Income/(Loss) from Discontinued Operations	0	(1,057)	361	(3,284)
Net Income/(Loss)	20,046	10,049	(461,910)	57,882
Gain on Exchange Offer, net	539	0	539	0
Dividends on preferred stock (1)	(5,563)	(3,720)	(16,897)	(10,455)
Net Income/(Loss) Available to Common Stockholders	$ 15,022	$ 6,329	$ (478,268)	$ 47,427
Earnings/(Loss) Per Share - Basic
Continuing Operations (in dollars per share)	$ 0.44	$ 0.22	$ (14.35)	$ 1.58
Discontinued Operations (in dollars per share)	0	(0.03)	0.01	(0.10)
Total Earnings/(Loss) Per Share of Common Stock (in dollars per share)	0.44	0.19	(14.34)	1.48
Earnings/(Loss) Per Share - Diluted
Continuing Operations (in dollars per share)	0.44	0.22	(14.35)	1.58
Discontinued Operations (in dollars per share)	0	(0.03)	0.01	(0.10)
Total Earnings/(Loss) Per Share of Common Stock (in dollars per share)	$ 0.44	$ 0.19	$ (14.34)	$ 1.48
Weighted Average Number of Shares of Common Stock Outstanding
Basic (in shares)	34,422	32,736	33,347	32,007
Diluted (in shares)	34,422	32,748	33,347	32,016

Consolidated Statements of Op_2

Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 17, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Amount of Preferred Dividend in Arrears		$ 5,600	$ 400	$ 11,231	$ 400
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Amount of Preferred Dividend in Arrears				$ 4,571
Preferred stock dividend percentage	8.00%		8.00%	8.00%	8.00%

Consolidated Statements of Stoc

Consolidated Statements of Stockholders’ Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Preferred Stock	Additional Paid-in Capital	Retained Earnings/(Deficit)	8.25 % Series A Cumulative Redeemable Preferred Stock	8.25 % Series A Cumulative Redeemable Preferred StockPreferred Stock	8.25 % Series A Cumulative Redeemable Preferred StockRetained Earnings/(Deficit)	8.00 % Series B Cumulative Redeemable Preferred Stock	8.00 % Series B Cumulative Redeemable Preferred StockPreferred Stock	8.00 % Series B Cumulative Redeemable Preferred StockRetained Earnings/(Deficit)	8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock	8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred StockPreferred Stock	8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred StockRetained Earnings/(Deficit)
Beginning Balance (in shares) at Dec. 31, 2018		28,744
Beginning Balance at Dec. 31, 2018	$ 656,011	$ 287		$ 595,412	$ (100,902)		$ 49,921			$ 111,293			$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from issuance of stock (in shares)		3,953
Net proceeds from issuance of stock	66,063	$ 40		66,023									111,183
Grant of restricted stock and amortization of equity based compensation (in shares)		39
Grant of restricted stock and amortization of equity based compensation	574			574
Dividends declared	(47,438)				(47,438)	$ (3,202)		$ (3,202)	$ (6,900)		$ (6,900)
Net Income/(Loss)	57,882				57,882
Ending Balance (in shares) at Sep. 30, 2019		32,736
Ending Balance at Sep. 30, 2019	834,173	$ 327		662,009	(100,560)		49,921			111,293			111,183
Beginning Balance (in shares) at Jun. 30, 2019		32,709
Beginning Balance at Jun. 30, 2019	730,864	$ 327		661,833	(92,510)		49,921			111,293			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from issuance of stock			$ 111,183										111,183
Grant of restricted stock and amortization of equity based compensation (in shares)		27
Grant of restricted stock and amortization of equity based compensation	176			176
Dividends declared	(14,731)				(14,731)	(1,068)		(1,068)	(2,300)		(2,300)
Net Income/(Loss)	10,049				10,049
Ending Balance (in shares) at Sep. 30, 2019		32,736
Ending Balance at Sep. 30, 2019	834,173	$ 327		662,009	(100,560)		49,921			111,293			111,183
Beginning Balance (in shares) at Dec. 31, 2019		32,742
Beginning Balance at Dec. 31, 2019	849,046	$ 327		662,183	(85,921)		49,921			111,293			111,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from issuance of stock (in shares)		2,738
Net proceeds from issuance of stock	8,984	$ 28		8,956
Grant of restricted stock and amortization of equity based compensation (in shares)		125
Grant of restricted stock and amortization of equity based compensation	516	$ 1		515
Dividends declared						$ (1,067)		$ (1,067)	$ (2,300)		$ (2,300)	$ (2,300)		$ (2,300)
Exchange Offer (in shares)		516
Exchange Offer	(500)	$ 5		1,451	539		(1,033)			(752)			(710)
Net Income/(Loss)	(461,910)				(461,910)
Ending Balance (in shares) at Sep. 30, 2020		36,121
Ending Balance at Sep. 30, 2020	390,469	$ 361		673,105	(552,959)		48,888			110,541			110,533
Beginning Balance (in shares) at Jun. 30, 2020		33,825
Beginning Balance at Jun. 30, 2020	365,378	$ 338		666,127	(573,544)		49,921			111,293			111,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net proceeds from issuance of stock (in shares)		1,736
Net proceeds from issuance of stock	5,485	$ 18		5,467
Grant of restricted stock and amortization of equity based compensation (in shares)		44
Grant of restricted stock and amortization of equity based compensation	60			60
Exchange Offer (in shares)		516
Exchange Offer	(500)	$ 5		1,451	539		(1,033)			(752)			(710)
Net Income/(Loss)	20,046				20,046
Ending Balance (in shares) at Sep. 30, 2020		36,121
Ending Balance at Sep. 30, 2020	$ 390,469	$ 361		$ 673,105	$ (552,959)		$ 48,888			$ 110,541			$ 110,533

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities
Net income/(loss)	$ (461,910)	$ 57,882
Net (income)/loss from discontinued operations	(361)	3,284
Net income/(loss) from continuing operations	(462,271)	61,166
Adjustments to reconcile net income/(loss) to net cash provided by (used in) operating activities:
Net amortization of premium/(discount)	(4,401)	(1,605)
Net realized (gain)/loss	257,183	64,225
Unrealized (gain)/loss on real estate securities and loans, net	184,770	(101,644)
Unrealized (gain)/loss on derivative and other instruments, net	1,797	17,667
Foreign currency (gain)/loss, net	(1,483)	(667)
Equity based compensation to affiliate	163	275
Equity based compensation expense	353	299
(Income)/Loss from investments in debt and equity of affiliates in excess of distributions received	25,712	6,896
Change in operating assets/liabilities:
Other assets	8,644	(4,683)
Other liabilities	(12,025)	(7,624)
Net cash provided by (used in) continuing operating activities	(1,558)	34,305
Net cash provided by (used in) discontinued operating activities	(726)	(1,508)
Net cash provided by (used in) operating activities	(2,284)	32,797
Cash Flows from Investing Activities
Purchase of real estate securities	(174,845)	(1,767,918)
Purchase of residential mortgage loans	(541,823)	(207,048)
Origination of commercial loans	(8,228)	(67,386)
Purchase of commercial loans	(19,280)	(23,065)
Purchase of U.S. Treasury securities	0	(81,917)
Investments in debt and equity of affiliates	(44,869)	(75,528)
Proceeds from sales of excess MSRs	7,735	0
Proceeds from sales of real estate securities	2,722,425	677,554
Proceeds from sales of residential mortgage loans	393,633	12,780
Proceeds from sales of commercial loans	36,935	0
Proceeds from sales of U.S. Treasury securities	0	82,048
Principal repayments on real estate securities	104,213	251,684
Principal repayments on excess MSRs	2,579	3,053
Principal repayments on commercial loans	5,710	43,217
Principal repayments on residential mortgage loans	50,563	13,729
Distributions received in excess of income from investments in debt and equity of affiliates	26,444	12,276
Net proceeds from (payments made on) reverse repurchase agreements	0	11,499
Net proceeds from (payments made on) sales of securities borrowed under reverse repurchase agreements	0	(11,479)
Net settlement of interest rate swaps and other instruments	(73,180)	(73,330)
Net settlement of TBAs	4,610	2,753
Cash flows provided by (used in) other investing activities	(743)	(364)
Net cash provided by (used in) continuing investing activities	2,491,879	(1,197,442)
Net cash provided by (used in) discontinued investing activities	0	374
Net cash provided by (used in) investing activities	2,491,879	(1,197,068)
Cash Flows from Financing Activities
Net proceeds from issuance of common stock	4,669	66,063
Net proceeds from issuance of preferred stock	0	111,183
Borrowings under financing arrangements	13,374,192	34,984,677
Repayments of financing arrangements	(16,037,399)	(34,180,260)
Borrowings under secured debt	20,000	0
Repayments of secured debt	(10,000)	0
Proceeds from issuance of securitized debt	166,487	224,931
Principal repayments on securitized debt	(16,021)	(2,474)
Net collateral received from (paid to) derivative counterparty	0	(724)
Net collateral received from (paid to) repurchase counterparty	(46,613)	1,456
Dividends paid on common stock	(14,734)	(47,078)
Dividends paid on preferred stock	(5,667)	(10,102)
Net cash provided by continuing financing activities	(2,565,086)	1,147,672
Net cash provided by (used in) financing activities	(2,565,086)	1,147,672
Net change in cash, cash equivalents and restricted cash	(75,491)	(16,599)
Cash, cash equivalents, and restricted cash, Beginning of Period	125,369	84,358
Effect of exchange rate changes on cash	(178)	82
Cash, cash equivalents, and restricted cash, End of Period	49,700	67,841
Supplemental disclosure of cash flow information:
Cash paid for interest on financing arrangements	42,625	74,483
Cash paid for excise and income taxes	1,058	1,413
Supplemental disclosure of non-cash financing and investing activities:
Payable on unsettled trades	105,016	15,544
Receivable on unsettled trades	0	4,509
Common stock dividends declared but not paid	0	14,731
Exchange Offer (Note 12)	2,495	0
Holdback on sale of excess MSRs	725	0
Management fees paid using Common Stock in lieu of cash	4,315	0
Decrease in securitized debt	7,091	2,846
Transfer of real estate securities in satisfaction of repurchase agreements	345,066	0
Change in repurchase agreements from transfer of real estate securities	344,685	0
Transfer from residential mortgage loans to other assets	2,100	2,265
Transfer from investments in debt and equity of affiliates to CMBS	$ 11,769	$ 0

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 44,592	$ 31,468
Restricted cash	5,108	30,785
Restricted cash included assets held for sale - Single-family rental properties, net	0	5,588
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 49,700	$ 67,841

Organization

Organization	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization AG Mortgage Investment Trust, Inc. (the "Company") was incorporated in the state of Maryland on March 1, 2011. The Company is a hybrid mortgage REIT that opportunistically invests in a diversified risk adjusted portfolio of agency investments and credit investments, which contain the asset classes further described below. Residential mortgage-backed securities ("RMBS") include mortgage pass-through certificates or collateralized mortgage obligations ("CMOs") representing interests in or obligations backed by pools of residential mortgage loans issued or guaranteed by a U.S. government-sponsored entity such as Fannie Mae or Freddie Mac (collectively, "GSEs"), or any agency of the U.S. Government such as Ginnie Mae (collectively, "Agency RMBS"). The principal and interest payments on Agency RMBS securities have an explicit guarantee by either an agency of the U.S. government or a U.S. government-sponsored entity. Non-Agency RMBS represent fixed- and floating-rate RMBS issued by entities or organizations other than a GSE or agency of the U.S. government, or that are collateralized by non-U.S. mortgages, including investment grade (AAA through BBB) and non-investment grade classes (BB and below). The mortgage loan collateral for Non-Agency RMBS consists of residential mortgage loans that do not generally conform to underwriting guidelines issued by U.S. government agencies or U.S. government-sponsored entities or are non-U.S. mortgages. Non-Agency RMBS also includes securities issued by companies whose primary assets are land and real estate. Asset Backed Securities ("ABS") are securitized investments for which the underlying assets are diverse, not only representing real estate related assets. Commercial Mortgage Backed Securities ("CMBS") represent investments of fixed- and floating-rate CMBS, including investment grade (AAA through BBB) and non-investment grade classes (BB and below), secured by, or evidencing an ownership interest in, a single commercial mortgage loan or a pool of commercial mortgage loans. Conduit CMBS are CMBS that are collateralized by multiple commercial loans and multiple borrowers. Single-Asset/Single-Borrower securities are CMBS which securitize a single loan that is backed by a single asset (usually a large commercial property) or by a pool of cross collateralized mortgage obligations to a single borrower or related borrowers. The Company’s Non-Agency RMBS, CMBS and ABS portfolios are generally not issued or guaranteed by Fannie Mae, Freddie Mac or any agency of the U.S. Government, or are collateralized by non-U.S. mortgages and are therefore subject to credit risk. Collectively, the Company refers to Agency RMBS, Non-Agency RMBS, ABS and CMBS asset types as "real estate securities" or "securities." Residential mortgage loans refer to performing, re-performing and non-performing loans secured by a first lien mortgage on residential mortgaged property located in any of the 50 states of the United States or in the District of Columbia. Commercial loans are secured by an interest in commercial real estate and represent a contractual right to receive money on demand or on fixed or determinable dates. The Company refers to its residential and commercial mortgage loans as "mortgage loans" or "loans." Excess MSRs refer to the excess servicing spread related to mortgage servicing rights, whose underlying collateral is securitized in a trust either held by a U.S. government agency or GSE ("Agency Excess MSR") or not held by a U.S. government agency or GSE ("Credit Excess MSR"). Agency investments include Agency RMBS and Agency Excess MSRs, and credit investments include Non-Agency RMBS, ABS, CMBS, loans, and Credit Excess MSRs. Prior to December 31, 2019, the Company conducted its business through the following segments; (i) Securities and Loans and (ii) Single-Family Rental Properties. On November 15, 2019, the Company sold its portfolio of single-family rental properties ("SFR portfolio") to a third party and no longer separated its business into segments. The sale of the Company's SFR portfolio has met the criteria for discontinued operations. Accordingly, for all current and prior periods presented, the related assets and liabilities are presented as assets and liabilities held for sale on the consolidated balance sheets and the related operating results are presented as income/(loss) from discontinued operations on the consolidated statement of operations. See Note 14 for further details. The Company is externally managed by AG REIT Management, LLC, a Delaware limited liability company (the "Manager"), a wholly-owned subsidiary of Angelo, Gordon & Co., L.P. ("Angelo Gordon"), a privately-held, SEC-registered investment adviser, pursuant to a management agreement. The Manager, pursuant to a delegation agreement dated as of June 29, 2011, has delegated to Angelo Gordon the overall responsibility of its day-to-day duties and obligations arising under the management agreement. The Company conducts its operations to qualify and be taxed as a real estate investment trust ("REIT") under the Internal Revenue Code of 1986, as amended (the "Code"). The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. COVID-19 Impact On March 11, 2020, the World Health Organization declared the outbreak of the novel coronavirus ("COVID-19") a pandemic. On March 13, 2020, the U.S. declared a national emergency concerning the COVID-19 pandemic, and several states and municipalities have subsequently declared public health emergencies. These conditions have caused, and continue to cause, a significant disruption in the U.S. and world economies. To slow the spread of COVID-19, many countries, including the U.S., have implemented social distancing measures, which have substantially prohibited large gatherings, including at sporting events, religious services and schools. Further, many regions, including the majority of U.S. states, implemented additional measures, such as shelter-in-place and stay-at-home orders. Many businesses moved to a remote working environment, temporarily suspended operations, laid off a significant percentage of their workforce and/or shut down completely. Moreover, the COVID-19 pandemic and certain of the actions taken to reduce its spread have resulted in lost business revenue, rapid and significant increases in unemployment, changes in consumer behavior and significant reductions in liquidity and the fair value of many assets, including those in which the Company invests. Although many of the government restrictions were relaxed over the summer and early fall, these conditions, or some level thereof, are expected to continue over the near term and may continue into 2021, depending on state and local outbreaks and the success of availability of an effective vaccine. Beginning in mid-March, the global pandemic associated with COVID-19 and related economic conditions caused financial and mortgage-related asset markets to come under extreme duress, resulting in credit spread widening, a sharp decrease in interest rates and unprecedented illiquidity in repurchase agreement financing and mortgage-backed securities ("MBS") markets. The illiquidity was exacerbated by inadequate demand for MBS among primary dealers due to balance sheet constraints. These events, in turn, resulted in declines in the value of our assets and margin calls from the Company's repurchase agreement financing counterparties. In order to satisfy the margin calls, the Company sold a significant portion of its investments resulting in a material adverse impact on book value, earnings and financial position. The Company's book value decreased from $17.61 at December 31, 2019 to $3.34 at September 30, 2020. In an effort to manage the Company's portfolio through this unprecedented turmoil in the financial markets and improve liquidity, the Company executed the following during the nine months ended September 30, 2020: • The Company reduced its investment portfolio from $4.0 billion at December 31, 2019 to $903.7 million at September 30, 2020 through sales, directly or as a result of financing counterparty seizures. • The Company terminated its entire portfolio of pay-fixed, receive-variable interest rate swaps, recognizing net realized losses of $(65.4) million. • The Company reduced its outstanding financing arrangements from $3.2 billion at December 31, 2019 to $225.5 million at September 30, 2020, resulting in a decline of its overall leverage ratio from 4.1x to 1.8x. The Company executed the following during the three months ended September 30, 2020: • The Company purchased $250.1 million of Agency RMBS and $60.2 million of Residential Mortgage Loans. • The Company participated in a non-rated securitization, in which Residential Mortgage Loans with a fair value of $199.6 million were securitized, converting financing from recourse financing that was mark-to-market with respect to margin calls to non-recourse financing that is no longer mark-to-market with respect to margin calls. • The Company sold real estate securities for proceeds of $38.8 million, residential mortgage loans for proceeds of $6.2 million, commercial loans for proceeds of $2.7 million and Excess MSRs for proceeds of $8.5 million. • The Company, alongside private funds under the management of Angelo Gordon, participated through its unconsolidated ownership interest in MATT, as defined below, in a rated Non-QM loan securitization, in which Non-QM loans with a fair value of $226.0 million were securitized. Certain senior tranches in the securitization were sold to third parties with the Company and private funds under the management of Angelo Gordon retaining the subordinate tranches, which had a fair value of $24.3 million as of September 30, 2020. The Company has a 44.6% interest in the retained subordinate tranches. • On September 24, 2020, the Company issued (i) 1,215,370 shares of common stock to the Manager in full satisfaction of the deferred base management fee of $3.8 million payable by the Company in respect to the first and second quarters of 2020 and (ii) 154,500 shares of common stock in satisfaction of $0.5 million of the base management fee payable by the Company in respect to the third quarter of 2020. The shares of Common Stock issued to the Manager were valued at $3.15 per share based on the midpoint of the estimated range of the Company’s book value per share as of August 31, 2020. The remaining third quarter management fee will be paid in the normal course of business. The full impact of COVID-19 on the mortgage REIT industry, the credit markets and consequently on the Company’s financial condition and results of operations for future periods is uncertain and cannot be predicted at the current time as it depends on several factors beyond the control of the Company including, but not limited to (i) the uncertainty around the severity, duration and spread of the outbreak, (ii) the effectiveness of the United States and global public health response, (iii) the pandemic’s impact on the U.S. and global economies, (iv) the timing, scope and effectiveness of additional governmental responses to the pandemic, including the availability of a treatment or vaccination for COVID-19, (v) the impact of government interventions, and (vi) the negative impact on the Company's borrowers, asset values and cost of capital.

Summary of significant accounti

Summary of significant accounting policies	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies The accompanying unaudited consolidated financial statements and related notes have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial reporting and the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. In the opinion of management, all adjustments considered necessary for a fair statement of the Company’s financial position, results of operations and cash flows have been included for the interim period and are of a normal and recurring nature. The operating results presented for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the entire year. Certain reclassifications have been made to the prior year's consolidated financial statements to conform to the three months ended September 30, 2020 presentation, primarily in the Consolidated Statement of Operations and all related notes in which prior periods have been retrospectively adjusted to reflect the classification of the operations of the Company's SFR portfolio to discontinued operations. The Company also included additional detail on certain asset classes within the real estate securities portfolio given the Company's reduction in portfolio size. The accompanying unaudited consolidated financial statements and related notes have been prepared assuming that the Company will continue as a going concern. The Company has conducted a going concern analysis which has a look-forward period of one year from the financial statement issuance date. The Company expects its current cash resources, operating cash flows, positive equity on its remaining assets, and its ability to obtain financing will be sufficient to sustain operations for a period greater than one year after the issuance of the date of this report. Management believes that the Company will have sufficient liquidity to meet its obligations, as they become due, for the next twelve months. To the extent that actual available cash differs materially from the current cash flow forecast, management has the ability to consider certain asset sales to increase the amount of available cash. The global impact of the COVID-19 pandemic continues to evolve as state and local governments adopted a number of measures and recommendations in response to the outbreak, including imposing travel restrictions, "shelter in place" restrictions, curfews, canceling events, banning large gatherings, closing non-essential businesses and generally promoting social distancing. Although certain states and localities have recently begun easing some of these new measures and providing recommendations regarding recommencing economic activity, renewed outbreaks of COVID-19 may continue to occur and result in additional or different policy action at the federal, state and local level in the near future. The COVID-19 pandemic and resulting emergency measures has led (and may continue to lead) to significant disruptions in the global supply chain, global capital markets, the economy of the U.S. and the economies of other countries impacted by COVID-19. The rapid development and fluidity of this situation precludes any prediction as to the ultimate adverse impact of COVID-19 on economic and market conditions. The Company believes the estimates and assumptions underlying our consolidated financial statements are reasonable and supportable based on the information available as of September 30, 2020; however, uncertainty over the ultimate impact COVID-19 will have on the global economy generally, and the Company's business in particular, makes any estimates and assumptions as of September 30, 2020 inherently less certain than they would be absent the current and potential impacts of COVID-19. Accordingly, it is reasonably possible that actual conditions could be different than anticipated in those estimates, which could materially impact the Company’s results of operations and its financial condition and therefore the going concern analysis. Cash and cash equivalents Cash is comprised of cash on deposit with financial institutions. The Company classifies highly liquid investments with original maturities of three months or less from the date of purchase as cash equivalents. Cash equivalents includes cash invested in money market funds. As of September 30, 2020, the Company held $44.6 million of cash and cash equivalents, none of which were cash equivalents. As of December 31, 2019, the Company held $81.7 million of cash and cash equivalents, of which $53.2 million were cash equivalents. The Company places its cash with high credit quality institutions to reduce credit risk exposure. Cash pledged to the Company as collateral is unrestricted in use and, accordingly, is included as a component of "Cash and cash equivalents" on the consolidated balance sheets. Any cash held by the Company as collateral is included in the "Other liabilities" line item on the consolidated balance sheets and in cash flows from financing activities on the consolidated statement of cash flows. Due to broker, which is included in the "Other liabilities" line item on the consolidated balance sheets, does not include variation margin received on centrally cleared derivatives. See Note 8 for more detail. Any cash due to the Company in the form of principal payments is included in the "Other assets" line item on the consolidated balance sheets and in cash flows from operating activities on the consolidated statement of cash flows. Restricted cash Restricted cash includes cash pledged as collateral for clearing and executing trades, derivatives, and financing arrangements, as well as restricted cash deposited into accounts held at certain consolidated trusts. Prior to the disposition of the Company's SFR portfolio, restricted cash also included cash deposited into accounts related to rent deposits and collections, security deposits, property taxes, insurance premiums, interest expenses, property management fees and capital expenditures. Restricted cash is not available to the Company for general corporate purposes. Restricted cash may be returned to the Company when the related collateral requirements are exceeded or at the maturity of the derivative or financing arrangement. Restricted cash is carried at cost, which approximates fair value. Restricted cash does not include variation margin pledged on centrally cleared derivatives. See Note 8 for more detail. Offering costs The Company has incurred offering costs in connection with common stock offerings, registration statements, preferred stock offerings and exchanges. Where applicable, the offering costs were paid out of the proceeds of the respective offerings. Offering costs in connection with common stock offerings and costs in connection with registration statements have been accounted for as a reduction of additional paid-in capital. Offering costs in connection with preferred stock offerings have been accounted for as a reduction of their respective gross proceeds. Exchange costs in connection with the Company's preferred stock exchanges have been accounted for as a reduction to the Company's retained earnings. Use of estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results may differ from those estimates. See Note 1 under " COVID-19 Impact " for more detail. Earnings/(Loss) per share In accordance with the provisions of Accounting Standards Codification ("ASC") 260, "Earnings per Share," the Company calculates basic income/(loss) per share by dividing net income/(loss) available to common stockholders for the period by weighted average shares of the Company’s common stock outstanding for that period. Diluted income per share takes into account the effect of dilutive instruments, such as stock options, warrants, unvested restricted stock and unvested restricted stock units but uses the average share price for the period in determining the number of incremental shares that are to be added to the weighted average number of shares outstanding. In periods in which the Company records a loss, potentially dilutive securities are excluded from the diluted loss per share calculation, as their effect on loss per share is anti-dilutive. See Note 9 for aggregate amounts of arrearages in cumulative preferred dividends and Note 12 for further detail on the Company’s common and preferred stock. Valuation of financial instruments The fair value of the financial instruments that the Company records at fair value is determined by the Manager, subject to oversight of the Company’s Board of Directors, and in accordance with ASC 820, "Fair Value Measurements and Disclosures." When possible, the Company determines fair value using independent data sources. ASC 820 establishes a hierarchy that prioritizes the inputs to valuation techniques giving the highest priority to readily available unadjusted quoted prices in active markets for identical assets (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements) when market prices are not readily available or reliable. The three levels of the hierarchy under ASC 820 are described below: • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Prices determined using other significant observable inputs. These may include quoted prices for similar securities, interest rates, prepayment speeds, credit risk and others. • Level 3 – Prices determined using significant unobservable inputs. In situations where quoted prices or observable inputs are unavailable (for example, when there is little or no market activity for an investment at the end of the period), unobservable inputs may be used. Unobservable inputs reflect the Company’s assumptions about the factors that market participants would use in pricing an asset or liability, and would be based on the best information available. Transfers between levels are assumed to occur at the beginning of the reporting period. At the beginning of the first quarter of 2020, the Manager completed a data collection and analysis effort, which supported an update to its Leveling policy under ASC 820. Among the data collected and analyzed were: (i) reports from TRACE, FINRA’s Trade Reporting and Compliance Engine, that reports over-the-counter secondary market transactions in eligible fixed income securities, (ii) information from pricing vendors regarding valuation approaches and observability of market color, (iii) data points collected from discussions with industry sources, including peer firms and audit firms, and (iv) its own data from back testing vendor pricing against its own trades. After analyzing this data, the Manager concluded that there was sufficient observability of market inputs used by its third-party pricing services for certain RMBS and CMBS positions previously categorized as Level 3 to meet the criteria for a Level 2 classification. The Company considered whether the volatile market conditions related to the COVID-19 pandemic would have an impact on its Leveling policy under ASC 820, as amended on January 1, 2020. Based on due diligence, there have been no significant changes in any of the pricing services’ fair value methodologies or processes as a result of COVID-19. The Company does not believe the pricing services’ ability to determine fair values has been adversely impacted. As a result, the Company concluded there was no migration from Level 2 to Level 3 as a result of COVID-19. Accounting for real estate securities Investments in real estate securities are recorded in accordance with ASC 320-10, "Investments – Debt and Equity Securities," ASC 325-40, "Beneficial Interests in Securitized Financial Assets," or ASC 310-30, "Loans and Debt Securities Acquired with Deteriorated Credit Quality." The Company has chosen to make a fair value election pursuant to ASC 825, "Financial Instruments" for its real estate securities portfolio. Real estate securities are recorded at fair value on the consolidated balance sheets and the periodic change in fair value is recorded in current period earnings on the consolidated statement of operations as a component of "Unrealized gain/(loss) on real estate securities and loans, net." Real estate securities acquired are shown in the line item "Purchase of real estate securities" on the consolidated statement of cash flows. Purchases and sales of real estate securities are recorded on the trade date. These investments meet the requirements to be classified as available for sale under ASC 320-10-25 which requires the securities to be carried at fair value on the consolidated balance sheets with changes in fair value recorded to other comprehensive income, a component of stockholders’ equity. Electing the fair value option allows the Company to record changes in fair value in the consolidated statement of operations, which, in management’s view, more appropriately reflects the results of operations for a particular reporting period as all securities activities will be recorded in a similar manner. The Company recognizes certain upfront costs and fees relating to securities for which the fair value option has been elected in current period earnings as incurred and does not defer those costs, which is in accordance with ASC 825-10-25. When the Company purchases securities with evidence of credit deterioration since origination, it will analyze the securities to determine if the guidance found in ASC 310-30 is applicable. In June 2016, FASB issued ASU 2016-13, "Financial Instruments – Credit Losses" ("ASU 2016-13"). This new guidance significantly changes how entities will measure credit losses for most financial assets, including loans, that are not measured at fair value with changes in fair value recognized through net income. The Company adopted the new guidance as of January 1, 2020. The new guidance specifically excludes available-for-sale securities and loans measured at fair value, with changes in fair value recognized through net income. Accordingly, the impact of the new guidance on accounting for the Company's debt securities and loans is limited to recognition of effective yield which was historically impacted by other than temporary impairment recorded under current standards. As the new guidance eliminates the accounting for other than temporary impairment, this guidance has impacted the Company's unrealized and realized gain/(loss) amounts. As the Company measures its debt securities and loans at fair value with any changes recognized through net income and updates its estimate of the cash flows expected to be collected on these asset classes on at least a quarterly basis recognizing changes in cash flows in interest income prospectively through an adjustment of an asset’s yield over its remaining life, the adoption of the standard did not have a material impact to the Company’s consolidated financial statements. Prior to the adoption of ASU 2016-13, the Company accounted for its securities under ASC 310 and ASC 325 and evaluated securities for other-than-temporary impairment ("OTTI") on at least a quarterly basis. The determination of whether a security was other-than-temporarily impaired involved judgments and assumptions based on subjective and objective factors. When the fair value of a real estate security was less than its amortized cost at the balance sheet date, the security was considered impaired, and the impairment was designated as either "temporary" or "other-than-temporary." When a real estate security was impaired, an OTTI was considered to have occurred if (i) the Company intended to sell the security (i.e., a decision has been made as of the reporting date) or (ii) it was more likely than not that the Company was required to sell the security before recovery of its amortized cost basis. If the Company intended to sell the security or if it was more likely than not that the Company was required to sell the real estate security before recovery of its amortized cost basis, the entire amount of the impairment loss, if any, was recognized in earnings as a realized loss and the cost basis of the security was adjusted to its fair value. Additionally, for securities accounted for under ASC 325-40 an OTTI was deemed to have occurred when there was an adverse change in the expected cash flows to be received and the fair value of the security was less than its carrying amount. In determining whether an adverse change in cash flows occurred, the present value of the remaining cash flows, as estimated at the initial transaction date (or the last date previously revised), was compared to the present value of the expected cash flows at the current reporting date. The estimated cash flows reflected those a "market participant" would use and included observations of current information and events, and assumptions related to fluctuations in interest rates, prepayment speeds and the timing and amount of potential credit losses. Cash flows were discounted at a rate equal to the current yield used to accrete interest income. Any resulting OTTI adjustments were reflected in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The determination as to whether an OTTI existed was subjective, given that such determination was based on information available at the time of assessment as well as the Company’s estimate of the future performance and cash flow projections for the individual security. As a result, the timing and amount of an OTTI constituted an accounting estimate that could change materially over time. Increases in interest income could have been recognized on a security on which the Company previously recorded an OTTI charge if the performance of such security subsequently improved. Sales of securities are driven by the Manager’s portfolio management process. The Manager seeks to mitigate risks including those associated with prepayments, defaults, severities, amongst others and will opportunistically rotate the portfolio into securities with more favorable attributes. Strategies may also be employed to manage net capital gains, which need to be distributed for tax purposes. Realized gains or losses on sales of securities, loans and derivatives are included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The cost of positions sold is calculated using a first in, first out ("FIFO") basis. Realized gains and losses are recorded in earnings at the time of disposition. Accounting for residential and commercial mortgage loans Investments in mortgage loans are recorded in accordance with ASC 310-10, "Receivables." At purchase, the Company may aggregate its mortgage loans into pools based on common risk characteristics. Once a pool of loans is assembled, its composition is maintained. The Company has chosen to make a fair value election pursuant to ASC 825 for its mortgage loan portfolio. Electing the fair value option allows the Company to record changes in fair value in the Consolidated Statement of Operations, which, in management's view, more appropriately reflects the results of operations for a particular reporting period as all loan activities will be recorded in a similar manner. As such, loans are recorded at fair value on the consolidated balance sheets and any periodic change in fair value is recorded in current period earnings on the consolidated statement of operations as a component of "Unrealized gain/(loss) on real estate securities and loans, net." The Company recognizes certain upfront costs and fees relating to loans for which the fair value option has been elected in current period earnings as incurred and does not defer those costs, which is in accordance with ASC 825-10-25. Purchases and sales of mortgage loans are recorded on the settlement date, concurrent with the completion of due diligence and the removal of any contingencies. Prior to the settlement date, the Company will include commitments to purchase loans within the Commitments and Contingencies footnote to the financial statements. The Company amortizes or accretes any premium or discount over the life of the loans utilizing the effective interest method. On at least a quarterly basis, the Company evaluates the collectability of both interest and principal on its loans to determine whether they are impaired. A loan or pool of loans is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the existing contractual terms. Income recognition is suspended for loans at the earlier of the date at which payments become 90-days past due or when, in the opinion of the Manager, a full recovery of income and principal becomes doubtful. When the ultimate collectability of the principal of an impaired loan or pool of loans is in doubt, all payments are applied to principal under the cost recovery method. When the ultimate collectability of the principal of an impaired loan is not in doubt, contractual interest is recorded as interest income when received, under the cash basis method until an accrual is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. A loan is written off when it is no longer realizable and/or legally discharged. When the Company purchases mortgage loans with evidence of credit deterioration since origination and it determines that it is probable it will not collect all contractual cash flows on those loans, it will apply the guidance found in ASC 310-30. Mortgage loans that are delinquent 60 or more days are considered non-performing. The Company updates its estimate of the cash flows expected to be collected on at least a quarterly basis for loans accounted for under ASC 310-30. In estimating these cash flows, there are a number of assumptions that will be subject to uncertainties and contingencies including both the rate and timing of principal and interest receipts, and assumptions of prepayments, repurchases, defaults and liquidations. If based on the most current information and events it is probable that there is a significant increase in cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, the Company will recognize these changes prospectively through an adjustment of the loan’s yield over its remaining life. The Company will adjust the amount of accretable yield by reclassification from the nonaccretable difference. The adjustment is accounted for as a change in estimate in conformity with ASC 250, "Accounting Changes and Error Corrections" with the amount of periodic accretion adjusted over the remaining life of the loan. Prior to the adoption of ASU 2016-13, decreases in cash flows expected to be collected from previously projected cash flows, which included all cash flows originally expected to be collected by the investor plus any additional cash flows expected to be collected arising from changes in estimate after acquisition, could have been recognized as impairment. Increases in interest income could have been recognized on a loan on which the Company previously recorded an OTTI charge if the performance of such loan subsequently improved. As previously stated, the Company adopted ASU 2016-13 as of January 1, 2020. The new guidance specifically excludes available-for-sale securities and loans measured at fair value with changes in fair value recognized through net income. Accordingly, the impact of the new guidance on accounting for the Company's debt securities and loans is limited to recognition of effective yield which was previously impacted by other than temporary impairment recorded under previous standards. As the new guidance eliminates the accounting for other than temporary impairment, this guidance has impacted the Company's recorded unrealized and realized gain/(loss) amounts. As the Company measures its debt securities and loans at fair value with any changes recognized through net income and updates its estimate of the cash flows expected to be collected on these asset classes on at least a quarterly basis recognizing changes in cash flows in interest income prospectively through an adjustment of an asset’s yield over its remaining life, the adoption of the standard did not have a material impact to the Company’s consolidated financial statements. Investments in debt and equity of affiliates The Company’s unconsolidated ownership interests in affiliates are accounted for using the equity method. A majority of the Company’s investments held through affiliated entities are comprised of real estate securities, Excess MSRs, loans, and certain derivatives. These types of investments may also be held directly by the Company. These entities have chosen to make a fair value election on their financial instruments and certain financing arrangements pursuant to ASC 825; as such, the Company will treat these financial instruments and financing arrangements consistently with this election. On December 9, 2015, the Company, alongside private funds managed by Angelo Gordon, through AG Arc LLC, one of the Company’s indirect subsidiaries ("AG Arc"), formed Arc Home LLC ("Arc Home"). In June 2016, Arc Home closed on the acquisition of a Fannie Mae, Freddie Mac, FHA, VA and Ginnie Mae seller/servicer of residential mortgages. Through this subsidiary, Arc Home originates conforming, Government, Jumbo, Non-QM, and other non-conforming residential mortgage loans, retains the mortgage servicing rights associated with the loans it originates, and purchases additional mortgage servicing rights from third-party sellers. The Company has chosen to make a fair value election with respect to its investment in AG Arc pursuant to ASC 825. On August 29, 2017, the Company, alongside private funds managed by Angelo Gordon, formed Mortgage Acquisition Holding I LLC ("MATH") to conduct a residential mortgage investment strategy. MATH in turn sponsored the formation of an entity called Mortgage Acquisition Trust I LLC ("MATT") to purchase predominantly "Non-QM" loans, which are residential mortgage loans that are not deemed "qualified mortgage," or "QM," loans under the rules of the Consumer Finance Protection Bureau. Non-QM loans are not eligible for delivery to Fannie Mae, Freddie Mac, or Ginnie Mae. MATT has made an election to be treated as a real estate investment trust beginning with the 2018 tax year. On April 3, 2020, the Company, alongside private funds under the management of Angelo Gordon, restructured its financing arrangements in MATT ("Restructured Financing Arrangement"). The Restructured Financing Arrangement requires all principal and interest on the underlying assets in MATT be used to pay down principal and interest on the outstanding financing arrangement. As of April 3, 2020, the Restructured Financing Arrangement is no longer a mark-to-market facility with respect to margin calls and is non-recourse to the Company. The Restructured Financing Arrangement provides for a termination date of October 1, 2021. At the earlier of the termination date or the securitization or sale by the Company of the remaining assets subject to the Restructured Financing Arrangement, the financing counterparty (which is a non-affiliate) will be entitled to 35% of the remaining equity in the assets. The Company evaluated this restructuring and concluded it was an extinguishment of debt. MATT has chosen to make a fair value election on this financing arrangement, and the Company will treat this arrangement consistently with this election. On May 15, 2019 and November 14, 2019, the Company, alongside private funds managed by Angelo Gordon, formed LOT SP I LLC and LOT SP II LLC, respectively, (collectively, "LOTS"). LOTS were formed to originate first mortgage loans to third party land developers and home builders for the acquisition and horizontal development of land ("Land Related Financing"). The below table reconciles the fair value of investments to the "Investments in debt and equity of affiliates" line item on the Company's consolidated balance sheet (in thousands). September 30, 2020 December 31, 2019 Assets Liabilities Equity Assets Liabilities Equity Real Estate Securities, Excess MSRs and Loans, at fair value (1)(2) $ 217,643 $ (123,861) $ 93,782 $ 373,126 $ (257,068) $ 116,058 AG Arc, at fair value 41,436 — 41,436 28,546 — 28,546 Cash and Other assets/(liabilities) 4,925 (1,454) 3,471 12,953 (1,246) 11,707 Investments in debt and equity of affiliates $ 264,004 $ (125,315) $ 138,689 $ 414,625 $ (258,314) $ 156,311 (1) Certain loans held in securitized form are presented net of non-recourse securitized debt. (2) Within Real Estate Securities, Excess MSRs and Loans is $152.5 million and $254.3 million of fair value of Non-QM loans held in MATT at September 30, 2020 and December 31, 2019, respectively. The related financing on the Non-QM loans was $117.0 million and $200.3 million at September 30, 2020 and December 31, 2019, respectively. As of September 30, 2020, Non-QM Loans excluded loans with an unpaid principal balance of $24.5 million whereby an affiliate of MATT has the right, but not the obligation, to repurchase loans from a trust that are 90 days or more delinquent at its discretion. These loans, which are eligible to be repurchased, would be recorded on the balance sheet of MATT, an unconsolidated equity method investee of the Company, with a corresponding and offsetting liability. Additionally, there is $25.5 million and $17.0 million of fair value of Land Related Financing held in LOTS at September 30, 2020 and December 31, 2019, respectively. The Company’s investments in debt and equity of affiliates are recorded at fair value on the consolidated balance sheets in the "Investments in debt and equity of affiliates" line item and periodic changes in fair value are recorded in current period earnings on the consolidated statement of operations as a component of "Equity in earnings/(loss) from affiliates." Capital contributions, distributions and profits and losses of such entities are allocated in accordance with the terms of the applicable agreements. Accounting for excess mortgage servicing rights The Company has acquired the right to receive the excess servicing spread related to Excess MSRs. The Company has chosen to make a fair value election pursuant to ASC 825 for Excess MSRs. Excess MSRs are recorded at fair value on the consolidated balance sheets and any periodic change in fair value is recorded in current period earnings on the consolidated statement of operations as a component of "Unrealized gain/(loss) on derivative and other instruments, net." The Company amortizes or accretes any premium or discount over the life of the related Excess MSRs utilizing the effective interest method. On at least a quarterly basis, the Company evaluates the collectability of interest of its Excess MSRs to determine whether they are impaired. The Company updates its estimate of the cash flows expected to be collected on at least a quarterly basis for Excess MSRs. In estimating these cash flows, there are a number of assumptions that will be subject to uncertainties and contingencies including both the rate and timing of interest receipts, and assumptions of prepayments, repurchases, defaults and liquidations. If there is a significant increase in expected cash flows over what was previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, the Company will recognize these changes prospectively through an adjustment of the Excess MSR’s yield over its remaining life. Prior to the adoption of ASU 2016-13, decreases in cash flows expected to be collected from previously projected cash flows, which included all cash flows originally expected to be collected by the investor plus any additional cash flows expected to be collected arising from changes in estimate after acquisition, could have been recognized as impairment. Increases in interest income could have been recognized on an Excess MSR on which the Company previously recorded an OTTI charge if the performance of such Excess MSR subsequently improved. As previously stated, the Company adopted ASU 2016-13 as of January 1, 2020. The new guidance specifically excludes available-for-sale securities, loans and Excess MSRs measured at fair v

