Debt Disclosure [Abstract] Financings Debt Disclosure [Text Block] Quarterly Financial Information Disclosure [Abstract] Net Interest Income Interest Income (Expense), Net [Abstract] Interest income Interest Income, Operating Interest expense (includes $5,674, $13,739 and $981 on securitized debt held by affiliates, respectively) Interest Expense Net Interest Income Interest Income (Expense), Net Realized gain (loss) on sale of investments, net Debt Securities, Available-for-sale, Realized Gain (Loss) Other Income (Loss) Other Nonoperating Income (Expense) [Abstract] Other than temporary impairment Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Recognized in Earnings Unrealized gain (loss), net Unrealized Gain (Loss) on Investments Unrealized gain (loss), net Debt Securities, Unrealized Gain (Loss) Gain (loss) on derivative instruments, net Gain (Loss) on Derivative Instruments, Net, Pretax Other, net Interest Income On Cash Balances and Other Income (loss) Amount of interest income earned from cash balances and other income (loss) not separately disclosed. Other Income (Loss) Other Nonoperating Income (Expense) Expenses Operating Expenses [Abstract] Management fee to affiliate Management Fee Related Party Represents the amount of expenses for related party management fees. Other operating expenses Other Cost and Expense, Operating Compensation expense Labor and Related Expense Professional fees Professional Fees Other general and administrative expenses Other General and Administrative Expense Total general and administrative expenses General and Administrative Expense Total Expenses Noninterest Expense Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax provision (benefit) Income Tax Expense (Benefit) Net income (loss) Net Income (Loss) Attributable to Parent Net income per Common Share — Basic (in dollars per share) Earnings Per Share, Basic Net income per Common Share — Diluted (in dollars per share) Earnings Per Share, Diluted Stockholders' Equity Note [Abstract] Schedule of cash dividends declared and paid on common stock Dividends Declared [Table Text Block] Schedule of presentation of selected unaudited results of operations Quarterly Financial Information [Table Text Block] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract] 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] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Residential Whole-Loan And Residential Bridge Loan Residential Whole-Loan And Residential Bridge Loan [Member] Residential Whole-Loan And Residential Bridge Loan [Member] Residential Bridge Loans Residential Bridge Loans [Member] Residential Bridge Loans [Member] Commercial Loans Commercial Loan [Member] Securitized Commercial Loans Securitized Commercial Loan [Member] Represents information pertaining to the securitized commercial loan. 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] 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] Adjustable Rate Residential Mortgage Loan Held in Securitization Trusts Adjustable Rate Residential Mortgage [Member] Variable Rate Residential Mortgage Loan Held in Securitization Trusts Variable Rate Residential Mortgage [Member] Loan to purchase or refinance residential real estate such as a home, in which the real estate itself serves as collateral for the loan and in which the interest rate and the amount of each payment vary throughout the life of the loan. Fixed Rate Residential Mortgage Loan Held in Securitization Trusts Fixed Rate Residential Mortgage [Member] Commercial Mezzanine Loan Held in Securitization Trust Commercial Mezzanine Loan Held In Securitization Trust [Member] Commercial mezzanine loan held in securitization trust. SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Amount [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Amount [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Loan Amount [Domain] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Original Loan Amount [Domain] Original Loan Balance $0 - $249,999 SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans under $250,000 [Member] Original Loan Balance $250,000 - $499,999 SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans between $250,000 and $499,999 [Member] Original Loan Balance $500,000- $749,999 SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans between $500,000 and $749,999 [Member] Original Loan Balance $750,000 - $999,999 SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans between $750,000 and $999,999 [Member] Original Loan Balance $1,000,000 - $1,249,999 Mortgage Loans Between1000000 And1249999 [Member] Real estate mortgage loans with an original loan amount of greater than $1,000,000 but less than $1,250,000. Original Loan Balance $1,250,000 - $1,499,999 Mortgage Loans Between1250000 And1499999 [Member] Real estate mortgage loans with an original loan amount of greater than $1,250,000 but less than $1,500,000. Original Loan Balance $1,500,000 and above Mortgage Loans Over1500000 [Member] Real estate mortgage loans with an original loan amount of no less than $1,500,000. Original Loan Balance $25,000,000 Mortgage Loans At25000000 [Member] Real estate mortgage loans with an original loan amount of $25,000,000. Original Loan Balance 45,185,500 Original Loan Balance 45,185,500 [Member] Original Loan Balance 45,185,500 [Member] Original Loan Amount 115,500,000 Original Loan Amount 115,500,000 [Member] Original Loan Amount 115,500,000 [Member] Original Loan Amount 13,600,000 Original Loan Amount 13,600,000 [Member] Original Loan Amount 13,600,000 [Member] Original Loan Amount 5,744,800 Original Loan Amount 5,744,800 [Member] Original Loan Amount 5,744,800 [Member] Original Loan Amount 32,000,000 Original Loan Amount 32,000,000 [Member] Original Loan Amount 32,000,000 [Member] Original Loan Amount 20,000,000 Original Loan Amount 20,000,000 [Member] Original Loan Amount 20,000,000 [Member] Original Loan Amount 7,258,696 Original Loan Amount 7,258,696 [Member] Original Loan Amount 7,258,696 [Member] Original Loan Amount 30,000,000 Original Loan Amount 30,000,000 [Member] Original Loan Amount 30,000,000 [Member] Original Loan Amount 4,425,400 Original Loan Amount 4,425,400 [Member] Original Loan Amount 4,425,400 [Member] Original Loan Amount 900,000,000 Original Loan Amount 900,000,000 [Member] Original Loan Amount 900,000,000 [Member] Original Loan Amount 234,500,000 Original Loan Amount 234,500,000 [Member] Original Loan Amount 234,500,000 [Member] Original Loan Amount 50,000,000 Original Loan Amount 50,000,000 [Member] Original Loan Amount 50,000,000 [Member] Original Loan Amount 90,000,000 Original Loan Amount 90,000,000 [Member] Original Loan Amount 90,000,000 [Member] Original Balance Amount 40,000,000 Original Balance Amount 40,000,000 [Member] Original Balance Amount 40,000,000 [Member] Original Loan Amount 13,206,521 Original Loan Amount 13,206,521 [Member] Original Loan Amount 13,206,521 [Member] Original Loan Amount 24,534,783 Original Loan Amount 24,534,783 [Member] Original Loan Amount 24,534,783 [Member] Original Loan Amount 1,350,000,000 