Share-based Compensation [Abstract] Share-Based Payments Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Variable Interest Entities No Definition Available. Residential Whole-Loans and Bridge Loans Variable Interest Entity Disclosure [Text Block] Fair Value Disclosures [Abstract] 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] 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] 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] Schedule of fair value, by balance sheet grouping Fair Value, by Balance Sheet Grouping [Table 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] Fixed Pay Rate Fixed Income Interest Rate [Member] Variable Pay Rate Variable Income Interest Rate [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swaps Interest Rate Swap [Member] Derivative Instruments Trading Activity, Gains and Losses, Net [Line Items] Summary of the entity's derivative instruments Schedule of Derivative Instruments [Table Text Block] 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] Summary of interest rate swaps or interest rate swaptions Schedule of Interest Rate Derivatives [Table Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income (loss) Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash (used in) 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 Amortization of deferred financing costs Amortization of Debt Issuance Costs Amortization of discount on convertible senior notes 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 Investments Realized loss on sale of real estate owned (REO) Gain (Loss) on Sale of Mortgage Loans Unrealized (gain) loss on derivative instruments, net Unrealized Gain (Loss) on Derivatives Other than temporary impairment Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings Realized (gain) loss on investments, net Debt Securities, Realized Gain (Loss) (Gain) loss on derivatives, net Gain (Loss) on Sale of Derivatives 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 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 affiliate 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 Proceeds from sale of REO Proceeds from Sale of Real Estate Principal repayments and basis recovered on securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale 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. (Payments on) Proceeds from termination of futures, net Proceeds From (Payments For) Termination of Futures Proceeds From (Payments For) Termination of Futures 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 Increase Decrease In Due From Counterparties, Investing Activities The increase or decrease in due from counterparties under investing activities. 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] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock 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 issuance of convertible senior notes Proceeds from Convertible Debt 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. 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 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 in other liabilities 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 Net increase in cash, cash equivalents and restricted cash 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 Principal payments of securities, 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 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. Securities purchased, not settled Securities Purchased, Not Settled Securities Purchased, Not Settled Net unsettled TBAs Net Securities Unsettled Yet To Be Announced Represents the net unsettled amount of securities not yet announced. Dividends and distributions declared, not paid Dividends Payable 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 Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] 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). Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Secondary Offering Secondary Offering [Member] Secondary Offering [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] 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. 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 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 Sale of Stock, Number of Shares Issued in Transaction Management fees Management Fee Related Party Represents the amount of expenses for related party 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. Reimbursable employee costs incurred but not yet paid Accounts Payable, Related Parties Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Arroyo Trust Arroyo Trust [Member] Arroyo Trust [Member] 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] Non-Qualifying Adjustable Rate Mortgage Loan Non-Qualifying Adjustable Rate Mortgage [Member] Non-Qualifying Adjustable Rate Mortgage [Member] Conforming Fixed Rate Mortgage Loan Fixed Rate Residential Mortgage [Member] Investor Fixed Rate Mortgage Loan Investor Fixed Rate Mortgage [Member] Investor Fixed Rate Mortgage [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] VIE Variable Interest Entity, Primary Beneficiary [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Residential Whole Loans Residential Portfolio Segment [Member] Residential Bridge Loans Residential Bridge Loans [Member] Residential Bridge Loans [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable interest entity, primary beneficiary, aggregated disclosure Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] Variable interest entity, not primary beneficiary, aggregated disclosure Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member] RCR Trust RCR Trust [Member] RCR Trust [Member] RNR Trust RNR Trust [Member] RNR Trust [Member] Arroyo Trust Arroyo Mortgage Trust 2019-2 [Member] Arroyo Mortgage Trust 2019-2 [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Repurchase agreements, net Securities Sold under Agreements to Repurchase Transfered of non-qm residential whole loans Transfer Of Residential Mortgage-backed Securitization Transfer Of Residential Mortgage-backed Securitization Number of Loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Mortgage loans on real estate, number of loans, nonperforming Mortgage Loans on Real Estate, Number of Loans, Nonperforming Mortgage Loans on Real Estate, Number of Loans, Nonperforming 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 Loans Receivable, Fair Value Disclosure 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 Principal Balance SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages 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 Variable interest entity, nonconsolidated, number of entity Variable Interest Entity, Nonconsolidated, Number of Entity Number of variable interest entity, of which the Entity has been determined not as the primary beneficiary. 