Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] US Treasury Securities [Member] US Treasury Securities [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] US Treasury Securities [Member] Interest Rate Swaption [Member] Interest Rate Swaption [Member] Interest Rate Swap [Member] Interest Rate Swap [Member] Future [Member] Future [Member] Put Option [Member] Put Option [Member] Purchases Of TBAs And Forward Settling Agency Securities [Member] Purchases Of TBAs And Forward Settling Agency Securities [Member] Purchases Of T B As And Forward Settling Agency Securities [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Derivative liabilities, at fair value [Member] Derivative Financial Instruments, Liabilities [Member] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Asset Class [Axis] Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Asset Class [Domain] Other derivative instruments [Member] Other Derivatives [Member] Other Derivatives [Member] TBA and Forward Settling Agency Securities [Member] TBA and Forward Settling Agency Securities [Member] TBA and Forward Settling Agency Securities [Member] Sale Of TBA And Forward Settling Agency Securities [Member] Sale Of TBA And Forward Settling Agency Securities [Member] Sale Of T B A And Forward Settling Agency Securities [Member] Fair Value by Liability Class [Axis] Liability Class [Axis] Fair Value, Liabilities, Measured on Recurring Basis, Unobservable Input Reconciliation, by Liability Class [Domain] Fair Value by Liability Class [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value Variable Interest Entity, Consolidated, Carrying Amount, Assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value Derivative Assets Derivative Asset Assets, Fair Value Disclosure Assets, Fair Value Disclosure Other Long-term Debt Other Long-term Debt Obligation to return securities borrowed under reverse repurchase agreements, at fair value Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Marketable Securities, Equity Securities Marketable Securities, Equity Securities Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Liabilities, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Transfers between hierarchy levels Transfers Between Hierarchy Levels Transfers between hierarchy levels Income Tax Disclosure [Abstract] Federal Income Tax Note [Table] Federal Income Tax Note [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Preferred Class B [Member] Preferred Class B [Member] Tax Characterization [Axis] Tax Characterization [Axis] Tax Characterization [Axis] Tax Characterization [Domain] Tax Characterization [Domain] Tax Characterization [Domain] Qualified Dividends Per Share [Member] Qualified Dividends Per Share [Member] Qualified Dividends Per Share [Member] Ordinary Income Per Share [Member] Ordinary Income Per Share [Member] Ordinary Income Per Share [Member] Long term Capital Gain [Member] Long term Capital Gain [Member] Long term Capital Gain [Member] Investments, Owned, Federal Income Tax Note [Line Items] Investments, Owned, Federal Income Tax Note [Line Items] Required Annual Distribution of Taxable Net Income Required Annual Distribution of Taxable Net Income Required Annual Distribution of Taxable Net Income Preferred Stock, Dividend Rate, Per-Dollar-Amount Preferred Stock, Dividend Rate, Per-Dollar-Amount Dividends, Preferred Stock Dividends, Preferred Stock Common Stock, Dividends, Per Share, Cash Paid Common Stock, Dividends, Per Share, Cash Paid Dividends, Common Stock Dividends, Common Stock Ordinary Income Distribution % REIT Ordinary Income Distribution % REIT Ordinary Income Distribution % Capital Gain Distribution % REIT Capital Gain Distribution % REIT Capital Gain Distribution % Excise Tax Rate Excise Tax Rate Excise Tax Rate Offsetting Assets and Liabilities [Abstract] Offsetting Assets and Liabilities [Abstract] Schedule of Financial Instruments Owned and Pledged as Collateral Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Schedules Of Securities Pledged As Collateral Under Repurchase Agreement Schedules Of Securities Pledged As Collateral Under Repurchase Agreement [Text Block] [Table Text Block] Schedules Of Securities Pledged As Collateral Under Repurchase Agreement [Text Block] [Table Text Block] Schedule of Securities and Cash Pledged as Collateral from Counterparties Schedule of Securities and Cash Pledged as Collateral from Counterparties [Table Text Block] Schedule of Securities and Cash Pledged as Collateral from Counterparties [Table Text Block] Offsetting Assets and Liabilities Offsetting Assets [Table Text Block] Offsetting Liabilities Offsetting Liabilities [Table Text Block] Available-for-sale Securities [Abstract] Schedule of Trading Securities and Other Trading Assets [Table] Trading Securities [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Trading Securities and Assets [Domain] Major Types of Debt and Equity Securities [Domain] Less Than or Equal to One Year [Member] Less Than or Equal to One Year [Member] Less Than or Equal to One Year [Member] Greater Than One Year and Less Than or Equal to Three Years [Member] Greater Than One Year and Less Than or Equal to Three Years [Member] Greater Than One Year and Less Than or Equal to Three Years [Member] Greater Than Three Years and Less Than or Equal to Five Years [Member] Greater Than Three Years and Less Than or Equal to Five Years [Member] Greater Than Three Years and Less Than or Equal to Five Years [Member] Greater Than Five Years [Member] Greater Than Five Years [Member] Greater Than Five Years [Member] Greater Than Ten Years [Member] Greater Than Ten Years [Member] Greater Than Ten Years [Member] Statement [Line Items] Statement [Line Items] Fair Value Available For Sale Securities Weighted Average