Equity [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] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] 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 Common Stock, Shares, Issued Common Stock, Shares, Issued 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 Disclosure of Repurchase Agreements [Abstract] 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] US Treasury Securities [Member] US Treasury Securities [Member] Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Agency Securities [Member] Agency Securities [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Repurchase Agreements [Member] Repurchase Agreements [Member] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] 30 Days or Less [Member] Maturity Less than 30 Days [Member] 1 to 3 Months thirty one to ninety [Member] thirty one to ninety [Member] 3 to 6 Months 4 to 6 Months [Member] 4 to 6 Months [Member] 6 to 9 Months 7 to 9 months [Member] 7 to 9 months [Member] 9 to 12 Months 10 to 12 Months [Member] 10 to 12 Months [Member] 12 to 24 Months 13 to 24 Months [Member] 13 to 24 Months [Member] 24 to 36 Months 25 to 36 months [Member] 25 to 36 months [Member] 36 to 48 months 37 to 48 months [Member] 37 to 48 months [Member] 48 to 60 Months 49 to 60 Months [Member] 49 to 60 Months [Member] Maturity Overnight [Member] Maturity Overnight [Member] 2 Days to 1 Month [Member] 2 Days to 1 Month [Member] U.S. Treasury Repurchase Agreements from 2 Days to 1 Month [Member] Statement [Line Items] Statement [Line Items] Repurchase Agreements Securities Sold under Agreements to Repurchase 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 Pledged Assets [Abstract] Pledged Assets [Abstract] Risk Of Repurchase Agreement To Stockholders Equity Risk Of Repurchase Agreement To Stockholders Equity Risk Of Repurchase Agreement To Stockholders Equity Risk of interest swap and swaption agreements to stockholders' equity Credit Derivative, Maximum Exposure, Undiscounted Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Maturity Less than 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 Greater than 90 Days [Member] Offsetting Assets and Liabilities [Line Items] Offsetting Assets and Liabilities [Line Items] [Line Items] for Offsetting Assets and Liabilities [Table] Retained Interests in Consolidated VIE's Pledged as Collateral Under Repo Retained Interests in Consolidated VIE's Pledged as Collateral Under Repurchase Agreements Retained Interests in Consolidated VIE's Pledged as Collateral Under Repurchase Agreements 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. Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Other Derivatives [Member] Other Derivatives [Member] Other Derivatives [Member] Position [Axis] Position [Axis] Position [Domain] Position [Domain] Short [Member] Short [Member] Long [Member] Long [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Future [Member] Future [Member] Forward Contracts [Member] Forward Contracts [Member] Put Option [Member] Put Option [Member] Derivative Position [Axis] Derivative Position [Axis] Derivative Position [Axis] Derivative Position [Domain] Derivative Position [Domain] Derivative Position [Domain] Interest Rate Swap [Member] Interest Rate Swap [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] Adjustments for Change in Accounting Principle [Axis] 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] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swaption [Member] Interest Rate Swaption [Member] TBA and Forward Settling Agency Securities [Member] TBA and Forward Settling Agency Securities [Member] TBA and Forward Settling Agency Securities [Member] Interest Rate Swaps [Member] Interest Rate Swaps [Member] Interest Rate Swaps [Member] Gain Loss on Other Debt Gain Loss on Other Debt Gain Loss on Other Debt Unrealized gain on derivative instruments, net Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Net periodic interest 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 Net Unrealized Gain (Loss) on Swaps Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge Average Maturity (Years) Derivative, Average Remaining Maturity Deferred loss expected to be reclassified from OCI into interest expense over the 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 Unrealized Gain (Loss) on Securities Unrealized Gain (Loss) on Securities 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 Derivative Liability, Notional Amount Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Gain (loss) on REIT Equity Securities Gain (loss) on REIT Equity Securities Gain (loss) on REIT Equity Securities 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 Notional Amount Of Derivatives Not Designated As Hedging Instruments Additions During The Period 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 Of Derivatives Not Designated As Hedging Instruments Settlement Expiration During The Period Derivative, Average Fixed Interest Rate Derivative, Average Fixed Interest Rate Interest Rate Derivatives, at Fair Value, Net Interest Rate Derivatives, at Fair Value, Net Options At Cost Options At Cost Options At Cost 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 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 Trading Securities Trading Securities Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table] Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table] Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] J.P. Morgan