Offsetting [Abstract] Schedule of Offsetting Assets Offsetting Assets [Table Text Block] Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Debt Disclosure [Abstract] Schedule of Repurchase Agreement Counterparty [Table] Schedule of Repurchase Agreement Counterparty [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Domain] Federal Home Loan Bank Branch [Domain] Federal Home Loan Bank of Indianapolis Federal Home Loan Bank of Indianapolis [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Exchangeable Note Senior Exchangeable Note [Member] Senior Exchangeable Note [Member] Repurchase Agreement Counterparty Repurchase Agreement Counterparty [Line Items] Repurchase obligation maturity Repurchase Obligation Maturity Repurchase obligation, maturity. Collateral ratio Collateral Ratio Collateral ratio. Outstanding secured advances from FHLBI Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances Average outstanding borrowings from FHLBI Federal Home Loan Bank, Advances, Activity for Year, Average Balance of Agreements Outstanding FHLBI weighted average interest rate on advances Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year FHLBI weighted average maturity of advances Federal Home Loan Bank, Advances, Activity for Year, Weighted Average Maturity Federal Home Loan Bank, Advances, Activity for Year, Weighted Average Maturity Debt retirement amount Extinguishment of Debt, Amount Repurchase price Debt Instrument, Repurchase Amount Net loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization And Business Operations [Table] Organization And Business Operations [Table] Organization And Business Operations [Table] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Operating Partnership IAS Operating Partnership L.P. [Member] IAS Operating Partnership L.P. [Member] Organization And Business Operations Organization And Business Operations [Line Items] Organization And Business Operations [Line Items] Number of operating segments Number of Operating Segments Ownership percentage in operating partnership Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Minimum distribution percentage of taxable income to qualify for REIT Minimum Distribution Percentage Of Taxable Income To Qualify For Real Estate Investment Trust Minimum distribution percentage of taxable income to qualify for real estate investment trust. Noncontrolling Interest [Abstract] Schedule of Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] Schedule of Income (Expense) Allocated and Distributions Paid to Noncontrolling Interests Schedule of Income (Expense) Allocated and Distributions Paid to Noncontrolling Interests [Table Text Block] Schedule of Income (Expense) Allocated and Distributions Paid to Noncontrolling Interests [Table Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Purchase of Operating Partnership units from non-controlling interest Payment For Purchase Of Operating Partnership Units From Noncontrolling Interest Payment For Purchase Of Operating Partnership Units From Noncontrolling Interest Equity [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Equity method investments, including portion attributable to noncontrolling interest Accumulated Equity Method Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Accumulated Equity Method Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Available-for-sale securities, including portion attributable to noncontrolling interest AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest [Member] Derivatives and hedging, including portion attributable to noncontrolling interest Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Equity method investment attributable to parent Accumulated Equity Method Investment Gain (Loss) Attributable to Parent [Member] Accumulated Equity Method Investment Gain (Loss) Attributable to Parent [Member] Available-for-sale securities attributable to parent AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Derivatives and hedging attributable to parent Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] AOCI attributable to parent AOCI Attributable to Parent [Member] Accumulated other comprehensive income (loss) from derivative instruments: Accumulated Other Comprehensive Income (Loss) [Line Items] Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Deferred Swap (Gain) Loss From Dedesignation, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Deferred Swap (Gain) Loss From Dedesignation, Net of Tax Currency translation adjustments on investment in unconsolidated venture Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total other comprehensive income/(loss), net Other Comprehensive Income (Loss), Net of Tax AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Other comprehensive income/(loss) attributable to non-controlling interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Rebalancing of ownership percentage of non-controlling interest Noncontrolling Interest, Rebalancing of Ownership Interest Noncontrolling Interest, Rebalancing of Ownership Interest Purchase of OP units from non-controlling interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Ending balance Earnings Per Share [Abstract] Schedule of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Schedule of Interest Rate Swaps Outstanding Schedule of Interest Rate Derivatives [Table Text Block] Schedule of Credit Derivatives Disclosure of Credit Derivatives [Table Text Block] Schedule of Fair Value of Derivative Financial Instruments and Classification on Balance Sheet Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Effect of Derivative Financial Instruments on Statement of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Fair Value Disclosures [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Measurement Input, Expected Term Measurement Input, Expected Term [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Weighted Average Weighted Average [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] GSE CRT Embedded Derivatives Embedded Derivative, Fair Value of Embedded Derivative Asset GSE CRT Embedded Derivatives, weighted average life Embedded Derivative Asset, Measurement Input Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Additional Paid in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income (loss) Retained earnings (Distributions in excess of earnings) Retained Earnings [Member] Total Stockholders’ Equity Parent [Member] Non- Controlling Interest Noncontrolling Interest [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A Preferred Stock Series A Preferred Stock [Member] Series B Preferred Stock Series B Preferred Stock [Member] Series C Preferred Stock Series C Preferred Stock [Member] Statement [Line Item] Statement [Line Items] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Issued Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive income (loss) Proceeds from issuance of common stock, net of offering costs (in shares) Stock Issued During Period, Shares, New Issues Proceeds from issuance of common stock, net of offering costs Stock Issued During Period, Value, New Issues Repurchase of shares of common stock (in shares) Stock Repurchased During Period, Shares