Life Fair Value This item represents the weighted average life of available-for-sale agency securities by fair value. Amortized Cost Available For Sale Securities Weighted Average Life Amortized Cost This item represents the weighted average life of available-for-sale agency securities by amortized cost. Agency securities classified as available for sale, Fair value Available-for-sale Securities Agency securities classified as available for sale, Amortized cost Available-for-sale Securities, Amortized Cost Basis Weighted Average Coupon Available For Sale Securities Weighted Average Life Coupon Rate This item represents the weighted average life of available-for-sale agency securities by weighted average coupon rate. Weighted Average Yield Available For Sale Securities Weighted Average Life yield Available For Sale Securities Weighted Average Life yield Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] TBA securities Fifteen Year and Thirty Year Securities [Member] TBA securities Fifteen Year and Thirty Year Securities [Member] TBA securities [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Only And Principal Only Strip [Member] Interest Only And Principal Only Strip [Member] Interest Only And Principal Only Strip [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Agency Securities [Member] Agency Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Total agency MBS, at fair value Total Agency Securities Represents total investment in agency securities at fair value. Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value, Gross Asset Derivative, Fair Value, Net Derivative, Fair Value, Net Unrealized Gain (Loss) on Securities Unrealized Gain (Loss) on Securities Debt Instrument, Unamortized Discount (Premium), Net Debt Instrument, Unamortized Discount (Premium), Net Gain Loss on Other Debt Gain Loss on Other Debt Gain Loss on Other Debt Future Prepayment Rate Assumption Of Investment Portfolio Future Prepayment Rate Assumption Of Investment Portfolio Average future constant repayment rate assumption of Investment Portfolio. Fair value of CMO securities and interest-only strips Fair Value Of CMO Securities Directly Held The sum of the fair values, as of the date of each statement of financial position presented, of directly held CMO securities and interest-only securities including retained interest in transfers treated as sales but excluding securities held by consolidated CMO trust. Securitized CMO Securities Securitized CMO Securities The sum of the fair values, as of the date of each statement of financial position presented, of directly held CMO securities and interest-only securities including retained interest in transfers treated as sales and the fair value of securities held by consolidated CMO trusts. CMO and Interest Only, Pricincipal Only Securities, Maximum Loss Exposure CMO and Interest Only, Pricincipal Only Securities, Maximum Loss Exposure CMO and Interest Only and Pricincipal Only Securities, Maximum Loss Exposure Fair value of agency securities collaterizing debt issued by securitization trust Securities Held as Collateral, at Fair Value Principal balance of agency securities collaterizing debt issued by securitization trust Principal Balance of Securities Held as Collateral Principal Balance of Securities Held as Collateral Debt Instrument, Face Amount Debt Instrument, Face Amount Weighted Average Life Interest Only Securities Weighted Average Life Interest Only Securities Weighted Average Life Interest Only Securities Weighted Average Life Principal Only Securities Weighted Average Life Principal Only Securities Weighted Average Life Principal Only Securities Quarterly Financial Information Disclosure [Abstract] Schedule of Quarterly Financial Information Schedule of Quarterly Financial Information [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock [Member] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings (Accumulated Deficit) [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Balance, value Stockholders' Equity Attributable to Parent Balance, Preferred Stock, shares Preferred Stock, Shares Outstanding Balance, Common Stock, shares Common Stock, Shares, Outstanding Net income (loss) Net Income (Loss) Attributable to Parent Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized Gains and (Losses), Net Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Amounts reclassified from accumulated OCI Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Issuance of preferred stock Proceeds from Issuance of Preferred Stock and Preference Stock Issuance of common stock, value Stock Issued During Period, Value, New Issues Issuance of common stock, shares Stock Issued During Period, Shares, New Issues Repurchase of common stock Stock Repurchased During Period, Value Repurchase of common stock shares Stock Repurchased During Period, Shares Preferred dividends declared Dividends, Preferred Stock, Cash Common dividends declared Dividends, Common Stock, Cash Balance, value Balance, Preferred Stock, shares Balance, Common Stock, shares Organization [Abstract] Organization (Abstract) Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Pledged Assets Pledged Assets [Text Block] Pledged Assets [Text Block] Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract] Derivative [Table] Derivative [Table] Hedging Designation [Axis] Hedging Designation [Domain] Not Designated as Hedging Instrument [Member] Derivative [Line Items] Derivative [Line Items] Schedule of Outstanding Derivatives Not Designated as Hedging Instruments Schedule of Outstanding Derivatives Not Designated as Hedging Instruments [Table Text Block] Schedule of Outstanding Derivatives Not Designated as Hedging Instruments [Table Text Block] Schedule Of Interest Rate