Real Estate Securities

Real Estate Securities	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Real Estate Securities	Real Estate Securities The following tables detail the Company’s real estate securities portfolio as of September 30, 2020 and December 31, 2019 ($ in thousands). The gross unrealized gains/(losses) stated in the tables below represent inception to date unrealized gains/(losses). September 30, 2020 Gross Unrealized Weighted Average Current Face Premium / (Discount) Amortized Cost Gains Losses Fair Value Coupon (1) Yield Agency RMBS: 30 Year Fixed Rate $ 237,142 $ 12,760 $ 249,902 $ 258 $ (37) $ 250,123 2.21 % 1.17 % Credit Investments: Residential Investments Prime 14,104 (6,356) 7,748 660 (46) 8,362 3.69 % 7.64 % Alt-A/Subprime 16,471 (9,676) 6,795 2,951 — 9,746 4.25 % 5.25 % Credit Risk Transfer 15,523 — 15,523 — (3,489) 12,034 4.70 % 4.60 % Non-U.S. RMBS 2,869 811 3,680 40 (276) 3,444 6.16 % 6.08 % Non-Agency RMBS Interest Only 171,444 (171,365) 79 281 (48) 312 0.55 % 14.42 % Re/Non-Performing Securities 2,758 (539) 2,219 128 (33) 2,314 5.25 % 9.99 % Land Related Financing 6,989 (176) 6,813 246 — 7,059 7.75 % 8.33 % Total Residential Investments: 230,158 (187,301) 42,857 4,306 (3,892) 43,271 2.34 % 6.42 % Commercial Investments Conduit 4,925 (1,081) 3,844 — (781) 3,063 4.78 % 11.88 % Single-Asset/Single-Borrower 50,480 (1,543) 48,937 829 (11,588) 38,178 4.17 % 4.84 % Freddie Mac K-Series CMBS 22,572 (12,221) 10,351 48 (1,763) 8,636 3.84 % 8.98 % CMBS Interest Only (2) 687,293 (683,075) 4,218 205 (72) 4,351 0.10 % 7.51 % Total Commercial Investments: 765,270 (697,920) 67,350 1,082 (14,204) 54,228 0.44 % 6.11 % Total Credit Investments: 995,428 (885,221) 110,207 5,388 (18,096) 97,499 0.72 % 6.25 % Total $ 1,232,570 $ (872,461) $ 360,109 $ 5,646 $ (18,133) $ 347,622 1.04 % 2.60 % (1) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. (2) Comprised of Freddie Mac K-Series interest-only bonds. December 31, 2019 Gross Unrealized Weighted Average Current Face Premium / (Discount) Amortized Cost Gains Losses Fair Value Coupon (1) Yield Agency RMBS: 30 Year Fixed Rate $ 2,125,067 $ 59,123 $ 2,184,190 $ 57,404 $ (296) $ 2,241,298 3.73 % 3.17 % Interest Only 476,192 (403,248) 72,944 2,330 (1,133) 74,141 3.93 % 5.87 % Total Agency RMBS: 2,601,259 (344,125) 2,257,134 59,734 (1,429) 2,315,439 3.77 % 3.26 % Credit Investments: Residential Investments Prime 297,932 (84,876) 213,056 29,052 (221) 241,887 4.92 % 7.44 % Alt-A/Subprime 141,464 (30,859) 110,605 12,234 (127) 122,712 4.40 % 6.89 % Credit Risk Transfer 270,397 591 270,988 8,972 (5) 279,955 5.17 % 5.27 % Non-U.S. RMBS 44,867 9,473 54,340 3,391 — 57,731 3.21 % 3.58 % Non-Agency RMBS Interest Only 209,362 (207,948) 1,414 — (340) 1,074 0.77 % 5.96 % Re/Non-Performing Securities 5,966 (1,965) 4,001 1,180 — 5,181 5.18 % 19.20 % Land Related Financing 8,628 (212) 8,416 514 — 8,930 7.75 % 8.26 % Total Residential Investments: 978,616 (315,796) 662,820 55,343 (693) 717,470 4.40 % 6.28 % Commercial Investments Conduit 72,318 (9,181) 63,137 811 (602) 63,346 4.24 % 5.57 % Single-Asset/Single-Borrower 204,702 (5,606) 199,096 879 (304) 199,671 5.09 % 5.57 % Freddie Mac K-Series CMBS 208,693 (119,809) 88,884 17,030 — 105,914 5.70 % 11.54 % CMBS Interest Only (2) 3,427,025 (3,382,273) 44,752 3,486 (246) 47,992 0.24 % 6.68 % Total Commercial Investments: 3,912,738 (3,516,869) 395,869 22,206 (1,152) 416,923 0.60 % 7.21 % Total Credit Investments: 4,891,354 (3,832,665) 1,058,689 77,549 (1,845) 1,134,393 1.31 % 6.62 % Total $ 7,492,613 $ (4,176,790) $ 3,315,823 $ 137,283 $ (3,274) $ 3,449,832 2.20 % 4.37 % (1) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. (2) Comprised of Freddie Mac K-Series interest-only bonds. As described in Note 2, prior to the adoption of ASU 2016-13, the Company evaluated securities for OTTI on at least a quarterly basis. The determination of whether a security was other-than-temporarily impaired involved judgments and assumptions based on subjective and objective factors. When the fair value of a real estate security was less than its amortized cost at the balance sheet date, the security was considered impaired, and the impairment was designated as either "temporary" or "other-than-temporary." For the three months ended September 30, 2019, the Company recognized an OTTI charge of $3.1 million on its securities, which is included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The Company recorded $3.1 million of OTTI due to an adverse change in cash flows on certain securities where the fair values of the securities were less than their carrying amounts. Of the $3.1 million of OTTI recorded, $2.2 million related to securities where OTTI was not recognized in a prior year. For the nine months ended September 30, 2019, the Company recognized an OTTI charge of $14.2 million on its securities, which is included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The Company recorded $14.2 million of OTTI due to an adverse change in cash flows on certain securities where the fair values of the securities were less than their carrying amounts. Of the $14.2 million of OTTI recorded, $3.4 million related to securities where OTTI was not recognized in a prior year. The following tables detail the weighted average life of our real estate securities as of September 30, 2020 and December 31, 2019 ($ in thousands): September 30, 2020 Agency RMBS Credit Investments Weighted Average Life (1) Fair Value Amortized Cost Weighted Average Coupon Fair Value Amortized Cost Weighted Average Coupon (2) Less than or equal to 1 year $ — $ — — % $ 16,576 $ 21,741 1.33 % Greater than one year and less than or equal to five years 98,388 98,372 2.43 % 25,931 32,723 0.45 % Greater than five years and less than or equal to ten years 151,735 151,530 2.08 % 17,945 18,740 0.38 % Greater than ten years — — — 37,047 37,003 4.31 % Total $ 250,123 $ 249,902 2.21 % $ 97,499 $ 110,207 0.72 % (1) This is based on projected life. Typically, actual maturities of mortgage-backed securities are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. December 31, 2019 Agency RMBS Credit Investments Weighted Average Life (1) Fair Value Amortized Cost Weighted Average Coupon Fair Value Amortized Cost Weighted Average Coupon (2) Less than or equal to 1 year $ — $ — — % $ 82,474 $ 82,273 0.56 % Greater than one year and less than or equal to five years 313,855 302,520 4.01 % 525,192 508,038 1.29 % Greater than five years and less than or equal to ten years 2,001,584 1,954,614 3.71 % 296,665 263,300 1.06 % Greater than ten years — — — 230,062 205,078 5.46 % Total $ 2,315,439 $ 2,257,134 3.77 % $ 1,134,393 $ 1,058,689 1.31 % (1) This is based on projected life. Typically, actual maturities of mortgage-backed securities are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. For the three months ended September 30, 2020, the Company sold 13 securities for total proceeds of $38.8 million, recording realized gains of $0.7 million and realized losses of $4.5 million. For the nine months ended September 30, 2020, the Company sold, directly or as a result of financing counterparty seizures, 341 securities for total proceeds of $2.7 billion, recording realized gains of $54.0 million and losses of $180.4 million. For the three months ended September 30, 2019, the Company sold 25 securities for total proceeds of $231.5 million and entered into 3 unsettled security sales for additional proceeds of $4.5 million, recording realized gains of $7.1 million and realized losses of $2.5 million. For the nine months ended September 30, 2019, the Company sold 71 securities for total proceeds of $677.6 million and entered into 3 unsettled security sales for additional proceeds of $4.5 million, recording realized gains of $15.2 million and realized losses of $4.8 million. The following table details certain information related to the December 2014 VIE and August 2018 VIE as further described in Note 2 as of December 31, 2019 (in thousands). As of September 30, 2020, the Company did not hold any interest in these VIEs. December 31, 2019 Assets Real estate securities, at fair value: Non-Agency $ 13,838 CMBS 94,500 Other assets 808 Total assets $ 109,146 Liabilities Financing arrangements $ 70,712 Securitized debt, at fair value 7,230 Other liabilities 3,553 Total liabilities $ 81,495 The holders of the consolidated tranche of the December 2014 VIE, shown within the Non-Agency line item above, have no recourse to the general credit of the Company and the Company has no obligation to provide any other explicit or implicit support to the December 2014 VIE. Except for restricted cash, shown within the Other assets line item above, assets held by the August 2018 VIE were not restricted and could have been used to settle any obligations of the Company as of December 31, 2019. The liabilities of the August 2018 VIE were recourse to the Company and could be satisfied with assets of the Company as of December 31, 2019. As the Company does not hold any interest in the August 2018 VIE as of September 30, 2020, the liabilities of the August 2018 VIE are no longer recourse to the Company. The following table details certain information related to the December 2014 VIE as of December 31, 2019 ($ in thousands): Weighted Average Current Face Fair Value Coupon Yield Life (Years) (1) Consolidated tranche (2) $ 7,204 $ 7,230 3.46 % 4.11 % 1.96 Retained tranche 7,851 6,608 5.37 % 18.14 % 7.64 Total resecuritized asset (3) $ 15,055 $ 13,838 4.46 % 10.81 % 4.92 (1) This is based on projected life. Typically, actual maturities of investments and loans are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) As of December 31, 2019, the Company has recorded secured financing of $7.2 million on the consolidated balance sheets in the "Securitized debt, at fair value" line item. The Company recorded the proceeds from the issuance of the secured financing in the "Cash Flows from Financing Activities" section of the consolidated statement of cash flows at the time of securitization. (3) As of December 31, 2019, the fair market value of the total resecuritized asset is included in the Company’s consolidated balance sheets as "Non-Agency."

Loans

Loans	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans	Loans Residential mortgage loans In January 2020, the Company purchased a residential mortgage loan portfolio with a gross aggregate unpaid principal balance and a gross acquisition fair value of $481.7 million and $450.3 million, respectively. In September 2020, the Company purchased a residential mortgage loan portfolio with a gross aggregate unpaid principal balance and a gross acquisition fair value of $71.7 million and $60.2 million, respectively. This loan portfolio was simultaneously securitized and is included within the September 2020 VIE. For the three months ended September 30, 2020, the Company sold 52 loans for total proceeds of $6.2 million, recording realized gains of $0.3 million and realized losses of $0.6 million. For the nine months ended September 30, 2020, the Company sold 2,410 loans for total proceeds of $389.0 million, recording realized gains of $1.8 million and realized losses of $59.3 million. No loans were sold for the three months ended September 30, 2019. For the nine months ended September 30, 2019, the Company sold 79 loans for total proceeds of $12.8 million, recording realized gains of $1.0 million and realized losses $0.2 million. The Company has chosen to make a fair value election pursuant to ASC 825 for its residential mortgage loan portfolio. Unrealized gains and losses are recognized in current period earnings in the "Unrealized gain/(loss) on real estate securities and loans, net" line item. The gross unrealized gains/(losses) stated in the tables below represents inception to date unrealized gains/(losses). The table below details information regarding the Company’s residential mortgage loan portfolio as of September 30, 2020 and December 31, 2019 ($ in thousands): Gross Unrealized Weighted Average As of Unpaid Principal Balance Premium Amortized Cost Gains Losses Fair Value Coupon Yield Life September 30, 2020 $ 518,510 $ (72,943) $ 445,567 $ 3,786 $ (19,705) $ 429,648 3.64 % 5.17 % 6.76 December 31, 2019 464,041 (55,219) 408,822 9,065 (102) 417,785 4.09 % 5.72 % 7.36 (1) This is based on projected life. Typically, actual maturities of residential mortgage loans are shorter than stated contractual maturities. Maturities are affected by the lives of the underlying mortgages, periodic payments of principal and prepayments of principal. The table below details information regarding the Company’s residential mortgage loans as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Fair Value Unpaid Principal Balance Fair Value Unpaid Principal Balance Re-Performing $ 306,845 $ 359,230 $ 330,234 $ 357,678 Non-Performing 113,461 138,422 87,551 106,363 Other (1) 9,342 20,858 — — $ 429,648 $ 518,510 $ 417,785 $ 464,041 (1) Represents residual positions where the Company consolidates a securitization and the positions are recorded on the Company's books as residential mortgage loans. There may be limited data available regarding the underlying collateral of such securitizations. As described in Note 2, prior to the adoption of ASU 2016-13, the Company evaluated loans for OTTI on at least a quarterly basis. The determination of whether a loan was other-than-temporarily impaired involved judgments and assumptions based on subjective and objective factors. When the fair value of a loan was less than its amortized cost at the balance sheet date, the loan was considered impaired, and the impairment was designated as either "temporary" or "other-than-temporary." For the three and nine months ended September 30, 2019, the Company recognized $0.1 million of OTTI on certain loan pools, which is included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The company recorded $0.1 million of OTTI where the fair values of the loan pools were less than their carrying amounts. The $0.1 million related to loan pools with an unpaid principal balance of $4.9 million, a fair value of $4.3 million and an average fair market value of $4.6 million for the three and nine months ended September 30, 2019. The Company recognized $0.1 million of interest income on the loan pools where OTTI was taken during the three and nine months ended September 30, 2019. As of September 30, 2020 and December 31, 2019, the Company had residential mortgage loans with a fair value of $33.0 million and $35.6 million, respectively, that were in the process of foreclosure, excluding any loans classified as Other above. The Company’s mortgage loan portfolio consisted of mortgage loans on residential real estate located throughout the United States. The following is a summary of the geographic concentration of credit risk within the Company’s mortgage loan portfolio as of September 30, 2020 and December 31, 2019, excluding any loans classified as Other above: Geographic Concentration of Credit Risk September 30, 2020 December 31, 2019 Percentage of fair value of mortgage loans secured by properties in the following states representing 5% or more of fair value: California 17 % 19 % Florida 11 % 11 % New York 10 % 9 % New Jersey 6 % 6 % The Company records interest income on an effective interest basis. The accretable discount is determined by the excess of the Company’s estimate of undiscounted principal, interest, and other cash flows expected to be collected over its initial investment in the mortgage loan. The following is a summary of the changes in the accretable portion of discounts for the three and nine months ended September 30, 2020 and September 30, 2019, respectively (in thousands): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 Beginning Balance $ 138,161 $ 89,515 $ 168,877 $ 79,610 Additions 31,115 70,279 160,132 90,515 Accretion (5,073) (4,286) (21,538) (10,987) Reclassifications from/(to) non-accretable difference (1,064) (1,089) (25,741) 515 Disposals (2,298) (53) (120,889) (5,287) Ending Balance $ 160,841 $ 154,366 $ 160,841 $ 154,366 As of September 30, 2020, the Company’s residential mortgage loan portfolio was comprised of 3,394 conventional loans with individual original loan balances between $5.6 thousand and $3.4 million, excluding loans classified as Other above. As of December 31, 2019, the Company’s residential mortgage loan portfolio was comprised of 3,413 conventional loans with individual original loan balances between $3.8 thousand and $3.4 million. In August 2019 and September 2020, the Company entered into securitization transactions of certain of its residential mortgage loans. The Company concluded that the SPEs created to facilitate these transactions were VIEs and also determined that the August 2019 VIE and September 2020 VIE should be consolidated by the Company. The transferred assets were recorded as secured borrowings, based on the Company’s involvement in the August 2019 VIE and September 2020 VIE, including the design and purpose of the SPEs, and whether the Company’s involvement reflected controlling financial interests that resulted in the Company being deemed the primary beneficiaries of the August 2019 VIE and the September 2020 VIE. Upon consolidation, the Company elected the fair value option for the assets and liabilities of the August 2019 VIE and the September 2020 VIE. Electing the fair value option allows the Company to record changes in fair value in the Consolidated Statement of Operations, which, in management's view, more appropriately reflects the results of operations for a particular reporting period as all activities will be recorded in a similar manner. The Company applied the guidance under ASU 2014-13, "Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity," whereby the Company determines whether the fair value of the assets or liabilities of the August 2019 VIE and September 2020 VIE are more observable as a basis for measuring the less observable financial instruments. The Company has determined that the fair value of the liabilities of the August 2019 VIE and September 2020 VIE are more observable since the prices for these liabilities are more easily determined as similar instruments trade more frequently on a relative basis than the individual assets of the VIEs. The following table details certain information related to the assets and liabilities of the August 2019 VIE and September 2020 VIE as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Assets Residential mortgage loans, at fair value $ 420,200 $ 255,171 Restricted cash 1,976 — Other assets 2,596 898 Total assets $ 424,772 $ 256,069 Liabilities Financing arrangements $ 23,918 $ 24,584 Securitized debt, at fair value 358,986 217,118 Other liabilities 546 596 Total liabilities $ 383,450 $ 242,298 The following table details additional information regarding loans and securitized debt related to the August 2019 VIE and September 2020 VIE as of September 30, 2020 and December 31, 2019 ($ in thousands): Weighted Average As of: Current Unpaid Principal Balance Fair Value Coupon Yield Life (Years) (1) September 30, 2020 August 2019 VIE Residential mortgage loans $ 248,023 $ 220,590 3.71 % 4.80 % 6.97 Securitized debt (2) 206,434 195,499 2.96 % 2.97 % 5.13 September 2020 VIE Residential mortgage loans 249,071 199,610 3.58 % 5.46 % 6.72 Securitized debt (2) 163,487 163,487 2.98 % 3.00 % 2.09 December 31, 2019 August 2019 VIE Residential mortgage loans 263,956 255,171 3.96 % 5.11 % 7.66 Securitized debt (2) 217,455 217,118 2.92 % 2.86 % 5.00 (1) This is based on projected life. Typically, actual maturities of investments and loans are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) As of September 30, 2020 and December 31, 2019, the Company has recorded secured financing of $359.0 million and $217.1 million, respectively, on the consolidated balance sheets in the "Securitized debt, at fair value" line item. The Company recorded the proceeds from the issuance of the secured financing in the "Cash Flows from Financing Activities" section of the consolidated statement of cash flows at the time of securitization. The holders of the securitized debt have no recourse to the general credit of the Company. The Company has no obligation to provide any other explicit or implicit support to the August 2019 VIE and September 2020 VIE. Commercial loans The Company has chosen to make a fair value election pursuant to ASC 825 for its commercial loan portfolio. Unrealized gains and losses are recognized in current period earnings in the "Unrealized gain/(loss) on real estate securities and loans, net" line item. The gross unrealized gains/(losses) columns in the tables below represent inception to date unrealized gains/(losses). For the three months ended September 30, 2020, the Company sold 1 commercial loan, for total proceeds of $2.7 million, recording realized losses of $4.7 million. For the nine months ended September 30, 2020, the Company sold 2 commercial loans for total proceeds of $36.9 million, recording realized losses of $6.5 million. For the three and nine months ended September 30, 2019, the Company did not sell any commercial loans. The following tables present detail on the Company’s commercial loan portfolio as of September 30, 2020 and December 31, 2019 ($ in thousands). September 30, 2020 Weighted Average Loan Current Face Premium (Discount) Amortized Cost Gross Unrealized Losses Fair Value (3) Coupon Yield (5) Life Extended Location Collateral Type Loan G (8)(9) $ 56,697 $ — $ 56,697 $ (3,941) $ 52,756 5.27 % 5.27 % 1.80 July 9, 2022 CA Condo, Retail, Hotel Loan I (10)(11) 15,211 (173) 15,038 (826) 14,212 11.50 % 12.00 % 2.47 February 9, 2023 MN Office, Retail Loan K (12) 14,173 — 14,173 (1,100) 13,073 10.00 % 11.00 % 1.27 February 22, 2024 NY Hotel, Retail Loan L (12)(13) 51,000 (338) 50,662 (7,823) 42,839 5.40 % 5.67 % 3.86 July 22, 2024 IL Hotel, Retail $ 137,081 $ (511) $ 136,570 $ (13,690) $ 122,880 6.50 % 6.80 % 2.59 (1) The Company has the contractual right to receive a balloon payment for each loan. (2) Refer to Note 13 "Commitments and Contingencies" for details on the Company's commitments on its Commercial Loans as of September 30, 2020. (3) Pricing is reflective of marks on unfunded commitments. (4) Each commercial loan investment has a variable coupon rate. (5) Yield includes any exit fees. (6) Actual maturities of commercial mortgage loans may be shorter or longer than stated contractual maturities. Maturities are affected by prepayments of principal. (7) Represents the maturity date of the last possible extension option. (8) Loan G is a first mortgage loan. (9) Loan G has been amended and has been extended to its extended maturity date upon reaching its initial maturity of July 9, 2020. See Note 13 for more details regarding commitments. (10) Loan I is a mezzanine loan. (11) Subsequent to quarter end, the Company and the borrower of Loan I entered into a modification agreement to, among other things, extend the term of the Loan, allow for a portion of the interest to be deferred and increase the capital commitment amount by $6.0 million. See Note 13 for more details regarding commitments. (12) Loan K and Loan L are comprised of first mortgage and mezzanine loans. (13) Subsequent to quarter end, the Company and the borrower of Loan L entered into a modification agreement to, among other things, require the borrower to pay previously deferred interest in full, defer interest for the following 12-month period and require funding of capital reserves by the borrower. December 31, 2019 Weighted Average Loan (1) Current Face Premium Amortized Cost Gross Fair Value Coupon Yield (3) Life Extended Location Collateral Type Loan G (6) $ 45,856 $ — $ 45,856 $ — $ 45,856 6.46 % 6.46 % 0.53 July 9, 2022 CA Condo, Retail, Hotel Loan H (6) 36,000 — 36,000 — 36,000 5.49 % 5.49 % 0.19 June 9, 2020 AZ Office Loan I (7) 11,992 (184) 11,808 184 11,992 12.21 % 14.51 % 1.04 February 9, 2023 MN Office, Retail Loan J (6) 4,674 — 4,674 — 4,674 6.36 % 6.36 % 2.12 January 1, 2024 NY Hotel, Retail Loan K (8) 9,164 — 9,164 — 9,164 10.71 % 11.86 % 1.72 February 22, 2024 NY Hotel, Retail Loan L (8) 51,000 (502) 50,498 502 51,000 6.16 % 6.50 % 4.63 July 22, 2024 IL Hotel, Retail $ 158,686 $ (686) $ 158,000 $ 686 $ 158,686 6.82 % 7.17 % 1.92 (1) The Company has the contractual right to receive a balloon payment for each loan. (2) Each commercial loan investment has a variable coupon rate. (3) Yield includes any exit fees. (4) Actual maturities of commercial mortgage loans may be shorter or longer than stated contractual maturities. Maturities are affected by prepayments of principal. (5) Represents the maturity date of the last possible extension option. (6) Loan G, Loan H, and Loan J are first mortgage loans. (7) Loan I is a mezzanine loan. (8) Loan K and Loan L are comprised of first mortgage and mezzanine loans.

Excess MSRs

Excess MSRs	9 Months Ended
	Sep. 30, 2020
Disclosure of Excess MSRs [Abstract]
Excess MSRs	Excess MSRs On August 31, 2020, the Company, alongside private funds under the management of Angelo Gordon, sold its Ginnie Mae Excess MSR portfolio to Arc Home for total proceeds of $18.9 million. The portfolio had a total unpaid principal balance of $3.1 billion. The Company's share of the total proceeds approximated $8.5 million, representing its approximate 45% ownership interest. The Company recorded realized gains of $0.1 million and realized losses of $4.8 million. Arc Home subsequently sold its Ginnie Mae MSR portfolio to a third party. The Company has chosen to make a fair value election pursuant to ASC 825 for its Excess MSR portfolio. Unrealized gains and losses are recognized in current period earnings in the "Unrealized gain/(loss) on derivative and other instruments, net" line item. The gross unrealized gains/(losses) columns below represent inception to date unrealized gains/(losses). The following table presents detail on the Company’s Excess MSR portfolio on September 30, 2020 ($ in thousands). Gross Unrealized Weighted Average Unpaid Principal Amortized Losses Fair Value Yield Life Agency Excess MSRs $ 652,756 $ 4,725 $ (1,284) $ 3,441 3.97 % 5.61 Credit Excess MSRs 29,185 172 (87) 85 23.56 % 7.27 Total Excess MSRs $ 681,941 $ 4,897 $ (1,371) $ 3,526 4.44 % 5.68 (1) This is based on projected life. Actual maturities of Excess MSRs may be shorter than stated contractual maturities. Maturities are affected by prepayments of principal. The following table presents detail on the Company’s Excess MSR portfolio on December 31, 2019 ($ in thousands). Gross Unrealized Weighted Average Unpaid Principal Amortized Gains Losses Fair Value Yield Life Agency Excess MSRs $ 2,910,735 $ 19,570 $ 93 $ (2,031) $ 17,632 8.32 % 5.58 Credit Excess MSRs 34,753 178 2 (37) 143 21.38 % 5.25 Total Excess MSRs $ 2,945,488 $ 19,748 $ 95 $ (2,068) $ 17,775 8.42 % 5.58 (1) This is based on projected life. Actual maturities of Excess MSRs may be shorter than stated contractual maturities. Maturities are affected by prepayments of principal. As described in Note 2, prior to the adoption of ASU 2016-13, the Company evaluated Excess MSRs for OTTI on at least a quarterly basis. For the three months ended September 30, 2019, the Company recognized an OTTI charge of $0.4 million on its Excess MSRs, which is included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. None of the $ 0.4 million of OTTI recorded for the three months ended September 30, 2019 was related to Excess MSRs where OTTI was not recognized in a prior year. For the nine months ended September 30, 2019, the Company recognized an OTTI charge of $2.6 million on its Excess MSRs, which is included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. Of the $2.6 million of OTTI recorded for the nine months ended September 30, 2019, $0.8 million was related to Excess MSRs where OTTI was not recognized in a prior year.

Fair value measurements

Fair value measurements	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements As described in Note 2, the fair value of financial instruments that are recorded at fair value is determined by the Manager, subject to oversight of the Company’s Board of Directors, and in accordance with ASC 820, "Fair Value Measurements and Disclosures." When possible, the Company determines fair value using independent data sources. ASC 820 establishes a hierarchy that prioritizes the inputs to valuation techniques giving the highest priority to readily available unadjusted quoted prices in active markets for identical assets (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements) when market prices are not readily available or reliable. Values for the Company’s securities, Excess MSRs, securitized debt of the December 2014 VIE, derivatives and U.S. Treasury securities are based upon prices obtained from third party pricing services, which are indicative of market activity. The evaluation methodology of the Company’s third-party pricing services incorporates commonly used market pricing methods, including a spread measurement to various indices such as the one-year constant maturity treasury and LIBOR, which are observable inputs. The evaluation also considers the underlying characteristics of each investment, which are also observable inputs, including: coupon; maturity date; loan age; reset date; collateral type; periodic and life cap; geography; and prepayment speeds. The Company collects and considers current market intelligence on all major markets, including benchmark security evaluations and bid-lists from various sources, when available. As part of the Company’s risk management process, the Company reviews and analyzes all prices obtained by comparing prices to recently completed transactions involving the same or similar investments on or near the reporting date. If, in the opinion of the Manager, one or more prices reported to the Company are not reliable or unavailable, the Manager reviews the fair value based on characteristics of the investment it receives from the issuer and available market information. In valuing its derivatives, the Company considers the creditworthiness of both the Company and its counterparties, along with collateral provisions contained in each derivative agreement, from the perspective of both the Company and its counterparties. All of the Company’s derivatives are either subject to bilateral collateral arrangements or clearing in accordance with the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the "Dodd Frank Act"). For swaps cleared under the Dodd Frank Act, a Central Counterparty Clearing House ("CCCH") now stands between the Company and the over-the-counter derivative counterparties. In order to access clearing, the Company has entered into clearing agreements with Futures Commissions Merchants ("FCMs"). The daily exchange of variation margin associated with a CCCH centrally cleared derivative instrument is legally characterized as the daily settlement of the derivative instrument itself. Accordingly, the Company accounts for the daily receipt or payment of variation margin associated with its centrally cleared interest rate swaps and futures as a direct reduction to the carrying value of the interest rate swap and future derivative asset or liability, respectively. The carrying amount of centrally cleared interest rate swaps and futures reflected in the Company’s consolidated balance sheets is equal to the unsettled fair value of such instruments. See Note 8 for more information. In determining the fair value of the Company's mortgage loans and securitized debt relating to the August 2019 VIE and the September 2020 VIE, the Company considers data such as loan origination information, additional updated borrower information, loan servicing data, as available, forward interest rates, general economic conditions, home price index forecasts and valuations of the underlying properties. The variables considered most significant to the determination of the fair value of the Company's mortgage loans include market-implied discount rates, projections of default rates, delinquency rates, prepayment rates and loss severity (considering mortgage insurance). Projections of default and prepayment rates are impacted by other variables such as reperformance rates and timeline to liquidation. The Company uses loan level data and macro-economic inputs to generate loss adjusted cash flows and other information in determining the fair value of its mortgage loans. Because of the inherent uncertainty of such valuation, the fair values established for mortgage loans held by the Company may differ from the fair values that would have been established if a ready market existed for these mortgage loans. The Manager may also engage specialized third party valuation service providers to assess and corroborate the valuation of a selection of investments in the Company’s loan portfolio and the Company's investment in Arc Home on a periodic basis. These specialized third party valuation service providers conduct independent valuation analyses based on a review of source documents, available market data, and comparable investments. The analyses provided by valuation service providers are reviewed and considered by the Manager. TBA instruments are similar in form to the Company’s Agency RMBS portfolio, and the Company therefore estimates fair value based on similar methods. Cash equivalents include investments in money market funds that invest primarily in short-term U.S. Treasury and Agency securities. These cash equivalent instruments are valued at their market quoted prices, which generally approximate cost plus accrued interest. Refer to Note 2 for more information on changes regarding the Company's leveling policy. The following table presents the Company’s financial instruments measured at fair value on a recurring basis as of September 30, 2020 (in thousands): Fair Value at September 30, 2020 Level 1 Level 2 Level 3 Total Assets: Agency RMBS: 30 Year Fixed Rate $ — $ 250,123 $ — $ 250,123 Credit Investments: Non-Agency RMBS (1) — 39,269 3,690 42,959 Non-Agency RMBS Interest Only — 312 — 312 CMBS (2) — 49,877 — 49,877 CMBS Interest Only — 4,351 — 4,351 Residential mortgage loans — 2,275 427,373 429,648 Commercial loans — — 122,880 122,880 Excess mortgage servicing rights — — 3,526 3,526 AG Arc (3) — — 41,436 41,436 Total Assets Measured at Fair Value $ — $ 346,207 $ 598,905 $ 945,112 Liabilities: Securitized debt $ — $ — $ (358,986) $ (358,986) Derivative liabilities — (39) — (39) Total Liabilities Measured at Fair Value $ — $ (39) $ (358,986) $ (359,025) (1) Non-Agency RMBS is comprised of Prime, Alt-A/Subprime, Non-US RMBS, Re/Non-Performing Securities and Land Related Financing. (2) CMBS is comprised of Conduit, Single-Asset/Single-Borrower and Freddie Mac K-Series CMBS. (3) Refer to Note 2 for more information on the Company's accounting policies with regard to cash equivalents, if applicable, and AG Arc. The table above includes the Company's investment in AG Arc, which is included in its Investments in Debt and Equity of Affiliates line item on the consolidated balance sheets, as the Company has chosen to elect the fair value option with respect to its investment pursuant to ASC 825. The following table presents the Company’s financial instruments measured at fair value on a recurring basis as of December 31, 2019 (in thousands): Fair value at December 31, 2019 Level 1 Level 2 Level 3 Total Assets: Agency RMBS: 30 Year Fixed Rate $ — $ 2,241,298 $ — $ 2,241,298 Interest Only — 74,141 — 74,141 Credit Investments: Non-Agency RMBS (1) — 86,281 630,115 716,396 Non-Agency RMBS Interest Only — — 1,074 1,074 CMBS (2) — 2,365 366,566 368,931 CMBS Interest Only — — 47,992 47,992 Residential mortgage loans — — 417,785 417,785 Commercial loans — — 158,686 158,686 Excess mortgage servicing rights — — 17,775 17,775 Cash equivalents (3) 53,243 — — 53,243 Derivative assets — 2,282 — 2,282 AG Arc (3) — — 28,546 28,546 Total Assets Measured at Fair Value $ 53,243 $ 2,406,367 $ 1,668,539 $ 4,128,149 Liabilities: Securitized debt $ — $ (151,933) $ (72,415) $ (224,348) Derivative liabilities (122) (289) — (411) Total Liabilities Measured at Fair Value $ (122) $ (152,222) $ (72,415) $ (224,759) (1) Non-Agency RMBS is comprised of Prime, Alt-A/Subprime, Non-US RMBS, Re/Non-Performing Securities and Land Related Financing. (2) CMBS is comprised of Conduit, Single-Asset/Single-Borrower and Freddie Mac K-Series CMBS. (3) Refer to Note 2 for more information on the Company's accounting policies with regard to cash equivalents, if applicable, and AG Arc. The table above includes the Company's investment in AG Arc, which is included in its Investments in Debt and Equity of Affiliates line item on the consolidated balance sheets, as the Company has chosen to elect the fair value option with respect to its investment pursuant to ASC 825. The Company did not have any transfers of assets or liabilities between Levels 1 and 2 of the fair value hierarchy during the three and nine months ended September 30, 2020 and September 30, 2019. Refer to the tables below for details on transfers between the Level 3 and Level 2 categories under ASC 820. Transfers into the Level 3 category of the fair value hierarchy occur due to instruments exhibiting indications of reduced levels of market transparency. Transfers out of the Level 3 category of the fair value hierarchy occur due to instruments exhibiting indications of increased levels of market transparency and updates to the Company's leveling policy, which are detailed in Note 2. Indications of increases or decreases in levels of market transparency include a change in observable transactions or executable quotes involving these instruments or similar instruments. Changes in these indications could impact price transparency, and thereby cause a change in level designations in future periods. The following tables present additional information about the Company’s assets and liabilities which are measured at fair value on a recurring basis for which the Company has utilized Level 3 inputs to determine fair value: Three Months Ended September 30, 2020 (in thousands) Non-Agency RMBS Residential Commercial Loans Excess Mortgage AG Arc Securitized debt Beginning balance $ 4,496 $ 379,822 $ 127,685 $ 12,294 $ 28,030 $ (198,974) Transfers (1): Transfers out of level 3 — (2,225) — — — — Purchases/Transfers — 60,100 8,308 — — — Issuances of Securitized Debt — — — — — (163,487) Proceeds from sales of assets — (6,151) (2,724) (8,460) — — Proceeds from settlement (954) (11,436) (5,710) — — 6,798 Total net gains/(losses) (2) Included in net income 148 7,263 (4,679) (308) 13,406 (3,323) Ending Balance $ 3,690 $ 427,373 $ 122,880 $ 3,526 $ 41,436 $ (358,986) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2020 (3) $ 221 $ 9,778 $ — $ 3,298 $ 13,406 $ (3,323) (1) Transfers are assumed to occur at the beginning of the period. During the three months ended September 30, 2020, the Company transferred 2 Residential Mortgage Loan positions into the Level 2 category from the Level 3 category under the fair value hierarchy of ASC 820. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 13,206 Unrealized gain/(loss) on derivative and other instruments, net (3,631) Net realized gain/(loss) (8,377) Equity in earnings/(loss) from affiliates 13,406 Total $ 14,604 (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 9,999 Unrealized gain/(loss) on derivative and other instruments, net (25) Equity in earnings/(loss) from affiliates 13,406 Total $ 23,380 Three Months Ended September 30, 2019 (in thousands) Non-Agency RMBS Non-Agency RMBS Interest Only ABS CMBS CMBS Interest Only Residential Mortgage Loans Commercial Loans Excess Mortgage Servicing Rights AG Arc Securitized debt Beginning balance $ 561,145 $ 1,834 $ 20,571 $ 220,225 $ 46,836 $ 199,970 $ 118,005 $ 20,893 $ 18,717 $ (8,630) Transfers (1): Transfers into level 3 55,311 — — — — — — — — — Purchases/Transfers 72,933 — 473 39,095 — 181,053 60,803 — — — Issuances of Securitized Debt — — — — — — — — — (65,171) Capital Contributions — — — — — — — — 11,148 — Proceeds from sales/redemptions (23,630) — — — (917) — — — — — Proceeds from settlement (13,578) — (8,263) (5,777) — (6,364) (32,800) — — 630 Total net gains/(losses) (2) Included in net income 1,876 (412) (489) 4,419 (976) 4,718 510 (2,738) (2,594) (15) Ending Balance $ 654,057 $ 1,422 $ 12,292 $ 257,962 $ 44,943 $ 379,377 $ 146,518 $ 18,155 $ 27,271 $ (73,186) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2019 (3) $ 106 $ 371 $ (489) $ 4,356 $ (925) $ 4,651 $ 510 $ (2,328) $ (2,594) $ (15) (1) Transfers are assumed to occur at the beginning of the period. During the three months ended September 30, 2019, the Company transferred 9 Non-Agency RMBS securities into the Level 3 category from the Level 2 category under the fair value hierarchy of ASC 820. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 8,758 Unrealized gain/(loss) on derivative and other instruments, net (2,753) Net realized gain/(loss) 888 Equity in earnings/(loss) from affiliates (2,594) Total $ 4,299 (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 8,580 Unrealized gain/(loss) on derivative and other instruments, net (2,343) Equity in earnings/(loss) from affiliates (2,594) Total $ 3,643 Nine Months Ended September 30, 2020 (in thousands) Non-Agency Non-Agency CMBS CMBS Interest Residential Commercial Excess AG Arc Securitized Beginning balance $ 630,115 $ 1,074 $ 366,566 $ 47,992 $ 417,785 $ 158,686 $ 17,775 $ 28,546 $ (72,415) Transfers (1): Transfers into level 3 — — — — — — — — (151,933) Transfers out of level 3 (210,709) (1,074) (170,816) (22,055) — — — — 7,230 Purchases/Transfers 1,559 — 3,540 — 536,710 27,508 — — — Issuances of Securitized Debt — — — — — — — — (166,487) Proceeds from sales of assets and seizures of assets (362,199) — (148,111) (21,995) (393,559) (36,924) (8,460) — — Proceeds from settlement (11,823) — (9,367) — (50,563) (5,710) — — 16,021 Total net gains/(losses) (2) Included in net income (43,253) — (41,812) (3,942) (83,000) (20,680) (5,789) 12,890 8,598 Ending Balance $ 3,690 $ — $ — $ — $ 427,373 $ 122,880 $ 3,526 $ 41,436 $ (358,986) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2020 (3) $ (329) $ — $ — $ — $ (25,443) $ (14,210) $ (2,183) $ 12,890 $ 8,598 (1) Transfers are assumed to occur at the beginning of the period. During the nine months ended September 30, 2020, the Company transferred 50 Non-Agency RMBS securities, 2 Non-Agency RMBS Interest Only securities, 32 CMBS securities, 15 CMBS Interest Only securities and 1 securitized debt security into the Level 2 category from the Level 3 category under the fair value hierarchy of ASC 820. During the nine months ended September 30, 2020, the Company transferred 1 securitized debt security into the Level 3 category from the Level 2 category under the fair value hierarchy of ASC 820. Refer to Note 2 for more information on changes regarding the Company's leveling policy. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ (74,309) Unrealized gain/(loss) on derivative and other instruments, net 2,809 Net realized gain/(loss) (118,378) Equity in earnings/(loss) from affiliates 12,890 Total $ (176,988) (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ (39,982) Unrealized gain/(loss) on derivative and other instruments, net 6,415 Equity in earnings/(loss) from affiliates 12,890 Total $ (20,677) Nine Months Ended September 30, 2019 (in thousands) Non-Agency RMBS Non-Agency RMBS Interest Only ABS CMBS CMBS Interest Only Residential Mortgage Loans Commercial Loans Excess Mortgage Servicing Rights AG Arc Securitized debt Beginning balance $ 491,554 $ 3,099 $ 21,160 $ 211,054 $ 50,331 $ 186,096 $ 98,574 $ 26,650 $ 20,360 $ (10,858) Transfers (1): Transfers into level 3 88,511 — — — — — — — — — Transfers out of level 3 (39,557) — — (5,279) — — — — — — Purchases/Transfers 213,495 — 1,632 82,540 — 207,048 90,451 — — — Issuances of Securitized Debt — — — — — — — — — (65,171) Capital Contributions — — — — — — — — 17,837 — Proceeds from sales/redemptions (72,872) — (1,284) (20,165) (2,631) (12,780) — — — — Proceeds from settlement (41,451) — (9,446) (28,711) — (14,553) (43,217) — — 2,845 Total net gains/(losses) (2) Included in net income 14,377 (1,677) 230 18,523 (2,757) 13,566 710 (8,495) (10,926) (2) Ending Balance $ 654,057 $ 1,422 $ 12,292 $ 257,962 $ 44,943 $ 379,377 $ 146,518 $ 18,155 $ 27,271 $ (73,186) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2019 (3) $ 10,193 $ (613) $ 165 $ 15,089 $ (2,631) $ 12,643 $ 710 $ (5,867) $ (10,926) $ (2) (1) Transfers are assumed to occur at the beginning of the period. During the nine months ended September 30, 2019, the Company transferred 14 Non-Agency RMBS securities into the Level 3 category from the Level 2 category and 4 Non-Agency RMBS and 2 CMBS securities into the Level 2 category from the Level 3 category under the fair value hierarchy of ASC 820. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 38,503 Unrealized gain/(loss) on derivative and other instruments, net (8,497) Net realized gain/(loss) 4,469 Equity in earnings/(loss) from affiliates (10,926) Total $ 23,549 (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 35,556 Unrealized gain/(loss) on derivative and other instruments, net (5,869) Equity in earnings/(loss) from affiliates (10,926) Total $ 18,761 The following tables present a summary of quantitative information about the significant unobservable inputs used in the fair value measurement of investments for which the Company has utilized Level 3 inputs to determine fair value. Asset Class Fair Value at September 30, 2020 (in thousands) Valuation Technique Unobservable Input Range Yield 8.28% - 8.28% (8.28%) Non-Agency RMBS $ 2,315 Discounted Cash Flow Projected Collateral Prepayments 5.58% - 5.58% (5.58%) Projected Collateral Losses 5.79% - 5.79% (5.79%) Projected Collateral Severities -5.73% - -5.73% (-5.73%) $ 1,375 Consensus Pricing Offered Quotes 89.00 - 89.00 (89.00) Yield 5.50% - 10.00% (6.63%) Residential Mortgage Loans $ 420,304 Discounted Cash Flow Projected Collateral Prepayments 3.52% - 10.11% (7.74%) Projected Collateral Losses 1.84% - 9.33% (2.75%) Projected Collateral Severities -8.56% - 46.07% (21.68%) $ 7,069 Consensus Pricing Offered Quotes 67.30 - 105.84 (98.59) Yield 11.22% - 18.30% (12.82%) Commercial Loans $ 122,880 Discounted Cash Flow Credit Spread 1,026 bps - 1,647 bps (1,170 bps) Recovery Percentage (2) 100.00% - 100.00% (100.00%) Excess Mortgage Servicing Rights Discounted Cash Flow Yield 9.00% - 9.70% (9.08%) $ 3,440 Projected Collateral Prepayments 12.65% - 16.20% (14.21%) $ 86 Consensus Pricing Offered Quotes 0.29 - 0.29 (0.29) AG Arc $ 41,436 Comparable Multiple Book Value Multiple 1.0x - 1.0x (1.0x) Liability Class Fair Value at September 30, 2020 (in thousands) Valuation Technique Unobservable Input Range Yield 3.02% - 6.50% (3.57%) Securitized debt $ (358,986) Discounted Cash Flow Projected Collateral Prepayments 6.13% - 8.68% (7.52%) Projected Collateral Losses 2.17% - 3.18% (2.63%) Projected Collateral Severities 16.88% - 21.48% (19.39%) (1) Amounts are weighted based on fair values. (2) Represents the proportion of the principal expected to be collected relative to the loan balances as of September 30, 2020. Asset Class Fair Value at December 31, 2019 (in thousands) Valuation Technique Unobservable Input Range Yield 1.71% - 100.00% (5.99%) Non-Agency RMBS $ 625,537 Discounted Cash Flow Projected Collateral Prepayments 0.00% - 100.00% (14.60%) Projected Collateral Losses 0.00% - 100.00% (2.93%) Projected Collateral Severities 0.00% - 100.00% (21.37%) $ 4,578 Consensus Pricing Offered Quotes 100.00 - 100.00 (100.00) Yield 27.50% - 27.50% (27.50%) Non-Agency RMBS Interest Only $ 1,074 Discounted Cash Flow Projected Collateral Prepayments 18.00% - 18.00% (18.00%) Projected Collateral Losses 2.00% - 2.00% (2.00%) Projected Collateral Severities 35.00% - 35.00% (35.00%) Yield 0.00% - 13.89% (6.33%) CMBS $ 366,566 Discounted Cash Flow Projected Collateral Prepayments 0.00% - 0.00% (0.00%) Projected Collateral Losses 0.00% - 0.00% (0.00%) Projected Collateral Severities 0.00% - 0.00% (0.00%) Yield -2.57% - 9.86% (4.19%) CMBS Interest Only $ 47,992 Discounted Cash Flow Projected Collateral Prepayments 99.00% - 100.00% (99.93%) Projected Collateral Losses 0.00% - 0.00% (0.00%) Projected Collateral Severities 0.00% - 0.00% (0.00%) Yield 4.00% - 8.25% (4.81%) Residential Mortgage Loans $ 364,107 Discounted Cash Flow Projected Collateral Prepayments 4.81% - 9.04% (7.78%) Projected Collateral Losses 1.64% - 4.94% (2.36%) Projected Collateral Severities -7.32% - 36.91% (23.15%) $ 53,678 Recent Transaction Cost N/A Yield 6.16% - 10.76% (6.86%) Commercial Loans $ 60,164 Discounted Cash Flow Credit Spread 440 bps - 900 bps (510 bps) Recovery Percentage (2) 100.00% - 100.00% (100.00%) $ 98,522 Consensus Pricing Offered Quotes 100.00 - 100.00 (100.00) Excess Mortgage Servicing Rights Yield 8.50% - 11.60% (9.20%) $ 17,633 Discounted Cash Flow Projected Collateral Prepayments 9.35% - 16.90% (12.36%) $ 142 Consensus Pricing Offered Quotes 0.01 - 0.40 (0.40) AG Arc $ 28,546 Comparable Multiple Book Value Multiple 1.0x - 1.0x (1.0x) Liability Class Fair Value at December 31, 2019 (in thousands) Valuation Technique Unobservable Input Range Yield 2.98% - 4.70% (3.54%) Securitized debt $ (72,415) Discounted Cash Flow Projected Collateral Prepayments 10.00% - 10.04% (10.04%) Projected Collateral Losses 2.04% - 3.50% (2.19%) Projected Collateral Severities 20.13% - 45.00% (22.61%) (1) Amounts are weighted based on fair values. (2) Represents the proportion of the principal expected to be collected relative to the loan balances as of December 31, 2019. As further described above, fair values for the Company’s securities portfolio are based upon prices obtained from third-party pricing services. Broker quotations may also be used. The significant unobservable inputs used in the fair value measurement of the Company’s securities are yields, prepayment rates, probability of default, and loss severity in the event of default. Significant increases (decreases) in any of those inputs in isolation would result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates. Also, as described above, valuation of the Company’s loan portfolio is determined by the Manager using third-party pricing services where available, specialized third party valuation service providers, or model-based pricing. The evaluation considers the underlying characteristics of each loan, which are observable inputs, including: coupon, maturity date, loan age, reset date, collateral type, periodic and life cap, geography, and prepayment speeds. The valuations of commercial loans also require significant judgments, which include assumptions regarding capitalization rates, re-performance rates, leasing, creditworthiness

