<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>927</ContextCount>
  <ElementCount>915</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>188</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>75000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>75010 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>75020 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>75030 - Statement - Consolidated Statements of Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedStatementsOfIncome</Role>
      <ShortName>Consolidated Statements of Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>75040 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>75050 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedStatementsOfStockholdersEquity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>75060 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedStatementsOfStockholdersEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>75070 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>75080 - Disclosure - Cybersecurity Risk Management, Strategy and Governance</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureCybersecurityRiskManagementStrategyAndGovernance</Role>
      <ShortName>Cybersecurity Risk Management, Strategy and Governance</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995457 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureNATUREOFOPERATIONSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995467 - Disclosure - BUSINESS COMBINATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBUSINESSCOMBINATIONS</Role>
      <ShortName>BUSINESS COMBINATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995477 - Disclosure - INVESTMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestments</Role>
      <ShortName>INVESTMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995487 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLOANSANDALLOWANCEFORCREDITLOSSES</Role>
      <ShortName>LOANS AND ALLOWANCE FOR CREDIT LOSSES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995497 - Disclosure - OTHER REAL ESTATE OWNED AND OTHER REPOSSESSED ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureOtherRealEstateOwnedAndOtherRepossessedAssets1</Role>
      <ShortName>OTHER REAL ESTATE OWNED AND OTHER REPOSSESSED ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995507 - Disclosure - PREMISES AND EQUIPMENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePREMISESANDEQUIPMENT</Role>
      <ShortName>PREMISES AND EQUIPMENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995517 - Disclosure - GOODWILL AND CORE DEPOSIT INTANGIBLES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureGOODWILLANDCOREDEPOSITINTANGIBLES</Role>
      <ShortName>GOODWILL AND CORE DEPOSIT INTANGIBLES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995527 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDERIVATIVEFINANCIALINSTRUMENTS</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995537 - Disclosure - DEPOSITS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDEPOSITS</Role>
      <ShortName>DEPOSITS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995547 - Disclosure - BORROWINGS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBORROWINGS</Role>
      <ShortName>BORROWINGS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995557 - Disclosure - SUBORDINATED DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSUBORDINATEDDEBT</Role>
      <ShortName>SUBORDINATED DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995567 - Disclosure - STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSTOCKHOLDERSEQUITY</Role>
      <ShortName>STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995577 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureINCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995587 - Disclosure - REGULATORY MATTERS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureREGULATORYMATTERS</Role>
      <ShortName>REGULATORY MATTERS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995597 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRELATEDPARTYTRANSACTIONS</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995607 - Disclosure - EMPLOYEE BENEFITS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEMPLOYEEBENEFITS</Role>
      <ShortName>EMPLOYEE BENEFITS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995617 - Disclosure - SHARE-BASED PAYMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSHAREBASEDPAYMENTS</Role>
      <ShortName>SHARE-BASED PAYMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995627 - Disclosure - EARNINGS PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEARNINGSPERSHARE</Role>
      <ShortName>EARNINGS PER SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995637 - Disclosure - FAIR VALUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFAIRVALUE</Role>
      <ShortName>FAIR VALUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995647 - Disclosure - COMMITMENTS AND CREDIT RISK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCOMMITMENTSANDCREDITRISK</Role>
      <ShortName>COMMITMENTS AND CREDIT RISK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995657 - Disclosure - LEGAL MATTERS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLEGALMATTERS</Role>
      <ShortName>LEGAL MATTERS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995667 - Disclosure - REVENUE RECOGNITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureREVENUERECOGNITION</Role>
      <ShortName>REVENUE RECOGNITION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995677 - Disclosure - SEGMENT REPORTING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReporting</Role>
      <ShortName>SEGMENT REPORTING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995687 - Disclosure - CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCONDENSEDFINANCIALINFORMATIONPARENTCOMPANYONLY</Role>
      <ShortName>CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995697 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995707 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureNATUREOFOPERATIONSANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995717 - Disclosure - BUSINESS COMBINATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBUSINESSCOMBINATIONSTables</Role>
