v3.25.2
Cover Page - USD ($)
12 Months Ended
Dec. 31, 2024
Jun. 13, 2025
Jun. 30, 2024
Document Information [Line Items]      
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 001-35272    
Entity Registrant Name MIDLAND STATES BANCORP, INC.    
Entity Incorporation, State or Country Code IL    
Entity Tax Identification Number 37-1233196    
Entity Address, Address Line One 1201 Network Centre Drive    
Entity Address, City or Town Effingham    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 62401    
City Area Code 217    
Local Phone Number 342-7321    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status No    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] true    
Document Financial Statement Restatement Recovery Analysis [Flag] true    
Entity Shell Company false    
Entity Public Float     $ 466,599,960
Entity Common Stock, Shares Outstanding (in shares)   21,515,138  
Entity Central Index Key 0001466026    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common stock      
Document Information [Line Items]      
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol MSBI    
Security Exchange Name NASDAQ    
Depository Shares      
Document Information [Line Items]      
Title of 12(b) Security Depositary Shares, each representing a 1/40th interest in a share of 7.75% fixed rate reset non-cumulative perpetual preferred stock, Series A    
Trading Symbol MSBIP    
Security Exchange Name NASDAQ