<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>263</ContextCount>
  <ElementCount>359</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>94</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001002 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1003004 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedStatementsofOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1004005 - Statement - Condensed Consolidated Statements of Operations (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedStatementsofOperationsParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Operations (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1005006 - Statement - Condensed Consolidated Statements of Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedStatementsofComprehensiveLoss</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1006007 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquity</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1007008 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CondensedConsolidatedStatementsofCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2101101 - Disclosure - Organization and business operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Organizationandbusinessoperations</Role>
      <ShortName>Organization and business operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2103102 - Disclosure - Summary of significant accounting policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Summaryofsignificantaccountingpolicies</Role>
      <ShortName>Summary of significant accounting policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2111103 - Disclosure - Business Combination</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/BusinessCombination</Role>
      <ShortName>Business Combination</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2113104 - Disclosure - Investments and fair value measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Investmentsandfairvaluemeasurements</Role>
      <ShortName>Investments and fair value measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2128105 - Disclosure - Revenue recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Revenuerecognition</Role>
      <ShortName>Revenue recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2131106 - Disclosure - Liability for loss and loss adjustment expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Liabilityforlossandlossadjustmentexpenses</Role>
      <ShortName>Liability for loss and loss adjustment expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2135107 - Disclosure - Segment information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Segmentinformation</Role>
      <ShortName>Segment information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2140108 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2142109 - Disclosure - Stock compensation expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Stockcompensationexpense</Role>
      <ShortName>Stock compensation expense</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2147110 - Disclosure - Earnings per share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Earningspershare</Role>
      <ShortName>Earnings per share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2151111 - Disclosure - Related party transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Relatedpartytransactions</Role>
      <ShortName>Related party transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2155112 - Disclosure - Commitment and contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Commitmentandcontingencies</Role>
      <ShortName>Commitment and contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2157113 - Disclosure - Accrued expenses and other liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Accruedexpensesandotherliabilities</Role>
      <ShortName>Accrued expenses and other liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2160114 - Disclosure - Employee benefit plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Employeebenefitplan</Role>
      <ShortName>Employee benefit plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2162115 - Disclosure - Research and development</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Researchanddevelopment</Role>
      <ShortName>Research and development</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2165116 - Disclosure - Warrant liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Warrantliabilities</Role>
      <ShortName>Warrant liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2167117 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2172118 - Disclosure - Subsequent events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/Subsequentevents</Role>
      <ShortName>Subsequent events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2204201 - Disclosure - Summary of significant accounting policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesPolicies</Role>
      <ShortName>Summary of significant accounting policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Summary of significant accounting policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesTables</Role>
      <ShortName>Summary of significant accounting policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Summaryofsignificantaccountingpolicies</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2314302 - Disclosure - Investments and fair value measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsTables</Role>
      <ShortName>Investments and fair value measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Investmentsandfairvaluemeasurements</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2329303 - Disclosure - Revenue recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/RevenuerecognitionTables</Role>
      <ShortName>Revenue recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Revenuerecognition</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2332304 - Disclosure - Liability for loss and loss adjustment expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LiabilityforlossandlossadjustmentexpensesTables</Role>
      <ShortName>Liability for loss and loss adjustment expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Liabilityforlossandlossadjustmentexpenses</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2336305 - Disclosure - Segment information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SegmentinformationTables</Role>
      <ShortName>Segment information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Segmentinformation</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2343306 - Disclosure - Stock compensation expense (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/StockcompensationexpenseTables</Role>
      <ShortName>Stock compensation expense (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Stockcompensationexpense</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2348307 - Disclosure - Earnings per share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/EarningspershareTables</Role>
      <ShortName>Earnings per share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Earningspershare</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2352308 - Disclosure - Related party transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/RelatedpartytransactionsTables</Role>