Repurchase of shares of common stock Stock Repurchased During Period, Value Proceeds from issuance of preferred stock, net of offering costs (in shares) Preferred Stock Issued During Period Shares New Issues Preferred Stock Issued During Period Shares New Issues Proceeds from issuance of preferred stock, net of offering costs Preferred Stock Issued During Period Value New Issues Preferred Stock Issued During Period Value New Issues Stocks awards (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Common stock dividends Dividends, Common Stock, Cash Common unit dividends Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Preferred stock dividends Dividends, Preferred Stock, Cash Amortization of equity-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Purchase of OP units from non-controlling interest Rebalancing of ownership percentage of non-controlling interest Ending balance (in shares) 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] Management Management [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Incurred costs, prepaid or expensed Incurred Costs, Prepaid or Expensed [Member] Incurred Costs, Prepaid or Expensed [Member] Incurred costs, charged against equity as a cost of raising capital Incurred Costs, Charged Against Equity as a Cost of Raising Capital [Member] Incurred Costs, Charged Against Equity as a Cost of Raising Capital [Member] Related Party Transaction Related Party Transaction [Line Items] Amounts of transaction with related party Related Party Transaction, Amounts of Transaction Noncontrolling Interest [Table] Noncontrolling Interest [Table] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Net income (loss) attributable to Invesco Mortgage Capital Inc. Net Income (Loss) Attributable to Parent Net transfers from non-controlling interest Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Net Change from net income (loss) attributable to Invesco Mortgage Capital Inc. common stockholders and transfers (to) from non-controlling interest Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Change Due to Net Income Attributable to Parent and Effects of Changes, Net Investments, Debt and Equity Securities [Abstract] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Mortgage-backed and credit risk transfer securities Mortgage-backed and GSE Credit Risk Transfer (CRT) Securities [Member] Mortgage-backed and GSE Credit Risk Transfer (CRT) Securities [Member] Interest-Only Securities Interest-Only Securities [Member] Interest-Only Securities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Principal/notional balance Marketable Securities, Principal Amount Marketable Securities, Principal Amount Unamortized premium Marketable Securities, Unamortized Premium Marketable Securities, Unamortized Premium Unamortized discount Marketable Securities, Unamortized Discount Marketable Securities, Unamortized Discount Gross unrealized gains Marketable Securities, Accumulated Gross Unrealized Gain, Before Tax Marketable Securities, Accumulated Gross Unrealized Gain, Before Tax Gross unrealized losses Marketable Securities, Accumulated Gross Unrealized Loss, Before Tax Marketable Securities, Accumulated Gross Unrealized Loss, Before Tax Fair Value Marketable Securities Schedule of Fair Values Measured on Recurring Basis Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of Net Derivative Asset (Liability) Level 3 Roll Forward Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Loan Participation Interest Level 3 Roll Forward Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Net Derivative Asset (Liability), Fair Value Inputs Fair Value Inputs, Net Derivative Asset (Liability), Quantitative Information [Table Text Block] Fair Value Inputs, Net Derivative Asset (Liability), Quantitative Information [Table Text Block] Schedule of Carrying Values and Estimated Fair Value of Financial Instruments Carrying Values And Estimated Fair Values Of Long Term Obligations And Other Financial Instruments [Table Text Block] Carrying Values And Estimated Fair Values Of Long Term Obligations And Other Financial Instruments Table [Text Block] 15 year fixed-rate Fifteen Year Fixed-Rate Residential Mortgage [Member] Fifteen Year Fixed-Rate Residential Mortgage 30 year fixed-rate Thirty Year Fixed Rate Residential Mortgage [Member] Thirty Year Fixed Rate Residential Mortgage Hybrid ARM Hybrid Adjustable Rate Residential Mortgage [Member] Hybrid adjustable rate residential mortgage. Agency RMBS Residential Mortgage Backed Securities [Member] Agency-CMO Agency Interest Only and Collateralized Mortgage Obligations [Member] Agency Interest Only and Collateralized Mortgage Obligations [Member] Agency IO Agency Interest Only [Member] Agency Interest Only [Member] CMO Collateralized Mortgage Obligations [Member] Agency CMBS Agency Commercial Mortgage Backed Securities [Member] Agency Commercial Mortgage Backed Securities [Member] Non-Agency CMBS Non-Agency Commercial Mortgage Backed Securities [Member] Non-Agency Commercial Mortgage Backed Securities [Member] Non-Agency RMBS Non Agency Residential Mortgage Backed Securities [Member] Non agency residential mortgage backed securities. Non-Agency IO Non-Agency Interest Only Securities [Member] Non-Agency Interest Only Securities [Member] GSE CRT GSE Credit Risk Transfer (CRT) [Member] GSE Credit Risk Transfer (CRT) Fair Value Debt Securities, Available-For-Sale, Fair Value [Abstract] Debt Securities, Available-For-Sale, Fair Value [Abstract] Less than 12 Months Marketable Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Marketable Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 12 Months or More Marketable Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Marketable Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total Marketable Securities, Continuous Unrealized Loss Position, Fair Value Marketable Securities, Continuous Unrealized Loss Position, Fair Value Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Less than 12 Months Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Marketable Securities, Continuous Unrealized Loss Position, Accumulated Loss Marketable Securities, Continuous Unrealized Loss Position, Accumulated Loss Number of Securities Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract] Less than 12 Months (in securities) Marketable Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year Marketable Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year 12 Months or More (in securities) Marketable Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Marketable Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Total (in securities) Marketable Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Marketable Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Fair value option, fair value Fair Value, Option, Continuous Unrealized Loss Position, Fair Value Fair Value, Option, Continuous Unrealized Loss Position, Fair Value Fair value option, unrealized losses Fair Value, Option, Continuous Unrealized Loss Position, Accumulated Loss Fair Value, Option, Continuous Unrealized Loss Position, Accumulated Loss Related Party Transactions Related Party Transactions Disclosure [Text Block] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Derivatives Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract] Gross Amounts of Recognized Assets Derivative Asset, Fair Value, Gross Asset Gross Amounts Offset in the Consolidated Balance Sheets Derivative Asset, Fair Value, Gross Liability Net Amounts of Assets presented in the Consolidated Balance Sheets Derivative Asset Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments Derivative, Collateral, Obligation to Return Securities Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Received Derivative, Collateral, Obligation to Return Cash Net amount Derivative Asset, Fair Value, Amount Offset Against Collateral Organization and Business Operations Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Schedule of other assets Investment Holdings, Schedule of Investments [Table Text Block] Agency RMBS, Agency CMBS and CMO Agency RMBS, Agency CMBS And CMO [Member] Agency RMBS, Agency CMBS And CMO [Member] Agency IO, Non-Agency RMBS and Non-Agency CMBS Agency Interest Only, Non Agency Residential Mortgage Backed Securities, and Non Agency Commercial Mortgage Backed Securities [Member] Agency Interest Only, Non Agency Residential Mortgage Backed Securities, and Non Agency Commercial Mortgage Backed Securities [Member] Percentage of MBS and GSE CRT accounted for under the fair value option Fair Value, Option, Percentage of Mortgage Backed Securities and GSE Credit Risk Transfer Securities Fair Value, Option, Percentage of Mortgage Backed Securities and GSE Credit Risk Transfer Securities Gross unrealized losses Statement of Financial Position [Abstract] Series A Cumulative Redeemable Preferred Stock Series B Cumulative Redeemable Preferred Stock Series C Cumulative Redeemable Preferred Stock MBS and GSE CRT pledged as collateral Marketable Securities Pledged As Collateral Marketable Securities Pledged As Collateral Preferred Stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred Stock, shares authorized Preferred Stock, Shares Authorized Preferred Stock, dividend rate stated percentage Preferred Stock Dividend Stated Percentage Rate Preferred Stock Dividend Stated Percentage Rate Preferred Stock, shares issued Preferred Stock, Shares Issued Preferred Stock, shares outstanding Preferred Stock, Shares Outstanding Preferred Stock, aggregate liquidation preference Preferred Stock, Liquidation Preference, Value Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Quarterly Financial Information Disclosure [Abstract] Summarized Quarterly Results of Operations (Unaudited) Quarterly Financial Information [Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Number of shares issued during period (in shares) Sale of Stock, Number of Shares Issued in Transaction Sale of stock, price (in USD per share) Sale of Stock, Price Per Share Proceeds from issuance of common stock Sale of Stock, Consideration Received on Transaction Secured loans Repayments of Secured Debt Preferred stock, dividends (in USD per share) Preferred Stock, Dividends Per Share, Declared Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Dividends Payable [Axis] Dividends Payable [Axis] Dividends Payable [Axis] Dividends Payable [Domain] Dividends Payable [Domain] Dividends Payable [Domain] Ordinary Dividends Ordinary Dividends [Member] Ordinary Dividends [Member] Return of Capital Return Of Capital [Member] Return Of Capital [Member] Capital Gain Distribution Capital Gain Distributions [Member] Capital Gain Distributions [Member] Carry Forward Carry Forward [Member] Carry Forward Class of Stock [Line Items] Class of Stock [Line Items] Preferred stock dividend declared (in USD per share) Dividends, preferred stock Dividends, Preferred Stock Common stock dividend declared (in USD per share) Common Stock, Dividends, Per Share, Declared Dividends, common stock Dividends, Common Stock Subsequent Events Subsequent Events [Text Block] Income Statement [Abstract] Interest Income Interest and Dividend Income, Operating [Abstract] Mortgage-backed and credit risk transfer securities Interest and Dividend Income, Securities, Operating Commercial and other loans Interest and Fee Income, Loans and Leases Total interest income Interest and Dividend Income, Operating Interest Expense Interest Expense [Abstract] Repurchase agreements Repurchase Agreements, Interest Expense Amount Secured loans Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Exchangeable senior notes Interest Expense, Debt Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Other income (loss) Component of Operating Income [Abstract] Gain (loss) on investments, net Gain (Loss) on Investments Equity in earnings (losses) of unconsolidated ventures Income (Loss) from Equity Method Investments Gain (loss) on derivative instruments, net Derivative, Gain (Loss) on Derivative, Net Realized and unrealized credit derivative income (loss), net Realized and Unrealized Credit Derivative Income (Loss), Net The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of the credit derivative, held at each balance sheet date, that was included in earnings for the period. Net loss on extinguishment of debt Other investment income (loss), net Other Investment Income Loss Net Other Investment Income Loss Net Total other income (loss) Noninterest Income (Expense), Net Noninterest Income (Expense), Net Expenses Operating Expenses [Abstract] Management fee — related party Related Party Transaction, Expenses from Transactions with Related Party General and administrative General and Administrative Expense Total expenses Operating Expenses Net income (loss) Net income (loss) attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) attributable to Invesco Mortgage Capital Inc. Dividends to preferred stockholders Preferred Stock Dividends, Income Statement Impact Net income (loss) attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Earnings (loss) per share: Net income (loss) attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Basic (in usd per share) Earnings Per Share, Basic Diluted (in usd per share) Earnings Per Share, Diluted Weighted average number of shares of common stock: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial Commercial Portfolio Segment [Member] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Secured Loan Collateralized by Mortgage Servicing Rights Secured Loan Collateralized By Mortgage Servicing Rights [Member] Secured Loan Collateralized By Mortgage Servicing Rights [Member] Participation Interest in a Secured Loan Collateralized by Mortgage Servicing Rights Participation Interest In Secured Loan Collateralized By Mortgage Servicing Rights [Member] Participation Interest In Secured Loan Collateralized By Mortgage Servicing Rights [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Loans and Leases Receivable Disclosure [Line Items] Loans and Leases Receivable Disclosure [Line Items] Loans receivable, renewal option, term Loans Receivable, Renewal Option, Term Loans Receivable, Renewal Option, Term Loans receivable, basis spread on variable rate Loans Receivable, Basis Spread on Variable Rate Number of loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Weighted