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Other assets Other Assets Total assets Assets Liabilities: Liabilities [Abstract] Repurchase agreements Securities Sold under Agreements to Repurchase Other debt Other Long-term 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 Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value 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, Value, Issued Preferred Stock, Value, Issued 7.750% Series B Cumulative Redeemable Preferred Stock; $0.01 par value; on an adjusted basis, 7.0 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As 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] Put Option [Member] Put Option [Member] Interest Rate Swaps [Member] Interest Rate Swaps [Member] Interest Rate Swaps [Member] Receiver Interest Rate Swaps [Member] Receiver Interest Rate Swaps [Member] Receiver Interest Rate Swaps [Member] Payer Swaption [Member] Payer Swaption [Member] Payer Swaption [Member] Receiver Swaption [Member] Receiver Swaption [Member] Receiver Swaption [Member] US Treasury Securities [Member] US Treasury Securities [Member] Markit IOS Total Return Swaps - Long [Member] Markit IOS Total Return Swaps - Long [Member] Markit IOS Total Return Swaps - Long [Member] Markit IOS Total Return Swaps - Short [Member] Markit IOS Total Return Swaps - Short [Member] Markit IOS Total Return Swaps - Short [Member] Option Indexed to Issuer's 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Instruments Additions During The Period Additions Due to Hedge De-Designations Notional Amount Of Derivatives Not Designated As Hedging Instruments additions due to Hedge De-Designations Notional Amount Of Derivatives Not Designated As Hedging Instruments additions due to Hedge De-Designations 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 Amount Gain/(Loss) Recognized in Income on Derivatives Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Trading Securities Trading Securities Derivative, Net Hedge Ineffectiveness Gain (Loss) Derivative, Net Hedge Ineffectiveness Gain (Loss) Pledged Assets [Abstract] Pledged Assets [Abstract] Schedule of Trading Securities and Other Trading Assets [Table] Trading Securities [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Assets Pledged to Us [Member] Assets Pledged to Us [Member] Assets Pledged to Us [Member] 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] 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] 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] Repurchase Agreements [Member] Repurchase Agreements [Member] Investment Securities Class [Axis] Investment Securities Class [Axis] Investment Securities Class [Domain] Investment Securities Class [Domain] US Treasury Securities [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] Reverse Repurchase Agreements [Member] Reverse Repurchase Agreements [Member] Reverse Repurchase Agreements [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Agency Securities [Member] Agency Securities [Member] Schedule of Trading Securities and Other Trading Assets [Line Items] Schedule of Trading Securities and Other Trading Assets [Line Items] Security Owned and Pledged as Collateral, Fair Value Security Owned and Pledged as Collateral, Fair Value Available-for-sale Securities Pledged as Collateral Available-for-sale Securities Pledged as Collateral Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value Available For Sale Securities Pledged As Collateral Accrued Interest Available For Sale Securities Pledged As Collateral Accrued Interest AvailableForSaleSecuritiesPledgedAsCollateralAccruedInterest Restricted Cash and Cash Equivalents 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 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. 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Rate Swaption Agreements Outstandin [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 [Table Text Block] Schedule Of Outstanding Not Designated As Hedging Instruments [Table Text Block] Schedule Of Outstanding Not Designated As Hedging Instruments [Table Text Block] Organization [Abstract] Organization (Abstract) Required distribution of taxable net income on a annual basis Required Annual Distribution of Taxable Net Income Required Annual Distribution of Taxable Net Income Intended Annual Distribution of Taxable Net Income Intended Annual Distribution of Taxable Net Income Intended Annual Distribution of Taxable Net Income Income Taxes [Abstract] Income Taxes [Abstract] Schedule of Dividends Paid [Table] Schedule of Dividends Paid [Table] Schedule of Dividends Paid [Table] 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] Schedule of Dividends Paid [Line Items] Schedule of Dividends Paid [Line Items] [Line Items] for Schedule of Dividends Paid [Table] Dividends Declared [Table Text Block] Dividends Declared [Table Text Block] Preferred Stock, Dividend Rate, Per-Dollar-Amount Preferred Stock, Dividend Rate, Per-Dollar-Amount Common Stock, Dividends, Per Share, Cash Paid Common Stock, Dividends, Per Share, Cash Paid Dividends, Common Stock Dividends, Common Stock Dividends, Preferred Stock Dividends, Preferred Stock 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] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [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] Fair Value Disclosures [Text Block] Fair Value Disclosures [Text Block] Available-for-sale Securities [Abstract] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] 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 Stockholders' Equity Note [Abstract] Stockholders' Equity [Table] Stockholders' Equity [Table] Stockholders' Equity [Table] Interest Rate Swaps [Member] Schedule of Trading Securities and Other Trading Assets, Major Types of Trading Securities and Assets [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Variable Interest Entity, Measure of