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 Foreclosed other real estate owned Other Real Estate, Foreclosed Assets, and Repossessed Assets Noncontrolling Interest [Abstract] CMSC Trust Cmsc Trust [Member] Represents CMSC Trust 2015 - Longhouse MZ ("CMSC Trust"), a VIE of the entity. RETL Trust RETL Trust [Member] RETL Trust [Member] RSBC Trust RSBC Trust [Member] RSBC Trust [Member] Commercial Mezzanine Loan Commercial Mezzanine Loan [Member] Commercial Mezzanine Loan [Member] Principal balance Loans Receivable, Gross, Commercial, Mortgage 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. Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] 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 Securities, at fair value Mortgage-backed Securities Available-for-sale, Fair Value Disclosure Residential Whole Loans, at fair value ($1,209,237 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 ($48,054 and $211,999 at fair value and $50,675 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 ($422,032 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] Convertible senior unsecured notes, net Convertible Debt, Noncurrent Securitized debt, net ($612,282 and $949,626 at fair value and $75,095 and $246,802 held by affiliates, respectively) Secured Debt Interest payable (includes $386 and $816 on securitized debt held by affiliates, respectively) Interest Payable Investment related payables Investment-related Liabilities 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 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, 53,224,379 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 Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] California CALIFORNIA New York NEW YORK Georgia GEORGIA Florida FLORIDA New Jersey NEW JERSEY Other Other States [Member] Represents all other states. Massachusetts MASSACHUSETTS Washington WASHINGTON District of Columbia DISTRICT OF COLUMBIA Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] 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. Concentration Concentration Risk, Percentage Maximum Maximum [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. 8.01 - 9.00% Residential Portfolio Segment Current Coupon Rate Five [Member] Residential Portfolio Segment Current Coupon Rate Five [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. 6.01 – 7.00% Residential Bridge Loan Current Coupon Rate Two [Member] Residential Bridge Loan Current Coupon Rate Two [Member] 7.01 – 8.00% Residential Bridge Loan Current Coupon Rate Three [Member] Residential Bridge Loan Current Coupon Rate Three [Member] 8.01 – 9.00% Residential Bridge Loan Current Coupon Rate Four [Member] Residential Bridge Loan Current Coupon Rate Four [Member] 9.01 – 10.00% Residential Bridge Loan Current Coupon Rate Five [Member] Residential Bridge Loan Current Coupon Rate Five [Member] 10.01 – 11.00% Residential Bridge Loan Current Coupon Rate Six [Member] Residential Bridge Loan Current Coupon Rate Six [Member] 11.01 – 12.00% Residential Bridge Loan Current Coupon Rate Seven [Member] Residential Bridge Loan Current Coupon Rate Seven [Member] 12.01 – 13.00% Residential Bridge Loan Current Coupon Rate Nine [Member] Residential Bridge Loan Current Coupon Rate Nine [Member] 13.01 – 14.00% Residential Bridge Loan Current Coupon Rate Ten [Member] Residential Bridge Loan Current Coupon Rate Ten [Member] 17.01 – 18.00% Residential Bridge Loan Current Coupon Rate Eight [Member] Residential Bridge Loan Current Coupon Rate Eight [Member] 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 (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. Contractual Maturity (years) Mortgage Loans on Real Estate, Contractual Maturity Contractual maturity for mortgage loan receivable on real estate. Coupon Rate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Interest Rate Swaption Interest Rate Swaption [Member] 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] Futures contracts Future [Member] Credit default swaps 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] Amounts recognized on the statements of operations related to the Company's derivatives Derivative Instruments, Gain (Loss) [Line Items] Other Settlements / Expirations Variation Margin Settlement Derivative, Variation Margin Settlement Derivative, Variation Margin Settlement Return (Recovery) of Basis 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. Contractual interest income (expense), net Interest Income (Expense), Nonoperating, Net Total Gain (Loss) on Derivative Instruments, Net, Pretax Collateral already posted, aggregate fair value Collateral Already Posted, Aggregate Fair Value Stockholders' Equity Note [Abstract] Stockholders' Equity [Table] Stockholders' Equity [Table] Schedule detailing information related to shareholders' equity. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Stock Outstanding Common Stock [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Treasury Stock Treasury Stock [Member] Shareholders equity Stockholder's Equity [Line Items] Equity offering amount, maximum Equity Offering Amount Maximum Equity Offering Amount Maximum Treasury stock (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Sale of stock, price per share (in dollars per share) Sale of Stock, Price Per Share Payments of stock issuance costs Shares authorized to be repurchased (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Dividends, declared per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends, cash paid per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Income Tax Disclosure [Abstract] Valuation Allowance [Table] Valuation Allowance [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] State Jurisdiction State and Local Jurisdiction [Member] Domestic Tax Authority Domestic Tax Authority [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Taxable REIT Subsidiary Taxable REIT Subsidiary [Member] Taxable REIT Subsidiary [Member] Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] Deferred Tax Asset [Domain] Deferred Tax Asset [Domain] Capital Loss Carryforward Capital Loss Carryforward [Member] Operating Loss Carryforwards Operating Loss Carryforwards [Member] Operating Loss Carryforwards [Member] Valuation Allowance [Line Items] Valuation Allowance [Line Items] Current federal, state and local, tax expense (benefit) Current Federal, State and Local, Tax Expense (Benefit) Deferred tax assets, gross Deferred Tax Assets, Gross Valuation allowances balance Deferred Tax Assets, Valuation Allowance Deferred tax asset, net operating losses Deferred Tax Assets, Operating Loss Carryforwards Deferred tax liabilities, net Deferred Tax Liabilities, Net Debt Disclosure [Abstract] 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] Agency RMBS(1) 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). 