v3.22.4
Document and Entity Information Document
Jan. 26, 2023
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jan. 26, 2023
Entity Registrant Name FIRST FINANCIAL BANCORP.
Entity Incorporation, State or Country Code OH
Entity File Number 001-34762
Entity Tax Identification Number 31-1042001
Entity Address, Address Line One 255 East Fifth Street, Suite 800
Entity Address, City or Town Cincinnati,
Entity Address, State or Province OH
Entity Address, Postal Zip Code 45202
City Area Code 877
Local Phone Number 322-9530
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0000708955
Amendment Flag false
NASDAQ/NMS (GLOBAL MARKET) [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common stock, No par value
Trading Symbol FFBC
Security Exchange Name NASDAQ