v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Aug. 05, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Period End Date Jun. 30, 2025  
Entity File Number 0-7818  
Entity Registrant Name INDEPENDENT BANK CORPORATION  
Entity Incorporation, State or Country Code MI  
Entity Tax Identification Number 38-2032782  
Entity Address, Address Line One 4200 East Beltline  
Entity Address, City or Town Grand Rapids  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 49525  
City Area Code 616  
Local Phone Number 527-5820  
Title of 12(b) Security Common stock, no par value  
Trading Symbol IBCP  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   20,709,510
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Entity Central Index Key 0000039311  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false