    <SEC-DOCUMENT>0000708955-24-000043-index.html : 20240725
    <SEC-HEADER>0000708955-24-000043.hdr.sgml : 20240725
    <ACCEPTANCE-DATETIME>20240725161817
    ACCESSION NUMBER:		0000708955-24-000043
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		50
    CONFORMED PERIOD OF REPORT:	20240725
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20240725
    DATE AS OF CHANGE:		20240725

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FIRST FINANCIAL BANCORP /OH/
    		CENTRAL INDEX KEY:			0000708955
    		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
    		ORGANIZATION NAME:           	02 Finance
    		IRS NUMBER:				311042001
    		STATE OF INCORPORATION:			OH
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34762
    		FILM NUMBER:		241142308

    	BUSINESS ADDRESS:
    		STREET 1:		255 EAST FIFTH STREET
    		STREET 2:		SUITE 800
    		CITY:			CINCINNATI
    		STATE:			OH
    		ZIP:			45202
    		BUSINESS PHONE:		8773229530

    	MAIL ADDRESS:
    		STREET 1:		255 EAST FIFTH STREET
    		STREET 2:		SUITE 800
    		CITY:			CINCINNATI
    		STATE:			OH
    		ZIP:			45202
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>ffbc-20240725.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: ffbc-20240725.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a8k2q24earningsreleaseex991.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: a8k2q24earningsreleaseex991.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>exh992earningsrelease2q2.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: exh992earningsrelease2q2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>ffbc-20240725.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 4 - file: ffbc-20240725.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>5
    <FILENAME>ffbc-20240725_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: ffbc-20240725_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>ffbc-20240725_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: ffbc-20240725_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>ffbc-20240725_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 7 - file: ffbc-20240725_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>bancorplogoa04.jpg
    <TEXT>
    Document 8 - file: bancorplogoa04.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>contentsheader0215a23.jpg
    <TEXT>
    Document 9 - file: contentsheader0215a23.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>exh992earningsrelease2q2001.jpg
    <TEXT>
    Document 10 - file: exh992earningsrelease2q2001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>exh992earningsrelease2q2002.jpg
    <TEXT>
    Document 11 - file: exh992earningsrelease2q2002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>exh992earningsrelease2q2003.jpg
    <TEXT>
    Document 12 - file: exh992earningsrelease2q2003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>exh992earningsrelease2q2004.jpg
    <TEXT>
    Document 13 - file: exh992earningsrelease2q2004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>exh992earningsrelease2q2005.jpg
    <TEXT>
    Document 14 - file: exh992earningsrelease2q2005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>exh992earningsrelease2q2006.jpg
    <TEXT>
    Document 15 - file: exh992earningsrelease2q2006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>exh992earningsrelease2q2007.jpg
    <TEXT>
    Document 16 - file: exh992earningsrelease2q2007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>exh992earningsrelease2q2008.jpg
    <TEXT>
    Document 17 - file: exh992earningsrelease2q2008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>exh992earningsrelease2q2009.jpg
    <TEXT>
    Document 18 - file: exh992earningsrelease2q2009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>exh992earningsrelease2q2010.jpg
    <TEXT>
    Document 19 - file: exh992earningsrelease2q2010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>exh992earningsrelease2q2011.jpg
    <TEXT>
    Document 20 - file: exh992earningsrelease2q2011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>exh992earningsrelease2q2012.jpg
    <TEXT>
    Document 21 - file: exh992earningsrelease2q2012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>exh992earningsrelease2q2013.jpg
    <TEXT>
    Document 22 - file: exh992earningsrelease2q2013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>exh992earningsrelease2q2014.jpg
    <TEXT>
    Document 23 - file: exh992earningsrelease2q2014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>exh992earningsrelease2q2015.jpg
    <TEXT>
    Document 24 - file: exh992earningsrelease2q2015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>exh992earningsrelease2q2016.jpg
    <TEXT>
    Document 25 - file: exh992earningsrelease2q2016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>exh992earningsrelease2q2017.jpg
    <TEXT>
    Document 26 - file: exh992earningsrelease2q2017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>exh992earningsrelease2q2018.jpg
    <TEXT>
    Document 27 - file: exh992earningsrelease2q2018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>exh992earningsrelease2q2019.jpg
    <TEXT>
    Document 28 - file: exh992earningsrelease2q2019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>exh992earningsrelease2q2020.jpg
    <TEXT>
    Document 29 - file: exh992earningsrelease2q2020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>exh992earningsrelease2q2021.jpg
    <TEXT>
    Document 30 - file: exh992earningsrelease2q2021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>exh992earningsrelease2q2022.jpg
    <TEXT>
    Document 31 - file: exh992earningsrelease2q2022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>exh992earningsrelease2q2023.jpg
    <TEXT>
    Document 32 - file: exh992earningsrelease2q2023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>exh992earningsrelease2q2024.jpg
    <TEXT>
    Document 33 - file: exh992earningsrelease2q2024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>exh992earningsrelease2q2025.jpg
    <TEXT>
    Document 34 - file: exh992earningsrelease2q2025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>exh992earningsrelease2q2026.jpg
    <TEXT>
    Document 35 - file: exh992earningsrelease2q2026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>exh992earningsrelease2q2027.jpg
    <TEXT>
    Document 36 - file: exh992earningsrelease2q2027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>exh992earningsrelease2q2028.jpg
    <TEXT>
    Document 37 - file: exh992earningsrelease2q2028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>exh992earningsrelease2q2029.jpg
    <TEXT>
    Document 38 - file: exh992earningsrelease2q2029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>exh992earningsrelease2q2030.jpg
    <TEXT>
    Document 39 - file: exh992earningsrelease2q2030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>exh992earningsrelease2q2031.jpg
    <TEXT>
    Document 40 - file: exh992earningsrelease2q2031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>yellowbara12.jpg
    <TEXT>
    Document 41 - file: yellowbara12.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>43
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 43 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>44
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 44 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>45
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 45 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>46
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>48
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: FilingSummary.html

    Document 48 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>50
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>51
    <FILENAME>0000708955-24-000043-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 51 - file: 0000708955-24-000043-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>52
    <FILENAME>ffbc-20240725_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 52 - file: ffbc-20240725_htm.html

    Document 52 - RAW XML: ffbc-20240725_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>