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. 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 CMBS Commercial Mortgage Backed Securities Issued By Private Enterprises [Member] Securities collateralized by commercial real estate mortgage loans, issued by non-governmental sponsored enterprises. Whole-Loans Whole-Loans [Member] Whole-Loans [Member] Commercial Loans Commercial Loan [Member] Securitized commercial loans Securitized Commercial Loan [Member] Represents information pertaining to the securitized commercial loan. Cash Cash [Member] Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] MBS pledged for borrowings under repurchase agreements Securities Sold under Agreements to Repurchase, Fair Value of Collateral 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. Assets pledged- fair value Financial Instruments, Owned and Pledged as Collateral, at Fair Value Earnings Per Share [Abstract] Net Income per Common Share Earnings Per Share [Text Block] Commitments and Contingencies Disclosure [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Weighted Average Weighted Average [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] 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] 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] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Loans held-for-sale, measurement input Loans Held-for-sale, Measurement Input Loans held-for-sale, term Loans Held-for-sale, Term Statement of Stockholders' Equity [Abstract] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Statement Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Beginning balance (in shares) Common Stock, Shares, Issued Proceeds from public offerings of common stock (in shares) Stock Issued During Period, Shares, New Issues 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 Equity component of convertible senior unsecured notes Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Grants of restricted stock (shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Grants of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Gross Vesting of restricted stock Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Dividends declared on common stock Dividends Treasury stock (shares) Treasury Stock, Shares, Acquired Treasury stock Treasury Stock, Value, Acquired, Cost Method Ending balance Ending balance (in shares) 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] Debt Conversion [Table] Debt Conversion [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 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] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt Convertible Debt [Member] Debt Conversion [Line Items] Debt Conversion [Line Items] Aggregate principal amount of 6.75% convertible senior unsecured notes Debt Instrument, Face Amount Interest rate stated percentage Debt Instrument, Interest Rate, Stated Percentage Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt 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 Redemption price, percentage Debt Instrument, Redemption Price, Percentage Convertible senior unsecured notes, conversion ratio Debt Instrument, Convertible, Conversion Ratio Convertible senior unsecured notes, conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Derivative [Table] Derivative [Table] Position [Axis] Position [Axis] Position [Domain] Position [Domain] Long Long [Member] Short Short [Member] Forward starting interest rate swap Forward Starting Interest Rate Swap [Member] Represents forward starting interest rate swaps. Us Treasury Futures Us Treasury Futures [Member] U.S. Treasury futures. Interest Rate Swaption, Option Portion Interest Rate Swaption, Option Portion [Member] Interest Rate Swaption, Option Portion [Member] Derivative Contract Term [Axis] Derivative Contract Term [Axis] Information pertaining to derivative contract term. Derivative Contract Term [Domain] Derivative Contract Term [Domain] Represents the term to maturity of derivative instrument. 1 year or less One Year Or Less [Member] Represents the term to maturity of derivative instruments one year or less. Greater than 3 years and less than 5 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. Greater than 5 years Greater Than Five Years [Member] Represents the term to maturity of derivative instruments greater than five years. Greater than 1 year and less than 3 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. Interest rate swaps and interest rate swaptions Derivative [Line Items] Notional Amount Derivative, Notional Amount Average Fixed Pay Rate Derivative, Average Fixed Interest Rate Average Floating Receive Rate Derivative, Average Variable Interest Rate Average Maturity (Years) Derivative, Average Remaining Maturity Notional amount, assets Derivative Asset, Notional Amount Notional amount, liabilities Derivative Liability, Notional Amount Derivative liability, at fair value Derivative Instrument, Weighted Average Forward Starting Date Derivative Instrument, Weighted Average Forward Starting Date Derivative Instrument, Weighted Average Forward Starting Date Fair value Derivative, Fair Value, Net Derivative cash collateral Derivative, Collateral, Right to Reclaim Cash Offsetting [Abstract] Offsetting Assets [Table] Offsetting Assets [Table] Derivative Instruments Excluding Interest Only Strips Accounted For As Derivatives And Linked Transactions Derivative Instruments Excluding Interest Only Strips Accounted For As Derivatives And Linked Transactions [Member] Represents derivative assets which exclude interest-only strips accounted for as derivatives and linked transactions. Offsetting Assets [Line Items] Offsetting Assets [Line Items] Derivative asset, gross amount Derivative Asset, Fair Value, Gross Asset Derivative assets, at fair value Fair value of derivative assets Derivative Asset Derivative asset, not offset Derivative Asset, Not Offset, Policy Election Deduction Net Amount Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Gross Amounts of Recognized Liabilities Derivative Liability, Fair Value, Gross Liability Securities Sold under Agreements to Repurchase, Gross Securities Sold under