<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>316</ContextCount>
  <ElementCount>433</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>62</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995200090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200105 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995200200 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedStatementsOfOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200300 - Statement - Consolidated Statements of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200400 - Statement - Consolidated Statements of Changes in Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedStatementsOfChangesInEquity</Role>
      <ShortName>Consolidated Statements of Changes in Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995200405 - Statement - Consolidated Statements of Changes in Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedStatementsOfChangesInEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Changes in Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995200500 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - Debt Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecurities</Role>
      <ShortName>Debt Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - Loans and Allowance for Credit Losses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLosses</Role>
      <ShortName>Loans and Allowance for Credit Losses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - Office Properties and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureOfficePropertiesAndEquipment</Role>
      <ShortName>Office Properties and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - Mortgage Servicing Rights</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureMortgageServicingRights</Role>
      <ShortName>Mortgage Servicing Rights</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - Deposits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDeposits</Role>
      <ShortName>Deposits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - Borrowed Funds</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureBorrowedFunds</Role>
      <ShortName>Borrowed Funds</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - Employee Benefit Plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEmployeeBenefitPlan</Role>
      <ShortName>Employee Benefit Plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995211001 - Disclosure - Deferred Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDeferredCompensation</Role>
      <ShortName>Deferred Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995211101 - Disclosure - Commitments Contingencies and Credit Risk</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCommitmentsContingenciesAndCreditRisk</Role>
      <ShortName>Commitments Contingencies and Credit Risk</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995211201 - Disclosure - Equity and Regulatory Matters</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEquityAndRegulatoryMatters</Role>
      <ShortName>Equity and Regulatory Matters</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995211301 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995211401 - Disclosure - Fair Value of Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureFairValueOfFinancialInstruments</Role>
      <ShortName>Fair Value of Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995211501 - Disclosure - Derivatives</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDerivatives</Role>
      <ShortName>Derivatives</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995211601 - Disclosure - Earnings Per Share ("EPS")</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEarningsPerShareeps</Role>
      <ShortName>Earnings Per Share ("EPS")</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995211701 - Disclosure - ESOP</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEsop</Role>
      <ShortName>ESOP</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995211801 - Disclosure - Condensed Parent Only Financial Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCondensedParentOnlyFinancialInformation</Role>
      <ShortName>Condensed Parent Only Financial Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995211901 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureSegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.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>28</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.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>29</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.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>30</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>99920102 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>99930203 - Disclosure - Debt Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesTables</Role>
      <ShortName>Debt Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureDebtSecurities</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>99930303 - Disclosure - Loans and Allowance for Credit Losses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesTables</Role>
      <ShortName>Loans and Allowance for Credit Losses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLosses</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>99930403 - Disclosure - Office Properties and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureOfficePropertiesAndEquipmentTables</Role>
      <ShortName>Office Properties and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureOfficePropertiesAndEquipment</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>99930503 - Disclosure - Mortgage Servicing Rights (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureMortgageServicingRightsTables</Role>
      <ShortName>Mortgage Servicing Rights (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureMortgageServicingRights</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - Deposits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDepositsTables</Role>
      <ShortName>Deposits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureDeposits</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>99930703 - Disclosure - Borrowed Funds (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureBorrowedFundsTables</Role>
      <ShortName>Borrowed Funds (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureBorrowedFunds</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>99930803 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>99931103 - Disclosure - Commitments Contingencies and Credit Risk (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCommitmentsContingenciesAndCreditRiskTables</Role>
      <ShortName>Commitments Contingencies and Credit Risk (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureCommitmentsContingenciesAndCreditRisk</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>99931203 - Disclosure - Equity and Regulatory Matters (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEquityAndRegulatoryMattersTables</Role>
      <ShortName>Equity and Regulatory Matters (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureEquityAndRegulatoryMatters</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>99931303 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>99931403 - Disclosure - Fair Value of Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureFairValueOfFinancialInstrumentsTables</Role>
      <ShortName>Fair Value of Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureFairValueOfFinancialInstruments</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>99931603 - Disclosure - Earnings Per Share ("EPS") (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEarningsPerShareepsTables</Role>
      <ShortName>Earnings Per Share ("EPS") (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureEarningsPerShareeps</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>99931703 - Disclosure - ESOP (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEsopTables</Role>
      <ShortName>ESOP (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureEsop</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>99931803 - Disclosure - Condensed Parent Only Financial Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCondensedParentOnlyFinancialInformationTables</Role>
      <ShortName>Condensed Parent Only Financial Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureCondensedParentOnlyFinancialInformation</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>99940201 - Disclosure - Debt Securities - Debt Securities AFS - AOCI(L) Schedule (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesDebtSecuritiesAfsAociLScheduleDetails</Role>
      <ShortName>Debt Securities - Debt Securities AFS - AOCI(L) Schedule (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>99940202 - Disclosure - Debt Securities - Debt Securities AFS - FV and Unrealized Loss Schedule (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesDebtSecuritiesAfsFvAndUnrealizedLossScheduleDetails</Role>
      <ShortName>Debt Securities - Debt Securities AFS - FV and Unrealized Loss Schedule (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>99940203 - Disclosure - Debt Securities - Debt Securities AFS - By Contractual Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesDebtSecuritiesAfsByContractualMaturityDetails</Role>
      <ShortName>Debt Securities - Debt Securities AFS - By Contractual Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>99940204 - Disclosure - Debt Securities - Debt Securities HTM - Amortized Cost and FV (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesDebtSecuritiesHtmAmortizedCostAndFvDetails</Role>
      <ShortName>Debt Securities - Debt Securities HTM - Amortized Cost and FV (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>99940205 - Disclosure - Debt Securities - Debt Securities HTM - By Contractual Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesDebtSecuritiesHtmByContractualMaturityDetails</Role>
      <ShortName>Debt Securities - Debt Securities HTM - By Contractual Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>99940206 - Disclosure - Debt Securities - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDebtSecuritiesNarrativeDetails</Role>
      <ShortName>Debt Securities - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>99940301 - Disclosure - Loans and Allowance for Credit Losses - By Major Category (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesByMajorCategoryDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - By Major Category (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>99940302 - Disclosure - Loans and Allowance for Credit Losses - Changes in the Allowance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesChangesInAllowanceDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Changes in the Allowance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>99940303 - Disclosure - Loans and Allowance for Credit Losses - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesNarrativeDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>99940304 - Disclosure - Loans and Allowance for Credit Losses - By Risk Rating and Year of Origination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesByRiskRatingAndYearOfOriginationDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - By Risk Rating and Year of Origination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>99940305 - Disclosure - Loans and Allowance for Credit Losses - Loan Aging Schedule (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesLoanAgingScheduleDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Loan Aging Schedule (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>99940306 - Disclosure - Loans and Allowance for Credit Losses - Loans to Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureLoansAndAllowanceForCreditLossesLoansToRelatedPartiesDetails</Role>
      <ShortName>Loans and Allowance for Credit Losses - Loans to Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - Office Properties and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureOfficePropertiesAndEquipmentDetails</Role>
      <ShortName>Office Properties and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureOfficePropertiesAndEquipmentTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>99940501 - Disclosure - Mortgage Servicing Rights - Summary of changes in the balance of mortgage servicing rights (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureMortgageServicingRightsSummaryOfChangesInBalanceOfMortgageServicingRightsDetails</Role>
      <ShortName>Mortgage Servicing Rights - Summary of changes in the balance of mortgage servicing rights (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>99940502 - Disclosure - Mortgage Servicing Rights - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureMortgageServicingRightsNarrativeDetails</Role>
      <ShortName>Mortgage Servicing Rights - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - Deposits - Composition of Deposits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDepositsCompositionOfDepositsDetails</Role>
      <ShortName>Deposits - Composition of Deposits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>99940602 - Disclosure - Deposits - Maturities of Certificates of Deposit (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDepositsMaturitiesOfCertificatesOfDepositDetails</Role>
      <ShortName>Deposits - Maturities of Certificates of Deposit (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>99940701 - Disclosure - Borrowed Funds - Current Schedule (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureBorrowedFundsCurrentScheduleDetails</Role>
      <ShortName>Borrowed Funds - Current Schedule (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>99940702 - Disclosure - Borrowed Funds - Schedule of Maturities of Non-Short Term Borrowed Funds (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureBorrowedFundsScheduleOfMaturitiesOfNonShortTermBorrowedFundsDetails</Role>