Activity, Expense Variable Interest Entity, Measure of Activity, Expense 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 Share-based Compensation Share Price Share Price Common Stock, Shares, Issued Common Stock, Shares, Issued Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Treasury Stock Acquired, Average Cost Per Share Treasury Stock Acquired, Average Cost Per Share Stock Repurchased During Period, Value Stock Repurchased During Period, Value Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax 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 Other Comprehensive Income Reclassification Adjustment For Sale Of Security Reversal Of Prior Period Unrealized Gain And Losses On Realization Total Reclass of Other Comprehensive Income Total Reclass of Other Comprehensive Income Total Reclass of Other Comprehensive Income net current period other comprehensive income net current period other comprehensive income net current period other comprehensive income Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Common Stock, Capital Shares Reserved for Future Issuance Common Stock, Capital Shares Reserved for Future Issuance Public offering price per share Sale of Stock, Price Per Share Public offering of common stock Stock Issued During Period, Shares, New Issues Proceeds from Issuance of Common Stock Proceeds from Issuance of Common Stock Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge Accumulated Other Comprehensive Income (Loss), Net of Tax Derivatives By Maturity [Axis] Derivatives By Maturity [Axis] Derivatives By Maturity [Axis] Derivatives by Maturity [Domain] Derivatives by Maturity [Domain] Derivatives by Maturity [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] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative by Nature [Domain] Derivative by Nature [Domain] Derivative by Nature [Domain] 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] Derivative Instrument Risk [Axis] Receiver Interest Rate Swaps [Member] Options At Cost Options At Cost Options At Cost Derivative, Notional Amount Derivative, Notional Amount Derivative, Higher Remaining Maturity Range Derivative, Higher Remaining Maturity Range Derivative, Average Fixed Interest Rate Derivative, Average Fixed Interest Rate Interest Rate Derivatives, at Fair Value, Net Interest Rate Derivatives, at Fair Value, Net 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 Cash Flow Hedges Derivative Instruments Not Designated As Hedging Instruments Average Months To Expiration Notional Amount Interest Rate Derivative Not Designated As Hedging Instruments Receive Rate Interest Rate Derivative Not Designated As Hedging Instruments Receive Rate Interest Rate Derivative Not Designated As Hedging Instruments Receive Rate Derivative, Average Remaining Maturity Long [Member] Long [Member] Short [Member] Short [Member] TBA securities Fifteen Year and Thirty Year Securities [Member] TBA securities Fifteen Year and Thirty Year Securities [Member] TBA securities [Member] Derivative Liability, Fair Value, Gross Liability Derivative Liability, Fair Value, Gross Liability Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value, Gross Asset Notional Amount Derivative, Forward Settlement Value Derivative, Forward Settlement Value Derivative, Forward Settlement Value Secured Debt, Dollar Rolls Secured Debt, Dollar Rolls Fair Value of Derivative Instruments Derivative, Fair Value, Net Hedge De-Designations [Member] Hedge De-Designations [Member] Hedge De-Designations [Member] Notional Terminations/Expirations During the Period [Member] [Member] Notional Terminations/Expirations During the Period [Member] [Member] Notional Terminations/Expirations During the Period [Member] [Member] Notional Additions During the Period [Member] Notional Additions During the Period [Member] Notional Additions During the Period [Member] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Notional Amount Additions Notional Amount Of Cash Flow Hedge Instruments Additions During The Period Notional Amount Of Cash Flow Hedge Instruments Additions During The Period Settlement /Expirations Notional Amount Of Cash Flow Hedge Instruments Settlements Expirations During The Period Notional Amount Of Cash Flow Hedge Instruments Settlements Expirations During The Period Derivatives by Maturity [Domain] Unrealized (loss) gain on derivative instruments, net Average Fixed Pay Rate 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 Remaining interest rate swap term, maximum Federal Income Tax Note [Table] Federal Income Tax Note [Table] Investments, Owned, Federal Income Tax Note [Line Items] Investments, Owned, Federal Income Tax Note [Line Items] Undistributed Taxable Income Undistributed Taxable Income Undistributed Taxable Income 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 Dividends, Common Stock, Cash Dividends, Common Stock, Cash Income Statement [Abstract] Statement, Scenario [Axis] 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 Gain (Loss) on Sales of Mortgage Backed Securities (MBS) (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 Management Fee Expense General and administrative expenses General and Administrative Expense Total expenses Operating Expenses Income before income tax Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax benefit, net Excise and REIT Income tax Excise and REIT Income tax Dividend on preferred stock Preferred Stock Dividends, Income Statement Impact Net income Net Income (Loss) Attributable to Parent Net (loss) income (attributable) available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain (loss) on available-for-sale securities, net Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Dividend on preferred stock Comprehensive income available 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 Weighted Average Number of Shares Outstanding, Basic and Diluted Net income per