Total Equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] 60 to 89 days Maturity60 To89 Days [Member] Represents the period of maturity for a group of securities or other assets sold under repurchase agreements, which mature between 60 days and 89 days from the reporting date. Level III Fair Value, Inputs, Level 3 [Member] Notional amount, liabilities Notional amount, liabilities Derivative Liability, Notional Amount Shares authorized (as a percent) Share Based Compensation Arrangement by Share Based Payment Award, Number of Shares Authorized Percentage Represents the percentage of number of shares that the entity can issue under the plan. Variation Margin Settlement Derivative, Variation Margin Settlement Derivative, Variation Margin Settlement Schedule of repurchase agreements collateralized by investments Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block] Taxable REIT Subsidiary Taxable REIT Subsidiary [Member] Taxable REIT Subsidiary [Member] Treasury stock, shares held (in shares) Treasury Stock, Shares Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Repurchase agreements Securities Sold under Agreements to Repurchase [Member] Repurchased borrowings Debt Instrument, Repurchase Amount Schedule of gross and net information about the Company's assets subject to master netting arrangements Offsetting Assets [Table Text Block] Interest rate swaps and interest rate swaptions Currency swaps and forwards Derivative [Line Items] Collateral [Axis] Collateral [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Whole-Loans Whole-Loans [Member] Whole-Loans [Member] Whole-Loans Whole Loans And Securitized Commercial Loan [Member] Represents whole loans and securitized commercial loan owned through trust certificates are pledged as collateral. The trust certificates are eliminated upon consolidation. Carrying Value Reported Value Measurement [Member] Awards granted to each of the entity's independent directors (in shares) Share Based Compensation Arrangement by Share Based Payment Award, Other than Options, Granted to Each Director Represents the number of awards granted to each of the directors. Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Residential Bridge Loans ($26,050 and $33,269 at fair value and $27,571 and $34,897 pledged as collateral, respectively) Residential Bridge Loan Residential Bridge Loan RSBC Trust RSBC Trust [Member] RSBC Trust [Member] Securitized debt Securitized Debt [Member] Collateralized debt obligations, including mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Proceeds from offering to non-controlling interest, net of offering costs Proceeds from Noncontrolling Interests Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Document and Entity Information Document and Entity Information Non-Agency RMBS Non Agency R M B S [Member] Non Agency R M B S Weighted Average Interest Rate on Borrowings Outstanding at  end of period Short-term Debt, Weighted Average Interest Rate, at Point in Time Debt instrument interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Unamortized discount Financing Receivables Unamortized Discount Represents the accretable discount on financing receivables. Schedule of additional information about the entity's financial instruments, which are measured at fair value on a recurring basis for which the entity has utilized Level III inputs to determine fair value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Unrealized Loss Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Class B Commercial Mortgage Pass-Through Certificate, Class B [Member] Commercial Mortgage Pass-Through Certificate, Class B [Member] Derivative asset, at fair value, gross amounts not offset in the consolidated balance sheets, financial instruments Derivative, Collateral, Obligation to Return Securities Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative credit risk valuation adjustment, derivative assets Derivative Credit Risk Valuation Adjustment, Derivative Assets Principal repayments on commercial loans Principal Repayments On Commercial Loan Principal Repayments On Commercial Loan Residential Whole Loans, at fair value ($1,309,795 and $1,375,860 pledged as collateral, at fair value, respectively) Residential Whole loans Fair Value Disclosure Fair value of residential whole-loans held for investments. Proceeds from non-controlling interest, net of offering costs Noncontrolling Interest, Increase from Subsidiary Equity Issuance Credit Facility [Axis] Credit Facility [Axis] Investments Classified By Contractual Maturity Date [Axis] Investments Classified By Contractual Maturity Date [Axis] Information by maturities of an entity's investments. Cancelled/forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Total liabilities, gross amounts offset in the consolidated balance sheet Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset Financial Instrument [Axis] Financial Instrument [Axis] Trading Activity [Axis] Trading Activity [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Axis] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Fixed Pay Rate Fixed Income Interest Rate [Member] Income Tax Authority [Domain] Income Tax Authority [Domain] Commitments and contingencies Commitments and Contingencies Management fees incurred but not yet paid Management Fees Due to Related Party Represents the amount of management fees, which was included in payable to related party as of the balance sheet date. One Year Or Less One Year Or Less [Member] Represents the term to maturity of derivative instruments one year or less. Arroyo Trust Arroyo Trust [Member] Arroyo Trust [Member] Short-term Debt [Line Items] Borrowings Under Repurchase Agreements Short-term Debt [Line Items] Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Total cash, cash equivalents and restricted cash shown in the Consolidated Statements of Cash Flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Due from counterparties Increase Decrease In Due From Counterparties, Investing Activities The increase or decrease in due from counterparties under investing activities. Proportion of votes required by the entity's independent directors for acceptance of reduction in management fees (as a percent) Related Party Transaction, Affirmative Votes Required for Accepting Reduction in Management Fees Represents the proportion of affirmative votes required by the entity's independent directors for acceptance of reduction in management fees. 7.01 – 9.00% Residential Bridge Loan Current Coupon Rate Two [Member] Residential Bridge Loan Current Coupon Rate Two [Member] Total liabilities Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract] Principal repayments Principal repayments Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Principal Repayments Represents the amount of principal repayments of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Total assets, gross amounts Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross Treasury Stock Treasury Stock [Member] Repurchase agreements, net amount Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral Treasury stock, at cost, 100,000 and 0 shares held, respectively Treasury Stock, Value Securities sold, not settled Mortgage Backed Securities Sold Not Settled Represents the receivables for mortgage-backed securities and other securities sold for which settlement has not taken place. Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] TBAs To Be Announced Securities [Member] Represents information pertaining to to-be-announced securities. Secured Debt Secured Debt [Member] 4.01– 5.00% Residential Portfolio Segment Current Coupon Rate One [Member] Represents portfolio segment of the company's total financing receivables related to residential financing receivables with current coupon interest range one. Proceeds from other liabilities Proceeds from Other Debt Derivative Instruments Trading Activity, Gains and Losses, Net [Line Items] Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Notional Amount Notional Disclosures [Abstract] Agency interest only strips accounted for as derivatives Agency Interest Only Strips Accounted For As Derivatives [Member] Interest-only and inverse interest-only securities issued as part of or collateralized with agency residential mortgage backed securities (RMBS), which are accounted for as derivatives with carrying value included in RMBS on the balance sheet. Net unsettled TBAs Net Securities Unsettled Yet To Be Announced Represents the net unsettled amount of securities not yet announced. Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Net income (loss) per Common Share — Basic (in dollars per share) Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Apartment Complex Apartment Building [Member] Amount of  Collateral at Risk, at fair value Repurchase Agreement Counterparty, Amount at Risk Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Unrealized gains/(losses), net on assets Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Mortgage loans on real estate, number of loans, nonperforming, percentage Mortgage Loans on Real Estate, Number of Loans, Nonperforming, Percentage Mortgage Loans on Real Estate, Number of Loans, Nonperforming, Percentage Investment assets measured at fair value on recurring basis for which the entity has utilized Level III inputs to determine fair value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Variable interest entity, primary beneficiary, aggregated disclosure Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] Repurchase agreements, net Securities Sold under Agreements to Repurchase Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Less than or equal to 10 years Investments Contractual Maturity Less Than Or Equal To Ten Years [Member] Period of maturity for a group of investment portfolio which mature within 10 years. Principal payments of Residential Bridge Loans, not settled Principal Payments of Residential Bridge Loans Not Settled Principal Payments of Residential Bridge Loans Not Settled Prior period over which management fees were incurred used to calculate the termination fee under the Management Agreement Related Party Transaction, Prior Period of Incurred Management Fees Used to Calculate Termination Fee of Management Agreement Represents the prior period over which management fees were incurred used to calculate the termination fee under the management agreement. Number of securities, less than 12 months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Interest expense (includes $2,164 and $2,338 on securitized debt held by affiliates, respectively) Interest Expense Class of Stock [Axis] Class of Stock [Axis] Plan Name [Domain] Plan Name [Domain] Delinquent bridge loans, yield to maturity Delinquent Bridge Loans, Yield to Maturity Delinquent Bridge Loans, Yield to Maturity Use of Estimates Use of Estimates, Policy [Policy Text Block] Due to Counterparties Due to Counterparties [Member] Due to Counterparties Assets Pledged and Accrued Interest Pledged Assets Including Accrued Interest Represents the fair value of assets pledged and accrued interest. Variable Pay Rate Variable Income Interest Rate [Member] Weighted Average Interest Rate on Borrowings Outstanding at  end of period Long-term Debt, Weighted Average Interest Rate, at Point in Time Liability Class [Axis] Liability Class [Axis] Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS, gross amounts Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Gross Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Gross Position [Domain] Position [Domain] Position [Axis] Position [Axis] Document Type Document Type Total derivative instruments Fair Value Derivative, Fair Value, Net Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Other Income (Loss) Nonoperating Income (Expense) Weighted Average Months Until Option Expiration Derivative, Average Remaining Maturity Other assets Other Assets Agency CMBS Commercial Mortgage Backed Securities Issued By Us Government Sponsored Enterprises [Member] Securities collateralized by commercial real estate mortgage loans, issued by US governmental sponsored enterprises. Entity Registrant Name Entity Registrant Name Residential Bridge Loans ($24,987 and $31,748 at fair value and $27,571 and $34,897 pledged as collateral, respectively) MBS pledged for borrowings under repurchase agreements Securities Sold under Agreements to Repurchase, Fair Value of Collateral Trust certificates issued Trust Certificates Issued Amount Amount issued for trust certificates. 15.01 – 17.00% Residential Bridge Loan Current Coupon Rate Six [Member] Residential Bridge Loan Current Coupon Rate Six [Member] Summary of restricted common stock vesting dates Restricted Common Stock Vesting Dates [Table Text Block] Tabular disclosure of the restricted common stock vesting dates. CMSC Trust Cmsc Trust [Member] Represents CMSC Trust 2015 - Longhouse MZ ("CMSC Trust"), a VIE of the entity. Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Treasury Stock Treasury Stock, Value, Acquired, Par Value Method SBC 1 Wolverine [Member] Wolverine [Member] Residential Whole-Loan And Residential Bridge Loan Residential Whole-Loan And Residential Bridge Loan [Member] Residential Whole-Loan And Residential Bridge Loan [Member] Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Repurchase agreements, gross amounts not offset in the consolidated balance sheets, financial instruments Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities Liabilities Liabilities, Fair Value Disclosure [Abstract] Schedule of sales and realized gain (loss) of the Company's MBS and other securities Realized Gain (Loss) on Investments [Table Text Block] Unrealized (gains)/losses, net on liabilities Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Variable interest entity, number of entity Variable Interest Entity, Number of Entity Number of variable interest entity, of which the Entity has been determined as the primary beneficiary. Debt Instrument [Axis] Debt Instrument [Axis] CRE 6 CRE Six [Member] CRE Six Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] 6.75% Convertible Senior Unsecured Notes Six Point Seventy Five Percent Convertible Senior Unsecured Notes [Member] Six Point Seventy Five Percent Convertible Senior Unsecured Notes [Member] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Weighted average expected remaining term to the expected maturity of investment portfolio Weighted Average Remaining Maturity of Investment Portfolio Represents the weighted average expected remaining term to maturity of the investment portfolio. Repurchase Agreement Borrowings Securities Sold Under Agreements To Repurchase Before Amortization of Debt Issuance Costs Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Includes unamortized debt issuance costs. Other than temporary impairment Other than temporary impairment Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings Derivative Contract Term [Domain] Derivative Contract Term [Domain] Represents the term to maturity of derivative instrument. Stock-based compensation expense recognized Share-based Payment Arrangement, Expense Summary of the effect of entity's derivative instruments reported in gain (loss) on derivative instruments, net on the statements of operations Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of components of the carrying value of Residential Whole-Loans and securitized commercial loan Schedule Of Residential Whole Loans Reconciliation Table Text Block [Table Text Block] Tabular disclosure of the reconciliation of residential and commercial whole-loans from cost basis to fair value. Restricted stock amortization Restricted Stock or Unit Expense Amortization of premium Available for Sale Securities Amortization of Premiums The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called amortization if security was purchased at a premium. Dividend payable Dividends and distributions declared, not paid Dividends Payable CRE 8 CRE Eight [Member] CRE Eight Trading Activities, Gain and Losses, by Type, by Income Statement Location [Table] Trading Activities, Gain and Losses, by Type, by Income Statement Location [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Expenses Operating Expenses [Abstract] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Legal Entity [Axis] Legal Entity [Axis] Other Income (Loss) Other Nonoperating Income (Expense) [Abstract] Purchase of commercial loans Purchase Of Commercial Loans Purchase Of Commercial Loans Stockholders’ Equity: Stockholders' Equity Attributable to Parent [Abstract] Greater Than Three Years And Less Than Five Years Greater Than Three Years And Less Than Five Years [Member] Represents the term to maturity of derivative instrument between three years to five years. Schedule of fair value, by balance sheet grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Derivative liability, at fair value Derivative liabilities Derivative liability, at fair value Derivative liability, at fair value, net amounts of assets presented in the consolidated balance sheets Derivative Liability Subsequent Events Subsequent Events [Text Block] Dividends to non-controlling interest, not paid Dividends to Non-controlling Interest, Not Paid Dividends to Non-controlling Interest, Not Paid Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Class A Commercial Mortgage Pass-Through Certificate, Class A [Member] Commercial Mortgage Pass-Through Certificate, Class A [Member] Principal & Interest First Mortgage Principal And Interest First Mortgage [Member] Principal And Interest First Mortgage [Member] Number of commercial loans trusts Variable Interest Entity, Consolidated, Number Of Commercial Loan Trusts Variable Interest Entity, Consolidated, Number Of Commercial Loan Trusts Derivative, average fixed interest rate Derivative, Average Fixed Interest Rate More than 20 years and less than or equal to 30 years Investments Contractual Maturity20 To30 Years [Member] Period of maturity for a group of investment portfolio which mature between 20 years and 30 years. Bridge Loan Bridge Loan [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Original FICO Score Mortgage Loans On Real Estate Weighted Average F ico Score Represents the weighted average FICO score on mortgage loans on real estate. Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Derivative asset, at fair value, net amount Derivative Asset, Fair Value, Amount Offset Against Collateral Mark-to-Market Derivative Instruments Gain (Loss) Basis Recovered Represents the amount of net gain (loss) on all derivative instruments recognized in earnings recovered during the period, before tax effect. Schedule of swaptions held Schedule of Swaptions Held [Table Text Block] Schedule of Swaptions Held Non-Agency CMBS Commercial Mortgage Backed Securities Issued By Private Enterprises [Member] Securities collateralized by commercial real estate mortgage loans, issued by non-governmental sponsored enterprises. Unvested at end of year (in dollars per share) Share Based Compensation Arrangement by Share Based Payment Award, Other than Options that will Vest on Future Date Weighted Average Grant Date Fair Value Represents the weighted average grant date fair value of shares that will vest on future date under share-based compensation plan. Amortization of deferred financing costs Amortization of Debt Issuance Costs Subsequent Event [Line Items] Subsequent Event [Line Items] Assets Sold under Agreements to Repurchase, Maturity Period [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] CRE 7 CRE Seven [Member] CRE Seven June 2020 Share-based Compensation Award, Tranche Five [Member] Share-based Compensation Award, Tranche Five [Member] Summary of interest rate swaps or interest rate swaptions Schedule of Interest Rate Derivatives [Table Text Block] Total assets, gross amounts offset in the consolidated balance sheets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability Management fee to affiliate Management fees Management Fee Related Party Represents the amount of expenses for related party management fees. Liabilities: Liabilities [Abstract] Dividends paid on common stock Payments of Dividends Offsetting [Abstract] Offsetting [Abstract] Realized loss on sale of real estate owned ("REO") Gain (Loss) on Sale of Mortgage Loans VIE Variable Interest Entity, Primary Beneficiary [Member] 11.01 – 13.00% Residential Bridge Loan Current Coupon Rate Four [Member] Residential Bridge Loan Current Coupon Rate Four [Member] Measurement Input Type [Domain] Measurement Input Type [Domain] Related Party [Domain] Related Party [Domain] Derivative Instruments Derivatives, Fair Value [Line Items] Securitized debt, net ($396,824 and $681,643 at fair value and $53,527 and $142,905 held by affiliates, respectively) Securitized debt, at fair value Secured Debt Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) Repurchase of common stock Payments for Repurchase of Common Stock Class A-2 Commercial Mortgage Pass-Through Certificate, Class A-2 [Member] Commercial Mortgage Pass-Through Certificate, Class A-2 [Member] Gross unrealized losses Financing Receivables Gross Unrealized Loss Accumulated In Investments Financing Receivables Gross Unrealized Loss Accumulated In Investments Amount of accumulated unrealized loss before deducting unrealized gain on investments in financing receivables impacting investments. Balance at beginning of period Balance at end of period Available for Sale Securities Accretable Discount Represents the amount of accretable discount on available for sale securities. Net income (loss) per Common Share — Diluted (in dollars per share) Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Offsetting Assets and Liabilities Offsetting Assets and Liabilities [Text Block] The entire disclosure of derivative and other financial assets and liabilities that are subject to offsetting, including master netting arrangements. Residential Whole-Loans Residential Whole-Loans [Member] Residential Whole-Loans Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Minimum Minimum [Member] Non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest Renewal term of management agreement Related Party Transaction, Renewal Term of Management Agreement Represents the term of the renewal period under the management agreement. Residential bridge loan, at fair value Residential Bridge Loan. At Fair Value Residential Bridge Loan. At Fair Value Purchase of securitized commercial loans Purchase Of Securitized Commercial Loan Represents the payments to purchase securitized commercial loan. Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Agency RMBS Interest-Only Strips Agency R M B S Interest Only Strips [Member] Interest-only and inverse interest-only securities issued as part of or collateralized with agency residential real estate mortgage loans (RMBS). Balance Sheet Location [Domain] Balance Sheet Location [Domain] Percentage of projected cash flow Mortgage Loans On Real Estate, Percentage Of Projected Cash Flow Mortgage Loans On Real Estate, Percentage Of Projected Cash Flow Repurchase agreements, gross amount Securities Sold under Agreements to Repurchase, Gross Measurement Input, Expected Term Measurement Input, Expected Term [Member] Commercial Facility Commercial Facility [Member] Commercial Facility [Member] Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Class A-1 Commercial Mortgage Pass-Through Certificate, Class A-1 [Member] Commercial Mortgage Pass-Through Certificate, Class A-1 [Member] Reimbursable employee costs incurred but not yet paid Accounts Payable, Related Parties Income tax (benefit) provision Income Tax Expense (Benefit) SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] Vesting [Axis] Vesting [Axis] Notice period to terminate the Management Agreement for cause Related Party Transaction, Notice Period to Terminate Management Agreement for Cause Represents the notice period required to be given by the entity to terminate the management agreement for cause. Receivable under reverse repurchase agreements, net amounts of assets presented in the consolidated balance sheets Securities Purchased under Agreements to Resell Trust certificates, fair value Trust Certificate, At Fair Value Trust Certificate, At Fair Value Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS, net amount Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Fair Value, Amount Offset Against Collateral Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Fair Value, Amount Offset Against Collateral Derivative liability, at fair value, gross amount Derivative Liability, Fair Value, Gross Liability Total assets, gross amount not offset in the consolidated balance sheets, cash collateral Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash Debt Conversion [Table] Debt Conversion [Table] Transfers/release of credit reserve Available for Sale Securities Discount Designated as Credit Reserve and OTTI Transfer or Release of Credit Reserve Represents the amount of transfer or release of credit reserve related to available for sale securities adjusted against discount designated as credit reserve and other than temporary impairment (OTTI). Class C Commercial Mortgage Pass-Through Certificate, Class C [Member] Commercial Mortgage Pass-Through Certificate, Class C [Member] Discount Designated as Credit Reserve and OTTI Balance at beginning of period Balance at end of period Available for Sale Securities Discount Designated as Credit Reserve and OTTI Represents the discount designated as credit reserve and other than temporary impairment (OTTI) on available-for-sale securities. The discount is not accretable. Decrease in interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Variable interest entity, amount acquired, eligible risk retention Variable Interest Entity, Amount Acquired, Eligible Risk Retention Variable Interest Entity, Amount Acquired, Eligible Risk Retention Total Assets Assets, Fair Value Disclosure Collateral already posted, aggregate fair value Collateral Already Posted, Aggregate Fair Value Hotel Hotel [Member] Proceeds from securitized debt Proceeds from Issuance of Secured Debt Securities loaned, collateral, right to reclaim cash Securities Loaned, Collateral, Right to Reclaim Cash Share-based Compensation [Abstract] Share-based Payment Arrangement, Noncash Expense [Abstract] Number  of Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Long-term Debt, Gross Long-term Debt, Gross Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Assets: Assets [Abstract] Unrealized Gain Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Retail Retail Site [Member] 9.01 – 11.00% Residential Bridge Loan Current Coupon Rate Three [Member] Residential Bridge Loan Current Coupon Rate Three [Member] Less: Unamortized Deferred Financing Costs Debt Instrument, Unamortized Discount (Premium), Net At The Market Offering At The Market Offering [Member] At The Market Offering Derivative liability, at fair value, net amount Derivative Liability, Fair Value, Amount Offset Against Collateral Loans held-for-sale, measurement input Loans Held-for-sale, Measurement Input Organization Nature of Operations [Text Block] Outstanding, beginning of period (in shares) Outstanding, end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Conforming Fixed Rate Mortgage Loan Fixed Rate Residential Mortgage [Member] Payable to affiliate Due to Related Parties Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Document Fiscal Year Focus Document Fiscal Year Focus Sales Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold Document Period End Date Document Period End Date London Interbank Offered Rate (LIBOR) Floor London Interbank Offered Rate (LIBOR) Floor [Member] London Interbank Offered Rate (LIBOR) Floor [Member] Convertible senior unsecured notes, conversion ratio Debt Instrument, Convertible, Conversion Ratio Mortgage loans on real estate weighted average loan to value, collateral dependent Mortgage Loans On Real Estate Weighted Average Loan To Value, Collateral Dependent Mortgage Loans On Real Estate Weighted Average Loan To Value, Collateral Dependent Measurement Basis [Axis] Measurement Basis [Axis] Borrowings under repurchase agreements Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Exit percent fee Debt Instrument, Exit Percent Fee Debt Instrument, Exit Percent Fee SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Domain] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Domain] Variable interest entity, fair value Variable Interest Entity, Fair Value The fair value of interest in consolidated variable interest entity, which is eliminated in consolidation. Schedule of certain information about the Residential Whole-Loans investment portfolio Residential Whole Loans Disclosures [Table Text Block] Tabular disclosure for residential whole-loans, including but not limited to coupon rate, principal balance, weighted average loan to value, etc. Derivative Instrument [Axis] Derivative Instrument [Axis] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Range [Axis] Statistical Measurement [Axis] Fair value, 12 months or more Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Basis of Presentation and Consolidation Basis of Accounting, Policy [Policy Text Block] Notional Amount Beginning balance Ending balance Derivative, Notional Amount Discount Designated as Credit Reserve and OTTI Available for Sale Securities Discount Designated as Credit Reserve and OTTI [Roll Forward] Expected  Life (years)(2) Mortgage Loans On Real Estate Weighted Average Life To Maturity Represents the weighted average life to maturity on mortgage loans on real estate. Gain (loss) on derivative instruments, net Total Gain (Loss) on Derivative Instruments, Net, Pretax Total assets, gross amount not offset in the consolidated balance sheets, financial instruments Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Securities Financings Debt Disclosure [Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized March 2022 Share-based Payment Arrangement, Tranche Three [Member] Weighted Average Swap Term (Years) Derivative, Term of Contract RETL Trust RETL Trust [Member] RETL Trust [Member] Securitized commercial loans, at fair value Securitized Commercial Loan, At Fair Value Fair value of securitized commercial loan for investment. Derivative [Table] Derivative [Table] Gross Gains Debt Securities, Available-for-sale, Realized Gain Assets Assets, Fair Value Disclosure [Abstract] Agency MBS Agency Mortgage Backed Securities [Member] Securities collateralized by residential and commercial real estate mortgage loans, issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac). 