<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:fdfbf9a4-733b-4090-af51-e5022d4c07f4,g:b6f4e4cb-dcfe-42da-acb4-dd25ca40325e-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:ffbc="http://www.bankatfirst.com/20240331" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types1="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.bankatfirst.com/20240331">
  <xs:import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2023" schemaLocation="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/exch/2023" schemaLocation="https://xbrl.sec.gov/exch/2023/exch-2023.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ffbc-20240331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ffbc-20240331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ffbc-20240331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ffbc-20240331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="DocumentandEntityInformation" roleURI="http://www.bankatfirst.com/role/DocumentandEntityInformation">
        <link:definition>0000001 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDBALANCESHEETS" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDBALANCESHEETS">
        <link:definition>0000002 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>0000003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFINCOME" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDSTATEMENTSOFINCOME">
        <link:definition>0000004 - Statement - CONSOLIDATED STATEMENTS OF INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME">
        <link:definition>0000005 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY">
        <link:definition>0000006 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYParenthetical">
        <link:definition>0000007 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://www.bankatfirst.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>0000008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationConsolidationandPresentationofFinancialStatements" roleURI="http://www.bankatfirst.com/role/OrganizationConsolidationandPresentationofFinancialStatements">
        <link:definition>0000009 - Disclosure - Organization, Consolidation and Presentation of Financial Statements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RECENTLYADOPTEDANDISSUEDACCOUNTINGSTANDARDS" roleURI="http://www.bankatfirst.com/role/RECENTLYADOPTEDANDISSUEDACCOUNTINGSTANDARDS">
        <link:definition>0000010 - Disclosure - RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVESTMENTS" roleURI="http://www.bankatfirst.com/role/INVESTMENTS">
        <link:definition>0000011 - Disclosure - INVESTMENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASES" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASES">
        <link:definition>0000012 - Disclosure - LOANS AND LEASES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ALLOWANCEFORCREDITLOSSES" roleURI="http://www.bankatfirst.com/role/ALLOWANCEFORCREDITLOSSES">
        <link:definition>0000013 - Disclosure - ALLOWANCE FOR CREDIT LOSSES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDOTHERINTANGIBLEASSETS" roleURI="http://www.bankatfirst.com/role/GOODWILLANDOTHERINTANGIBLEASSETS">
        <link:definition>0000014 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASES" roleURI="http://www.bankatfirst.com/role/LEASES">
        <link:definition>0000015 - Disclosure - LEASES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OPERATINGLEASES" roleURI="http://www.bankatfirst.com/role/OPERATINGLEASES">
        <link:definition>0000016 - Disclosure - OPERATING LEASES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BORROWINGS" roleURI="http://www.bankatfirst.com/role/BORROWINGS">
        <link:definition>0000017 - Disclosure - BORROWINGS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSS" roleURI="http://www.bankatfirst.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSS">
        <link:definition>0000018 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVES" roleURI="http://www.bankatfirst.com/role/DERIVATIVES">
        <link:definition>0000019 - Disclosure - DERIVATIVES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIES" roleURI="http://www.bankatfirst.com/role/COMMITMENTSANDCONTINGENCIES">
        <link:definition>0000020 - Disclosure - COMMITMENTS AND CONTINGENCIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXES" roleURI="http://www.bankatfirst.com/role/INCOMETAXES">
        <link:definition>0000021 - Disclosure - INCOME TAXES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANS" roleURI="http://www.bankatfirst.com/role/EMPLOYEEBENEFITPLANS">
        <link:definition>0000022 - Disclosure - EMPLOYEE BENEFIT PLANS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUERECOGNITION" roleURI="http://www.bankatfirst.com/role/REVENUERECOGNITION">
