Entity Central Index Key Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And EntityInformation Line Items Document And Entity Information [Abstract] Document And EntityInformation Document And Entity Information [Table] Document And Entity Information [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Document And Entity Information [Line Items] Document And Entity Information [Line Items] 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 Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well Known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Public Float Entity Public Float Unsettled purchased mortgage-backed securities, at fair value Receivable For Securities Sold Statement Of Financial Position [Abstract] Statement Of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Mortgage-backed securities, at fair value (including pledged assets of $16,929,846 and $22,591,973 at December 31, 2013 and December 31, 2012, respectively) Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Restricted cash Restricted Cash And Cash Equivalents Unsettled purchased mortgage-backed securities, at fair value Unsettled Purchased Mortgage Backed Securities At Fair Value Receivable for securities sold Receivable For Securities Sold Accrued interest receivable Interest Receivable Principal payments receivable Notes And Loans Receivable Net Current Debt security, held to maturity, at cost Held To Maturity Securities Interest rate swap asset Interest Rate Fair Value Hedge Asset At Fair Value Other assets Other Assets Total assets Assets Liabilities and shareholders’ equity Liabilities And Stockholders Equity [Abstract] Repurchase agreements Securities Sold Under Agreements To Repurchase Dollar roll liability Secured Debt Dollar Rolls Payable for unsettled securities Payables To Broker Dealers And Clearing Organizations Accrued interest payable Interest Payable Current And Noncurrent Interest rate swap liability Interest Rate Fair Value Hedge Liability At Fair Value Futures contract liability Foreign Currency Fair Value Hedge Liability At Fair Value Dividend payable Dividends Payable Current And Noncurrent Accounts payable and other liabilities Accounts Payable And Accrued Liabilities Current And Noncurrent Total liabilities Liabilities Shareholders’ equity: Stockholders Equity [Abstract] 7.625% Series A Cumulative Redeemable Preferred stock, $.001 par value, 25,000,000 shares authorized, 11,500,000 shares issued and outstanding at December 31, 2013 and December 31, 2012, respectively ($287,500 aggregate liquidation preference) Preferred Stock Value Common stock, $.001 par value, 200,000,000 shares authorized, 96,601,523 and 98,822,654 shares issued and outstanding at December 31, 2013 and December 31, 2012, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Retained earnings (accumulated deficit) Retained Earnings Accumulated Deficit Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income Loss Net Of Tax Total shareholders’ equity Stockholders Equity Total liabilities and shareholders’ equity Liabilities And Stockholders Equity Mortgage-backed securities, pledged assets Available For Sale Securities Pledged As Collateral 7.625% Series A Cumulative Redeemable Preferred stock, par value Preferred Stock Par Or Stated Value Per Share 7.625% Series A Cumulative Redeemable Preferred stock, shares authorized Preferred Stock Shares Authorized 7.625% Series A Cumulative Redeemable Preferred stock, shares issued Preferred Stock Shares Issued 7.625% Series A Cumulative Redeemable Preferred stock, shares outstanding Preferred Stock Shares Outstanding 7.625% Series A Cumulative Redeemable Preferred stock, aggregate Liquidation Preference Preferred Stock Liquidation Preference Value Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Income Statement [Abstract] Interest income: Revenues [Abstract] Interest income on mortgage-backed securities Interest Income Securities Mortgage Backed Interest income on short-term cash investments Investment Income Interest Total interest income Interest And Dividend Income Securities Interest expense Interest Expense Net interest margin Interest Income Expense Net Operating expenses: Operating Expenses [Abstract] Management fee Related Party Transaction Expenses From Transactions With Related Party Share based compensation Share Based Compensation General and administrative General And Administrative Expense Total operating expenses Operating Expenses Other income (loss): Noninterest Income Other [Abstract] Net realized gain (loss) on sale of mortgage-backed securities Gain Loss On Sales Of Mortgage Backed Securities M B S Impairment of mortgage-backed securities Impairment Of Investments Loss on derivative instruments, net Gain Loss On Derivative Instruments Net Pretax Total other income (loss) Other Operating Income Expense Net Net income (loss) Net Income Loss Dividends on preferred stock Preferred Stock Dividends Income Statement Impact Net income (loss) available to common shareholders Net Income Loss Available To Common Stockholders Basic Earnings (loss) per share - common stock, basic Earnings Per Share Basic Earnings (loss) per share - common stock, diluted Earnings Per Share Diluted Weighted average common