common share - basic and diluted Earnings Per Share, Basic and Diluted Comprehensive income per share - basic and diluted Comprehensive income per share - basic and diluted Comprehensive income per share - basic and diluted Dividends declared per common share Common Stock, Dividends, Per Share, Declared Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Trading Securities and Other Trading Assets, Major Types of Trading Securities and Assets [Axis] Major Types of Trading Securities and Assets [Domain] 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] Weighted Average Life of Interest Only Securities Weighted Average Life of Interest Only Securities Weighted Average Life of Interest Only Securities 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 Available For Sale Securities Weighted Average Life 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. Available For Sale Securities Weighted Average Life 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. Available For Sale Securities Weighted Average Life yield Available For Sale Securities Weighted Average Life yield Available For Sale Securities Weighted Average Life yield Weighted Average Life Of Principal Only Securities Weighted Average Life Of Principal Only Securities Weighted average life of principal only securities. Consolidated Balance Sheet (Parenthetical) [Abstract] Consolidated Balance Sheet (Parenthetical) [Abstract] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] 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 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, Outstanding Common Stock, Shares, Outstanding 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 Accounting, Policy [Policy Text Block] Basis of Presentation and Significant Accounting Policies [Text Block] Use of Estimates, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Comprehensive Income, Policy [Policy Text Block] Comprehensive Income, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] 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 Policy [Policy Text Block] Repurchase and Resale Agreements Policy [Policy Text Block] Reverse Repurchase Agreements Policy [Policy Text Block] Reverse Repurchase Agreements Policy [Policy Text Block] Reverse Repurchase Agreements Policy [Policy Text Block] Management and Investment Advisory Fees, Policy [Policy Text Block] Management and Investment Advisory Fees, Policy [Policy Text Block] Derivative and other Hedging Instruments Derivatives, Policy [Policy Text Block] Consolidation, Variable Interest Entity, Policy [Policy Text Block] Consolidation, Variable Interest Entity, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Amount of Gain or (Loss) Recognized in Earnings (Ineffective Portion and Amount Excluded from Effectiveness Testing) Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) 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 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 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 Increase in other assets Increase (Decrease) in Other Operating Assets Increase 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 Proceeds from Sale of Available-for-sale Securities Proceeds from reverse repurchase agreements Proceeds from (Payments for) Securities Purchased under Agreements to Resell Net (payments) receipts on other derivative instruments not designated as qualifying hedges 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 Decrease in restricted cash Increase (Decrease) in Restricted Cash Other investing cash flows, net Payments for (Proceeds from) Other Investing Activities Net cash 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 Payments made on repurchase agreements Repayments of Short-term Debt Proceeds from other debt Proceeds from Other Debt Repayments on other debt Repayments of Other Debt Proceeds from Issuance of Preferred Stock and Preference Stock Proceeds from Issuance of Preferred Stock and Preference Stock Net proceeds from common stock issuances Payments made on common stock repurchases Payments for Repurchase of Common Stock Cash dividends paid Payments of Dividends Net cash 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 Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Other derivative instruments [Member] Other Derivatives [Member] Other Derivatives [Member] Not Designated as Hedging Instrument [Member] Future [Member] Future [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 two years less than or equal to three years [Member] greater than three years less than or equal to four years [Member] greater than three years less than or equal to four years [Member] greater than three years less than or equal to four 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] TBA and Forward Settling Agency Securities [Member] TBA and Forward Settling Agency Securities [Member] TBA and Forward Settling Agency Securities [Member] Interest Rate Swaption [Member] Interest Rate Swaption [Member] Gain On Interest Only Securities Remeasured at Fair Value Through Earnings Gain On Interest Only Securities Remeasured at Fair Value Through Earnings Gain on interest only securities remeasured at fair value through earnings Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 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 Notional Amount Of Derivatives Not Designated As Hedging Instruments Settlement Expiration During The Period Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Derivative assets not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Derivative liabilities not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value 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 Notional Amount Of Derivatives Not Designated As Hedging Instruments Additions During The Period Credit Derivative, Maximum Exposure, Undiscounted Credit Derivative, Maximum Exposure, Undiscounted Investment 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. Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] TBA and Forward Settling Agency Securities [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Measurement Frequency [Axis] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Total Return Swap [Member] Gain (loss) on REIT Equity Securities Gain (loss) on REIT Equity Securities Gain (loss) on REIT Equity Securities Receivable Under Reverse Repurchase Agreements Proceeds from sales of treasury securities Gain on interest only securities remeasured at fair value through earnings Derivative and Other Hedging Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Offsetting Assets and Liabilities [Abstract] Offsetting Assets and Liabilities [Abstract] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Offsetting of Financial Assets and Liabilities [Axis] Offsetting of Financial Assets and Liabilities [Axis] Offsetting of Financial Assets and Liabilities [Axis] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] 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] Schedules Of Securities Pledged As Collateral Under Repurchase Agreement [Text Block] [Table Text Block] 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] Schedule of Securities and Cash Pledged as Collateral from Counterparties [Table Text Block] Offsetting Assets and Liabilities [Table Text Block] Offsetting Assets [Table Text Block] Offsetting Liabilities [Table Text Block] Offsetting Liabilities [Table Text Block] 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 MBS 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] Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Government National Mortgage Association Certificates and Obligations (GNMA) [Member] Government National Mortgage Association Certificates and Obligations (GNMA) [Member] Weighted Average Life of Interest Only Securities 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 Amortized cost 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, at fair value Interest Rate Derivative Assets, at Fair Value Total agency MBS, at fair value Total Agency Securities Represents total investment in agency securities 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 Unamortized principal balance of principal-only strips Unamortized Principal Balance Of Principal Only Strips Unamortized principal balance of principal 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 Average prepayment rate based on forward rate assumption Future Prepayment Rate Assumption Of Investment Portfolio Average future constant repayment rate assumption of Investment Portfolio. Weighted Average Life Of Principal Only Securities 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] Related Party Transaction [Line Items] Related Party Transaction [Line Items] 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 Disclosure of Repurchase Agreements [Abstract] 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] Schedule of Borrowings under Repurchase Agreements and Weighted Average Interest Rates [Table Text Block] 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] Derivative liabilities, at fair value [Member] Derivative liabilities, at fair value [Member] Derivative Liabilities At Fair Value [Member] Derivative assets, at fair value [Member] Derivative assets, at fair value [Member] Derivative Assets At Fair Value [Member] Total Return Swap [Member] Swaption [Member] Swaption [Member] Treasury Futures [Member] Treasury Futures [Member] Treasury Futures [Member] Gain on Derivative Instruments and Trading Securities Gain on Derivative Instruments and Trading Securities Gain on Derivative Instruments and Trading Securities Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Net Estimated Fair Value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Notional Amount Of Derivatives Not Designated As Hedging Instruments additions due to Hedge De-Designations Derivative, Average Variable Interest Rate Fixed-Rate [Member] Fixed Income Securities [Member] Adjustable-Rate [Member] Adjustable Rate Loans [Member] CMO [Member] Collateralized Mortgage Obligations [Member] 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. Gross unrealized gains Agency Securities Gross Unrealized Gain This item represents the gross unrealized gains for agency securities, at a point in time. Gross unrealized losses Agency Securities Gross Unrealized Loss Agency Securities Gross Unrealized Loss Available-for-sale Securities, Fair Value Disclosure Available-for-sale Securities, Amortized Cost Basis Amortized cost Fair Value Total Agency Securities Management Agreement [Abstract] Management Agreement [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Disclosure [Text Block] Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information [Text Block] Quarterly Financial Information [Text Block] Agency Securities [Table Text Block] Agency Securities [Table Text Block] Agency Securities [Table Text Block] Components of Investment Securities [Table Text Block] Components of Investment Securities [Table Text Block] Components of Investment 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 [Table Text Block] 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 [Table Text Block] 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 [Table Text Block] Summary of Net Gain from Sale of Agency Securities [Table Text Block] Summary of Net Gain from Sale of Agency Securities [Table Text Block] Schedule of Assets Sold under Agreements to Repurchase [Table] Schedule of Assets Sold under Agreements to Repurchase [Table] Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] 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] Other Long-term Debt Spread Over LIBOR Spread Over LIBOR Spread Over LIBOR Debt Instrument, Face Amount Debt Instrument, Face Amount Borrowings Outstanding 