Financing arrangements

Financing arrangements	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Financing arrangements	Financing arrangements The following table presents a summary of the Company's financing arrangements as of September 30, 2020 and December 31, 2019 (in thousands). September 30, 2020 December 31, 2019 Repurchase agreements $ 164,304 $ 3,121,966 Revolving facilities (1) 61,200 111,502 Financing arrangements $ 225,504 $ 3,233,468 (1) Increasing the Company's borrowing capacity under the Company's revolving facilities requires consent of the lenders. In March 2020, the Company began engaging in discussions with its financing counterparties with regard to entering into forbearance agreements pursuant to which each participating counterparty would agree to forbear from exercising its rights and remedies with respect to an event of default under the applicable financing arrangement for an agreed-upon period. Pursuant to the terms of the Forbearance Agreement, the Participating Counterparties agreed to forbear from exercising any of their rights and remedies in respect of events of default and any and all other defaults under the applicable financing arrangement with the Company for the duration of the Forbearance Period. As of March 31, 2020, the Company had received notifications from several of its financing counterparties of alleged events of default under their repurchase agreements, and of those counterparties' intentions to accelerate the Company's performance obligations under the relevant agreements due to the Company's inability to meet certain margin calls as a result of market disruptions created by the COVID-19 pandemic. As discussed above, until a formal agreement was reached, the Company negotiated with its financing counterparties regarding the lenders' forbearance from exercising their rights and remedies under their applicable repurchase agreements. While as of March 31, 2020 certain lenders had accelerated the Company's obligations under their applicable repurchase agreements, upon execution of the Reinstatement Agreement, the terms of the Bilateral Agreements were reinstated, including the maturity dates of the repurchase agreements. As described above, on June 10, 2020, the Company and the Participating Counterparties entered into a Reinstatement Agreement, pursuant to which the parties agreed to terminate the Forbearance Agreement and each Participating Counterparty agreed to permanently waive all existing and prior events of default under its financing agreements with the Company and to reinstate each Bilateral Agreement, as it may be amended by agreement between the Participating Counterparty and the Company. As of September 30, 2020, the Company had met all margin calls related to its repurchase agreements. Refer to Note 13 for more information on deficiencies, all of which have been settled. For additional information related to the Forbearance Agreement and the Reinstatement Agreement, see Note 2 under "Financing Arrangements." Repurchase agreements A vast majority of the Company's financing arrangements have historically been effectuated through repurchase agreements. The Company pledges certain real estate securities and loans as collateral under repurchase agreements with financial institutions, the terms and conditions of which are negotiated on a transaction-by-transaction basis. Repurchase agreements involve the sale and a simultaneous agreement to repurchase the transferred assets or similar assets at a future date. The amount borrowed generally is equal to the fair value of the assets pledged less an agreed-upon discount, referred to as a "haircut." The Company calculates haircuts disclosed in the tables below by dividing the equity on each borrowing by the current fair value of each investment. Repurchase agreements are accounted for as financings and require the repurchase of the transferred assets at the end of each agreement’s term, typically 30 to 90 days. The carrying amount of the Company’s repurchase agreements approximates fair value due to their short-term maturities or floating rate coupons. If the Company maintains the beneficial interest in the specific assets pledged during the term of the borrowing, it receives the related principal and interest payments. If the Company does not maintain the beneficial interest in the specific assets pledged during the term of the borrowing, it will have the related principal and interest payments remitted to it by the lender. Interest rates on these borrowings are fixed based on prevailing rates corresponding to the terms of the borrowings, and interest is paid at the termination of the borrowing at which time the Company may enter into a new borrowing arrangement at prevailing market rates with the same counterparty or repay that counterparty and negotiate financing with a different counterparty. If the fair value of pledged assets declines due to changes in market conditions or the publishing of monthly security paydown factors, lenders typically would require the Company to post additional securities as collateral, pay down borrowings or establish cash margin accounts with the counterparties in order to re-establish the agreed-upon collateral requirements, referred to as margin calls. The fair value of financial instruments pledged as collateral on the Company’s repurchase agreements disclosed in the tables below represent the Company’s fair value of such instruments which may differ from the fair value assigned to the collateral by its counterparties. The Company maintains a level of liquidity in order to meet these obligations. Under the terms of the Company’s master repurchase agreements, the counterparties may, in certain cases, sell or re-hypothecate the pledged collateral. If the fair value of pledged assets increases due to changes in market conditions, counterparties may be required to return collateral to us in the form of securities or cash or post additional collateral to us. The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding real estate securities pledged as collateral as of September 30, 2020 ($ in thousands): Repurchase Agreements Real Estate Securities Pledged Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 30 days or less $ 140,386 0.94 % 15.4 % $ 174,449 $ 182,292 $ 483 The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding real estate securities pledged as collateral as of December 31, 2019 ($ in thousands): Repurchase Agreements Real Estate Securities Pledged Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 30 days or less $ 1,550,508 2.33 % 9.0 % $ 1,728,837 $ 1,660,649 $ 5,402 31-60 days 1,362,121 2.13 % 7.0 % 1,501,850 1,453,257 5,191 61-90 days 71,753 2.99 % 23.5 % 93,957 92,901 245 Greater than 180 days 2,973 3.79 % 23.7 % 4,039 3,690 3 Total / Weighted Average $ 2,987,355 2.25 % 8.5 % $ 3,328,683 $ 3,210,497 $ 10,841 The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding residential mortgage loans pledged as collateral as of September 30, 2020 ($ in thousands): Repurchase Agreements Residential Mortgage Loans Pledged (1) Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Funding Cost Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 61-90 days $ 23,918 4.10 % 4.10 % 42.7 % $ 45,019 $ 44,017 $ 704 (1) These amounts represent certain of the Company's retained interests in securitizations. Refer to Note 4 for more information on the August 2019 VIE and September 2020 VIE. The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding residential mortgage loans pledged as collateral as of December 31, 2019 ($ in thousands): Repurchase Agreements Residential Mortgage Loans Pledged (1) Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Funding Cost Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 31-60 days $ 24,584 3.14 % 3.14 % 33.7 % $ 37,546 $ 25,192 $ 377 Greater than 180 days 107,010 3.61 % 3.80 % 19.3 % 133,678 135,409 443 Total / Weighted Average $ 131,594 3.53 % 3.68 % 22.0 % $ 171,224 $ 160,601 $ 820 (1) Balances contain certain of the Company's retained interests in securitizations. Refer to Note 4 for more information on the Company's August 2019 VIE. The Company did not have any repurchase agreements with any corresponding commercial loans pledged as collateral as of September 30, 2020. The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding commercial loans pledged as collateral as of December 31, 2019 ($ in thousands): Repurchase Agreements Commercial Loans Pledged Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Funding Cost Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest Greater than 180 days $ 3,017 4.46 % 5.89 % 35.4 % $ 4,674 $ 4,674 $ 26 Although repurchase agreements are committed borrowings until maturity, the lender retains the right to mark the underlying collateral to fair value. A reduction in the value of pledged assets resulting from changes in market conditions or factor changes would require the Company to provide additional collateral or cash to fund margin calls. See Note 8 for details on collateral posted/received against certain derivatives. As of September 30, 2020, the Company pledged cash of $0.4 million as collateral for clearing trades. The following table presents information with respect to the Company’s posting of collateral under repurchase agreements on September 30, 2020 and December 31, 2019, broken out by investment type (in thousands): September 30, 2020 December 31, 2019 Fair Value of investments pledged as collateral under repurchase agreements Agency RMBS $ 107,252 $ 2,231,933 Non-Agency RMBS 26,711 682,828 CMBS 40,486 413,922 Residential Mortgage Loans 45,019 171,224 Commercial Loans — 4,674 Cash pledged (i.e., restricted cash) under repurchase agreements 38 11,565 Total collateral pledged under repurchase agreements $ 219,506 $ 3,516,146 As of September 30, 2020, the Company had no investments posted to it under repurchase agreements. As of December 31, 2019, the Company had fair value of $1.1 million of U.S. Treasury Securities posted to it under repurchase agreements. The following table presents information with respect to the Company’s total borrowings under repurchase agreements on September 30, 2020 and December 31, 2019, broken out by investment type (in thousands): September 30, 2020 December 31, 2019 Repurchase agreements secured by investments: Agency RMBS $ 101,284 $ 2,109,278 Non-Agency RMBS 15,597 565,450 CMBS 23,505 312,627 Residential Mortgage Loans 23,918 131,594 Commercial Loans — 3,017 Gross Liability for repurchase agreements $ 164,304 $ 3,121,966 Repurchase agreements eligible for offset are presented gross on the consolidated balance sheets as of September 30, 2020 and December 31, 2019. The Company has not offset or netted its repurchase agreements with any cash collateral posted for either period. Revolving facilities The following table presents information regarding the Company's revolving facilities, excluding facilities within investments in debt and equity of affiliates, as of September 30, 2020 and December 31, 2019 ($ in thousands). September 30, 2020 December 31, 2019 Facility (1)(2)(3) Investment Maturity Date Rate Funding Cost Balance Net Carrying Value of Assets Pledged as Collateral Maximum Aggregate Borrowing Capacity Rate Funding Cost Balance Net Carrying Value of Assets Pledged as Collateral Revolving facility B (4) Residential mortgage loans June 28, 2021 — % — % $ — $ — $ — 3.80 % 3.80 % $ 21,546 $ 27,476 Revolving facility C Commercial loans August 10, 2023 2.31 % 2.79 % 61,200 95,595 100,000 3.85 % 4.01 % 89,956 132,856 Total revolving facilities $ 61,200 $ 95,595 $ 100,000 $ 111,502 $ 160,332 (1) All revolving facilities listed above are interest only until maturity. (2) Under the terms of the Company’s financing agreements, the Company's financial counterparties may, in certain cases, sell or re-hypothecate the pledged collateral. (3) Increasing the Company's borrowing capacity under this facility requires consent of the lender. (4) During the second quarter of 2020, Revolving facility B was paid off. Financing arrangements The Company has reduced its exposure to various counterparties, bringing the total number of counterparties with debt outstanding down from 30 as of December 31, 2019 to 6 as of September 30, 2020. The following tables present information at September 30, 2020 and December 31, 2019 with respect to each counterparty that provides the Company with financing for which the Company had greater than 5% of its stockholders’ equity at risk, excluding stockholders’ equity at risk under financing through affiliated entities ($ in thousands). September 30, 2020 Counterparty Stockholders’ Equity Weighted Average Percentage of Credit Suisse AG, Cayman Islands Branch $ 38,385 43 9.8 % December 31, 2019 Counterparty Stockholders’ Equity Weighted Average Percentage of Barclays Capital Inc. $ 77,334 277 9.1 % Citigroup Global Markets Inc. 50,263 22 5.9 % The Company’s financing arrangements generally include customary representations, warranties, and covenants, but may also contain more restrictive supplemental terms and conditions. Although specific to each financing arrangement, typical supplemental terms include requirements of minimum equity, leverage ratios, performance triggers or other financial ratios. As of September 30, 2020, the Company is in compliance with all of its financial covenants.

Other assets and liabilities

Other assets and liabilities	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other assets and liabilities	Other assets and liabilities The following table details certain information related to the Company's "Other assets" and "Other liabilities" line items on its consolidated balance sheet as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Other assets Interest receivable $ 3,265 $ 13,548 Derivative assets, at fair value — 2,282 Other assets 5,382 4,378 Due from broker 512 1,697 Total Other assets $ 9,159 $ 21,905 Other liabilities Interest payable $ 654 $ 10,941 Derivative liabilities, at fair value 39 411 Due to affiliates (1) 13,766 5,226 Accrued expenses 4,351 6,175 Taxes payable — 815 Due to broker 2,134 1,107 Total Other liabilities $ 20,944 $ 24,675 (1) Refer to Note 11 for more information. Derivative assets and liabilities The Company’s derivatives may include interest rate swaps ("swaps"), TBAs, and swaption contracts. They may also include Eurodollar Futures, U.S. Treasury Futures, British Pound Futures, and Euro Futures (collectively, "Futures"). Derivatives have not been designated as hedging instruments. The Company uses these derivatives and may also utilize other instruments to manage interest rate risk, including long and short positions in U.S. Treasury securities. The Company uses foreign currency forward contracts to manage foreign currency risk and to protect the value or to fix the amount of certain investments or cash flows in terms of U.S. dollars. The following table presents the fair value of the Company's derivatives and other instruments and their balance sheet location at September 30, 2020 and December 31, 2019 (in thousands). Derivatives and Other Instruments (1) Designation Balance Sheet September 30, 2020 December 31, 2019 Pay Fix/Receive Float Interest Rate Swap Agreements (2) Non-Hedge Other assets $ — $ 199 Pay Fix/Receive Float Interest Rate Swap Agreements (2) Non-Hedge Other liabilities (39) (411) Payer Swaptions Non-Hedge Other assets — 2,083 (1) As of September 30, 2020, the Company applied a fair value reduction of $27.3 thousand on its British Pound Futures liabilities related to variation margin. As of December 31, 2019, the Company applied a fair value reduction of $19.7 thousand and $0.1 million to its Euro Futures liabilities and British Pound Futures liabilities, respectively, related to variation margin. (2) As of September 30, 2020, the Company applied a reduction in fair value of $0.2 million and $13.9 thousand to its interest rate swap assets and liabilities, respectively, related to variation margin. As of December 31, 2019, the Company applied a reduction in fair value of $10.8 million and $2.2 million to its interest rate swap assets and liabilities, respectively, related to variation margin. The following table summarizes information related to derivatives and other instruments (in thousands): Notional amount of non-hedge derivatives and other instruments: Notional Currency September 30, 2020 December 31, 2019 Pay Fix/Receive Float Interest Rate Swap Agreements USD $ 180,000 $ 1,848,750 Payer Swaptions USD — 650,000 Short positions on British Pound Futures (1) GBP 3,000 6,563 Short positions on Euro Futures (2) EUR — 1,500 (1) Each British Pound Future contract embodies £62,500 of notional value. (2) Each Euro Future contract embodies €125,000 of notional value. The following table summarizes gains/(losses) related to derivatives and other instruments (in thousands): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 Included within Unrealized gain/(loss) on derivative and other instruments, net Interest Rate Swaps $ 170 $ 4,656 $ (11,418) $ (15,108) Eurodollar Futures — 233 — 1,001 Swaptions 1,051 531 354 (243) U.S. Treasury Futures — (37) — (181) British Pound Futures (57) 31 129 31 Euro Futures — — 20 — TBAs — (1,307) — (866) U.S. Treasuries — — — 82 1,164 4,107 (10,915) (15,284) Included within Net realized gain/(loss) Interest Rate Swaps — (18,060) (65,368) (59,140) Eurodollar Futures — 107 — (1,122) Swaptions (1,051) — (2,437) (861) U.S. Treasury Futures — (510) — (139) British Pound Futures (108) (138) 406 (138) Euro Futures — — 68 — TBAs — 1,152 4,610 2,753 U.S. Treasuries — 231 — (18) (1,159) (17,218) (62,721) (58,665) Total income/(loss) $ 5 $ (13,111) $ (73,636) $ (73,949) Derivative and other instruments eligible for offset are presented gross on the consolidated balance sheets as of September 30, 2020 and December 31, 2019. The Company has not offset or netted any derivatives or other instruments with any financial instruments or cash collateral posted or received. The Company must post cash or securities as collateral on its derivative instruments when their fair value declines. This typically occurs when prevailing market rates change adversely, with the severity of the change also dependent on the term of the derivatives involved. The posting of collateral is generally bilateral, meaning that if the fair value of the Company’s derivatives increases, its counterparty will post collateral to it. As of September 30, 2020, the Company did not pledge any real estate securities as collateral against certain derivatives and pledged $3.1 million of cash as collateral against certain derivatives. Of the $3.1 million of cash pledged as collateral against certain derivatives, $0.2 million represents amounts related to variation margin. As of December 31, 2019, the Company pledged real estate securities with a fair value of $3.0 million and cash of $32.1 million as collateral against certain derivatives. Of the $32.1 million of cash pledged as collateral against certain derivatives, $8.5 million represents amounts related to variation margin. The Company’s counterparties posted a de minimis amount of cash as collateral against certain derivatives as of September 30, 2020 and December 31, 2019. Interest rate swaps To help mitigate exposure to increases in interest rates, the Company may use currently-paying and forward-starting, one- or three-month LIBOR-indexed, pay-fixed, receive-variable, interest rate swap agreements. This arrangement hedges the Company's exposure to higher interest rates because the variable-rate payments received on the swap agreements largely offset additional interest accruing on the related borrowings due to the higher interest rate, leaving the fixed-rate payments to be paid on the swap agreements as the Company’s effective borrowing rate, subject to certain adjustments including changes in spreads between variable rates on the swap agreements and actual borrowing rates. As of September 30, 2020, the Company’s interest rate swap positions consisted of pay-fixed interest rate swaps. The following table presents information about the Company’s interest rate swaps as of September 30, 2020 ($ in thousands): Maturity Notional Amount Weighted Average Weighted Average Weighted Average 2025 $ 136,000 0.34 % 0.13 % 4.95 2030 44,000 0.68 % 0.12 % 9.96 Total/Wtd Avg $ 180,000 0.42 % 0.13 % 6.18 As of December 31, 2019, the Company’s interest rate swap positions consisted of pay-fixed interest rate swaps. The following table presents information about the Company’s interest rate swaps as of December 31, 2019 ($ in thousands): Maturity Notional Amount Weighted Average Weighted Average Weighted Average 2020 $ 105,000 1.54 % 1.91 % 0.20 2022 743,000 1.64 % 1.91 % 2.68 2023 5,750 3.19 % 1.91 % 3.85 2024 650,000 1.52 % 1.90 % 4.80 2026 180,000 1.50 % 1.89 % 6.70 2029 165,000 1.77 % 1.94 % 9.85 Total/Wtd Avg $ 1,848,750 1.60 % 1.91 % 4.32 TBAs The Company did not hold any TBA positions for the three months ended September 30, 2020. The following tables present information about the Company’s TBAs for the three months ended September 30, 2019 and nine months ended September 30, 2020 and September 30, 2019 (in thousands): For the Three Months Ended: Beginning Notional Amount Buys or Covers Sales or Shorts Ending Net Notional Amount Net Fair Value as of Period End Net Receivable/(Payable) from/to Broker Derivative Asset Derivative Liability September 30, 2019 TBAs - Long $ 125,000 $ 475,000 $ (450,000) $ 150,000 $ 153,175 $ (154,042) $ 386 $ (1,253) TBAs - Short $ (100,000) $ 300,000 $ (200,000) $ — $ — $ — $ — $ — For the Nine Months Ended: Beginning Notional Amount Buys or Covers Sales or Shorts Ending Net Notional Amount Net Fair Value as of Period End Net Receivable/(Payable) from/to Broker Derivative Asset Derivative Liability September 30, 2020 TBAs - Long $ — $ 728,000 $ (728,000) $ — $ — $ — $ — $ — September 30, 2019 TBAs - Long $ — $ 1,869,500 $ (1,719,500) $ 150,000 $ 153,175 $ (154,042) $ 386 $ (1,253) TBAs - Short $ — $ 485,000 $ (485,000) $ — $ — $ — $ — $ —

Earnings per share

Earnings per share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings per share	Earnings per share Basic earnings per share ("EPS") is calculated by dividing net income/(loss) available to common stockholders for the period by the weighted average shares of the Company’s common stock outstanding for that period that participate in the Company’s common dividends. Diluted EPS takes into account the effect of dilutive instruments, such as stock options, warrants, unvested restricted stock and unvested restricted stock units but uses the average share price for the period in determining the number of incremental shares that are to be added to the weighted average number of shares outstanding. The Company had no unvested restricted stock units as of September 30, 2020 and 20.0 thousand unvested restricted outstanding stock units as of September 30, 2019. Restricted stock units granted to the Manager do not entitle the participant the rights of a shareholder of the Company’s common stock, such as dividend and voting rights, until shares are issued in settlement of the vested units. The restricted stock units are not considered to be participating shares. The dilutive effects of the restricted stock units are only included in diluted weighted average common shares outstanding. The following table presents a reconciliation of the earnings and shares used in calculating basic and diluted EPS for the three and nine months ended September 30, 2020 and September 30, 2019 (in thousands, except per share data): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 Numerator: Net Income/(Loss) from Continuing Operations $ 20,046 $ 11,106 $ (462,271) $ 61,166 Gain on Exchange Offer, net 539 — 539 — Dividends on preferred stock (5,563) (3,720) (16,897) (10,455) Net income/(loss) from continuing operations available to common stockholders $ 15,022 $ 7,386 $ (478,629) $ 50,711 Net Income/(Loss) from Discontinued Operations — (1,057) 361 (3,284) Net income/(loss) available to common stockholders $ 15,022 $ 6,329 $ (478,268) $ 47,427 Denominator: Basic weighted average common shares outstanding 34,422 32,736 33,347 32,007 Dilutive effect of restricted stock units — 12 — 9 Diluted weighted average common shares outstanding 34,422 32,748 33,347 32,016 Earnings/(Loss) Per Share - Basic Continuing Operations $ 0.44 $ 0.22 $ (14.35) $ 1.58 Discontinued Operations — (0.03) 0.01 (0.10) Total Earnings/(Loss) Per Share of Common Stock $ 0.44 $ 0.19 $ (14.34) $ 1.48 Earnings/(Loss) Per Share - Diluted Continuing Operations $ 0.44 $ 0.22 $ (14.35) $ 1.58 Discontinued Operations — (0.03) 0.01 (0.10) Total Earnings/(Loss) Per Share of Common Stock $ 0.44 $ 0.19 $ (14.34) $ 1.48 On March 27, 2020, the Company announced that its Board of Directors approved a suspension of the Company's quarterly dividends on its common stock, 8.25% Series A Cumulative Redeemable Preferred Stock, 8.00% Series B Cumulative Redeemable Preferred Stock, and 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, beginning with the common stock dividend that normally would have been declared in March 2020 and the preferred stock dividend that would have been declared in May 2020, in order to conserve capital and improve its liquidity position during the market volatility due to the COVID-19 pandemic. As a result, the Company did not declare or accrue quarterly dividends on its Common or Preferred Stock during the three months ended June 30, 2020 and the three months ended September 30, 2020. If the Company’s Board of Directors does not declare a dividend in a given period, an accrual is not recorded on the balance sheet. However, undeclared preferred stock dividends are reflected in earnings per share as discussed in ASC 260-10-45-11. Pursuant to their terms, all unpaid dividends on the Company’s preferred stock accrue without interest, and if dividends on the Company's preferred stock are in arrears, the Company cannot pay cash dividends with respect to its Common Stock. Refer to Note 12 for more information on the Company's common and preferred stock. Refer to "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations - Book value per share" for a discussion of the treatment of accumulated, unpaid, or undeclared preferred dividends on the Company's book value. Subsequent to quarter end, the Company announced that its Board of Directors has approved, and the Company has declared and set apart for payment on December 17, 2020, the next regular payment date, all accrued and unpaid cash dividends on its 8.25% Series A Cumulative Redeemable Preferred Stock, 8.00% Series B Cumulative Redeemable Preferred Stock, and 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock that were in arrears as well as the full dividends payable on the preferred stock for the fourth quarter of 2020 in the amount of $1.54689, $1.50 and $1.50 per share, respectively. The dividends will be paid on December 17, 2020 to holders of record on November 30, 2020. As of September 30, 2020, the Company's book value does not include any accrual of accumulated, unpaid, or undeclared dividends on its Cumulative Redeemable Preferred Stock. As such, the Company's book value will decrease by the amount of the dividends declared during the fourth quarter. The Company's book value per share as of September 30, 2020 would be $0.31 lower after deducting the accumulated and unpaid preferred dividends outstanding as of September 30, 2020. The following table details the aggregate and per-share amounts of arrearages in cumulative, unpaid, and undeclared preferred dividends as of September 30, 2020 (in thousands, except per share data): Class of Stock Dividend Per Preferred Share in Arrears Amount of Preferred Dividend in Arrears 8.25% Series A $ 1.03126 $ 2,091 8.00% Series B 1.00 4,569 8.000% Series C 1.00 4,571 Total $ 11,231 Preferred stock dividends that are not declared accumulate and are added to the liquidation preference as of the scheduled payment date for the respective series of the preferred stock. The following tables detail the Company's common stock dividends declared during the nine months ended September 30, 2019: 2019 Declaration Date Record Date Payment Date Dividend Per Share 3/15/2019 3/29/2019 4/30/2019 $ 0.50 6/14/2019 6/28/2019 7/31/2019 0.50 9/6/2019 9/30/2019 10/31/2019 0.45 Total $ 1.45 The following tables detail the Company's preferred stock dividends during the nine months ended September 30, 2020 and September 30, 2019. Cash Dividend Per Share Declaration Date Record Date Payment Date 8.25% Series A 8.00% Series B 8.000% Series C 2/14/2020 2/28/2020 3/17/2020 $ 0.51563 $ 0.50 $ 0.50 2/15/2019 2/28/2019 3/18/2019 0.51563 0.50 — 5/17/2019 5/31/2019 6/17/2019 0.51563 0.50 — 8/16/2019 8/30/2019 9/17/2019 0.51563 0.50 —

Income taxes

Income taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income taxes	Income taxes As a REIT, the Company is not subject to federal income tax to the extent that it makes qualifying distributions to its stockholders, and provided it satisfies on a continuing basis, through actual investment and operating results, the REIT requirements including certain asset, income, distribution and stock ownership tests. Most states follow U.S. federal income tax treatment of REITs. For the three months ended September 30, 2020, the Company did not record any excise tax expense. For the nine months ended September 30, 2020, the Company recorded excise tax expense of $(0.8) million. The reversal of the previously accrued excise tax expense is a result of losses resulting from market conditions associated with the COVID-19 pandemic. For the three and nine months ended September 30, 2019, the Company recorded excise tax expense of $0.2 million and $0.5 million, respectively. Excise tax represents a four percent tax on the required amount of the Company’s ordinary income and net capital gains not distributed during the year. The expense is calculated in accordance with applicable tax regulations. The Company files tax returns in several U.S jurisdictions. There are no ongoing U.S. federal, state or local tax examinations related to the Company. The Company elected to treat certain domestic subsidiaries as TRSs and may elect to treat other subsidiaries as TRSs. 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. The Company elected to treat one of its foreign subsidiaries as a TRS and, accordingly, taxable income generated by this TRS may not be subject to local income taxation, but generally will be included in the Company’s income on a current basis as Subpart F income, whether or not distributed. Cash distributions declared by the Company that do not exceed its current or accumulated earnings and profits will be considered ordinary income to stockholders for income tax purposes unless all or a portion of a distribution is designated by the Company as a capital gain dividend. Distributions in excess of the Company’s current and accumulated earnings and profits will be characterized as return of capital or capital gains. Based on its analysis of any potential uncertain income tax positions, the Company concluded it did not have any uncertain tax positions that meet the recognition or measurement criteria of ASC 740 as of September 30, 2020 or September 30, 2019. The Company’s federal income tax returns for the last three tax years are open to examination by the Internal Revenue Service. In the event that the Company incurs income tax related interest and penalties, its policy is to classify them as a component of provision for income taxes.