average years to maturity Loans and Leases Receivable, Weighted Average Years to Maturity Loans and Leases Receivable, Weighted Average Years to Maturity Weighted average coupon rate Loans and Leases Receivable, Weighted Average Coupon Rate Loans and Leases Receivable, Weighted Average Coupon Rate Non-controlling Interest - Operating Partnership Noncontrolling Interest Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash Flows from 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, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Amortization of mortgage-backed and credit risk transfer securities premiums and (discounts), net Accretion (Amortization) of Discounts and Premiums, Investments Realized and unrealized (gain) loss on derivative instruments, net Realized And Unrealized Gain (Loss) On Derivative Instruments, Net Realized And Unrealized Gain (Loss) On Derivative Instruments, Net Realized and unrealized (gain) loss on credit derivatives, net Realized And Unrealized Gain (Loss) On Credit Derivatives, Net Realized And Unrealized Gain (Loss) On Credit Derivatives, Net (Gain) loss on investments, net (Gain) loss from investments in unconsolidated ventures in excess of distributions received Income (Loss) From Investments In Unconsolidated Ventures In Excess Of Distributions Received Income (Loss) From Investments In Unconsolidated Ventures In Excess Of Distributions Received Other amortization Other Amortization Other Amortization Net loss on extinguishment of debt (Gain) loss on foreign currency transactions, net Foreign Currency Transaction Gain (Loss), before Tax Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase in operating assets Increase (Decrease) in Operating Assets Increase in operating liabilities Increase (Decrease) in Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows from Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of mortgage-backed and credit risk transfer securities Payments to Acquire Marketable Securities Distributions from (contributions to) investments in unconsolidated ventures, net Contributions Distributions In Equity Method Investee Contributions/distributions from an investment of an equity method investee. Change in other assets Payments for (Proceeds from) Other Investing Activities Principal payments from mortgage-backed and credit risk transfer securities Proceeds from Maturities, Prepayments and Calls of Marketable Securities Proceeds from Maturities, Prepayments and Calls of Marketable Securities Proceeds from sale of mortgage-backed and credit risk transfer securities Proceeds from Sale and Maturity of Marketable Securities Settlement (termination) of futures, forwards, swaps, and TBAs, net (Payments For) Proceeds From Termination of Futures, Forwards, Swaps, Swaptions, And TBAs (Payments For) Proceeds From Termination of Futures, Forwards, Swaps, Swaptions, And TBAs Net change in due from counterparties and collateral held payable on derivative instruments Net Change In Due From Counterparties And Collateral Held Payable, Investing Activities Net Change In Due From Counterparties And Collateral Held Payable, Investing Activities Principal payments from commercial loans held-for-investment Proceeds from Principal Repayments on Commercial Loans Proceeds from Principal Repayments on Commercial Loans Origination and advances of commercial loans, net of origination fees Payments for Origination of Loans, Net of Origination Fees Payments for Origination of Loans, Net of Origination Fees Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Repurchase of common stock Payments for Repurchase of Common Stock Proceeds from issuance of preferred stock Proceeds from Issuance of Redeemable Preferred Stock, Net of Issuance Costs Proceeds from Issuance of Redeemable Preferred Stock, Net of Issuance Costs Proceeds from repurchase agreements Proceeds from Other Short-term Debt Principal repayments of repurchase agreements Repayments of Other Short-term Debt Extinguishment of exchangeable senior notes Repayments of Senior Debt Net change in due from counterparties and collateral held payable on repurchase agreements Net Change In Due From Counterparties And Collateral Held Payable On Repurchase Agreements, Financing Activities Net Change In Due From Counterparties And Collateral Held Payable On Repurchase Agreements, Financing Activities Payments of deferred costs Payments of Financing Costs Purchase of Operating Partnership units from non-controlling interest Payments to Noncontrolling Interests Payments of dividends and distributions Payments of Ordinary Dividends Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents, and restricted cash beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents, and restricted cash end of period Supplement Disclosure of Cash Flow Information Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Non-cash Investing and Financing Activities Information Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Net change in unrealized gain (loss) on mortgage-backed and credit risk transfer securities Net Change In Unrealized Gain On Available For Sale Securities And Derivatives This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities and derivatives that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period. Dividends and distributions declared not paid Dividends Payable (Decrease) increase in unsettled to-be-announced (“TBA”) securities and related payable Increase (decrease) In Unsettled TBA Securities Related Payable Increase (decrease) In Unsettled TBA Securities And Related Payable Net change in investment related receivable (payable) excluding TBA securities Net Change in Investment Related Payable (Receivable) Net Change in Investment Related Payable (Receivable) Net change in repurchase agreements, not settled Repurchase Agreements Not Settled The fair value of repurchase agreements entered into but not settled as of period end. Change in foreign currency translation adjustment on other investments Change In Foreign Currently Translation Adjustment On Other Investments Change In Foreign Currently Translation Adjustment On Other Investments Borrowings Debt Disclosure [Text Block] Basis of Presentation and Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Translation of Foreign Currencies Foreign Currency Transactions and Translations Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Mortgage-Backed and Credit Risk Transfer Securities Marketable Securities, Policy [Policy Text Block] Commercial Loans Held-For-Investment Financing Receivable, Held-for-investment [Policy Text Block] Interest Income Recognition Revenue Recognition, Interest [Policy Text Block] Cash and Cash Equivalents, Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Due from Counterparties/Collateral Held Payable Due From Counterparties, Collateral Held Payable [Policy Text Block] Due From Counterparties, Collateral Held Payable [Policy Text Block] Investment Related Receivable / Investment Related Payable Investment Related Receivable and Payable [Policy Text Block] Investment Related Receivable and Payable [Policy Text Block] Investments in Unconsolidated Ventures Equity Method Investments [Policy Text Block] Repurchase Agreements Repurchase and Resale Agreements Policy [Policy Text Block] Secured Loans Debt, Policy [Policy Text Block] Dividends Payable Stockholders' Equity, Policy [Policy Text Block] Earnings (Loss) per Share Earnings Per Share, Policy [Policy Text Block] Share-Based Compensation Share-based Payment Arrangement [Policy Text Block] Underwriting Commissions and Offering Costs Underwriting Commissions And Costs [Policy Text Block] Underwriting commissions and costs, policy. Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Accounting for Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Accounting Pronouncements Recently Adopted and Pending Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Credit Derivatives [Table] Schedule of Credit Derivatives [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Embedded Credit Derivative Embedded Derivative Financial Instruments [Member] Credit Derivatives Credit Derivatives [Line Items] Fair value amount Embedded Derivative, Fair Value of Embedded Derivative, Net Notional amount Derivative, Notional Amount Maximum potential amount of future undiscounted payments Credit Derivative, Maximum Exposure, Undiscounted Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Equity Distribution Agreement Equity Distribution Agreement [Member] Equity Distribution Agreement [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2009 Equity Incentive Plan Incentive Plan [Member] Incentive plan. LIBOR Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Title of Individual [Domain] Non-Executive Director Director [Member] Employees of the Manager and its Affiliates Employees Of The Manager And Its Affiliates [Member] Employees Of The Manager And Its Affiliates Preferred stock, percentage rate Percentage Of Preferred Stock Terms Percentage Of Preferred Stock Terms Preferred stock, liquidation preference Preferred Stock, Liquidation Preference Per Share Preferred stock, price per share per annum Preferred Stock, Dividend Rate, Per-Dollar-Amount Preferred stock dividend rate Preferred Stock, Dividend Rate, Percentage Preferred stock redemption price (in usd per share) Preferred Stock, Redemption Price Per Share Preferred stock dividends basis spread on variable rate Preferred Stock Dividends Basis Spread on Variable Rate Preferred Stock Dividends Basis Spread on Variable Rate Equity distribution agreement, number of shares to sell Equity Distribution Agreement, Number Of Stock Available To Sell Equity Distribution Agreement, Number Of Stock Available To Sell Number of shares issued during period (in shares) Sale of stock, price (in USD per share) Proceeds from issuance of common stock Payments of stock issuance costs Payments of Stock Issuance Costs Purchase of OP units from non-controlling interest Repurchase of shares of common stock (in shares) Repurchase of shares of common stock Average price per repurchased common share Share Repurchased, Average Price Per Share Share Repurchased, Average Price Per Share Number of shares authorized to be repurchased (in shares) Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Common stock options reserved for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Compensation expense recognized Share-based Payment Arrangement, Expense Restricted stock awards during period (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Total unrecognized compensation cost expected to be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Total unrecognized compensation cost expected to be recognized, period for recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Total unrecognized compensation cost expected to be recognized, weighted average remaining vesting period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Weighted Average Remaining Vesting Period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Weighted Average Remaining Vesting Period FHLBI stock Federal Home Loan Bank Stock Loan participation interest Loan Participation Interest Loan Participation Interest Commercial loans, held-for-investment Loans and Leases Receivable, Net Amount Investments in unconsolidated ventures Equity Method Investments Prepaid expenses and other assets Prepaid Expense and Other Assets Total Other Assets Schedule of Nonvested Restricted Stock Shares Activity Nonvested Restricted Stock Shares Activity [Table Text Block] Schedule of Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Dividends Declared Dividends Declared [Table Text Block] Other Assets Investment Holdings, Schedule of Investments [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Unrealized gains/(losses), net Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) Ending balance Unrealized losses on credit derivatives, net Unrealized Gain (Loss) on Credit Derivative, Net Unrealized Gain (Loss) on Credit Derivative, Net Offsetting Liabilities [Table] Offsetting Liabilities [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Central Clearing Counterparty Central Clearing Counterparty [Member] Central Clearing Counterparty [Member] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Derivative assets, at fair value Derivative liabilities, at fair value Derivative Liability Earnings per Common Share Earnings Per Share [Text Block] Schedule of Borrowings Schedule Of Secured Borrowings [Table Text Block] Schedule of Secured Borrowings Schedule of Maturities of Outstanding Borrowings Schedule of Maturities of Long-term Debt [Table Text Block] Variable Interest Entity Disclosure [Abstract] Variable Interest Entity Disclosure [Abstract] Schedule of Maximum Risk of Loss Schedule of Variable Interest Entities [Table Text Block] 2020 Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months 2021 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two 2022 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three 2023 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four 2024 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five Total Long-term Debt Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash Cash [Member] Centrally Cleared Interest Rate Swaps Centrally Cleared Interest Rate Swaps [Member] Centrally Cleared Interest Rate Swaps [Member] Interest Rate Swaps Interest Rate Swap [Member] Repurchase Agreements Repurchase Agreements [Member] Offsetting Derivative Liabilities [Abstract] Offsetting Derivative Liabilities [Abstract] Derivatives: Derivatives [Abstract] Derivatives [Abstract] Gross amounts of recognized liabilities, derivatives Derivative Liability, Fair Value, Gross Liability Gross amounts offset in the consolidated balance sheet, derivatives Derivative Liability, Fair Value, Gross Asset Net amounts of liabilities presented in the consolidated balance sheet, derivatives Derivative Liability, Excluding Portion Related to Centrally Cleared Interest Rate Swaps Derivative Liability, Excluding Portion Related to Centrally Cleared Interest Rate Swaps Financial instruments, derivatives Derivative Liability, Not Offset, Policy Election Deduction Collateral received, derivatives Derivative, Collateral, Right to Reclaim Cash Net amount, derivatives Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Repurchase