      <ShortName>BUSINESS COMBINATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBUSINESSCOMBINATIONS</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995727 - Disclosure - INVESTMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsTables</Role>
      <ShortName>INVESTMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestments</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995737 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLOANSANDALLOWANCEFORCREDITLOSSESTables</Role>
      <ShortName>LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLOANSANDALLOWANCEFORCREDITLOSSES</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995747 - Disclosure - OTHER REAL ESTATE OWNED AND OTHER REPOSSESSED ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureOtherRealEstateOwnedAndOtherRepossessedAssetsTables</Role>
      <ShortName>OTHER REAL ESTATE OWNED AND OTHER REPOSSESSED ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureOtherRealEstateOwnedAndOtherRepossessedAssets1</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995757 - Disclosure - PREMISES AND EQUIPMENT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePREMISESANDEQUIPMENTTables</Role>
      <ShortName>PREMISES AND EQUIPMENT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePREMISESANDEQUIPMENT</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995767 - Disclosure - GOODWILL AND CORE DEPOSIT INTANGIBLES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureGOODWILLANDCOREDEPOSITINTANGIBLESTables</Role>
      <ShortName>GOODWILL AND CORE DEPOSIT INTANGIBLES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureGOODWILLANDCOREDEPOSITINTANGIBLES</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995777 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDERIVATIVEFINANCIALINSTRUMENTSTables</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDERIVATIVEFINANCIALINSTRUMENTS</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995787 - Disclosure - DEPOSITS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDEPOSITSTables</Role>
      <ShortName>DEPOSITS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDEPOSITS</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995797 - Disclosure - BORROWINGS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBORROWINGSTables</Role>
      <ShortName>BORROWINGS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBORROWINGS</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>995807 - Disclosure - SUBORDINATED DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSUBORDINATEDDEBTTables</Role>
      <ShortName>SUBORDINATED DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSUBORDINATEDDEBT</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>995817 - Disclosure - STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSTOCKHOLDERSEQUITYTables</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSTOCKHOLDERSEQUITY</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>995827 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureINCOMETAXESTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureINCOMETAXES</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>995837 - Disclosure - REGULATORY MATTERS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureREGULATORYMATTERSTables</Role>
      <ShortName>REGULATORY MATTERS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureREGULATORYMATTERS</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>995847 - Disclosure - RELATED PARTY TRANSACTIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRELATEDPARTYTRANSACTIONSTables</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRELATEDPARTYTRANSACTIONS</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>995857 - Disclosure - EMPLOYEE BENEFITS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEMPLOYEEBENEFITSTables</Role>
      <ShortName>EMPLOYEE BENEFITS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEMPLOYEEBENEFITS</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>995867 - Disclosure - SHARE-BASED PAYMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSHAREBASEDPAYMENTSTables</Role>
      <ShortName>SHARE-BASED PAYMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSHAREBASEDPAYMENTS</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>995877 - Disclosure - EARNINGS PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEARNINGSPERSHARETables</Role>
      <ShortName>EARNINGS PER SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEARNINGSPERSHARE</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>995887 - Disclosure - FAIR VALUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFAIRVALUETables</Role>
      <ShortName>FAIR VALUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFAIRVALUE</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>995897 - Disclosure - COMMITMENTS AND CREDIT RISK (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCOMMITMENTSANDCREDITRISKTables</Role>
      <ShortName>COMMITMENTS AND CREDIT RISK (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCOMMITMENTSANDCREDITRISK</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>995907 - Disclosure - REVENUE RECOGNITION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureREVENUERECOGNITIONTables</Role>
      <ShortName>REVENUE RECOGNITION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureREVENUERECOGNITION</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>995917 - Disclosure - SEGMENT REPORTING (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReportingTables</Role>
      <ShortName>SEGMENT REPORTING (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReporting</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>995927 - Disclosure - CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCONDENSEDFINANCIALINFORMATIONPARENTCOMPANYONLYTables</Role>