Original Loan Amount 1,350,000,000 [Member] Original Loan Amount 1,350,000,000 [Member] Original Loan Amount 25,000,000 Original Loan Amount 25,000,000 [Member] Original Loan Amount 25,000,000 [Member] Original Loan Amount 10,500,000 Original Loan Amount 10,500,000 [Member] [Member] Original Loan Amount 10,500,000 [Member] [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Mortgage Loans on Real Estate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] Number of Loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Coupon Rate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate Principal balance SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Fair Value SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Principal Amount of Loans Subject to Delinquent Principal or Interest SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans Period for interest only payments Mortgage Loans On Real Estate Period For Interest Only Payments Represents the period within which the interest only payments will be applied from start. Amortization schedule Mortgage Loans on Real Estate, Periodic Payment Terms, Amortization Schedule Amortization schedule of mortgage loans, determining principal and interest payments amount. Reconciliation of Carrying Value of Mortgage Loans on Real Estate: SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] Beginning balance Unrealized gains SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan Unrealized gains Mortgage Loans On Real Estate Unrealized Gains The amount of unrealized gain on mortgage loans on real estate during the reporting period. Collections of principal SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Collections of Principal Amortization of premium and (discounts) SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Amortization of Premium Unrealized losses Mortgage Loans On Real Estate Unrealized Losses The amount of unrealized losses on mortgage loans on real estate during the reporting period. Realized losses Mortgage Loans On Real Estate Realized Losses Mortgage Loans On Real Estate Realized Losses Balance at end of period Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Secondary Offering Secondary Offering [Member] Secondary Offering [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Western Asset Management Company Western Asset Management Company [Member] Represents Western Asset Management Company, an investment advisor registered with the U.S. Securities and Exchange Commission, or the SEC, and a wholly-owned subsidiary of Legg Mason, Inc., or Legg Mason (NYSE: LM). Related Party Transactions Related Party Transaction [Line Items] 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. Renewal term of management agreement Related Party Transaction, Renewal Term of Management Agreement Represents the term of the renewal period under the management agreement. 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. 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. Notice period to terminate the Management Agreement following initial term Related Party Transaction, Notice Period to Terminate Management Agreement Following Initial Term Represents the notice period required to be given by the entity to terminate the management agreement following initial term. 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. 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. Sale of stock, number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction Net proceeds from issuance of common stock Proceeds from Issuance of Common Stock Management fees 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. 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. Accounts payable, related parties Accounts Payable, Related Parties Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] VIE Variable Interest Entity, Primary Beneficiary [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Subtotal 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). Non-Agency MBS Non-Agency Mortgage-Backed Securities [Member] Non-Agency Mortgage-Backed Securities [Member] Other securities Other Securities [Member] Other securities not separately disclosed. Statement [Line Items] Statement [Line Items] Assets: Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash Estimated Fair Value Mortgage-backed Securities Available-for-sale, Fair Value Disclosure Residential Whole-Loans, at fair value ($1,375,860 and $1,041,885 pledged as collateral, at fair value, respectively) Residential Whole loans Fair Value Disclosure Fair value of residential whole-loans held for investments. Residential Bridge Loans ($31,748 and $211,766 at fair value and $34,897 and $221,486 pledged as collateral, respectively) Securities Sold under Agreements to Repurchase, Fair Value of Collateral Residential Bridge Loans ($33,269 and $211,999 at fair value and $34,897 and $221,486 pledged as collateral, respectively) Residential Bridge Loan Residential Bridge Loan Securitized commercial loans, at fair value Securitized Commercial Loan, At Fair Value Fair value of securitized commercial loan for investment. Commercial Loans, at fair value Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value Commercial Loans, at fair value ($350,213 and $196,123 pledged as collateral, at fair value, respectively) Commercial Loan, At Fair Value Commercial Loan, At Fair Value Investment related receivable Receivables from Brokers-Dealers and Clearing Organizations Interest receivable Interest Receivable 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. 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. Other assets Other Assets Total assets Assets Liabilities and Stockholders' Equity: Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Repurchase agreements, net Securities Sold under Agreements to Repurchase Convertible senior unsecured notes, net Convertible Debt, Noncurrent Securitized debt, net ($681,643 and $949,626 at fair value and $142,905 and $246,802 held by affiliates, respectively) Secured Debt Interest payable (includes $647 and $816 on securitized debt held by affiliates, respectively) Interest Payable 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. Derivative liability, at fair value Derivative Liability Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Payable to affiliate Due to Related Parties Dividend payable Dividends Payable Other liabilities Other Liabilities Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders' Equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.01 par value, 500,000,000 shares authorized, and 53,523,876 and 48,116,379 outstanding, respectively Common Stock, Value, Issued Preferred stock, $0.01 par value, 100,000,000 shares authorized and no shares outstanding Preferred Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) Total Stockholders' Equity Stockholders' Equity Attributable to Parent Total Liabilities and Stockholders' Equity Liabilities and Equity Income Tax Disclosure [Abstract] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Earnings Per Share [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders Basic and Diluted [Abstract] Net income attributable to common stockholders and participating securities for basic and diluted earnings per share Dividends and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Net income allocable to common stockholders—basic and diluted Net Income (Loss) Available to Common Stockholders, Basic Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding for basic earnings per share (in shares) Weighted Average Number of Shares Issued, Basic Weighted average common shares outstanding for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic earnings per common share (in dollars per share) Diluted earnings per common share (in dollars per share) Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Trading Activities, Gain and Losses, by Type, by Income Statement Location [Table] Trading Activities, Gain and Losses, by Type, by Income Statement Location [Table] Trading Activity [Axis] Trading Activity [Axis] Trading Activity, by Type [Domain] Trading Activity, by Type [Domain] Variable Pay Rate Variable Income Interest Rate [Member] Fixed Pay Rate Fixed Income Interest Rate [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swaps Interest Rate Swap [Member] Interest Sate Swaption Interest Rate Swaption [Member] Foreign Currency Forwards Foreign Exchange Forward [Member] Derivative instruments Trading Activity, Gains and Losses, Net [Line Items] Schedule of interest rate swaps, interest rate swaptions, currency swaps and forwards, futures contracts and TBA derivative instruments, options and linked transactions Schedule of Derivative Instruments [Table Text Block] Summary of the effect of interest rate swaps, swaptions, foreign currency swaps, foreign currency forwards, options, futures contracts, Agency and Non-Agency Interest-Only Strips as derivatives and TBAs reported in Gain (loss) on derivative instruments, net on the Statements of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Summary of interest rate swaps or interest rate swaptions Schedule of Interest Rate Derivatives [Table Text Block] Summary of long and short TBA positions reported in Derivative assets, at fair value on the Balance Sheets Schedule of to be Announced Securities [Table Text Block] Tabular disclosure of to-be-announced securities with long and short positions. Schedule of additional information about the contracts to purchase and sell TBAs Schedule of Additional Information about to be Announced Securities [Table Text Block] Tabular disclosure of additional information about to-be-announced securities with long and short positions. Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Affiliated Entity Affiliated Entity [Member] Fair value of mortgage-backed securities pledged as collateral Pledged Assets Separately Reported, Mortgage-Related Securities Available-for-sale or Held-for-investment 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. Residential bridge loan. at fair value Residential Bridge Loan. At Fair Value Residential Bridge Loan. At Fair Value Securitized debt Debt Instrument, Fair Value Disclosure Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Borrowings under repurchase agreements Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Assets Liabilities Schedule of Repurchase Agreement Counterparty [Table] Schedule of Repurchase Agreement Counterparty [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Credit Suisse AG, Cayman Islands Branch Credit Suisse AG, Cayman Islands Branch [Member] Credit Suisse AG, Cayman Islands Branch [Member] Barclays Capital Inc. Rbc Barbados Trading Bank Corporation [Member] Represents information pertaining to the counterparty named RBC (Barbados) Trading Bank Corporation. 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] Amount of Collateral at Risk, at fair value Repurchase Agreement Counterparty, Amount at Risk Weighted Average Remaining Maturity (days) Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements 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. Noncontrolling Interest [Abstract] Schedule of commercial real estate loans held Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of the assets and liabilities of the VIE included in the Consolidated Balance Sheets Schedule of Variable Interest Entities [Table Text Block] 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] Income Tax Contingency [Table] Income Tax Contingency [Table] Taxable REIT Subsidiary Taxable REIT Subsidiary [Member] Taxable REIT Subsidiary [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] State and Local Jurisdiction State and Local Jurisdiction [Member] Domestic Tax Authority Domestic Tax Authority [Member] Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] Deferred Tax Asset [Domain] Deferred Tax Asset [Domain] Operating Loss Carryforwards Operating Loss Carryforwards [Member] Operating Loss Carryforwards [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Net capital loss carry-forward Deferred Tax Assets, Capital Loss Carryforwards Net operating loss available for carry-back and carry-forward Deferred Tax Assets, Operating Loss Carryforwards Allowance Deferred Tax Assets, Valuation Allowance Net deferred tax liability Deferred Tax Liabilities, Net Current Tax Provision (Benefit) Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Total Current Provision for Income Taxes, net Current Income Tax Expense (Benefit) Deferred Provision (Benefit) for Income Taxes Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Total Deferred Benefit for Income Taxes, net Deferred Income Tax Expense (Benefit) Income Tax Expense (Benefit) Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Futures Contracts Future [Member] Credit Default Swap Credit Default Swap [Member] TBAs To Be Announced Securities [Member] Represents information pertaining to to-be-announced securities. Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivative Instruments Not Accounted as Hedges Under GAAP Not Designated as Hedging Instrument [Member] Derivative Instruments Derivatives, Fair Value [Line Items] Cash collateral, derivative liability, at fair value Derivative, Collateral, Right to Reclaim Cash Notional Amount Notional Disclosures [Abstract] Notional amount, assets Derivative Asset, Notional Amount Notional amount, liabilities Derivative Liability, Notional Amount Estimated Fair Value Derivative, Fair Value, Net [Abstract] Estimated Fair value, assets Derivative Asset Derivative liabilities Total derivative instruments Derivative, Fair Value, Net Noncontrolling Interest [Table] Noncontrolling Interest [Table] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Cash Total assets Interest payable Total liabilities Investments, Debt and Equity Securities [Abstract] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Total mortgage-backed securities and other securities Collateralized Mortgage Backed Securities [Member] 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. 