      <ShortName>Related party transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Relatedpartytransactions</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2358309 - Disclosure - Accrued expenses and other liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/AccruedexpensesandotherliabilitiesTables</Role>
      <ShortName>Accrued expenses and other liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Accruedexpensesandotherliabilities</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2363310 - Disclosure - Research and development (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/ResearchanddevelopmentTables</Role>
      <ShortName>Research and development (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Researchanddevelopment</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2368311 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://doma.com/role/Leases</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2402401 - Disclosure - Organization and business operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/OrganizationandbusinessoperationsDetails</Role>
      <ShortName>Organization and business operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/Organizationandbusinessoperations</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Summary of significant accounting policies - Title Plants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesTitlePlantsDetails</Role>
      <ShortName>Summary of significant accounting policies - Title Plants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Summary of significant accounting policies - Reinsurance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesReinsuranceDetails</Role>
      <ShortName>Summary of significant accounting policies - Reinsurance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Summary of significant accounting policies - Schedule of gross premiums written and ceded premiums (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesScheduleofgrosspremiumswrittenandcededpremiumsDetails</Role>
      <ShortName>Summary of significant accounting policies - Schedule of gross premiums written and ceded premiums (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2409405 - Disclosure - Summary of significant accounting policies - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesIncomeTaxesDetails</Role>
      <ShortName>Summary of significant accounting policies - Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2410406 - Disclosure - Summary of significant accounting policies - Recent Accounting Pronouncements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SummaryofsignificantaccountingpoliciesRecentAccountingPronouncementsDetails</Role>
      <ShortName>Summary of significant accounting policies - Recent Accounting Pronouncements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2412407 - Disclosure - Business Combination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/BusinessCombinationDetails</Role>
      <ShortName>Business Combination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/BusinessCombination</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2415408 - Disclosure - Investments and fair value measurements - Summary of Held-to-Maturity Debt Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofHeldtoMaturityDebtSecuritiesDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Held-to-Maturity Debt Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2416409 - Disclosure - Investments and fair value measurements - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsNarrativeDetails</Role>
      <ShortName>Investments and fair value measurements - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2417410 - Disclosure - Investments and fair value measurements - Summary of Held-to-Maturity Debt Securities Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofHeldtoMaturityDebtSecuritiesMaturityDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Held-to-Maturity Debt Securities Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2418411 - Disclosure - Investments and fair value measurements - Schedule of Unrealized Loss on Held-to-Maturity Debt Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsScheduleofUnrealizedLossonHeldtoMaturityDebtSecuritiesDetails</Role>
      <ShortName>Investments and fair value measurements - Schedule of Unrealized Loss on Held-to-Maturity Debt Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2419412 - Disclosure - Investments and fair value measurements - Debt Securities Held to Maturity Allowance for Credit Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsDebtSecuritiesHeldtoMaturityAllowanceforCreditLossDetails</Role>
      <ShortName>Investments and fair value measurements - Debt Securities Held to Maturity Allowance for Credit Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2420413 - Disclosure - Investments and fair value measurements - Summary of Realized Gains (Losses) on Available-for-Sale Debt Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofRealizedGainsLossesonAvailableforSaleDebtSecuritiesDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Realized Gains (Losses) on Available-for-Sale Debt Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2421414 - Disclosure - Investments and fair value measurements - Summary of Mortgage Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofMortgageLoansDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Mortgage Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2422415 - Disclosure - Investments and fair value measurements - Schedule of Investment Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsScheduleofInvestmentIncomeDetails</Role>
      <ShortName>Investments and fair value measurements - Schedule of Investment Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2423416 - Disclosure - Investments and fair value measurements - Summary of Accrued Interest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofAccruedInterestDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Accrued Interest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2424417 - Disclosure - Investments and fair value measurements - Summary of Company's Investments Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofCompanysInvestmentsMeasuredatFairValueDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Company's Investments Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2425418 - Disclosure - Investments and fair value measurements - Summary of Company's Liabilities Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofCompanysLiabilitiesMeasuredatFairValueDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Company's Liabilities Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2426419 - Disclosure - Investments and fair value measurements - Summary of Fair Values of the Sponsor Earnout Shares Using a Monte Carlo Simulation Valuation Model (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsSummaryofFairValuesoftheSponsorEarnoutSharesUsingaMonteCarloSimulationValuationModelDetails</Role>
      <ShortName>Investments and fair value measurements - Summary of Fair Values of the Sponsor Earnout Shares Using a Monte Carlo Simulation Valuation Model (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2427420 - Disclosure - Investments and fair value measurements - Changes for Level 3 Items Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/InvestmentsandfairvaluemeasurementsChangesforLevel3ItemsMeasuredatFairValueDetails</Role>