      <ShortName>CONDENSED FINANCIAL INFORMATION (PARENT COMPANY ONLY) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCONDENSEDFINANCIALINFORMATIONPARENTCOMPANYONLY</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>995937 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureNatureOfOperationsAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail</Role>
      <ShortName>Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>995947 - Disclosure - Business Combinations - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBusinessCombinationsAdditionalInformationDetail</Role>
      <ShortName>Business Combinations - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>995957 - Disclosure - Business Combinations - Summary of the Amounts of Assets Acquired and Liabilities Assumed Recognized at the Merger/Acquisition Date (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBusinessCombinationsSummaryOfAmountsOfAssetsAcquiredAndLiabilitiesAssumedRecognizedAtMergerAcquisitionDateDetail</Role>
      <ShortName>Business Combinations - Summary of the Amounts of Assets Acquired and Liabilities Assumed Recognized at the Merger/Acquisition Date (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>995967 - Disclosure - Business Combinations - Information about Loans Acquired (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBusinessCombinationsInformationAboutLoansAcquiredDetail</Role>
      <ShortName>Business Combinations - Information about Loans Acquired (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>995977 - Disclosure - Investments - Amortized Cost and Fair Value of Securities Available-for-Sale (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsAmortizedCostAndFairValueOfSecuritiesAvailableforsaleDetail</Role>
      <ShortName>Investments - Amortized Cost and Fair Value of Securities Available-for-Sale (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>995987 - Disclosure - Investments - Amortized Cost and Fair Value of Securities Held-to-Maturity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsAmortizedCostAndFairValueOfSecuritiesHeldtomaturityDetail</Role>
      <ShortName>Investments - Amortized Cost and Fair Value of Securities Held-to-Maturity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>995997 - Disclosure - Investments - Fair Value and Amortized Cost of Debt Securities by Contractual Maturity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsFairValueAndAmortizedCostOfDebtSecuritiesByContractualMaturityDetail</Role>
      <ShortName>Investments - Fair Value and Amortized Cost of Debt Securities by Contractual Maturity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>996007 - Disclosure - Investments - Carrying Value and Fair Value of Securities Pledged as Collateral to Secure Public Deposits (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsCarryingValueAndFairValueOfSecuritiesPledgedAsCollateralToSecurePublicDepositsDetail</Role>
      <ShortName>Investments - Carrying Value and Fair Value of Securities Pledged as Collateral to Secure Public Deposits (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>996017 - Disclosure - Investments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsAdditionalInformationDetail</Role>
      <ShortName>Investments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>996027 - Disclosure - Investments - Summary of Gross Unrealized Losses and Fair Value of Securities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsSummaryOfGrossUnrealizedLossesAndFairValueOfSecuritiesDetail</Role>
      <ShortName>Investments - Summary of Gross Unrealized Losses and Fair Value of Securities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>996037 - Disclosure - Investments - Summary of Proceeds from Sales and Associated Gains and Losses (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsSummaryOfProceedsFromSalesAndAssociatedGainsAndLossesDetail</Role>
      <ShortName>Investments - Summary of Proceeds from Sales and Associated Gains and Losses (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>996047 - Disclosure - Investments - Summary of Various Investment Balances and Method of Accounting (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsSummaryOfVariousInvestmentBalancesAndMethodOfAccountingDetails</Role>
      <ShortName>Investments - Summary of Various Investment Balances and Method of Accounting (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>996057 - Disclosure - Investments - Impact of Tax Credit Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureInvestmentsImpactOfTaxCreditInvestmentsDetails</Role>
      <ShortName>Investments - Impact of Tax Credit Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>996067 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Outstanding Balance of Loans (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfOutstandingBalanceOfLoansDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Outstanding Balance of Loans (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>996077 - Disclosure - Loans and Allowance for Credit Losses - Categories of Loans (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesCategoriesOfLoansDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Categories of Loans (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>996087 - Disclosure - Loans and Allowance for Credit Losses - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>996097 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Allowance for Loan Losses by Portfolio Segment Allowance (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentAllowanceDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Allowance for Loan Losses by Portfolio Segment Allowance (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>996107 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Loans Evaluated for Impairment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesScheduleOfLoansEvaluatedForImpairmentDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Loans Evaluated for Impairment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>996117 - Disclosure - Loans and Allowance for Credit Losses - Impaired Loans, Segregated by Class of Loans (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesImpairedLoansSegregatedByClassOfLoansDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Impaired Loans, Segregated by Class of Loans (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>996127 - Disclosure - Loans and Allowance for Credit Losses - Summary of Nonaccrual Interest Income Written Off (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfNonaccrualInterestIncomeWrittenOffDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Summary of Nonaccrual Interest Income Written Off (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>996137 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Aging of Recorded Investment in Past Due Loans by Segment and Class of Loans (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesScheduleOfAgingOfRecordedInvestmentInPastDueLoansBySegmentAndClassOfLoansDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Aging of Recorded Investment in Past Due Loans by Segment and Class of Loans (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>996147 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses on Off-Balance Sheet Credit Exposures (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesScheduleOfAllowanceForCreditLossesOnOffBalanceSheetCreditExposuresDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses on Off-Balance Sheet Credit Exposures (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>996157 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Risk Category of Loans by Class of Loans (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureLoansAndAllowanceForCreditLossesScheduleOfRiskCategoryOfLoansByClassOfLoansDetail</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Risk Category of Loans by Class of Loans (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>996167 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Charge-off and Recovery Activity by Loan Type and Year of Origination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfChargeoffAndRecoveryActivityByLoanTypeAndYearOfOriginationDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Charge-off and Recovery Activity by Loan Type and Year of Origination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>996177 - Disclosure - Loans and Allowance for Credit Losses - Summary of Amortized Cost Basis of Loans Modified (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAmortizedCostBasisOfLoansModifiedDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Summary of Amortized Cost Basis of Loans Modified (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>996187 - Disclosure - Loans And Allowance For Credit Loss - Summary of Performance of Loans Modified (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossSummaryOfPerformanceOfLoansModifiedDetails</Role>
      <ShortName>Loans And Allowance For Credit Loss - Summary of Performance of Loans Modified (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>996197 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Financial Effect of Loan Modifications to Borrowers Experiencing Financial Difficulty (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfFinancialEffectOfLoanModificationsToBorrowersExperiencingFinancialDifficultyDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Schedule of Financial Effect of Loan Modifications to Borrowers Experiencing Financial Difficulty (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>996207 - Disclosure - Other Real Estate Owned And Other Repossessed Assets - Schedule for Changes in Other Real Estate Owned And Other Repossessed Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureOtherRealEstateOwnedAndOtherRepossessedAssetsScheduleForChangesInOtherRealEstateOwnedAndOtherRepossessedAssetsDetail</Role>
      <ShortName>Other Real Estate Owned And Other Repossessed Assets - Schedule for Changes in Other Real Estate Owned And Other Repossessed Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>996217 - Disclosure - Other Real Estate Owned And Other Repossessed Assets - Summary of Other Real Estate Owned Expense And Other Repossessed Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureOtherRealEstateOwnedAndOtherRepossessedAssetsSummaryOfOtherRealEstateOwnedExpenseAndOtherRepossessedAssetsDetail</Role>
      <ShortName>Other Real Estate Owned And Other Repossessed Assets - Summary of Other Real Estate Owned Expense And Other Repossessed Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>996227 - Disclosure - Other Real Estate Owned And Other Repossessed Assets - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureOtherRealEstateOwnedAndOtherRepossessedAssetsAdditionalInformationDetail</Role>
      <ShortName>Other Real Estate Owned And Other Repossessed Assets - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>996237 - Disclosure - Premises and Equipment - Schedule of Premises and Equipment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePremisesAndEquipmentScheduleOfPremisesAndEquipmentDetail</Role>
      <ShortName>Premises and Equipment - Schedule of Premises and Equipment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>996247 - Disclosure - Premises and Equipment - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePremisesAndEquipmentAdditionalInformationDetail</Role>
      <ShortName>Premises and Equipment - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>996257 - Disclosure - Premises and Equipment - Schedule of Right-of-use Asset and Lease Obligations by Type of Property (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePremisesAndEquipmentScheduleOfRightOfUseAssetAndLeaseObligationsByTypeOfPropertyDetail</Role>
      <ShortName>Premises and Equipment - Schedule of Right-of-use Asset and Lease Obligations by Type of Property (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>996267 - Disclosure - Premises and Equipment - Schedule of Operating Lease Costs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePremisesAndEquipmentScheduleOfOperatingLeaseCostsDetail</Role>