        <link:definition>0000023 - Disclosure - REVENUE RECOGNITION</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERCOMMONSHARE" roleURI="http://www.bankatfirst.com/role/EARNINGSPERCOMMONSHARE">
        <link:definition>0000024 - Disclosure - EARNINGS PER COMMON SHARE</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEDISCLOSURES" roleURI="http://www.bankatfirst.com/role/FAIRVALUEDISCLOSURES">
        <link:definition>0000025 - Disclosure - FAIR VALUE DISCLOSURES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONS" roleURI="http://www.bankatfirst.com/role/BUSINESSCOMBINATIONS">
        <link:definition>0000026 - Disclosure - BUSINESS COMBINATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationConsolidationandPresentationofFinancialStatementsPolicies" roleURI="http://www.bankatfirst.com/role/OrganizationConsolidationandPresentationofFinancialStatementsPolicies">
        <link:definition>9954471 - Disclosure - Organization, Consolidation and Presentation of Financial Statements (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReceivablesLoansNotesReceivableandOthersPolicies" roleURI="http://www.bankatfirst.com/role/ReceivablesLoansNotesReceivableandOthersPolicies">
        <link:definition>9954472 - Disclosure - Receivables, Loans, Notes Receivable, and Others (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstrumentsandHedgingActivitiesPolicies" roleURI="http://www.bankatfirst.com/role/DerivativeInstrumentsandHedgingActivitiesPolicies">
        <link:definition>9954473 - Disclosure - Derivative Instruments and Hedging Activities (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVESTMENTSTables" roleURI="http://www.bankatfirst.com/role/INVESTMENTSTables">
        <link:definition>9954474 - Disclosure - INVESTMENTS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESTables" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESTables">
        <link:definition>9954475 - Disclosure - LOANS AND LEASES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ALLOWANCEFORCREDITLOSSESTables" roleURI="http://www.bankatfirst.com/role/ALLOWANCEFORCREDITLOSSESTables">
        <link:definition>9954476 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLTables" roleURI="http://www.bankatfirst.com/role/GOODWILLTables">
        <link:definition>9954477 - Disclosure - GOODWILL (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESTables" roleURI="http://www.bankatfirst.com/role/LEASESTables">
        <link:definition>9954478 - Disclosure - LEASES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OPERATINGLEASESTables" roleURI="http://www.bankatfirst.com/role/OPERATINGLEASESTables">
        <link:definition>9954479 - Disclosure - OPERATING LEASES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BORROWINGSTables" roleURI="http://www.bankatfirst.com/role/BORROWINGSTables">
        <link:definition>9954480 - Disclosure - BORROWINGS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSTables" roleURI="http://www.bankatfirst.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSTables">
        <link:definition>9954481 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVESTables" roleURI="http://www.bankatfirst.com/role/DERIVATIVESTables">
        <link:definition>9954482 - Disclosure - DERIVATIVES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIESTables" roleURI="http://www.bankatfirst.com/role/COMMITMENTSANDCONTINGENCIESTables">
        <link:definition>9954483 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSTables" roleURI="http://www.bankatfirst.com/role/EMPLOYEEBENEFITPLANSTables">
        <link:definition>9954484 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUERECOGNITIONREVENUERECOGNITIONTables" roleURI="http://www.bankatfirst.com/role/REVENUERECOGNITIONREVENUERECOGNITIONTables">
        <link:definition>9954485 - Disclosure - REVENUE RECOGNITION REVENUE RECOGNITION (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERCOMMONSHARETables" roleURI="http://www.bankatfirst.com/role/EARNINGSPERCOMMONSHARETables">
        <link:definition>9954486 - Disclosure - EARNINGS PER COMMON SHARE (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEDISCLOSURESTables" roleURI="http://www.bankatfirst.com/role/FAIRVALUEDISCLOSURESTables">
        <link:definition>9954487 - Disclosure - FAIR VALUE DISCLOSURES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONSTables" roleURI="http://www.bankatfirst.com/role/BUSINESSCOMBINATIONSTables">
        <link:definition>9954488 - Disclosure - BUSINESS COMBINATIONS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RECENTLYADOPTEDANDISSUEDACCOUNTINGSTANDARDSDetails" roleURI="http://www.bankatfirst.com/role/RECENTLYADOPTEDANDISSUEDACCOUNTINGSTANDARDSDetails">
