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Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Operating Loss Carryforwards [Line Items]      
Income taxes payable $ 848 $ 252  
Income tax rate 35.00% 35.00% 35.00%
Net operating loss subject to IRC 382 13,049    
Amounts of credits available to offset income tax 4,443    
Net change in total valuation allowance (1,087) (332) 410
Net operating loss 223,437 214,526 183,601
Potential deferred tax liability 7,583    
Undistributed earnings of subsidiaries 21,665    
Unrecognized tax benefits 35 75 135
Interest and penalty expense 1 3  
Interest and penalties related to uncertain tax positions 4 14  
Unrecognized tax benefits, decreases resulting from expiration of statute of limitations 35    
LAMAR MEDIA CORP [Member]
      
Operating Loss Carryforwards [Line Items]      
Income taxes payable 630 0  
Income tax rate 35.00% 35.00% 35.00%
Net operating loss subject to IRC 382 13,049    
Amounts of credits available to offset income tax 19,214    
Net change in total valuation allowance (1,085) (356) 407
Net operating loss 223,772 214,862 183,959
Potential deferred tax liability 7,583    
Undistributed earnings of subsidiaries 21,665    
Unrecognized tax benefits 35 75 135
Interest and penalty expense 1 3  
Interest and penalties related to uncertain tax positions 4 14  
Unrecognized tax benefits, decreases resulting from expiration of statute of limitations 35    
Domestic Country [Member]
      
Operating Loss Carryforwards [Line Items]      
US net operating loss carry forward 65,641    
Domestic Country [Member] | LAMAR MEDIA CORP [Member]
      
Operating Loss Carryforwards [Line Items]      
US net operating loss carry forward 65,976    
State and Local Jurisdiction [Member]
      
Operating Loss Carryforwards [Line Items]      
Amounts of credits available to offset income tax 247    
State net operating loss carry forward 430,191    
Valuation allowance for State and Local deferred tax assets 2,323 3,410  
State and Local Jurisdiction [Member] | LAMAR MEDIA CORP [Member]
      
Operating Loss Carryforwards [Line Items]      
Amounts of credits available to offset income tax 247    
State net operating loss carry forward 392,470    
Valuation allowance for State and Local deferred tax assets 1,751 2,836  
U S [Member]
      
Operating Loss Carryforwards [Line Items]      
US net operating loss carry forwards 305,172    
U S [Member] | LAMAR MEDIA CORP [Member]
      
Operating Loss Carryforwards [Line Items]      
US net operating loss carry forwards 169,411    
Puerto Rico [Member]
      
Operating Loss Carryforwards [Line Items]      
Amounts of credits available to offset income tax 154    
Puerto Rico net operating loss carry forward 28,523    
Net operating loss 3,285    
Puerto Rico [Member] | LAMAR MEDIA CORP [Member]
      
Operating Loss Carryforwards [Line Items]      
Amounts of credits available to offset income tax 154    
Puerto Rico net operating loss carry forward 28,523    
Net operating loss $ 3,285