      <ShortName>Premises and Equipment - Schedule of Operating Lease Costs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>996277 - Disclosure - Premises and Equipment - Schedule of Maturity Analysis of Operating Lease Liabilities and Reconciliation of Undiscounted Cash Flows to Total Operating Lease Liability (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosurePremisesAndEquipmentScheduleOfMaturityAnalysisOfOperatingLeaseLiabilitiesAndReconciliationOfUndiscountedCashFlowsToTotalOperatingLeaseLiabilityDetail</Role>
      <ShortName>Premises and Equipment - Schedule of Maturity Analysis of Operating Lease Liabilities and Reconciliation of Undiscounted Cash Flows to Total Operating Lease Liability (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>996297 - Disclosure - Goodwill and Core Deposit Intangibles - Schedule of Intangible Assets and Goodwill (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureGoodwillAndCoreDepositIntangiblesScheduleOfIntangibleAssetsAndGoodwillDetail</Role>
      <ShortName>Goodwill and Core Deposit Intangibles - Schedule of Intangible Assets and Goodwill (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>996307 - Disclosure - Goodwill and Core Deposit Intangibles - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureGoodwillAndCoreDepositIntangiblesScheduleOfFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetail</Role>
      <ShortName>Goodwill and Core Deposit Intangibles - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>996317 - Disclosure - Derivative Financial Instruments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDerivativeFinancialInstrumentsAdditionalInformationDetail</Role>
      <ShortName>Derivative Financial Instruments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>996327 - Disclosure - Derivative Financial Instruments - Summary of Interest Rate Swaps Designated as Cash Flow Hedges (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureDerivativeFinancialInstrumentsSummaryOfInterestRateSwapsDesignatedAsCashFlowHedgesDetails</Role>
      <ShortName>Derivative Financial Instruments - Summary of Interest Rate Swaps Designated as Cash Flow Hedges (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>996337 - Disclosure - Derivative Financial Instruments - Summary of Notional Balance and Fair Values of Derivatives Outstanding (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDerivativeFinancialInstrumentsSummaryOfNotionalBalanceAndFairValuesOfDerivativesOutstandingDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Notional Balance and Fair Values of Derivatives Outstanding (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>996347 - Disclosure - Derivative Financial Instruments - Summary of Net Gains or Losses on Derivatives and Hedging Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDerivativeFinancialInstrumentsSummaryOfNetGainsOrLossesOnDerivativesAndHedgingActivitiesDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Net Gains or Losses on Derivatives and Hedging Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>996357 - Disclosure - Derivative Financial Instruments - Summary of Recorded Net Gains or Losses on Derivatives and Related Hedged Items in Fair Value Hedging Relationships (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDerivativeFinancialInstrumentsSummaryOfRecordedNetGainsOrLossesOnDerivativesAndRelatedHedgedItemsInFairValueHedgingRelationshipsDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Recorded Net Gains or Losses on Derivatives and Related Hedged Items in Fair Value Hedging Relationships (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>996367 - Disclosure - Derivative Financial Instruments - Summary of Designated and Qualifying Hedged Items in Fair Value Hedges (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureDerivativeFinancialInstrumentsSummaryOfDesignatedAndQualifyingHedgedItemsInFairValueHedgesDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Designated and Qualifying Hedged Items in Fair Value Hedges (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>996377 - Disclosure - Derivative Financial Instruments - Summary of Net Gains or Losses on Derivatives and Related Hedged Items in Cash Flow Hedging Relationships (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureDerivativeFinancialInstrumentsSummaryOfNetGainsOrLossesOnDerivativesAndRelatedHedgedItemsInCashFlowHedgingRelationshipsDetails</Role>
      <ShortName>Derivative Financial Instruments - Summary of Net Gains or Losses on Derivatives and Related Hedged Items in Cash Flow Hedging Relationships (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>996387 - Disclosure - Deposits - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDepositsAdditionalInformationDetail</Role>
      <ShortName>Deposits - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>996397 - Disclosure - Deposits - Summary of Reciprocal and Brokered Deposits (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDepositsSummaryOfReciprocalAndBrokeredDepositsDetail</Role>
      <ShortName>Deposits - Summary of Reciprocal and Brokered Deposits (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>996407 - Disclosure - Deposits - Summary of Scheduled Maturities of Time Deposits (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureDepositsSummaryOfScheduledMaturitiesOfTimeDepositsDetail</Role>
      <ShortName>Deposits - Summary of Scheduled Maturities of Time Deposits (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>996417 - Disclosure - Borrowings - Schedule of Federal Funds Purchased and Retail Repurchase Agreements (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBorrowingsScheduleOfFederalFundsPurchasedAndRetailRepurchaseAgreementsDetail</Role>
      <ShortName>Borrowings - Schedule of Federal Funds Purchased and Retail Repurchase Agreements (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>996427 - Disclosure - Borrowings - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBorrowingsAdditionalInformationDetail</Role>
      <ShortName>Borrowings - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>996437 - Disclosure - Borrowings - Schedule of Borrowing Usage and Interest Rate Information for Federal Funds Purchased and Retail Repurchase Agreements (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBorrowingsScheduleOfBorrowingUsageAndInterestRateInformationForFederalFundsPurchasedAndRetailRepurchaseAgreementsDetail</Role>
