<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.8.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>325</ContextCount>
  <ElementCount>386</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>135</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CondensedConsolidatedBalanceSheetsUnaudited</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001501 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CondensedConsolidatedStatementsOfOperationsUnaudited</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeUnaudited</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004000 - Statement - CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CondensedConsolidatedStatementOfEquityUnaudited</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1005000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Organization and Business Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OrganizationAndBusinessOperations</Role>
      <ShortName>Organization and Business Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - Variable Interest Entities ("VIEs")</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/VariableInterestEntitiesVies</Role>
      <ShortName>Variable Interest Entities ("VIEs")</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecurities</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Commercial Loans Held-for-Investment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CommercialLoansHeldForInvestment</Role>
      <ShortName>Commercial Loans Held-for-Investment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OtherAssets</Role>
      <ShortName>Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/Borrowings</Role>
      <ShortName>Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Collateral Positions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CollateralPositions</Role>
      <ShortName>Collateral Positions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Derivatives and Hedging Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivities</Role>
      <ShortName>Derivatives and Hedging Activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - Offsetting Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OffsettingAssetsAndLiabilities</Role>
      <ShortName>Offsetting Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Fair Value of Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/FairValueOfFinancialInstruments</Role>
      <ShortName>Fair Value of Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Earnings per Common Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/EarningsPerCommonShare</Role>
      <ShortName>Earnings per Common Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - Non-controlling Interest - Operating Partnership</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/NonControllingInterestOperatingPartnership</Role>
      <ShortName>Non-controlling Interest - Operating Partnership</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2118100 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2202201 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.invesco.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Variable Interest Entities ("VIEs") (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/VariableInterestEntitiesViesTables</Role>
      <ShortName>Variable Interest Entities ("VIEs") (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/VariableInterestEntitiesVies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesTables</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecurities</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Commercial Loans Held-for-Investment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CommercialLoansHeldForInvestmentTables</Role>
      <ShortName>Commercial Loans Held-for-Investment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/CommercialLoansHeldForInvestment</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OtherAssetsTables</Role>
      <ShortName>Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/OtherAssets</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/BorrowingsTables</Role>
      <ShortName>Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/Borrowings</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Collateral Positions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CollateralPositionsTables</Role>
      <ShortName>Collateral Positions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/CollateralPositions</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Derivatives and Hedging Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesTables</Role>
      <ShortName>Derivatives and Hedging Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/DerivativesAndHedgingActivities</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2309301 - Disclosure - Offsetting Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OffsettingAssetsAndLiabilitiesTables</Role>
      <ShortName>Offsetting Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/OffsettingAssetsAndLiabilities</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - Fair Value of Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/FairValueOfFinancialInstrumentsTables</Role>
      <ShortName>Fair Value of Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/FairValueOfFinancialInstruments</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/RelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/RelatedPartyTransactions</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/ShareholdersEquityTables</Role>
      <ShortName>Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - Earnings per Common Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/EarningsPerCommonShareTables</Role>
      <ShortName>Earnings per Common Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/EarningsPerCommonShare</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2314301 - Disclosure - Non-controlling Interest - Operating Partnership (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/NonControllingInterestOperatingPartnershipTables</Role>
      <ShortName>Non-controlling Interest - Operating Partnership (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.invesco.com/role/NonControllingInterestOperatingPartnership</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2401401 - Disclosure - Organization and Business Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OrganizationAndBusinessOperationsDetail</Role>
      <ShortName>Organization and Business Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/OrganizationAndBusinessOperations</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/SummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - Variable Interest Entities ("VIEs") (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/VariableInterestEntitiesViesDetails</Role>