Swap Agreement By Remaining Maturity Schedule Of Interest Rate Swap Agreement By Remaining Maturity [Table Text Block] Schedule Of Interest Rate Swap Agreement By Remaining Maturity [Table Text Block] Schedule of Interest Rate Swaption Agreements Outstanding Schedule of Interest Rate Swaption Agreements Outstandin [Table Text Block] Schedule of Interest Rate Swaption Agreements Outstandin [Table Text Block] US government securities US government securities [Table Text Block] US government securities [Table Text Block] Summary of Long and Short Position of Derivative Instruments Schedule of Long and Short Position of Derivative Instruments [Table Text Block] Schedule of Long and Short Position of Derivative Instruments [Table Text Block] Schedule Of Outstanding Not Designated As Hedging Instruments Schedule Of Outstanding Not Designated As Hedging Instruments [Table Text Block] Schedule Of Outstanding Not Designated As Hedging Instruments [Table Text Block] Major Types of Debt and Equity Securities [Domain] Fixed Income Securities [Member] Fixed Income Securities [Member] Adjustable-Rate [Member] Adjustable-Rate [Member] Adjustable-Rate [Member] Collateralized Mortgage Obligations [Member] Collateralized Mortgage Obligations [Member] Amortized cost Agency Securities Gross Unrealized Gain Agency Securities Gross Unrealized Gain This item represents the gross unrealized gains for agency securities, at a point in time. Agency Securities Gross Unrealized Loss Agency Securities Gross Unrealized Loss Agency Securities Gross Unrealized Loss Available-for-sale Securities Trading Securities, Cost Trading Securities, Cost Trading Securities, Other Trading Securities, Other Agency Securities Amortized Cost Agency Securities Amortized Cost This item represents agency securities by type net of adjustments including accretion, amortization, collection of cash, previous other-than -temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Disclosure of Repurchase Agreements [Abstract] Weighted Average Life of Other Debt Weighted Average Life Other Debt Weighted Average Life Other Debt Debt Instrument, Description of Variable Rate Basis, LIBOR Debt Instrument, Description of Variable Rate Basis Spread Over LIBOR Spread Over LIBOR Spread Over LIBOR Fair Value Measurements Fair Value Disclosures [Text Block] Derivatives By Maturity [Axis] Derivatives By Maturity [Axis] Derivatives By Maturity [Axis] Derivatives by Maturity [Domain] Derivatives by Maturity [Domain] Derivatives by Maturity [Domain] Greater Than Five Years and Less than or Equal to Seven Years [Member] Greater Than Five Years and Less than or Equal to Seven Years [Member] Greater Than Five Years and Less than or Equal to Seven Years [Member] Greater Than Seven Years and Less than or Equal to Ten Years [Member] Greater Than Seven Years and Less than or Equal to Ten Years [Member] Greater Than Seven Years and Less than or Equal to Ten Years [Member] Forward Contracts [Member] Forward Contracts [Member] Interest Rate Swaps Excluding Forward Starting [Member] Interest Rate Swaps Excluding Forward Starting [Member] Interest Rate Swaps Excluding Forward Starting [Member] Derivative Position [Axis] Derivative Position [Axis] Derivative Position [Axis] Derivative Position [Domain] Derivative Position [Domain] Derivative Position [Domain] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] Discontinuation of Election to Account for Interest Rate Swaps as Designated Cash Flow Hedges [Member] Discontinuation of Election to Account for Interest Rate Swaps as Designated Cash Flow Hedges [Member] Discontinuation of Election to Account for Interest Rate Swaps as Designated Cash Flow Hedges [Member] Derivative Instrument Risk [Axis] Derivative Contract [Domain] Receiver Interest Rate Swaps [Member] Receiver Swaption [Member] Receiver Swaption [Member] Average Receive Rate Derivative, Average Variable Interest Rate Net Estimated Fair Value Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net Notional Amount Derivative Liability, Notional Amount Average Fixed Pay Rate Derivative, Average Fixed Interest Rate Average Maturity (Years) Derivative, Average Remaining Maturity Derivative, Notional Amount Derivative, Notional Amount Derivative, Higher Remaining Maturity Range Derivative, Higher Remaining Maturity Range Consolidated Balance Sheet (Parenthetical) [Abstract] Consolidated Balance Sheet (Parenthetical) [Abstract] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Available-for-sale Securities Pledged as Collateral Available-for-sale Securities Pledged as Collateral Trading Securities Pledged as Collateral Trading Securities Pledged as Collateral Assets Pledged included in Receivable for Securities Sold Assets Pledged included in Receivable for Securities Sold Assets Pledged included in Receivable for Securities Sold Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued Preferred Stock, Shares Outstanding Pref'd Stock Liquidation Preference Pref'd Stock Liquidation Preference Pref'd Stock Liquidation Preference Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Guarantor Obligations by Underlying Asset Class [Axis] Underlying Asset Class [Axis] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Agency MBS sold, at cost Cost Of Sale Of Available For Sale Secuities CostOfSaleOfAvailableForSaleSecuities Proceeds from agency MBS sold Proceeds from Sale of Available-for-sale Securities Net gain (loss) on sale of agency MBS Gain (Loss) on Sales of Mortgage Backed Securities (MBS) Gross gain on sale of agency MBS Marketable Securities, Realized Gain (Loss) Gross loss on sale of agency MBS Available-for-sale Securities, Gross Realized Losses Statement of Financial Position [Abstract] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Statement, Scenario [Axis] Assets: Assets [Abstract] Agency securities, at fair value (including pledged securities of $51,629 and $62,205, respectively) Agency securities transferred to consolidated variable interest entities, at fair value (pledged securities) U.S. Treasury securities, at fair value (including pledged securities of $2,375 and $3,778, respectively) REIT equity securities, at fair value Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Derivative assets, at fair value Receivable for securities sold (including pledged securities of $79 and $622, respectively) Receivables from Brokers-Dealers and Clearing Organizations Receivable under reverse repurchase agreements Receivable Under Reverse Repurchase Agreements Receivable Under Reverse Repurchase Agreements Other assets Other Assets Total assets Assets Liabilities: Liabilities [Abstract] Repurchase agreements Securities Sold under Agreements to Repurchase Other debt Payable for agency securities purchased Payables to Broker-Dealers and Clearing Organizations Derivative liabilities, at fair value Derivative Liability Dividend payable Dividends Payable Obligation to return securities borrowed under reverse repurchase agreements, at fair value Accounts payable and other accrued liabilities Accounts Payable and Accrued Liabilities Total liabilities Liabilities Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock - $0.01 par value; 10.0 shares authorized: Redeemable Preferred Stock; $0.01 par value; 6.9 shares issued and outstanding (aggregate liquidation preference of $348 and $173, respectively) Preferred Stock, Value, Issued Common stock - $0.01 par value; 600.0 shares authorized; 352.8 and 356.2 shares issued and outstanding, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings (deficit) Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Equity Components [Axis] At the Market Offering Program [Member] At the Market Offering Program [Member] At the Market Offering Program [Member] Equity Interest Type [Axis] Equity Interest Type [Axis] Equity Interest Issued or Issuable, Type [Domain] Equity Interest Issued or Issuable, Type [Domain] At-the-Market Offering Program [Member] At-the-Market Offering Program [Member] At-the-Market Offering Program [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Price Share Price Proceeds from Issuance of Common Stock Proceeds from Issuance of Common Stock Common Stock, Capital Shares Reserved for Future Issuance Common Stock, Capital Shares Reserved for Future Issuance Unrealized Loss Position For - Estimated Fair Value - Less than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Unrealized Loss Position For - Unrealized Loss - Less than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss Unrealized Loss Position For - Estimated Fair Value - 12 Months or More Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Unrealized Loss Position For - Unrealized Loss - 12 Months or More Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss Unrealized Loss Position For - Estimated Fair Value - Total Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Unrealized Loss Position For - Unrealized Loss - Total Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss Derivative and Other Hedging Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Each Director [Member] Each Director [Member] Each Director [Member] Director [Member] Director [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock [Member] Restricted Stock [Member] Restricted Stock or Unit Expense Restricted Stock or Unit Expense Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, 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 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Share-based Compensation Share-based Compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Beginning OCI Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Reversal of Unrealized (Gains) and Losses, Net on Realization Other Comprehensive Income Reclassification Adjustment For Sale Of Security Reversal Of Prior Period Unrealized Gain And Losses On Realization Other Comprehensive Income Reclassification Adjustment For Sale Of Security Reversal Of Prior Period Unrealized Gain And Losses On Realization Ending OCI Balance Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Pledged Assets [Abstract] Pledged Assets [Abstract] Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Securities or Other Assets Sold under Agreements to Repurchase, Maturity Periods [Axis] Securities or Other Assets Sold under Agreements to Repurchase, Maturity Periods [Axis] Assets Sold under Agreements to Repurchase, Maturity Period [Domain] Assets Sold under Agreements to Repurchase, Maturity Period [Domain] Maturity up to 30 days [Member] Maturity up to 30 days [Member] Maturity 31 To 59 Days [Member] Maturity 31 To 59 Days [Member] Maturity 31 To 59 Days [Member] Maturity 60 To 90 Days [Member] Maturity 60 To 90 Days [Member] Maturity 60 To 90 Days [Member] Maturity over 90 days [Member] Maturity over 90 days [Member] Maturity Overnight [Member] Maturity Overnight [Member] Offsetting Assets and Liabilities [Line Items] Offsetting Assets and Liabilities [Line Items] [Line Items] for Offsetting Assets and Liabilities [Table] Security Owned and Pledged as Collateral, Fair Value Security Owned and Pledged as Collateral, Fair Value Agency Securities Pledged As Collateral Amortized Cost Agency Securities Pledged As Collateral Amortized Cost Item represents agency securities pledged as collateral at amortized cost. Agency Securities Pledged As Collateral Accrued Interest Agency Securities Pledged As Collateral Accrued Interest Item represents accrued interest on agency securities pledged as collateral. Net Unrealized Gain (Loss) on