      <ShortName>Borrowings - Schedule of Borrowing Usage and Interest Rate Information for Federal Funds Purchased and Retail Repurchase Agreements (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>996447 - Disclosure - Borrowings - Summary of Federal Home Loan Bank Advances (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureBorrowingsSummaryOfFederalHomeLoanBankAdvancesDetail</Role>
      <ShortName>Borrowings - Summary of Federal Home Loan Bank Advances (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>996457 - Disclosure - Subordinated Debt - Schedule of Total Subordinated Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSubordinatedDebtScheduleOfTotalSubordinatedDebtDetail</Role>
      <ShortName>Subordinated Debt - Schedule of Total Subordinated Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>996467 - Disclosure - Subordinated Debt - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSubordinatedDebtAdditionalInformationDetail</Role>
      <ShortName>Subordinated Debt - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>996477 - Disclosure - Subordinated Debt - Summary of Contractual Balance and Unamortized Fair Value Adjustments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSubordinatedDebtSummaryOfContractualBalanceAndUnamortizedFairValueAdjustmentsDetail</Role>
      <ShortName>Subordinated Debt - Summary of Contractual Balance and Unamortized Fair Value Adjustments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>996487 - Disclosure - Subordinated Debt - Schedule of Subordinated Notes (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSubordinatedDebtScheduleOfSubordinatedNotesDetail</Role>
      <ShortName>Subordinated Debt - Schedule of Subordinated Notes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>996497 - Disclosure - Subordinated Debt - Schedule of Future Principal Repayments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureSubordinatedDebtScheduleOfFuturePrincipalRepaymentsDetail</Role>
      <ShortName>Subordinated Debt - Schedule of Future Principal Repayments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>996507 - Disclosure - Contractual Obligations - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureContractualObligationsAdditionalInformationDetail</Role>
      <ShortName>Contractual Obligations - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>996517 - Disclosure - Stockholders' Equity - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureStockholdersEquityAdditionalInformationDetail</Role>
      <ShortName>Stockholders' Equity - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>996527 - Disclosure - Stockholders' Equity - Summary of Shares Issued and Held in Treasury or Outstanding (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureStockholdersEquitySummaryOfSharesIssuedAndHeldInTreasuryOrOutstandingDetail</Role>
      <ShortName>Stockholders' Equity - Summary of Shares Issued and Held in Treasury or Outstanding (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>996537 - Disclosure - Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureStockholdersEquityComponentsOfAccumulatedOtherComprehensiveIncomeDetail</Role>
      <ShortName>Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>996547 - Disclosure - Income Taxes - Schedule of Components of Income Tax Expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseDetail</Role>
      <ShortName>Income Taxes - Schedule of Components of Income Tax Expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>996557 - Disclosure - Income Taxes - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureIncomeTaxesAdditionalInformationDetail</Role>
      <ShortName>Income Taxes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>122</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>996567 - Disclosure - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfEffectiveIncomeTaxRateReconciliationDetail</Role>
      <ShortName>Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>123</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>996577 - Disclosure - Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureIncomeTaxesComponentsOfDeferredTaxAssetsAndLiabilitiesDetail</Role>
      <ShortName>Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>124</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>996587 - Disclosure - Income Taxes - Summary of Income Taxes Paid (Net of Refunds Received) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureIncomeTaxesSummaryOfIncomeTaxesPaidNetOfRefundsReceivedDetail</Role>
      <ShortName>Income Taxes - Summary of Income Taxes Paid (Net of Refunds Received) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>125</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>996597 - Disclosure - Regulatory Matters - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRegulatoryMattersAdditionalInformationDetail</Role>
      <ShortName>Regulatory Matters - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>126</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>996607 - Disclosure - Regulatory Matters - Summary of Company's and Equity Bank's Capital Amounts and Ratios (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRegulatoryMattersSummaryOfCompanySAndEquityBankSCapitalAmountsAndRatiosDetail</Role>
      <ShortName>Regulatory Matters - Summary of Company's and Equity Bank's Capital Amounts and Ratios (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>127</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>996617 - Disclosure - Related Party Transactions - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRelatedPartyTransactionsAdditionalInformationDetail</Role>
      <ShortName>Related Party Transactions - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>128</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>996627 - Disclosure - Related Party Transactions - Changes in Loans Outstanding to Related Parties (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRelatedPartyTransactionsChangesInLoansOutstandingToRelatedPartiesDetail</Role>