Related party transactions

Related party transactions	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Related party transactions	Related party transactions The Company has entered into a management agreement with the Manager, which provided for an initial term and will be deemed renewed automatically each year for an additional one-year period, subject to certain termination rights. As of September 30, 2020 and December 31, 2019, no event of termination had occurred. The Company is externally managed and advised by the Manager. Pursuant to the terms of the management agreement, which became effective July 6, 2011 (upon the consummation of the Company’s initial public offering (the "IPO")), the Manager provides the Company with its management team, including its officers, along with appropriate support personnel. Each of the Company’s officers is an employee of Angelo Gordon. The Company does not have any employees. The Manager, pursuant to a delegation agreement dated as of June 29, 2011, has delegated to Angelo Gordon the overall responsibility of its day-to-day duties and obligations arising under the Company’s management agreement. Management fee The Manager is entitled to a management fee equal to 1.50% per annum, calculated and paid quarterly, of the Company’s Stockholders’ Equity. For purposes of calculating the management fee, "Stockholders’ Equity" means the sum of the net proceeds from any issuances of equity securities (including preferred securities) since inception (allocated on a pro rata daily basis for such issuances during the fiscal quarter of any such issuance, and excluding any future equity issuance to the Manager), plus the Company’s retained earnings at the end of such quarter (without taking into account any non-cash equity compensation expense or other non-cash items described below incurred in current or prior periods), less any amount that the Company pays for repurchases of its common stock, excluding any unrealized gains, losses or other non-cash items that have impacted stockholders’ equity as reported in the Company’s financial statements prepared in accordance with GAAP, regardless of whether such items are included in other comprehensive income or loss, or in net income, and excluding one-time events pursuant to changes in GAAP, and certain other non-cash charges after discussions between the Manager and the Company’s independent directors and after approval by a majority of the Company’s independent directors. Stockholders’ Equity, for purposes of calculating the management fee, could be greater or less than the amount of stockholders’ equity shown on the Company’s financial statements. For the three and nine months ended September 30, 2020, the Company incurred management fees of approximately $1.7 million and $5.5 million, respectively. For the three and nine months ended September 30, 2019, the Company incurred management fees of approximately $2.3 million and $7.1 million, respectively. As of September 30, 2020 and December 31, 2019, the Company recorded management fees payable of $1.2 million and $2.7 million, respectively. On April 6, 2020, the Company and the Manager executed an amendment to the management agreement pursuant to which the Manager agreed to defer the Company's payment of the management fee effective Q1 2020 through September 30, 2020, or such other time as the Company and the Manager agree. On September 24, 2020, the Company and the Manager executed another amendment (the "Second Management Agreement Amendment") to the management agreement, pursuant to which the Manager agreed to receive a portion of the accrued base management fee owed to it in shares of common stock. Pursuant to the Second Management Agreement Amendment, the Manager agreed to accept (i) 1,215,370 shares of common stock in full satisfaction of the deferred base management fee of $3.8 million payable by the Company in respect to the first and second quarters of 2020 and (ii) 154,500 shares of common stock in satisfaction of $0.5 million of the base management fee payable by the Company in respect to the third quarter of 2020. The shares of Common Stock issued to the Manager were valued at $3.15 per share based on the midpoint of the estimated range of the Company’s book value per share as of August 31, 2020. The remaining third quarter management fee will be paid in the normal course of business. Termination fee The termination fee, payable upon the occurrence of (i) the Company’s termination of the management agreement without cause or (ii) the Manager’s termination of the management agreement upon a breach by the Company of any material term of the management agreement, will be equal to three times the average annual management fee during the 24-month period prior to such termination, calculated as of the end of the most recently completed fiscal quarter. As of September 30, 2020 and December 31, 2019, no event of termination of the management agreement had occurred. Expense reimbursement The Company is required to reimburse the Manager or its affiliates for operating expenses which are incurred by the Manager or its affiliates on behalf of the Company, including expenses relating to legal, accounting, due diligence and other services. The Company’s reimbursement obligation is not subject to any dollar limitation; however, the reimbursement is subject to an annual budget process which combines guidelines from the Management Agreement with oversight by the Company’s Board of Directors. The Company reimburses the Manager or its affiliates for the Company’s allocable share of the compensation, including, without limitation, annual base salary, bonus, any related withholding taxes and employee benefits paid to (i) the Company’s chief financial officer based on the percentage of time spent on Company affairs, (ii) the Company’s general counsel based on the percentage of time spent on the Company’s affairs, and (iii) other corporate finance, tax, accounting, internal audit, legal, risk management, operations, compliance and other non-investment personnel of the Manager and its affiliates who spend all or a portion of their time managing the Company’s affairs based upon the percentage of time devoted by such personnel to the Company’s affairs. In their capacities as officers or personnel of the Manager or its affiliates, they devote such portion of their time to the Company’s affairs as is necessary to enable the Company to operate its business. Of the $5.9 million and $11.3 million of Other operating expenses for the three and nine months ended September 30, 2020, respectively, the Company has incurred $2.3 million and $6.2 million, respectively, representing a reimbursement of expenses. Of the $6.1 million and $13.7 million of Other operating expenses for the three and nine months ended September 30, 2019, respectively, the Company has incurred $1.6 million and $5.5 million, respectively, representing a reimbursement of expenses. As of September 30, 2020 and December 31, 2019, the Company recorded a reimbursement payable to the Manager of $2.2 million and $2.5 million, respectively. On April 6, 2020, the Company and the Manager executed an amendment to the management agreement pursuant to which the Manager agreed to defer the Company's payment of the reimbursement of expenses effective Q1 2020 through September 30, 2020, or such other time as the Company and the Manager agree. As of September 30, 2020, the Company has reimbursed the Manager for expenses through the second quarter of 2020. Expenses related to the third quarter will be paid in the normal course of business. Secured debt On April 10, 2020, in connection with the first Forbearance Agreement, the Company issued a secured promissory note (the "Note") to the Manager evidencing a $10 million loan made by the Manager to the Company. Additionally, on April 27, 2020, in connection with the second Forbearance Agreement, the Company and the Manager entered into an amendment to the Note to reflect an additional $10 million loan by the Manager to the Company. The $10 million loan made by the Manager on April 10, 2020 is payable on March 31, 2021, and the $10 million loan made on April 27, 2020 was repaid in full with interest when it matured on July 27, 2020. The unpaid balance of the Note accrues interest at a rate of 6.0% per annum. Interest on the Note is payable monthly in kind through the addition of such accrued monthly interest to the outstanding principal balance of the Note. Restricted stock grants Effective on April 15, 2020 upon the approval of the Company's stockholders at its Annual Meeting, the 2020 Equity Incentive Plan provides for 2,000,000 shares of common stock to be issued. The maximum number of shares of common stock granted during a single fiscal year to any non-employee director, taken together with any cash fees paid to such non-employee director during any fiscal year, shall not exceed $300,000 in total value (calculating the value of any such awards based on the grant date fair value). As of September 30, 2020, 1,901,106 shares of common stock were available to be awarded under the Equity Incentive Plan. Since its IPO, the Company has granted an aggregate of 204,688 and 40,250 shares of restricted common stock to its independent directors and Manager, respectively, and 120,000 restricted stock units to its Manager under its equity incentive plans. As of September 30, 2020, all the shares of restricted common stock granted to the Company’s Manager and independent directors have vested and all the restricted stock units granted to the Company’s Manager have vested. The units do not entitle the participant the rights of a holder of the Company’s common stock, such as dividend and voting rights, until shares are issued in settlement of the vested units. Director compensation Beginning in 2018, the Company began paying a $160,000 annual base director’s fee to each independent director. Base director’s fees are paid 50% in cash and 50% in restricted common stock. The number of shares of restricted common stock to be issued each quarter to each independent director is determined based on the average of the high and low prices of the Company’s common stock on the New York Stock Exchange on the last trading day of each fiscal quarter. To the extent that any fractional shares would otherwise be issuable and payable to each independent director, a cash payment is made to each independent director in lieu of any fractional shares. All directors’ fees are paid pro rata (and restricted stock grants determined) on a quarterly basis in arrears, and shares issued are fully vested and non-forfeitable. These shares may not be sold or transferred by such director during the time of their service as an independent member of the Company’s board. Beginning in 2019, the Company increased the annual fee paid to the lead independent director from $15,000 to $25,000. On March 25, 2020, the Company's Board of Directors decreased from 5 independent directors to 4 independent directors. On June 19, 2020, the Company's Board of Directors decreased from 4 independent directors to 3 independent directors. Pursuant to the Forbearance Agreement previously discussed, the Company, among other things, agreed to compensate its independent directors solely with common stock for the quarter ended March 31, 2020. Investments in debt and equity of affiliates The Company invests in credit sensitive residential and commercial real estate assets through affiliated entities which hold an ownership interest in the assets. The Company is one investor, amongst other investors managed by affiliates of Angelo Gordon, in such entities and has applied the equity method of accounting for such investments. See Note 2 for the gross fair value of the Company's share of these investments as of September 30, 2020 and December 31, 2019. During Q3 2018, the Company transferred certain of its CMBS from certain of its non-wholly owned subsidiaries to a fully consolidated entity. See Note 2 for further detail. The Company’s investment in AG Arc is reflected on the "Investments in debt and equity of affiliates" line item on its consolidated balance sheets. The Company has an approximate 44.6% interest in AG Arc. See Note 2 for the fair value of AG Arc as of September 30, 2020 and December 31, 2019. In June 2016, Arc Home closed on the acquisition of a Fannie Mae, Freddie Mac, Federal Housing Administration ("FHA"), Veteran’s Administration ("VA") and Ginnie Mae seller/servicer of mortgages, currently with licenses to conduct business in 50 states, including Washington D.C. Through this subsidiary, Arc Home originates conforming, Government, Jumbo, Non-QM and other non-conforming residential mortgage loans, retains the mortgage servicing rights associated with the loans it originates, and purchases additional mortgage servicing rights from third-party sellers. Arc Home is led by an external management team. Arc Home may sell loans to the Company, to third parties, or to affiliates of the Manager. Arc Home may also enter into agreements with third parties or affiliates of the Manager to sell rights to receive the excess servicing spread related to MSRs that it either purchases from third parties or originates. The Company, directly or through its subsidiaries, has entered into agreements with Arc Home to purchase rights to receive the excess servicing spread related to certain of Arc Home's MSRs. As of September 30, 2020 and December 31, 2019, these Excess MSRs had fair value of approximately $3.9 million and $18.2 million, respectively. See below "Transactions with affiliates" and Note 5 for details regarding the sale of a portion of the Company's Excess MSRs during the third quarter of 2020. During the third quarter of 2020, Arc Home began selling Non-QM loans to a private fund under the management of Angelo Gordon. Arc Home sold $4.6 million of unpaid principal balance of Non-QM loans to this affiliate of the Manager in September 2020. On August 29, 2017, the Company, alongside private funds under the management of Angelo Gordon, entered into the MATH LLC Agreement, which requires that MATH fund a capital commitment of $75.0 million to MATT. This commitment was increased by $25.0 million to $100.0 million on March 28, 2019 and by $5.0 million to $105.0 million on August 23, 2019 with amendments to the MATH LLC Agreement. On April 3, 2020, the financing arrangements within MATT were restructured and the previously mentioned commitment was removed. Refer to Note 2 for further detail on this restructuring. The Company has an approximate 44.6% interest in MATH. On May 15, 2019 and November 14, 2019, the Company, alongside private funds under the management of Angelo Gordon and a third party, entered into the LOTS I and LOTS II Agreements, respectively (collectively, "LOTS"), which requires the Company to fund various commitments to LOTS in connection with the origination of Land Related Financing. Refer to Note 13 for additional information. The Company has an approximate 47.5% and 50% interest in LOTS I and LOTS II, respectively. Transactions with affiliates In connection with the Company’s investments in residential mortgage loans, residential mortgage loans in securitized form which are issued by an entity in which the Company holds an equity interest in and which are held alongside other private funds under the management of Angelo Gordon (the "Re/Non-Performing Loans") and non-QM loans, the Company may engage asset managers to provide advisory, consultation, asset management and other services. Beginning in November 2015, the Company also engaged Red Creek Asset Management LLC ("Asset Manager"), an affiliate of the Manager and direct subsidiary of Angelo Gordon, as the asset manager for certain of its Re/Non-Performing Loans. Beginning in September 2019, the Company engaged the Asset Manager as the asset manager for its non-QM loans. The Company pays the Asset Manager separate arm’s-length asset management fees as assessed and confirmed periodically by a third party valuation firm for its Re/Non-Performing Loans and non-QM loans. In the third quarter of 2019, the third party assessment of asset management fees resulted in the Company updating the fee amount for its Re/Non-Performing Loans. The Company also utilized the third party valuation firm to establish the fee level for non-QM loans in the third quarter of 2019. For the three and nine months ended September 30, 2020, the fees paid by the Company to the Asset Manager totaled $0.6 million and $2.1 million, respectively. For the three and nine months ended September 30, 2019, the fees paid by the Company to the Asset Manager totaled $0.1 million and $0.4 million, respectively. These fees include amounts paid directly by the Company and amounts paid by trustees in securitizations that the Company owns residual interests in. In connection with the Company’s investments in Excess MSRs purchased through Arc Home, the Company pays an administrative fee to Arc Home. For the three and nine months ended September 30, 2020, the administrative fees paid by the Company to Arc Home totaled $42.0 thousand and $0.2 million, respectively. For the three and nine months ended September 30, 2019, the administrative fees paid by the Company to Arc Home totaled $0.1 million and $0.2 million, respectively. In March 2019, in accordance with the Company’s Affiliated Transactions Policy, the Company executed one trade whereby the Company acquired a real estate security from an affiliate of the Manager (the "March 2019 Selling Affiliate"). As of the date of the trade, the security acquired from the March 2019 Selling Affiliate had a total fair value of $0.9 million. The March 2019 Selling Affiliate sold the real estate security through a BWIC (Bids Wanted in Competition). Prior to the submission of the BWIC by the March 2019 Selling Affiliate, the Company submitted its bid for the real estate security to the March 2019 Selling Affiliate. The pre-submission of the Company's bid allowed the Company to confirm third-party market pricing and best execution. In June 2019, the Company, alongside private funds under the management of Angelo Gordon, participated, through its unconsolidated ownership interest in MATT, in a rated non-QM loan securitization, in which non-QM loans with a fair value of $408.0 million were securitized. Certain senior tranches in the securitization were sold to third parties with the Company and private funds under the management of Angelo Gordon retaining the subordinate tranches, which had a fair value of $42.9 million as of June 30, 2019. The Company has a 44.6% interest in the retained subordinate tranches. In July 2019, in accordance with the Company’s Affiliated Transactions Policy, the Company acquired certain real estate securities from an affiliate of the Manager (the "July 2019 Selling Affiliate"). As of the date of the trade, the real estate securities acquired from the July 2019 Selling Affiliate had a total fair value of $2.0 million. As procuring market bids for the real estate securities was determined to be impracticable in the Manager’s reasonable judgment, appropriate pricing was based on a valuation prepared by independent third-party pricing vendors. The third-party pricing vendors allowed the Company to confirm third-party market pricing and best execution. In September 2019, the Company, alongside private funds under the management of Angelo Gordon, participated, through its unconsolidated ownership interest in MATT, in a rated non-QM loan securitization, in which non-QM loans with a fair market value of $415.1 million were securitized. Certain senior tranches in the securitization were sold to third parties with the Company and private funds under the management of Angelo Gordon retaining the subordinate tranches, which had a fair market value of $28.7 million as of September 30, 2019. The Company has a 44.6% interest in the retained subordinate tranches. In October 2019, in accordance with the Company’s Affiliated Transactions Policy, the Company acquired certain real estate securities from an affiliate of the Manager (the "October 2019 Selling Affiliate"). As of the date of the trade, the real estate securities acquired from the October 2019 Selling Affiliate had a total fair value of $2.2 million. The October 2019 Selling Affiliate sold the real estate securities through a BWIC. Prior to the submission of the BWIC by the October 2019 Selling Affiliate, the Company submitted its bid for real estate securities to the October 2019 Selling Affiliate. The Company’s pre-submission of its bid allowed the Company to confirm third-party market pricing and best execution. In November 2019, the Company, alongside private funds under the management of Angelo Gordon, participated through its unconsolidated ownership interest in MATT in a rated non-QM loan securitization, in which non-QM loans with a fair value of $322.1 million were securitized. Certain senior tranches in the securitization were sold to third parties with the Company and private funds under the management of Angelo Gordon retaining the subordinate tranches, which had a fair value of $21.4 million as of December 31, 2019. The Company has a 44.6% interest in the retained subordinate tranches. In February 2020, the Company, alongside private funds under the management of Angelo Gordon, participated through its unconsolidated ownership interest in MATT in a rated non-QM loan securitization, in which non-QM loans with a fair value of $348.2 million were securitized. Certain senior tranches in the securitization were sold to third parties with the Company and private funds under the management of Angelo Gordon retaining the subordinate tranches, which had a fair value of $26.6 million as of March 31, 2020. The Company has a 44.6% interest in the retained subordinate tranches. In July 2020, in accordance with the Company’s Affiliated Transactions Policy, the Company sold certain real estate securities to an affiliate of the Manager (the "July 2020 Acquiring Affiliate"). As of the date of the trade, the real estate securities sold to the July 2020 Acquiring Affiliate had a total fair value of $1.9 million. The July 2020 Acquiring Affiliate purchased the real estate securities through a BWIC. Prior to the submission of the BWIC by the Company, the July 2020 Acquiring Affiliate submitted its bid for real estate securities to the Company. The July 2020 Acquiring Affiliate’s pre-submission of its bid allowed the Company to confirm third-party market pricing and best execution. In August 2020, the Company, alongside private funds under the management of Angelo Gordon, participated through its unconsolidated ownership interest in MATT in a rated non-QM loan securitization, in which non-QM loans with a fair value of $226.0 million were securitized. Certain senior tranches in the securitization were sold to third parties with the Company and private funds under the management of Angelo Gordon retaining the subordinate tranches, which had a fair value of $24.3 million as of September 30, 2020. The Company has a 44.6% interest in the retained subordinate tranches.

Equity

Equity	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Equity	Equity On May 2, 2018, the Company filed a shelf registration statement registering up to $750.0 million of its securities, including capital stock (the "2018 Registration Statement"). As of September 30, 2020, $591.2 million of the Company’s securities, including capital stock, was available for issuance under the 2018 Registration Statement. The 2018 Registration Statement became effective on May 18, 2018 and will expire on May 18, 2021. Concurrently with the IPO in 2011, the Company completed a private placement of 3,205,000 units at $20.00 per share to a limited number of investors qualifying as "accredited investors" under Rule 501 of Regulation D promulgated under the Securities Act of 1933, as amended (the "Securities Act"). Each unit consisted of one share of common stock ("private placement share") and a warrant ("private placement warrant") to purchase 0.50 of a share of common stock. Each private placement warrant had an exercise price of $20.50 per share (as adjusted for reorganizations, reclassifications, consolidations, mergers, sales, transfers or other dispositions) and expired on July 6, 2018. No warrants were exercised in 2018 through the expiration date on July 6, 2018. In addition to the Company’s Series A and Series B Preferred Stock, the Company completed a public offering of 4,000,000 shares of 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock with a liquidation preference of $25.00 per share (the "Series C Preferred Stock") on September 17, 2019. The Company subsequently issued 600,000 shares of Series C Preferred Stock pursuant to the underwriters' exercise of their over-allotment option. The Company received total gross proceeds of $115.0 million and net proceeds of approximately $111.2 million, net of underwriting discounts, commissions and expenses. The Company’s Series A, Series B and Series C Preferred Stock have no stated maturity and are not subject to any sinking fund or mandatory redemption. Under certain circumstances upon a change of control, the Company’s Series A, Series B and Series C Preferred Stock are convertible to shares of the Company’s common stock. Holders of the Company’s Series A, Series B and Series C Preferred Stock have no voting rights, except under limited conditions, and holders are entitled to receive cumulative cash dividends at a the respective stated rate per annum before holders of the common stock are entitled to receive any cash dividends. The dividend rate of the Series A and Series B preferred stock is 8.25% and 8.00% per annum, respectively, of the $25.00 per share liquidation preference. The initial dividend rate for the Series C Preferred Stock, from and including the date of original issue to, but not including, September 17, 2024, is 8.000% per annum of the $25.00 per share liquidation preference. On and after September 17, 2024, dividends on the Series C Preferred Stock will accumulate at a percentage of the $25.00 liquidation preference equal to an annual floating rate of the then three-month LIBOR plus a spread of 6.476% per annum. Shares of the Company’s Series A and Series B Preferred Stock are currently redeemable at $25.00 per share plus accumulated and unpaid dividends (whether or not declared) exclusively at the Company’s option. Shares of the Company's Series C Preferred Stock are redeemable at $25.00 per share plus accumulated and unpaid dividends (whether or not declared) exclusively at the Company’s option commencing on September 17, 2024, or earlier under certain circumstances intended to preserve its qualification as a REIT for Federal income tax purposes. Dividends are payable quarterly in arrears on the 17th day of each March, June, September and December. The Company's Series A, Series B and Series C Preferred Stock generally do 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, holders of the Company's Series A, Series B and Series C Preferred Stock voting together as a single class with the holders of all other classes or series of its preferred stock upon which like voting rights have been conferred and are exercisable and which are entitled to vote as a class with the Company's Series A, Series B and Series C Preferred Stock will be entitled to vote to elect two additional directors to the Company’s Board of Directors 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 any series of the Company's Series A, Series B and Series C Preferred Stock cannot be made without the affirmative vote of holders of at least two-thirds of the outstanding shares of the series of the Company's Series A, Series B and Series C Preferred Stock whose terms are being changed. As of September 30, 2020, the Company had not declared all required quarterly dividends on the Company’s Series A, Series B and Series C Preferred Stock. On March 27, 2020, the Company announced that its Board of Directors approved a suspension of the Company's quarterly dividends on its 8.25% Series A Cumulative Redeemable Preferred Stock, 8.00% Series B Cumulative Redeemable Preferred Stock and 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, beginning with the preferred dividend that would have been declared in May 2020, in order to conserve capital and improve its liquidity position during the market volatility due to the COVID-19 pandemic as well as a suspension of the quarterly dividend on the Common Stock, beginning with the dividend that normally would have been declared in March 2020. Refer to Note 9 for more information on the arrearages related to the Company's preferred stock. Under the terms of the Company's charter governing its series of preferred stock, the Company cannot pay cash dividends with respect to its common stock if dividends on its preferred stock are in arrears. On November 3, 2015, the Company’s Board of Directors authorized a stock repurchase program ("Repurchase Program") to repurchase up to $25.0 million of the Company's outstanding common stock. Such authorization does not have an expiration date. As part of the Repurchase Program, shares may be purchased in open market transactions, including through block purchases, through privately negotiated transactions, or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Exchange Act. Open market repurchases will be made in accordance with Exchange Act Rule 10b-18, which sets certain restrictions on the method, timing, price and volume of open market stock repurchases. Subject to applicable securities laws, the timing, manner, price and amount of any repurchases of common stock under the Repurchase Program may be determined by the Company in its discretion, using available cash resources. Shares of common stock repurchased by the Company under the Repurchase Program, if any, will be cancelled and, until reissued by the Company, will be deemed to be authorized but unissued shares of its common stock as required by Maryland law. The Repurchase Program may be suspended or discontinued by the Company at any time and without prior notice and the authorization does not obligate the Company to acquire any particular amount of common stock. The cost of the acquisition by the Company of shares of its own stock in excess of the aggregate par value of the shares first reduces additional paid-in capital, to the extent available, with any residual cost applied against retained earnings. No shares were repurchased under the Repurchase Program during the three and nine months ended September 30, 2020 and September 30, 2019, and approximately $14.6 million of common stock remained authorized for future share repurchases under the Repurchase Program. On May 5, 2017, the Company entered into an equity distribution agreement with each of Credit Suisse Securities (USA) LLC and JMP Securities LLC (collectively, the "Sales Agents"), which the Company refers to as the "Equity Distribution Agreements," pursuant to which the Company may sell up to $100.0 million aggregate offering price of shares of its common stock from time to time through the Sales Agents under the Securities Act of 1933. The Equity Distribution Agreements were amended on May 22, 2018 in conjunction with the filing of the Company’s 2018 Registration Statement. For the three and nine months ended September 30, 2020, the Company sold 0.4 million and 1.4 million shares of common stock under the Equity Distribution Agreements for net proceeds of approximately $1.2 million and $4.7 million, respectively. For the three and nine months ended September 30, 2019, the Company sold 0.5 million shares of common stock under the Equity Distribution Agreements for net proceeds of approximately $8.6 million. As of September 30, 2020, the Company has sold approximately 2.8 million shares of common stock under the Equity Distribution Agreements for gross proceeds of $32.3 million, with 67.7 million available to be issued. On February 14, 2019, the Company completed a public offering of 3,000,000 shares of its common stock and subsequently issued an additional 450,000 shares pursuant to the underwriters' exercise of their over-allotment option at a price of $16.70 per share. Net proceeds to the Company from the offering were approximately $57.4 million, after deducting estimated offering expenses. On August 14, 2020, the Company announced the commencement of an offer to exchange (the "Exchange Offer") newly issued shares of common stock for up to 250,470 shares of its Series A Preferred Stock, up to 556,600 shares of its Series B Preferred Stock, and up to 556,600 shares of its Series C Preferred Stock. The Exchange Offer had an expiration date of September 11, 2020. Based on the final count provided by the Exchange Agent, American Stock Transfer & Trust Company, LLC, a total of 42,820 shares of Series A Preferred Stock, 31,085 Series B Preferred Stock and 29,355 Series C Preferred Stock were validly tendered and not properly withdrawn prior to the expiration of the Exchange Offer. The Company accepted all such 103,260 validly tendered shares of preferred stock, and issued in exchange a total of 516,300 shares of Common Stock in reliance upon the exemption from registration provided under Section 3(a)(9) of the Securities Act of 1933, as amended. After settlement, the Company had outstanding 2,027,180 shares of Series A Preferred Stock, 4,568,915 shares of Series B Preferred Stock and 4,570,645 shares of Series C Preferred Stock. On September 24, 2020, the Company issued (i) 1,215,370 shares of common stock to the Manager in full satisfaction of the deferred base management fee of $3.8 million payable by the Company in respect to the first and second quarters of 2020 and (ii) 154,500 shares of common stock in satisfaction of $0.5 million of the base management fee payable by the Company in respect to the third quarter of 2020. The shares of Common Stock issued to the Manager were valued at $3.15 per share based on the midpoint of the estimated range of the Company’s book value per share as of August 31, 2020. The remaining third quarter management fee will be paid in the normal course of business. Refer to Note 11 for more information on this transaction. Subsequent to quarter end, the Company announced that its Board of Directors has approved, and the Company has declared and set apart for payment on December 17, 2020, the next regular payment date, all accrued and unpaid cash dividends on its 8.25% Series A Cumulative Redeemable Preferred Stock, 8.00% Series B Cumulative Redeemable Preferred Stock, and 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock that were in arrears as well as the full dividends payable on the preferred stock for the fourth quarter of 2020 in the amount of $1.54689, $1.50 and $1.50 per share, respectively. The dividends will be paid on December 17, 2020 to holders of record on November 30, 2020. As of September 30, 2020, the Company's book value does not include any accrual of accumulated, unpaid, or undeclared dividends on its

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, the Company may become involved in various claims and legal actions arising in the ordinary course of business. As of September 30, 2020, other than as set forth below, the Company was not involved in any material legal proceedings. On March 25, 2020, certain of the Company's subsidiaries filed a suit in federal district court in New York seeking to enjoin Royal Bank of Canada and one of its affiliates ("RBC") from selling certain assets that the Company had on repo with RBC and seeking damages ( AG MIT CMO et al. v. RBC (Barbados) Trading Corp. et al . , 20-cv-2547, U.S. District Court, Southern District of New York) . On March 31, 2020, the Company withdrew, as moot, its request for injunctive relief in the complaint based on the court's ruling on March 25, 2020 relating to the sale at issue. As previously disclosed in a Form 8-K filed with the SEC on June 2, 2020, the Company entered into a settlement agreement with RBC on May 28, 2020, pursuant to which the Company and RBC mutually released each other from further claims related to the repurchase agreements at issue. As part of the settlement, and to resolve all claims by either party under the repurchase agreements, the Company paid RBC $5.0 million in cash and issued to RBC a secured promissory note in the principal amount of $2.0 million. On June 11, 2020, the Company repaid the secured promissory note due to RBC in full. The Company has recognized this settlement in the "Net realized gain/(loss)" line item on the consolidated statement of operations. As a result, as of September 30, 2020, the Company has satisfied all of its payment obligations to RBC under the settlement agreement and promissory note, and, as previously reported, the federal lawsuit has been voluntarily dismissed with prejudice. As of September 30, 2020, the Company has also recorded a loss of $11.6 million related to deficiencies asserted by other counterparties. The Company has recognized these losses in the "Net realized gain/(loss)" line item on the consolidated statement of operations. As of August 2020, MITT resolved and settled all deficiency claims with lenders. The below table details the Company's outstanding commitments as of September 30, 2020 (in thousands): Commitment type Date of Commitment Total Commitment Funded Commitment Remaining Commitment Commercial loan G (a)(b) July 26, 2018 $ 78,806 $ 56,697 $ 22,109 Commercial loan I (a)(c) January 23, 2019 20,000 15,211 4,789 Commercial loan K (a) February 22, 2019 20,000 14,173 5,827 LOTS (d) Various 39,361 24,191 15,170 Total $ 158,167 $ 110,272 $ 47,895 (a) The Company entered into commitments on commercial loans relating to construction projects. See Note 4 for further details. (b) Paydowns of $5.7 million on Commercial loan G during the quarter decreased the total commitment from $84.5 million to $78.8 million. (c) Subsequent to quarter end, the Company and the borrower of Loan I entered into a modification agreement to, among other things, extend the term of the Loan, allow for a portion of the interest to be deferred and increase the capital commitment amount by $6.0 million. (d) Refer to Note 11 "Investments in debt and equity of affiliates" for more information regarding LOTS.

Discontinued Operations and Ass

Discontinued Operations and Assets and Liabilities Held for Sale	9 Months Ended
	Sep. 30, 2020
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Assets and Liabilities Held for Sale	Discontinued Operations and Assets and Liabilities Held for SaleIn November 2019, the Company signed a purchase and sale agreement whereby it agreed to sell its portfolio of single-family rental properties to a third party at a price of approximately $137 million as the portfolio was under-performing. The Company recognized a gain of $0.2 million as a result of the transaction. The Company reclassified the operating results of its single-family rental properties segment as discontinued operations and excluded it from continuing operations for all periods presented. As of September 30, 2020 and December 31, 2019, the Company has disposed of substantially all of its single-family rental properties segment. The table below presents the Company's results of operations for the three and nine months ended September 30, 2020 and September 30, 2019, for the single-family rental properties segment's discontinued operations as reported separately as net income (loss) from discontinued operations, net of tax (in thousands). There was no net income or loss from discontinued operations for the three months ended September 30, 2020. Three Months Ended Nine Months Ended September 30, 2019 September 30, 2020 September 30, 2019 Interest expense $ (1,247) $ — $ (3,741) Other Income/(Loss) Rental income 3,309 — 9,868 Net realized gain/(loss) — — (96) Other income 34 — 346 Total Other Income/(Loss) 3,343 — 10,118 Expenses Other operating expenses 154 (80) 246 Property depreciation and amortization 1,013 — 3,640 Property operating expenses 1,986 (281) 5,775 Total Expenses 3,153 (361) 9,661 Net Income/(Loss) from Discontinued Operations $ (1,057) $ 361 $ (3,284) In the second quarter of 2020, the Company reversed certain previously accrued expenses related to discontinued operations. The table below presents the Company's statement of net positions for the years ended September 30, 2020 and December 31, 2019, respectively, for the single-family rental properties segment's discontinued operations as reported separately as assets and liabilities held for sale on our consolidated balance sheets (in thousands): September 30, 2020 December 31, 2019 Assets Other assets $ — $ 154 Liabilities Other liabilities $ 305 $ 1,546

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On September 30, 2020, the Company agreed to issue an aggregate of 3,679,634 shares of its common stock and agreed to pay aggregate cash consideration of $6.3 million in exchange for 210,662 shares of Series A Preferred Stock, 404,187 shares of Series B Preferred Stock, and 427,467 shares of Series C Preferred Stock, pursuant to a privately negotiated exchange agreement entered into on September 30, 2020 with existing holders of the preferred stock. After the transaction closed, the preferred stock exchanged pursuant to the exchange agreement were reclassified as authorized but unissued shares of preferred stock without designation as to class or series. On October 2, 2020, the Company agreed to issue an aggregate of 900,000 shares of its common stock and agreed to pay aggregate cash consideration of $1.7 million in exchange for 260,000 shares of Series C Preferred Stock, pursuant to a privately negotiated exchange agreement entered into on October 2, 2020 with existing holders of the Series C Preferred Stock. After the transaction closed, the Series C Preferred Stock exchanged pursuant to the exchange agreement were reclassified as authorized but unissued shares of preferred stock without designation as to class or series. Subsequent to quarter end, the Company announced that its Board of Directors has approved, and the Company has declared and set apart for payment on December 17, 2020, the next regular payment date, all accrued and unpaid cash dividends on its