        <link:definition>9954489 - Disclosure - RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVESTMENTSAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/INVESTMENTSAdditionalInformationDetails">
        <link:definition>9954490 - Disclosure - INVESTMENTS - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVESTMENTSSummaryofHeldToMaturityandAvailableForSaleInvestmentSecuritiesDetails" roleURI="http://www.bankatfirst.com/role/INVESTMENTSSummaryofHeldToMaturityandAvailableForSaleInvestmentSecuritiesDetails">
        <link:definition>9954491 - Disclosure - INVESTMENTS - Summary of Held-To-Maturity and Available-For-Sale Investment Securities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVESTMENTSSummaryofInvestmentSecuritiesbyEstimatedMaturityDetails" roleURI="http://www.bankatfirst.com/role/INVESTMENTSSummaryofInvestmentSecuritiesbyEstimatedMaturityDetails">
        <link:definition>9954492 - Disclosure - INVESTMENTS - Summary of Investment Securities by Estimated Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVESTMENTSAgeofGrossUnrealizedLossesandAssociatedFairValuebyInvestmentCategoryDetails" roleURI="http://www.bankatfirst.com/role/INVESTMENTSAgeofGrossUnrealizedLossesandAssociatedFairValuebyInvestmentCategoryDetails">
        <link:definition>9954493 - Disclosure - INVESTMENTS - Age of Gross Unrealized Losses and Associated Fair Value by Investment Category (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESAdditionalInformationDetails">
        <link:definition>9954494 - Disclosure - LOANS AND LEASES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESCommercialandConsumerCreditExposurebyRiskAttributeDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESCommercialandConsumerCreditExposurebyRiskAttributeDetails">
        <link:definition>9954495 - Disclosure - LOANS AND LEASES - Commercial and Consumer Credit Exposure by Risk Attribute (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESLoanDelinquencyincludingNonaccrualLoansDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESLoanDelinquencyincludingNonaccrualLoansDetails">
        <link:definition>9954496 - Disclosure - LOANS AND LEASES - Loan Delinquency, including Nonaccrual Loans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESFinancialDifficultyModificationsDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESFinancialDifficultyModificationsDetails">
        <link:definition>9954497 - Disclosure - LOANS AND LEASES - Financial Difficulty Modifications (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESFinancialDifficultyModificationsPaymentStatusDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESFinancialDifficultyModificationsPaymentStatusDetails">
        <link:definition>9954498 - Disclosure - LOANS AND LEASES - Financial Difficulty Modifications, Payment Status (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESNonaccrualLoansDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESNonaccrualLoansDetails">
        <link:definition>9954499 - Disclosure - LOANS AND LEASES - Nonaccrual Loans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESCollateralDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESCollateralDetails">
        <link:definition>9954500 - Disclosure - LOANS AND LEASES - Collateral (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESLeasingDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESLeasingDetails">
        <link:definition>9954501 - Disclosure - LOANS AND LEASES - Leasing (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESLeasingMaturityDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESLeasingMaturityDetails">
        <link:definition>9954502 - Disclosure - LOANS AND LEASES - Leasing Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LOANSANDLEASESChangesinOtherRealEstateOwnedDetails" roleURI="http://www.bankatfirst.com/role/LOANSANDLEASESChangesinOtherRealEstateOwnedDetails">
        <link:definition>9954503 - Disclosure - LOANS AND LEASES - Changes in Other Real Estate Owned (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ALLOWANCEFORCREDITLOSSESChangesintheAllowanceforCreditLossesDetails" roleURI="http://www.bankatfirst.com/role/ALLOWANCEFORCREDITLOSSESChangesintheAllowanceforCreditLossesDetails">
        <link:definition>9954504 - Disclosure - ALLOWANCE FOR CREDIT LOSSES - Changes in the Allowance for Credit Losses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ALLOWANCEFORCREDITLOSSESAdditionalinformationDetails" roleURI="http://www.bankatfirst.com/role/ALLOWANCEFORCREDITLOSSESAdditionalinformationDetails">
