v3.25.2
Cover
Jun. 12, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 12, 2025
Entity File Number 001-38280
Entity Registrant Name Stellar Bancorp, Inc.
Entity Central Index Key 0001473844
Entity Tax Identification Number 20-8339782
Entity Incorporation, State or Country Code TX
Entity Address, Address Line One 9 Greenway Plaza,
Entity Address, Address Line Two Suite 110
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77046
City Area Code 713
Local Phone Number 210-7600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock, par value $0.01 per share
Trading Symbol STEL
Security Exchange Name NYSE
Entity Emerging Growth Company false