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Cash and cash equivalents	Cash and cash equivalents Cash is comprised of cash on deposit with financial institutions. The Company classifies highly liquid investments with original maturities of three months or less from the date of purchase as cash equivalents. Cash equivalents includes cash invested in money market funds. As of September 30, 2020, the Company held $44.6 million of cash and cash equivalents, none of which were cash equivalents. As of December 31, 2019, the Company held $81.7 million of cash and cash equivalents, of which $53.2 million were cash equivalents. The Company places its cash with high credit quality institutions to reduce credit risk exposure. Cash pledged to the Company as collateral is unrestricted in use and, accordingly, is included as a component of "Cash and cash equivalents" on the consolidated balance sheets. Any cash held by the Company as collateral is included in the "Other liabilities" line item on the consolidated balance sheets and in cash flows from financing activities on the consolidated statement of cash flows. Due to broker, which is included in the "Other liabilities" line item on the consolidated balance sheets, does not include variation margin received on centrally cleared derivatives. See Note 8 for more detail. Any cash due to the Company in the form of principal payments is included in the "Other assets" line item on the consolidated balance sheets and in cash flows from operating activities on the consolidated statement of cash flows.
Restricted cash	Restricted cash Restricted cash includes cash pledged as collateral for clearing and executing trades, derivatives, and financing arrangements, as well as restricted cash deposited into accounts held at certain consolidated trusts. Prior to the disposition of the Company's SFR portfolio, restricted cash also included cash deposited into accounts related to rent deposits and collections, security deposits, property taxes, insurance premiums, interest expenses, property management fees and capital expenditures. Restricted cash is not available to the Company for general corporate purposes. Restricted cash may be returned to the Company when the related collateral requirements are exceeded or at the maturity of the derivative or financing arrangement. Restricted cash is carried at cost, which approximates fair value. Restricted cash does not include variation margin pledged on centrally cleared derivatives. See Note 8 for more detail.
Offering costs	Offering costs The Company has incurred offering costs in connection with common stock offerings, registration statements, preferred stock offerings and exchanges. Where applicable, the offering costs were paid out of the proceeds of the respective offerings. Offering costs in connection with common stock offerings and costs in connection with registration statements have been accounted for as a reduction of additional paid-in capital. Offering costs in connection with preferred stock offerings have been accounted for as a reduction of their respective gross proceeds. Exchange costs in connection with the Company's preferred stock exchanges have been accounted for as a reduction to the Company's retained earnings.
Use of estimates	Use of estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results may differ from those estimates. See Note 1 under " COVID-19 Impact " for more detail.
Earnings/(Loss) per share	Earnings/(Loss) per share In accordance with the provisions of Accounting Standards Codification ("ASC") 260, "Earnings per Share," the Company calculates basic income/(loss) per share by dividing net income/(loss) available to common stockholders for the period by weighted average shares of the Company’s common stock outstanding for that period. Diluted income per share takes into account the effect of dilutive instruments, such as stock options, warrants, unvested restricted stock and unvested restricted stock units but uses the average share price for the period in determining the number of incremental shares that are to be added to the weighted average number of shares outstanding. In periods in which the Company records a loss, potentially dilutive securities are excluded from the diluted loss per share calculation, as their effect on loss per share is anti-dilutive. See Note 9 for aggregate amounts of arrearages in cumulative preferred dividends and Note 12 for further detail on the Company’s common and preferred stock.
Valuation of financial instruments	Valuation of financial instruments The fair value of the financial instruments that the Company records at fair value is determined by the Manager, subject to oversight of the Company’s Board of Directors, and in accordance with ASC 820, "Fair Value Measurements and Disclosures." When possible, the Company determines fair value using independent data sources. ASC 820 establishes a hierarchy that prioritizes the inputs to valuation techniques giving the highest priority to readily available unadjusted quoted prices in active markets for identical assets (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements) when market prices are not readily available or reliable. The three levels of the hierarchy under ASC 820 are described below: • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Prices determined using other significant observable inputs. These may include quoted prices for similar securities, interest rates, prepayment speeds, credit risk and others. • Level 3 – Prices determined using significant unobservable inputs. In situations where quoted prices or observable inputs are unavailable (for example, when there is little or no market activity for an investment at the end of the period), unobservable inputs may be used. Unobservable inputs reflect the Company’s assumptions about the factors that market participants would use in pricing an asset or liability, and would be based on the best information available. Transfers between levels are assumed to occur at the beginning of the reporting period. At the beginning of the first quarter of 2020, the Manager completed a data collection and analysis effort, which supported an update to its Leveling policy under ASC 820. Among the data collected and analyzed were: (i) reports from TRACE, FINRA’s Trade Reporting and Compliance Engine, that reports over-the-counter secondary market transactions in eligible fixed income securities, (ii) information from pricing vendors regarding valuation approaches and observability of market color, (iii) data points collected from discussions with industry sources, including peer firms and audit firms, and (iv) its own data from back testing vendor pricing against its own trades. After analyzing this data, the Manager concluded that there was sufficient observability of market inputs used by its third-party pricing services for certain RMBS and CMBS positions previously categorized as Level 3 to meet the criteria for a Level 2 classification. The Company considered whether the volatile market conditions related to the COVID-19 pandemic would have an impact on its Leveling policy under ASC 820, as amended on January 1, 2020. Based on due diligence, there have been no significant changes in any of the pricing services’ fair value methodologies or processes as a result of COVID-19. The Company does not believe the pricing services’ ability to determine fair values has been adversely impacted. As a result, the Company concluded there was no migration from Level 2 to Level 3 as a result of COVID-19.
Accounting for real estate securities	Accounting for real estate securities Investments in real estate securities are recorded in accordance with ASC 320-10, "Investments – Debt and Equity Securities," ASC 325-40, "Beneficial Interests in Securitized Financial Assets," or ASC 310-30, "Loans and Debt Securities Acquired with Deteriorated Credit Quality." The Company has chosen to make a fair value election pursuant to ASC 825, "Financial Instruments" for its real estate securities portfolio. Real estate securities are recorded at fair value on the consolidated balance sheets and the periodic change in fair value is recorded in current period earnings on the consolidated statement of operations as a component of "Unrealized gain/(loss) on real estate securities and loans, net." Real estate securities acquired are shown in the line item "Purchase of real estate securities" on the consolidated statement of cash flows. Purchases and sales of real estate securities are recorded on the trade date. These investments meet the requirements to be classified as available for sale under ASC 320-10-25 which requires the securities to be carried at fair value on the consolidated balance sheets with changes in fair value recorded to other comprehensive income, a component of stockholders’ equity. Electing the fair value option allows the Company to record changes in fair value in the consolidated statement of operations, which, in management’s view, more appropriately reflects the results of operations for a particular reporting period as all securities activities will be recorded in a similar manner. The Company recognizes certain upfront costs and fees relating to securities for which the fair value option has been elected in current period earnings as incurred and does not defer those costs, which is in accordance with ASC 825-10-25. When the Company purchases securities with evidence of credit deterioration since origination, it will analyze the securities to determine if the guidance found in ASC 310-30 is applicable. In June 2016, FASB issued ASU 2016-13, "Financial Instruments – Credit Losses" ("ASU 2016-13"). This new guidance significantly changes how entities will measure credit losses for most financial assets, including loans, that are not measured at fair value with changes in fair value recognized through net income. The Company adopted the new guidance as of January 1, 2020. The new guidance specifically excludes available-for-sale securities and loans measured at fair value, with changes in fair value recognized through net income. Accordingly, the impact of the new guidance on accounting for the Company's debt securities and loans is limited to recognition of effective yield which was historically impacted by other than temporary impairment recorded under current standards. As the new guidance eliminates the accounting for other than temporary impairment, this guidance has impacted the Company's unrealized and realized gain/(loss) amounts. As the Company measures its debt securities and loans at fair value with any changes recognized through net income and updates its estimate of the cash flows expected to be collected on these asset classes on at least a quarterly basis recognizing changes in cash flows in interest income prospectively through an adjustment of an asset’s yield over its remaining life, the adoption of the standard did not have a material impact to the Company’s consolidated financial statements. Prior to the adoption of ASU 2016-13, the Company accounted for its securities under ASC 310 and ASC 325 and evaluated securities for other-than-temporary impairment ("OTTI") on at least a quarterly basis. The determination of whether a security was other-than-temporarily impaired involved judgments and assumptions based on subjective and objective factors. When the fair value of a real estate security was less than its amortized cost at the balance sheet date, the security was considered impaired, and the impairment was designated as either "temporary" or "other-than-temporary." When a real estate security was impaired, an OTTI was considered to have occurred if (i) the Company intended to sell the security (i.e., a decision has been made as of the reporting date) or (ii) it was more likely than not that the Company was required to sell the security before recovery of its amortized cost basis. If the Company intended to sell the security or if it was more likely than not that the Company was required to sell the real estate security before recovery of its amortized cost basis, the entire amount of the impairment loss, if any, was recognized in earnings as a realized loss and the cost basis of the security was adjusted to its fair value. Additionally, for securities accounted for under ASC 325-40 an OTTI was deemed to have occurred when there was an adverse change in the expected cash flows to be received and the fair value of the security was less than its carrying amount. In determining whether an adverse change in cash flows occurred, the present value of the remaining cash flows, as estimated at the initial transaction date (or the last date previously revised), was compared to the present value of the expected cash flows at the current reporting date. The estimated cash flows reflected those a "market participant" would use and included observations of current information and events, and assumptions related to fluctuations in interest rates, prepayment speeds and the timing and amount of potential credit losses. Cash flows were discounted at a rate equal to the current yield used to accrete interest income. Any resulting OTTI adjustments were reflected in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The determination as to whether an OTTI existed was subjective, given that such determination was based on information available at the time of assessment as well as the Company’s estimate of the future performance and cash flow projections for the individual security. As a result, the timing and amount of an OTTI constituted an accounting estimate that could change materially over time. Increases in interest income could have been recognized on a security on which the Company previously recorded an OTTI charge if the performance of such security subsequently improved. Sales of securities are driven by the Manager’s portfolio management process. The Manager seeks to mitigate risks including those associated with prepayments, defaults, severities, amongst others and will opportunistically rotate the portfolio into securities with more favorable attributes. Strategies may also be employed to manage net capital gains, which need to be distributed for tax purposes. Realized gains or losses on sales of securities, loans and derivatives are included in the "Net realized gain/(loss)" line item on the consolidated statement of operations. The cost of positions sold is calculated using a first in, first out ("FIFO") basis. Realized gains and losses are recorded in earnings at the time of disposition.
Accounting for residential and commercial mortgage loans	Accounting for residential and commercial mortgage loans Investments in mortgage loans are recorded in accordance with ASC 310-10, "Receivables." At purchase, the Company may aggregate its mortgage loans into pools based on common risk characteristics. Once a pool of loans is assembled, its composition is maintained. The Company has chosen to make a fair value election pursuant to ASC 825 for its mortgage loan portfolio. Electing the fair value option allows the Company to record changes in fair value in the Consolidated Statement of Operations, which, in management's view, more appropriately reflects the results of operations for a particular reporting period as all loan activities will be recorded in a similar manner. As such, loans are recorded at fair value on the consolidated balance sheets and any periodic change in fair value is recorded in current period earnings on the consolidated statement of operations as a component of "Unrealized gain/(loss) on real estate securities and loans, net." The Company recognizes certain upfront costs and fees relating to loans for which the fair value option has been elected in current period earnings as incurred and does not defer those costs, which is in accordance with ASC 825-10-25. Purchases and sales of mortgage loans are recorded on the settlement date, concurrent with the completion of due diligence and the removal of any contingencies. Prior to the settlement date, the Company will include commitments to purchase loans within the Commitments and Contingencies footnote to the financial statements. The Company amortizes or accretes any premium or discount over the life of the loans utilizing the effective interest method. On at least a quarterly basis, the Company evaluates the collectability of both interest and principal on its loans to determine whether they are impaired. A loan or pool of loans is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the existing contractual terms. Income recognition is suspended for loans at the earlier of the date at which payments become 90-days past due or when, in the opinion of the Manager, a full recovery of income and principal becomes doubtful. When the ultimate collectability of the principal of an impaired loan or pool of loans is in doubt, all payments are applied to principal under the cost recovery method. When the ultimate collectability of the principal of an impaired loan is not in doubt, contractual interest is recorded as interest income when received, under the cash basis method until an accrual is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. A loan is written off when it is no longer realizable and/or legally discharged. When the Company purchases mortgage loans with evidence of credit deterioration since origination and it determines that it is probable it will not collect all contractual cash flows on those loans, it will apply the guidance found in ASC 310-30. Mortgage loans that are delinquent 60 or more days are considered non-performing. The Company updates its estimate of the cash flows expected to be collected on at least a quarterly basis for loans accounted for under ASC 310-30. In estimating these cash flows, there are a number of assumptions that will be subject to uncertainties and contingencies including both the rate and timing of principal and interest receipts, and assumptions of prepayments, repurchases, defaults and liquidations. If based on the most current information and events it is probable that there is a significant increase in cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, the Company will recognize these changes prospectively through an adjustment of the loan’s yield over its remaining life. The Company will adjust the amount of accretable yield by reclassification from the nonaccretable difference. The adjustment is accounted for as a change in estimate in conformity with ASC 250, "Accounting Changes and Error Corrections" with the amount of periodic accretion adjusted over the remaining life of the loan. Prior to the adoption of ASU 2016-13, decreases in cash flows expected to be collected from previously projected cash flows, which included all cash flows originally expected to be collected by the investor plus any additional cash flows expected to be collected arising from changes in estimate after acquisition, could have been recognized as impairment. Increases in interest income could have been recognized on a loan on which the Company previously recorded an OTTI charge if the performance of such loan subsequently improved.
Investments in debt and equity of affiliates	Investments in debt and equity of affiliates The Company’s unconsolidated ownership interests in affiliates are accounted for using the equity method. A majority of the Company’s investments held through affiliated entities are comprised of real estate securities, Excess MSRs, loans, and certain derivatives. These types of investments may also be held directly by the Company. These entities have chosen to make a fair value election on their financial instruments and certain financing arrangements pursuant to ASC 825; as such, the Company will treat these financial instruments and financing arrangements consistently with this election. On December 9, 2015, the Company, alongside private funds managed by Angelo Gordon, through AG Arc LLC, one of the Company’s indirect subsidiaries ("AG Arc"), formed Arc Home LLC ("Arc Home"). In June 2016, Arc Home closed on the acquisition of a Fannie Mae, Freddie Mac, FHA, VA and Ginnie Mae seller/servicer of residential mortgages. Through this subsidiary, Arc Home originates conforming, Government, Jumbo, Non-QM, and other non-conforming residential mortgage loans, retains the mortgage servicing rights associated with the loans it originates, and purchases additional mortgage servicing rights from third-party sellers. The Company has chosen to make a fair value election with respect to its investment in AG Arc pursuant to ASC 825. On August 29, 2017, the Company, alongside private funds managed by Angelo Gordon, formed Mortgage Acquisition Holding I LLC ("MATH") to conduct a residential mortgage investment strategy. MATH in turn sponsored the formation of an entity called Mortgage Acquisition Trust I LLC ("MATT") to purchase predominantly "Non-QM" loans, which are residential mortgage loans that are not deemed "qualified mortgage," or "QM," loans under the rules of the Consumer Finance Protection Bureau. Non-QM loans are not eligible for delivery to Fannie Mae, Freddie Mac, or Ginnie Mae. MATT has made an election to be treated as a real estate investment trust beginning with the 2018 tax year. On April 3, 2020, the Company, alongside private funds under the management of Angelo Gordon, restructured its financing arrangements in MATT ("Restructured Financing Arrangement"). The Restructured Financing Arrangement requires all principal and interest on the underlying assets in MATT be used to pay down principal and interest on the outstanding financing arrangement. As of April 3, 2020, the Restructured Financing Arrangement is no longer a mark-to-market facility with respect to margin calls and is non-recourse to the Company. The Restructured Financing Arrangement provides for a termination date of October 1, 2021. At the earlier of the termination date or the securitization or sale by the Company of the remaining assets subject to the Restructured Financing Arrangement, the financing counterparty (which is a non-affiliate) will be entitled to 35% of the remaining equity in the assets. The Company evaluated this restructuring and concluded it was an extinguishment of debt. MATT has chosen to make a fair value election on this financing arrangement, and the Company will treat this arrangement consistently with this election. On May 15, 2019 and November 14, 2019, the Company, alongside private funds managed by Angelo Gordon, formed LOT SP I LLC and LOT SP II LLC, respectively, (collectively, "LOTS"). LOTS were formed to originate first mortgage loans to third party land developers and home builders for the acquisition and horizontal development of land ("Land Related Financing"). The below table reconciles the fair value of investments to the "Investments in debt and equity of affiliates" line item on the Company's consolidated balance sheet (in thousands). September 30, 2020 December 31, 2019 Assets Liabilities Equity Assets Liabilities Equity Real Estate Securities, Excess MSRs and Loans, at fair value (1)(2) $ 217,643 $ (123,861) $ 93,782 $ 373,126 $ (257,068) $ 116,058 AG Arc, at fair value 41,436 — 41,436 28,546 — 28,546 Cash and Other assets/(liabilities) 4,925 (1,454) 3,471 12,953 (1,246) 11,707 Investments in debt and equity of affiliates $ 264,004 $ (125,315) $ 138,689 $ 414,625 $ (258,314) $ 156,311 (1) Certain loans held in securitized form are presented net of non-recourse securitized debt. (2) Within Real Estate Securities, Excess MSRs and Loans is $152.5 million and $254.3 million of fair value of Non-QM loans held in MATT at September 30, 2020 and December 31, 2019, respectively. The related financing on the Non-QM loans was $117.0 million and $200.3 million at September 30, 2020 and December 31, 2019, respectively. As of September 30, 2020, Non-QM Loans excluded loans with an unpaid principal balance of $24.5 million whereby an affiliate of MATT has the right, but not the obligation, to repurchase loans from a trust that are 90 days or more delinquent at its discretion. These loans, which are eligible to be repurchased, would be recorded on the balance sheet of MATT, an unconsolidated equity method investee of the Company, with a corresponding and offsetting liability. Additionally, there is $25.5 million and $17.0 million of fair value of Land Related Financing held in LOTS at September 30, 2020 and December 31, 2019, respectively. The Company’s investments in debt and equity of affiliates are recorded at fair value on the consolidated balance sheets in the "Investments in debt and equity of affiliates" line item and periodic changes in fair value are recorded in current period earnings on the consolidated statement of operations as a component of "Equity in earnings/(loss) from affiliates." Capital contributions, distributions and profits and losses of such entities are allocated in accordance with the terms of the applicable agreements.
Accounting for excess mortgage servicing rights	Accounting for excess mortgage servicing rights The Company has acquired the right to receive the excess servicing spread related to Excess MSRs. The Company has chosen to make a fair value election pursuant to ASC 825 for Excess MSRs. Excess MSRs are recorded at fair value on the consolidated balance sheets and any periodic change in fair value is recorded in current period earnings on the consolidated statement of operations as a component of "Unrealized gain/(loss) on derivative and other instruments, net." The Company amortizes or accretes any premium or discount over the life of the related Excess MSRs utilizing the effective interest method. On at least a quarterly basis, the Company evaluates the collectability of interest of its Excess MSRs to determine whether they are impaired. The Company updates its estimate of the cash flows expected to be collected on at least a quarterly basis for Excess MSRs. In estimating these cash flows, there are a number of assumptions that will be subject to uncertainties and contingencies including both the rate and timing of interest receipts, and assumptions of prepayments, repurchases, defaults and liquidations. If there is a significant increase in expected cash flows over what was previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, the Company will recognize these changes prospectively through an adjustment of the Excess MSR’s yield over its remaining life. Prior to the adoption of ASU 2016-13, decreases in cash flows expected to be collected from previously projected cash flows, which included all cash flows originally expected to be collected by the investor plus any additional cash flows expected to be collected arising from changes in estimate after acquisition, could have been recognized as impairment. Increases in interest income could have been recognized on an Excess MSR on which the Company previously recorded an OTTI charge if the performance of such Excess MSR subsequently improved.
Investment consolidation and transfers of financial assets	Investment consolidation and transfers of financial assets For each investment made, the Company evaluates the underlying entity that issued the securities acquired or to which the Company makes a loan to determine the appropriate accounting. A similar analysis is performed for each entity with which the Company enters into an agreement for management, servicing or related services. In performing the analysis, the Company refers to guidance in ASC 810-10, "Consolidation." In situations where the Company is the transferor of financial assets, the Company refers to the guidance in ASC 860-10 "Transfers and Servicing." In variable interest entities ("VIEs"), an entity is subject to consolidation under ASC 810-10 if the equity investors either do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support, are unable to direct the entity’s activities or are not exposed to the entity’s losses or entitled to its residual returns. VIEs within the scope of ASC 810-10 are required to be consolidated by their primary beneficiary. The primary beneficiary of a VIE is determined to be the party that has both the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. This determination can sometimes involve complex and subjective analyses. Further, ASC 810-10 also requires ongoing assessments of whether an enterprise is the primary beneficiary of a VIE. In accordance with ASC 810-10, all transferees, including variable interest entities, must be evaluated for consolidation. If the Company determines that consolidation is not required, it will then assess whether the transfer of the underlying assets would qualify as a sale, should be accounted for as secured financings under GAAP, or should be accounted for as an equity method investment, depending on the circumstances. See Note 3 and Note 4 for more detail. 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 resecuritizing previously securitized financial assets. The objective of such transactions may include obtaining non-recourse financing, obtaining liquidity or refinancing the underlying securitized financial assets on improved terms. Securitization involves transferring assets to an 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 an 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 entered into a resecuritization transaction in 2014 (the "December 2014 VIE") which resulted in the Company consolidating the VIE that was created to facilitate the transaction and to which the underlying assets in connection with the resecuritization were transferred. The transferred assets were recorded as a secured borrowing. The Company has chosen to make a fair value election pursuant to ASC 825 for its secured borrowings. As of September 30, 2020, the Company did not hold any interest in the December 2014 VIE. In connection with the deconsolidation, the Company recorded a realized gain of $2.1 million. See Note 3 below for more detail. The Company transferred certain of its CMBS in Q3 2018 from certain of its non-wholly owned subsidiaries into a newly formed wholly owned entity so the Company could obtain financing on these real estate securities (the "August 2018 VIE"). The Company determined that the August 2018 VIE should be consolidated. As of September 30, 2020, the Company did not hold any interest in the August 2018 VIE. In connection with the deconsolidation, the Company recorded a loss of $8.3 million. See Note 3 below as well as the "Investments in debt and equity of affiliates" section above for more detail. The Company entered into securitization transactions of certain of its re-performing residential mortgage loans, which resulted in the Company consolidating the respective VIEs that were created to facilitate these transactions and to which the underlying assets in connection with these securitizations were transferred (the "August 2019 VIE" and the "September 2020 VIE"). Based on the evaluations of each VIE, the Company concluded that the VIEs should be consolidated and, as a result, transferred assets of these VIEs were determined to be secured borrowings. Upon consolidation, the Company elected the fair value option pursuant to ASC 825 for the assets and liabilities of the August 2019 VIE and September 2020 VIE. Electing the fair value option allows the Company to record changes in fair value in the Consolidated Statement of Operations, which, in management's view, more appropriately reflects the results of operations for a particular reporting period as all activities will be recorded in a similar manner. See Note 4 for more detail regarding these VIEs. Refer to Note 6 related to the Company's determination of fair value for the assets and liabilities included within these VIEs. From time to time the Company purchases residual positions where it consolidates the securitization and the positions are recorded on the Company's books as residential mortgage loans. There may be limited data available regarding the underlying collateral of such securitizations. The Company may periodically enter into transactions in which it transfers assets to a third party. Upon a transfer of financial assets, the Company will sometimes retain or acquire senior or subordinated interests in the related assets. Pursuant to ASC 860-10, a determination must be made as to whether a transferor has surrendered control over transferred financial assets. That determination must consider the transferor’s continuing involvement in the transferred financial asset, including all arrangements or agreements made contemporaneously with, or in contemplation of, the transfer, even if they were not entered into at the time of the transfer. The financial components approach under ASC 860-10 limits the circumstances in which a financial asset, or portion of a financial asset, should be derecognized when the transferor has not transferred the entire original financial asset to an entity that is not consolidated with the transferor in the financial statements being presented and/or when the transferor has continuing involvement with the transferred financial asset. It defines the term "participating interest" to establish specific conditions for reporting a transfer of a portion of a financial asset as a sale. Under ASC 860-10, after a transfer of financial assets that meets the criteria for treatment as a sale—legal isolation, ability of transferee to pledge or exchange the transferred assets without constraint and transferred control—an entity recognizes the financial and servicing assets it acquired or retained and the liabilities it has incurred, derecognizes financial assets it has sold and derecognizes liabilities when extinguished. The transferor would then determine the gain or loss on sale of financial assets by allocating the carrying value of the underlying mortgage between securities or loans sold and the interests retained based on their fair values. The gain or loss on sale is the difference between the cash proceeds from the sale and the amount allocated to the securities or loans sold. When a transfer of financial assets does not qualify for sale accounting, ASC 860-10 requires the transfer to be accounted for as a secured borrowing with a pledge of collateral. From time to time, the Company may securitize mortgage loans it holds if such financing is available. These transactions will be recorded in accordance with ASC 860-10 and will be accounted for as either a "sale" and the loans will be removed from the
Interest income recognition	Interest income recognition Interest income on the Company’s real estate securities portfolio is accrued based on the actual coupon rate and the outstanding principal balance of such securities. The Company has elected to record interest in accordance with ASC 835-30-35-2, "Imputation of Interest," using the effective interest method for all securities accounted for under the fair value option (ASC 825). As such, premiums and discounts are amortized or accreted into interest income over the lives of the securities in accordance with ASC 310-20, "Nonrefundable Fees and Other Costs," ASC 320-10 or ASC 325-40, as applicable. Total interest income is recorded in the "Interest income" line item on the consolidated statement of operations. On at least a quarterly basis for securities accounted for under ASC 320-10 and ASC 310-20 (generally Agency RMBS, exclusive of interest-only securities), prepayments of the underlying collateral must be estimated, which directly affect the speed at which the Company amortizes premiums on its securities. If actual and anticipated cash flows differ from previous estimates, the Company records an adjustment in the current period to the amortization of premiums for the impact of the cumulative change in the effective yield retrospectively through the reporting date. Similarly, the Company also reassesses the cash flows on at least a quarterly basis for securities accounted for under ASC 325-40 (generally Non-Agency RMBS, ABS, CMBS, interest-only securities and Excess MSRs). In estimating these cash flows, there are a number of assumptions made that are uncertain and subject to judgments and assumptions based on subjective and objective factors and contingencies. These include the rate and timing of principal and interest receipts (including assumptions of prepayments, repurchases, defaults and liquidations), the pass-through or coupon rate and interest rate fluctuations. In addition, interest payment shortfalls due to delinquencies on the underlying mortgage loans have to be estimated. Differences between previously estimated cash flows and current actual and anticipated cash flows are recognized prospectively through an adjustment of the yield over the remaining life of the security based on the current amortized cost of the investment as adjusted for credit impairment, if any. Interest income on the Company’s loan portfolio is accrued based on the actual coupon rate and the outstanding principal balance of such loans. The Company has elected to record interest in accordance with ASC 835-30-35-2 using the effective interest method for all loans accounted for under the fair value option (ASC 825). Any amortization or accretion is reflected as an adjustment to interest income in the consolidated statement of operations.
Financing arrangements	Financing arrangements The Company finances the acquisition of certain assets within its portfolio through the use of financing arrangements. Financing arrangements include repurchase agreements and financing facilities. The Company's financing facilities include revolving facilities. Repurchase agreements and financing facilities are treated as collateralized financing transactions and carried at their contractual amounts, including accrued interest, as specified in the respective agreements. The carrying amount of the Company’s repurchase agreements and revolving facilities approximates fair value. The Company pledges certain securities, loans or properties as collateral under financing arrangements with financial institutions, the terms and conditions of which are negotiated on a transaction-by-transaction basis. The amounts available to be
Recent accounting pronouncements	Recent accounting pronouncementsIn June 2016, FASB issued ASU 2016-13, "Financial Instruments – Credit Losses" ("ASU 2016-13"). This new guidance significantly changes how entities will measure credit losses for most financial assets, including loans, that are not measured at fair value with changes in fair value recognized through net income. The guidance replaces the existing “incurred loss” model with an “expected loss” model for instruments measured at amortized cost. It requires entities to record credit allowances for available-for-sale debt securities rather than reduce the carrying amount, as it currently is under the other-than temporary impairment model. The new guidance also simplifies the accounting model for purchased credit-impaired debt securities and loans. The Company adopted the new guidance as of January 1, 2020. The new guidance specifically excludes available-for-sale securities and loans measured at fair value with changes in fair value recognized through net income. Accordingly, the impact of the new guidance on accounting for the Company's debt securities and loans is limited to recognition of effective yield which was historically impacted by other than temporary impairment recorded under previously existing standards. As the new guidance eliminates the accounting for other than temporary impairment, this guidance had an impact on the Company's unrealized and realized gain/(loss) amounts.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Schedule of investments in debt and equity of affiliates	The below table reconciles the fair value of investments to the "Investments in debt and equity of affiliates" line item on the Company's consolidated balance sheet (in thousands). September 30, 2020 December 31, 2019 Assets Liabilities Equity Assets Liabilities Equity Real Estate Securities, Excess MSRs and Loans, at fair value (1)(2) $ 217,643 $ (123,861) $ 93,782 $ 373,126 $ (257,068) $ 116,058 AG Arc, at fair value 41,436 — 41,436 28,546 — 28,546 Cash and Other assets/(liabilities) 4,925 (1,454) 3,471 12,953 (1,246) 11,707 Investments in debt and equity of affiliates $ 264,004 $ (125,315) $ 138,689 $ 414,625 $ (258,314) $ 156,311 (1) Certain loans held in securitized form are presented net of non-recourse securitized debt. (2) Within Real Estate Securities, Excess MSRs and Loans is $152.5 million and $254.3 million of fair value of Non-QM loans held in MATT at September 30, 2020 and December 31, 2019, respectively. The related financing on the Non-QM loans was $117.0 million and $200.3 million at September 30, 2020 and December 31, 2019, respectively. As of September 30, 2020, Non-QM Loans excluded loans with an unpaid principal balance of $24.5 million whereby an affiliate of MATT has the right, but not the obligation, to repurchase loans from a trust that are 90 days or more delinquent at its discretion. These loans, which are eligible to be repurchased, would be recorded on the balance sheet of MATT, an unconsolidated equity method investee of the Company, with a corresponding and offsetting liability. Additionally, there is $25.5 million and $17.0 million of fair value of Land Related Financing held in LOTS at September 30, 2020 and December 31, 2019, respectively.

Real Estate Securities (Tables)

Real Estate Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of real estate securities portfolio	September 30, 2020 Gross Unrealized Weighted Average Current Face Premium / (Discount) Amortized Cost Gains Losses Fair Value Coupon (1) Yield Agency RMBS: 30 Year Fixed Rate $ 237,142 $ 12,760 $ 249,902 $ 258 $ (37) $ 250,123 2.21 % 1.17 % Credit Investments: Residential Investments Prime 14,104 (6,356) 7,748 660 (46) 8,362 3.69 % 7.64 % Alt-A/Subprime 16,471 (9,676) 6,795 2,951 — 9,746 4.25 % 5.25 % Credit Risk Transfer 15,523 — 15,523 — (3,489) 12,034 4.70 % 4.60 % Non-U.S. RMBS 2,869 811 3,680 40 (276) 3,444 6.16 % 6.08 % Non-Agency RMBS Interest Only 171,444 (171,365) 79 281 (48) 312 0.55 % 14.42 % Re/Non-Performing Securities 2,758 (539) 2,219 128 (33) 2,314 5.25 % 9.99 % Land Related Financing 6,989 (176) 6,813 246 — 7,059 7.75 % 8.33 % Total Residential Investments: 230,158 (187,301) 42,857 4,306 (3,892) 43,271 2.34 % 6.42 % Commercial Investments Conduit 4,925 (1,081) 3,844 — (781) 3,063 4.78 % 11.88 % Single-Asset/Single-Borrower 50,480 (1,543) 48,937 829 (11,588) 38,178 4.17 % 4.84 % Freddie Mac K-Series CMBS 22,572 (12,221) 10,351 48 (1,763) 8,636 3.84 % 8.98 % CMBS Interest Only (2) 687,293 (683,075) 4,218 205 (72) 4,351 0.10 % 7.51 % Total Commercial Investments: 765,270 (697,920) 67,350 1,082 (14,204) 54,228 0.44 % 6.11 % Total Credit Investments: 995,428 (885,221) 110,207 5,388 (18,096) 97,499 0.72 % 6.25 % Total $ 1,232,570 $ (872,461) $ 360,109 $ 5,646 $ (18,133) $ 347,622 1.04 % 2.60 % (1) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. (2) Comprised of Freddie Mac K-Series interest-only bonds. December 31, 2019 Gross Unrealized Weighted Average Current Face Premium / (Discount) Amortized Cost Gains Losses Fair Value Coupon (1) Yield Agency RMBS: 30 Year Fixed Rate $ 2,125,067 $ 59,123 $ 2,184,190 $ 57,404 $ (296) $ 2,241,298 3.73 % 3.17 % Interest Only 476,192 (403,248) 72,944 2,330 (1,133) 74,141 3.93 % 5.87 % Total Agency RMBS: 2,601,259 (344,125) 2,257,134 59,734 (1,429) 2,315,439 3.77 % 3.26 % Credit Investments: Residential Investments Prime 297,932 (84,876) 213,056 29,052 (221) 241,887 4.92 % 7.44 % Alt-A/Subprime 141,464 (30,859) 110,605 12,234 (127) 122,712 4.40 % 6.89 % Credit Risk Transfer 270,397 591 270,988 8,972 (5) 279,955 5.17 % 5.27 % Non-U.S. RMBS 44,867 9,473 54,340 3,391 — 57,731 3.21 % 3.58 % Non-Agency RMBS Interest Only 209,362 (207,948) 1,414 — (340) 1,074 0.77 % 5.96 % Re/Non-Performing Securities 5,966 (1,965) 4,001 1,180 — 5,181 5.18 % 19.20 % Land Related Financing 8,628 (212) 8,416 514 — 8,930 7.75 % 8.26 % Total Residential Investments: 978,616 (315,796) 662,820 55,343 (693) 717,470 4.40 % 6.28 % Commercial Investments Conduit 72,318 (9,181) 63,137 811 (602) 63,346 4.24 % 5.57 % Single-Asset/Single-Borrower 204,702 (5,606) 199,096 879 (304) 199,671 5.09 % 5.57 % Freddie Mac K-Series CMBS 208,693 (119,809) 88,884 17,030 — 105,914 5.70 % 11.54 % CMBS Interest Only (2) 3,427,025 (3,382,273) 44,752 3,486 (246) 47,992 0.24 % 6.68 % Total Commercial Investments: 3,912,738 (3,516,869) 395,869 22,206 (1,152) 416,923 0.60 % 7.21 % Total Credit Investments: 4,891,354 (3,832,665) 1,058,689 77,549 (1,845) 1,134,393 1.31 % 6.62 % Total $ 7,492,613 $ (4,176,790) $ 3,315,823 $ 137,283 $ (3,274) $ 3,449,832 2.20 % 4.37 % (1) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. (2) Comprised of Freddie Mac K-Series interest-only bonds.
Schedule of weighted average life of real estate securities	The following tables detail the weighted average life of our real estate securities as of September 30, 2020 and December 31, 2019 ($ in thousands): September 30, 2020 Agency RMBS Credit Investments Weighted Average Life (1) Fair Value Amortized Cost Weighted Average Coupon Fair Value Amortized Cost Weighted Average Coupon (2) Less than or equal to 1 year $ — $ — — % $ 16,576 $ 21,741 1.33 % Greater than one year and less than or equal to five years 98,388 98,372 2.43 % 25,931 32,723 0.45 % Greater than five years and less than or equal to ten years 151,735 151,530 2.08 % 17,945 18,740 0.38 % Greater than ten years — — — 37,047 37,003 4.31 % Total $ 250,123 $ 249,902 2.21 % $ 97,499 $ 110,207 0.72 % (1) This is based on projected life. Typically, actual maturities of mortgage-backed securities are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation. December 31, 2019 Agency RMBS Credit Investments Weighted Average Life (1) Fair Value Amortized Cost Weighted Average Coupon Fair Value Amortized Cost Weighted Average Coupon (2) Less than or equal to 1 year $ — $ — — % $ 82,474 $ 82,273 0.56 % Greater than one year and less than or equal to five years 313,855 302,520 4.01 % 525,192 508,038 1.29 % Greater than five years and less than or equal to ten years 2,001,584 1,954,614 3.71 % 296,665 263,300 1.06 % Greater than ten years — — — 230,062 205,078 5.46 % Total $ 2,315,439 $ 2,257,134 3.77 % $ 1,134,393 $ 1,058,689 1.31 % (1) This is based on projected life. Typically, actual maturities of mortgage-backed securities are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) Equity residual investments and principal only securities with a zero coupon rate are excluded from this calculation.
Schedule of Company's consolidated VIE	The following table details certain information related to the December 2014 VIE and August 2018 VIE as further described in Note 2 as of December 31, 2019 (in thousands). As of September 30, 2020, the Company did not hold any interest in these VIEs. December 31, 2019 Assets Real estate securities, at fair value: Non-Agency $ 13,838 CMBS 94,500 Other assets 808 Total assets $ 109,146 Liabilities Financing arrangements $ 70,712 Securitized debt, at fair value 7,230 Other liabilities 3,553 Total liabilities $ 81,495 The following table details certain information related to the December 2014 VIE as of December 31, 2019 ($ in thousands): Weighted Average Current Face Fair Value Coupon Yield Life (Years) (1) Consolidated tranche (2) $ 7,204 $ 7,230 3.46 % 4.11 % 1.96 Retained tranche 7,851 6,608 5.37 % 18.14 % 7.64 Total resecuritized asset (3) $ 15,055 $ 13,838 4.46 % 10.81 % 4.92 (1) This is based on projected life. Typically, actual maturities of investments and loans are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) As of December 31, 2019, the Company has recorded secured financing of $7.2 million on the consolidated balance sheets in the "Securitized debt, at fair value" line item. The Company recorded the proceeds from the issuance of the secured financing in the "Cash Flows from Financing Activities" section of the consolidated statement of cash flows at the time of securitization. (3) As of December 31, 2019, the fair market value of the total resecuritized asset is included in the Company’s consolidated balance sheets as "Non-Agency." The following table details certain information related to the assets and liabilities of the August 2019 VIE and September 2020 VIE as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Assets Residential mortgage loans, at fair value $ 420,200 $ 255,171 Restricted cash 1,976 — Other assets 2,596 898 Total assets $ 424,772 $ 256,069 Liabilities Financing arrangements $ 23,918 $ 24,584 Securitized debt, at fair value 358,986 217,118 Other liabilities 546 596 Total liabilities $ 383,450 $ 242,298 The following table details additional information regarding loans and securitized debt related to the August 2019 VIE and September 2020 VIE as of September 30, 2020 and December 31, 2019 ($ in thousands): Weighted Average As of: Current Unpaid Principal Balance Fair Value Coupon Yield Life (Years) (1) September 30, 2020 August 2019 VIE Residential mortgage loans $ 248,023 $ 220,590 3.71 % 4.80 % 6.97 Securitized debt (2) 206,434 195,499 2.96 % 2.97 % 5.13 September 2020 VIE Residential mortgage loans 249,071 199,610 3.58 % 5.46 % 6.72 Securitized debt (2) 163,487 163,487 2.98 % 3.00 % 2.09 December 31, 2019 August 2019 VIE Residential mortgage loans 263,956 255,171 3.96 % 5.11 % 7.66 Securitized debt (2) 217,455 217,118 2.92 % 2.86 % 5.00 (1) This is based on projected life. Typically, actual maturities of investments and loans are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) As of September 30, 2020 and December 31, 2019, the Company has recorded secured financing of $359.0 million and $217.1 million, respectively, on the consolidated balance sheets in the "Securitized debt, at fair value" line item. The Company recorded the proceeds from the issuance of the secured financing in the "Cash Flows from Financing Activities" section of the consolidated statement of cash flows at the time of securitization.

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Schedule of company's residential mortgage loan portfolio and commercial loan portfolio	The table below details information regarding the Company’s residential mortgage loan portfolio as of September 30, 2020 and December 31, 2019 ($ in thousands): Gross Unrealized Weighted Average As of Unpaid Principal Balance Premium Amortized Cost Gains Losses Fair Value Coupon Yield Life September 30, 2020 $ 518,510 $ (72,943) $ 445,567 $ 3,786 $ (19,705) $ 429,648 3.64 % 5.17 % 6.76 December 31, 2019 464,041 (55,219) 408,822 9,065 (102) 417,785 4.09 % 5.72 % 7.36 (1) This is based on projected life. Typically, actual maturities of residential mortgage loans are shorter than stated contractual maturities. Maturities are affected by the lives of the underlying mortgages, periodic payments of principal and prepayments of principal. The following tables present detail on the Company’s commercial loan portfolio as of September 30, 2020 and December 31, 2019 ($ in thousands). September 30, 2020 Weighted Average Loan Current Face Premium (Discount) Amortized Cost Gross Unrealized Losses Fair Value (3) Coupon Yield (5) Life Extended Location Collateral Type Loan G (8)(9) $ 56,697 $ — $ 56,697 $ (3,941) $ 52,756 5.27 % 5.27 % 1.80 July 9, 2022 CA Condo, Retail, Hotel Loan I (10)(11) 15,211 (173) 15,038 (826) 14,212 11.50 % 12.00 % 2.47 February 9, 2023 MN Office, Retail Loan K (12) 14,173 — 14,173 (1,100) 13,073 10.00 % 11.00 % 1.27 February 22, 2024 NY Hotel, Retail Loan L (12)(13) 51,000 (338) 50,662 (7,823) 42,839 5.40 % 5.67 % 3.86 July 22, 2024 IL Hotel, Retail $ 137,081 $ (511) $ 136,570 $ (13,690) $ 122,880 6.50 % 6.80 % 2.59 (1) The Company has the contractual right to receive a balloon payment for each loan. (2) Refer to Note 13 "Commitments and Contingencies" for details on the Company's commitments on its Commercial Loans as of September 30, 2020. (3) Pricing is reflective of marks on unfunded commitments. (4) Each commercial loan investment has a variable coupon rate. (5) Yield includes any exit fees. (6) Actual maturities of commercial mortgage loans may be shorter or longer than stated contractual maturities. Maturities are affected by prepayments of principal. (7) Represents the maturity date of the last possible extension option. (8) Loan G is a first mortgage loan. (9) Loan G has been amended and has been extended to its extended maturity date upon reaching its initial maturity of July 9, 2020. See Note 13 for more details regarding commitments. (10) Loan I is a mezzanine loan. (11) Subsequent to quarter end, the Company and the borrower of Loan I entered into a modification agreement to, among other things, extend the term of the Loan, allow for a portion of the interest to be deferred and increase the capital commitment amount by $6.0 million. See Note 13 for more details regarding commitments. (12) Loan K and Loan L are comprised of first mortgage and mezzanine loans. (13) Subsequent to quarter end, the Company and the borrower of Loan L entered into a modification agreement to, among other things, require the borrower to pay previously deferred interest in full, defer interest for the following 12-month period and require funding of capital reserves by the borrower. December 31, 2019 Weighted Average Loan (1) Current Face Premium Amortized Cost Gross Fair Value Coupon Yield (3) Life Extended Location Collateral Type Loan G (6) $ 45,856 $ — $ 45,856 $ — $ 45,856 6.46 % 6.46 % 0.53 July 9, 2022 CA Condo, Retail, Hotel Loan H (6) 36,000 — 36,000 — 36,000 5.49 % 5.49 % 0.19 June 9, 2020 AZ Office Loan I (7) 11,992 (184) 11,808 184 11,992 12.21 % 14.51 % 1.04 February 9, 2023 MN Office, Retail Loan J (6) 4,674 — 4,674 — 4,674 6.36 % 6.36 % 2.12 January 1, 2024 NY Hotel, Retail Loan K (8) 9,164 — 9,164 — 9,164 10.71 % 11.86 % 1.72 February 22, 2024 NY Hotel, Retail Loan L (8) 51,000 (502) 50,498 502 51,000 6.16 % 6.50 % 4.63 July 22, 2024 IL Hotel, Retail $ 158,686 $ (686) $ 158,000 $ 686 $ 158,686 6.82 % 7.17 % 1.92 (1) The Company has the contractual right to receive a balloon payment for each loan. (2) Each commercial loan investment has a variable coupon rate. (3) Yield includes any exit fees. (4) Actual maturities of commercial mortgage loans may be shorter or longer than stated contractual maturities. Maturities are affected by prepayments of principal. (5) Represents the maturity date of the last possible extension option. (6) Loan G, Loan H, and Loan J are first mortgage loans. (7) Loan I is a mezzanine loan. (8) Loan K and Loan L are comprised of first mortgage and mezzanine loans.
Schedule of company's re-performing and non-performing residential mortgage loans	The table below details information regarding the Company’s residential mortgage loans as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Fair Value Unpaid Principal Balance Fair Value Unpaid Principal Balance Re-Performing $ 306,845 $ 359,230 $ 330,234 $ 357,678 Non-Performing 113,461 138,422 87,551 106,363 Other (1) 9,342 20,858 — — $ 429,648 $ 518,510 $ 417,785 $ 464,041 (1) Represents residual positions where the Company consolidates a securitization and the positions are recorded on the Company's books as residential mortgage loans. There may be limited data available regarding the underlying collateral of such securitizations.
Schedule of certain concentrations of credit risk within the company's mortgage loan portfolio	The following is a summary of the geographic concentration of credit risk within the Company’s mortgage loan portfolio as of September 30, 2020 and December 31, 2019, excluding any loans classified as Other above: Geographic Concentration of Credit Risk September 30, 2020 December 31, 2019 Percentage of fair value of mortgage loans secured by properties in the following states representing 5% or more of fair value: California 17 % 19 % Florida 11 % 11 % New York 10 % 9 % New Jersey 6 % 6 %
Schedule of changes in the accretable portion of discounts	The following is a summary of the changes in the accretable portion of discounts for the three and nine months ended September 30, 2020 and September 30, 2019, respectively (in thousands): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 Beginning Balance $ 138,161 $ 89,515 $ 168,877 $ 79,610 Additions 31,115 70,279 160,132 90,515 Accretion (5,073) (4,286) (21,538) (10,987) Reclassifications from/(to) non-accretable difference (1,064) (1,089) (25,741) 515 Disposals (2,298) (53) (120,889) (5,287) Ending Balance $ 160,841 $ 154,366 $ 160,841 $ 154,366
Schedule of certain information related to August 2019 VIE	The following table details certain information related to the December 2014 VIE and August 2018 VIE as further described in Note 2 as of December 31, 2019 (in thousands). As of September 30, 2020, the Company did not hold any interest in these VIEs. December 31, 2019 Assets Real estate securities, at fair value: Non-Agency $ 13,838 CMBS 94,500 Other assets 808 Total assets $ 109,146 Liabilities Financing arrangements $ 70,712 Securitized debt, at fair value 7,230 Other liabilities 3,553 Total liabilities $ 81,495 The following table details certain information related to the December 2014 VIE as of December 31, 2019 ($ in thousands): Weighted Average Current Face Fair Value Coupon Yield Life (Years) (1) Consolidated tranche (2) $ 7,204 $ 7,230 3.46 % 4.11 % 1.96 Retained tranche 7,851 6,608 5.37 % 18.14 % 7.64 Total resecuritized asset (3) $ 15,055 $ 13,838 4.46 % 10.81 % 4.92 (1) This is based on projected life. Typically, actual maturities of investments and loans are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) As of December 31, 2019, the Company has recorded secured financing of $7.2 million on the consolidated balance sheets in the "Securitized debt, at fair value" line item. The Company recorded the proceeds from the issuance of the secured financing in the "Cash Flows from Financing Activities" section of the consolidated statement of cash flows at the time of securitization. (3) As of December 31, 2019, the fair market value of the total resecuritized asset is included in the Company’s consolidated balance sheets as "Non-Agency." The following table details certain information related to the assets and liabilities of the August 2019 VIE and September 2020 VIE as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Assets Residential mortgage loans, at fair value $ 420,200 $ 255,171 Restricted cash 1,976 — Other assets 2,596 898 Total assets $ 424,772 $ 256,069 Liabilities Financing arrangements $ 23,918 $ 24,584 Securitized debt, at fair value 358,986 217,118 Other liabilities 546 596 Total liabilities $ 383,450 $ 242,298 The following table details additional information regarding loans and securitized debt related to the August 2019 VIE and September 2020 VIE as of September 30, 2020 and December 31, 2019 ($ in thousands): Weighted Average As of: Current Unpaid Principal Balance Fair Value Coupon Yield Life (Years) (1) September 30, 2020 August 2019 VIE Residential mortgage loans $ 248,023 $ 220,590 3.71 % 4.80 % 6.97 Securitized debt (2) 206,434 195,499 2.96 % 2.97 % 5.13 September 2020 VIE Residential mortgage loans 249,071 199,610 3.58 % 5.46 % 6.72 Securitized debt (2) 163,487 163,487 2.98 % 3.00 % 2.09 December 31, 2019 August 2019 VIE Residential mortgage loans 263,956 255,171 3.96 % 5.11 % 7.66 Securitized debt (2) 217,455 217,118 2.92 % 2.86 % 5.00 (1) This is based on projected life. Typically, actual maturities of investments and loans are shorter than stated contractual maturities. Maturities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. (2) As of September 30, 2020 and December 31, 2019, the Company has recorded secured financing of $359.0 million and $217.1 million, respectively, on the consolidated balance sheets in the "Securitized debt, at fair value" line item. The Company recorded the proceeds from the issuance of the secured financing in the "Cash Flows from Financing Activities" section of the consolidated statement of cash flows at the time of securitization.

Excess MSRs (Tables)

Excess MSRs (Tables)	9 Months Ended
	Sep. 30, 2020
Disclosure of Excess MSRs [Abstract]
Schedule of Excess MSR Portfolio	The following table presents detail on the Company’s Excess MSR portfolio on September 30, 2020 ($ in thousands). Gross Unrealized Weighted Average Unpaid Principal Amortized Losses Fair Value Yield Life Agency Excess MSRs $ 652,756 $ 4,725 $ (1,284) $ 3,441 3.97 % 5.61 Credit Excess MSRs 29,185 172 (87) 85 23.56 % 7.27 Total Excess MSRs $ 681,941 $ 4,897 $ (1,371) $ 3,526 4.44 % 5.68 (1) This is based on projected life. Actual maturities of Excess MSRs may be shorter than stated contractual maturities. Maturities are affected by prepayments of principal. The following table presents detail on the Company’s Excess MSR portfolio on December 31, 2019 ($ in thousands). Gross Unrealized Weighted Average Unpaid Principal Amortized Gains Losses Fair Value Yield Life Agency Excess MSRs $ 2,910,735 $ 19,570 $ 93 $ (2,031) $ 17,632 8.32 % 5.58 Credit Excess MSRs 34,753 178 2 (37) 143 21.38 % 5.25 Total Excess MSRs $ 2,945,488 $ 19,748 $ 95 $ (2,068) $ 17,775 8.42 % 5.58 (1) This is based on projected life. Actual maturities of Excess MSRs may be shorter than stated contractual maturities. Maturities are affected by prepayments of principal.