Securities, LLC [Member] J.P. Morgan Securities, LLC [Member] J.P. Morgan Securities, LLC [Member] Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Line Items] Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Line Items] [Line Items] for Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table] Securities Sold under Agreements to Repurchase Counterparty Exposure Counterparty Exposure, Net Represents the net carrying value of the securities pledged under repurchase agreements, including accrued interest plus any cash or assets on deposit to secure the repurchase obligation, less the amount of the repurchase liability, including accrued interest. Repurchase Agreements And Other Debt Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [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 Fair Value Disclosures [Abstract] 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] Investments, Debt and Equity Securities [Abstract] Investment Securities Investment In Mortgage-Backed Securities [Text Block] Tabular disclosure of investment in mortgage-backed securities which consist of both securities for which the principal and interest payments are guaranteed by government-sponsored entities ("GSEs") and AAA rated non-agency Securities for which the principal and interest payments are not guaranteed by a GSE. Mortgage backed 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 Statement of Cash Flows [Abstract] Interest paid Interest Paid Taxes paid Income Taxes Paid Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Net Income (Loss) Attributable to Parent 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 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 Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, De-Designated Interest Rate Swaps (Gain) loss on sale of agency securities, net Gain (Loss) on Sales of Mortgage Backed Securities (MBS) Loss on derivative instruments and other securities, net Loss On Derivative Instruments And Trading Securities Net Loss on derivative instruments and trading securities, net (Increase) decrease 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 Payments To Acquire Non- Agency Mortgage Backed Securities Payments To Acquire Non- Agency Mortgage Backed Securities Payments To Acquire Non- Agency Mortgage Backed Securities 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 Net proceeds from (payments on) 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 and cash equivalents Increase (Decrease) in Restricted Cash Other investing cash flows, net Payments for (Proceeds from) Other Investing Activities Net cash provided by 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 Federal Home Loan Bank Advances Proceeds from Federal Home Loan Bank Advances Repayments of Federal Home Loan Bank Borrowings Repayments of Federal Home Loan Bank Borrowings 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 Proceeds from Issuance of Preferred Stock and Preference Stock Net proceeds from common stock issuance Payments for common stock repurchases Payments for Repurchase of Common Stock Cash dividends paid Payments of Dividends Net cash used in 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 Carrying Value Cash and cash equivalents at end of period Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Discontinuation of Election to Account for Interest Rate Swaps as Designated Cash Flow Hedges [Member] Major Types of Debt and Equity Securities [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] Beginning OCI Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Net Unrealized Gain (Loss) on Swaps Total Accumulated OCI Balance Accumulated Other Comprehensive Income (Loss), Net of Tax OCI before reclassifications Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Amounts reclassified from accumulated OCI 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 Amounts reclassified from accumulated OCI Total Accumulated OCI Balance Total Reclass of Other Comprehensive Income Total Reclass of Other Comprehensive Income Statement [Table] Statement [Table] Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [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 Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Preferred Class A [Member] Preferred Class A [Member] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Preferred Class B [Member] Preferred Class B [Member] Series B Preferred Stock [Member] Series B Preferred Stock [Member] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized 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 Issuance of preferred stock Preferred Stock, Liquidation Preference Per Share Preferred Stock, Liquidation Preference Per Share Preferred Stock, Shares Issued Preferred Stock, Shares Issued Preferred Stock, Value, Issued Preferred Stock, Value, Issued Preferred stock, percent interest per share Preferred Stock, Percent Interest Per Share Preferred Stock, Percent Interest Per Share Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] 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 Derivative and Other Hedging Instruments Derivative Instruments and Hedging Activities 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] Reverse Repurchase Agreements [Member] Reverse Repurchase Agreements [Member] Reverse