      <ShortName>Related Party Transactions - Changes in Loans Outstanding to Related Parties (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>129</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R130.htm</HtmlFileName>
      <LongName>996637 - Disclosure - Employee Benefits - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEmployeeBenefitsAdditionalInformationDetail</Role>
      <ShortName>Employee Benefits - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>130</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R131.htm</HtmlFileName>
      <LongName>996647 - Disclosure - Employee Benefits - Schedule of Net Pension Cost and Funded Status (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEmployeeBenefitsScheduleOfNetPensionCostAndFundedStatusDetail</Role>
      <ShortName>Employee Benefits - Schedule of Net Pension Cost and Funded Status (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>131</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R132.htm</HtmlFileName>
      <LongName>996657 - Disclosure - Share-Based Payments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureShareBasedPaymentsAdditionalInformationDetail</Role>
      <ShortName>Share-Based Payments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>132</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R133.htm</HtmlFileName>
      <LongName>996667 - Disclosure - Share-Based Payments - Summary of Share and Expense Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSharebasedPaymentsSummaryOfShareAndExpenseActivityDetails</Role>
      <ShortName>Share-Based Payments - Summary of Share and Expense Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>133</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R134.htm</HtmlFileName>
      <LongName>996677 - Disclosure - Share-Based Payments - Summary of Stock Option Activity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureShareBasedPaymentsSummaryOfStockOptionActivityDetail</Role>
      <ShortName>Share-Based Payments - Summary of Stock Option Activity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>134</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R135.htm</HtmlFileName>
      <LongName>996687 - Disclosure - Share-Based Payments - Schedule of Fair Values of Options Granted (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureShareBasedPaymentsScheduleOfFairValuesOfOptionsGrantedDetail</Role>
      <ShortName>Share-Based Payments - Schedule of Fair Values of Options Granted (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>135</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>996697 - Disclosure - Share-Based Payments - Summary of Changes in Company's Non-vested RSUs/RSAs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSharebasedPaymentsSummaryOfChangesInCompanysNonvestedRsusrsasDetail</Role>
      <ShortName>Share-Based Payments - Summary of Changes in Company's Non-vested RSUs/RSAs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>136</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R137.htm</HtmlFileName>
      <LongName>996707 - Disclosure - Share-Based Payments - Summary of Offering Periods and Costs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureShareBasedPaymentsSummaryOfOfferingPeriodsAndCostsDetail</Role>
      <ShortName>Share-Based Payments - Summary of Offering Periods and Costs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>137</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R138.htm</HtmlFileName>
      <LongName>996717 - Disclosure - Earnings Per Share - Summary of Earnings Per Share (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureEarningsPerShareSummaryOfEarningsPerShareDetail</Role>
      <ShortName>Earnings Per Share - Summary of Earnings Per Share (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>138</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R139.htm</HtmlFileName>
      <LongName>996727 - Disclosure - Earnings Per Share - Schedule of Average Outstanding Stock Options and RSUs Not Included in Computation of Diluted Earnings (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureEarningsPerShareScheduleOfAverageOutstandingStockOptionsAndRsusNotIncludedInComputationOfDilutedEarningsLossDetails</Role>
      <ShortName>Earnings Per Share - Schedule of Average Outstanding Stock Options and RSUs Not Included in Computation of Diluted Earnings (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>139</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R140.htm</HtmlFileName>
      <LongName>996737 - Disclosure - Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFairValueAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail</Role>
      <ShortName>Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>140</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R141.htm</HtmlFileName>
      <LongName>996747 - Disclosure - Fair Value - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFairValueAdditionalInformationDetail</Role>
      <ShortName>Fair Value - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>141</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R142.htm</HtmlFileName>
      <LongName>996757 - Disclosure - Fair Value - Summary of Assets Measured at Fair Value on Non-recurring Basis (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFairValueSummaryOfAssetsMeasuredAtFairValueOnNonRecurringBasisDetail</Role>
      <ShortName>Fair Value - Summary of Assets Measured at Fair Value on Non-recurring Basis (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>142</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R143.htm</HtmlFileName>
      <LongName>996767 - Disclosure - Fair Value - Summary of Additional Information about Unobservable Inputs Used in Fair Value Measurement (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFairValueSummaryOfAdditionalInformationAboutUnobservableInputsUsedInFairValueMeasurementDetail</Role>