Swaps Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge Total Accumulated OCI Balance OCI before reclassifications Amounts reclassified from accumulated OCI Amounts reclassified from accumulated OCI Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, De-Designated Interest Rate Swaps Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, De-Designated Interest Rate Swaps Total Accumulated OCI Balance Total Reclass of Other Comprehensive Income Total Reclass of Other Comprehensive Income Related Party Transactions [Abstract] Management fees Management Fee Expense Related Party Transaction, Expenses from Transactions with Related Party Related Party Transaction, Expenses from Transactions with Related Party Accounts Payable, Related Parties, Current Accounts Payable, Related Parties, Current Derivative Instruments and Hedging Activities Disclosure [Abstract] Asset Class [Domain] TBA and Forward Settling Agency Securities [Member] Measurement Frequency [Axis] Fair Value Hierarchy [Domain] Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Financial Instruments Sold, Not yet Purchased, US Government and Agency Obligations Financial Instruments Sold, Not yet Purchased, US Government and Agency Obligations government bonds owned and sold short net government bonds owned and sold short net government bonds owned and sold short net Proceeds from Securities Purchased under Agreements to Resell Proceeds from Securities Purchased under Agreements to Resell Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Entity Filer Category Entity Filer Category Current Fiscal Year End Date Current Fiscal Year End Date Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Trading Symbol Trading Symbol Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Dividend Reinvestment And Direct Stock Purchase Plan [Member] Dividend Reinvestment And Direct Stock Purchase Plan [Member] Dividend Reinvestment And Direct Stock Purchase Plan [Member] Equity [Abstract] Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Investments [Abstract] IInvestment Securities Investment In Agency Securities Text Block Tabular disclosure of investment in agency securities which consist of securities for which the principal and interest payments are guaranteed by government-sponsored entities ("GSEs"), such as the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Mortgage Corporation ("Freddie Mac"), or by a U.S. Government agency, such as the Government National Mortgage Association ("Ginnie Mae"). Agency securities include securities remeasured at fair value through earnings and available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. At Par Value [Member] At Par Value [Member] At Par Value [Member] At Cost Basis [Member] At Cost Basis [Member] At Cost Basis [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Fair Value Hedging [Member] Fair Value Hedging [Member] 5 Year Maturity [Member] 5 Year Maturity [Member] 5 Year Maturity [Member] 7 Years Maturity [Member] 7 Years Maturity [Member] 7 Years Maturity [Member] 10 Year Maturity [Member] 10 Year Maturity [Member] 10 Year Maturity [Member] Schedule of Borrowings under Repurchase Agreements and Weighted Average Interest Rates Schedule of Borrowings under Repurchase Agreements and Weighted Average Interest Rates [Table Text Block] Schedule of Borrowings under Repurchase Agreements and Weighted Average Interest Rates [Table Text Block] Quarterly Results Quarterly Financial Information [Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Amortization of agency securities premiums and discounts, net Accretion (Amortization) of Discounts and Premiums, Investments Amortization of accumulated other comprehensive loss on interest rate swaps de-designated as qualifying hedges Gain on sale of agency securities, net Loss (gain) on derivative instruments and other securities, net Loss On Derivative Instruments And Trading Securities Net Loss on derivative instruments and trading securities, net Decrease (increase) in other assets Increase (Decrease) in Other Operating Assets Increase (decrease) in accounts payable and other accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Accretion of discounts on debt of consolidated variable interest entities Amortization of Debt Discount (Premium) Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of agency securities Payments to Acquire Mortgage Backed Securities (MBS) categorized as Available-for-sale Proceeds from sale of agency securities Proceeds from Sale of Mortgage Backed Securities (MBS) categorized as Available-for-sale Principal collections on agency securities Proceeds From Principal Collection Of Mortgage Backed Securities Categorized As Available For Sale The cash inflow from collection of principal from borrowers on mortgage backed securities held. Purchases of U.S. Treasury securities Payments to Acquire Available-for-sale Securities Proceeds from sale of U.S. Treasury securities Net (payments on) proceeds from reverse repurchase agreements Proceeds from (Payments for) Securities Purchased under Agreements to Resell Net proceeds from (payments on) other derivative instruments Payments for (Proceeds from) Derivative Instrument, Financing Activities Purchases of REIT equity securities Payments to Acquire Marketable Securities Proceeds from sale of REIT equity securities Proceeds from Sale and Maturity of Marketable Securities (Increase) decrease in restricted cash Increase (Decrease) in Restricted Cash Other investing cash flows, net Payments for (Proceeds from) Other Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from repurchase arrangements, net Proceeds from Short-term Debt Repayments on repurchase agreements Repayments of Short-term Debt Proceeds from debt of consolidated variable interest entities