Repurchase Agreements [Member] Assets Pledged to Us [Member] Assets Pledged to Us [Member] Assets Pledged to Us [Member] Federal Home Loan Bank Stock Federal Home Loan Bank Stock 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 Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value Obligation to Return Securities Borrowed Under Reverse Repurchase Agreements at Fair Value Restricted Cash and Securities Pledged Restricted Cash and Securities Pledged Restricted Cash and Securities Pledged Restricted Cash and Cash Equivalents Restricted Cash and Cash Equivalents Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Federal Income Tax Note [Table] Federal Income Tax Note [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] 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 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, 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, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Accrued RSU Dividend Equivalents Accrued RSU Dividend Equivalents Accrued RSU Dividend Equivalents during 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, Grants 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 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Vest Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Vest Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Vest Date 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 Quarterly Financial Information Disclosure [Abstract] Schedule of Quarterly Financial Information Schedule of Quarterly Financial Information [Table Text Block] Statement of Financial Position [Abstract] Assets: Assets [Abstract] Agency securities, at fair value (including pledged securities of $48,380 and $51,629, respectively) Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value Agency securities transferred to consolidated variable interest entities, at fair value (pledged securities) Variable Interest Entity, Consolidated, Carrying Amount, Assets Non-agency securities, at fair value (including pledged securities of $113 and $0, respectively) Non-Agency Securities, at Fair Value Non-Agency Securities, at Fair Value U.S. Treasury securities, at fair value (including pledged securities of $25 and $2,375, respectively) Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value REIT equity securities, at fair value Marketable Securities, Equity Securities Cash and cash equivalents Restricted cash and cash equivalents Derivative assets, at fair value Derivative Asset Receivable for securities sold (including pledged securities of $0 and $79, 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] Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances Debt of consolidated variable interest entities, at fair value 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 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) Common stock - $0.01 par value; 600.0 shares authorized; 337.5 and 352.8 shares issued and outstanding, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Schedule of Trading Securities and Other Trading Assets [Table] Trading Securities [Table] Guarantor Obligations by Underlying Asset Class [Axis] Underlying Asset Class [Axis] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Available-for-sale Securities [Member] Available-for-sale Securities [Member] Agency MBS sold, at cost Cost Of Sale Of Available For Sale Secuities CostOfSaleOfAvailableForSaleSecuities Proceeds from agency MBS sold Net gain (loss) on sale of MBS Gross gain on sale of MBS Marketable Securities, Realized Gain (Loss) Gross loss on sale of MBS Available-for-sale Securities, Gross Realized Losses Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Derivative Instrument [Axis] US Treasury Securities [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] 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] Transfers between hierarchy levels Transfers Between Hierarchy Levels Transfers between hierarchy levels Agency securities Agency securities transferred to consolidated VIEs Non-Agency Securities, at Fair Value U.S. Treasury securities TBA securities Derivative Liability Total assets Assets, Fair Value Disclosure Interest rate swaps Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Common Stock [Member] Common Stock [Member] Issuance of common stock, value Stock Issued During Period, Value, New Issues Unaudited Interim Consolidated Financial Statements Quarterly Financial Information [Text Block] Accounting Policies [Abstract] 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 Significant Accounting Policies [Text Block] Basis of Presentation and Significant Accounting Policies [Text Block] Derivatives, Policy [Policy Text Block] Derivatives, Policy [Policy 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, Policy [Policy Text Block] Investment, Policy [Policy Text Block] Interest Income [Policy Text Block] 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] Federal Home Loan Bank Advances [Policy Text Block] Federal Home Loan Bank Advances [Policy Text Block] Disclosure of accounting policy for Federal Home Loan Bank advances. Reverse Repurchase Agreements Policy [Policy Text Block] Reverse Repurchase Agreements Policy [Policy Text Block] Reverse Repurchase Agreements Policy [Policy Text Block] Variable Interest Entity Disclosure [Text Block] Variable Interest Entity Disclosure [Text