Fair value measurements (Tables

Fair value measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of financial instruments measured at fair value	The following table presents the Company’s financial instruments measured at fair value on a recurring basis as of September 30, 2020 (in thousands): Fair Value at September 30, 2020 Level 1 Level 2 Level 3 Total Assets: Agency RMBS: 30 Year Fixed Rate $ — $ 250,123 $ — $ 250,123 Credit Investments: Non-Agency RMBS (1) — 39,269 3,690 42,959 Non-Agency RMBS Interest Only — 312 — 312 CMBS (2) — 49,877 — 49,877 CMBS Interest Only — 4,351 — 4,351 Residential mortgage loans — 2,275 427,373 429,648 Commercial loans — — 122,880 122,880 Excess mortgage servicing rights — — 3,526 3,526 AG Arc (3) — — 41,436 41,436 Total Assets Measured at Fair Value $ — $ 346,207 $ 598,905 $ 945,112 Liabilities: Securitized debt $ — $ — $ (358,986) $ (358,986) Derivative liabilities — (39) — (39) Total Liabilities Measured at Fair Value $ — $ (39) $ (358,986) $ (359,025) (1) Non-Agency RMBS is comprised of Prime, Alt-A/Subprime, Non-US RMBS, Re/Non-Performing Securities and Land Related Financing. (2) CMBS is comprised of Conduit, Single-Asset/Single-Borrower and Freddie Mac K-Series CMBS. (3) Refer to Note 2 for more information on the Company's accounting policies with regard to cash equivalents, if applicable, and AG Arc. The table above includes the Company's investment in AG Arc, which is included in its Investments in Debt and Equity of Affiliates line item on the consolidated balance sheets, as the Company has chosen to elect the fair value option with respect to its investment pursuant to ASC 825. The following table presents the Company’s financial instruments measured at fair value on a recurring basis as of December 31, 2019 (in thousands): Fair value at December 31, 2019 Level 1 Level 2 Level 3 Total Assets: Agency RMBS: 30 Year Fixed Rate $ — $ 2,241,298 $ — $ 2,241,298 Interest Only — 74,141 — 74,141 Credit Investments: Non-Agency RMBS (1) — 86,281 630,115 716,396 Non-Agency RMBS Interest Only — — 1,074 1,074 CMBS (2) — 2,365 366,566 368,931 CMBS Interest Only — — 47,992 47,992 Residential mortgage loans — — 417,785 417,785 Commercial loans — — 158,686 158,686 Excess mortgage servicing rights — — 17,775 17,775 Cash equivalents (3) 53,243 — — 53,243 Derivative assets — 2,282 — 2,282 AG Arc (3) — — 28,546 28,546 Total Assets Measured at Fair Value $ 53,243 $ 2,406,367 $ 1,668,539 $ 4,128,149 Liabilities: Securitized debt $ — $ (151,933) $ (72,415) $ (224,348) Derivative liabilities (122) (289) — (411) Total Liabilities Measured at Fair Value $ (122) $ (152,222) $ (72,415) $ (224,759) (1) Non-Agency RMBS is comprised of Prime, Alt-A/Subprime, Non-US RMBS, Re/Non-Performing Securities and Land Related Financing. (2) CMBS is comprised of Conduit, Single-Asset/Single-Borrower and Freddie Mac K-Series CMBS. (3) Refer to Note 2 for more information on the Company's accounting policies with regard to cash equivalents, if applicable, and AG Arc. The table above includes the Company's investment in AG Arc, which is included in its Investments in Debt and Equity of Affiliates line item on the consolidated balance sheets, as the Company has chosen to elect the fair value option with respect to its investment pursuant to ASC 825.
Schedule of assets measured on a recurring basis	The following tables present additional information about the Company’s assets and liabilities which are measured at fair value on a recurring basis for which the Company has utilized Level 3 inputs to determine fair value: Three Months Ended September 30, 2020 (in thousands) Non-Agency RMBS Residential Commercial Loans Excess Mortgage AG Arc Securitized debt Beginning balance $ 4,496 $ 379,822 $ 127,685 $ 12,294 $ 28,030 $ (198,974) Transfers (1): Transfers out of level 3 — (2,225) — — — — Purchases/Transfers — 60,100 8,308 — — — Issuances of Securitized Debt — — — — — (163,487) Proceeds from sales of assets — (6,151) (2,724) (8,460) — — Proceeds from settlement (954) (11,436) (5,710) — — 6,798 Total net gains/(losses) (2) Included in net income 148 7,263 (4,679) (308) 13,406 (3,323) Ending Balance $ 3,690 $ 427,373 $ 122,880 $ 3,526 $ 41,436 $ (358,986) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2020 (3) $ 221 $ 9,778 $ — $ 3,298 $ 13,406 $ (3,323) (1) Transfers are assumed to occur at the beginning of the period. During the three months ended September 30, 2020, the Company transferred 2 Residential Mortgage Loan positions into the Level 2 category from the Level 3 category under the fair value hierarchy of ASC 820. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 13,206 Unrealized gain/(loss) on derivative and other instruments, net (3,631) Net realized gain/(loss) (8,377) Equity in earnings/(loss) from affiliates 13,406 Total $ 14,604 (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 9,999 Unrealized gain/(loss) on derivative and other instruments, net (25) Equity in earnings/(loss) from affiliates 13,406 Total $ 23,380 Three Months Ended September 30, 2019 (in thousands) Non-Agency RMBS Non-Agency RMBS Interest Only ABS CMBS CMBS Interest Only Residential Mortgage Loans Commercial Loans Excess Mortgage Servicing Rights AG Arc Securitized debt Beginning balance $ 561,145 $ 1,834 $ 20,571 $ 220,225 $ 46,836 $ 199,970 $ 118,005 $ 20,893 $ 18,717 $ (8,630) Transfers (1): Transfers into level 3 55,311 — — — — — — — — — Purchases/Transfers 72,933 — 473 39,095 — 181,053 60,803 — — — Issuances of Securitized Debt — — — — — — — — — (65,171) Capital Contributions — — — — — — — — 11,148 — Proceeds from sales/redemptions (23,630) — — — (917) — — — — — Proceeds from settlement (13,578) — (8,263) (5,777) — (6,364) (32,800) — — 630 Total net gains/(losses) (2) Included in net income 1,876 (412) (489) 4,419 (976) 4,718 510 (2,738) (2,594) (15) Ending Balance $ 654,057 $ 1,422 $ 12,292 $ 257,962 $ 44,943 $ 379,377 $ 146,518 $ 18,155 $ 27,271 $ (73,186) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2019 (3) $ 106 $ 371 $ (489) $ 4,356 $ (925) $ 4,651 $ 510 $ (2,328) $ (2,594) $ (15) (1) Transfers are assumed to occur at the beginning of the period. During the three months ended September 30, 2019, the Company transferred 9 Non-Agency RMBS securities into the Level 3 category from the Level 2 category under the fair value hierarchy of ASC 820. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 8,758 Unrealized gain/(loss) on derivative and other instruments, net (2,753) Net realized gain/(loss) 888 Equity in earnings/(loss) from affiliates (2,594) Total $ 4,299 (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 8,580 Unrealized gain/(loss) on derivative and other instruments, net (2,343) Equity in earnings/(loss) from affiliates (2,594) Total $ 3,643 Nine Months Ended September 30, 2020 (in thousands) Non-Agency Non-Agency CMBS CMBS Interest Residential Commercial Excess AG Arc Securitized Beginning balance $ 630,115 $ 1,074 $ 366,566 $ 47,992 $ 417,785 $ 158,686 $ 17,775 $ 28,546 $ (72,415) Transfers (1): Transfers into level 3 — — — — — — — — (151,933) Transfers out of level 3 (210,709) (1,074) (170,816) (22,055) — — — — 7,230 Purchases/Transfers 1,559 — 3,540 — 536,710 27,508 — — — Issuances of Securitized Debt — — — — — — — — (166,487) Proceeds from sales of assets and seizures of assets (362,199) — (148,111) (21,995) (393,559) (36,924) (8,460) — — Proceeds from settlement (11,823) — (9,367) — (50,563) (5,710) — — 16,021 Total net gains/(losses) (2) Included in net income (43,253) — (41,812) (3,942) (83,000) (20,680) (5,789) 12,890 8,598 Ending Balance $ 3,690 $ — $ — $ — $ 427,373 $ 122,880 $ 3,526 $ 41,436 $ (358,986) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2020 (3) $ (329) $ — $ — $ — $ (25,443) $ (14,210) $ (2,183) $ 12,890 $ 8,598 (1) Transfers are assumed to occur at the beginning of the period. During the nine months ended September 30, 2020, the Company transferred 50 Non-Agency RMBS securities, 2 Non-Agency RMBS Interest Only securities, 32 CMBS securities, 15 CMBS Interest Only securities and 1 securitized debt security into the Level 2 category from the Level 3 category under the fair value hierarchy of ASC 820. During the nine months ended September 30, 2020, the Company transferred 1 securitized debt security into the Level 3 category from the Level 2 category under the fair value hierarchy of ASC 820. Refer to Note 2 for more information on changes regarding the Company's leveling policy. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ (74,309) Unrealized gain/(loss) on derivative and other instruments, net 2,809 Net realized gain/(loss) (118,378) Equity in earnings/(loss) from affiliates 12,890 Total $ (176,988) (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ (39,982) Unrealized gain/(loss) on derivative and other instruments, net 6,415 Equity in earnings/(loss) from affiliates 12,890 Total $ (20,677) Nine Months Ended September 30, 2019 (in thousands) Non-Agency RMBS Non-Agency RMBS Interest Only ABS CMBS CMBS Interest Only Residential Mortgage Loans Commercial Loans Excess Mortgage Servicing Rights AG Arc Securitized debt Beginning balance $ 491,554 $ 3,099 $ 21,160 $ 211,054 $ 50,331 $ 186,096 $ 98,574 $ 26,650 $ 20,360 $ (10,858) Transfers (1): Transfers into level 3 88,511 — — — — — — — — — Transfers out of level 3 (39,557) — — (5,279) — — — — — — Purchases/Transfers 213,495 — 1,632 82,540 — 207,048 90,451 — — — Issuances of Securitized Debt — — — — — — — — — (65,171) Capital Contributions — — — — — — — — 17,837 — Proceeds from sales/redemptions (72,872) — (1,284) (20,165) (2,631) (12,780) — — — — Proceeds from settlement (41,451) — (9,446) (28,711) — (14,553) (43,217) — — 2,845 Total net gains/(losses) (2) Included in net income 14,377 (1,677) 230 18,523 (2,757) 13,566 710 (8,495) (10,926) (2) Ending Balance $ 654,057 $ 1,422 $ 12,292 $ 257,962 $ 44,943 $ 379,377 $ 146,518 $ 18,155 $ 27,271 $ (73,186) Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held as of September 30, 2019 (3) $ 10,193 $ (613) $ 165 $ 15,089 $ (2,631) $ 12,643 $ 710 $ (5,867) $ (10,926) $ (2) (1) Transfers are assumed to occur at the beginning of the period. During the nine months ended September 30, 2019, the Company transferred 14 Non-Agency RMBS securities into the Level 3 category from the Level 2 category and 4 Non-Agency RMBS and 2 CMBS securities into the Level 2 category from the Level 3 category under the fair value hierarchy of ASC 820. (2) Gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 38,503 Unrealized gain/(loss) on derivative and other instruments, net (8,497) Net realized gain/(loss) 4,469 Equity in earnings/(loss) from affiliates (10,926) Total $ 23,549 (3) Unrealized gains/(losses) are recorded in the following line items in the consolidated statement of operations: Unrealized gain/(loss) on real estate securities and loans, net $ 35,556 Unrealized gain/(loss) on derivative and other instruments, net (5,869) Equity in earnings/(loss) from affiliates (10,926) Total $ 18,761
Schedule of valuation techniques	The following tables present a summary of quantitative information about the significant unobservable inputs used in the fair value measurement of investments for which the Company has utilized Level 3 inputs to determine fair value. Asset Class Fair Value at September 30, 2020 (in thousands) Valuation Technique Unobservable Input Range Yield 8.28% - 8.28% (8.28%) Non-Agency RMBS $ 2,315 Discounted Cash Flow Projected Collateral Prepayments 5.58% - 5.58% (5.58%) Projected Collateral Losses 5.79% - 5.79% (5.79%) Projected Collateral Severities -5.73% - -5.73% (-5.73%) $ 1,375 Consensus Pricing Offered Quotes 89.00 - 89.00 (89.00) Yield 5.50% - 10.00% (6.63%) Residential Mortgage Loans $ 420,304 Discounted Cash Flow Projected Collateral Prepayments 3.52% - 10.11% (7.74%) Projected Collateral Losses 1.84% - 9.33% (2.75%) Projected Collateral Severities -8.56% - 46.07% (21.68%) $ 7,069 Consensus Pricing Offered Quotes 67.30 - 105.84 (98.59) Yield 11.22% - 18.30% (12.82%) Commercial Loans $ 122,880 Discounted Cash Flow Credit Spread 1,026 bps - 1,647 bps (1,170 bps) Recovery Percentage (2) 100.00% - 100.00% (100.00%) Excess Mortgage Servicing Rights Discounted Cash Flow Yield 9.00% - 9.70% (9.08%) $ 3,440 Projected Collateral Prepayments 12.65% - 16.20% (14.21%) $ 86 Consensus Pricing Offered Quotes 0.29 - 0.29 (0.29) AG Arc $ 41,436 Comparable Multiple Book Value Multiple 1.0x - 1.0x (1.0x) Liability Class Fair Value at September 30, 2020 (in thousands) Valuation Technique Unobservable Input Range Yield 3.02% - 6.50% (3.57%) Securitized debt $ (358,986) Discounted Cash Flow Projected Collateral Prepayments 6.13% - 8.68% (7.52%) Projected Collateral Losses 2.17% - 3.18% (2.63%) Projected Collateral Severities 16.88% - 21.48% (19.39%) (1) Amounts are weighted based on fair values. (2) Represents the proportion of the principal expected to be collected relative to the loan balances as of September 30, 2020. Asset Class Fair Value at December 31, 2019 (in thousands) Valuation Technique Unobservable Input Range Yield 1.71% - 100.00% (5.99%) Non-Agency RMBS $ 625,537 Discounted Cash Flow Projected Collateral Prepayments 0.00% - 100.00% (14.60%) Projected Collateral Losses 0.00% - 100.00% (2.93%) Projected Collateral Severities 0.00% - 100.00% (21.37%) $ 4,578 Consensus Pricing Offered Quotes 100.00 - 100.00 (100.00) Yield 27.50% - 27.50% (27.50%) Non-Agency RMBS Interest Only $ 1,074 Discounted Cash Flow Projected Collateral Prepayments 18.00% - 18.00% (18.00%) Projected Collateral Losses 2.00% - 2.00% (2.00%) Projected Collateral Severities 35.00% - 35.00% (35.00%) Yield 0.00% - 13.89% (6.33%) CMBS $ 366,566 Discounted Cash Flow Projected Collateral Prepayments 0.00% - 0.00% (0.00%) Projected Collateral Losses 0.00% - 0.00% (0.00%) Projected Collateral Severities 0.00% - 0.00% (0.00%) Yield -2.57% - 9.86% (4.19%) CMBS Interest Only $ 47,992 Discounted Cash Flow Projected Collateral Prepayments 99.00% - 100.00% (99.93%) Projected Collateral Losses 0.00% - 0.00% (0.00%) Projected Collateral Severities 0.00% - 0.00% (0.00%) Yield 4.00% - 8.25% (4.81%) Residential Mortgage Loans $ 364,107 Discounted Cash Flow Projected Collateral Prepayments 4.81% - 9.04% (7.78%) Projected Collateral Losses 1.64% - 4.94% (2.36%) Projected Collateral Severities -7.32% - 36.91% (23.15%) $ 53,678 Recent Transaction Cost N/A Yield 6.16% - 10.76% (6.86%) Commercial Loans $ 60,164 Discounted Cash Flow Credit Spread 440 bps - 900 bps (510 bps) Recovery Percentage (2) 100.00% - 100.00% (100.00%) $ 98,522 Consensus Pricing Offered Quotes 100.00 - 100.00 (100.00) Excess Mortgage Servicing Rights Yield 8.50% - 11.60% (9.20%) $ 17,633 Discounted Cash Flow Projected Collateral Prepayments 9.35% - 16.90% (12.36%) $ 142 Consensus Pricing Offered Quotes 0.01 - 0.40 (0.40) AG Arc $ 28,546 Comparable Multiple Book Value Multiple 1.0x - 1.0x (1.0x) Liability Class Fair Value at December 31, 2019 (in thousands) Valuation Technique Unobservable Input Range Yield 2.98% - 4.70% (3.54%) Securitized debt $ (72,415) Discounted Cash Flow Projected Collateral Prepayments 10.00% - 10.04% (10.04%) Projected Collateral Losses 2.04% - 3.50% (2.19%) Projected Collateral Severities 20.13% - 45.00% (22.61%) (1) Amounts are weighted based on fair values. (2) Represents the proportion of the principal expected to be collected relative to the loan balances as of December 31, 2019.

Financing arrangements (Tables)

Financing arrangements (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of repurchase agreements	The following table presents a summary of the Company's financing arrangements as of September 30, 2020 and December 31, 2019 (in thousands). September 30, 2020 December 31, 2019 Repurchase agreements $ 164,304 $ 3,121,966 Revolving facilities (1) 61,200 111,502 Financing arrangements $ 225,504 $ 3,233,468 (1) Increasing the Company's borrowing capacity under the Company's revolving facilities requires consent of the lenders. The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding real estate securities pledged as collateral as of September 30, 2020 ($ in thousands): Repurchase Agreements Real Estate Securities Pledged Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 30 days or less $ 140,386 0.94 % 15.4 % $ 174,449 $ 182,292 $ 483 The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding real estate securities pledged as collateral as of December 31, 2019 ($ in thousands): Repurchase Agreements Real Estate Securities Pledged Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 30 days or less $ 1,550,508 2.33 % 9.0 % $ 1,728,837 $ 1,660,649 $ 5,402 31-60 days 1,362,121 2.13 % 7.0 % 1,501,850 1,453,257 5,191 61-90 days 71,753 2.99 % 23.5 % 93,957 92,901 245 Greater than 180 days 2,973 3.79 % 23.7 % 4,039 3,690 3 Total / Weighted Average $ 2,987,355 2.25 % 8.5 % $ 3,328,683 $ 3,210,497 $ 10,841 The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding residential mortgage loans pledged as collateral as of September 30, 2020 ($ in thousands): Repurchase Agreements Residential Mortgage Loans Pledged (1) Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Funding Cost Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 61-90 days $ 23,918 4.10 % 4.10 % 42.7 % $ 45,019 $ 44,017 $ 704 (1) These amounts represent certain of the Company's retained interests in securitizations. Refer to Note 4 for more information on the August 2019 VIE and September 2020 VIE. The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding residential mortgage loans pledged as collateral as of December 31, 2019 ($ in thousands): Repurchase Agreements Residential Mortgage Loans Pledged (1) Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Funding Cost Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest 31-60 days $ 24,584 3.14 % 3.14 % 33.7 % $ 37,546 $ 25,192 $ 377 Greater than 180 days 107,010 3.61 % 3.80 % 19.3 % 133,678 135,409 443 Total / Weighted Average $ 131,594 3.53 % 3.68 % 22.0 % $ 171,224 $ 160,601 $ 820 (1) Balances contain certain of the Company's retained interests in securitizations. Refer to Note 4 for more information on the Company's August 2019 VIE. The Company did not have any repurchase agreements with any corresponding commercial loans pledged as collateral as of September 30, 2020. The following table presents a summary of financial information regarding the Company’s repurchase agreements and corresponding commercial loans pledged as collateral as of December 31, 2019 ($ in thousands): Repurchase Agreements Commercial Loans Pledged Repurchase Agreements Maturing Within: Balance Weighted Average Rate Weighted Average Funding Cost Weighted Average Haircut Fair Value Pledged Amortized Cost Accrued Interest Greater than 180 days $ 3,017 4.46 % 5.89 % 35.4 % $ 4,674 $ 4,674 $ 26
Schedule of securities collateral information	The following table presents information with respect to the Company’s posting of collateral under repurchase agreements on September 30, 2020 and December 31, 2019, broken out by investment type (in thousands): September 30, 2020 December 31, 2019 Fair Value of investments pledged as collateral under repurchase agreements Agency RMBS $ 107,252 $ 2,231,933 Non-Agency RMBS 26,711 682,828 CMBS 40,486 413,922 Residential Mortgage Loans 45,019 171,224 Commercial Loans — 4,674 Cash pledged (i.e., restricted cash) under repurchase agreements 38 11,565 Total collateral pledged under repurchase agreements $ 219,506 $ 3,516,146
Schedule of total borrowings under repurchase agreements	The following table presents information with respect to the Company’s total borrowings under repurchase agreements on September 30, 2020 and December 31, 2019, broken out by investment type (in thousands): September 30, 2020 December 31, 2019 Repurchase agreements secured by investments: Agency RMBS $ 101,284 $ 2,109,278 Non-Agency RMBS 15,597 565,450 CMBS 23,505 312,627 Residential Mortgage Loans 23,918 131,594 Commercial Loans — 3,017 Gross Liability for repurchase agreements $ 164,304 $ 3,121,966
Schedule of term loan and revolving facilities	The following table presents information regarding the Company's revolving facilities, excluding facilities within investments in debt and equity of affiliates, as of September 30, 2020 and December 31, 2019 ($ in thousands). September 30, 2020 December 31, 2019 Facility (1)(2)(3) Investment Maturity Date Rate Funding Cost Balance Net Carrying Value of Assets Pledged as Collateral Maximum Aggregate Borrowing Capacity Rate Funding Cost Balance Net Carrying Value of Assets Pledged as Collateral Revolving facility B (4) Residential mortgage loans June 28, 2021 — % — % $ — $ — $ — 3.80 % 3.80 % $ 21,546 $ 27,476 Revolving facility C Commercial loans August 10, 2023 2.31 % 2.79 % 61,200 95,595 100,000 3.85 % 4.01 % 89,956 132,856 Total revolving facilities $ 61,200 $ 95,595 $ 100,000 $ 111,502 $ 160,332 (1) All revolving facilities listed above are interest only until maturity. (2) Under the terms of the Company’s financing agreements, the Company's financial counterparties may, in certain cases, sell or re-hypothecate the pledged collateral. (3) Increasing the Company's borrowing capacity under this facility requires consent of the lender.
Schedule of repurchase agreement counterparty	The following tables present information at September 30, 2020 and December 31, 2019 with respect to each counterparty that provides the Company with financing for which the Company had greater than 5% of its stockholders’ equity at risk, excluding stockholders’ equity at risk under financing through affiliated entities ($ in thousands). September 30, 2020 Counterparty Stockholders’ Equity Weighted Average Percentage of Credit Suisse AG, Cayman Islands Branch $ 38,385 43 9.8 % December 31, 2019 Counterparty Stockholders’ Equity Weighted Average Percentage of Barclays Capital Inc. $ 77,334 277 9.1 % Citigroup Global Markets Inc. 50,263 22 5.9 %

Other assets and liabilities (T

Other assets and liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of other assets and other liabilities	The following table details certain information related to the Company's "Other assets" and "Other liabilities" line items on its consolidated balance sheet as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 December 31, 2019 Other assets Interest receivable $ 3,265 $ 13,548 Derivative assets, at fair value — 2,282 Other assets 5,382 4,378 Due from broker 512 1,697 Total Other assets $ 9,159 $ 21,905 Other liabilities Interest payable $ 654 $ 10,941 Derivative liabilities, at fair value 39 411 Due to affiliates (1) 13,766 5,226 Accrued expenses 4,351 6,175 Taxes payable — 815 Due to broker 2,134 1,107 Total Other liabilities $ 20,944 $ 24,675 (1) Refer to Note 11 for more information.
Schedule of Company's derivative and other instruments and their balance sheet location	The following table presents the fair value of the Company's derivatives and other instruments and their balance sheet location at September 30, 2020 and December 31, 2019 (in thousands). Derivatives and Other Instruments (1) Designation Balance Sheet September 30, 2020 December 31, 2019 Pay Fix/Receive Float Interest Rate Swap Agreements (2) Non-Hedge Other assets $ — $ 199 Pay Fix/Receive Float Interest Rate Swap Agreements (2) Non-Hedge Other liabilities (39) (411) Payer Swaptions Non-Hedge Other assets — 2,083 (1) As of September 30, 2020, the Company applied a fair value reduction of $27.3 thousand on its British Pound Futures liabilities related to variation margin. As of December 31, 2019, the Company applied a fair value reduction of $19.7 thousand and $0.1 million to its Euro Futures liabilities and British Pound Futures liabilities, respectively, related to variation margin.
Schedule of derivatives and other instruments	The following table summarizes information related to derivatives and other instruments (in thousands): Notional amount of non-hedge derivatives and other instruments: Notional Currency September 30, 2020 December 31, 2019 Pay Fix/Receive Float Interest Rate Swap Agreements USD $ 180,000 $ 1,848,750 Payer Swaptions USD — 650,000 Short positions on British Pound Futures (1) GBP 3,000 6,563 Short positions on Euro Futures (2) EUR — 1,500 (1) Each British Pound Future contract embodies £62,500 of notional value. (2) Each Euro Future contract embodies €125,000 of notional value.
Schedule of gains/(losses) related to derivatives and other instruments	The following table summarizes gains/(losses) related to derivatives and other instruments (in thousands): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 Included within Unrealized gain/(loss) on derivative and other instruments, net Interest Rate Swaps $ 170 $ 4,656 $ (11,418) $ (15,108) Eurodollar Futures — 233 — 1,001 Swaptions 1,051 531 354 (243) U.S. Treasury Futures — (37) — (181) British Pound Futures (57) 31 129 31 Euro Futures — — 20 — TBAs — (1,307) — (866) U.S. Treasuries — — — 82 1,164 4,107 (10,915) (15,284) Included within Net realized gain/(loss) Interest Rate Swaps — (18,060) (65,368) (59,140) Eurodollar Futures — 107 — (1,122) Swaptions (1,051) — (2,437) (861) U.S. Treasury Futures — (510) — (139) British Pound Futures (108) (138) 406 (138) Euro Futures — — 68 — TBAs — 1,152 4,610 2,753 U.S. Treasuries — 231 — (18) (1,159) (17,218) (62,721) (58,665) Total income/(loss) $ 5 $ (13,111) $ (73,636) $ (73,949)
Schedule of interest rate derivatives	The following table presents information about the Company’s interest rate swaps as of September 30, 2020 ($ in thousands): Maturity Notional Amount Weighted Average Weighted Average Weighted Average 2025 $ 136,000 0.34 % 0.13 % 4.95 2030 44,000 0.68 % 0.12 % 9.96 Total/Wtd Avg $ 180,000 0.42 % 0.13 % 6.18 Maturity Notional Amount Weighted Average Weighted Average Weighted Average 2020 $ 105,000 1.54 % 1.91 % 0.20 2022 743,000 1.64 % 1.91 % 2.68 2023 5,750 3.19 % 1.91 % 3.85 2024 650,000 1.52 % 1.90 % 4.80 2026 180,000 1.50 % 1.89 % 6.70 2029 165,000 1.77 % 1.94 % 9.85 Total/Wtd Avg $ 1,848,750 1.60 % 1.91 % 4.32
Schedule of to be announced securities activity	The Company did not hold any TBA positions for the three months ended September 30, 2020. The following tables present information about the Company’s TBAs for the three months ended September 30, 2019 and nine months ended September 30, 2020 and September 30, 2019 (in thousands): For the Three Months Ended: Beginning Notional Amount Buys or Covers Sales or Shorts Ending Net Notional Amount Net Fair Value as of Period End Net Receivable/(Payable) from/to Broker Derivative Asset Derivative Liability September 30, 2019 TBAs - Long $ 125,000 $ 475,000 $ (450,000) $ 150,000 $ 153,175 $ (154,042) $ 386 $ (1,253) TBAs - Short $ (100,000) $ 300,000 $ (200,000) $ — $ — $ — $ — $ — For the Nine Months Ended: Beginning Notional Amount Buys or Covers Sales or Shorts Ending Net Notional Amount Net Fair Value as of Period End Net Receivable/(Payable) from/to Broker Derivative Asset Derivative Liability September 30, 2020 TBAs - Long $ — $ 728,000 $ (728,000) $ — $ — $ — $ — $ — September 30, 2019 TBAs - Long $ — $ 1,869,500 $ (1,719,500) $ 150,000 $ 153,175 $ (154,042) $ 386 $ (1,253) TBAs - Short $ — $ 485,000 $ (485,000) $ — $ — $ — $ — $ —

Earnings per share (Tables)

Earnings per share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of basic and diluted earnings per share	The following table presents a reconciliation of the earnings and shares used in calculating basic and diluted EPS for the three and nine months ended September 30, 2020 and September 30, 2019 (in thousands, except per share data): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2019 September 30, 2020 September 30, 2019 Numerator: Net Income/(Loss) from Continuing Operations $ 20,046 $ 11,106 $ (462,271) $ 61,166 Gain on Exchange Offer, net 539 — 539 — Dividends on preferred stock (5,563) (3,720) (16,897) (10,455) Net income/(loss) from continuing operations available to common stockholders $ 15,022 $ 7,386 $ (478,629) $ 50,711 Net Income/(Loss) from Discontinued Operations — (1,057) 361 (3,284) Net income/(loss) available to common stockholders $ 15,022 $ 6,329 $ (478,268) $ 47,427 Denominator: Basic weighted average common shares outstanding 34,422 32,736 33,347 32,007 Dilutive effect of restricted stock units — 12 — 9 Diluted weighted average common shares outstanding 34,422 32,748 33,347 32,016 Earnings/(Loss) Per Share - Basic Continuing Operations $ 0.44 $ 0.22 $ (14.35) $ 1.58 Discontinued Operations — (0.03) 0.01 (0.10) Total Earnings/(Loss) Per Share of Common Stock $ 0.44 $ 0.19 $ (14.34) $ 1.48 Earnings/(Loss) Per Share - Diluted Continuing Operations $ 0.44 $ 0.22 $ (14.35) $ 1.58 Discontinued Operations — (0.03) 0.01 (0.10) Total Earnings/(Loss) Per Share of Common Stock $ 0.44 $ 0.19 $ (14.34) $ 1.48
Schedule of dividends declared and paid	The following table details the aggregate and per-share amounts of arrearages in cumulative, unpaid, and undeclared preferred dividends as of September 30, 2020 (in thousands, except per share data): Class of Stock Dividend Per Preferred Share in Arrears Amount of Preferred Dividend in Arrears 8.25% Series A $ 1.03126 $ 2,091 8.00% Series B 1.00 4,569 8.000% Series C 1.00 4,571 Total $ 11,231 The following tables detail the Company's common stock dividends declared during the nine months ended September 30, 2019: 2019 Declaration Date Record Date Payment Date Dividend Per Share 3/15/2019 3/29/2019 4/30/2019 $ 0.50 6/14/2019 6/28/2019 7/31/2019 0.50 9/6/2019 9/30/2019 10/31/2019 0.45 Total $ 1.45 The following tables detail the Company's preferred stock dividends during the nine months ended September 30, 2020 and September 30, 2019. Cash Dividend Per Share Declaration Date Record Date Payment Date 8.25% Series A 8.00% Series B 8.000% Series C 2/14/2020 2/28/2020 3/17/2020 $ 0.51563 $ 0.50 $ 0.50 2/15/2019 2/28/2019 3/18/2019 0.51563 0.50 — 5/17/2019 5/31/2019 6/17/2019 0.51563 0.50 — 8/16/2019 8/30/2019 9/17/2019 0.51563 0.50 —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of outstanding commitments	The below table details the Company's outstanding commitments as of September 30, 2020 (in thousands): Commitment type Date of Commitment Total Commitment Funded Commitment Remaining Commitment Commercial loan G (a)(b) July 26, 2018 $ 78,806 $ 56,697 $ 22,109 Commercial loan I (a)(c) January 23, 2019 20,000 15,211 4,789 Commercial loan K (a) February 22, 2019 20,000 14,173 5,827 LOTS (d) Various 39,361 24,191 15,170 Total $ 158,167 $ 110,272 $ 47,895 (a) The Company entered into commitments on commercial loans relating to construction projects. See Note 4 for further details. (b) Paydowns of $5.7 million on Commercial loan G during the quarter decreased the total commitment from $84.5 million to $78.8 million. (c) Subsequent to quarter end, the Company and the borrower of Loan I entered into a modification agreement to, among other things, extend the term of the Loan, allow for a portion of the interest to be deferred and increase the capital commitment amount by $6.0 million. (d) Refer to Note 11 "Investments in debt and equity of affiliates" for more information regarding LOTS.

Discontinued Operations and A_2

Discontinued Operations and Assets and Liabilities Held for Sale (Tables)	9 Months Ended
	Sep. 30, 2020
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Single-Family Rental Property's Discontinued Operations	The table below presents the Company's results of operations for the three and nine months ended September 30, 2020 and September 30, 2019, for the single-family rental properties segment's discontinued operations as reported separately as net income (loss) from discontinued operations, net of tax (in thousands). There was no net income or loss from discontinued operations for the three months ended September 30, 2020. Three Months Ended Nine Months Ended September 30, 2019 September 30, 2020 September 30, 2019 Interest expense $ (1,247) $ — $ (3,741) Other Income/(Loss) Rental income 3,309 — 9,868 Net realized gain/(loss) — — (96) Other income 34 — 346 Total Other Income/(Loss) 3,343 — 10,118 Expenses Other operating expenses 154 (80) 246 Property depreciation and amortization 1,013 — 3,640 Property operating expenses 1,986 (281) 5,775 Total Expenses 3,153 (361) 9,661 Net Income/(Loss) from Discontinued Operations $ (1,057) $ 361 $ (3,284) The table below presents the Company's statement of net positions for the years ended September 30, 2020 and December 31, 2019, respectively, for the single-family rental properties segment's discontinued operations as reported separately as assets and liabilities held for sale on our consolidated balance sheets (in thousands): September 30, 2020 December 31, 2019 Assets Other assets $ — $ 154 Liabilities Other liabilities $ 305 $ 1,546

Organization - Narrative (Detai

Organization - Narrative (Details) $ / shares in Units, $ in Thousands	Sep. 24, 2020USD ($)shares	Sep. 30, 2020USD ($)$ / shares	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)$ / shares	Sep. 30, 2019USD ($)	Aug. 31, 2020$ / shares	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)$ / shares	Jun. 30, 2019USD ($)
Gain (Loss) on Securities [Line Items]
Common stock book value (in usd per share) | $ / shares		$ 3.34		$ 3.34				$ 17.61
Portfolio value		$ 903,700		$ 903,700				$ 4,000,000
Gain (loss) on termination of portfolio				(65,400)
Financing arrangements		$ 225,504		$ 225,504				$ 3,233,468
Leverage ratio		1.8		1.8				4.1
Proceeds from sales of real estate securities				$ 2,722,425	$ 677,554
Proceeds from sales of excess MSRs		$ 8,500		$ 7,735	$ 0
Loan securitization, ownership interest		44.60%	44.60%	44.60%	44.60%	45.00%			44.60%
Management fee payable		$ 1,200		$ 1,200				$ 2,700
Value of shares issued for services (in dollars per share) | $ / shares						$ 3.15
Base Management Fee Q1 & Q2 2020
Gain (Loss) on Securities [Line Items]
Management fee payable	$ 3,800
Base Management Fee Q1 & Q2 2020 | Common Stock
Gain (Loss) on Securities [Line Items]
Stock issued for services (in shares) | shares	1,215,370
Base Management Fee Q3 2020
Gain (Loss) on Securities [Line Items]
Management fee payable	$ 500
Base Management Fee Q3 2020 | Common Stock
Gain (Loss) on Securities [Line Items]
Stock issued for services (in shares) | shares	154,500
Residential Portfolio Segment
Gain (Loss) on Securities [Line Items]
Payments to purchase loans		60,200
Transfer of loans		199,600
Proceeds from sale of loans		6,200		389,000	$ 12,800
Commercial Portfolio Segment
Gain (Loss) on Securities [Line Items]
Proceeds from sale of loans		2,700		36,900
Total Agency RBMS
Gain (Loss) on Securities [Line Items]
Payments to purchase loans		250,100
Settled Securities
Gain (Loss) on Securities [Line Items]
Proceeds from sales of real estate securities		38,800	$ 231,500	2,700,000	677,600
Senior Tranches
Gain (Loss) on Securities [Line Items]
Loan securitization, fair value		$ 24,300	$ 28,700	$ 24,300	$ 28,700		$ 26,600	$ 21,400	$ 42,900

Summary of significant accoun_4

Summary of significant accounting policies - Narrative (Details) - USD ($)	Sep. 17, 2019	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Apr. 03, 2020	Dec. 31, 2019
Investments in and Advances to Affiliates [Line Items]
Cash and cash equivalents		$ 31,468,000	$ 44,592,000	$ 31,468,000		$ 81,692,000
Cash equivalents			0			$ 53,200,000
Remaining equity percentage					35.00%
December 2014 VIE
Investments in and Advances to Affiliates [Line Items]
Deconsolidation gain (loss)			2,100,000
August 2018 VIE
Investments in and Advances to Affiliates [Line Items]
Deconsolidation gain (loss)			$ 8,300,000
8.25% Series A Cumulative Redeemable Preferred Stock
Investments in and Advances to Affiliates [Line Items]
Preferred stock dividend percentage			8.25%
Liquidation preference (in dollars per share)			$ 25
8.00% Series B Cumulative Redeemable Preferred Stock
Investments in and Advances to Affiliates [Line Items]
Preferred stock dividend percentage			8.00%
Liquidation preference (in dollars per share)			$ 25
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Investments in and Advances to Affiliates [Line Items]
Preferred stock dividend percentage	8.00%	8.00%	8.00%	8.00%
Liquidation preference (in dollars per share)	$ 25		$ 25
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | LIBOR Floating Rate
Investments in and Advances to Affiliates [Line Items]
Preferred stock dividend percentage	6.476%

Summary of significant accoun_5

Summary of significant accounting policies - Schedule of investments in debt and equity of affiliates (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Investments in and Advances to Affiliates [Line Items]
Investments in debt and equity of affiliates	$ 138,689	$ 156,311
Residential and Commercial Real Estates Assets
Investments in and Advances to Affiliates [Line Items]
Related financing	117,000	200,300
Unpaid principal of loans excluded	24,500
Residential and Commercial Real Estates Assets | LOTS
Investments in and Advances to Affiliates [Line Items]
Investments fair market value	25,500	17,000
Residential and Commercial Real Estates Assets | Mortgage Acquisition Trust
Investments in and Advances to Affiliates [Line Items]
Investments fair market value	152,500	254,300
Assets
Investments in and Advances to Affiliates [Line Items]
Investments fair market value	217,643	373,126
Investments in debt and equity of affiliates	264,004	414,625
Cash and Other assets/(liabilities)	4,925	12,953
Assets | ARC Home LLC
Investments in and Advances to Affiliates [Line Items]
Investments in debt and equity of affiliates	41,436	28,546
Liabilities
Investments in and Advances to Affiliates [Line Items]
Investments fair market value	123,861	257,068
Investments in debt and equity of affiliates	125,315	258,314
Cash and Other assets/(liabilities)	1,454	1,246
Liabilities | ARC Home LLC
Investments in and Advances to Affiliates [Line Items]
Investments in debt and equity of affiliates	0	0
Equity
Investments in and Advances to Affiliates [Line Items]
Investments fair market value	93,782	116,058
Investments in debt and equity of affiliates	138,689	156,311
Cash and Other assets/(liabilities)	3,471	11,707
Equity | ARC Home LLC
Investments in and Advances to Affiliates [Line Items]
Investments in debt and equity of affiliates	$ 41,436	$ 28,546

