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Accrued Expenses - Summary of Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accounts Payable And Accrued Liabilities Current And Noncurrent [Line Items]    
Payroll $ 12,854 $ 10,519
Interest 31,888 36,125
Insurance benefits 12,537 12,338
Accrued lease expense 32,100 26,975
Other 10,082 8,697
Total 99,461 94,654
LAMAR MEDIA CORP [Member]
    
Accounts Payable And Accrued Liabilities Current And Noncurrent [Line Items]    
Payroll 12,854 10,519
Interest 31,888 36,125
Other 52,118 46,671
Total $ 96,860 $ 93,315