v3.22.2.2
Cover Page
Sep. 23, 2022
Cover [Abstract]  
Document Type 8-K
Document Period End Date Sep. 23, 2022
Entity Registrant Name S&T BANCORP, INC
Entity Incorporation, State or Country Code PA
Entity File Number 0-12508
Entity Tax Identification Number 25-1434426
Entity Address, Address Line One 800 Philadelphia Street
Entity Address, City or Town Indiana
Entity Address, State or Province PA
Entity Address, Postal Zip Code 15701
City Area Code 800
Local Phone Number 325-2265
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $2.50 par value
Trading Symbol STBA
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0000719220
Amendment Flag false