XML 86 R1.htm IDEA: XBRL DOCUMENT v2.4.0.6
Document and Entity Information (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Jun. 29, 2012
Feb. 22, 2013
Common Class A [Member]
Feb. 22, 2013
Common Class B [Member]
Feb. 22, 2013
Class Units [Member]
Dec. 31, 2012
LAMAR MEDIA CORP [Member]
Jun. 29, 2012
LAMAR MEDIA CORP [Member]
Entity Information [Line Items]              
Document Type 10-K         10-K  
Amendment Flag false         false  
Document Period End Date Dec. 31, 2012         Dec. 31, 2012  
Document Fiscal Year Focus 2012         2012  
Document Fiscal Period Focus FY         FY  
Trading Symbol LAMR            
Entity Registrant Name LAMAR ADVERTISING CO/NEW         LAMAR MEDIA CORP/DE  
Entity Central Index Key 0001090425         0000899045  
Current Fiscal Year End Date --12-31         --12-31  
Entity Well-known Seasoned Issuer Yes         No  
Entity Current Reporting Status Yes         Yes  
Entity Voluntary Filers No         No  
Entity Filer Category Large Accelerated Filer         Non-accelerated Filer  
Entity Common Stock, Shares Outstanding     78,965,663 14,910,365 100    
Entity Public Float   $ 2,218,657,098         $ 0