Block] Management and Investment Advisory Fees, Policy [Policy Text Block] Management and Investment Advisory Fees, Policy [Policy Text Block] Income Tax Disclosure [Text Block] Pledged Assets Pledged Assets [Text Block] Pledged Assets [Text Block] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Interest income Interest Income, Securities, Mortgage Backed Interest expense Interest Expense Net interest income Interest Income (Expense), Net Gain (loss) 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 (loss) income, net Noninterest Income Management fees Management Fee Expense General and administrative expenses General and Administrative Expense Total expenses Operating Expenses Income (loss) 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 income (loss) Dividend on preferred stock Preferred Stock Dividends, Income Statement Impact Net income (loss) available (attributable) to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Unrealized Gains and (Losses), Net Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive (loss) income (attributable) 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 (loss) per common share - basic and diluted 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 Dividends declared per common share Common Stock, Dividends, Per Share, Declared Noninterest Expense [Abstract] Noninterest Expense [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Investment Securities Interest Income Derivative Instruments Organization, Consolidation and Presentation of Financial Statements [Abstract] 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 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] US Government Futures Securities [Table Text Block] US Government Futures Securities [Table Text Block] US Government Futures 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] Asset Class [Domain] Measurement Frequency [Axis] Derivative Contract [Domain] Receiver Swaption [Member] Receiver Swaption [Member] Receiver Swaption [Member] Fair Value Hierarchy [Domain] Derivative Liability, Notional Amount Derivative asset, fair value Derivative liability, fair value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value U.S. Treasury Securities - short Financial Instruments Sold, Not yet Purchased, US Government and Agency Obligations Total - (short)/long, net government bonds owned and sold short net government bonds owned and sold short net Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Reversal of Unrealized (Gains) and Losses, Net on Realization Range [Axis] Range [Axis] Range [Domain] Range [Domain] REIT Ordinary Income Distribution % REIT Capital Gain Distribution % 2.5% Coupon [Member] 2.5% Coupon [Member] 2.5% Coupon [Member] 3.0% Coupon [Member] 3.0% Coupon [Member] 3.0% Coupon [Member] 3.5% Coupon [Member] 3.5% Coupon [Member] 3.5% Coupon [Member] 4.0% Coupon [Member] 4.0% Coupon [Member] 4.0% Coupon [Member] 4.5% Coupon [Member] 4.5% Coupon [Member] 4.5% Coupon [Member] 15 Year Maturity [Member] 15 Year Maturity [Member] 15 Year Maturity [Member] 30 Year Maturity [Member] 30 Year Maturity [Member] 30 Year Maturity [Member] Fannie Mae [Member] Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Freddie Mac [Member] Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Ginnie Mae [Member] Government National Mortgage Association Certificates and Obligations (GNMA) [Member] Derivative, Notional Amount Derivative, Notional Amount Cost Basis Derivative, Forward Settlement Value Derivative, Forward Settlement Value Net long TBA position, at fair value Derivative Asset, Fair Value, Gross Asset TBA, net carrying value Derivative, Fair Value, Net Other derivative instruments [Member] Payer Swaption [Member] Payer Swaption [Member] Payer Swaption [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] Changes in Derivative and Other Hedge Portfolio [Roll Forward] Changes in Derivative and Other Hedge Portfolio [Roll Forward] Changes in Derivative and Other Hedge Portfolio [Roll Forward] Notional Amount Additions Settlement, Expirations or Exercise Notional Amount Amount Gain/(Loss) Recognized in Income on Derivatives 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] 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] Cost Fair Value Average Months to Expiration Average Fixed Pay Rate Average Receive Rate (LIBOR) 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 Preferred Stock, Shares Outstanding Balance, Common Stock, shares Common Stock, Shares, Outstanding Other comprehensive income (loss): Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Stock Issued During Period, Value, New Issues Repurchase of common stock Stock Repurchased During Period, Value Payments for Repurchase of Common Stock 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 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] Schedule of Federal Home Loan Bank Advances and Weighted Average Interest Rates [Table Text Block] Schedule of Federal Home Loan Bank Advances and Weighted Average Interest Rates [Table Text Block] Schedule of Federal Home Loan Bank Advances and Weighted Average Interest Rates [Table Text Block] Quarterly Results Schedule of Investments [Table] Schedule of Investments [Table] Mortgage-backed Securities, Issued by Private Enterprises [Member] Mortgage-backed Securities, Issued by Private Enterprises [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] 