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). Subtotal Agency RMBS 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). Non-Agency RMBS Residential Mortgage Backed Securities Issued By Private Enterprises [Member] Securities collateralized by residential real estate mortgage loans, issued by non-governmental sponsored enterprises. 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). 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. Subtotal Non-Agency MBS Mortgage-backed Securities, Issued by Private Enterprises [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Fair value, less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Fair value, 12 months or longer Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Unrealized loss position, less than 12 Months, accumulated loss Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or Longer, Accumulated Loss Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Number of Securities Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract] Number of positions, less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Number of positions, 12 months or longer Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Number of Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Variable Interest Entities No Definition Available. Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Non-Qualifying Adjustable Rate Mortgage Non-Qualifying Adjustable Rate Mortgage [Member] Non-Qualifying Adjustable Rate Mortgage [Member] Investor Fixed Rate Mortgage Investor Fixed Rate Mortgage [Member] Investor Fixed Rate Mortgage [Member] 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. 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. 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. 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. 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. Residential Whole Loans Residential Portfolio Segment [Member] 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. 5.01 - 7.00% Residential Bridge Loan Current Coupon Rate Two [Member] Residential Bridge Loan Current Coupon Rate Two [Member] 7.01 – 9.00% Residential Bridge Loan Current Coupon Rate Three [Member] Residential Bridge Loan Current Coupon Rate Three [Member] 9.01 – 11.00% Residential Bridge Loan Current Coupon Rate Four [Member] Residential Bridge Loan Current Coupon Rate Four [Member] 11.01 – 13.00% Residential Bridge Loan Current Coupon Rate Five [Member] Residential Bridge Loan Current Coupon Rate Five [Member] 13.01 – 15.00% Residential Bridge Loan Current Coupon Rate Six [Member] Residential Bridge Loan Current Coupon Rate Six [Member] 17.01 - 19.00% Residential Bridge Loan Current Coupon Rate Seven [Member] Residential Bridge Loan Current Coupon Rate Seven [Member] 13.01 - 14.00% Residential Bridge Loan Current Coupon Rate Ten [Member] Residential Bridge Loan Current Coupon Rate Ten [Member] 17.01 – 19.00% Residential Bridge Loan Current Coupon Rate Eight [Member] Residential Bridge Loan Current Coupon Rate Eight [Member] Residential Portfolio Segment Current Coupon Rate Five Residential Portfolio Segment Current Coupon Rate Five [Member] Residential Portfolio Segment Current Coupon Rate Five [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Number of Loans 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. 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. Expected Life (in years) Mortgage Loans On Real Estate Weighted Average Life To Maturity Represents the weighted average life to maturity on mortgage loans on real estate. Contractual Maturity (years) Mortgage Loans on Real Estate, Contractual Maturity Contractual maturity for mortgage loan receivable on real estate. Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] RETL Trust RETL Trust [Member] RETL Trust [Member] Arroyo Trust Arroyo Trust [Member] Arroyo Trust [Member] MRCD Trust MRCD Trust [Member] MRCD Trust [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt Secured Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Class A Commercial Mortgage Pass-Through Certificate, Class A [Member] Commercial Mortgage Pass-Through Certificate, Class A [Member] Class B Commercial Mortgage Pass-Through Certificate, Class B [Member] Commercial Mortgage Pass-Through Certificate, Class B [Member] Class C Commercial Mortgage Pass-Through Certificate, Class C [Member] Commercial Mortgage Pass-Through Certificate, Class C [Member] Class HRR Commercial Mortgage Pass-Through Certificate, Class D [Member] Commercial Mortgage Pass-Through Certificate, Class D [Member] Class X-CP Commercial Mortgage Pass-Through Certificate, Class X-CP [Member] Commercial Mortgage Pass-Through Certificate, Class X-CP [Member] Class X-EXT Commercial Mortgage Pass-Through Certificate, Class X-EXT [Member] Commercial Mortgage Pass-Through Certificate, Class X-EXT [Member] Class A-1 Commercial Mortgage Pass-Through Certificate, Class A-1 [Member] Commercial Mortgage Pass-Through Certificate, Class A-1 [Member] Class A-2 Commercial Mortgage Pass-Through Certificate, Class A-2 [Member] Commercial Mortgage Pass-Through Certificate, Class A-2 [Member] Class A-3 Commercial Mortgage Pass-Through Certificate, Class A-3 [Member] Commercial Mortgage Pass-Through Certificate, Class A-3 [Member] Class M-1 Commercial Mortgage Pass-Through Certificate, Class M-1 [Member] Commercial Mortgage Pass-Through Certificate, Class M-1 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Notional amount of nonderivative instruments Notional Amount of Nonderivative Instruments Principal Balance Debt Instrument, Face Amount Coupon Debt Instrument, Premium, Coupon Rate Debt Instrument, Premium, Coupon Rate Fair Value Long-term Debt Carrying Value Long-term Debt, Gross Less: Unamortized Deferred Financing Costs Debt Instrument, Unamortized Discount (Premium), Net Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] 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. Option Options Held [Member] Total Return Swap Total Return Swap [Member] Amounts recognized on the statements of operations related to the Company's derivatives Derivative Instruments, Gain (Loss) [Line Items] Other Settlements / Expirations Gain (Loss) on Sale of Derivatives Variation Margin Settlement Derivative, Variation Margin Settlement Derivative, Variation Margin Settlement Return (Recovery) of Basis 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. Mark-to-Market Unrealized Gain (Loss) on Derivatives Contractual interest income (expense), net Interest Income (Expense), Nonoperating, Net Total Collateral already posted, aggregate fair value Collateral Already Posted, Aggregate Fair Value Share-based Compensation [Abstract] Summary of restricted common stock vesting dates Restricted Common Stock Vesting Dates [Table Text Block] Tabular disclosure of the restricted common stock vesting dates. Schedule of restricted stock activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Outstanding Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings (Accumulated) Deficit Retained Earnings [Member] Treasury Stock Treasury Stock [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance (in shares) Balance Vesting of restricted