<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1018</ContextCount>
  <ElementCount>25</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>301</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>3</UnitCount>
  <MyReports>
    <Report instance="primary-document.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>030000 - Disclosure - Form N-CSR Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/oef/role/NcsrCover</Role>
      <ShortName>Form N-CSR Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="primary-document.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>030001 - Disclosure - Shareholder Report</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/oef/role/ShareholderReport</Role>
      <ShortName>Shareholder Report</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="primary-document.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>040020 - Disclosure - Shareholder Report, Holdings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails</Role>
      <ShortName>Shareholder Report, Holdings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>3</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="N-CSRS" isDefinitelyNotFs="true" isNcsr="true" isOEF="true" isRRorOEF="true" isUsgaap="true" original="primary-document.htm">primary-document.htm</File>
    <File>thvnt-20260430.xsd</File>
  </InputFiles>
  <SupplementalFiles>
    <File>i0c8ef7eb11487523db0a3721.jpg</File>
    <File>i0c986ed60a6965b1688ca9de.jpg</File>
    <File>i1042395398bc90245dc802b5.jpg</File>
    <File>i150f531fe683197541678861.jpg</File>
    <File>i16ad7ab2de6c7d5d7b95e7b3.jpg</File>
    <File>i26b30b34757f40b72e0f0abf.jpg</File>
    <File>i2bdec734b8bdc7dc8caef18b.jpg</File>
    <File>i3c894a7198c850c768a0a6db.jpg</File>
    <File>i434656c375c3f2e139267cf7.jpg</File>
    <File>i4dd52664617991dfc5204712.jpg</File>
    <File>i5487945c2cac9759837d23d8.jpg</File>
    <File>i5d74120e1701bda04af7a622.jpg</File>
    <File>i639ef2d0c2f3798009a415c5.jpg</File>
    <File>i713d1e8d10ff3ad0e005b7bd.jpg</File>
    <File>i78d53c72175e718d25ee9cdf.jpg</File>
    <File>i82535a5b69ca517fbd0d49e5.jpg</File>
    <File>i89048f45035a6c184d6fda66.jpg</File>
    <File>i8ec2ec7c9c5b694491ec5fba.jpg</File>
    <File>i94e12578495bcb94667a56b6.jpg</File>
    <File>i9b4a19da83384ea41e2b05db.jpg</File>
    <File>i9f9e16563be7505468e72569.jpg</File>
    <File>ia8d4d889425eb6d4a55e82b2.jpg</File>
    <File>ic1270a43205fc60bddbdb5e3.jpg</File>
    <File>ic2433dcaafbe8d580b34c9b6.jpg</File>
    <File>id653b9200a9928f274a31e55.jpg</File>
    <File>ida02ac859355be5226cc9ec7.jpg</File>
    <File>idc32e7fab372165453fe8a2e.jpg</File>
    <File>ie8578049929a31f841fcb74b.jpg</File>
    <File>ieeab373ba8180977aa2e7c31.jpg</File>
    <File>if2e775de77231ffc07059301.jpg</File>
    <File>ifbea85d31214a3777be8b381.jpg</File>
    <File>ifcf665fcf59eda2b46ac97aa.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="76">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="45">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="1461">http://xbrl.sec.gov/oef/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