      <ShortName>Investments and fair value measurements - Changes for Level 3 Items Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2430421 - Disclosure - Revenue recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/RevenuerecognitionDetails</Role>
      <ShortName>Revenue recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/RevenuerecognitionTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2433422 - Disclosure - Liability for loss and loss adjustment expenses - Summary of Liability for Loss and Loss Adjustment Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LiabilityforlossandlossadjustmentexpensesSummaryofLiabilityforLossandLossAdjustmentExpensesDetails</Role>
      <ShortName>Liability for loss and loss adjustment expenses - Summary of Liability for Loss and Loss Adjustment Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2434423 - Disclosure - Liability for loss and loss adjustment expenses - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LiabilityforlossandlossadjustmentexpensesNarrativeDetails</Role>
      <ShortName>Liability for loss and loss adjustment expenses - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2437424 - Disclosure - Segment information - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SegmentinformationNarrativeDetails</Role>
      <ShortName>Segment information - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2438425 - Disclosure - Segment information - Summary of Operating Results by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SegmentinformationSummaryofOperatingResultsbySegmentDetails</Role>
      <ShortName>Segment information - Summary of Operating Results by Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2439426 - Disclosure - Segment information - Reconciliation of Adjusted Gross Profit to Loss Before Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SegmentinformationReconciliationofAdjustedGrossProfittoLossBeforeIncomeTaxesDetails</Role>
      <ShortName>Segment information - Reconciliation of Adjusted Gross Profit to Loss Before Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2441427 - Disclosure - Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/DebtDetails</Role>
      <ShortName>Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/Debt</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2444428 - Disclosure - Stock compensation expense - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/StockcompensationexpenseNarrativeDetails</Role>
      <ShortName>Stock compensation expense - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2445429 - Disclosure - Stock compensation expense - Summary of Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/StockcompensationexpenseSummaryofStockOptionsDetails</Role>
      <ShortName>Stock compensation expense - Summary of Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2446430 - Disclosure - Stock compensation expense - Nonvested Restricted Stock Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/StockcompensationexpenseNonvestedRestrictedStockAwardsDetails</Role>
      <ShortName>Stock compensation expense - Nonvested Restricted Stock Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2449431 - Disclosure - Earnings per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/EarningspershareDetails</Role>
      <ShortName>Earnings per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/EarningspershareTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2450432 - Disclosure - Earnings per share - Antidilutive Securities Excluded from Computation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/EarningspershareAntidilutiveSecuritiesExcludedfromComputationDetails</Role>
      <ShortName>Earnings per share - Antidilutive Securities Excluded from Computation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2453433 - Disclosure - Related party transactions - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/RelatedpartytransactionsNarrativeDetails</Role>
      <ShortName>Related party transactions - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2454434 - Disclosure - Related party transactions - Summary of Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/RelatedpartytransactionsSummaryofRelatedPartyTransactionsDetails</Role>
      <ShortName>Related party transactions - Summary of Related Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2456435 - Disclosure - Commitment and contingencies - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/CommitmentandcontingenciesNarrativeDetails</Role>
      <ShortName>Commitment and contingencies - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2459436 - Disclosure - Accrued expenses and other liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/AccruedexpensesandotherliabilitiesDetails</Role>
      <ShortName>Accrued expenses and other liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/AccruedexpensesandotherliabilitiesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2461437 - Disclosure - Employee benefit plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/EmployeebenefitplanDetails</Role>
      <ShortName>Employee benefit plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/Employeebenefitplan</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2464438 - Disclosure - Research and development (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/ResearchanddevelopmentDetails</Role>
      <ShortName>Research and development (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/ResearchanddevelopmentTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2466439 - Disclosure - Warrant liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/WarrantliabilitiesDetails</Role>
      <ShortName>Warrant liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/Warrantliabilities</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2469440 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2470441 - Disclosure - Leases - Lease Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LeasesLeaseCostDetails</Role>
      <ShortName>Leases - Lease Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2471442 - Disclosure - Leases - Lease Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/LeasesLeaseMaturityDetails</Role>
      <ShortName>Leases - Lease Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="doma-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2473443 - Disclosure - Subsequent events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://doma.com/role/SubsequenteventsDetails</Role>
      <ShortName>Subsequent events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://doma.com/role/Subsequentevents</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 doctype="10-Q" original="doma-20220331.htm">doma-20220331.htm</File>
    <File>doma-20220331.xsd</File>
    <File>doma-20220331_cal.xml</File>
    <File>doma-20220331_def.xml</File>
    <File>doma-20220331_lab.xml</File>
    <File>doma-20220331_pre.xml</File>
    <File>exhibit1001-formofrsuaward.htm</File>
    <File>exhibit311certificationoft.htm</File>
    <File>exhibit312certificationoft.htm</File>
    <File>exhibit321certificationoft.htm</File>
    <File>exhibit322certificationoft.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="808">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="34">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