        <link:definition>9954505 - Disclosure - ALLOWANCE FOR CREDIT LOSSES- Additional information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDOTHERINTANGIBLEASSETSScheduleofGoodwillDetails" roleURI="http://www.bankatfirst.com/role/GOODWILLANDOTHERINTANGIBLEASSETSScheduleofGoodwillDetails">
        <link:definition>9954506 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS--Schedule of Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDOTHERINTANGIBLEASSETSAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/GOODWILLANDOTHERINTANGIBLEASSETSAdditionalInformationDetails">
        <link:definition>9954507 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS--Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GOODWILLANDOTHERINTANGIBLEASSETSScheduleofOtherIntangiblesDetails" roleURI="http://www.bankatfirst.com/role/GOODWILLANDOTHERINTANGIBLEASSETSScheduleofOtherIntangiblesDetails">
        <link:definition>9954508 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS--Schedule of Other Intangibles (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/LEASESAdditionalInformationDetails">
        <link:definition>9954509 - Disclosure - LEASES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESLeaseCostDetails" roleURI="http://www.bankatfirst.com/role/LEASESLeaseCostDetails">
        <link:definition>9954510 - Disclosure - LEASES - Lease Cost (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESLeaseMaturityDetails" roleURI="http://www.bankatfirst.com/role/LEASESLeaseMaturityDetails">
        <link:definition>9954511 - Disclosure - LEASES - Lease Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESScheduleofsupplementalbalancesheetinformationrelatedtoassetsDetails" roleURI="http://www.bankatfirst.com/role/LEASESScheduleofsupplementalbalancesheetinformationrelatedtoassetsDetails">
        <link:definition>9954512 - Disclosure - LEASES - Schedule of supplemental balance sheet information related to assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LEASESSupplementalcashflowinformationrelatedtoleasesDetails" roleURI="http://www.bankatfirst.com/role/LEASESSupplementalcashflowinformationrelatedtoleasesDetails">
        <link:definition>9954513 - Disclosure - LEASES - Supplemental cash flow information related to leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OPERATINGLEASESAdditionalinformationDetails" roleURI="http://www.bankatfirst.com/role/OPERATINGLEASESAdditionalinformationDetails">
        <link:definition>9954514 - Disclosure - OPERATING LEASES - Additional information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OPERATINGLEASESMaturityTableDetails" roleURI="http://www.bankatfirst.com/role/OPERATINGLEASESMaturityTableDetails">
        <link:definition>9954515 - Disclosure - OPERATING LEASES - Maturity Table (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BORROWINGSScheduleofShorttermDebtDetails" roleURI="http://www.bankatfirst.com/role/BORROWINGSScheduleofShorttermDebtDetails">
        <link:definition>9954516 - Disclosure - BORROWINGS - Schedule of Short-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BORROWINGSScheduleofLongtermDebtDetails" roleURI="http://www.bankatfirst.com/role/BORROWINGSScheduleofLongtermDebtDetails">
        <link:definition>9954517 - Disclosure - BORROWINGS - Schedule of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BORROWINGSBorrowingsAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/BORROWINGSBorrowingsAdditionalInformationDetails">
        <link:definition>9954518 - Disclosure - BORROWINGS Borrowings - - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSDetails" roleURI="http://www.bankatfirst.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSDetails">
        <link:definition>9954519 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AMOUNTRECLASSIFIEDFROMACCUMULATEDOTHERCOMPREHENSIVEINCOMEDetails" roleURI="http://www.bankatfirst.com/role/AMOUNTRECLASSIFIEDFROMACCUMULATEDOTHERCOMPREHENSIVEINCOMEDetails">
        <link:definition>9954520 - Disclosure - AMOUNT RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVESAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/DERIVATIVESAdditionalInformationDetails">
        <link:definition>9954521 - Disclosure - DERIVATIVES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVESCashFlowHedgingRelationshipsDetails" roleURI="http://www.bankatfirst.com/role/DERIVATIVESCashFlowHedgingRelationshipsDetails">
        <link:definition>9954522 - Disclosure - DERIVATIVES Cash Flow Hedging Relationships (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVESSummaryofDerivativeFinancialInstrumentsandBalancesDetails" roleURI="http://www.bankatfirst.com/role/DERIVATIVESSummaryofDerivativeFinancialInstrumentsandBalancesDetails">
        <link:definition>9954523 - Disclosure - DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVESDisclosurebyTypeofFinancialInstrumentDetails" roleURI="http://www.bankatfirst.com/role/DERIVATIVESDisclosurebyTypeofFinancialInstrumentDetails">