      <ShortName>Variable Interest Entities ("VIEs") (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/VariableInterestEntitiesViesTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Summary of Investment Portfolio (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesSummaryOfInvestmentPortfolioDetail</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Summary of Investment Portfolio (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2404403 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesAdditionalInformationDetail</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2404404 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Schedule of Fair Value of Available-for-sale Securities and Securities Accounted for under Fair Value Option by Asset Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesScheduleOfFairValueOfAvailableForSaleSecuritiesAndSecuritiesAccountedForUnderFairValueOptionByAssetTypeDetails</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Schedule of Fair Value of Available-for-sale Securities and Securities Accounted for under Fair Value Option by Asset Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2404405 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Components of Carrying Value of MBS and GSE CRT Portfolio (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesComponentsOfCarryingValueOfMbsAndGseCrtPortfolioDetail</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Components of Carrying Value of MBS and GSE CRT Portfolio (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2404406 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Fair Value of Mortgage-Backed Securities According to Weighted Average Life Classification (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesFairValueOfMortgageBackedSecuritiesAccordingToWeightedAverageLifeClassificationDetail</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Fair Value of Mortgage-Backed Securities According to Weighted Average Life Classification (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2404407 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Unrealized Losses and Estimated Fair Value of MBS and GSE CRT by Length of Time (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesUnrealizedLossesAndEstimatedFairValueOfMbsAndGseCrtByLengthOfTimeDetail</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Unrealized Losses and Estimated Fair Value of MBS and GSE CRT by Length of Time (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2404408 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - OTTI included in earnings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesOttiIncludedInEarningsDetails</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - OTTI included in earnings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2404409 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Realized Gain (Loss) on Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesRealizedGainLossOnInvestmentsDetails</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Realized Gain (Loss) on Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2404410 - Disclosure - Mortgage-Backed and Credit Risk Transfer Securities - Components of MBS and GSE CRT Interest Income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/MortgageBackedAndCreditRiskTransferSecuritiesComponentsOfMbsAndGseCrtInterestIncomeDetail</Role>
      <ShortName>Mortgage-Backed and Credit Risk Transfer Securities - Components of MBS and GSE CRT Interest Income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Commercial Loans Held-for-Investment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CommercialLoansHeldForInvestmentDetails</Role>
      <ShortName>Commercial Loans Held-for-Investment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/CommercialLoansHeldForInvestmentTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OtherAssetsDetails</Role>
      <ShortName>Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/OtherAssetsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - Borrowings - Schedule of Borrowings (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/BorrowingsScheduleOfBorrowingsDetail</Role>
      <ShortName>Borrowings - Schedule of Borrowings (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Borrowings - Schedule of Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/BorrowingsScheduleOfMaturitiesDetails</Role>
      <ShortName>Borrowings - Schedule of Maturities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2407404 - Disclosure - Borrowings - Repurchase Agreements (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/BorrowingsRepurchaseAgreementsDetail</Role>
      <ShortName>Borrowings - Repurchase Agreements (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2407405 - Disclosure - Borrowings - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/BorrowingsAdditionalInformationDetail</Role>
      <ShortName>Borrowings - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2407406 - Disclosure - Borrowings - Schedule of Retirement of Exchangeable Senior Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.invesco.com/role/BorrowingsScheduleOfRetirementOfExchangeableSeniorNotesDetails</Role>
      <ShortName>Borrowings - Schedule of Retirement of Exchangeable Senior Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Collateral Positions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CollateralPositionsDetails</Role>
      <ShortName>Collateral Positions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/CollateralPositionsTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Derivatives and Hedging Activities - Outstanding Interest Rate Swaptions and Derivative Instrument Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesOutstandingInterestRateSwaptionsAndDerivativeInstrumentInformationDetail</Role>
      <ShortName>Derivatives and Hedging Activities - Outstanding Interest Rate Swaptions and Derivative Instrument Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2408403 - Disclosure - Derivatives and Hedging Activities - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesAdditionalInformationDetail</Role>
      <ShortName>Derivatives and Hedging Activities - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Derivatives and Hedging Activities - Interest Rate Derivatives Outstanding Designated as Cash Flow Hedges (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesInterestRateDerivativesOutstandingDesignatedAsCashFlowHedgesDetail</Role>
      <ShortName>Derivatives and Hedging Activities - Interest Rate Derivatives Outstanding Designated as Cash Flow Hedges (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2408405 - Disclosure - Derivatives and Hedging Activities - Schedule of Credit Derivatives (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesScheduleOfCreditDerivativesDetail</Role>