stock Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Equity component of convertible senior unsecured notes Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Treasury stock (in shares) Stock Repurchased During Period, Shares Treasury Stock Stock Repurchased During Period, Value Treasury Stock (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Treasury Stock Stock Issued During Period, Value, Treasury Stock Reissued Dividends on common stock Dividends, Common Stock Proceeds from public offerings of common stock (in shares) Stock Issued During Period, Shares, New Issues Net proceeds from public offerings of common stock Stock Issued During Period, Value, New Issues Offering costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Grants of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Grants of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Gross Balance (in shares) Balance Schedule of components of the carrying value of Residential Whole-Loans and Securitized commercial loan Schedule Of Residential Whole Loans Reconciliation Table Text Block Tabular disclosure of the reconciliation of residential and commercial whole-loans from cost basis to fair value. 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. Schedule of the US states represented in Residential Whole-Loans based on principal balance Residential Whole Loans By U S States Table Text Block Tabular disclosure of the U.S. states represented in residential whole-loans based on principal balance. Schedule of the U.S. states concentration and principal balance of collateral securing residential bridge loans Schedule of Residential Bridge Loans [Table Text Block] Schedule of Residential Bridge Loans [Table Text Block] 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] Aging of residential whole loans and bridge loans Past Due Financing Receivables [Table Text Block] Share-Based Payments Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Accounting Policies [Abstract] Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation and Consolidation Basis of Accounting, Policy [Policy Text Block] Variable Interest Entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Earnings (Loss) per share Earnings Per Share, Policy [Policy Text Block] Offering Costs Offering Costs [Policy Text Block] Represents the accounting policies related to offering costs. Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Valuation of financial instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Mortgage-Backed Securities and Other Securities Investment, Policy [Policy Text Block] Residential Whole-Loans / Residential Bridge Loans Finance, Loans and Leases Receivable, Policy [Policy Text Block] Interest income recognition Revenue Recognition, Interest [Policy Text Block] Purchases and Sales of Investments Marketable Securities, Policy [Policy Text Block] Due From Counterparties/Due To Counterparties Due from and Due to Counterparties [Policy Text Block] Disclosure of accounting policy for due from and due to counterparties. Due from counterparties represents cash posted with counterparties and due to counterparties represents cash posted with the entity by its counterparties as collateral under derivative agreements. Derivatives and Hedging Activities Derivatives, Policy [Policy Text Block] Repurchase Agreements and Reverse Repurchase Agreements Repurchase Agreements, Collateral, Policy [Policy Text Block] Securitized Debt Debt, Policy [Policy Text Block] Share-based compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income taxes Income Tax, Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Recently adopted accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Schedule of basic and diluted net income (loss) per share of common stock Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] 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. Discount Designated as Credit Reserve and OTTI Available for Sale Securities Discount Designated as Credit Reserve and OTTI [Roll Forward] Balance at beginning 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. 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. Purchases Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment Sales Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold 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). Balance at end of period Accretable Discount Available for Sale Securities Accretable Discount [Roll Forward] Balance at beginning of period Available for Sale Securities Accretable Discount Represents the amount of accretable discount on available for sale securities. 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. Purchases Available for Sale Securities Unamortized Discount Additions Securities Purchased This item represents an increase to the cumulative amount of accretable discount on available for sale securities due to securities purchased. Sales Available for Sale Securities Unamortized Discount Reductions Securities Sold This item represents a decrease to the cumulative amount of accretable discount on available for sale securities due to securities sold. 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. Balance at end of period Amortizable Premium Available for Sale Securities Unamortized Premium [Roll Forward] Balance at beginning of period Available for Sale Securities, Unamortized Premium Represents the unamortized premium on available for sale securities. 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. Purchases Available for Sale Securities Unamortized Premium Additions Securities Purchased This item represents an increase to the cumulative amount of amortizable premium on available for sale securities due to securities purchased. 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. 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. Balance at end of period Net Income per Common Share Earnings Per Share [Text Block] Schedule IV - Mortgage Loans on Real Estate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Text Block] Residential Whole Loans, at Fair Value Residential Whole-Loans [Member] Residential Whole-Loans [Member] Residential Bridge Loans, at Fair Value Residential Bridge Loans, At Fair Value [Member] Residential Bridge Loans, At Fair Value [Member] Residential Bridge Loans, at Amortized Cost Residential Bridge Loans, At Amortized Cost [Member] Residential Bridge Loans, At Amortized Cost [Member] Unamortized premium Financing Receivables Unamortized Premium Represents the unamortized premium on financing receivables. Unamortized discount Financing Receivables Unamortized Discount Represents the accretable discount on financing receivables. Amortized cost Financing Receivable Amortized Cost Financing Receivable Amortized Cost 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. Gross unrealized losses Financing Receivables Gross Unrealized Loss Accumulated In Investments Amount of accumulated unrealized loss before deducting unrealized gain on investments in financing receivables impacting investments. Fair value Loans Receivable, Fair Value Disclosure Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Premium amortization and (discount accretion), net Accretion (Amortization) of Discounts and Premiums, Investments Interest income earned added to principal of securities Interest Income Earned Added to Principal of Mortgage-backed Securities and Other Securities Represents interest income earned added to principal of Mortgage-backed securities and other securities. Amortization of deferred financing costs Amortization of Debt Issuance Costs Amortization of Debt Discount (Premium) Amortization of Debt Discount (Premium) Restricted stock amortization Restricted Stock or Unit Expense 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. 