Proceeds from debt of consolidated variable interest entities Proceeds from debt of consolidated variable interest entities Repayments on debt of consolidated variable interest entities Repayments of Other Debt Net proceeds from preferred stock issuance Net proceeds from common stock issuance Payments made on common stock repurchases Payments for Repurchase of Common Stock Cash dividends paid Payments of Dividends Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Interest paid Interest Paid Taxes paid Income Taxes Paid Position [Axis] Position [Axis] Position [Domain] Position [Domain] Short [Member] Short [Member] Long [Member] Long [Member] Derivative Liability, Fair Value, Gross Liability Derivative Liability, Fair Value, Gross Liability Notional Amount Derivative, Forward Settlement Value Derivative, Forward Settlement Value Derivative, Forward Settlement Value Risk Of Repurchase Agreement To Stockholders Equity Risk Of Repurchase Agreement To Stockholders Equity Risk Of Repurchase Agreement To Stockholders Equity Credit Derivative, Maximum Exposure, Undiscounted Credit Derivative, Maximum Exposure, Undiscounted Dividends Declared Dividends Declared [Table Text Block] Subsequent Event Subsequent Events [Text Block] Income Statement [Abstract] Interest income: Interest Income (Expense), Net [Abstract] Interest income Interest Income, Securities, Mortgage Backed Interest expense Interest Expense Net interest income Interest Income (Expense), Net Other income, net: Noninterest Income [Abstract] Gain on sale of agency securities, net (Loss) gain on derivative instruments and other securities, net Gain (loss) on derivative instruments and other securities, net Gain (loss) on derivative instruments and other securities, net Total other income, net Noninterest Income Expenses: Noninterest Expense [Abstract] Management fees General and administrative expenses General and Administrative Expense Total expenses Operating Expenses (Loss) income before income tax Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income tax, net Excise and REIT Income tax Excise and REIT Income tax Net (loss) income Dividend on preferred stock Preferred Stock Dividends, Income Statement Impact Net (loss) income (attributable) available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, De-Designated Interest Rate Swaps Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) available (attributable) to common shareholders Comprehensive income available to common shareholders Comprehensive income available to common shareholders Weighted average number of common shares outstanding-basic and diluted (shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Net (loss) income per common share - basic and diluted (dollars per share) Earnings Per Share, Basic and Diluted Comprehensive (loss) income per common share - basic and diluted Comprehensive income per share - basic and diluted Comprehensive income per share - basic and diluted Derivatives by Maturity [Domain] greater than two years less than or equal to three years [Member] greater than two years less than or equal to three years [Member] greater than two years less than or equal to three years [Member] greater than four years less than or equal to five years [Member] greater than four years less than or equal to five years [Member] greater than four years less than or equal to five years [Member] Receiver Swaption [Member] Payer Swaption [Member] Payer Swaption [Member] Payer Swaption [Member] Cost Options At Cost Options At Cost Notional Amount Average Receive Rate (LIBOR) Interest Rate Derivative Not Designated As Hedging Instruments Receive Rate Interest Rate Derivative Not Designated As Hedging Instruments Receive Rate Fair Value Interest Rate Derivatives, at Fair Value, Net Average Months to Expiration Cash Flow Hedges Derivative Instruments Not Designated As Hedging Instruments Average Months To Expiration Cash Flow Hedges Derivative Instruments Not Designated As Hedging Instruments Average Months To Expiration Interest Rate Swaps [Member] Interest Rate Swaps [Member] Interest Rate Swaps [Member] Unrealized gain on derivative instruments, net Net Periodic Interest Rate Costs on Swaps Net Periodic Interest Rate Costs on Swaps Net Periodic Interest Rate Costs on Swaps Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge Deferred gain loss discontinued interest rate swap expected to be reclassified from OCI to interest expense next twelve months Deferred gain loss discontinued interest rate swap expected to be reclassified from OCI to interest expense next twelve months Deferred gain loss discontinued interest rate swap expected to be reclassified from OCI to interest expense Management Agreement and Related Party Transactions Related Party Transactions Disclosure [Text Block] Repurchase Agreements And Other Debt Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Schedule of Assets Sold under Agreements to Repurchase [Table] Schedule of Assets Sold under Agreements to Repurchase [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Repurchase Agreements [Member] Repurchase Agreements [Member] Assets Sold under Agreements to Repurchase, Maturity Periods [Axis] 30 Days or Less [Member] 2 to 3 Months thirty one to ninety [Member] thirty one to ninety [Member] 4 to 6 Months 4 to 6 Months [Member] 4 to 6 Months [Member] 7 to 9 Months 7 to 9 months [Member] 7 to 9 months [Member] 10 to 12 Months 10 to 12 Months [Member] 10 to 12 Months [Member] 13 to 24 Months 13 to 24 Months [Member] 13 to 24 Months [Member] 25 to 36 Months 25 to 36 months [Member] 25 to 36 months [Member] 37 to 48 months 37 to 48 months [Member] 37 to 48 months [Member] 49 to 60 Months 49 to 60 Months [Member] 49 to 60 Months [Member] Repurchase Agreements Weighted