shares outstanding, basic Weighted Average Number Of Shares Outstanding Basic Weighted average common shares outstanding, diluted Weighted Average Number Of Diluted Shares Outstanding Statement Of Income And Comprehensive Income [Abstract] Statement Of Income And Comprehensive Income [Abstract] Net income (loss) Other comprehensive income (loss): Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Net unrealized gains (losses) on securities available for sale Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Net unrealized gains (losses) on interest rate hedges Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax Other comprehensive income (loss) Other Comprehensive Income Loss Net Of Tax Comprehensive income (loss) Comprehensive Income Net Of Tax Statement Of Stockholders Equity [Abstract] Statement Of Stockholders Equity [Abstract] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Preferred Stock Preferred Stock [Member] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] 7.625% Series A Cumulative Redeemable Preferred Stock Redeemable Preferred Stock [Member] Common Stock Amount Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income [Member] Balance Repurchase of common stock Stock Redeemed Or Called During Period Value Issuance of stock Stock Issued During Period Value New Issues Share based compensation expense Stock Issued During Period Value Share Based Compensation Dividends declared on common stock Dividends Common Stock Cash Dividends declared on preferred stock Dividends Preferred Stock Cash Net income (loss) Other comprehensive income (loss) Balance Proceeds on dollar roll liability. Repayments on dollar roll liability. Cash Flow Noncash Investing Activities Disclosure [Abstract] Obligation To Brokers Incurred For Purchase Of Mortgage Backed Securities Cash Flow Noncash Financing Activities Disclosure [Abstract] Statement Of Cash Flows [Abstract] Statement Of Cash Flows [Abstract] Operating activities Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Net amortization of premium related to mortgage-backed securities Accretion Amortization Of Discounts And Premiums Investments Reclassification of deferred swap loss Amortization Of Deferred Hedge Gains Amortization related to interest rate swap agreements Other Amortization Of Deferred Charges Share based compensation expense Hedge ineffectiveness Gain Loss On Fair Value Hedge Ineffectiveness Net Net (gain) loss on sale of mortgage-backed securities Impairment loss on mortgage-backed securities Net loss on derivative instruments Unrealized Gain Loss On Derivatives Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] (Increase) decrease in accrued interest receivable Increase Decrease In Accrued Interest Receivable Net Increase in other assets Increase Decrease In Other Operating Assets Increase in accrued interest payable Increase Decrease In Interest Payable Net Increase in accounts payable and other liabilities Increase Decrease In Other Accounts Payable And Accrued Liabilities 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 mortgage-backed securities Payments To Acquire Mortgage Backed Securities M B S Categorized As Available For Sale Principal repayments of mortgage-backed securities Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Sale of mortgage-backed securities Proceeds From Sale Of Mortgage Backed Securities M B S Categorized As Available For Sale Net payments on derivative instruments Payments For Derivative Instrument Investing Activities Net cash provided by (used in) investing activities Net Cash Provided By Used In Investing Activities Financing activities Net Cash Provided By Used In Financing Activities [Abstract] Issuance of preferred stock Proceeds From Issuance Of Preferred Stock And Preference Stock (Repurchase) issuance of common stock Proceeds From Payments For Other Financing Activities Cash dividends paid Payments Of Dividends Proceeds from repurchase agreements Proceeds From Other Short Term Debt Principal repayments on repurchase agreements Repayments Of Other Short Term Debt Proceeds from dollar roll liability Proceeds On Dollar Roll Liability Repayments on dollar roll liability Repayments On Dollar Roll Liability Increase (decrease) in restricted cash margin on derivatives Proceeds From Repayments Of Restricted Cash Financing Activities Payment on termination interest rate swap Payments For Hedge Financing Activities Net cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Net increase (decrease) in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid during the period for interest Interest Paid Supplemental schedule of non-cash investing activities Cash Flow Noncash Investing Activities Disclosure [Abstract] Obligation to brokers for purchase of unsettled mortgage-backed securities Obligation To Brokers Incurred For Purchase Of Mortgage Backed Securities Receivable for securities sold Other Significant Noncash Transaction Value Of Consideration Received1 Supplemental schedule of non-cash financing activities Cash Flow Noncash Financing Activities Disclosure [Abstract] Dividends declared, not yet paid Text Block [Abstract] Organization and Business Description Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Financial