Agreements: Repurchase Agreements [Abstract] Repurchase Agreements [Abstract] Gross amounts of recognized liabilities, repurchase agreements Securities Sold under Agreements to Repurchase, Gross Gross amounts offset in the consolidated balance sheet, repurchase agreements Securities Sold under Agreements to Repurchase, Asset Net amounts of assets presented in the consolidated balance sheet, repurchase agreements Securities Sold under Agreements to Repurchase Financial instruments, repurchase agreements Securities Sold under Agreements to Repurchase, Not Offset, Policy Election Deduction Collateral received, repurchase agreements Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash Net amount, repurchase agreements Securities Sold under Agreements to Repurchase, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Secured Loans: Secured Loans [Abstract] Secured Loans [Abstract] Gross amounts of recognized liabilities, secured loans Securities Loaned, Gross Gross amounts offset in the consolidated balance sheet, secured loans Securities Loaned, Asset Net amounts of assets presented in the consolidated balance sheet, secured loans Securities Loaned Financial instruments, secured loans Securities Loaned, Not Offset, Policy Election Deduction Collateral received, secured loans Securities Loaned, Collateral, Right to Reclaim Cash Net amount, secured loans Securities Loaned, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Total gross amount of recognized liabilities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Total gross amounts offset in the consolidated balance sheets Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset Net amounts of assets presented in the consolidated balance sheets Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Total financial instruments Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Offset, Policy Election Deduction Total collateral received Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash Total net amount Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Fair value of securities pledged against derivatives Financial Instruments, Owned and Pledged as Collateral, at Fair Value Cash collateral received Derivative Asset, Fair Value Of Collateral, Cash Derivative Asset, Fair Value Of Collateral, Cash Cash collateral pledged on derivatives Cash Collateral Pledged On Derivatives Cash Collateral Pledged On Derivatives Securities sold under agreements to repurchase fair value of collateral Securities Sold under Agreements to Repurchase, Fair Value of Collateral Collateral pledged against secured loans Securities Loaned, Fair Value of Collateral Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Variable Interest Entities (VIEs) Variable Interest Entity Disclosure [Text Block] Derivative [Table] Derivative [Table] Interest Rate Swaps Future Contracts Future [Member] Currency Forward Contracts Foreign Exchange Forward [Member] Credit Derivatives Credit Derivatives [Member] Credit Derivatives [Member] Derivative [Line Items] Derivative [Line Items] Changes in notional amount of derivative instruments [Roll Forward] Derivative [Roll Forward] Derivative [Roll Forward] Notional Amount as of December 31, 2018 Additions Notional Amount Of Derivatives Additions Notional Amount Of Derivatives, Additions Settlement, Termination, Expiration or Exercise Settlement, Termination, Expiration or Exercise Of Interest Rate Swap Agreement Settlement, Termination, Expiration or Exercise Of Interest Rate Swap Agreement Notional Amount as of December 31, 2019 Cover page. Entities [Table] Entities [Table] 7.75% Series A Cumulative Redeemable Preferred Stock Series A Cumulative Redeemable Preferred Stock [Member] Series A Cumulative Redeemable Preferred Stock [Member] 7.75% Fixed-to-Floating Series B Cumulative Redeemable Preferred Stock Series B Cumulative Redeemable Preferred Stock [Member] Series B Cumulative Redeemable Preferred Stock [Member] 7.50% Fixed-to-Floating Series C Cumulative Redeemable Preferred Stock Series C Cumulative Redeemable Preferred Stock [Member] Series C Cumulative Redeemable Preferred Stock [Member] Entity Information [Line Items] Entity Information [Line Items] Document Type Document Type Document Annual Report Document Annual Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name 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 Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Loan Participation Interest Loan Participation [Member] Loan Participation [Member] Secured Loans Secured Debt [Member] Secured Debt Type [Axis] Secured Debt Type [Axis] Secured Debt Type [Axis] Secured Debt Type [Domain] Secured Debt Type [Domain] [Domain] for Secured Debt Type [Axis] Secured Debt, Excluding Asset-backed Securities Secured Debt, Excluding Asset-backed Securities [Member] Secured Debt, Excluding Asset-backed Securities [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Repurchase Agreements Disclosure of Repurchase Agreements [Abstract] Amount Outstanding Secured Debt, Repurchase Agreements Period-end Weighted Average Interest Rate Securities Sold Under Agreements To Repurchase Weighted Average Interest Rate Securities sold under agreements to repurchase, weighted average interest rate. Weighted Average Remaining Maturity (Days) Securities Sold Under Agreements To Repurchase Weighted Average Remaining Maturity Securities Sold under Agreements to Repurchase Weighted Average Remaining Maturity. Secured Loans, Amount Outstanding Advances from Federal Home Loan Banks Secured Loans, Weighted Average Interest Rate Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate at Period End Secured Loans, Weighted Average Remaining Maturity (Days) Federal Home Loan Bank Advances Weighted Average Remaining Maturity Federal Home Loan Bank Advances Weighted Average Remaining Maturity Total Borrowings Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract] Total borrowings, amount outstanding Secured Debt Total borrowings, weighted average interest rate Secured Debt Weighted Average Interest Rate Secured Debt Weighted Average Interest Rate Total borrowings, weighted average remaining maturity (days) Secured Debt Weighted Average Remaining Maturity Secured Debt Weighted Average Remaining Maturity Non-Controlling Interest Net income (loss) allocated Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable Distributions paid Distribution Made to Limited Partner, Cash Distributions Paid Schedule of Investment Portfolio Marketable Securities [Table Text Block] Schedule of Fair Value of Available-for-sale Securities and Securities Accounted for under Fair Value Option by Asset Type Schedule Of Fair Value Of Available-For-Sale Securities And Securities Accounted For Under Fair Value Option By Asset Type [Table Text Block] Schedule Of Fair Value Of Available-For-Sale Securities And Securities Accounted For Under Fair Value Option By Asset Type [Table Text Block] Schedule of Fair Value of MBS and GSE CRTs According to Weighted Average Life Classification Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of Unrealized Losses and Estimated Fair Value of MBS and GSE CRTs by Length of Time