Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	Apr. 24, 2020
Document and Entity Information
Entity Registrant Name	MIDLAND STATES BANCORP, INC.
Entity Central Index Key	0001466026
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Document Quarterly Report	true
Document Transition Report	false
Amendment Flag	false
Entity File Number	001-35272
Title of 12(b) Security	Common stock, $0.01 par value
Entity Incorporation, State or Country Code	IL
Entity Tax Identification Number	37-1233196
Entity Address, Postal Zip Code	62401
Entity Address, Address Line One	1201 Network Centre Drive
Entity Address, City or Town	Effingham
Entity Address, Country	IL
Local Phone Number	342-7321
City Area Code	217
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Trading Symbol	MSBI
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		23,203,015
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1