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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 01, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Trading Symbol LAMR    
Entity Registrant Name LAMAR ADVERTISING CO/NEW    
Entity Central Index Key 0001090425    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 5,693,120,893
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity File Number 1-36756    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-0961620    
Entity Address, Address Line One 5321 Corporate Blvd.,    
Entity Address, City or Town Baton Rouge    
Entity Address, State or Province LA    
Entity Address, Postal Zip Code 70808    
City Area Code 225    
Local Phone Number 926-1000    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Title of 12(b) Security Class A common stock, $0.001 par value    
Security Exchange Name NASDAQ    
ICFR Auditor Attestation Flag true    
Documents Incorporated by Reference

Document

  

Parts into Which Incorporated

Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on May 20, 2021 (Proxy Statement)

  

Part III

This combined Form 10-K is separately filed by (i) Lamar Advertising Company and (ii) Lamar Media Corp. (which is a wholly owned subsidiary of Lamar Advertising Company). Lamar Media Corp. meets the conditions set forth in general instruction I(1) (a) and (b) of Form 10-K and is, therefore, filing this form with the reduced disclosure format permitted by such instruction.

 

    
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   86,491,646  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   14,420,085  
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]      
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Registrant Name LAMAR MEDIA CORP/DE    
Entity Central Index Key 0000899045    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 0
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity File Number 1-12407    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 72-1205791    
Entity Address, Address Line One 5321 Corporate Blvd.,    
Entity Address, City or Town Baton Rouge    
Entity Address, State or Province LA    
Entity Address, Postal Zip Code 70808    
City Area Code 225    
Local Phone Number 926-1000    
ICFR Auditor Attestation Flag true    
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member] | Class Units [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   100