Agreements to Repurchase, Gross Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Derivative liabilities Repurchase Agreement Borrowings, Total 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 Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Gross Amounts Not Offset in the Balance Sheets Derivative Fair Value of Derivative Liability Gross Amounts Not Offset [Abstract] Financial Instruments Derivative, Collateral, Right to Reclaim Securities Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Securities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Securities Cash Collateral Pledged Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral Cash collateral for derivatives Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash Fair value of investments pledged against repurchase agreements Security Owned and Pledged as Collateral, Fair Value Derivative credit risk valuation adjustment, derivative assets Derivative Credit Risk Valuation Adjustment, Derivative Assets Investments, Debt and Equity Securities [Abstract] Mortgage-Backed Securities and other securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] 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. Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] 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 Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings 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 Currency swaps and forwards Derivative assets Changes in notional amount Derivative Notional Amount [Roll Forward] Notional amount at the beginning of the period Notional amount at the end of the period Accounting Policies [Abstract] Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Schedule of cash dividends declared and paid on common stock Dividends Declared [Table Text Block] Investment [Table] Investment [Table] Investment [Line Items] Investment [Line Items] Number of commercial loans trusts Variable Interest Entity, Consolidated, Number Of Commercial Loan Trusts Variable Interest Entity, Consolidated, Number Of Commercial Loan Trusts Variable interest entity, reporting entity involvement, maximum loss exposure, amount Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 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 Less: 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 Weighted Average Number of Shares Issued, Basic Weighted average common shares outstanding for diluted earnings per share Weighted Average Number of Shares Outstanding, Diluted Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted 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] 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] Subtotal Agency RMBS 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). 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 MBS Mortgage-backed Securities, Issued by Private Enterprises [Member] 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). 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 Collateralized Mortgage Backed Securities [Member] 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. 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. 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 Estimated Fair Value 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. Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Assets Assets [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Level I Fair Value, Inputs, Level 1 [Member] Level II Fair Value, Inputs, Level 2 [Member] Securitized debt Securitized Debt [Member] Collateralized debt obligations, including mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Fair Value of Financial Instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets Assets, Fair Value Disclosure [Abstract] Total Assets Assets, Fair Value Disclosure Liabilities Liabilities, Fair Value Disclosure [Abstract] Derivative liabilities Securitized debt Debt Instrument, Fair Value Disclosure Total Liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure 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] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Transfers into Level III from Level II Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Transfers from Level III into Level II Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Transfers to REO Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfer To Real Estate Owned Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfer To Real Estate Owned 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. Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Realized Gain (Loss) Included in Earnings 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. Other than temporary impairment Unrealized gains/(losses), net on assets Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Premium and discount amortization, net Ending balance 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] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 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. Principal repayments Unrealized (gains)/losses, net on liabilities Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss) Ending balance Unrealized gains/(losses), net on assets held at the end of the period Debt Securities, Unrealized Gain (Loss) Unrealized gains/(losses), net on assets held at the end of the period Unrealized Gain (Loss) on Securities Income Statement [Abstract] Affiliated Entity Affiliated Entity [Member] Interest expense (includes $964, $4,465, $4,408 and $9,672 on securitized debt held by affiliates, respectively) Interest Expense Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] 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] Restricted common stock Restricted Stock [Member] Equity awards Equity Awards [Member] Represents information pertaining to equity awards. 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. Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Director Director [Member] Management Management [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] 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. 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. Award vesting rights, percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 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 Summary of restricted common stock vesting dates Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Shares Vesting (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. Shares of Restricted Stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] 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 Cancelled/forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding, end of period (in shares) Unvested at end of year (in shares) 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 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 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. 