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Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
LAMAR MEDIA CORP [Member]
Dec. 31, 2012
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Dec. 31, 2013
Customer lists and contracts [Member]
Dec. 31, 2012
Customer lists and contracts [Member]
Dec. 31, 2013
Customer lists and contracts [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2012
Customer lists and contracts [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Customer lists and contracts [Member]
Minimum [Member]
Dec. 31, 2013
Customer lists and contracts [Member]
Minimum [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Customer lists and contracts [Member]
Maximum [Member]
Dec. 31, 2013
Customer lists and contracts [Member]
Maximum [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Non-competition agreements [Member]
Dec. 31, 2012
Non-competition agreements [Member]
Dec. 31, 2013
Non-competition agreements [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2012
Non-competition agreements [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Non-competition agreements [Member]
Minimum [Member]
Dec. 31, 2013
Non-competition agreements [Member]
Minimum [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Non-competition agreements [Member]
Maximum [Member]
Dec. 31, 2013
Non-competition agreements [Member]
Maximum [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Site locations [Member]
Dec. 31, 2012
Site locations [Member]
Dec. 31, 2013
Site locations [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2012
Site locations [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Site locations [Member]
Maximum [Member]
Dec. 31, 2013
Site locations [Member]
Maximum [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Other [Member]
Dec. 31, 2012
Other [Member]
Dec. 31, 2013
Other [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2012
Other [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Other [Member]
Minimum [Member]
Dec. 31, 2013
Other [Member]
Minimum [Member]
LAMAR MEDIA CORP [Member]
Dec. 31, 2013
Other [Member]
Maximum [Member]
Dec. 31, 2013
Other [Member]
Maximum [Member]
LAMAR MEDIA CORP [Member]
Finite-Lived Intangible Assets [Line Items]                                                                        
Estimated Life (Years)         3 years 15 years         7 years 7 years 10 years 10 years         3 years 3 years 15 years 15 years         15 years 15 years         5 years 5 years 15 years 15 years
Gross Carrying Amount $ 2,065,875 $ 2,009,191 $ 2,065,330 $ 2,008,646     $ 492,299 $ 482,883 $ 492,299 $ 482,883         $ 63,933 $ 63,519 $ 63,933 $ 63,519         $ 1,495,635 $ 1,449,181 $ 1,495,635 $ 1,449,181     $ 14,008 $ 13,608 $ 13,463 $ 13,063        
Accumulated Amortization 1,646,490 1,540,879 1,646,411 1,540,809     463,188 455,549 463,188 455,549         62,914 62,566 62,914 62,566         1,106,947 1,009,631 1,106,945 1,009,631     13,441 13,133 13,364 13,063        
Goodwill gross carrying amount 1,757,089 1,738,686 1,746,068 1,727,665                                                                
Goodwill accumulated amortization $ 253,536 $ 253,536 $ 252,667 $ 252,667