      <ShortName>Fair Value - Summary of Additional Information about Unobservable Inputs Used in Fair Value Measurement (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>143</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R144.htm</HtmlFileName>
      <LongName>996777 - Disclosure - Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instrument (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureFairValueCarryingAmountsAndEstimatedFairValuesOfFinancialInstrumentDetail</Role>
      <ShortName>Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instrument (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>144</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R145.htm</HtmlFileName>
      <LongName>996787 - Disclosure - Commitments and Credit Risk - Summary of Contractual Amounts of Commitments and Standby Letters of Credit to Originate Loans and Available Lines of Credit (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCommitmentsAndCreditRiskSummaryOfContractualAmountsOfCommitmentsAndStandbyLettersOfCreditToOriginateLoansAndAvailableLinesOfCreditDetail</Role>
      <ShortName>Commitments and Credit Risk - Summary of Contractual Amounts of Commitments and Standby Letters of Credit to Originate Loans and Available Lines of Credit (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>145</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R146.htm</HtmlFileName>
      <LongName>996797 - Disclosure - Commitments and Credit Risk - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCommitmentsAndCreditRiskAdditionalInformationDetail</Role>
      <ShortName>Commitments and Credit Risk - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>146</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R147.htm</HtmlFileName>
      <LongName>996807 - Disclosure - Legal Matters - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureLegalMattersAdditionalInformationDetails</Role>
      <ShortName>Legal Matters - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>147</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R148.htm</HtmlFileName>
      <LongName>996817 - Disclosure - Revenue Recognition - Summary of Company's Source of Non-interest Income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureRevenueRecognitionSummaryOfCompanySSourceOfNonInterestIncomeDetail</Role>
      <ShortName>Revenue Recognition - Summary of Company's Source of Non-interest Income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>148</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R149.htm</HtmlFileName>
      <LongName>996827 - Disclosure - Segment Reporting - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetail</Role>
      <ShortName>Segment Reporting - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>149</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R150.htm</HtmlFileName>
      <LongName>996837 - Disclosure - Segment Reporting - Reconciliations of Reportable Segment Revenues and Measures of Profit or Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReportingReconciliationsOfReportableSegmentRevenuesAndMeasuresOfProfitOrLossDetails</Role>
      <ShortName>Segment Reporting - Reconciliations of Reportable Segment Revenues and Measures of Profit or Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>150</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R151.htm</HtmlFileName>
      <LongName>996847 - Disclosure - Segment Reporting - Schedule of Significant Segment Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReportingScheduleOfSignificantSegmentExpensesDetails</Role>
      <ShortName>Segment Reporting - Schedule of Significant Segment Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>151</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R152.htm</HtmlFileName>
      <LongName>996857 - Disclosure - Segment Reporting - Schedule of Significant Segment Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSegmentReportingScheduleOfSignificantSegmentAssetsDetails</Role>
      <ShortName>Segment Reporting - Schedule of Significant Segment Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>152</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R153.htm</HtmlFileName>
      <LongName>996867 - Disclosure - Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCondensedFinancialInformationParentCompanyOnlyCondensedBalanceSheetsDetail</Role>
      <ShortName>Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>153</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R154.htm</HtmlFileName>
      <LongName>996877 - Disclosure - Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCondensedFinancialInformationParentCompanyOnlyCondensedStatementsOfIncomeDetail</Role>
      <ShortName>Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>154</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R155.htm</HtmlFileName>
      <LongName>996887 - Disclosure - Condensed Financial Information (Parent Company Only) - Condensed Statements of Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/Role_DisclosureCondensedFinancialInformationParentCompanyOnlyCondensedStatementsOfCashFlowsDetail</Role>
      <ShortName>Condensed Financial Information (Parent Company Only) - Condensed Statements of Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>155</Position>
    </Report>
    <Report instance="eqbk-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R156.htm</HtmlFileName>
      <LongName>996897 - Disclosure - Subsequent Events - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://investor.equitybank.com/20251231/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetails</Role>
      <ShortName>Subsequent Events - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>156</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-K" isDefinitelyFs="true" isUsgaap="true" original="eqbk-20251231.htm">eqbk-20251231.htm</File>
    <File>eqbk-20251231.xsd</File>
  </InputFiles>
  <SupplementalFiles>
    <File>img68800395_0.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="7">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="2789">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="42">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