        <link:definition>9954524 - Disclosure - DERIVATIVES - Disclosure by Type of Financial Instrument (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DERIVATIVESDerivativeFinancialInstrumentsAverageRemainingMaturityandtheWeightedAverageInterestRatesbeingPaidandReceivedDetails" roleURI="http://www.bankatfirst.com/role/DERIVATIVESDerivativeFinancialInstrumentsAverageRemainingMaturityandtheWeightedAverageInterestRatesbeingPaidandReceivedDetails">
        <link:definition>9954525 - Disclosure - DERIVATIVES - Derivative Financial Instruments, Average Remaining Maturity and the Weighted-Average Interest Rates being Paid and Received (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIESLoanandUnfundedCommitmentsDetails" roleURI="http://www.bankatfirst.com/role/COMMITMENTSANDCONTINGENCIESLoanandUnfundedCommitmentsDetails">
        <link:definition>9954526 - Disclosure - COMMITMENTS AND CONTINGENCIES - Loan and Unfunded Commitments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIESInvestmentholdingsscheduleDetails" roleURI="http://www.bankatfirst.com/role/COMMITMENTSANDCONTINGENCIESInvestmentholdingsscheduleDetails">
        <link:definition>9954527 - Disclosure - COMMITMENTS AND CONTINGENCIES - Investment holdings schedule (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIESAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetails">
        <link:definition>9954528 - Disclosure - COMMITMENTS AND CONTINGENCIES - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESDetails" roleURI="http://www.bankatfirst.com/role/INCOMETAXESDetails">
        <link:definition>9954529 - Disclosure - INCOME TAXES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/EMPLOYEEBENEFITPLANSAdditionalInformationDetails">
        <link:definition>9954530 - Disclosure - EMPLOYEE BENEFIT PLANS - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EMPLOYEEBENEFITPLANSEmployeebenefitplanamountsrecognizedintheConsolidatedBalanceSheetsandConsolidatedStatementsofIncomeDetails" roleURI="http://www.bankatfirst.com/role/EMPLOYEEBENEFITPLANSEmployeebenefitplanamountsrecognizedintheConsolidatedBalanceSheetsandConsolidatedStatementsofIncomeDetails">
        <link:definition>9954531 - Disclosure - EMPLOYEE BENEFIT PLANS - Employee benefit plan amounts recognized in the Consolidated Balance Sheets and Consolidated Statements of Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="REVENUERECOGNITIONDetails" roleURI="http://www.bankatfirst.com/role/REVENUERECOGNITIONDetails">
        <link:definition>9954532 - Disclosure - REVENUE RECOGNITION (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERCOMMONSHAREComputationofBasicandDilutedEarningsPerShareDetails" roleURI="http://www.bankatfirst.com/role/EARNINGSPERCOMMONSHAREComputationofBasicandDilutedEarningsPerShareDetails">
        <link:definition>9954533 - Disclosure - EARNINGS PER COMMON SHARE - Computation of Basic and Diluted Earnings Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERCOMMONSHAREAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/EARNINGSPERCOMMONSHAREAdditionalInformationDetails">
        <link:definition>9954534 - Disclosure - EARNINGS PER COMMON SHARE - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEDISCLOSURESEstimatedFairValuesofFinancialInstrumentsDetails" roleURI="http://www.bankatfirst.com/role/FAIRVALUEDISCLOSURESEstimatedFairValuesofFinancialInstrumentsDetails">
        <link:definition>9954535 - Disclosure - FAIR VALUE DISCLOSURES - Estimated Fair Values of Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEDISCLOSURESSummaryofFinancialAssetsandLiabilitiesMeasureatFairValueonaRecurringBasisDetails" roleURI="http://www.bankatfirst.com/role/FAIRVALUEDISCLOSURESSummaryofFinancialAssetsandLiabilitiesMeasureatFairValueonaRecurringBasisDetails">
        <link:definition>9954536 - Disclosure - FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measure at Fair Value on a Recurring Basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEDISCLOSURESReconciliationofGainsandLossesonLevel3AssetsDetails" roleURI="http://www.bankatfirst.com/role/FAIRVALUEDISCLOSURESReconciliationofGainsandLossesonLevel3AssetsDetails">
        <link:definition>9954537 - Disclosure - FAIR VALUE DISCLOSURES - Reconciliation of Gains and Losses on Level 3 Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEDISCLOSURESSummaryofFinancialAssetsandLiabilitiesMeasuredatFairValueonaNonrecurringBasisDetails" roleURI="http://www.bankatfirst.com/role/FAIRVALUEDISCLOSURESSummaryofFinancialAssetsandLiabilitiesMeasuredatFairValueonaNonrecurringBasisDetails">
