v3.26.1
Document and Entity Information
Jul. 01, 2026
Cover [Abstract]  
Entity Registrant Name PROSPERITY BANCSHARES INC
Security Exchange Name NYSE
Amendment Flag false
Entity Central Index Key 0001068851
Document Type 8-K
Document Period End Date Jul. 01, 2026
Entity Incorporation State Country Code TX
Entity File Number 001-35388
Entity Tax Identification Number 74-2331986
Entity Address, Address Line One 4295 San Felipe
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77027
City Area Code (281)
Local Phone Number 269-7199
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, par value $1.00 per share
Trading Symbol PB
Entity Emerging Growth Company false