XML 10 R1.htm IDEA: XBRL DOCUMENT v3.22.2.2
Cover Page - shares
 3 Months Ended
Sep. 30, 2022
Nov. 04, 2022
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2022  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q1  
Trading Symbol IROQ  
Entity Registrant Name IF Bancorp, Inc.  
Entity Central Index Key 0001514743  
Current Fiscal Year End Date --06-30  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   3,337,626
Entity Interactive Data Current Yes  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Entity Address, State or Province IL  
Entity Address, Address Line One 201 East Cherry Street  
Entity Address, City or Town Watseka  
City Area Code 815  
Local Phone Number 432-2476  
Entity Tax Identification Number 45-1834449  
Entity Incorporation, State or Country Code MD  
Entity File Number 001-35226  
Entity Address, Postal Zip Code 60970