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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2022
Mar. 29, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2022    
Document Transition Report false    
Entity File Number 0-23636    
Entity Registrant Name HAWTHORN BANCSHARES, INC.    
Entity Incorporation, State or Country Code MO    
Entity Tax Identification Number 43-1626350    
Entity Address, Address Line One 132 East High Street, Box 688    
Entity Address, City or Town Jefferson City    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 65102    
City Area Code 573    
Local Phone Number 761-6100    
Title of 12(b) Security Common Stock, $1.00 par value    
Trading Symbol HWBK    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 132,733,338
Entity Common Stock, Shares Outstanding   6,768,581  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the following documents are incorporated by reference into the indicated parts of this report: (1) 2022 Annual Report to Shareholders - Part II and (2) definitive Proxy Statement for the 2023 Annual Meeting of Shareholders to be filed with the Commission pursuant to Regulation 14A - Part III.
    
Entity Central Index Key 0000893847    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false