XML 19 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 21, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 000-22507    
Entity Registrant Name THE FIRST BANCSHARES, INC.    
Entity Incorporation, State or Country Code MS    
Entity Tax Identification Number 64-0862173    
Entity Address, Address Line One 6480 U.S. Hwy. 98 West, Suite A    
Entity Address, City or Town Hattiesburg    
Entity Address, State or Province MS    
Entity Address, Postal Zip Code 39402    
City Area Code 601    
Local Phone Number 268-8998    
Title of 12(b) Security Common Stock    
Trading Symbol FBMS    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 782.9
Entity Common Stock, Shares Outstanding   31,251,167  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Certain portions of the Registrant’s proxy statement to be filed for the Annual Meeting of Shareholders to be held June 12, 2025 are incorporated by reference into Part III of this Annual Report on Form 10-K. Other than those portions of the proxy statement specifically incorporated by reference pursuant to Items 10-14 of Part III hereof, no other portions of the proxy statement shall be deemed so incorporated.
    
Entity Central Index Key 0000947559    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false