Marketable Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Marketable Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Schedule of Changes in Other than Temporary Impairment Included in Earnings Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] Schedule of Gain (Loss) on Investments Gain (Loss) on Securities [Table Text Block] Schedule of Components of MBS and GSE CRT Interest Income Interest Income and Interest Expense Disclosure [Table Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Value Reported Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] 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] Mortgage loans, held-for-investment Commercial Loans, Held For Investment Commercial Loans, Held For Investment Total Financial Assets Fair Value Disclosure Financial Assets, Fair Value Disclosure Repurchase agreements Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Secured loans Federal Home Loan Bank Borrowings, Fair Value Disclosure Total Financial Liabilities Fair Value Disclosure Selected Results of Operations for Quarters Quarterly Financial Information [Table Text Block] Schedule of Fair Value of Collateral Hold and Pledged Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Shares granted during the year (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Shares vested during the year (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Unvested at the end of the period (in shares) 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 [Abstract] Unvested at the beginning of the period (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Shares granted during the year (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Shares vested during the year (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Unvested at the beginning of the period (in USD per share) RMBS interest-only securities Residential Mortgage Backed Securities-Interest Only [Member] Residential Mortgage Backed Securities-Interest Only Non-Agency RMBS Other-than-temporary credit impairment losses Other than Temporary Impairment Losses, Investments Commitments and Contingencies Disclosure [Abstract] Contingencies and Contingencies Commitments and Contingencies Disclosure [Text Block] ASSETS Assets [Abstract] Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $21,132,742 and $17,082,825, respectively) Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash Due from counterparties Margin Deposit Assets Investment related receivable Interest Receivable Other assets Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Repurchase agreements Secured loans Dividends payable Investment related payable Investment-related Liabilities Accrued interest payable Interest Payable Collateral held payable Other Secured Financings Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Due to affiliate Due to Affiliate Total liabilities Liabilities Commitments and contingencies (See Note 15) Commitments and Contingencies Stockholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred Stock, par value $0.01 per share; 50,000,000 shares authorized: Preferred Stock, Value, Issued Common Stock, par value $0.01 per share; 450,000,000 shares authorized; 144,256,357 and 111,584,996 shares issued and outstanding, respectively Common Stock, Value, Issued Additional paid in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings (distributions in excess of earnings) Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Statement of Comprehensive Income [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net Total other comprehensive income (loss) Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive (income) loss attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: Dividends to preferred stockholders Comprehensive income (loss) attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] GSE CRT Embedded Derivatives TBAs TBAs [Member] TBAs [Member] Future Contracts Interest Rate Swaption [Member] Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Line Items] Realized gain (loss) on derivative instruments, net Derivative Instruments, Realized Gain (Loss) on Settlement, Termination, Expiration or Exercise, Net Derivative Instruments, Realized Gain (Loss) on Settlement, Termination, Expiration or Exercise, Net Contractual net interest income (expense) Contractual Net Interest Expense (Income) Contractual Net Interest Expense (Income) Unrealized gain (loss), net Unrealized Gain (Loss) on Derivatives Gain (loss) on derivative instruments, net Numerator (Income) Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Basic Earnings: Earnings Per Share, Basic [Abstract] Net income (loss) available to common stockholders Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Income allocated to exchangeable senior notes Incremental Income Attributable To Conversion Of Debt Securities Incremental Income Attributable To Conversion Of Debt Securities Income (loss) allocated to non-controlling interest Incremental Income Allocated To Non-Controlling Interest Incremental Income Allocated To Non-Controlling Interest Dilutive net income (loss) available to stockholders Net Income (Loss) Available to Common Stockholders, Diluted Denominator (Weighted Average Shares) Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Basic Earnings: Weighted Average Number of Shares Outstanding, Basic [Abstract] Shares available to common stockholders (in shares) Effect of dilutive securities: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Restricted stock awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Non-controlling interest OP Units (in shares) Incremental Common Shares Attributable To Operating Partnership Unit Incremental common shares attributable to operating partnership unit. Exchangeable senior notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Dilutive Shares (in shares) Earnings (loss) per share: Earnings (loss) per share [Abstract] Earnings (loss) per share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Non-controlling interest Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Exchangeable Senior Notes Convertible Debt [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Potential common shares excluded from diluted earnings per common share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases/Advances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Ending balance ARM Adjustable Rate Residential Mortgage [Member] Agency-CMO Agency Collateralized Mortgage Obligations [Member] Agency collateralized mortgage obligations. GSE CRT Available-for-sale Securities Debt Securities, Available-for-sale Securities accounted for under fair value option Debt Securities, Trading, and Equity Securities, FV-NI Marketable Securities Less than one year Marketable Securities, Debt Maturities, Next Twelve Months, Fair Value Marketable Securities, Debt Maturities, Next Twelve Months, Fair Value Greater than one year and less than five years Marketable Securities, Debt Maturities, Year Two Through Five, Fair Value Marketable Securities, Debt Maturities, Year Two Through Five, Fair Value Greater than or equal to five years Marketable Securities, Debt Maturities, Greater Than Or Equal To Five