XML 20 R1.htm IDEA: XBRL DOCUMENT v3.23.3
Cover - shares
9 Months Ended
Sep. 30, 2023
Nov. 08, 2023
Entity Information [Line Items]    
Document Type 10-Q/A  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2023  
Document Transition Report false  
Entity File Number 001-15393  
Entity Registrant Name HEARTLAND FINANCIAL USA, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 42-1405748  
Entity Address, Address Line One 1800 Larimer Street, Suite 1800  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80202  
City Area Code 303  
Local Phone Number 285-9200  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   42,661,604
Entity Central Index Key 0000920112  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Common Stock, par value $1.00 per share    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, par value $1.00 per share  
Trading Symbol HTLF  
Security Exchange Name NASDAQ  
Depositary Shares, each representing 1/400th interest in a share of 7.00% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E    
Entity Information [Line Items]    
Title of 12(b) Security Depositary Shares, each representing 1/400th interest in a share of 7.00% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E  
Trading Symbol HTLFP  
Security Exchange Name NASDAQ