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. Premium on purchase of Residential Bridge Loans Premium on Purchase of Residential Bridge Loans Premium on Purchase of Residential Bridge Loans Premium on purchase of securitized commercial loans Premium On Purchase Of Securitized Commercial Loans Premium On Purchase Of Securitized Commercial Loans Unrealized (gain) loss, net Unrealized (gain) loss on derivative instruments, net Other than temporary impairment Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings Realized loss on sale of real estate owned (REO), net Gain (Loss) on Sale of Mortgage Loans Realized (gain) loss on sale of investments, net Debt Securities, Realized Gain (Loss) Other Settlements / Expirations Loss on foreign currency transactions, net Foreign Currency Transaction Gain (Loss), Realized Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Decrease (increase) in interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Decrease (increase) in other assets Increase (Decrease) in Other Operating Assets Increase (decrease) in interest payable Increase (Decrease) in Interest Payable, Net (Decrease) increase in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities (Decrease) increase in payable to related party Increase (Decrease) in Due to Related Parties Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchase of securities Payments to Acquire Investments Proceeds from sale of securities Proceeds from Sale of Mortgage-backed Securities (MBS), Available-for-sale Principal repayments and basis recovered on securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Proceeds from sale of REO Proceeds from Sale of Real Estate Purchase of Residential Whole Loans Purchase Of Residential Whole Loans Represents the payments to purchase residential whole-loans. Principal repayments on Residential Whole Loans Principal Payments On Residential Whole Loans Represents the proceeds from collection of principal payments on residential whole-loans. Purchase of commercial loans Purchase Of Commercial Loans Purchase Of Commercial Loans Principal repayments on commercial loans Principal Repayments On Commercial Loan Principal Repayments On Commercial Loan Purchase of securitized commercial loans Purchase Of Securitized Commercial Loan Represents the payments to purchase securitized commercial loan. Principal repayments on securitized commercial loans Principal Repayments On Securitized Commercial Loan Principal Repayments On Securitized Commercial Loan Purchase of Residential Bridge Loans Purchase of Residential Bridge Loans Purchase of Residential Bridge Loans Principal repayments on Residential Bridge Loans Principal Repayments on Residential Bridge Loans Principal Repayments on Residential Bridge Loans Payment of premium for option derivatives Payments of Premium for Option Derivatives Represents the amount of premium paid on derivative option. Premium received from option derivatives Proceeds from Premium for Option Derivatives Represents the amount of proceeds received on derivative option. Premium for credit default swaps, net Payments (Proceeds From) Premium Received From Credit Default Swaps Payments (Proceeds From) Premium Received From Credit Default Swaps Net settlements of TBAs Proceeds Repayment from Settlement of Derivatives on Securities yet to be Announced Represents the cash inflow or outflow due to settlement of derivatives on securities which are yet to be announced. Proceeds from (Payments on) termination of futures, net Proceeds From (Payments For) Termination of Futures Proceeds From (Payments For) Termination of Futures Due from counterparties, net Increase Decrease In Due From Counterparties, Investing Activities The increase or decrease in due from counterparties under investing activities. Payments on total return swaps Payments On Total Return Swaps Represents cash inflows or outflows related to total return swaps. 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. Premium for interest rate swaptions, net Payments of Premium for Interest Rate Swaption Represents the amount of premium paid on interest rate swaption. Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Payment of offering costs Payments of Stock Issuance Costs Repurchase of common stock Payments for Repurchase of Common Stock Proceeds from sale of treasury stock Proceeds from Sale of Treasury Stock 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 from convertible note offering Proceeds from Convertible Debt 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. Proceeds from securitized debt Proceeds from Issuance of Secured Debt Repayments of securitized debt Repayments of Secured Debt Proceeds from forward contracts Proceeds from Derivative Instrument, Financing Activities Repayments of forward contracts Payments for Derivative Instrument, Financing Activities Payments made for deferred financing costs Payments of Financing Costs Due from counterparties, net Increase (Decrease) Due from Counterparties The increase or decrease in cash posted with counterparties as collateral. Due to counterparties, net Increase (Decrease) Due to Counterparties The increase or decrease in cash posted with the entity by counterparties as collateral. Increase (decrease) in other liabilities, net Proceeds from (Payments for) Other Financing Activities Dividends paid on common stock Payments of Dividends Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Supplemental disclosure of operating cash flow information: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes paid Income Taxes Paid Supplemental disclosure of non-cash financing/investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Underwriting and offering costs payable Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Repurchase of common stock, not settled Principal Payments of Mortgage Backed Securities Not Settled Represents the principal payments of mortgage-backed securities for which settlement has not taken place. Securities purchased, not settled Securities Purchased, Not Settled Securities Purchased, Not Settled Derivative collateral offset against derivatives Variation Margin Offset Against Derivatives Variation Margin Offset Against Derivatives Dividends and distributions declared, not paid 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. Principal payments of Residential Bridge Loans, not settled Principal Payments of Residential Bridge Loans Not