Years, Fair Value Marketable Securities, Debt Maturities, Greater Than Or Equal To Five Years, Fair Value Total Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] TX TEXAS Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Hotel Hotel [Member] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Domain] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Type [Domain] Mezzanine Loan Private Placement [Member] Mortgage Loans on Real Estate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] Face Amount of Mortgages SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Carrying Amount of Mortgages SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Principal Amount of Loans Subject to Delinquent Principal or Interest SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans Percentage over base rate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate Reconciliation of Carrying Value of Mortgage Loans on Real Estate: SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] Beginning balance Additions: Mortgage Loans on Real Estate, Additions [Abstract] Mortgage Loans on Real Estate, Additions [Abstract] Originations and purchases of new loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan Amortization of commercial loan origination fees and premium (discount) Mortgage Loans On Real Estate, Amortization Of Commercial Loan Origination Fees And Premium (Discount) Mortgage Loans On Real Estate, Amortization Of Commercial Loan Origination Fees And Premium (Discount) Deductions: Mortgage Loans on Real Estate, Deductions [Abstract] Mortgage Loans on Real Estate, Deductions [Abstract] Collection of principal SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Collections of Principal Loss on foreign currency revaluation Mortgage Loans on Real Estate, Foreign Currency Translation Mortgage Loans on Real Estate, Foreign Currency Translation Ending balance Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Investments in unconsolidated ventures Investments in Unconsolidated Ventures [Member] Investments in Unconsolidated Ventures [Member] Variable Interest Entity Variable Interest Entity [Line Items] Carrying Amount Company's Maximum Risk of Loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Derivative, Maturity Periods [Axis] Derivative, Maturity Periods [Axis] Derivative, Maturity Periods [Axis] Derivative, Maturity Periods [Domain] Derivative, Maturity Periods [Domain] [Domain] for Derivative, Maturity Periods [Axis] 2020 Next Twelve Months [Member] Next Twelve Months [Member] 2021 Year Two [Member] Year Two [Member] 2022 Year Three [Member] Year Three [Member] 2023 Year Four [Member] Year Four [Member] 2024 Year Five [Member] Year Five [Member] Thereafter After Year Five [Member] After Year Five [Member] 1-Month LIBOR One-Month LIBOR [Member] One-Month LIBOR [Member] 3-Month LIBOR Three-Month LIBOR [Member] Three-Month LIBOR [Member] Notional Amount Weighted Average Fixed Pay Rate Derivative, Average Fixed Interest Rate Weighted Average Receive Rate Derivative, Weighted Average Receive Rate Derivative, Weighted Average Receive Rate Weighted Average Years to Maturity Derivative, Average Remaining Maturity Offsetting Assets and Liabilities Offsetting Assets And Liabilities Disclosure [Text Block] Offsetting Assets and Liabilities Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Derivatives and hedging Currency [Axis] Currency [Axis] All Currencies [Domain] All Currencies [Domain] Euro Euro Member Countries, Euro Currency Forward Contracts Derivative Instruments and Hedging Activities Disclosures Derivative Instruments and Hedging Activities Disclosures [Line Items] Reclass amount as a decrease to interest expense Loss to be reclassified during the next 12 months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Interest Rate Swaps Futures Contracts Derivatives, Fair Value Derivatives, Fair Value [Line Items] Derivative asset Derivative liabilities Invesco Advisers, Inc. Invesco Advisers, Inc. [Member] Invesco Advisers, Inc. [Member] Affiliated Entity Affiliated Entity [Member] Expenses from transactions with related party Investment in money market or mutual funds managed by affiliates of a related party Fee paid by company to manager as percentage of company's shareholders' equity Percentage Of Shareholders Equity Per Annum Paid As Management Fees Percentage of shareholders' equity per annum paid as management fees Termination fee multiplier Termination Fee Multiplier Termination Fee Multiplier Termination fees assessment period Termination Fees Assessment Period Termination Fees Assessment Period MBS Collateralized Mortgage Backed Securities [Member] Gross realized gains on sale of investments Marketable Securities, Realized Gain, Excluding Other Than Temporary Impairments Marketable Securities, Realized Gain, Excluding Other Than Temporary Impairments Gross realized losses on sale of investments Marketable Securities, Realized Loss, Excluding Other Than Temporary Impairments Marketable Securities, Realized Loss, Excluding Other Than Temporary Impairments Other-than-temporary impairment losses Net unrealized gains and losses on securities accounted for under the fair value option Marketable Securities, Unrealized Gain (Loss) Net unrealized gains (losses on trading securities) Debt Securities, Trading, Unrealized Gain (Loss) Total gain (loss) on investments, net Marketable Securities, Gain (Loss) Mortgage-Backed and Credit Risk Transfer Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Hybrid ARM Adjustable Rate Residential Mortgage, Including Hybrid Adjustable Rate Residential Mortgage [Member] Adjustable Rate Residential Mortgage, Including Hybrid Adjustable Rate Residential Mortgage [Member] Unsettled TBA securities Unsettled TBA Securities [Member] Unsettled TBA Securities [Member] Principal/ Notional Balance Unamortized Premium (Discount) Marketable Securities, Unamortized Premium (Discount) Marketable Securities, Unamortized Premium (Discount) Amortized Cost Marketable Securities, Amortized Cost Basis Marketable Securities, Amortized Cost Basis Unrealized Gain/ (Loss), net Marketable Securities, Accumulated Gross Unrealized Gain (Loss), Before Tax Marketable Securities, Accumulated Gross Unrealized Gain (Loss), Before Tax Period- end Weighted Average Yield Marketable Securities, Weighted Average Yield Rate Marketable Securities, Weighted Average Yield Rate Percentage of Agency-CMO interest only securities, principal balance Percentage of Agency Collateralized Mortgage Obligations Interest Only Securities, Principal Balance Percentage of Agency Collateralized Mortgage Obligations Interest Only Securities, Principal Balance Percentage of Agency-CMO interest only securities, amortized cost Percentage of Agency Collateralized Mortgage Obligations Interest Only Securities, Amortized Cost Percentage of Agency Collateralized Mortgage Obligations Interest Only Securities, Amortized Cost Percentage of Agency-CMO interest only securities, fair value Percentage Of Agency Collateralized Mortgage Obligations Interest Only Securities, Fair Value Percentage of Agency Collateralized Mortgage Obligations, Interest Only Securities, Fair Value