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 Treasury Futures Short [Member] Treasury Futures Short [Member] Treasury Futures Short [Member] Derivative liabilities, at fair value [Member] Derivative Financial Instruments, Liabilities [Member] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value by Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Swaption [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] Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value Variable Interest Entity, Consolidated, Carrying Amount, Assets Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value Derivative Assets Assets, Fair Value Disclosure Assets, Fair Value Disclosure Obligation to return securities borrowed under reverse repurchase agreements, at fair value Marketable Securities, Equity Securities Derivative Liabilities Liabilities, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Transfers between hierarchy levels Transfers Between Hierarchy Levels Transfers between hierarchy levels Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Beginning OCI Balance Reversal of prior Period Unrealized (Gains) and Losses, Net on Realization Ending OCI Balance Repurchase Agreements And Other Debt Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Cost Fair Value Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Line Items] Class of Stock [Line Items] Schedule of Stock by Class [Table Text Block] Schedule of Stock by Class [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Income Tax Examination [Table] Income Tax Examination [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Preferred Class B [Member] Preferred Class B [Member] Series B Preferred Stock [Member] Series B Preferred Stock [Member] Preferred Class A [Member] Preferred Class A [Member] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Issuance of common stock, value Public offering of common stock Shares available for issuance Preferred Stock Authorized, but not Issued Preferred Stock Authorized, but not Issued Preferred Stock Authorized, but not Issued Sale of Stock, Price Per Share Accumulated Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Preferred Stock, Dividend Rate, Percentage Preferred Stock, Dividend Rate, Percentage Preferred Stock, Capital Shares Reserved for Future Issuance Preferred Stock, Capital Shares Reserved for Future Issuance Preferred Stock, Liquidation Preference Per Share Preferred Stock, Liquidation Preference Per Share Interest Only And Principal Only Strip [Member] Other Derivatives [Member] Options Held [Member] Options Held [Member] Gain Loss on Other Debt Gain Loss on Other Debt Gain Loss on Other Debt Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Weighted Average Life of Other Debt Weighted Average Life Other Debt Weighted Average Life Other Debt other debt net of discounts other debt net of discounts other debt net of discounts Debt Instrument, Description of Variable Rate Basis, LIBOR Debt Instrument, Description of Variable Rate Basis 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] 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 Statement of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Preferred Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings (Accumulated Deficit) [Member] Retained Earnings [Member] Balance, value Balance, Preferred Stock, shares Balance, Common Stock, shares Net income Preferred Units, Issued Preferred Units, Issued Dividends, Preferred Stock, Cash Dividends, Preferred Stock, Cash Issuance of common stock, shares Common dividends declared Balance, value Balance, Preferred Stock, shares Balance, Common Stock, shares Pledged Assets [Text Block] Pledged Assets [Text Block] Pledged Assets [Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Trading Securities, Realized Gain (Loss) Trading Securities, Realized Gain (Loss) Debt Instrument, Unamortized Discount (Premium), Net Debt Instrument, Unamortized Discount (Premium), Net Future Prepayment 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 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 Gain (Loss) on Sales of Mortgage Backed Securities (MBS) Gross gains on sale of agency MBS Marketable Securities, Realized Gain (Loss) Gross losses on sale of agency MBS Available-for-sale Securities, Gross Realized Losses Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events [Text Block] Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Variable Interest Entity, Primary Beneficiary [Member] Balance Sheet Location [Axis] Liability [Member] Liability [Member] Assets [Member] Assets [Member] Derivative by Nature [Domain] Offsetting Assets and Liabilities [Line Items] Offsetting Assets and Liabilities [Line Items] [Line Items] for Offsetting Assets and Liabilities [Table] Risk Of Repurchase Agreement To Stockholders Equity Risk Of Repurchase Agreement To Stockholders Equity Risk Of Repurchase Agreement To Stockholders Equity Net Amount of Assets (Liabilities) Presented on the Balance Sheet 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. Gross Amounts of Financial Instruments Not Offset on the Balance Sheet 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. Gross Amounts of Cash Collateral Not Offset on the Balance Sheet Gross Amounts of Cash Collateral Not Offset on the Balance Sheet Gross amount of an obligation to return collateral or right to receive collateral pledged under a master netting arrangement elected not to be offset against the fair value of financial asset or liability or other contract. Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative Asset, Fair Value, Amount Offset Against Collateral 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 Net amount after deducting gross amounts not offset on the balance sheet from net amount of assets (liabilities) presented on the balance sheet. Available For Sale Securities Pledged As Collateral Accrued Interest