5.01 – 6.00% Residential Portfolio Segment Current Coupon Rate Two [Member] Represents portfolio segment of the company's total financing receivables related to residential financing receivables with current coupon interest range two. Accretion of discount Available for Sale Securities Accretion of Discount The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount. Schedule of changes in the components of purchase discount and amortizable premium on Non-Agency RMBS, Non-Agency CMBS and other securities Schedule of Available for Sale Securities Purchase Discount and Amortizable Premium [Table Text Block] Tabular disclosure of purchase discount and amortizable premium on securities designated as available for sale and which includes a roll forward schedule. State Jurisdiction State and Local Jurisdiction [Member] Payment of offering costs Payments of stock issuance costs Payments of Stock Issuance Costs Credit Facility [Domain] Credit Facility [Domain] Level II Fair Value, Inputs, Level 2 [Member] Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] Deferred Tax Asset [Domain] Deferred Tax Asset [Domain] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Agency RMBS Interest-Only Strips accounted for as derivatives, included in MBS Agency And Non Agency Interest Only Strips Accounted For As Derivatives [Member] Interest-only and inverse interest-only securities issued as part of or collateralized with agency and non-agency mortgage backed securities (MBS), which are accounted for as derivatives with carrying value included in MBS on the balance sheet. (Payments on) Proceeds from termination of futures, net Proceeds From (Payments For) Termination of Futures Proceeds From (Payments For) Termination of Futures Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Transfers from Level III into Level II Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Total liabilities, gross amounts not offset in the consolidated balance sheets, financial instruments Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Securities Amendment Flag Amendment Flag Measurement Input Type [Axis] Measurement Input Type [Axis] Greater than or equal to 90 days Maturity Over 89 Days Or Equal To 90 Days [Member] Maturity Over 89 Days Or Equal To 90 Days [Member] Liabilities and Equity: Liabilities and Equity [Abstract] Derivative, average variable interest rate Derivative, Average Variable Interest Rate Financial Asset, 30 to 59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Derivative Contract [Domain] Derivative Contract [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders Basic and Diluted [Abstract] Commercial pass-through certificate, amount Commercial Pass-Through Certificates, Amount Commercial Pass-Through Certificates, Amount Fair value Total Long-term Debt RCR Trust RCR Trust [Member] RCR Trust [Member] Debt Conversion [Line Items] Debt Conversion [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Non-Agency MBS Non-Agency Mortgage-Backed Securities [Member] Non-Agency Mortgage-Backed Securities [Member] Notional amount, assets Derivative Asset, Notional Amount Debt Securities, Available-for-sale, Gain (Loss) [Abstract] Debt Securities, Available-for-sale, Gain (Loss) [Abstract] Receivable under reverse repurchase agreements, gross amounts Securities Purchased under Agreements to Resell, Gross Coupon Debt Instrument, Premium, Coupon Rate Debt Instrument, Premium, Coupon Rate Commercial Loans, at fair value Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value Sale of Stock [Axis] Sale of Stock [Axis] Class X-EXT Commercial Mortgage Pass-Through Certificate, Class X-EXT [Member] Commercial Mortgage Pass-Through Certificate, Class X-EXT [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Subsequent Event [Table] Subsequent Event [Table] Derivative assets Fair value of derivative assets Derivative asset, at fair value, net amounts of assets presented in the consolidated balance sheets Derivative Asset Transfers/release of credit reserve Available for Sale Securities Unamortized Premium Transfer or Release of Credit Reserve Represents the amount of transfer or release of credit reserve related to available for sale securities adjusted to amortizable premium on available for sale securities. Accounting Policies [Abstract] Accounting Policies [Abstract] Original LTV Mortgage Loans On Real Estate Weighted Average Loan To Value Represents the percentage of weighted average mortgage loans on real estate to the value. Residential Bridge Loans, At Amortized Cost Residential Bridge Loans, At Amortized Cost [Member] Residential Bridge Loans, At Amortized Cost [Member] Number of Loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Greater Than One Year And Less Than Three Years Greater Than One Year And Less Than Three Years [Member] Represents the term to maturity of derivative instrument between one year to three years. Mortgage-backed securities recorded upon deconsolidation Mortgage-backed Securities Recorded upon Deconsolidation Mortgage-backed Securities Recorded upon Deconsolidation Transfered of non-qm residential whole loans Transfer Of Residential Mortgage-backed Securitization Transfer Of Residential Mortgage-backed Securitization Geographical [Domain] Geographical [Domain] Fair value Loans Receivable, Fair Value Disclosure Total liabilities, net amount Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral Unamortized Premium (Discount), net Available For Sale Securities, Unamortized Premium (Discount) Represents the unamortized premium (discount) on available for sale securities. Accretable Discount Available for Sale Securities Accretable Discount [Roll Forward] Unrealized losses, less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Weighted Average Weighted Average [Member] March 2020 Share-based Payment Arrangement, Tranche One [Member] Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Related Party Transactions Related Party Transaction [Line Items] Weighted Average Remaining Maturity (days) Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements Residential Bridge Loans Residential Bridge Loans [Member] Residential Bridge Loans [Member] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Income Tax Authority [Axis] Income Tax Authority [Axis] Arroyo Trust Arroyo Mortgage Trust 2019-2 [Member] Arroyo Mortgage Trust 2019-2 [Member] Investment in mortgage loans on real estate, principal amount at fair value of delinquent loan SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount At Fair Value of Delinquent Loan SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount At Fair Value of Delinquent Loan Total general and administrative expenses General and Administrative Expense CRE 9 CRE Nine [Member] CRE Nine Summary of the entity's derivative instruments Schedule of Derivative Instruments [Table Text Block] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] Capital Loss Carryforward Capital Loss Carryforward [Member] Interest-Only Mezzanine Loan Interest-Only Mezzanine Loan [Member] Interest-Only Mezzanine Loan [Member] Geographic Concentration Risk Geographic Concentration Risk [Member] Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Adjustments to reconcile net income (loss) to net cash used in operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] General and administrative expenses: General and Administrative Expense [Abstract] Derivative liability, at fair value Offsetting Derivative Liabilities [Abstract] Securities, at fair value Estimated Fair Value Mortgage-backed Securities Available-for-sale, Fair Value Disclosure Schedule of gross and net information about the Company's liabilities subject to master netting arrangements Offsetting Liabilities [Table Text Block] Number of shares remained available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Financial Asset, 60 to 89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] (Increase) decrease in other assets Increase (Decrease) in Other Operating Assets Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation expense Labor and Related Expense Schedule of Carrying Value of the Commercial Real Estate Loans Schedule of Carrying Value of the Commercial Real Estate Loans [Table Text Block] Schedule of Carrying Value of the Commercial Real Estate Loans [Table Text Block] Variable Interest Entities Variable Interest Entities No Definition Available. Award vesting rights, percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage VIE deconsolidation Variable Interest Entities Deconsolidation Variable Interest Entities Deconsolidation Number of counterparties from whom entity borrowed under repurchase agreement Number of Counterparties from whom Entity Borrowed