Average Interest Rate Short-term Debt, Weighted Average Interest Rate Weighted Average Days to Maturity Repurchase Agreements Weighted Average Days To Maturity Repurchase Agreements Weighted Average Days To Maturity Excise and Sales Taxes Excise and Sales Taxes Income Tax Expense (Benefit) Income Tax Expense (Benefit) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Preferred Class A [Member] Preferred Class A [Member] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Series B Preferred Stock [Member] Series B Preferred Stock [Member] Preferred Stock, Capital Shares Reserved for Future Issuance Preferred Stock, Capital Shares Reserved for Future Issuance Preferred Stock, Dividend Rate, Percentage Preferred Stock, Dividend Rate, Percentage Preferred Stock Authorized, but not Issued Preferred Stock Authorized, but not Issued Preferred Stock Authorized, but not Issued Sale of Stock, Price Per Share Sale of Stock, Price Per Share Preferred Stock, Liquidation Preference Per Share Preferred Stock, Liquidation Preference Per Share Preferred Stock, Value, Issued Hedging Designation [Axis] Hedging Designation [Domain] Not Designated as Hedging Instrument [Member] Interest Only And Principal Only Strip [Member] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Put Option [Member] Notional Amount Additions Notional Amount Of Derivatives Not Designated As Hedging Instruments Additions During The Period Notional Amount Of Derivatives Not Designated As Hedging Instruments Additions During The Period Settlement, Expirations or Exercise Notional Amount Of Derivatives Not Designated As Hedging Instruments Settlement Expiration During The Period Notional Amount Of Derivatives Not Designated As Hedging Instruments Settlement Expiration During The Period Notional Amount Amount Gain/(Loss) Recognized in Income on Derivatives Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Trading Securities Trading Securities Trading Securities Added During the Period Trading Securities Added During the Period Trading Securities Added During the Period Notional Amount Of Trading Securities Settlement Expiration During The Period Notional Amount Of Trading Securities Settlement Expiration During The Period Notional Amount Of Trading Securities Settlement Expiration During The Period Variable Interest Entity, Measure of Activity, Expense Variable Interest Entity, Measure of Activity, Expense Gain (loss) on REIT Equity Securities Gain (loss) on REIT Equity Securities Gain (loss) on REIT Equity Securities Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Treasury Stock Acquired, Average Cost Per Share Treasury Stock Acquired, Average Cost Per Share Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Required distribution of taxable net income on a annual basis Intended annual distribution of taxable net income Intended Annual Distribution of Taxable Net Income Intended Annual Distribution of Taxable Net Income Stockholders' Equity Note [Abstract] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Interest income Interest expense Net interest income (Loss) gain on derivative instruments and other securities, net Total other (loss) income, net General and administrative expenses Total expenses Income (loss) before income tax Provision for income tax, net Net income (loss) Dividend on preferred stock Net income (loss) available (attributable) to common shareholders Other comprehensive (loss) income Comprehensive (loss) income Comprehensive (loss) income (attributable) available to common shareholders Weighted average number of common shares outstanding-basic and diluted Net income (loss) per common share - basic and diluted Dividends declared per common share Common Stock, Dividends, Per Share, Declared Reverse Repurchase Agreements [Member] Reverse Repurchase Agreements [Member] Reverse Repurchase Agreements [Member] Liability [Member] Liability [Member] Assets [Member] Assets [Member] Swaption [Member] Swaption [Member] Gross Amounts of Recognized Assets Gross Amount of Recognized Assets (Liabilities) Fair value before effects of master netting arrangements, of a financial asset or liability or other contract and the contract can be net settled by means outside the contract or delivery of an asset or liability. Net Amounts of Assets Presented in the Consolidated Balance Sheets Net Amount of Assets (Liabilities) Presented on the Balance Sheet Fair value after effects of master netting arrangements, of a financial asset or liability or other contract and the contract can be net settled by means outside the contract or delivery of an asset or liability. Financial Instruments Gross Amounts of Financial Instruments Not Offset on the Balance Sheet Fair value of financial asset or liability or other contract elected not to be offset against an obligation to return collateral or right to receive collateral pledged under a master netting arrangement. Collateral Received Gross Amounts of Cash Collateral Not Offset on the Balance Sheet Gross Amounts of Cash Collateral Not Offset on the Balance Sheet Net Amount Net Amount After Deducting Gross Amounts Not Offset on the Balance Sheet From Net Amount of Assets (Liabilities) Presented on the Balance Sheet Net amount after deducting gross amounts not offset on the balance sheet from net amount of assets (liabilities) presented on the balance sheet. Income Taxes Income Tax Disclosure [Text Block] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Derivative [Member] Derivative [Member] Investment Securities Class [Axis] Investment Securities Class [Axis] Investment Securities Class [Domain] Investment Securities Class [Domain] Assets Pledged to Us [Member] Assets Pledged to Us [Member] Assets Pledged to Us [Member] Restricted Cash and Securities Pledged