Settled Principal Payments of Residential Bridge Loans Not Settled Other assets - Transfer of Bridge Loans to REO Noncash or Part Noncash Acquisition, Other Assets Acquired Proceeds from sale of REO, not settled Proceeds From Sale Of Real Esate Owned, Not Settled Proceeds From Sale Of Real Esate Owned, Not Settled Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level III Fair Value, Inputs, Level 3 [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] To-Be-Announced Pricing Model (TBA) To-Be-Announced Pricing Model (TBA) [Member] To-Be-Announced Pricing Model (TBA) [Member] Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Measurement Input, Expected Term Measurement Input, Expected Term [Member] Weighted Average Weighted Average [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair value Loans held-for-sale, measurement input Loans Held-for-sale, Measurement Input Loans held-for-sale, term Loans Held-for-sale, Term Loans Held-for-sale, Measurement Input, Pricing Loans Held-for-sale, Measurement Input, Pricing Loans Held-for-sale, Measurement Input, Pricing Mortgage-Backed Securities and other securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Summarized Quarterly Results (unaudited) Quarterly Financial Information [Text Block] Commitments and Contingencies Disclosure [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] London Interbank Offered Rate (LIBOR) Floor London Interbank Offered Rate (LIBOR) Floor [Member] London Interbank Offered Rate (LIBOR) Floor [Member] 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] 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] CRE One CRE One [Member] CRE One [Member] CRE Two CRE Two [Member] CRE Two [Member] CRE Four CRE Four [Member] CRE Three [Member] CRE Five CRE Five [Member] CRE Five [Member] CRE Six CRE Six [Member] CRE Six [Member] CRE Seven CRE Seven [Member] CRE Seven [Member] CRE Eight CRE Eight [Member] CRE Eight [Member] CRE Nine CRE Nine [Member] CRE Nine [Member] CRE Ten CRE Ten [Member] CRE Ten [Member] SBC 1 Wolverine [Member] Wolverine [Member] SBC 4 KC Portfolio [Member] KC Portfolio [Member] SBC 5 CT Portfolio [Member] CT Portfolio [Member] Interest-Only Mezzanine loan Interest-Only Mezzanine Loan [Member] Interest-Only Mezzanine Loan [Member] Interest-Only First Mortgage Interest-Only First Mortgage [Member] Interest-Only First Mortgage [Member] Principal & Interest First Mortgage Principal And Interest First Mortgage [Member] Principal And Interest First Mortgage [Member] Collateral [Axis] Collateral [Axis] Collateral [Domain] Collateral [Domain] Hotel Hotel [Member] Nursing Facilities Nursing Facilities [Member] Nursing Facilities [Member] Entertainment and Retail Entertainment And Retail [Member] Entertainment And Retail [Member] Retail Retail Site [Member] Assisted Living Assisted Living Facilities [Member] Assisted Living Facilities [Member] Apartment Complex Apartment Building [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] CRE LLC And CRE Mezz CRE LLC And CRE Mezz [Member] CRE LLC And CRE Mezz [Member] RSBC Trust RSBC Trust [Member] RSBC Trust [Member] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] Coupon Rate Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Equity awards Equity Awards [Member] Represents information pertaining to equity awards. Restricted common stock Restricted Stock [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Director Director [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] June 2019 Share-based Compensation Award, Tranche Four [Member] Share-based Compensation Award, Tranche Four [Member] March 2020 Share-based Compensation Award, Tranche One [Member] June 2020 Share-based Compensation Award, Tranche Five [Member] Share-based Compensation Award, Tranche Five [Member] March 2021 Share-based Compensation Award, Tranche Two [Member] March 2022 Share-based Compensation Award, Tranche Three [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 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. Share-Based Payments Share-based Compensation Arrangement by Share-based Payment Award [Line Items] 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. Number of shares remained available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 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. Share Based Compensation Arrangement by Share Based Payment Award, Number of 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. Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Stock-based compensation expense recognized Allocated Share-based Compensation Expense Unamortized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Shares of Restricted Stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Restricted Stock Shares Outstanding, beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted Stock Shares Outstanding, end of period (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. Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at beginning of period (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 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 Outstanding at end of year (in dollars per share) 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. Offsetting [Abstract] 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. Agency CMBS Interest-Only Strips accounted for as derivatives, included in MBS Agency Commercial 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 commercial mortgage backed securities (MBS), which are accounted for as derivatives with carrying value included in MBS on the balance sheet. Agency RMBS Agency Residential Mortgage Backed Securities [Member] Agency Residential Mortgage Backed Securities [Member] Investments Classified By Contractual Maturity Date [Axis] Investments Classified By Contractual Maturity Date [Axis] Information by maturities of an entity's investments. Investments Classified By Contractual Maturity Date [Domain] Investments Classified By Contractual Maturity Date [Domain] Providing information by maturities of an entity's investments. 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. 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. 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. More than 30 years Investments Contractual Maturity Over30 Years [Member] Period of maturity for a group of investment portfolio which mature over 30 years. Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Repurchase Agreements Securities Sold under Agreements to Repurchase [Member] Whole-Loans and Securitized Commercial Loan 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. Cash Cash [Member] Collateral Positions Financial Instruments Owned and Pledged as Collateral [Line Items] Assets pledged Assets pledged- fair value Financial Instruments, Owned and Pledged as Collateral, at Fair Value Accrued interest Accrued Interest on Pledged Assets Represents the accrued interest on pledged asset. Assets pledged and accrued interest Pledged Assets Including Accrued Interest Represents the fair value of assets pledged and accrued interest. Due from counterparties Securities Loaned, Collateral, Right to Reclaim Cash Due to counterparties Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash Securities received as collateral Securities Purchased under Agreements to Resell, Fair Value of Collateral Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization Nature of Operations [Text Block] Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Residential Facility Residential Facility [Member] Residential Facility [Member] Commercial Facility Commercial Facility [Member] Commercial Facility [Member] Residential Whole Loans, at Fair Value CMSC Trust Cmsc Trust [Member] Represents CMSC Trust 2015 - Longhouse MZ ("CMSC Trust"), a VIE of the entity. Arroyo Mortgage Trust 2019-2 Arroyo Mortgage Trust 2019-2 [Member] Arroyo Mortgage Trust 2019-2 [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Securitized Debt Securitized Debt [Member] Collateralized debt obligations, including mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Third Party Third Party [Member] Third Party [Member] Convertible Debt Convertible Debt [Member] Six Point Seventy Five Percent Convertible Senior Unsecured Notes Six Point Seventy Five Percent Convertible Senior Unsecured Notes [Member] Six Point Seventy Five Percent Convertible Senior Unsecured Notes [Member] Three Point Seventy Five Percent Convertible Senior Unsecured Notes Three Point Seventy Five Percent Convertible Senior Unsecured Notes [Member] Three Point Seventy Five Percent Convertible Senior Unsecured Notes [Member] Commercial Mortgage Pass-Through Certificate, Class A Borrowings Under Repurchase Agreements Short-term Debt [Line Items] Convertible senior unsecured notes, earliest redemption period by company Debt Instrument, Convertible, Earliest Redemption Period By Company Debt Instrument, Convertible, Earliest Redemption Period By Company Number of counterparties to master repurchase agreement Number of Counterparties to Master Repurchase Agreement Represents the total number of counterparties to master repurchase agreement of the entity. Number of counterparties from whom the Company had borrowings 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. Certain characteristics of the Company's repurchase agreements Short-term Debt, Other Disclosures [Abstract] 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. Less unamortized debt issuance costs Unamortized Debt Issuance Expense Borrowings under repurchase agreements Weighted Average Interest Rate on Borrowings Outstanding at end of period Short-term Debt, Weighted Average Interest Rate, at Point in Time Long-term Debt, Weighted Average Interest Rate, at Point in Time Long-term Debt, Weighted Average Interest Rate, at Point in Time Weighted Average Remaining Maturity (days) Debt Instrument, Weighted Average Remaining Maturity Period Represents the weighted average remaining term of debt instrument. Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Convertible senior unsecured notes, conversion ratio Debt Instrument, Convertible, Conversion Ratio Commercial pass-through certificates, amount Commercial Pass-Through Certificates, Amount Commercial Pass-Through Certificates, Amount Trust certificates issued Trust Certificates Issued Amount Amount issued for trust certificates. Financing receivable, gross Financing Receivable, Gross Trust certificates, at fair value Trust Certificates, At Fair Value Trust Certificates, At Fair Value Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage 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. Securitized debt, at fair value Payments to acquire securitized debt Payments To Acquire Securitized Debt Payments To Acquire Securitized Debt Transfer of residential mortgage-backed securitization Transfer Of Residential Mortgage-backed Securitization Transfer Of Residential Mortgage-backed Securitization Fair value Debt instrument, collateral balance percentage Debt Instrument, Collateral Balance Percentage Debt Instrument, Collateral Balance Percentage Depreciation, Amortization and Accretion, Net [Abstract] Depreciation, Amortization and Accretion, Net [Abstract] Coupon Interest Investment Income Interest Operating Amount before accretion (amortization) of purchase discount (premium) of interest income on operating securities. Net (Premium Amortization/Amortization Basis) Discount Amortization Interest income Related Party Transactions Related Party Transactions Disclosure [Text Block] Summary of certain characteristics of the Company's repurchase agreements Schedule of Repurchase Agreements [Table Text Block] 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] 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] 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] 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] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Income Taxes Income Tax Disclosure [Text Block] Income Statement [Abstract] Interest Expense Schedule of gross and net information about the Company's assets and liabilities subject to master netting arrangements Offsetting Assets [Table Text Block] Subtotal Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprises Subtotal Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprises [Member] Subtotal Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprises [Member] 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. Subtotal Non-Agency RMBS Subtotal Non-Agency Residential Mortgage Backed Securities Issued By Private Enterprises [Member] Subtotal Non-Agency Residential Mortgage Backed Securities Issued By Private Enterprises [Member] Total Non-Agency MBS 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. Principal Balance Investment Owned, Balance, Principal Amount Unamortized Premium (Discount), net Available For Sale Securities, Unamortized Premium and Discount Represents the unamortized premium (discount) on available for sale securities. Discount Designated as Credit Reserve and OTTI Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Unrealized Gain Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Unrealized Loss Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 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. Notional balance Notional Balance Other Than Principal Balance Aggregate notional amount specified by the security. Expressed as an absolute value. 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. Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Effective Income Tax Rate Reconciliation, Percent [Abstract] Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State statutory rate, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent REIT earnings not subject to corporate taxes Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Effective Tax Rate Effective Income Tax Rate Reconciliation, Percent Deferred Tax Asset Deferred Tax Assets, Net [Abstract] Investments Deferred Tax Assets, Investments Deferred tax asset Deferred Tax Assets, Gross Net deferred tax asset Deferred Tax Assets, Net of Valuation Allowance Deferred Tax Liability Deferred Tax Liabilities, Net [Abstract]