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Document And Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Feb. 18, 2020
Jun. 30, 2019
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2019    
Entity File Number 0-11487    
Entity Registrant Name LAKELAND FINANCIAL CORPORATION    
Entity Incorporation, State or Country Code IN    
Entity Tax Identification Number 35-1559596    
Entity Address, Address Line One 202 East Center Street    
Entity Address, Address Line Two P.O. Box 1387    
Entity Address, City or Town Warsaw    
Entity Address, State or Province IN    
Entity Address, Postal Zip Code 46581    
City Area Code 574    
Local Phone Number 267-6144    
Title of 12(b) Security Common Stock, no par value    
Trading Symbol LKFN    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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 Public Float     $ 1,128,651,235
Entity Common Stock, Shares Outstanding   25,701,115  
Entity Central Index Key 0000721994    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false