        <link:definition>9954538 - Disclosure - FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONAdditionalInformationDetails" roleURI="http://www.bankatfirst.com/role/BUSINESSCOMBINATIONAdditionalInformationDetails">
        <link:definition>9954539 - Disclosure - BUSINESS COMBINATION - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONSDetails" roleURI="http://www.bankatfirst.com/role/BUSINESSCOMBINATIONSDetails">
        <link:definition>9954540 - Disclosure - BUSINESS COMBINATIONS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSCOMBINATIONBusinessAcquisitionProFormaInformationDetails" roleURI="http://www.bankatfirst.com/role/BUSINESSCOMBINATIONBusinessAcquisitionProFormaInformationDetails">
        <link:definition>9954541 - Disclosure - BUSINESS COMBINATION Business Acquisition, Pro Forma Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="ffbc_FinancingReceivableRestructuredLoansNotConsideredTDRsWeightedAverageTermExtension" abstract="false" name="FinancingReceivableRestructuredLoansNotConsideredTDRsWeightedAverageTermExtension" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_DerivativeLiabilityFairValueOfCollateralNetOfRestrictedCash" abstract="false" name="DerivativeLiabilityFairValueOfCollateralNetOfRestrictedCash" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_NumeratorForBasicAndDilutedEarningsPerShareIncomeAvailableToCommonShareholders" abstract="true" name="NumeratorForBasicAndDilutedEarningsPerShareIncomeAvailableToCommonShareholders" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_SpotForeignExchangeIncome" abstract="false" name="SpotForeignExchangeIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_ConsolidatedStatementsOfChangesInStockholdersEquityParentheticalsAbstract" abstract="true" name="ConsolidatedStatementsOfChangesInStockholdersEquityParentheticalsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_NewMarketsTaxCreditMember" abstract="true" name="NewMarketsTaxCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_NumberOfSecuritiesInSecurityPortfolio" abstract="false" name="NumberOfSecuritiesInSecurityPortfolio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ffbc_Subordinateddebtoriginalissue" abstract="false" name="Subordinateddebtoriginalissue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_OneYearOrLessMember" abstract="true" name="OneYearOrLessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsInCurrentFiscalYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsInCurrentFiscalYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_FinancingReceivableRestructuredLoansNotConsideredTDRsWeightedAverageInterestRateReduction" abstract="false" name="FinancingReceivableRestructuredLoansNotConsideredTDRsWeightedAverageInterestRateReduction" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ffbc_SummitFundingGroupMember" abstract="true" name="SummitFundingGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_RestructuredLoansLoanRelationshipsReviewThresholdAmountMinimum" abstract="false" name="RestructuredLoansLoanRelationshipsReviewThresholdAmountMinimum" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_InvestmentsUnrealizedLossPositionTable" abstract="true" name="InvestmentsUnrealizedLossPositionTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_DebtInstrumentMaturityPeriod" abstract="false" name="DebtInstrumentMaturityPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ffbc_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" abstract="true" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_AverageRateAbstract" abstract="true" name="AverageRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_DisclosureByTypeOfFinancialInstrumentTableTextBlock" abstract="false" name="DisclosureByTypeOfFinancialInstrumentTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_FinancingReceivableNonaccrualWithAllowance" abstract="false" name="FinancingReceivableNonaccrualWithAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_PrincipalAmountOfCommercialAndCommercialRealEstateLoans" abstract="false" name="PrincipalAmountOfCommercialAndCommercialRealEstateLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_TermExtensionAndInterestRateReductionMember" abstract="true" name="TermExtensionAndInterestRateReductionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsThreeYearsBeforeLatestFiscalYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsThreeYearsBeforeLatestFiscalYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_CommercialRealEstateOwnerPortfolioSegmentDomain" abstract="true" name="CommercialRealEstateOwnerPortfolioSegmentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsFourYearsBeforeLatestFiscalYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsFourYearsBeforeLatestFiscalYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_DerivativeFinancialInstrumentsReceiveVariablePayFixedMember" abstract="true" name="DerivativeFinancialInstrumentsReceiveVariablePayFixedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsByOriginationYearIncludingRevolving" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsByOriginationYearIncludingRevolving" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_LoanCommitmentsFixedRateMaturitiesMaximum" abstract="false" name="LoanCommitmentsFixedRateMaturitiesMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ffbc_EarningsPerShareDisclosureTable" abstract="true" name="EarningsPerShareDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_NumberOfDerivativeCounterparty" abstract="false" name="NumberOfDerivativeCounterparty" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ffbc_DebtInstrumentMinimumCallablePeriod" abstract="false" name="DebtInstrumentMinimumCallablePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ffbc_HistoricTaxCreditEquityMember" abstract="true" name="HistoricTaxCreditEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_ImpairedCommercialAndCommercialRealEstateLoansMemberMember" abstract="true" name="ImpairedCommercialAndCommercialRealEstateLoansMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_ScheduleOfOtherRealEstateOwnedTableTextBlock" abstract="false" name="ScheduleOfOtherRealEstateOwnedTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_Scheduleofsupplementalbalancesheetinformationrelatedtoleases.TableTextBlock" abstract="false" name="Scheduleofsupplementalbalancesheetinformationrelatedtoleases.TableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_AccumulatedOtherComprehensiveIncomeReclassificationTotalBeforeTax" abstract="false" name="AccumulatedOtherComprehensiveIncomeReclassificationTotalBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_OtherAccumulatedComprehensiveIncomeReclassifiedFromAociTableTextBlock" abstract="false" name="OtherAccumulatedComprehensiveIncomeReclassifiedFromAociTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_OtherRealEstateOwnedMember" abstract="true" name="OtherRealEstateOwnedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_ServiceChargesonDepositAccounts" abstract="false" name="ServiceChargesonDepositAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_InvestmentsUnrealizedLossPositionLineItems" abstract="true" name="InvestmentsUnrealizedLossPositionLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_BannockburnMember" abstract="true" name="BannockburnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_LoanCommitmentsFixedInterestRateRangeMinimum" abstract="false" name="LoanCommitmentsFixedInterestRateRangeMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ffbc_OperatingLeaseMember" abstract="true" name="OperatingLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_CommitmentsAndContingenciesDisclosureTable" abstract="true" name="CommitmentsAndContingenciesDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_OtherComprehensiveIncomeLossBeforeReclassificationAdjustmentsAndTaxAbstract" abstract="true" name="OtherComprehensiveIncomeLossBeforeReclassificationAdjustmentsAndTaxAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_ScheduleofCollateralDependentLoansTableTextBlock" abstract="false" name="ScheduleofCollateralDependentLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_CommitmentsAndContingenciesDisclosureLineItems" abstract="true" name="CommitmentsAndContingenciesDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsInFiscalYearBeforeLatestFiscalYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsInFiscalYearBeforeLatestFiscalYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsInFiveOrMoreYearsBeforeLatestFiscalYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsInFiveOrMoreYearsBeforeLatestFiscalYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_TotalCollateralMember" abstract="true" name="TotalCollateralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_AfterFiveYearsThroughTenYearsMember" abstract="true" name="AfterFiveYearsThroughTenYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_AgilePremiumFinanceMember" abstract="true" name="AgilePremiumFinanceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ffbc_CommercialRealEstateOwnerMember" abstract="true" name="CommercialRealEstateOwnerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_NetChangeInOperatingLeases" abstract="false" name="NetChangeInOperatingLeases" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsNetOfPurchaseConsideration" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsNetOfPurchaseConsideration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTaxNetOfReclassificationAdjustments" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTaxNetOfReclassificationAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_NumberOfSecuritiesInUnrealizedLossPosition" abstract="false" name="NumberOfSecuritiesInUnrealizedLossPosition" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsTwoYearsBeforeLatestFiscalYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsTwoYearsBeforeLatestFiscalYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_LoanCommitmentsFixedInterestRateRangeMaximum" abstract="false" name="LoanCommitmentsFixedInterestRateRangeMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ffbc_OtherComprehensiveIncomeLossReclassificationsBeforeTaxAbstract" abstract="true" name="OtherComprehensiveIncomeLossReclassificationsBeforeTaxAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_FinancialReceivablesFinancialDifficultyModifications" abstract="false" name="FinancialReceivablesFinancialDifficultyModifications" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_InvestmentsClassifiedByContractualMaturityDateLineItems" abstract="true" name="InvestmentsClassifiedByContractualMaturityDateLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_CommercialRealEstateInvestorMember" abstract="true" name="CommercialRealEstateInvestorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_FinanceReceivablePercentageOfClassOfLoansAndLeases" abstract="false" name="FinanceReceivablePercentageOfClassOfLoansAndLeases" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ffbc_BradyWareCorporateFinanceMember" abstract="true" name="BradyWareCorporateFinanceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ffbc_OtherComprehensiveIncomeLossReclassificationForeignCurrencyTransaction" abstract="false" name="OtherComprehensiveIncomeLossReclassificationForeignCurrencyTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsRevolving" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsRevolving" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_ComponentsOfLeaseInvestmentsTableTextBlock" abstract="false" name="ComponentsOfLeaseInvestmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_Creditcardexpense" abstract="false" name="Creditcardexpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_ScheduleofsupplementalcashflowinformationrelatedtoleasesTableTextBlock" abstract="false" name="ScheduleofsupplementalcashflowinformationrelatedtoleasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ffbc_Foreignexchangeincome" abstract="false" name="Foreignexchangeincome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_AfterOneYearThroughFiveYearsMember" abstract="true" name="AfterOneYearThroughFiveYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_MatchedInterestRateSwapsMember" abstract="true" name="MatchedInterestRateSwapsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_HistoricTaxCreditPAMMember" abstract="true" name="HistoricTaxCreditPAMMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ffbc_LoanCommitmentsFixedRateMaturitiesMinimum" abstract="false" name="LoanCommitmentsFixedRateMaturitiesMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ffbc_OtherComprehensiveIncomeReclassificationAmortizationOfDefinedBenefitPlansItemsPreTax" abstract="false" name="OtherComprehensiveIncomeReclassificationAmortizationOfDefinedBenefitPlansItemsPreTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_AfterTenYearsMember" abstract="true" name="AfterTenYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_Interchangeincome" abstract="false" name="Interchangeincome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_DerivativeFinancialInstrumentsReceiveFixedPayVariableMember" abstract="true" name="DerivativeFinancialInstrumentsReceiveFixedPayVariableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_LowIncomeHousingTaxCreditsMember" abstract="true" name="LowIncomeHousingTaxCreditsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_Reservesforunfundedcommitments" abstract="false" name="Reservesforunfundedcommitments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_EarningsPerShareDisclosureLineItems" abstract="true" name="EarningsPerShareDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ffbc_FinancialDifficultyModificationMember" abstract="true" name="FinancialDifficultyModificationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ffbc_FinancingReceivableAllowanceForCreditLossesWriteOffsByOriginationYear" abstract="false" name="FinancingReceivableAllowanceForCreditLossesWriteOffsByOriginationYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_FeesAndCommissionsBankcards" abstract="false" name="FeesAndCommissionsBankcards" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ffbc_OtherNotesPayableInterestRate" abstract="false" name="OtherNotesPayableInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
</xs:schema>