Instruments Fair Value Disclosures [Text Block] Mortgage-Backed Securities Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block] Debt Security, Held to Maturity Debt Disclosure [Text Block] Repurchase Agreements Repurchase Agreements Resale Agreements Securities Borrowed And Securities Loaned Disclosure [Text Block] Derivatives and Other Hedging Instruments Derivative Instruments And Hedging Activities Disclosure [Text Block] Capital Stock Stockholders Equity Note Disclosure [Text Block] Earnings per Share Earnings Per Share [Text Block] Equity Incentive Plans Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Transactions with Related Parties Related Party Transactions Disclosure [Text Block] Accumulated Other Comprehensive Income Comprehensive Income Note [Text Block] Summarized Quarterly Financial Results Quarterly Financial Information [Text Block] Basis of Presentation and Use of Estimates Basis Of Presentation And Significant Accounting Policies [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Cash and Cash Equivalents Cash And Cash Equivalents Policy [Text Block] Restricted Cash Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy Financial Instruments Fair Value Transfer Policy Policy [Text Block] Mortgage Backed Securities Policy [Text Block] Mortgage-Backed Securities Mortgage Backed Securities Policy [Text Block] Derivative Instruments Derivatives Policy [Text Block] Repurchase Agreements Repurchase Agreements Collateral Policy Dollar roll liability. Dollar Roll Liability Dollar Roll Liability Policy Offsetting Assets And Liabilities Policy [Text Block] Offsetting of Assets and Liabilities Offsetting Assets And Liabilities Policy [Text Block] Disclosure of accounting policy for recognition of interest revenue. Disclosure may include the method of recognizing interest income on loan and trade receivables, the method of amortizing premiums or accreting discounts, and a statement about the policy for the treatment of related fees and costs, including the method of amortizing net deferred fees and costs. Interest Income Revenue Recognition Interest Policy [Text Block] Income Taxes Income Tax Policy [Text Block] Share-Based Compensation Compensation Related Costs Policy [Text Block] Earnings Per Common Share (EPS) Earnings Per Share Policy [Text Block] Other Comprehensive Income Comprehensive Income Policy Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Carrying Values and Fair Values of All Financial Instruments Fair Value By Balance Sheet Grouping [Text Block] Schedule of Mortgage Backed Securities Portfolio backed by US Government agency or US Government Sponsored Entity [Text Block] Schedule of Agency Securities Portfolio Backed by U.S. Government Agency or U.S. Government Sponsored Entity Schedule Of Mortgage Backed Securities Portfolio Backed By Us Government Agency Or Us Government Sponsored Entity [Text Block] Components of Carrying Value of Available for Sale Mortgage Backed Securities [Text Block] Components of Carrying Value of Available-For-Sale Agency Securities Components Of Carrying Value Of Available For Sale Mortgage Backed Securities [Text Block] Schedule of Interest Income Investment Income [Text Block] Schedule Of Gain Loss On Investments By Transaction Type Table [Text Block] Gross Gains and Losses from Securities Sales Schedule Of Gain Loss On Investments By Transaction Type Table [Text Block] Schedule of Mortgage Backed Securities in a Loss Position [Text Block] Schedule of Agency Securities In Unrealized Loss Position Schedule Of Mortgage Backed Securities In Loss Position [Text Block] Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together by Type Securitized Assets And Any Other Financial Assets Managed Together By Type Of Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Adjustable Rate Residential Mortgage Adjustable Rate Residential Mortgage [Member] Information About Company's Adjustable Rate Agency Securities That will Reprice or Amortize Based on Contractual terms Investments Classified By Contractual Maturity Date Table [Text Block] Fixed Rate Residential Mortgage Fixed Rate Residential Mortgage [Member] Contractual Reprising Information Regarding Repurchase Agreements Schedule Of Repurchase Agreements Schedule of Location of Derivatives on Balance Sheet Schedule of Location of Derivatives Instruments on Consolidated Balance Sheet Schedule Of Location Of Fair Value Derivatives On Balance Sheet [Text Block] Volume of Activity for the Company's Interest Rate Derivative Instruments Schedule Of Derivative Instruments Included In Trading Activities [Text Block] Hedging Exposure Future Cash Flows for Forecasted Transactions [Text Block] Hedging Exposure Future Cash Flows with Interest Rate Swaps for Forecasted Transactions Hedging Exposure Future Cash Flows For Forecasted Transactions [Text Block] Schedule of Fair Value of Futures Contracts Schedule Of Derivative Liabilities At Fair Value Table [Text Block] Schedule of Volume of Activity Futures Contracts Schedule Of Derivative Instruments [Text Block] Schedule of ARM Securities Forward Purchase Commitments Schedule of ARM Securities Forward Purchase Commitments Schedule Of A R M Mbs Forward Purchase Commitments Table [Text Block]