Real Estate Securities - Summar

Real Estate Securities - Summary of real estate securities portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 1,232,570	$ 7,492,613
Premium / (Discount)	(872,461)	(4,176,790)
Amortized Cost	360,109	3,315,823
Gross Unrealized Gains	5,646	137,283
Gross Unrealized Losses	(18,133)	(3,274)
Fair Value	$ 347,622	$ 3,449,832
Weighted Average Coupon	1.04%	2.20%
Weighted Average Yield	2.60%	4.37%
Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 230,158	$ 978,616
Premium / (Discount)	(187,301)	(315,796)
Amortized Cost	42,857	662,820
Gross Unrealized Gains	4,306	55,343
Gross Unrealized Losses	(3,892)	(693)
Fair Value	$ 43,271	$ 717,470
Weighted Average Coupon	2.34%	4.40%
Weighted Average Yield	6.42%	6.28%
Commercial Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 765,270	$ 3,912,738
Premium / (Discount)	(697,920)	(3,516,869)
Amortized Cost	67,350	395,869
Gross Unrealized Gains	1,082	22,206
Gross Unrealized Losses	(14,204)	(1,152)
Fair Value	$ 54,228	$ 416,923
Weighted Average Coupon	0.44%	0.60%
Weighted Average Yield	6.11%	7.21%
Agency RMBS: 30 Year Fixed Rate
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 237,142	$ 2,125,067
Premium / (Discount)	12,760	59,123
Amortized Cost	249,902	2,184,190
Gross Unrealized Gains	258	57,404
Gross Unrealized Losses	(37)	(296)
Fair Value	$ 250,123	$ 2,241,298
Weighted Average Coupon	2.21%	3.73%
Weighted Average Yield	1.17%	3.17%
Agency RMBS: Interest Only
Debt Securities, Available-for-sale [Line Items]
Current Face		$ 476,192
Premium / (Discount)		(403,248)
Amortized Cost		72,944
Gross Unrealized Gains		2,330
Gross Unrealized Losses		(1,133)
Fair Value		$ 74,141
Weighted Average Coupon		3.93%
Weighted Average Yield		5.87%
Total Agency RBMS
Debt Securities, Available-for-sale [Line Items]
Current Face		$ 2,601,259
Premium / (Discount)		(344,125)
Amortized Cost		2,257,134
Gross Unrealized Gains		59,734
Gross Unrealized Losses		(1,429)
Fair Value		$ 2,315,439
Weighted Average Coupon		3.77%
Weighted Average Yield		3.26%
Non-Agency, Prime | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 14,104	$ 297,932
Premium / (Discount)	(6,356)	(84,876)
Amortized Cost	7,748	213,056
Gross Unrealized Gains	660	29,052
Gross Unrealized Losses	(46)	(221)
Fair Value	$ 8,362	$ 241,887
Weighted Average Coupon	3.69%	4.92%
Weighted Average Yield	7.64%	7.44%
Non-Agency, Alt-A/Subprime | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 16,471	$ 141,464
Premium / (Discount)	(9,676)	(30,859)
Amortized Cost	6,795	110,605
Gross Unrealized Gains	2,951	12,234
Gross Unrealized Losses	0	(127)
Fair Value	$ 9,746	$ 122,712
Weighted Average Coupon	4.25%	4.40%
Weighted Average Yield	5.25%	6.89%
Non-Agency, Credit Risk Transfer | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 15,523	$ 270,397
Premium / (Discount)	0	591
Amortized Cost	15,523	270,988
Gross Unrealized Gains	0	8,972
Gross Unrealized Losses	(3,489)	(5)
Fair Value	$ 12,034	$ 279,955
Weighted Average Coupon	4.70%	5.17%
Weighted Average Yield	4.60%	5.27%
Non-Agency, Non US Residential Mortgage Backed Securities | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 2,869	$ 44,867
Premium / (Discount)	811	9,473
Amortized Cost	3,680	54,340
Gross Unrealized Gains	40	3,391
Gross Unrealized Losses	(276)	0
Fair Value	$ 3,444	$ 57,731
Weighted Average Coupon	6.16%	3.21%
Weighted Average Yield	6.08%	3.58%
Non-Agency RMBS Interest Only | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 171,444	$ 209,362
Premium / (Discount)	(171,365)	(207,948)
Amortized Cost	79	1,414
Gross Unrealized Gains	281	0
Gross Unrealized Losses	(48)	(340)
Fair Value	$ 312	$ 1,074
Weighted Average Coupon	0.55%	0.77%
Weighted Average Yield	14.42%	5.96%
Non-Agency, Re/Non-Performing Securities | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 2,758	$ 5,966
Premium / (Discount)	(539)	(1,965)
Amortized Cost	2,219	4,001
Gross Unrealized Gains	128	1,180
Gross Unrealized Losses	(33)	0
Fair Value	$ 2,314	$ 5,181
Weighted Average Coupon	5.25%	5.18%
Weighted Average Yield	9.99%	19.20%
Non-Agency, Land Related Financing | Residential Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 6,989	$ 8,628
Premium / (Discount)	(176)	(212)
Amortized Cost	6,813	8,416
Gross Unrealized Gains	246	514
Gross Unrealized Losses	0	0
Fair Value	$ 7,059	$ 8,930
Weighted Average Coupon	7.75%	7.75%
Weighted Average Yield	8.33%	8.26%
Conduit | Commercial Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 4,925	$ 72,318
Premium / (Discount)	(1,081)	(9,181)
Amortized Cost	3,844	63,137
Gross Unrealized Gains	0	811
Gross Unrealized Losses	(781)	(602)
Fair Value	$ 3,063	$ 63,346
Weighted Average Coupon	4.78%	4.24%
Weighted Average Yield	11.88%	5.57%
Single Asset Single Borrower | Commercial Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 50,480	$ 204,702
Premium / (Discount)	(1,543)	(5,606)
Amortized Cost	48,937	199,096
Gross Unrealized Gains	829	879
Gross Unrealized Losses	(11,588)	(304)
Fair Value	$ 38,178	$ 199,671
Weighted Average Coupon	4.17%	5.09%
Weighted Average Yield	4.84%	5.57%
Freddie Mac K-Series CMBS | Commercial Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 22,572	$ 208,693
Premium / (Discount)	(12,221)	(119,809)
Amortized Cost	10,351	88,884
Gross Unrealized Gains	48	17,030
Gross Unrealized Losses	(1,763)	0
Fair Value	$ 8,636	$ 105,914
Weighted Average Coupon	3.84%	5.70%
Weighted Average Yield	8.98%	11.54%
CMBS Interest Only | Commercial Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 687,293	$ 3,427,025
Premium / (Discount)	(683,075)	(3,382,273)
Amortized Cost	4,218	44,752
Gross Unrealized Gains	205	3,486
Gross Unrealized Losses	(72)	(246)
Fair Value	$ 4,351	$ 47,992
Weighted Average Coupon	0.10%	0.24%
Weighted Average Yield	7.51%	6.68%
Total Credit Investments
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 995,428	$ 4,891,354
Premium / (Discount)	(885,221)	(3,832,665)
Amortized Cost	110,207	1,058,689
Gross Unrealized Gains	5,388	77,549
Gross Unrealized Losses	(18,096)	(1,845)
Fair Value	$ 97,499	$ 1,134,393
Weighted Average Coupon	0.72%	1.31%
Weighted Average Yield	6.25%	6.62%

Real Estate Securities - Narrat

Real Estate Securities - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)security	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)security
Debt Securities, Available-for-sale [Line Items]
Proceeds from sales of real estate securities			$ 2,722,425	$ 677,554
Settled Securities
Debt Securities, Available-for-sale [Line Items]
Other than temporary impairment charge on securities		$ 3,100		$ 14,200
Number of securities sold | security	13	25	341	71
Proceeds from sales of real estate securities	$ 38,800	$ 231,500	$ 2,700,000	$ 677,600
Securities, gross realized gains	700		54,000
Securities, gross realized losses	$ 4,500		$ 180,400
Unsettled Securities
Debt Securities, Available-for-sale [Line Items]
Number of securities sold | security		3		3
Proceeds from sales of real estate securities		$ 4,500		$ 4,500
Securities, gross realized gains		7,100		15,200
Securities, gross realized losses		2,500		4,800
Fair Values of Securities
Debt Securities, Available-for-sale [Line Items]
Other than temporary impairment, not recognized in a prior period		$ 2,200		$ 3,400

Real Estate Securities - Summ_2

Real Estate Securities - Summary of weighted average life of real estate securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Agency RMBS
Fair Value
Less than or equal to 1 year	$ 0	$ 0
Greater than one year and less than or equal to five years	98,388	313,855
Greater than five years and less than or equal to ten years	151,735	2,001,584
Greater than ten years	0	0
Total	250,123	2,315,439
Amortized Cost
Less than or equal to 1 year	0	0
Greater than one year and less than or equal to five years	98,372	302,520
Greater than five years and less than or equal to ten years	151,530	1,954,614
Greater than ten years	0	0
Total	$ 249,902	$ 2,257,134
Weighted Average Coupon
Less than or equal to 1 year	0.00%	0.00%
Greater than one year and less than or equal to five years	2.43%	4.01%
Greater than five years and less than or equal to ten years	2.08%	3.71%
Greater than ten years	0.00%	0.00%
Total	2.21%	3.77%
Credit Investments
Fair Value
Less than or equal to 1 year	$ 16,576	$ 82,474
Greater than one year and less than or equal to five years	25,931	525,192
Greater than five years and less than or equal to ten years	17,945	296,665
Greater than ten years	37,047	230,062
Total	97,499	1,134,393
Amortized Cost
Less than or equal to 1 year	21,741	82,273
Greater than one year and less than or equal to five years	32,723	508,038
Greater than five years and less than or equal to ten years	18,740	263,300
Greater than ten years	37,003	205,078
Total	$ 110,207	$ 1,058,689
Weighted Average Coupon
Less than or equal to 1 year	1.33%	0.56%
Greater than one year and less than or equal to five years	0.45%	1.29%
Greater than five years and less than or equal to ten years	0.38%	1.06%
Greater than ten years	4.31%	5.46%
Total	0.72%	1.31%

Real Estate Securities - Summ_3

Real Estate Securities - Summary of Company's consolidated related to the August 2018 VIE (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Real estate securities, at fair value:
Other assets		$ 9,159	$ 21,905
Total Assets		1,101,224	4,347,817
Liabilities
Financing arrangements		225,504	3,233,468
Securitized debt, at fair value	[1],[2]	358,986	224,348
Other liabilities		20,944	24,675
Total Liabilities		710,755	3,498,771
Variable Interest Entity, Primary Beneficiary
Real estate securities, at fair value:
Other assets			808
Total Assets			109,146
Liabilities
Financing arrangements			70,712
Securitized debt, at fair value			7,230
Other liabilities			3,553
Total Liabilities			81,495
Non-Agency
Real estate securities, at fair value:
Real estate securities, at fair value	[1]	43,271	717,470
Non-Agency | Variable Interest Entity, Primary Beneficiary
Real estate securities, at fair value:
Real estate securities, at fair value			13,838
CMBS
Real estate securities, at fair value:
Real estate securities, at fair value		$ 54,228	416,923
CMBS | Variable Interest Entity, Primary Beneficiary
Real estate securities, at fair value:
Real estate securities, at fair value			$ 94,500
[1]	See Note 3 for details related to variable interest entities.
[2]	See Note 4 for details related to variable interest entities.

Real Estate Securities - Summ_4

Real Estate Securities - Summary of Company's consolidated related to the December 2014 VIE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 7,492,613	$ 1,232,570
Fair Value	$ 3,449,832	$ 347,622
Weighted Average Coupon	2.20%	1.04%
Weighted Average Yield	4.37%	2.60%
Securitized debt, at fair value	$ 7,200
Resecuritized Asset
Debt Securities, Available-for-sale [Line Items]
Current Face	15,055
Fair Value	$ 13,838
Weighted Average Coupon	4.46%
Weighted Average Yield	10.81%
Weighted Average Life (Years)	4 years 11 months 1 day
Resecuritized Asset | Consolidated Tranches
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 7,204
Fair Value	$ 7,230
Weighted Average Coupon	3.46%
Weighted Average Yield	4.11%
Weighted Average Life (Years)	1 year 11 months 15 days
Resecuritized Asset | Retained Tranche
Debt Securities, Available-for-sale [Line Items]
Current Face	$ 7,851
Fair Value	$ 6,608
Weighted Average Coupon	5.37%
Weighted Average Yield	18.14%
Weighted Average Life (Years)	7 years 7 months 20 days

Loans - Narrative (Details)

Loans - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 01, 2020USD ($)	Jan. 31, 2020USD ($)	Dec. 31, 2019USD ($)loan
Gain (Loss) on Securities [Line Items]
Fair market value	$ 429,648,000		$ 429,648,000				$ 417,785,000
Discount accretion	44,500		200,000
Loans Pools
Gain (Loss) on Securities [Line Items]
Other than temporary impairment recognized		$ 100,000		$ 100,000
Nonperforming Financial Instruments
Gain (Loss) on Securities [Line Items]
Fair market value		4,600,000		4,600,000
Unpaid principal balance		4,900,000		4,900,000
Interest income recognized				100,000
Estimate of Fair Value Measurement | Nonperforming Financial Instruments
Gain (Loss) on Securities [Line Items]
Fair market value		$ 4,300,000		$ 4,300,000
Residential Portfolio Segment
Gain (Loss) on Securities [Line Items]
Loan balances	518,510,000		518,510,000		$ 71,700,000	$ 481,700,000	464,041,000
Fair market value	$ 429,648,000		$ 429,648,000		$ 60,200,000	$ 450,300,000	417,785,000
Number of loans sold | loan	52		2,410	79
Proceeds from sale of loans	$ 6,200,000		$ 389,000,000	$ 12,800,000
Realized gain on sale of loan	300,000		1,800,000	1,000,000
Realized loss on sale of loan	600,000		59,300,000	$ 200,000
Mortgage loans in process of foreclosure	$ 33,000,000		$ 33,000,000				$ 35,600,000
Number of conventional loans with balances | loan	3,394		3,394				3,413
Residential Portfolio Segment | Minimum
Gain (Loss) on Securities [Line Items]
Loan balances	$ 5,600		$ 5,600				$ 3,800
Residential Portfolio Segment | Maximum
Gain (Loss) on Securities [Line Items]
Loan balances	$ 3,400,000		$ 3,400,000				$ 3,400,000
Commercial Portfolio Segment
Gain (Loss) on Securities [Line Items]
Number of loans sold | loan	1		2
Proceeds from sale of loans	$ 2,700,000		$ 36,900,000
Realized loss on sale of loan	$ 4,700,000		$ 6,500,000

Loans - Summary of company's re

Loans - Summary of company's residential mortgage loan portfolio (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 01, 2020	Jan. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost	$ 122,880	$ 158,686
Fair Value	429,648	417,785
Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid  Principal Balance	518,510	464,041	$ 71,700	$ 481,700
Premium (Discount)	(72,943)	(55,219)
Amortized Cost	445,567	408,822
Gross Unrealized Gains	3,786	9,065
Gross Unrealized Losses	(19,705)	(102)
Fair Value	$ 429,648	$ 417,785	$ 60,200	$ 450,300
Weighted Average Coupon	3.64%	4.09%
Weighted Average Yield	5.17%	5.72%
Weighted Average Life (Years)	6 years 9 months 3 days	7 years 4 months 9 days

Loans - Summary of company's _2

Loans - Summary of company's re-performing and non-performing residential mortgage loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 01, 2020	Jan. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Fair Value	$ 429,648			$ 417,785
Residential Portfolio Segment
Debt Instrument [Line Items]
Fair Value	429,648	$ 60,200	$ 450,300	417,785
Unpaid  Principal Balance	518,510	$ 71,700	$ 481,700	464,041
Residential Portfolio Segment | Re-Performing
Debt Instrument [Line Items]
Fair Value	306,845			330,234
Unpaid  Principal Balance	359,230			357,678
Residential Portfolio Segment | Non-Performing
Debt Instrument [Line Items]
Fair Value	113,461			87,551
Unpaid  Principal Balance	138,422			106,363
Residential Portfolio Segment | Other
Debt Instrument [Line Items]
Fair Value	9,342			0
Unpaid  Principal Balance	$ 20,858			$ 0

Loans - Summary of concentratio

Loans - Summary of concentrations of credit risk (Details) - Residential Portfolio Segment - Geographic Concentration Risk - Accounts Receivable	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentration of credit risk	17.00%	19.00%
Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentration of credit risk	11.00%	11.00%
New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentration of credit risk	10.00%	9.00%
New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Geographic concentration of credit risk	6.00%	6.00%

Loans - Summary of changes in t

Loans - Summary of changes in the accretable portion of discounts (Details) - Residential Portfolio Segment - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Changes in the accretable portion
Beginning Balance	$ 138,161	$ 89,515	$ 168,877	$ 79,610
Additions	31,115	70,279	160,132	90,515
Accretion	(5,073)	(4,286)	(21,538)	(10,987)
Reclassifications from/(to) non-accretable difference	(1,064)	(1,089)	(25,741)	515
Disposals	(2,298)	(53)	(120,889)	(5,287)
Ending Balance	$ 160,841	$ 154,366	$ 160,841	$ 154,366

Loans - Summary of assets and l

Loans - Summary of assets and liabilities related to August 2019 and September 2020 VIE (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Residential mortgage loans, at fair value	[1]	$ 429,648	$ 417,785
Restricted cash		1,976	0
Other assets		9,159	21,905
Total Assets		1,101,224	4,347,817
Financing arrangements		225,504	3,233,468
Securitized debt, at fair value	[1],[2]	358,986	224,348
Other liabilities		20,944	24,675
Total Liabilities		710,755	3,498,771
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Other assets			808
Total Assets			109,146
Financing arrangements			70,712
Securitized debt, at fair value			7,230
Other liabilities			3,553
Total Liabilities			81,495
Variable Interest Entity, Primary Beneficiary | August 2019 And September 2020 VIE
Variable Interest Entity [Line Items]
Residential mortgage loans, at fair value		420,200	255,171
Other assets		2,596	898
Total Assets		424,772	256,069
Financing arrangements		23,918	24,584
Securitized debt, at fair value		358,986	217,118
Other liabilities		546	596
Total Liabilities		$ 383,450	$ 242,298
[1]	See Note 4 for details related to variable interest entities.
[2]	See Note 3 for details related to variable interest entities.

Loans - Summary of certain info

Loans - Summary of certain information related to August 2019 and September 2020 VIE (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 01, 2020	Jan. 31, 2020
Receivables with Imputed Interest [Line Items]
Residential mortgage loans	$ 429,648	$ 417,785
Securitized debt	$ 358,986	$ 224,348
Variable Interest Entity, Primary Beneficiary | August 2019 VIE
Receivables with Imputed Interest [Line Items]
Weighted Average Coupon	2.96%	2.92%
Weighted Average Yield	2.97%	2.86%
Weighted Average Life (Years)	5 years 1 month 17 days	5 years
Variable Interest Entity, Primary Beneficiary | September 2020 VIE
Receivables with Imputed Interest [Line Items]
Weighted Average Coupon	2.98%
Weighted Average Yield	3.00%
Weighted Average Life (Years)	2 years 1 month 2 days
Residential Portfolio Segment
Receivables with Imputed Interest [Line Items]
Residential mortgage loans	$ 429,648	$ 417,785	$ 60,200	$ 450,300
Residential Portfolio Segment | Variable Interest Entity, Primary Beneficiary | August 2019 VIE
Receivables with Imputed Interest [Line Items]
Weighted Average Coupon	3.71%	3.96%
Weighted Average Yield	4.80%	5.11%
Weighted Average Life (Years)	6 years 11 months 19 days	7 years 7 months 28 days
Residential Portfolio Segment | Variable Interest Entity, Primary Beneficiary | September 2020 VIE
Receivables with Imputed Interest [Line Items]
Weighted Average Coupon	3.58%
Weighted Average Yield	5.46%
Weighted Average Life (Years)	6 years 8 months 19 days
Current Unpaid Principal Balance | Variable Interest Entity, Primary Beneficiary | August 2019 VIE
Receivables with Imputed Interest [Line Items]
Securitized debt	$ 206,434	$ 217,455
Current Unpaid Principal Balance | Variable Interest Entity, Primary Beneficiary | September 2020 VIE
Receivables with Imputed Interest [Line Items]
Securitized debt	163,487
Current Unpaid Principal Balance | Residential Portfolio Segment | Variable Interest Entity, Primary Beneficiary | August 2019 VIE
Receivables with Imputed Interest [Line Items]
Residential mortgage loans	248,023	263,956
Current Unpaid Principal Balance | Residential Portfolio Segment | Variable Interest Entity, Primary Beneficiary | September 2020 VIE
Receivables with Imputed Interest [Line Items]
Residential mortgage loans	249,071
Fair Value | Variable Interest Entity, Primary Beneficiary | August 2019 And September 2020 VIE
Receivables with Imputed Interest [Line Items]
Securitized debt	359,000
Fair Value | Variable Interest Entity, Primary Beneficiary | August 2019 VIE
Receivables with Imputed Interest [Line Items]
Securitized debt	195,499	217,118
Fair Value | Variable Interest Entity, Primary Beneficiary | September 2020 VIE
Receivables with Imputed Interest [Line Items]
Securitized debt	163,487
Fair Value | Residential Portfolio Segment | Variable Interest Entity, Primary Beneficiary | August 2019 VIE
Receivables with Imputed Interest [Line Items]
Residential mortgage loans	220,590	$ 255,171
Fair Value | Residential Portfolio Segment | Variable Interest Entity, Primary Beneficiary | September 2020 VIE
Receivables with Imputed Interest [Line Items]
Residential mortgage loans	$ 199,610

Loans - Summary of company's co

Loans - Summary of company's commercial loan portfolio (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Nov. 06, 2020
Gain (Loss) on Securities [Line Items]
Amortized Cost	$ 122,880	$ 158,686
Commercial Portfolio Segment | Commercial Loan
Gain (Loss) on Securities [Line Items]
Current Face	137,081	158,686
Premium (Discount)	(511)	(686)
Amortized Cost	136,570	158,000
Gross Unrealized Gains		686
Gross Unrealized Losses	(13,690)
Fair Value (3)	$ 122,880	$ 158,686
Weighted Average Coupon Rate	6.50%	6.82%
Weighted Average Yield	6.80%	7.17%
Weighted Average Life (in years)	2 years 7 months 2 days	1 year 11 months 1 day
Commercial Portfolio Segment | Loan G
Gain (Loss) on Securities [Line Items]
Current Face	$ 56,697	$ 45,856
Premium (Discount)	0	0
Amortized Cost	56,697	45,856
Gross Unrealized Gains		0
Gross Unrealized Losses	(3,941)
Fair Value (3)	$ 52,756	$ 45,856
Weighted Average Coupon Rate	5.27%	6.46%
Weighted Average Yield	5.27%	6.46%
Weighted Average Life (in years)	1 year 9 months 18 days	6 months 10 days
Commercial Portfolio Segment | Loan H
Gain (Loss) on Securities [Line Items]
Current Face		$ 36,000
Premium (Discount)		0
Amortized Cost		36,000
Gross Unrealized Gains		0
Fair Value (3)		$ 36,000
Weighted Average Coupon Rate		5.49%
Weighted Average Yield		5.49%
Weighted Average Life (in years)		2 months 8 days
Commercial Portfolio Segment | Loan I
Gain (Loss) on Securities [Line Items]
Current Face	$ 15,211	$ 11,992
Premium (Discount)	(173)	(184)
Amortized Cost	15,038	11,808
Gross Unrealized Gains		184
Gross Unrealized Losses	(826)
Fair Value (3)	$ 14,212	$ 11,992
Weighted Average Coupon Rate	11.50%	12.21%
Weighted Average Yield	12.00%	14.51%
Weighted Average Life (in years)	2 years 5 months 19 days	1 year 14 days
Commercial Portfolio Segment | Loan I | Subsequent Event
Gain (Loss) on Securities [Line Items]
Increase in capital commitment			$ 6,000
Commercial Portfolio Segment | Loan J
Gain (Loss) on Securities [Line Items]
Current Face		$ 4,674
Premium (Discount)		0
Amortized Cost		4,674
Gross Unrealized Gains		0
Fair Value (3)		$ 4,674
Weighted Average Coupon Rate		6.36%
Weighted Average Yield		6.36%
Weighted Average Life (in years)		2 years 1 month 13 days
Commercial Portfolio Segment | Loan K
Gain (Loss) on Securities [Line Items]
Current Face	$ 14,173	$ 9,164
Premium (Discount)	0	0
Amortized Cost	14,173	9,164
Gross Unrealized Gains		0
Gross Unrealized Losses	(1,100)
Fair Value (3)	$ 13,073	$ 9,164
Weighted Average Coupon Rate	10.00%	10.71%
Weighted Average Yield	11.00%	11.86%
Weighted Average Life (in years)	1 year 3 months 7 days	1 year 8 months 19 days
Commercial Portfolio Segment | Loan L
Gain (Loss) on Securities [Line Items]
Current Face	$ 51,000	$ 51,000
Premium (Discount)	(338)	(502)
Amortized Cost	50,662	50,498
Gross Unrealized Gains		502
Gross Unrealized Losses	(7,823)
Fair Value (3)	$ 42,839	$ 51,000
Weighted Average Coupon Rate	5.40%	6.16%
Weighted Average Yield	5.67%	6.50%
Weighted Average Life (in years)	3 years 10 months 9 days	4 years 7 months 17 days

Excess MSRs - Summary of Excess

Excess MSRs - Summary of Excess MSR portfolio (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Aug. 31, 2020
Disclosure of Excess MSRs [Line Items]
Unpaid Principal Balance	$ 681,941	$ 2,945,488
Amortized Cost	4,897	19,748
Gross Unrealized Gains		95
Gross Unrealized Losses	(1,371)	(2,068)
Fair Value	$ 3,526	$ 17,775
Weighted Average Yield	4.44%	8.42%
Weighted Average Life (Years)	5 years 8 months 4 days	5 years 6 months 29 days
Agency Excess MSRs
Disclosure of Excess MSRs [Line Items]
Unpaid Principal Balance	$ 652,756	$ 2,910,735	$ 3,100,000
Amortized Cost	4,725	19,570
Gross Unrealized Gains		93
Gross Unrealized Losses	(1,284)	(2,031)
Fair Value	$ 3,441	$ 17,632
Weighted Average Yield	3.97%	8.32%
Weighted Average Life (Years)	5 years 7 months 9 days	5 years 6 months 29 days
Credit Excess MSRs
Disclosure of Excess MSRs [Line Items]
Unpaid Principal Balance	$ 29,185	$ 34,753
Amortized Cost	172	178
Gross Unrealized Gains		2
Gross Unrealized Losses	(87)	(37)
Fair Value	$ 85	$ 143
Weighted Average Yield	23.56%	21.38%
Weighted Average Life (Years)	7 years 3 months 7 days	5 years 3 months

Excess MSRs - Narrative (Detail

Excess MSRs - Narrative (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Jun. 30, 2019
Disclosure of Excess MSRs [Line Items]
Proceeds from sales of excess MSRs		$ 8,500		$ 7,735	$ 0
Unpaid Principal Balance		$ 681,941		$ 681,941		$ 2,945,488
Loan securitization, ownership interest	45.00%	44.60%	44.60%	44.60%	44.60%		44.60%
Excess MSR, OTTI			$ 400		$ 2,600
Excess MSR, OTTI not recognized in a prior period					$ 800
Agency Excess MSRs
Disclosure of Excess MSRs [Line Items]
Proceeds from sales of excess MSRs	$ 18,900
Unpaid Principal Balance	3,100,000	$ 652,756		$ 652,756		$ 2,910,735
Net realized gain	100
Net realized losses	4,800
Agency Excess MSRs | AG Mortgage Investment Trust, Inc.
Disclosure of Excess MSRs [Line Items]
Proceeds from sales of excess MSRs	$ 8,500

Fair value measurements - Summa

Fair value measurements - Summary of financial instruments measured at fair value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets:
Residential mortgage loans	$ 429,648	$ 417,785
Commercial loans	122,880	158,686
Excess mortgage servicing rights	3,526	17,775
Cash equivalents		53,243
Derivative assets	0	2,282
AG Arc	41,436	28,546
Total Assets Measured at Fair Value	945,112	4,128,149
Liabilities:
Securitized debt	(358,986)	(224,348)
Derivative Liability	(39)	(411)
Total Liabilities Measured at Fair Value	(359,025)	(224,759)
Agency RMBS: 30 Year Fixed Rate
Assets:
Debt securities, available for sale	250,123	2,241,298
Agency RMBS: Interest Only
Assets:
Debt securities, available for sale		74,141
Non-Agency RMBS
Assets:
Debt securities, available for sale	42,959	716,396
Non-Agency RMBS Interest Only
Assets:
Debt securities, available for sale	312	1,074
CMBS
Assets:
Debt securities, available for sale	49,877	368,931
CMBS Interest Only
Assets:
Debt securities, available for sale	4,351	47,992
Level 1
Assets:
Residential mortgage loans	0	0
Commercial loans	0	0
Excess mortgage servicing rights	0	0
Cash equivalents		53,243
Derivative assets		0
AG Arc	0	0
Total Assets Measured at Fair Value	0	53,243
Liabilities:
Securitized debt	0	0
Derivative Liability	0	(122)
Total Liabilities Measured at Fair Value	0	(122)
Level 1 | Agency RMBS: 30 Year Fixed Rate
Assets:
Debt securities, available for sale	0	0
Level 1 | Agency RMBS: Interest Only
Assets:
Debt securities, available for sale		0
Level 1 | Non-Agency RMBS
Assets:
Debt securities, available for sale	0	0
Level 1 | Non-Agency RMBS Interest Only
Assets:
Debt securities, available for sale	0	0
Level 1 | CMBS
Assets:
Debt securities, available for sale	0	0
Level 1 | CMBS Interest Only
Assets:
Debt securities, available for sale	0	0
Level 2
Assets:
Residential mortgage loans	2,275	0
Commercial loans	0	0
Excess mortgage servicing rights	0	0
Cash equivalents		0
Derivative assets		2,282
AG Arc	0	0
Total Assets Measured at Fair Value	346,207	2,406,367
Liabilities:
Securitized debt	0	(151,933)
Derivative Liability	(39)	(289)
Total Liabilities Measured at Fair Value	(39)	(152,222)
Level 2 | Agency RMBS: 30 Year Fixed Rate
Assets:
Debt securities, available for sale	250,123	2,241,298
Level 2 | Agency RMBS: Interest Only
Assets:
Debt securities, available for sale		74,141
Level 2 | Non-Agency RMBS
Assets:
Debt securities, available for sale	39,269	86,281
Level 2 | Non-Agency RMBS Interest Only
Assets:
Debt securities, available for sale	312	0
Level 2 | CMBS
Assets:
Debt securities, available for sale	49,877	2,365
Level 2 | CMBS Interest Only
Assets:
Debt securities, available for sale	4,351	0
Level 3
Assets:
Residential mortgage loans	427,373	417,785
Commercial loans	122,880	158,686
Excess mortgage servicing rights	3,526	17,775
Cash equivalents		0
Derivative assets		0
AG Arc	41,436	28,546
Total Assets Measured at Fair Value	598,905	1,668,539
Liabilities:
Securitized debt	(358,986)	(72,415)
Derivative Liability	0	0
Total Liabilities Measured at Fair Value	(358,986)	(72,415)
Level 3 | Agency RMBS: 30 Year Fixed Rate
Assets:
Debt securities, available for sale	0	0
Level 3 | Agency RMBS: Interest Only
Assets:
Debt securities, available for sale		0
Level 3 | Non-Agency RMBS
Assets:
Debt securities, available for sale	3,690	630,115
Level 3 | Non-Agency RMBS Interest Only
Assets:
Debt securities, available for sale	0	1,074
Level 3 | CMBS
Assets:
Debt securities, available for sale	0	366,566
Level 3 | CMBS Interest Only
Assets:
Debt securities, available for sale	$ 0	$ 47,992

Fair value measurements - Sum_2

Fair value measurements - Summary of assets measured on a recurring basis (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)security	Sep. 30, 2020USD ($)security	Sep. 30, 2019USD ($)security
Total net gains/(losses)
Included in net income	$ 14,604	$ 4,299	$ (176,988)	$ 23,549
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	23,380	3,643	(20,677)	18,761
Non-Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	4,496	561,145	630,115	491,554
Transfers:
Transfers into level 3		55,311	0	88,511
Transfers out of level 3	0		(210,709)	(39,557)
Purchases/Transfers	0	72,933	1,559	213,495
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets	0	(23,630)	(362,199)	(72,872)
Proceeds from settlement	(954)	(13,578)	(11,823)	(41,451)
Total net gains/(losses)
Included in net income	148	1,876	(43,253)	14,377
Ending Balance	3,690	654,057	3,690	654,057
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	221	$ 106	$ (329)	$ 10,193
Non-Agency RMBS | Level 2
Total net gains/(losses)
Number of securities transferred | security			50	4
Non-Agency RMBS | Level 3
Total net gains/(losses)
Number of securities transferred | security		9		14
Non-Agency RMBS Interest Only
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		$ 1,834	$ 1,074	$ 3,099
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3			(1,074)	0
Purchases/Transfers		0	0	0
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets		0	0	0
Proceeds from settlement		0	0	0
Total net gains/(losses)
Included in net income		(412)	0	(1,677)
Ending Balance	0	1,422	0	1,422
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held		371	$ 0	(613)
Non-Agency RMBS Interest Only | Level 2
Total net gains/(losses)
Number of securities transferred | security			2
ABS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		20,571		21,160
Transfers:
Transfers into level 3		0		0
Transfers out of level 3				0
Purchases/Transfers		473		1,632
Issuances of Securitized Debt		0		0
Capital Contributions		0		0
Proceeds from sales of assets		0		(1,284)
Proceeds from settlement		(8,263)		(9,446)
Total net gains/(losses)
Included in net income		(489)		230
Ending Balance		12,292		12,292
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held		(489)		165
CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		220,225	$ 366,566	211,054
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3			(170,816)	(5,279)
Purchases/Transfers		39,095	3,540	82,540
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets		0	(148,111)	(20,165)
Proceeds from settlement		(5,777)	(9,367)	(28,711)
Total net gains/(losses)
Included in net income		4,419	(41,812)	18,523
Ending Balance	0	257,962	0	257,962
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held		4,356	$ 0	$ 15,089
CMBS | Level 2
Total net gains/(losses)
Number of securities transferred | security			32	2
CMBS Interest Only
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		46,836	$ 47,992	$ 50,331
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3			(22,055)	0
Purchases/Transfers		0	0	0
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets		(917)	(21,995)	(2,631)
Proceeds from settlement		0	0	0
Total net gains/(losses)
Included in net income		(976)	(3,942)	(2,757)
Ending Balance	0	44,943	0	44,943
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held		(925)	$ 0	(2,631)
CMBS Interest Only | Level 2
Total net gains/(losses)
Number of securities transferred | security			15
Residential Mortgage
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	379,822	199,970	$ 417,785	186,096
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3	(2,225)		0	0
Purchases/Transfers	60,100	181,053	536,710	207,048
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets	(6,151)	0	(393,559)	(12,780)
Proceeds from settlement	(11,436)	(6,364)	(50,563)	(14,553)
Total net gains/(losses)
Included in net income	7,263	4,718	(83,000)	13,566
Ending Balance	427,373	379,377	427,373	379,377
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	$ 9,778	4,651	(25,443)	12,643
Residential Mortgage | Level 2
Total net gains/(losses)
Number of securities transferred | security	2
Commercial Loan
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 127,685	118,005	158,686	98,574
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3	0		0	0
Purchases/Transfers	8,308	60,803	27,508	90,451
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets	(2,724)	0	(36,924)	0
Proceeds from settlement	(5,710)	(32,800)	(5,710)	(43,217)
Total net gains/(losses)
Included in net income	(4,679)	510	(20,680)	710
Ending Balance	122,880	146,518	122,880	146,518
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	0	510	(14,210)	710
Excess Mortgage Servicing Rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	12,294	20,893	17,775	26,650
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3	0		0	0
Purchases/Transfers	0	0	0	0
Issuances of Securitized Debt		0	0	0
Capital Contributions		0		0
Proceeds from sales of assets	(8,460)	0	(8,460)	0
Proceeds from settlement	0	0	0	0
Total net gains/(losses)
Included in net income	(308)	(2,738)	(5,789)	(8,495)
Ending Balance	3,526	18,155	3,526	18,155
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	3,298	(2,328)	(2,183)	(5,867)
AG Arc
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	28,030	18,717	28,546	20,360
Transfers:
Transfers into level 3		0	0	0
Transfers out of level 3	0		0	0
Purchases/Transfers	0	0	0	0
Issuances of Securitized Debt		0	0	0
Capital Contributions		11,148		17,837
Proceeds from sales of assets	0	0	0	0
Proceeds from settlement	0	0	0	0
Total net gains/(losses)
Included in net income	13,406	(2,594)	12,890	(10,926)
Ending Balance	41,436	27,271	41,436	27,271
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	13,406	(2,594)	12,890	(10,926)
Securitized Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(198,974)	(8,630)	(72,415)	(10,858)
Transfers:
Transfers into level 3		0	(151,933)	0
Transfers out of level 3	0		7,230	0
Purchases/Transfers	0	0	0	0
Issuances of Securitized Debt	(163,487)	(65,171)	(166,487)	(65,171)
Capital Contributions		0		0
Proceeds from sales of assets	0	0	0	0
Proceeds from settlement	6,798	630	16,021	2,845
Total net gains/(losses)
Included in net income	(3,323)	(15)	8,598	(2)
Ending Balance	(358,986)	(73,186)	(358,986)	(73,186)
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	$ (3,323)	$ (15)	$ 8,598	$ (2)
Securitized Debt | Level 2
Total net gains/(losses)
Number of securities transferred | security			1
Securitized Debt | Level 3
Total net gains/(losses)
Number of securities transferred | security			1

Fair value measurements - Sum_3

Fair value measurements - Summary of gains/(losses) recorded in the statement of operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Included in net income	$ 14,604	$ 4,299	$ (176,988)	$ 23,549
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	23,380	3,643	(20,677)	18,761
Unrealized gain/(loss) on real estate securities and loans, net
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Included in net income	13,206	8,758	(74,309)	38,503
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	9,999	8,580	(39,982)	35,556
Unrealized gain/(loss) on derivative and other instruments, net
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Included in net income	(3,631)	(2,753)	2,809	(8,497)
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	(25)	(2,343)	6,415	(5,869)
Net realized gain/(loss)
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Included in net income	(8,377)	888	(118,378)	4,469
Equity in earnings/(loss) from affiliates
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Included in net income	13,406	(2,594)	12,890	(10,926)
Change in unrealized appreciation/(depreciation) for level 3 assets/liabilities still held	$ 13,406	$ (2,594)	$ 12,890	$ (10,926)

Fair value measurements - Sum_4

Fair value measurements - Summary of valuation techniques (Details) $ in Thousands	Sep. 30, 2020USD ($)$ / shares	Dec. 31, 2019USD ($)$ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, fair value	$ 347,622	$ 3,449,832
Level 3 | Discounted Cash Flow | Non-Agency RMBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, fair value	$ 2,315	$ 625,537
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0828	0.0171
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0828	1
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0828	0.0599
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0558	0
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0558	1
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0558	0.1460
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Collateral Losses | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0579	0
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Collateral Losses | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0579	1
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Collateral Losses | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	0.0579	0.0293
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Loss Severity | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	(0.0573)	0
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Loss Severity | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	(0.0573)	1
Level 3 | Discounted Cash Flow | Non-Agency RMBS | Measurement Input, Loss Severity | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input	(0.0573)	0.2137
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, fair value		$ 1,074
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.2750
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.2750
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.2750
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.1800
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.1800
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.1800
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Collateral Losses | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.0200
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Collateral Losses | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.0200
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Collateral Losses | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.0200
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Loss Severity | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.3500
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Loss Severity | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.3500
Level 3 | Discounted Cash Flow | Non-Agency RMBS Interest Only | Measurement Input, Loss Severity | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.3500
Level 3 | Discounted Cash Flow | CMBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, fair value		$ 366,566
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0.1389
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0.0633
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Collateral Losses | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Collateral Losses | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Collateral Losses | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Loss Severity | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Loss Severity | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS | Measurement Input, Loss Severity | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input		0
Level 3 | Discounted Cash Flow | CMBS Interest Only
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, fair value		$ 47,992
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		(0.0257)
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.0986
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.0419
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.9900
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		1
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0.9993
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Collateral Losses | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Collateral Losses | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Collateral Losses | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Loss Severity | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Loss Severity | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0
Level 3 | Discounted Cash Flow | CMBS Interest Only | Measurement Input, Loss Severity | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, interest only, measurement input		0
Level 3 | Discounted Cash Flow | Residential Mortgage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 420,304	$ 364,107
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0550	0.0400
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.1000	0.0825
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0663	0.0481
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0352	0.0481
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.1011	0.0904
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0774	0.0778
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Collateral Losses | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0184	0.0164
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Collateral Losses | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0933	0.0494
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Collateral Losses | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.0275	0.0236
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Loss Severity | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	(0.0856)	(0.0732)
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Loss Severity | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.4607	0.3691
Level 3 | Discounted Cash Flow | Residential Mortgage | Measurement Input, Loss Severity | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.2168	0.2315
Level 3 | Discounted Cash Flow | Commercial Loan
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 122,880	$ 60,164
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.1122	0.0616
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.1830	0.1076
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	0.1282	0.0686
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Credit Spread | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	10.26	0.0440
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Credit Spread | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	16.47	0.0900
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Credit Spread | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	11.70	0.0510
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Recovery Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	1	1
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Recovery Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	1	1
Level 3 | Discounted Cash Flow | Commercial Loan | Measurement Input, Recovery Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	1	1
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, fair value	$ 3,440	$ 17,633
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.0900	0.0850
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.0970	0.1160
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.0908	0.0920
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.1265	0.0935
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.1620	0.1690
Level 3 | Discounted Cash Flow | Excess Mortgage Servicing Rights | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.1421	0.1236
Level 3 | Discounted Cash Flow | Securitized debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, fair value	$ (358,986)	$ (72,415)
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0302	0.0298
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0650	0.0470
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Discount Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0357	0.0354
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0613	0.1000
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0868	0.1004
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Prepayment Rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0752	0.1004
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Collateral Losses | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0217	0.0204
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Collateral Losses | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0318	0.0350
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Collateral Losses | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0263	0.0219
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Loss Severity | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.1688	0.2013
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Loss Severity | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.2148	0.4500
Level 3 | Discounted Cash Flow | Securitized debt | Measurement Input, Loss Severity | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.1939	0.2261
Level 3 | Recent Transaction | Residential Mortgage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value		$ 53,678
Level 3 | Consensus Pricing | Non-Agency RMBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, fair value	$ 1,375	$ 4,578
Level 3 | Consensus Pricing | Non-Agency RMBS | Measurement Input, Offered Price | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input | $ / shares	89	100
Level 3 | Consensus Pricing | Non-Agency RMBS | Measurement Input, Offered Price | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input | $ / shares	89	100
Level 3 | Consensus Pricing | Non-Agency RMBS | Measurement Input, Offered Price | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, measurement input | $ / shares	89	100
Level 3 | Consensus Pricing | Residential Mortgage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 7,069
Level 3 | Consensus Pricing | Residential Mortgage | Measurement Input, Offered Price | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input | $ / shares	67.30
Level 3 | Consensus Pricing | Residential Mortgage | Measurement Input, Offered Price | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input | $ / shares	105.84
Level 3 | Consensus Pricing | Residential Mortgage | Measurement Input, Offered Price | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input | $ / shares	98.59
Level 3 | Consensus Pricing | Commercial Loan
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value		$ 98,522
Level 3 | Consensus Pricing | Commercial Loan | Measurement Input, Offered Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input | $ / shares		100
Level 3 | Consensus Pricing | Commercial Loan | Measurement Input, Offered Price | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input | $ / shares		100
Level 3 | Consensus Pricing | Commercial Loan | Measurement Input, Offered Price | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input | $ / shares		100
Level 3 | Consensus Pricing | Excess Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, fair value	$ 86	$ 142
Level 3 | Consensus Pricing | Excess Mortgage Servicing Rights | Measurement Input, Offered Price | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input | $ / shares	0.29	0.01
Level 3 | Consensus Pricing | Excess Mortgage Servicing Rights | Measurement Input, Offered Price | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input | $ / shares	0.29	0.40
Level 3 | Consensus Pricing | Excess Mortgage Servicing Rights | Measurement Input, Offered Price | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input | $ / shares	0.29	0.40
Level 3 | Comparable Multiple | AG Arc
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 41,436	$ 28,546
Level 3 | Comparable Multiple | AG Arc | Measurement Input, Book Value Multiple | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	1	1
Level 3 | Comparable Multiple | AG Arc | Measurement Input, Book Value Multiple | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	1	1
Level 3 | Comparable Multiple | AG Arc | Measurement Input, Book Value Multiple | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, measurement input	1	1

Financing arrangements - Summar

Financing arrangements - Summary of financing arrangements (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Repurchase Agreement Disclosure [Line Items]
Financing arrangements	$ 225,504	$ 3,233,468
Revolving facilities
Repurchase Agreement Disclosure [Line Items]
Debt instrument, borrowing capacity, amount	61,200	111,502
Net Amounts Of Liabilities Presented In The Consolidated Balance Sheet
Repurchase Agreement Disclosure [Line Items]
Repurchase agreements	$ 164,304	$ 3,121,966

Financing arrangements - Summ_2

Financing arrangements - Summary of repurchase agreements (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 2,987,355,000
Weighted  Average Rate		2.25%
Weighted  Average Haircut		8.50%
Fair Value  Pledged		$ 3,328,683,000
Amortized  Cost		3,210,497,000
Accrued  Interest		10,841,000
Residential Mortgage Loans
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 131,594,000
Weighted  Average Rate		3.53%
Weighted Average Funding Cost		3.68%
Weighted  Average Haircut		22.00%
Fair Value  Pledged		$ 171,224,000
Amortized  Cost		160,601,000
Accrued  Interest		820,000
Commercial Loan
Assets Sold under Agreements to Repurchase [Line Items]
Balance	$ 0
30 days or less
Assets Sold under Agreements to Repurchase [Line Items]
Balance	$ 140,386,000	$ 1,550,508,000
Weighted  Average Rate	0.94%	2.33%
Weighted  Average Haircut	15.40%	9.00%
Fair Value  Pledged	$ 174,449,000	$ 1,728,837,000
Amortized  Cost	182,292,000	1,660,649,000
Accrued  Interest	483,000	5,402,000
31-60 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 1,362,121,000
Weighted  Average Rate		2.13%
Weighted  Average Haircut		7.00%
Fair Value  Pledged		$ 1,501,850,000
Amortized  Cost		1,453,257,000
Accrued  Interest		5,191,000
31-60 days | Residential Mortgage Loans
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 24,584,000
Weighted  Average Rate		3.14%
Weighted Average Funding Cost		3.14%
Weighted  Average Haircut		33.70%
Fair Value  Pledged		$ 37,546,000
Amortized  Cost		25,192,000
Accrued  Interest		377,000
61-90 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 71,753,000
Weighted  Average Rate		2.99%
Weighted  Average Haircut		23.50%
Fair Value  Pledged		$ 93,957,000
Amortized  Cost		92,901,000
Accrued  Interest		245,000
61-90 days | Residential Mortgage Loans
Assets Sold under Agreements to Repurchase [Line Items]
Balance	$ 23,918,000
Weighted  Average Rate	4.10%
Weighted Average Funding Cost	4.10%
Weighted  Average Haircut	42.70%
Fair Value  Pledged	$ 45,019,000
Amortized  Cost	44,017,000
Accrued  Interest	$ 704,000
Greater than 180 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 2,973,000
Weighted  Average Rate		3.79%
Weighted  Average Haircut		23.70%
Fair Value  Pledged		$ 4,039,000
Amortized  Cost		3,690,000
Accrued  Interest		3,000
Greater than 180 days | Residential Mortgage Loans
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 107,010,000
Weighted  Average Rate		3.61%
Weighted Average Funding Cost		3.80%
Weighted  Average Haircut		19.30%
Fair Value  Pledged		$ 133,678,000
Amortized  Cost		135,409,000
Accrued  Interest		443,000
Greater than 180 days | Commercial Loan
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 3,017,000
Weighted  Average Rate		4.46%
Weighted Average Funding Cost		5.89%
Weighted  Average Haircut		35.40%
Fair Value  Pledged		$ 4,674,000
Amortized  Cost		4,674,000
Accrued  Interest		$ 26,000

Financing arrangements - Summ_3

Financing arrangements - Summary of securities collateral information (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Fair Value of investments pledged as collateral under repurchase agreements
Cash pledged (i.e., restricted cash) under repurchase agreements	$ 38,000	$ 11,565,000
Total collateral pledged under repurchase agreements	219,506,000	3,516,146,000
Collateral Posted Under Repurchase Agreements	0
Agency RMBS
Fair Value of investments pledged as collateral under repurchase agreements
Fair Value of investments pledged as collateral under repurchase agreements	107,252,000	2,231,933,000
Non-Agency RMBS
Fair Value of investments pledged as collateral under repurchase agreements
Fair Value of investments pledged as collateral under repurchase agreements	26,711,000	682,828,000
CMBS
Fair Value of investments pledged as collateral under repurchase agreements
Fair Value of investments pledged as collateral under repurchase agreements	40,486,000	413,922,000
US Treasury Securities
Fair Value of investments pledged as collateral under repurchase agreements
Collateral Posted Under Repurchase Agreements		1,100,000
Residential Mortgage Loans
Fair Value of investments pledged as collateral under repurchase agreements
Fair Value of investments pledged as collateral under repurchase agreements	45,019,000	171,224,000
Commercial Loan
Fair Value of investments pledged as collateral under repurchase agreements
Fair Value of investments pledged as collateral under repurchase agreements	$ 0	$ 4,674,000

Financing arrangements - Summ_4

Financing arrangements - Summary of total borrowings under repurchase agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Agency RMBS
Schedule Of Total Borrowings Under Repurchase Agreements [Line Items]
Gross Liability for repurchase agreements	$ 101,284	$ 2,109,278
Non-Agency RMBS
Schedule Of Total Borrowings Under Repurchase Agreements [Line Items]
Gross Liability for repurchase agreements	15,597	565,450
CMBS
Schedule Of Total Borrowings Under Repurchase Agreements [Line Items]
Gross Liability for repurchase agreements	23,505	312,627
Residential Mortgage Loans
Schedule Of Total Borrowings Under Repurchase Agreements [Line Items]
Gross Liability for repurchase agreements	23,918	131,594
Commercial Loan
Schedule Of Total Borrowings Under Repurchase Agreements [Line Items]
Gross Liability for repurchase agreements	0	3,017
Gross Amounts of Recognized Liabilities
Schedule Of Total Borrowings Under Repurchase Agreements [Line Items]
Gross Liability for repurchase agreements	$ 164,304	$ 3,121,966

Financing arrangements - Summ_5

Financing arrangements - Summary of term loan and revolving facilities (Details) - Revolving Credit Facility - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Balance	$ 61,200,000	$ 111,502,000
Net Carrying Value of Assets Pledged as Collateral	95,595,000	$ 160,332,000
Maximum Aggregate Borrowing Capacity	$ 100,000,000
Revolving Credit Facility B
Debt Instrument [Line Items]
Rate	0.00%	3.80%
Funding Cost	0.00%	3.80%
Balance	$ 0	$ 21,546,000
Net Carrying Value of Assets Pledged as Collateral	0	$ 27,476,000
Maximum Aggregate Borrowing Capacity	$ 0
Revolving Credit Facility C
Debt Instrument [Line Items]
Rate	2.31%	3.85%
Funding Cost	2.79%	4.01%
Balance	$ 61,200,000	$ 89,956,000
Net Carrying Value of Assets Pledged as Collateral	95,595,000	$ 132,856,000
Maximum Aggregate Borrowing Capacity	$ 100,000,000

Financing arrangements - Narrat

Financing arrangements - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)counterparty	Dec. 31, 2019counterparty
Debt Disclosure [Abstract]
Cash pledged as collateral | $	$ 0.4
Number of counterparties with outstanding debt | counterparty	6	30

Financing arrangements - Summ_6

Financing arrangements - Summary of repurchase agreement counterparty (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Credit Suisse AG, Cayman Islands Branch
Repurchase Agreement Counterparty [Line Items]
Stockholders’ Equity at Risk	$ 38,385
Weighted Average Maturity (days)	43 days
Percentage of Stockholders’ Equity	9.80%
Barclays Capital Inc
Repurchase Agreement Counterparty [Line Items]
Stockholders’ Equity at Risk		$ 77,334
Weighted Average Maturity (days)		277 days
Percentage of Stockholders’ Equity		9.10%
Citigroup Global Markets Inc.
Repurchase Agreement Counterparty [Line Items]
Stockholders’ Equity at Risk		$ 50,263
Weighted Average Maturity (days)		22 days
Percentage of Stockholders’ Equity		5.90%

Other assets and liabilities -

Other assets and liabilities - Summary of other assets and liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other assets
Interest receivable	$ 3,265	$ 13,548
Derivative assets, at fair value	0	2,282
Other assets	5,382	4,378
Due from broker	512	1,697
Total Other assets	9,159	21,905
Other liabilities
Interest payable	654	10,941
Derivative liabilities, at fair value	39	411
Due to affiliates	13,766	5,226
Accrued expenses	4,351	6,175
Taxes payable	0	815
Due to broker	2,134	1,107
Other liabilities	$ 20,944	$ 24,675

Other assets and liabilities _2

Other assets and liabilities - Summary of Company's derivatives and other instruments and their balance sheet location (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative assets, at fair value	$ 0	$ 199,000
Derivative liabilities, at fair value	(39,000)	(411,000)
Derivative liability, reduction in fair value related to variation margin	13,900	2,200,000
Derivative asset, reduction in fair value related to variation margin	200,000	10,800,000
Swaption
Derivatives, Fair Value [Line Items]
Derivative assets, at fair value	0	2,083,000
British Pound Futures
Derivatives, Fair Value [Line Items]
Derivative liability, reduction in fair value related to variation margin	$ 27,300	100,000
Euro Future
Derivatives, Fair Value [Line Items]
Derivative liability, reduction in fair value related to variation margin		$ 19,700

Other assets and liabilities _3

Other assets and liabilities - Summary of information related to derivatives and other instruments (Details)	Sep. 30, 2020USD ($)	Sep. 30, 2020GBP (£)	Sep. 30, 2020EUR (€)	Dec. 31, 2019USD ($)
Derivative [Line Items]
Notional amount	$ 180,000,000			$ 1,848,750,000
British Pound Futures
Derivative [Line Items]
Notional amount | £		£ 62,500
Euro Future
Derivative [Line Items]
Notional amount | €			€ 125,000
Long | Interest Rate Swap | United States of America, Dollars
Derivative [Line Items]
Notional amount	180,000,000			1,848,750,000
Notional amount of Swaptions | Long | United States of America, Dollars
Derivative [Line Items]
Notional amount	0			650,000,000
British Pound Futures | Short | United Kingdom, Pounds
Derivative [Line Items]
Notional amount	3,000,000			6,563,000
Euro Future | Short | Euro Member Countries, Euro
Derivative [Line Items]
Notional amount	$ 0			$ 1,500,000

Other assets and liabilities _4

Other assets and liabilities - Summary of gains/(losses) related to derivatives and other instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	$ 1,164	$ 4,107	$ (10,915)	$ (15,284)
Included within Net realized gain/(loss)	(1,159)	(17,218)	(62,721)	(58,665)
Total income/(loss)	5	(13,111)	(73,636)	(73,949)
US Treasury Futures
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	0	(37)	0	(181)
Included within Net realized gain/(loss)	0	(510)	0	(139)
British Pound Futures
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	(57)	31	129	31
Included within Net realized gain/(loss)	(108)	(138)	406	(138)
Euro Future
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	0	0	20	0
Included within Net realized gain/(loss)	0	0	68	0
TBAs
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	0	(1,307)	0	(866)
Included within Net realized gain/(loss)	0	1,152	4,610	2,753
US Treasury Securities
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	0	0	0	82
Included within Net realized gain/(loss)	0	231	0	(18)
Swaption
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	1,051	531	354	(243)
Included within Net realized gain/(loss)	(1,051)	0	(2,437)	(861)
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	170	4,656	(11,418)	(15,108)
Included within Net realized gain/(loss)	0	(18,060)	(65,368)	(59,140)
Eurodollar Future
Derivative Instruments, Gain (Loss) [Line Items]
Included within Unrealized gain/(loss) on derivative and other instruments, net	0	233	0	1,001
Included within Net realized gain/(loss)	$ 0	$ 107	$ 0	$ (1,122)

Other assets and liabilities _5

Other assets and liabilities - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Pledged real estate securities, fair value		$ 3
Cash as collateral for certain derivatives	$ 3.1	32.1
Cash pledged as collateral against derivatives related to variation margin	$ 0.2	$ 8.5

Other assets and liabilities _6

Other assets and liabilities - Summary of interest rate derivatives (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 180,000,000	$ 1,848,750,000
Weighted Average Pay-Fixed Rate	0.42%	1.60%
Weighted Average Receive-Variable Rate	0.13%	1.91%
Weighted Average Years to Maturity	6 years 2 months 4 days	4 years 3 months 25 days
2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 136,000,000
Weighted Average Pay-Fixed Rate	0.34%
Weighted Average Receive-Variable Rate	0.13%
Weighted Average Years to Maturity	4 years 11 months 12 days
2030
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 44,000,000
Weighted Average Pay-Fixed Rate	0.68%
Weighted Average Receive-Variable Rate	0.12%
Weighted Average Years to Maturity	9 years 11 months 15 days
2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount		$ 105,000,000
Weighted Average Pay-Fixed Rate		1.54%
Weighted Average Receive-Variable Rate		1.91%
Weighted Average Years to Maturity		2 months 12 days
2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount		$ 743,000,000
Weighted Average Pay-Fixed Rate		1.64%
Weighted Average Receive-Variable Rate		1.91%
Weighted Average Years to Maturity		2 years 8 months 4 days
2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount		$ 5,750,000
Weighted Average Pay-Fixed Rate		3.19%
Weighted Average Receive-Variable Rate		1.91%
Weighted Average Years to Maturity		3 years 10 months 6 days
2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount		$ 650,000,000
Weighted Average Pay-Fixed Rate		1.52%
Weighted Average Receive-Variable Rate		1.90%
Weighted Average Years to Maturity		4 years 9 months 18 days
2026
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount		$ 180,000,000
Weighted Average Pay-Fixed Rate		1.50%
Weighted Average Receive-Variable Rate		1.89%
Weighted Average Years to Maturity		6 years 8 months 12 days
2029
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount		$ 165,000,000
Weighted Average Pay-Fixed Rate		1.77%
Weighted Average Receive-Variable Rate		1.94%
Weighted Average Years to Maturity		9 years 10 months 6 days

Other assets and liabilities _7

Other assets and liabilities - Summary of TBAs (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
To Be Announced Securities [Roll Forward]
Beginning Notional Amount		$ 1,848,750,000
Ending Net Notional Amount		180,000,000
Net Receivable/(Payable) from/to Broker		512,000		$ 1,697,000
Net Receivable/(Payable) from/to Broker		(2,134,000)		(1,107,000)
Derivative Asset		0		2,282,000
Derivative Liability		(39,000)		$ (411,000)
TBAs | Long
To Be Announced Securities [Roll Forward]
Beginning Notional Amount	$ 125,000,000	0	$ 0
Buys or Covers	475,000,000	728,000,000	1,869,500,000
Sales or Shorts	(450,000,000)	(728,000,000)	(1,719,500,000)
Ending Net Notional Amount	150,000,000	0	150,000,000
Net Fair Value as of Period End	153,175,000	0	153,175,000
Net Receivable/(Payable) from/to Broker		0
Net Receivable/(Payable) from/to Broker	(154,042,000)		(154,042,000)
Derivative Asset	386,000	0	386,000
Derivative Liability	(1,253,000)	$ 0	(1,253,000)
TBAs | Short
To Be Announced Securities [Roll Forward]
Beginning Notional Amount	100,000,000		0
Buys or Covers	300,000,000		485,000,000
Sales or Shorts	(200,000,000)		(485,000,000)
Ending Net Notional Amount	0		0
Net Fair Value as of Period End	0		0
Net Receivable/(Payable) from/to Broker	0		0
Derivative Asset	0		0
Derivative Liability	$ 0		$ 0

Earnings per share - Summary of

Earnings per share - Summary of outstanding warrants and unvested restricted stock units (Details) - shares	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Class of Warrant or Right [Line Items]
Unvested restricted stock units previously granted to the Manager (in shares)	36,121,000	32,742,000
Restricted Stock Units (RSUs) | Manager
Class of Warrant or Right [Line Items]
Unvested restricted stock units previously granted to the Manager (in shares)	0		20,000

Earnings per share - Summary _2

Earnings per share - Summary of earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 20,046	$ 11,106	$ (462,271)	$ 61,166
Gain on Exchange Offer, net	539	0	539	0
Dividends on preferred stock	(5,563)	(3,720)	(16,897)	(10,455)
Net income/(loss) from continuing operations available to common stockholders	15,022	7,386	(478,629)	50,711
Net Income/(Loss) from Discontinued Operations	0	(1,057)	361	(3,284)
Net income/(loss) available to common stockholders	$ 15,022	$ 6,329	$ (478,268)	$ 47,427
Denominator:
Basic weighted average common shares outstanding (in shares)	34,422	32,736	33,347	32,007
Dilutive effect of restricted stock units (in shares)	0	12	0	9
Diluted weighted average common shares outstanding (in shares)	34,422	32,748	33,347	32,016
Earnings/(Loss) Per Share - Basic
Continuing Operations (in dollars per share)	$ 0.44	$ 0.22	$ (14.35)	$ 1.58
Discontinued Operations (in dollars per share)	0	(0.03)	0.01	(0.10)
Total Earnings/(Loss) Per Share of Common Stock (in dollars per share)	0.44	0.19	(14.34)	1.48
Earnings/(Loss) Per Share - Diluted
Continuing Operations (in dollars per share)	0.44	0.22	(14.35)	1.58
Discontinued Operations (in dollars per share)	0	(0.03)	0.01	(0.10)
Total Earnings/(Loss) Per Share of Common Stock (in dollars per share)	$ 0.44	$ 0.19	$ (14.34)	$ 1.48

Earnings per share - Narrative

Earnings per share - Narrative (Details) - $ / shares	Sep. 17, 2019	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 06, 2020
Subsequent Event
Class of Warrant or Right [Line Items]
Decrease in book value (in dollars per share)					$ 0.31
8.25% Series A Cumulative Redeemable Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock dividend percentage			8.25%
8.25% Series A Cumulative Redeemable Preferred Stock | Subsequent Event
Class of Warrant or Right [Line Items]
Dividends payable (in dollars per share)					1.54689
8.00% Series B Cumulative Redeemable Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock dividend percentage			8.00%
8.00% Series B Cumulative Redeemable Preferred Stock | Subsequent Event
Class of Warrant or Right [Line Items]
Dividends payable (in dollars per share)					1.50
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Class of Warrant or Right [Line Items]
Preferred stock dividend percentage	8.00%	8.00%	8.00%	8.00%
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Subsequent Event
Class of Warrant or Right [Line Items]
Dividends payable (in dollars per share)					$ 1.50

Earnings per share - Dividends

Earnings per share - Dividends in Arrears (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 17, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Amount of Preferred Dividend in Arrears		$ 5,600	$ 400	$ 11,231	$ 400
8.25% Series A Cumulative Redeemable Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend percentage				8.25%
Dividend Per Preferred Share in Arrears				$ 1.03126
Amount of Preferred Dividend in Arrears				$ 2,091
8.00% Series B Cumulative Redeemable Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend percentage				8.00%
Dividend Per Preferred Share in Arrears				$ 1
Amount of Preferred Dividend in Arrears				$ 4,569
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend percentage	8.00%		8.00%	8.00%	8.00%
Dividend Per Preferred Share in Arrears				$ 1
Amount of Preferred Dividend in Arrears				$ 4,571

Earnings per share - Summary _3

Earnings per share - Summary of common stock dividends (Details) - $ / shares	Sep. 06, 2019	Jun. 14, 2019	Mar. 15, 2019	Sep. 06, 2019
Earnings Per Share [Abstract]
Dividends Declared Per Share (in dollars per share)	$ 0.45	$ 0.50	$ 0.50	$ 1.45

Earnings per share - Summary _4

Earnings per share - Summary of preferred stock dividends (Details) - $ / shares	Feb. 14, 2020	Sep. 17, 2019	Aug. 16, 2019	May 17, 2019	Feb. 15, 2019	Aug. 16, 2018	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
8.25% Series A Cumulative Redeemable Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend percentage								8.25%
Dividends Declared Per Share (in dollars per share)	$ 0.51563			$ 0.51563	$ 0.51563	$ 0.51563
8.00% Series B Cumulative Redeemable Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend percentage								8.00%
Dividends Declared Per Share (in dollars per share)	0.50		$ 0.50		0.50	$ 0.50
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend percentage		8.00%					8.00%	8.00%	8.00%
Dividends Declared Per Share (in dollars per share)	$ 0.50		$ 0	$ 0	$ 0

Income taxes (Details)

Income taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Excise tax expense	$ 0	$ 200,000	$ (800,000)	$ 500,000

Related party transactions (Det

Related party transactions (Details)	Sep. 24, 2020USD ($)shares	Aug. 31, 2020USD ($)$ / shares	Apr. 15, 2020shares	Aug. 23, 2019USD ($)	Mar. 28, 2019USD ($)	Aug. 29, 2017USD ($)	Sep. 30, 2020USD ($)securityshares	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)securityshares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jul. 31, 2020USD ($)	Jun. 19, 2020numberOfDirectors	Jun. 18, 2020numberOfDirectors	Apr. 10, 2020USD ($)	Mar. 31, 2020USD ($)	Mar. 25, 2020numberOfDirectors	Mar. 24, 2020numberOfDirectors	Feb. 29, 2020USD ($)	Nov. 30, 2019USD ($)	Oct. 31, 2019USD ($)	Jul. 31, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)
Related Party Transaction [Line Items]
Management fee percentage							1.50%		1.50%
Management fee to affiliate							$ 1,698,000	$ 2,346,000	$ 5,525,000	$ 7,091,000
Management fee payable							1,200,000		1,200,000		$ 2,700,000
Value of shares issued for services (in dollars per share) | $ / shares		$ 3.15
Other operating expenses							5,929,000	6,062,000	11,253,000	13,650,000
Reimbursement of expenses							$ 2,300,000	$ 1,600,000	$ 6,200,000	$ 5,500,000
Director's fee												$ 160,000
Percentage of director's fees paid in cash												50.00%
Percentage of director's fees paid in restricted common stock												50.00%
Number of independent directors | numberOfDirectors														3	4			4	5
Loan securitization, ownership interest		45.00%					44.60%	44.60%	44.60%	44.60%														44.60%
Number of states in which entity operates | security							50		50
Fees paid to asset manager							$ 600,000	$ 100,000	$ 2,100,000	$ 400,000
Investments in debt and equity of affiliates							138,689,000		138,689,000		156,311,000
Proceeds from sales of excess MSRs							8,500,000		7,735,000	0
Unpaid Principal Balance							681,941,000		681,941,000		2,945,488,000
Base Management Fee Q3 2020
Related Party Transaction [Line Items]
Management fee payable	$ 500,000
Base Management Fee Q3 2020 | Common Stock
Related Party Transaction [Line Items]
Stock issued for services (in shares) | shares	154,500
Reimbursement To Manager
Related Party Transaction [Line Items]
Due to related parties							2,200,000		2,200,000		2,500,000
Agency Excess MSRs
Related Party Transaction [Line Items]
Proceeds from sales of excess MSRs		$ 18,900,000
Unpaid Principal Balance		3,100,000,000					$ 652,756,000		$ 652,756,000		2,910,735,000
LOTS I
Related Party Transaction [Line Items]
Loan securitization, ownership interest							47.50%		47.50%
LOTS II
Related Party Transaction [Line Items]
Loan securitization, ownership interest							50.00%		50.00%
October 2019 Selling Affiliates
Related Party Transaction [Line Items]
Investments in debt and equity of affiliates																						$ 2,200,000
March 2019 Selling Affiliate
Related Party Transaction [Line Items]
Investments in debt and equity of affiliates																									$ 900,000
July 2019 Selling Affiliate
Related Party Transaction [Line Items]
Investments in debt and equity of affiliates																							$ 2,000,000
July 2020 Selling Affiliates
Related Party Transaction [Line Items]
Investments in debt and equity of affiliates													$ 1,900,000
Non-Qualified Mortgage Loans
Related Party Transaction [Line Items]
Loan securitization, fair value		226,000,000					$ 226,000,000	415,100,000	$ 226,000,000	415,100,000										$ 348,200,000	$ 322,100,000			$ 408,000,000
Senior Tranches
Related Party Transaction [Line Items]
Loan securitization, fair value							24,300,000	28,700,000	24,300,000	28,700,000	21,400,000						$ 26,600,000							$ 42,900,000
AG Arc LLC
Related Party Transaction [Line Items]
Excess MSRs, fair value							3,900,000		3,900,000		18,200,000
AG Arc LLC | Non-Qualified Mortgage Loans
Related Party Transaction [Line Items]
Loan balances							4,600,000		4,600,000
Mortgage Acquisition Trust
Related Party Transaction [Line Items]
The total amount committed under the long-term purchase commitment for the entity and its affiliates.				$ 105,000,000	$ 100,000,000	$ 75,000,000
Increase in amount committed under long term purchase commitment				$ 5,000,000	$ 25,000,000
ARC Home LLC
Related Party Transaction [Line Items]
Sourcing fees							$ 42,000	$ 100,000	$ 200,000	$ 200,000
AG Mortgage Investment Trust, Inc. | Agency Excess MSRs
Related Party Transaction [Line Items]
Proceeds from sales of excess MSRs		$ 8,500,000
Minimum
Related Party Transaction [Line Items]
Increase in directors fees											15,000
Maximum
Related Party Transaction [Line Items]
Increase in directors fees											$ 25,000
Manager
Related Party Transaction [Line Items]
Shares of restricted common stock under equity incentive plans (in shares) | shares									40,250
Manager | Note | Senior Notes
Related Party Transaction [Line Items]
Fixed rate debt																$ 10,000,000
Rate																6.00%
Restricted Stock | Director
Related Party Transaction [Line Items]
Shares of restricted common stock under equity incentive plans (in shares) | shares									204,688
Restricted Stock | Manager
Related Party Transaction [Line Items]
Shares of restricted common stock under equity incentive plans (in shares) | shares									120,000
Manager Equity Incentive Plan
Related Party Transaction [Line Items]
Shares of common stock company can award (in shares) | shares			2,000,000
Shares available to be awarded under equity incentive plans (in shares) | shares							1,901,106		1,901,106
Manager Equity Incentive Plan | Maximum
Related Party Transaction [Line Items]
Value of shares granted in fiscal year									$ 300,000

Equity (Details)

Equity (Details)	Oct. 02, 2020shares	Sep. 30, 2020USD ($)security$ / sharesshares	Sep. 24, 2020USD ($)shares	Aug. 14, 2020shares	Sep. 17, 2019USD ($)$ / sharesshares	Feb. 14, 2019USD ($)$ / sharesshares	May 05, 2017USD ($)	Sep. 30, 2020USD ($)security$ / sharesshares	Sep. 30, 2019USD ($)shares	Sep. 30, 2020USD ($)security$ / sharesshares	Sep. 30, 2019USD ($)shares	Dec. 31, 2011$ / sharesshares	Sep. 30, 2020USD ($)security$ / sharesshares	Nov. 06, 2020$ / shares	Aug. 31, 2020$ / shares	Dec. 31, 2019USD ($)shares	May 02, 2018USD ($)	Nov. 03, 2015USD ($)
Class of Stock [Line Items]
Securities and capital available for issuance | $		$ 591,200,000						$ 591,200,000		$ 591,200,000			$ 591,200,000				$ 750,000,000
Number of units in private placement (in shares)						3,000,000
Gross proceeds received from issuance of preferred stock | $					$ 115,000,000
Net proceeds from issuance of preferred stock | $										$ 0	$ 111,183,000
Quarterly periods required to grant preferred stock voting rights | security		6						6		6			6
Percent of votes needed to pass		66.67%						66.67%		66.67%			66.67%
Authorized amount for stock repurchase | $																		$ 25,000,000
Shares repurchased (in shares)								0	0	0	0
Net proceeds from issuance of common stock | $						$ 57,400,000		$ 5,485,000		$ 8,984,000	$ 66,063,000
Additional units sold in public offering (in shares)						450,000
Share price (in dollars per share) | $ / shares						$ 16.70
Management fee payable | $		$ 1,200,000						1,200,000		1,200,000			$ 1,200,000			$ 2,700,000
Value of shares issued for services (in dollars per share) | $ / shares															$ 3.15
Subsequent Event
Class of Stock [Line Items]
Decrease in book value (in dollars per share) | $ / shares														$ 0.31
Base Management Fee Q1 & Q2 2020
Class of Stock [Line Items]
Management fee payable | $			$ 3,800,000
Base Management Fee Q3 2020
Class of Stock [Line Items]
Management fee payable | $			$ 500,000
Preferred Stock
Class of Stock [Line Items]
Net proceeds from issuance of common stock | $									$ 111,183,000
Exchange Offer (in shares)				(103,260)
Common Stock
Class of Stock [Line Items]
Net proceeds from issuance of common stock | $								$ 18,000		$ 28,000	$ 40,000
Net proceeds from issuance of stock (in shares)								1,736,000		2,738,000	3,953,000
Exchange Offer (in shares)		3,679,634		516,300				516,000		516,000
Common Stock | Subsequent Event
Class of Stock [Line Items]
Exchange Offer (in shares)	900,000
Common Stock | Base Management Fee Q1 & Q2 2020
Class of Stock [Line Items]
Stock issued for services (in shares)			1,215,370
Common Stock | Base Management Fee Q3 2020
Class of Stock [Line Items]
Stock issued for services (in shares)			154,500
8.25% Series A Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Dividend percentage										8.25%
Liquidation preference (in dollars per share) | $ / shares		$ 25						$ 25		$ 25			$ 25
Redemption price (in dollars per share) | $ / shares		$ 25						$ 25		$ 25			$ 25
Preferred stock, shares outstanding (in shares)		2,027,000						2,027,000		2,027,000			2,027,000			2,070,000
8.25% Series A Cumulative Redeemable Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Dividends payable (in dollars per share) | $ / shares														1.54689
8.25% Series A Cumulative Redeemable Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Stock exchange offer, number of shares authorized to be exchanged (in shares)				250,470
Exchange Offer (in shares)		210,662		(42,820)
Preferred stock, shares outstanding (in shares)		2,027,180						2,027,180		2,027,180			2,027,180
8.00% Series B Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Dividend percentage										8.00%
Liquidation preference (in dollars per share) | $ / shares		$ 25						$ 25		$ 25			$ 25
Redemption price (in dollars per share) | $ / shares		$ 25						$ 25		$ 25			$ 25
Preferred stock, shares outstanding (in shares)		4,569,000						4,569,000		4,569,000			4,569,000			4,600,000
8.00% Series B Cumulative Redeemable Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Dividends payable (in dollars per share) | $ / shares														1.50
8.00% Series B Cumulative Redeemable Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Stock exchange offer, number of shares authorized to be exchanged (in shares)				556,600
Exchange Offer (in shares)		404,187		(31,085)
Preferred stock, shares outstanding (in shares)		4,568,915						4,568,915		4,568,915			4,568,915
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Number of units in private placement (in shares)					4,000,000
Dividend percentage					8.00%				8.00%	8.00%	8.00%
Liquidation preference (in dollars per share) | $ / shares		$ 25			$ 25			$ 25		$ 25			$ 25
Net proceeds from issuance of preferred stock | $					$ 111,200,000
Redemption price (in dollars per share) | $ / shares		$ 25						$ 25		$ 25			$ 25
Preferred stock, shares outstanding (in shares)		4,571,000						4,571,000		4,571,000			4,571,000			4,600,000
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Dividends payable (in dollars per share) | $ / shares														$ 1.50
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Net proceeds from issuance of common stock | $									$ 111,183,000		$ 111,183,000
Stock exchange offer, number of shares authorized to be exchanged (in shares)				556,600
Exchange Offer (in shares)		427,467		(29,355)
Preferred stock, shares outstanding (in shares)		4,570,645						4,570,645		4,570,645			4,570,645
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Exchange Offer (in shares)	260,000
Repurchase
Class of Stock [Line Items]
Value of common stock remained authorized for future share repurchases (in shares) | $		$ 14,600,000						$ 14,600,000		$ 14,600,000			$ 14,600,000
Sale Agents
Class of Stock [Line Items]
Net proceeds from issuance of common stock | $							$ 100,000,000	$ 1,200,000	$ 8,600,000	$ 4,700,000	$ 8,600,000		$ 32,300,000
Net proceeds from issuance of stock (in shares)								400,000	500,000	1,400,000	500,000		2,800,000
Remaining value of shares available to be issued | $		$ 67,700,000						$ 67,700,000		$ 67,700,000			$ 67,700,000
LIBOR Floating Rate | 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Dividend percentage					6.476%
Private Placement
Class of Stock [Line Items]
Number of units in private placement (in shares)												3,205,000
Private placement price per share (in dollars per share) | $ / shares												$ 20
Amount of common stock under warrant (in dollars per share)												0.50
Private placement warrant exercise price per share (in dollars per share) | $ / shares												$ 20.50
Over-Allotment Option | 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Number of units in private placement (in shares)					600,000

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Mar. 25, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Long-term Purchase Commitment [Line Items]
Net realized gain/(loss)		$ (14,431)	$ (16,132)	$ (257,183)	$ (64,225)
Settled Litigation
Long-term Purchase Commitment [Line Items]
Net realized gain/(loss)				$ 11,600
Settled Litigation | AG MIT CMO v. RBC (Barbados) Trading Corp
Long-term Purchase Commitment [Line Items]
Payment for accrued deficiencies	$ 5,000
Notes issued	$ 2,000

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Outstanding Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Nov. 06, 2020
Long-term Purchase Commitment [Line Items]
Total Commitment				$ 158,167
Funded Commitment				110,272
Remaining Commitment				47,895
Loan G | Commercial Portfolio Segment
Long-term Purchase Commitment [Line Items]
Total Commitment	$ 78,800	$ 84,500		78,806
Funded Commitment				56,697
Remaining Commitment				22,109
Paydown on loan			$ 5,700
Loan I | Commercial Portfolio Segment
Long-term Purchase Commitment [Line Items]
Total Commitment				20,000
Funded Commitment				15,211
Remaining Commitment				4,789
Loan I | Commercial Portfolio Segment | Subsequent Event
Long-term Purchase Commitment [Line Items]
Increase in capital commitment					$ 6,000
Loan K | Commercial Portfolio Segment
Long-term Purchase Commitment [Line Items]
Total Commitment				20,000
Funded Commitment				14,173
Remaining Commitment				5,827
LOTS
Long-term Purchase Commitment [Line Items]
Total Commitment				39,361
Funded Commitment				24,191
Remaining Commitment				$ 15,170

Discontinued Operations and A_3

Discontinued Operations and Assets and Liabilities Held for Sale - Narrative (Details) - Portfolio Of Single-Family Rental Properties $ in Millions	1 Months Ended
	Nov. 30, 2019USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Single Family Rental Properties	$ 137
Net realized gain/(loss)	$ 0.2

Discontinued Operations and A_4

Discontinued Operations and Assets and Liabilities Held for Sale - Income Statement (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest expense	$ (4,357,000)	$ (21,887,000)	$ (32,941,000)	$ (67,011,000)
Other Income/(Loss)
Other income	0	210,000	4,000	840,000
Total Other Income/(Loss)	7,011,000	1,908,000	(441,353,000)	27,019,000
Expenses
Other operating expenses	5,929,000	6,062,000	11,253,000	13,650,000
Total Expenses	9,512,000	9,086,000	27,760,000	22,683,000
Net Income/(Loss) from Discontinued Operations	0	(1,057,000)	361,000	(3,284,000)
Operating Segments | Single-Family Rental Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest expense		(1,247,000)	0	(3,741,000)
Other Income/(Loss)
Rental income		3,309,000	0	9,868,000
Net realized gain/(loss)		0	0	(96,000)
Other income		34,000	0	346,000
Total Other Income/(Loss)		3,343,000	0	10,118,000
Expenses
Other operating expenses		154,000	(80,000)	246,000
Property depreciation and amortization		1,013,000	0	3,640,000
Property operating expenses		1,986,000	(281,000)	5,775,000
Total Expenses		3,153,000	(361,000)	9,661,000
Net Income/(Loss) from Discontinued Operations	$ 0	$ (1,057,000)	$ 361,000	$ (3,284,000)

Discontinued Operations and A_5

Discontinued Operations and Assets and Liabilities Held for Sale - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other assets	$ 9,159	$ 21,905
Other liabilities	20,944	24,675
Operating Segments | Single-Family Rental Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other assets	0	154
Other liabilities	$ 305	$ 1,546

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 02, 2020	Sep. 30, 2020	Aug. 14, 2020	Sep. 17, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 06, 2020
Subsequent Event [Line Items]
Cash consideration		$ 6.3
Common Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)		3,679,634	516,300		516,000		516,000
Preferred Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)			(103,260)
Subsequent Event
Subsequent Event [Line Items]
Cash consideration	$ 1.7
Decrease in book value (in dollars per share)									$ 0.31
Subsequent Event | Common Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)	900,000
8.25% Series A Cumulative Redeemable Preferred Stock
Subsequent Event [Line Items]
Preferred stock dividend percentage							8.25%
8.25% Series A Cumulative Redeemable Preferred Stock | Preferred Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)		210,662	(42,820)
8.25% Series A Cumulative Redeemable Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Dividends payable (in dollars per share)									1.54689
8.00% Series B Cumulative Redeemable Preferred Stock
Subsequent Event [Line Items]
Preferred stock dividend percentage							8.00%
8.00% Series B Cumulative Redeemable Preferred Stock | Preferred Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)		404,187	(31,085)
8.00% Series B Cumulative Redeemable Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Dividends payable (in dollars per share)									1.50
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Subsequent Event [Line Items]
Preferred stock dividend percentage				8.00%		8.00%	8.00%	8.00%
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Preferred Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)		427,467	(29,355)
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Dividends payable (in dollars per share)									$ 1.50
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock | Subsequent Event | Preferred Stock
Subsequent Event [Line Items]
Exchange Offer (in shares)	260,000