under Repurchase Agreement Represents the number of counterparties to repurchase agreement from whom the entity borrowed the funds. SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] Consolidated Entities [Axis] Consolidated Entities [Axis] Principal repayments on Residential Whole Loans Principal Payments On Residential Whole Loans Represents the proceeds from collection of principal payments on residential whole-loans. Fair Value of Financial Instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Amount acquired, eliminated in consolidation Variable Interest Entity, Amount Acquired Amount acquired as interest in a consolidated Variable Interest Entity, which is eliminated in consolidation. Common stock: $0.01 par value, 500,000,000 shares authorized, 53,423,876 and 53,523,876 outstanding, respectively Common Stock, Value, Issued Net Interest Income Interest Income (Expense), Net [Abstract] Vesting [Domain] Vesting [Domain] Net Weighted Average Coupon (as a percent) Available For Sale Securities, Net Weighted Average Coupon Rate Represents the calculation as of the balance sheet date of the weighted average coupon rate, net of servicing and other fees on available for sale securities. Schedule of amounts of collateral at risk under its repurchase agreements greater than 10% of the Company's equity with any counterparty Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 10 Percent of Stockholders' Equity [Table Text Block] Loan variable rate Loans Receivable, Basis Spread on Variable Rate Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Number  of Securities Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract] Fair value, less than 12 months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Subtotal Agency Agency Residential Mortgage Backed Securities [Member] Agency Residential Mortgage Backed Securities [Member] Notional amount Notional Amount of Nonderivative Instruments Equity Components [Axis] Equity Components [Axis] Deferred tax liabilities, net Deferred Tax Liabilities, Net Class X-CP Commercial Mortgage Pass-Through Certificate, Class X-CP [Member] Commercial Mortgage Pass-Through Certificate, Class X-CP [Member] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Entity Small Business Entity Small Business Cancelled/forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Gross unrealized gains Financing Receivables Gross Unrealized Gain Accumulated In Investments Amount of accumulated unrealized gain before deducting unrealized loss on investments in financing receivables impacting investments. Current federal, state and local, tax expense (benefit) Current Federal, State and Local, Tax Expense (Benefit) Residual interests in asset-backed securities Residual Interests In Asset Backed Securities As Other Securities [Member] Residual interests in asset-backed securities included in other securities. Premium amortization and (discount accretion), net Premium and discount amortization, net Net (Premium Amortization/Amortization Basis) Discount Amortization Accretion (Amortization) of Discounts and Premiums, Investments Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Restated Facility Amended and Restated Facility [Member] Amended and Restated Facility Terminated and settled Derivative Notional Amount Terminated and Settled Derivative Notional Amount Terminated and Settled Reimbursable employee costs Related Party Transaction Employee Benefit Costs Advanced Represents the amount of employee benefit costs that were advanced by during the period and reimbursable to the related party. Non-Agency RMBS Interest-Only Strips Non Agency R M B S Interest Only Strips [Member] Interest-only and inverse interest-only securities issued as part of or collateralized with Non-Agency residential real estate mortgage loans (RMBS). Stockholders' Equity [Table] Stockholders' Equity [Table] Schedule detailing information related to shareholders' equity. Summary of collateral positions, with respect to borrowings under repurchase agreements, securitized debt, derivatives and clearing margin account Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Realized credit losses Available For Sale Securities, Discount Designated as Credit Reserve and OTTI Realized Credit Loss Realized credit losses on investments in debt securities classified as available for sale. Variable Rate [Axis] Variable Rate [Axis] Payments made on reverse repurchase agreements, net Payments for Securities Purchased under Agreements to Resell Barclays Capital Inc. Barclays Capital Inc. [Member] Barclays Capital Inc. Cash pledged to derivative counterparties Derivative, Collateral, Right to Reclaim Cash, Pledged To Counterparties Derivative, Collateral, Right to Reclaim Cash, Pledged To Counterparties Financial Asset, Equal to or Greater than 90 Days Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] More than 30 years Investments Contractual Maturity Over30 Years [Member] Period of maturity for a group of investment portfolio which mature over 30 years. 17.01 – 19.00% Residential Bridge Loan Current Coupon Rate Seven [Member] Residential Bridge Loan Current Coupon Rate Seven [Member] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Shares of Restricted Stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Investment related receivable, pledged as collateral Receivables from Brokers-Dealers and Clearing Organizations, Pledged As Collateral Receivables from Brokers-Dealers and Clearing Organizations, Pledged As Collateral Net Interest Income Interest Income (Expense), Net Derivative Contract Term [Axis] Derivative Contract Term [Axis] Information pertaining to derivative contract term. Debt issuance costs Debt Issuance Costs, Net Convertible senior unsecured notes, net Convertible Debt, Noncurrent Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS, gross amounts offset in the consolidated balance sheets Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Liability Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Liability Nomura Securities International, Inc. NOMURA SECURITIES INTERNATIONAL INC. [Member] NOMURA SECURITIES INTERNATIONAL INC. [Member] Derivative asset, at fair value Offsetting Derivative Assets [Abstract] Interest payments and basis recovered on MAC interest rate swaps Interests Payments And Basis Recovered On Market Agreed Coupon Interest Rate Swaps Represents the cash outflows on interest payments and basis recovered on market agreed coupon (MAC) interest rate swaps during the period. Derivative instruments not accounted as hedges under GAAP Not Designated as Hedging Instrument [Member] Income Statement [Abstract] Income Statement [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Transfers/release of credit reserve Available for Sale Securities Accretable Discount Transfer or Release of Credit Reserve Represents the amount of transfer or release of credit reserve related to available for sale securities adjusted to accretable discount on available for sale securities. Related Party Transactions [Abstract] Related Party Transactions [Abstract] Grants of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Gross Valuation allowances balance Deferred Tax Assets, Valuation Allowance Shares Vesting (in shares) Unvested at end of year (in shares) Share Based Compensation Arrangement by Share Based Payment Award, Other than Options that will Vest on Future Date Represents the number of shares that will vest on future date under share-based compensation plan. Title of Individual [Axis] Title of Individual [Axis] Equity awards Equity Awards [Member] Represents information pertaining to equity awards. Changes in notional amount Derivative Notional Amount [Roll Forward] Principal Balance Investment Owned, Balance, Principal Amount Derivative liability, at fair value, gross amounts not offset in the consolidated balance sheets, financial instruments Derivative, Collateral, Right to Reclaim Securities (Decrease) increase in interest payable Increase (Decrease) in Interest Payable, Net Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] No of Loans Commercial Loans, Number of Loans, Nonperforming Commercial Loans, Number of Loans, Nonperforming More than 10 years and less than or equal to 20 years Investments Contractual Maturity10 To20 Years [Member] Period of maturity for a group of investment portfolio which mature between 10 years and 20 years. Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Schedule of commercial mortgage pass-through certificates Schedule Of Commercial Mortgage Pass-Through Certificates [Table Text Block] Schedule Of Commercial Mortgage Pass-Through Certificates [Table Text Block] CRE LLC And CRE Mezz CRE LLC And CRE Mezz [Member] CRE LLC And CRE Mezz [Member] Summary of certain characteristics of the Company's repurchase agreements Schedule of Repurchase Agreements [Table Text Block] Recently adopted accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Director Deferred Fee Plan Director Deferred Fee Plan [Member] The plan that permits eligible members of the Company's board of directors to defer certain stock awards made under its director compensation programs. CRE 4 CRE Four [Member] CRE Four Multiple of average annual management fees used to calculate termination fee of management agreement Related Party Transaction, Multiple of Average Annual Management Fees Used to Calculate Termination Fee of Management Agreement Related Party Transaction, Multiple of Average Annual Management Fees Used to Calculate Termination Fee of Management Agreement Total assets, net amount Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Amount Offset Against Collateral Weighted average common shares outstanding for diluted earnings per share Weighted Average Number of Shares Outstanding, Diluted MRCD Trust MRCD Trust [Member] MRCD Trust Summary of certain information about the Company's investment portfolio Debt Securities, Available-for-sale [Table Text Block] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Convertible senior unsecured notes Convertible Debt, Fair Value Disclosures Credit default swaps Credit Default Swap [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Total assets Total assets Assets Subsequent Event Subsequent Event [Member] Variable Rate [Domain] Variable Rate [Domain] Treasury stock (in shares) Treasury Stock, Shares, Acquired Restricted common stock Restricted Stock [Member] Interest payable (includes $536 and $647 on securitized debt held by affiliates, respectively) Interest payable Interest Payable Unrealized losses, 12 months or more Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Subtotal Non-Agency MBS Mortgage-backed Securities, Issued by Private Enterprises [Member] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Professional fees Professional Fees Foreclosed other real estate owned Other Real Estate, Foreclosed Assets, and Repossessed Assets Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Class of Stock [Domain] Class of Stock [Domain] Investment liabilities measured at fair value on recurring basis for which the entity has utilized Level III inputs to determine fair value Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Weighted Average Interest Rate on Borrowings Outstanding at end of period, Total Weighted Average Interest Rate, at Point in Time Weighted Average Interest Rate, at Point in Time Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Total liabilities, net amounts presented in the consolidated balance sheets Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Other operating expenses Other Cost and Expense, Operating Proceeds from sale of REO Proceeds from Sale of Real Estate Held-for-investment Grants of restricted stock (shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Residential portfolio segment with no FICO score Residential Portfolio Segment With No Fico Score [Member] Portfolio segment of the company's total financing receivables related to residential financing receivables with no original FICO score available. 13.01 – 15.00% Residential Bridge Loan Current Coupon Rate Five [Member] Residential Bridge Loan Current Coupon Rate Five [Member] Weighted average common shares outstanding for basic earnings per share Weighted Average Number of Shares Issued, Basic Schedule of additional information about to be announced securities Schedule of Additional Information about to be Announced Securities [Table Text Block] Schedule of Additional Information about to be Announced Securities Increase in other liabilities Proceeds from (Payments for) Other Financing Activities Washington WASHINGTON Weighted Average Remaining Maturity (days) Debt Instrument, Weighted Average Remaining Maturity Period Represents the weighted average remaining term of debt instrument. Financial Instruments [Domain] Financial Instruments [Domain] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Supplemental disclosure of operating cash flow information: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Principal  Balance SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Schedule of the assets and liabilities of the VIE included in the Consolidated Balance Sheets Schedule of Variable Interest Entities [Table Text Block] Residential Bridge Loans, At Fair Value Residential Bridge Loans, At Fair Value [Member] Residential Bridge Loans, At Fair Value [Member] Unrealized (gain) loss on derivative instruments, net Return (Recovery) of Basis Unrealized Gain (Loss) on Derivatives Entity Filer Category Entity Filer Category Securitized commercial loans Securitized Commercial Loan [Member] Represents information pertaining to the securitized commercial loan. Non-Qualifying Adjustable Rate Mortgage Loan Non-Qualifying Adjustable Rate Mortgage [Member] Non-Qualifying Adjustable Rate Mortgage [Member] Schedule of restricted stock activity Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Statement [Line Items] Statement Statement [Line Items] Hedging Designation [Domain] Hedging Designation [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Dividends, declared per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Plan Name [Axis] Plan Name [Axis] Estimated Fair Value Derivative, Fair Value, Net [Abstract] Amortization of discount on convertible senior notes Amortization of Debt Discount (Premium) Derivative asset, at fair value, gross amounts offset in the consolidated balance sheets Derivative Asset, Fair Value, Gross Liability Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Premium on purchase of securitized commercial loans Premium On Purchase Of Securitized Commercial Loans Premium On Purchase Of Securitized Commercial Loans Fair value of mortgage-backed securities and other securities pledged as collateral (in dollars) Pledged Assets Separately Reported, Mortgage-Related Securities Available-for-sale or Held-for-investment Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Total liabilities, gross amounts Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Futures contracts Future [Member] Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Coupon  Rate LTV rate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate Level I Fair Value, Inputs, Level 1 [Member] Schedule of the U.S. states concentration and principal balance of collateral securing residential whole-loans Residential Whole Loans By U S States Table Text Block [Table Text Block] Tabular disclosure of the U.S. states represented in residential whole-loans based on principal balance. Director Director [Member] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Dividends declared on common stock Dividends Interest payments and basis recovered on MAC interest rate swaps Payment Of Interests And Basis Recovered On Market Agreed Coupon Interest Rate Swaps Represents cash inflows or outflows on interest payments and basis recovered on market agreed coupon (MAC) interest rate swaps during the period. Due From Counterparties Due From Counterparties [Member] Due From Counterparties Other assets - Transfer of Bridge Loans to REO Noncash or Part Noncash Acquisition, Other Assets Acquired Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Receivable under reverse repurchase agreements, net amount Securities Purchased under Agreements to Resell, Amount Offset Against Collateral Class M-1 Commercial Mortgage Pass-Through Certificate, Class M-1 [Member] Commercial Mortgage Pass-Through Certificate, Class M-1 [Member] Other Other States [Member] Represents all other states. Additional paid-in capital Additional Paid in Capital Fair value of residential whole-loans pledged as collateral Pledged Residential Whole Loans The fair value, as of the date of each statement of financial position presented, of residential whole-loans held for investments, and pledged as collateral. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Liabilities of deconsolidated VIE Liabilities, of Deconsolidated Variable Interest Entities Liabilities, of Deconsolidated Variable Interest Entities COVID response, borrowers requesting forbearance, principal balance COVID Response, Borrowers Requesting Forbearance, Principal Balance COVID Response, Borrowers Requesting Forbearance, Principal Balance Common Stock Outstanding Common Stock [Member] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Contractual interest income (expense), net Interest Income (Expense), Nonoperating, Net Share-Based Payments Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unrealized gains/(losses), net on assets held at the end of the period Debt Securities, Unrealized Gain (Loss) Net income (loss) Net income (loss) Net income (loss) attributable to common stockholders and participating securities for basic and diluted earnings per share Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Entity Shell Company Entity Shell Company Affiliated Entity Affiliated entities Affiliated Entity [Member] Schedule of other-than-temporary impairments the Company recorded on its securities portfolio Schedule of Other Than Temporary Impairment Losses, Investments [Table Text Block] Tabular disclosure of investments with other-than-temporary impairments recognized in earnings. Purchase of securities Payments to Acquire Investments Transfers into Level III from Level II Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 To-Be-Announced Pricing Model (TBA) To-Be-Announced Pricing Model (TBA) [Member] To-Be-Announced Pricing Model (TBA) Shareholders equity Stockholder's Equity [Line Items] Interest rate swaps Interest Rate Swap [Member] Total Liabilities and Equity Liabilities and Equity Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Loss on derivatives, net Other Settlements / Expirations Gain (Loss) on Sale of Derivatives Derivative, notional amount, additions Derivative, Notional Amount, Additions Derivative, Notional Amount, Additions Concentration Concentration Risk, Percentage Premium for credit default swaps, net Payments (Proceeds From) Premium Received From Credit Default Swaps Payments (Proceeds From) Premium Received From Credit Default Swaps Other general and administrative expenses Other General and Administrative Expense Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Receivable under reverse repurchase agreements Securities for Reverse Repurchase Agreements Amounts of collateral at risk under its repurchase agreements greater than 10% of the Company's equity with any counterparty Repurchase Agreement Counterparty [Line Items] Proceeds from repurchase agreement borrowings Proceeds from Securities Sold under Agreements to Repurchase The cash inflow from investments sold under the agreement to repurchase such investment. Proceeds Proceeds from Sale of Debt Securities, Available-for-sale