v3.22.2.2
Document and Entity Information
Nov. 28, 2022
Cover [Abstract]  
Document Type 8-K
Document Period End Date Nov. 28, 2022
Entity Registrant Name HILLS BANCORPORATION
Entity Incorporation, State or Country Code IA
Entity File Number 0-12668
Entity Tax Identification Number 42-1208067
Entity Address, Address Line One 131 E. Main Street, PO Box 160
Entity Address, City or Town Hills
Entity Address, State or Province IA
Entity Address, Postal Zip Code 52235
City Area Code 319
Local Phone Number 679-2291
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0000732417
Amendment Flag false