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Accrued Liabilities PEO Name PEO Name Restricted cash Restricted Cash Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Total Interest and Dividend Income, Securities, Operating Unrealized Gain/ (Loss), net Debt Securities, Trading, Accumulated Unrealized Gain (Loss) Debt Securities, Trading, Accumulated Unrealized Gain (Loss) Period-end Weighted Average Yield Debt Securities, Weighted Average Yield Rate Debt Securities, Weighted Average Yield Rate Management fee as percentage of stockholders' equity per annum Percentage Of Shareholders Equity Per Annum Paid As Management Fees Percentage of shareholders' equity per annum paid as management fees Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Dividends to preferred stockholders Preferred Stock Dividends, Income Statement Impact Cash Collateral (Received) Pledged Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Net Amount Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Organization and Business Operations Organization, 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Basic (in USD per share) Earnings Per Share, Basic 7 to 10 years Seven To Ten Years [Member] Seven To Ten Years Non-cash collateral Derivative Asset, Fair Value Of Collateral, Securities Derivative Asset, Fair Value Of Collateral, Securities MBS Mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Schedule of Effect of Derivative Financial Instruments on Statement of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Award Type Award Type [Axis] U.S. Treasury futures contracts U.S. Treasury futures contracts Futures Contracts [Member] Futures Contracts Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings (distributions in excess of earnings) Retained Earnings (Accumulated Deficit) Net Amounts of Assets (Liabilities) Presented in the Balance Sheets Derivative Liability, Excluding Portion Related to Centrally Cleared Interest Rate Swaps Derivative Liability, Excluding Portion Related to Centrally Cleared Interest Rate Swaps Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Collateral ratio Collateral Ratio Collateral ratio. Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Net settlement (termination) of derivative instruments Proceeds From (Payments For) Settlement Or Termination Of Derivative Instruments, Net Proceeds From (Payments For) Settlement Or Termination Of Derivative Instruments, Net Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Secured Debt, Excluding Asset-Backed Securities Secured Debt, Excluding Asset-backed Securities [Member] Secured Debt, Excluding Asset-backed Securities [Member] Derivative instruments: Interest Rate Swaps, Futures Contracts And Currency Forward Contracts [Member] Interest Rate Swaps, Futures Contracts And Currency Forward Contracts [Member] Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Purchase of mortgage-backed securities Payments to Acquire Mortgage Backed Securities Payments to Acquire Mortgage Backed Securities Total liabilities and stockholders' equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Weighted Average Interest Rate Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate Securities sold under agreements to repurchase, weighted average interest rate. Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Coupon Interest Debt Securities, Coupon Interest Debt Securities, Coupon Interest Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Amount Outstanding Secured Debt, Repurchase Agreements Collateral held payable Other Secured Financings Tabular List, Table Tabular List [Table Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative General and Administrative Expense Financial liabilities: Debt Instrument, Fair Value Disclosure [Abstract] Preferred Stock - shares authorized (in shares) Preferred Stock, Shares Authorized Derivatives, Fair Value Derivatives, Fair Value [Line Items] Net change in due from counterparties and collateral held payable on derivative instruments Net Change In Due From Counterparties And Collateral Held Payable, Investing Activities Net Change In Due From Counterparties And Collateral Held Payable, Investing Activities Preferred Stock, par value $0.01 per share; 50,000,000 shares authorized: 7.50% Fixed-to-Floating Series C Cumulative Redeemable Preferred Stock: 6,742,221 and 6,854,131 shares issued and outstanding, respectively ($168,556 and $171,353 aggregate liquidation preference, respectively) Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Weighted Average Fixed Pay Rate Derivative, Average Fixed Interest Rate Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets Assets, Fair Value Disclosure Net change in due from counterparties and collateral held payable on repurchase agreements Net Change In Due From Counterparties And Collateral Held Payable On Repurchase Agreements, Financing Activities Net Change In Due From Counterparties And Collateral Held Payable On Repurchase Agreements, Financing Activities Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Cash collateral pledged on derivatives Cash Collateral Pledged On Derivatives Cash Collateral Pledged On Derivatives Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Greater than or equal to five years Debt Securities, Maturities Greater Than Or Equal To Five Years, Fair Value Debt Securities, Maturities Greater Than Or Equal To Five Years, Fair Value Additional Paid in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Offsetting Assets and Liabilities Offsetting Assets And Liabilities Disclosure [Text Block] Offsetting Assets and Liabilities Disclosure [Text Block] Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Name Trading Arrangement, Individual Name Agency CMBS Agency Commercial Mortgage Backed Securities [Member] Agency Commercial Mortgage Backed Securities [Member] Cash and cash equivalents Cash and Cash Equivalent Position [Domain] Position [Domain] Company Selected Measure Amount Company Selected Measure Amount Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Unamortized premium Debt Securities, Unamortized Premium Debt Securities, Unamortized Premium Agency CMO Agency Collateralized Mortgage Obligations [Member] Agency collateralized mortgage obligations. Gross Amounts Offset in the Balance Sheets Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset Gross Amounts of Recognized Assets (Liabilities) Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset Schedule of Certain Characteristics of our Borrowings Schedule Of Secured Borrowings [Table Text Block] Schedule of Secured Borrowings Entity Address, Address Line Two Entity Address, Address Line Two Stock, Class of Stock [Table] Stock, Class of Stock [Table] Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Derivative liabilities, at fair value Derivative Liabilities Derivative Liability Repurchase Agreement Counterparty [Line Items] Repurchase Agreement Counterparty [Line Items] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Principal repayments of repurchase agreements Repayments of Other Short-Term Debt Liabilities Offsetting Derivative Liabilities [Abstract] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Sale of stock, shares authorized (in shares) Sale of Stock, Shares Authorized Sale of Stock, Shares Authorized Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Gross unrealized losses Debt Securities, Trading, Accumulated Unrealized Loss Debt Securities, Trading, Accumulated Unrealized Loss Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Financial Instruments Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Gross Amounts of Recognized Assets (Liabilities) Derivative assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Net unrealized gains (losses) on MBS accounted for under the fair value option Fair Value, Option, Changes in Fair Value, Gain (Loss) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator (income) Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]