Principal payments of Residential Whole Loans, not settled Principal Payments Of Residential Whole Loans, Not Settled Represents the principal payments of residential whole-loans for which settlement has not taken place. Commercial Loans Financing Receivables [Text Block] Assisted Living Assisted Living [Member] Assisted Living Realized gain (loss) on investments, net Net Gain  (Loss) Debt Securities, Available-for-sale, Realized Gain (Loss) Credit Suisse Securities (USA) LLC Credit Suisse Securities (USA) LLC [Member] Credit Suisse Securities (USA) LLC Repayments of securitized debt Repayments of Secured Debt Realized gains/(losses), net on assets Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Realized Gain (Loss) Included in Earnings Amount of realized gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Securities purchased under agreements to resell, fair value of collateral Securities Purchased under Agreements to Resell, Fair Value of Collateral Sales and settlements Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Sales and Settlements Represents the amount of sales and settlements of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions that the market participants would use in pricing. Award Type [Axis] Award Type [Axis] Repurchase Agreements Offsetting Securities Sold under Agreements to Repurchase [Abstract] Due from counterparties, net Increase (Decrease) Due from Counterparties The increase or decrease in cash posted with counterparties as collateral. Derivative liability, at fair value, gross amounts offset in the consolidated balance sheets Derivative Liability, Fair Value, Gross Asset Unamortized premium Financing Receivables Unamortized Premium Represents the unamortized premium on financing receivables. Other, net Other Nonoperating Income (Expense) Schedule of the U.S. states concentration and principal balance of collateral securing residential bridge-loans Residential Bridge Loans By U S States [Table Text Block] Residential Bridge Loans By U S States [Table Text Block] Financing Receivables Total Financing Receivables Total [Member] Total financing receivables, when it serves as a benchmark in a concentration of risk calculation, representing the sum of all financing receivables as of the balance sheet date. Summary of the components of interest income on the Company's MBS and other securities Investment Income [Table Text Block] Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS Offsetting Securities Accounted For As Derivatives [Abstract] Offsetting Securities Accounted For As Derivatives Net income attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Repayments of repurchase agreement borrowings Payments for Securities Sold under Agreements to Repurchase The cash outflow for investments sold under the agreement to repurchase such investment. Geographical [Axis] Geographical [Axis] Retained  Earnings  (Accumulated Deficit) Retained Earnings [Member] Commercial Mezzanine Loan Commercial Mezzanine Loan [Member] Commercial Mezzanine Loan [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Purchase of Residential Whole Loans Purchase Of Residential Whole Loans Represents the payments to purchase residential whole-loans. Repurchase agreements, net amounts of assets presented in the consolidated balance sheets Securities Sold Under Agreements To Repurchase Before Amortization of Debt Issuance Costs And Long-term Debt Borrowings Securities Sold Under Agreements To Repurchase Before Amortization of Debt Issuance Costs And Long-term Debt Borrowings New York NEW YORK RNR Trust RNR Trust [Member] RNR Trust [Member] Other securities Other Securities [Member] Other securities not separately disclosed. Statement [Table] Statement [Table] Class A-3 Commercial Mortgage Pass-Through Certificate, Class A-3 [Member] Commercial Mortgage Pass-Through Certificate, Class A-3 [Member] Subtotal Agency Residential Mortgage Backed Securities Issued By U S Government Sponsored Enterprises [Member] Securities collateralized by residential real estate mortgage loans, issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac). Number of long-term repurchase agreements Number of Long-term Repurchase Agreements Number of Long-term Repurchase Agreements Commercial Loans Commercial Loan [Member] Coupon Interest Investment Income Interest Operating Amount before accretion (amortization) of purchase discount (premium) of interest income on operating securities. Maximum Maximum [Member] New Jersey NEW JERSEY Net income (loss) allocable to common stockholders — basic and diluted Net Income (Loss) Available to Common Stockholders, Basic Schedule of the entity's financial instruments carried at fair value based upon the valuation hierarchy Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Sales Available for Sale Securities Unamortized Premium Reductions Securities Sold This item represents a decrease to the cumulative amount of amortizable premium on available for sale securities due to securities sold. Domestic Tax Authority Domestic Tax Authority [Member] Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS, gross amounts not offset in the consolidated balance sheets, financial instruments Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Obligation To Return Securities Securities Accounted For As Derivatives Included In Mortgage Backed Securities, Obligation To Return Securities Investments Classified By Contractual Maturity Date [Domain] Investments Classified By Contractual Maturity Date [Domain] Providing information by maturities of an entity's investments. Schedule of gross unrealized losses and estimated fair value of the Company's MBS and other securities by length of time that such securities have been in a continuous unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] Schedule of commercial real estate loans held Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Aggregate principal amount of 6.75% convertible senior unsecured notes Principal Balance Debt Instrument, Face Amount RBR Trust RBR Trust [Member] RBR Trust Contractual  Maturity  (years) Mortgage Loans on Real Estate, Contractual Maturity Contractual maturity for mortgage loan receivable on real estate. Total Collateralized Mortgage Backed Securities [Member] Commercial And Residential Portfolio Segment Commercial And Residential Portfolio Segment [Member] Commercial And Residential Portfolio Segment 7.01 - 8.00% Residential Portfolio Segment Current Coupon Rate Four [Member] Represents portfolio segment of the company's total financing receivables related to residential financing receivables with current coupon interest range four. Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Debt instrument, term Debt Instrument, Term Long Long [Member] Range [Domain] Statistical Measurement [Domain] Management fees (as a percent) Related Party Transaction, Management Fee Percentage Represents the percentage of the entity's stockholders' equity which is payable to the related party by the entity as a management fee. Less unamortized debt issuance costs Unamortized Debt Issuance Expense 6.01 – 7.00% Residential Portfolio Segment Current Coupon Rate Three [Member] Represents portfolio segment of the company's total financing receivables related to residential financing receivables with current coupon interest range three. Subtotal Agency CMBS Subtotal Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprises [Member] Subtotal Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprises [Member] Derivative, swaption interest rate Derivative, Swaption Interest Rate Share-Based Payments Share-based Payment Arrangement [Text Block] Derivative, terminated Derivative, Terminated Derivative, Terminated California CALIFORNIA Other liabilities Other Liabilities CRE 10 CRE Ten [Member] CRE Ten Related Party [Axis] Related Party [Axis] 30 to 59 days Maturity30 To59 Days [Member] Represents the period of maturity for a group of securities or other assets sold under repurchase agreements, which mature between 30 days and 59 days from the reporting date. Estimated Fair Value Estimate of Fair Value Measurement [Member] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Counterparty Name [Axis] Counterparty Name [Axis] Summary of the available quantitative information about the significant unobservable inputs used in the fair value measurement of financial instruments Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Dividends declared on non-controlling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Commercial Loans, at fair value ($320,308 and $350,213 pledged as collateral, at fair value, respectively) Commercial Loan, At Fair Value Commercial Loan, At Fair Value Schedule of cash dividends declared and paid on common stock Dividends Declared [Table Text Block] Mortgage-Backed Securities and other securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Loans held-for-sale, term Loans Held-for-sale, Term Derivative asset, at fair value, gross amounts not offset in the consolidated balance sheets, cash collateral Derivative, Collateral, Obligation to Return Cash Principal repayments on securitized commercial loans Principal Repayments On Securitized Commercial Loan Principal Repayments On Securitized Commercial Loan Total Expenses Noninterest Expense Due from counterparties Cash Collateral Carrying Value Carrying amount as of the balance sheet date of cash collateral held by counterparties for derivatives or borrowings under repurchase agreements. Greater Than Five Years Greater Than Five Years [Member] Represents the term to maturity of derivative instruments greater than five years. Due to counterparties Due to Counterparties Carrying Value Net The carrying value, as of the balance sheet date, of the obligation to return collateral (including cash) to counterparties. Supplemental disclosure of