      <ShortName>Derivatives and Hedging Activities - Schedule of Credit Derivatives (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2408406 - Disclosure - Derivatives and Hedging Activities - Fair Value of Derivative Financial Instruments and Classification on Balance Sheet (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesFairValueOfDerivativeFinancialInstrumentsAndClassificationOnBalanceSheetDetail</Role>
      <ShortName>Derivatives and Hedging Activities - Fair Value of Derivative Financial Instruments and Classification on Balance Sheet (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2408407 - Disclosure - Derivatives and Hedging Activities - Effect of Derivative Financial Instruments on Statement of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesEffectOfDerivativeFinancialInstrumentsOnStatementOfOperationsDetail</Role>
      <ShortName>Derivatives and Hedging Activities - Effect of Derivative Financial Instruments on Statement of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2408408 - Disclosure - Derivatives and Hedging Activities - Credit Risk Related Contingent Features (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/DerivativesAndHedgingActivitiesCreditRiskRelatedContingentFeaturesDetails</Role>
      <ShortName>Derivatives and Hedging Activities - Credit Risk Related Contingent Features (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - Offsetting Assets and Liabilities - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OffsettingAssetsAndLiabilitiesAdditionalInformationDetails</Role>
      <ShortName>Offsetting Assets and Liabilities - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2409403 - Disclosure - Offsetting Assets and Liabilities - Offsetting of Derivative Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OffsettingAssetsAndLiabilitiesOffsettingOfDerivativeAssetsDetail</Role>
      <ShortName>Offsetting Assets and Liabilities - Offsetting of Derivative Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2409404 - Disclosure - Offsetting Assets and Liabilities - Offsetting of Derivative Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/OffsettingAssetsAndLiabilitiesOffsettingOfDerivativeLiabilitiesDetail</Role>
      <ShortName>Offsetting Assets and Liabilities - Offsetting of Derivative Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2410402 - Disclosure - Fair Value of Financial Instruments - Fair Value Measured on Recurring Basis (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/FairValueOfFinancialInstrumentsFairValueMeasuredOnRecurringBasisDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Fair Value Measured on Recurring Basis (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Fair Value of Financial Instruments - Embedded Derivatives Level 3 Roll Forward (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/FairValueOfFinancialInstrumentsEmbeddedDerivativesLevel3RollForwardDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Embedded Derivatives Level 3 Roll Forward (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - Fair Value of Financial Instruments - Embedded Derivatives Fair Value Inputs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/FairValueOfFinancialInstrumentsEmbeddedDerivativesFairValueInputsDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Embedded Derivatives Fair Value Inputs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2410405 - Disclosure - Fair Value of Financial Instruments - Carrying Value and Estimated Fair Value of Financial Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/FairValueOfFinancialInstrumentsCarryingValueAndEstimatedFairValueOfFinancialInstrumentsDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Carrying Value and Estimated Fair Value of Financial Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Related Party Transactions - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/RelatedPartyTransactionsAdditionalInformationDetail</Role>
      <ShortName>Related Party Transactions - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Related Party Transactions - Schedule of Relater Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/RelatedPartyTransactionsScheduleOfRelaterPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions - Schedule of Relater Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - Stockholders' Equity - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/StockholdersEquityAdditionalInformationDetail</Role>
      <ShortName>Stockholders' Equity - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - Shareholders' Equity - Restricted Stock Units Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/ShareholdersEquityRestrictedStockUnitsActivityDetails</Role>
      <ShortName>Shareholders' Equity - Restricted Stock Units Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2412404 - Disclosure - Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/StockholdersEquityComponentsOfAccumulatedOtherComprehensiveIncomeDetails</Role>
      <ShortName>Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - Earnings per Common Share - Earnings per Share (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/EarningsPerCommonShareEarningsPerShareDetail</Role>
      <ShortName>Earnings per Common Share - Earnings per Share (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2414402 - Disclosure - Non-controlling Interest - Operating Partnership - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/NonControllingInterestOperatingPartnershipAdditionalInformationDetail</Role>
      <ShortName>Non-controlling Interest - Operating Partnership - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2414403 - Disclosure - Non-controlling Interest - Operating Partnership - Schedule of Income (Expense) Allocated and Distributions Paid to Noncontrolling Interests (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/NonControllingInterestOperatingPartnershipScheduleOfIncomeExpenseAllocatedAndDistributionsPaidToNoncontrollingInterestsDetails</Role>
      <ShortName>Non-controlling Interest - Operating Partnership - Schedule of Income (Expense) Allocated and Distributions Paid to Noncontrolling Interests (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="ivr-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2415401 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.invesco.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.invesco.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>81</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ivr-20180331.xml</File>
    <File>ivr-20180331.xsd</File>
    <File>ivr-20180331_cal.xml</File>
    <File>ivr-20180331_def.xml</File>
    <File>ivr-20180331_lab.xml</File>
    <File>ivr-20180331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/currency/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/invest/2013-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2014-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