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] MBS, par value Available For Sale Securities Par Available For Sale Securities Par Unamortized discount Debt Instrument, Unamortized Discount Unamortized premium Debt Instrument, Unamortized Premium Amortized cost Available-for-sale Securities, Amortized Cost Basis Gross unrealized gains Available-for-sale Securities, Gross Unrealized Gain Gross unrealized losses Available-for-sale Securities, Gross Unrealized Loss Total available-for-sale 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 MBS measured at fair value through earnings 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. Mortgage-backed Securities Available-for-sale, Fair Value Disclosure Mortgage-backed Securities Available-for-sale, Fair Value Disclosure Weighted average coupon Debt, Weighted Average Interest Rate Weighted average yield Weighted Average Yield Percentage WeightedAverageYieldPercentage 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 Future Prepayment Rate Assumption Of Investment Portfolio Average future constant repayment rate assumption of Investment Portfolio. Dividends Declared [Table Text Block] Dividends Declared [Table Text Block] Derivatives by Maturity [Domain] 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 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] Greater Than Ten Years [Member] Greater Than Ten Years [Member] Greater Than Ten Years [Member] Interest Rate Swaps Excluding Forward Starting [Member] Interest Rate Swaps Excluding Forward Starting [Member] Interest Rate Swaps Excluding Forward Starting [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 Derivative, Notional Amount Derivative, Higher Remaining Maturity Range Derivative, Higher Remaining Maturity Range Non-Agency Securities Pledged as Collateral Non-Agency Securities Pledged as Collateral The fair value of non-agency securities that serve as collateral for borrowings. 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 (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Outstanding Preferred Stock, Liquidation Preference, Value Preferred Stock, Liquidation Preference, Value Common Stock, Par or Stated Value Per Share (in dollars per share) Common Stock, Par or Stated Value Per Share Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Outstanding TBA securities Fifteen Year and Thirty Year Securities [Member] TBA securities Fifteen Year and Thirty Year Securities [Member] TBA securities [Member] Assets Sold under Agreements to Repurchase [Line Items] Assets Sold under Agreements to Repurchase [Line Items] Derivative, Forward Settlement Value Derivative, Fair Value, Net Description of variable rate basis Debt Instrument, Description of Variable Rate Basis Basis spread over LIBOR Spread Over LIBOR Spread Over LIBOR Principal amount Debt Instrument, Face Amount Weighted average life of other debt Weighted Average Life Other Debt Weighted Average Life Other Debt Income Statement [Abstract] Interest income: Interest Income (Expense), Net [Abstract] Interest income Interest expense Net interest income Other income, net: Noninterest Income [Abstract] Gain (loss) on derivative instruments and other securities, net Total other income, net Expenses: Management fees General and administrative expenses Total expenses Net income (loss) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Excise and REIT Income tax Dividend on preferred stock Net income (loss) available (attributable) to common stockholders Unrealized Gains and (Losses), Net Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, De-Designated Interest Rate Swaps Other comprehensive income (loss) Comprehensive income (loss) Comprehensive income (loss) available (attributable) to common stockholders Weighted average number of common shares outstanding-basic and diluted (shares) Net loss per common share - basic and diluted (dollars per share) Dividend Reinvestment And Direct Stock Purchase Plan [Member] Dividend Reinvestment And Direct Stock Purchase Plan [Member] Dividend Reinvestment And Direct Stock Purchase Plan [Member] Related Party Transactions [Abstract] 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 Subsequent Events [Abstract] Subsequent Event Subsequent Events [Text Block] Management Agreement and Related Party Transactions Related Party Transactions Disclosure [Text Block] Available-for-sale Securities [Table Text Block] Available-for-sale Securities [Table Text Block] Components of Investment Securities 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 Mortgage Backed Securities Estimated Weighted Average Life Classifications [Table Text Block] Summary of Mortgage Backed Securities Estimated Weighted Average Life Classifications [Table Text Block] Summary of Changes in Accumulated OCI for Agency Securities 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 Mortgage Backed Securities [Table Text Block] Summary of Net Gain from Sale of Mortgage Backed Securities [Table Text Block] Federal Home Loan Bank Advances by Maturity [Abstract] Federal Home Loan Bank Advances by Maturity [Abstract] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] 37 to 48 months [Member] Federal Home Loan Bank Advances, Maturity Period [Axis] Federal Home Loan Bank Advances, Maturity Period [Axis] Federal Home Loan Bank Advances, Maturity Period [Axis] Federal