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] Nomura Securities International, Inc. NOMURA SECURITIES INTERNATIONAL INC. [Member] NOMURA SECURITIES INTERNATIONAL INC. [Member] 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. 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] Fair Value of Financial Instruments Fair Value Disclosures [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] Related Party Transactions Related Party Transactions Disclosure [Text Block] Schedule of gross and net information about the Company's assets subject to master netting arrangements Offsetting Assets [Table Text Block] Schedule of gross and net information about the Company's liabilities subject to master netting arrangements Offsetting Liabilities [Table Text Block] 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 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 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 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 Residential Bridge Loans ($46,159 and $211,766 at fair value and $50,675 and $221,486 pledged as collateral, respectively) Residential Whole-Loan And Residential Bridge Loan Residential Whole-Loan And Residential Bridge Loan [Member] Residential Whole-Loan And Residential Bridge Loan [Member] Commercial Loans, at fair value Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value Investment related receivable 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 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 U.S. states concentration and principal balance of collateral securing residential whole-loans 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 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] Income Taxes Income Tax Disclosure [Text Block] Net Interest Income Interest Income (Expense), Net [Abstract] Interest income Interest Income, Operating Net Interest Income Interest Income (Expense), Net Other Income (Loss) Other Nonoperating Income (Expense) [Abstract] Realized gain (loss) on investments, net Debt Securities, Available-for-sale, Realized Gain (Loss) Unrealized gain (loss), net Gain (loss) on derivative instruments, net Other, net Other Nonoperating Income (Expense) Other Income (Loss) Nonoperating Income (Expense) Expenses Operating Expenses [Abstract] Management fee to affiliate Other operating expenses Other Cost and Expense, Operating General and administrative expenses: General and Administrative Expense [Abstract] 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 (benefit) provision Income Tax Expense (Benefit) Net income Net income (loss) per Common Share — Basic (in dollars per share) Net income (loss) per Common Share — Diluted (in dollars per share) Document and Entity Information Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Schedule of commercial real estate loans held Schedule of Accounts, Notes, Loans and Financing Receivable [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] Trust Certificate Trust Certificate [Member] Trust Certificate [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) Floor London Interbank Offered Rate (LIBOR) Floor [Member] London Interbank Offered Rate (LIBOR) Floor [Member] London Interbank Offered Rate (LIBOR) Cap London Interbank Offered Rate (LIBOR) Cap [Member] London Interbank Offered Rate (LIBOR) Cap [Member] 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. 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. Variable interest entity, carrying amount Variable Interest Entity, Consolidated, Carrying Amount, Assets 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. Trust certificates issued Trust Certificates Issued Amount Amount issued for trust certificates. Loans receivable, basis spread on variable rate Loans Receivable, Basis Spread on Variable Rate, During Period Variable interest entity, amount acquired, eligible risk retention Variable Interest Entity, Amount Acquired, Eligible Risk Retention Variable Interest Entity, Amount Acquired, Eligible Risk Retention Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Repurchased borrowings Debt Instrument, Repurchase Amount 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] Financings Debt Disclosure [Text Block] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Total assets Interest payable Total liabilities Debt Securities, Available-for-sale, Gain (Loss) [Abstract] Debt Securities, Available-for-sale, Gain (Loss) [Abstract] Proceeds Proceeds from Sale of Debt Securities, Available-for-sale Gross Gains Debt Securities, Available-for-sale, Realized Gain Gross Losses Debt Securities, Available-for-sale, Realized Loss Net Gain (Loss) Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Basis of Presentation and Consolidation Basis of Accounting, Policy [Policy Text Block] Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recently adopted accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Components of interest income Investment Income, 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 Commercial Loans Financing Receivables [Text Block] 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. Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Options Equity Option [Member] Derivative Instruments Derivatives, Fair Value [Line Items] Notional Amount Notional Disclosures [Abstract] Estimated Fair Value Derivative, Fair Value, Net [Abstract] Fair value of derivative assets Total derivative instruments 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] 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] SBC 1 Wolverine [Member] Wolverine [Member] SBC 2 NC Twelve [Member] NC Twelve [Member] SBC 3 Pines [Member] Pines [Member] SBC 4 KC Portfolio [Member] KC Portfolio [Member] SBC 5 CT Portfolio [Member] CT Portfolio [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 Care Living Facilities Assisted Care Living Facilities [Member] Assisted Care Living Facilities [Member] Apartment Complex Apartment Building [Member] CRE LLC And CRE Mezz CRE LLC And CRE Mezz [Member] CRE LLC And CRE Mezz [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] 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] Fair Value SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Summary of certain information about the Company's investment portfolio Debt Securities, Available-for-sale [Table Text Block]