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Non-cash Financing and Investing Activities - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Supplemental Disclosure Of Non Cash Investing And Financing Information [Line Items]      
Non-cash acquisition of outdoor advertising assets $ 4,982 $ 23,941  
Non-cash investing activity     4,000
Payments for deposits     1,900
Total purchase price     11,539
LAMAR MEDIA CORP [Member]
      
Supplemental Disclosure Of Non Cash Investing And Financing Information [Line Items]      
Non-cash acquisition of outdoor advertising assets 4,982 23,941  
Non-cash investing activity 0 0 4,000
Payments for deposits     1,900
Total purchase price     $ 11,539