non-cash financing/investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Repurchase agreements, gross amounts offset in the consolidated balance sheets Securities Sold under Agreements to Repurchase, Asset Entity Central Index Key Entity Central Index Key Debt Disclosure [Abstract] Debt Disclosure [Abstract] Trading Activity, by Type [Domain] Trading Activity, by Type [Domain] Certain characteristics of the Company's repurchase agreements Short-term Debt, Other Disclosures [Abstract] CRE 5 CRE Five [Member] CRE Five Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Financing Receivable, Past Due Financing Receivable, Past Due [Table Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Residential Facility Residential Facility [Member] Residential Facility [Member] Redemption price, percentage Debt Instrument, Redemption Price, Percentage Noncontrolling Interest [Table] Noncontrolling Interest [Table] Nursing Facilities Nursing Facilities [Member] Nursing Facilities [Member] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] SBC 4 KC Portfolio [Member] KC Portfolio [Member] Georgia GEORGIA Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Restricted cash Restricted Cash JP Morgan Securities LLC JP Morgan Securities LLC [Member] JP Morgan Securities LLC Notional balance Notional Balance Other Than Principal Balance Aggregate notional amount specified by the security. Expressed as an absolute value. Unamortized compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Proceeds from sale of securities Proceeds from Sale of Mortgage-backed Securities (MBS), Available-for-sale Non-Controlling Interest Noncontrolling Interest [Member] Number of repurchase agreements Number of Repurchase Agreements Number of Repurchase Agreements Florida FLORIDA Sale of Stock [Domain] Sale of Stock [Domain] Schedule of basic and diluted net income (loss) per share of common stock Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Assets pledged- fair value Financial Instruments, Owned and Pledged as Collateral, at Fair Value Repurchase agreements, gross amounts not offset in the consolidated balance sheets, cash collateral Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Agency RMBS Interest-Only Strips accounted for as derivatives, included in MBS Agency Residential Mortgage Backed Securities Interest Only Strips Accounted For As Derivatives [Member] Interest-only and inverse interest-only securities issued as part of or collateralized with agency residential mortgage backed securities (MBS), which are accounted for as derivatives with carrying value included in MBS on the balance sheet. Income Taxes Income Tax Disclosure [Text Block] Proportion of affirmative votes by the entity's independent directors to terminate the Management Agreement (as a percent) Related Party Transaction, Affirmative Votes Required to Terminate Management Agreement Following Initial Term Represents the proportion of affirmative votes required by the entity's independent directors to terminate the management agreement following initial term. Cash posted by counterparties Repurchase Agreement Counterparty, Cash Posted Repurchase Agreement Counterparty, Cash Posted Document Fiscal Period Focus Document Fiscal Period Focus Schedule of Repurchase Agreement Counterparty [Table] Schedule of Repurchase Agreement Counterparty [Table] Financial Asset, 1 to 29 Days Past Due Financial Asset, 1 to 29 Days Past Due [Member] Third parties Third Party [Member] Third Party [Member] Amortizable Premium Available for Sale Securities Unamortized Premium [Roll Forward] CRE 2 CRE Two [Member] CRE Two Increase in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Valuation Allowance [Line Items] Valuation Allowance [Line Items] Mortgage loans on real estate, principal amount of delinquent loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans Fair value of investments pledged against repurchase agreements Security Owned and Pledged as Collateral, Fair Value Class HRR Commercial Mortgage Pass-Through Certificate, Class HRR [Member] Commercial Mortgage Pass-Through Certificate, Class HRR [Member] Amortized cost Financing receivable amortized cost Financing Receivable Amortized Cost Financing Receivable Amortized Cost Investment related receivable ($41,214 and $0 pledged as collateral, respectively) Investment related receivable Receivables from Brokers-Dealers and Clearing Organizations Number of securities, 12 months or more Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Equity offering amount, maximum Equity Offering Amount Maximum Equity Offering Amount Maximum Derivative assets, at fair value Derivative Assets Including Others Accounted for as Derivatives Fair value, after the effects of master netting arrangements, of derivative assets, including other assets accounted for as derivatives. Includes assets not subject to a master netting arrangement and not elected to be offset. Interest receivable Interest Receivable Principal Financing Receivable, Past Due 3.01 – 4.00% Residential Portfolio Segment Current Coupon Rate Six [Member] Represents portfolio segment of the company's total financing receivables related to residential financing receivables with current coupon interest range Six. Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Unrealized gain (loss), net Unrealized (gain) loss, net Unrealized Gain (Loss) on Investments Parent Parent [Member] New Jersey DISTRICT OF COLUMBIA Additional  Paid-In Capital Additional Paid-in Capital [Member] Swaptions Swaption [Member] Fair Value SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Relationship to Entity [Domain] Title of Individual [Domain] Deferred tax asset, net operating losses Deferred Tax Assets, Operating Loss Carryforwards Gross Losses Debt Securities, Available-for-sale, Realized Loss Dividends, cash paid per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Premium on purchase of Residential Whole Loans Premium On Purchase Of Residential Whole Loans Represents the amount of premium recorded on purchase of residential whole loans during the period. Fair Value Measurement [Domain] Fair Value Measurement [Domain] Vesting of restricted stock APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Interest income Interest Income Interest Income, Operating Schedule of to be announced securities Schedule of to be Announced Securities [Table Text Block] Schedule of to be Announced Securities Interest rate stated percentage Debt Instrument, Interest Rate, Stated Percentage Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Summary of restricted common stock vesting dates Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Principal balance Financing Receivable, before Allowance for Credit Loss Schedule of the fair value and contractual maturities of the Company's investment securities Investments Classified by Contractual Maturity Date [Table Text Block] Total Liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Receivable under reverse repurchase agreements, gross amounts not offset in the consolidated balance sheets, cash collateral Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash March 2021 Share-based Payment Arrangement, Tranche Two [Member] Schedule of residential bridge loans Schedule of Residential Bridge Loans [Table Text Block] Schedule of Residential Bridge Loans [Table Text Block] Receivable under reverse repurchase agreements, gross amounts not offset in the consolidated balance sheets, financial instruments Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities Financing Receivable, Percentage Of Excess Proceeds Financing Receivable, Percentage Of Excess Proceeds Financing Receivable, Percentage Of Excess Proceeds Receivable under reverse repurchase agreements, gross amounts offset in the consolidated balance sheets Securities Purchased under Agreements to Resell, Liability SBC 5 CT Portfolio [Member] CT Portfolio [Member] Increase (decrease) in payable to affiliate Increase (Decrease) in Due to Related Parties Realized (gain) loss on investments, net Debt Securities, Realized Gain (Loss) Securitized debt, at fair value Fair Value Debt Instrument, Fair Value Disclosure Outstanding at beginning of period (in dollars per share) Outstanding at end of year (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Less: Dividends and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Measurement Frequency [Axis] Measurement Frequency [Axis] Total assets Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract] Non-Agency RMBS and Non-Agency CMBS and other securities Residential Mortgage Backed Securities And Commercial Mortgage Backed Securities Issued By Private Enterprises [Member] Securities collateralized by residential and commercial real estate mortgage loans, issued by non-governmental sponsored enterprises. Net Income per Common Share Earnings Per Share [Text Block] Convertible senior unsecured notes, conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Percentage of  Stockholders’  Equity Repurchase Agreement Counterparty Percentage of Stockholder's Equity Represents the amount outstanding under the repurchase agreement as a percentage of stockholders' equity with a specific counterparty. Equity Award [Domain] Award Type [Domain] Cash Cash [Member] Amounts recognized on the statements of operations related to the Company's derivatives Derivative Instruments, Gain (Loss) [Line Items] Number of independent directors to whom awards were granted Share Based Compensation Arrangement by Share Based Payment Award, Number of Directors to whom Awards were Granted Represents the number of independent director, to whom the awards were granted under share-based compensation plan. Total liabilities, gross amounts not offset in the consolidated balance sheets, cash collateral Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash Hedging Desi