XML 78 R1.htm IDEA: XBRL DOCUMENT v2.4.0.8
Document and Entity Information (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Jun. 28, 2013
Feb. 18, 2014
Common Class A [Member]
Feb. 18, 2014
Common Class B [Member]
Dec. 31, 2013
LAMAR MEDIA CORP [Member]
Jun. 28, 2013
LAMAR MEDIA CORP [Member]
Feb. 18, 2014
LAMAR MEDIA CORP [Member]
Class Units [Member]
Document Information [Line Items]              
Document Type 10-K       10-K    
Amendment Flag false       false    
Document Period End Date Dec. 31, 2013       Dec. 31, 2013    
Document Fiscal Year Focus 2013       2013    
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     80,226,132 14,610,365     100
Entity Public Float   $ 3,085,912,810.91       $ 0.00