Home Loan Bank Advances, Maturity Period [Domain] Federal Home Loan Bank Advances, Maturity Period [Domain] [Domain] for Federal Home Loan Bank Advances, Maturity Period [Axis] 49 to 60 Months [Member] 10 to 12 Months [Member] thirty one to ninety [Member] 13 Months [Member] 13 Months [Member] 13 Months Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Short-term Debt [Line Items] Short-term Debt [Line Items] Short-term Debt, Percentage Bearing Fixed Interest Rate Short-term Debt, Percentage Bearing Fixed Interest Rate FHLB Weighted Average Days to Maturity FHLB Weighted Average Days to Maturity FHLB Weighted Average Days to Maturity Advances from Federal Home Loan Banks Advances from Federal Home Loan Banks 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] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 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] Non-Agency Securities Unrealized Gain Non-Agency Securities Unrealized Gain Non-Agency Securities Unrealized Gain Non-Agency Securities Unrealized Loss Non-Agency Securities Unrealized Loss Non-Agency Securities Unrealized Loss Mortgage Backed Securities Amortized Cost Mortgage Backed Securities Amortized Cost Mortgage Backed Securities Amortized Cost Mortgage Backed Securities Unrealized Gain Mortgage Backed Securities Unrealized Gain Mortgage Backed Securities Unrealized Gain Mortgage Backed Securities Unrealized Loss Mortgage Backed Securities Unrealized Loss Mortgage Backed Securities Unrealized Loss Gross unrealized gain Agency Securities Gross Unrealized Gain This item represents the gross unrealized gains for agency securities, at a point in time. Gross unrealized loss Agency Securities Gross Unrealized Loss Agency Securities Gross Unrealized Loss Fair value Available-for-sale Securities Interest-only and principal-only strips, amortized cost Trading Securities, Cost Interest-only and principal-only strips, fair value Trading Securities, Other Total agency MBS, 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. Total agency MBS, at fair value Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Repurchase of common stock shares Average repurchase price (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Repurchase of common stock, value Remaining amount authorized for repurchase Stock Repurchase Program, Remaining Authorized Repurchase Amount 10 Year Maturity [Member] 10 Year Maturity [Member] 10 Year Maturity [Member] 5 Year Maturity [Member] 5 Year Maturity [Member] 5 Year Maturity [Member] 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] 7 Years Maturity [Member] 7 Years Maturity [Member] 7 Years Maturity [Member] Derivative, Forward Settlement Value Derivative Asset, Fair Value, Gross Asset U.S. Treasury securities, net Major Types of Trading Securities and Assets [Domain] Greater Than Five Years [Member] Greater Than Five Years [Member] Greater Than Five Years [Member] 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 Agency securities classified as available for sale, Amortized cost 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 Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Assets [Member] Assets [Member] Liability [Member] Liability [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. Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table Text Block] Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table Text Block] [Table Text Block] for Repurchase Agreements with Counterparties Greater than or equal to 5% of Equity at Risk [Table] 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] Fair Value Measurements Fair Value Disclosures [Text Block] Under Prime Broker Agreements [Member] Under Prime Broker Agreements [Member] Under Prime Broker Agreements [Member] Excluding Cash Received [Member] Excluding Cash Received [Member] Excluding Cash Received [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] AAA Non-Agency Mortgage-Backed Securities [Member] AAA Non-Agency Mortgage-Backed Securities [Member] AAA rated Non-Agency Mortgage-Backed Securities [Member] Accrued interest on pledged securities Available For Sale Securities Pledged As Collateral Accrued Interest AvailableForSaleSecuritiesPledgedAsCollateralAccruedInterest Total Fair Value of Securities Pledged and Accrued Interest Total Fair Value of Securities Pledged and Accrued Interest Total Fair Value of 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 Total Fair Value Of Agency Securities Pledged And Accrued Interest 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] Net long TBA position, at fair value Unamortized premium balance Debt Instrument, Unamortized Discount (Premium), Net Weighted average expected constant prepayment rate Weighted average life of interest-only strips Weighted Average Life Interest Only Securities Weighted Average Life Interest Only Securities Weighted average life of principal-only strips Weighted Average Life Principal Only Securities Weighted Average Life Principal Only Securities Net unrealized gain Agency securities, total fair value Securities Held as Collateral, at Fair Value Debt, 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 Gain (loss) associated with consolidated debt Fair value of CMO securities and interest-only and principal-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, Principal 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