      <ShortName>Borrowed Funds - Schedule of Maturities of Non-Short Term Borrowed Funds (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>99940703 - Disclosure - Borrowed Funds - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureBorrowedFundsNarrativeDetails</Role>
      <ShortName>Borrowed Funds - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - Income Taxes - Schedule of components of the provision for income taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureIncomeTaxesScheduleOfComponentsOfProvisionForIncomeTaxesDetails</Role>
      <ShortName>Income Taxes - Schedule of components of the provision for income taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>99940802 - Disclosure - Income Taxes - Disclosure of components of the net deferred tax assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureIncomeTaxesDisclosureOfComponentsOfNetDeferredTaxAssetsDetails</Role>
      <ShortName>Income Taxes - Disclosure of components of the net deferred tax assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>99940803 - Disclosure - Income Taxes - Narratives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureIncomeTaxesNarrativesDetails</Role>
      <ShortName>Income Taxes - Narratives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>99940901 - Disclosure - Employee Benefit Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEmployeeBenefitPlanDetails</Role>
      <ShortName>Employee Benefit Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureEmployeeBenefitPlan</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>99941001 - Disclosure - Deferred Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDeferredCompensationDetails</Role>
      <ShortName>Deferred Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureDeferredCompensation</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>99941101 - Disclosure - Commitments Contingencies and Credit Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCommitmentsContingenciesAndCreditRiskDetails</Role>
      <ShortName>Commitments Contingencies and Credit Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureCommitmentsContingenciesAndCreditRiskTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>99941201 - Disclosure - Equity and Regulatory Matters - Schedule of Capital Amounts and Ratios (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEquityAndRegulatoryMattersScheduleOfCapitalAmountsAndRatiosDetails</Role>
      <ShortName>Equity and Regulatory Matters - Schedule of Capital Amounts and Ratios (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>99941202 - Disclosure - Equity and Regulatory Matters - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEquityAndRegulatoryMattersNarrativeDetails</Role>
      <ShortName>Equity and Regulatory Matters - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>99941301 - Disclosure - Fair Value Measurements - FV of Assets and Liabilities Measured on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureFairValueMeasurementsFvOfAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements - FV of Assets and Liabilities Measured on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>99941401 - Disclosure - Fair Value of Financial Instruments - Carrying Amounts and Estimated FV by FV Hierarchy (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureFairValueOfFinancialInstrumentsCarryingAmountsAndEstimatedFvByFvHierarchyDetails</Role>
      <ShortName>Fair Value of Financial Instruments - Carrying Amounts and Estimated FV by FV Hierarchy (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>99941501 - Disclosure - Derivatives - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureDerivativesNarrativeDetails</Role>
      <ShortName>Derivatives - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>99941601 - Disclosure - Earnings Per Share ("EPS") - Earnings Per Common Share Basic and Diluted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEarningsPerShareepsEarningsPerCommonShareBasicAndDilutedDetails</Role>
      <ShortName>Earnings Per Share ("EPS") - Earnings Per Common Share Basic and Diluted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureEarningsPerShareepsTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>99941602 - Disclosure - Earnings Per Share ("EPS") (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEarningsPerShareepsDetails</Role>
      <ShortName>Earnings Per Share ("EPS") (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.eastwis.com/role/DisclosureEarningsPerShareepsTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>99941701 - Disclosure - ESOP - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEsopNarrativeDetails</Role>
      <ShortName>ESOP - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>99941702 - Disclosure - ESOP - Shares Held (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureEsopSharesHeldDetails</Role>
      <ShortName>ESOP - Shares Held (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>99941801 - Disclosure - Condensed Parent Only Financial Information - Condensed Balance Sheets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCondensedParentOnlyFinancialInformationCondensedBalanceSheetsDetails</Role>
      <ShortName>Condensed Parent Only Financial Information - Condensed Balance Sheets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>99941802 - Disclosure - Condensed Parent Only Financial Information - Condensed Statements of Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCondensedParentOnlyFinancialInformationCondensedStatementsOfOperationsDetails</Role>
      <ShortName>Condensed Parent Only Financial Information - Condensed Statements of Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="ewsb-20241231x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>99941803 - Disclosure - Condensed Parent Only Financial Information - Condensed Statements of Cash Flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.eastwis.com/role/DisclosureCondensedParentOnlyFinancialInformationCondensedStatementsOfCashFlowsDetails</Role>
      <ShortName>Condensed Parent Only Financial Information - Condensed Statements of Cash Flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ewsb-20241231.xsd</File>
    <File>ewsb-20241231_cal.xml</File>
    <File>ewsb-20241231_def.xml</File>
    <File>ewsb-20241231_lab.xml</File>
    <File>ewsb-20241231_pre.xml</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="ewsb-20241231x10k.htm">ewsb-20241231x10k.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>ewsb-20241231x10k003.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="3">http://fasb.org/srt/2024</BaseTaxonomy>
    <BaseTaxonomy items="1508">http://fasb.org/us-gaap/2024</BaseTaxonomy>
    <BaseTaxonomy items="14">http://xbrl.sec.gov/cyd/2024</BaseTaxonomy>
    <BaseTaxonomy items="37">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