Restricted Cash and Securities Pledged Restricted Cash and Securities Pledged Restricted Cash and Cash Equivalents Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value Schedule of Investments [Table] Schedule of Investments [Table] Fannie Mae Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Freddie Mac Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Ginnie Mae Government National Mortgage Association Certificates and Obligations (GNMA) [Member] Eligible Item or Group for Fair Value Option [Axis] Eligible Item or Group for Fair Value Option [Axis] Fair Value, Option, Eligible Item or Group [Domain] Fair Value, Option, Eligible Item or Group [Domain] Available-for-sale Securities [Member] Available-for-sale Securities [Member] Agency securities remeasured at fair value through earnings [Member] Agency securities remeasured at fair value through earnings [Member] Agency Securities Remeasured At Fair Value Through Earnings [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Agency MBS, par Available For Sale Securities Par Available For Sale Securities Par Unamortized discount Debt Instrument, Unamortized Discount Unamortized premium Debt Instrument, Unamortized Premium Gross unrealized gains Available-for-sale Securities, Gross Unrealized Gain Gross unrealized losses Available-for-sale Securities, Gross Unrealized Loss Total available-for-sale agency MBS, at fair value Available-for-sale Securities, Debt Securities Interest-only and principal-only strips, amortized cost Interest Rate Derivative Assets at Amortized Cost Interest Rate Derivative Assets at Amortized Cost Gross unrealized gains Unrealized Gain on Derivatives Unrealized Gain on Derivatives Gross unrealized losses Unrealized Loss on Derivatives Unrealized Loss on Derivatives Total agency MBS remeasured at fair value through earnings Interest Rate Derivative Assets, at Fair Value Total agency MBS, at fair value Weighted average coupon Debt, Weighted Average Interest Rate Weighted average yield Weighted Average Yield Percentage WeightedAverageYieldPercentage Weighted average yield for the year ended Weighted Average Yield Percentage for Period Weighted Average Yield Percentage Year Ended Unamortized Principal Balance Of Interest Only Strips Unamortized Principal Balance Of Interest Only Strips Unamortized Principal Balance Of Interest Only Strips Weighted Average Contractual Interest Rate Of Interest Only Strips Weighted Average Contractual Interest Rate Of Interest Only Strips Weighted Average Contractual Interest Rate Of Interest Only Strips Unamortized Principal Balance Of Principal Only Strips Unamortized Principal Balance Of Principal Only Strips Unamortized principal balance of principal only strips Future Prepayment Rate Assumption Of Investment Portfolio New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Basis of Presentation and Consolidation Basis of Presentation and Significant Accounting Policies [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Accumulated Other Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Investment Securities Investment, Policy [Policy Text Block] Interest Income Interest Income [Policy Text Block] Interest Income [Policy Text Block] Repurchase and Resale Agreements Repurchase and Resale Agreements Policy [Policy Text Block] Reverse Repurchase Agreements and Obligation to Return Securities Borrowed under Reverse Repurchase Agreements Reverse Repurchase Agreements Policy [Policy Text Block] Reverse Repurchase Agreements Policy [Policy Text Block] Manager Compensation Management and Investment Advisory Fees, Policy [Policy Text Block] Derivative Instruments Derivatives, Policy [Policy Text Block] Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Excluding Cash Received [Member] Excluding Cash Received [Member] Excluding Cash Received [Member] Under Prime Broker Agreements [Member] Under Prime Broker Agreements [Member] Under Prime Broker Agreements [Member] Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Includes Sold But Not Yet Settled Securities [Member] Includes Sold But Not Yet Settled Securities [Member] Includes Sold But Not Yet Settled Securities [Member] Accrued interest on pledged securities Available For Sale Securities Pledged As Collateral Accrued Interest AvailableForSaleSecuritiesPledgedAsCollateralAccruedInterest Total Fair Value Of Agency Securities Pledged And Accrued Interest Total Fair Value Of Agency Securities Pledged And Accrued Interest Total Fair Value Of Agency Securities Pledged And Accrued Interest Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Components of Investment Securities Components of Investment Securities [Table Text Block] Components of Investment Securities [Table Text Block] Agency Securities Agency Securities [Table Text Block] Agency Securities [Table Text Block] Summary Of Agency Securities Estimated Weighted Average Life Classifications Summary of Agency Securities Estimated Weighted Average Life Classifications [Table Text Block] Summary of Agency Securities Estimated Weighted Average Life Classifications [Table Text Block] Summary of Changes in Accumulated OCI for Agency Securitie Summary of Changes in Accumulated OCI for Agency Securitie [Table Text Block] Summary of Changes in Accumulated OCI for Agency Securitie [Table Text Block] Summary of Continuous Unrealized Loss Position of Available for Sale Securities Summary of Continuous Unrealized Loss Position of Available for Sale Securities [Table Text Block] Summary of Continuous Unrealized Loss Position of Available for Sale Securities [Table Text Block] Summary of Net Gain from Sale of Agency Securities Summary of Net Gain from Sale of Agency Securities [Table Text Block] Summary of Net Gain from Sale of Agency Securities [Table Text Block]