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Property, Plant and Equipment - Summary of Major Categories of Property, Plant and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Land [Member]
Dec. 31, 2011
Land [Member]
Dec. 31, 2012
Land [Member]
Minimum [Member]
Dec. 31, 2012
Land [Member]
Maximum [Member]
Dec. 31, 2012
Building and improvements [Member]
Dec. 31, 2011
Building and improvements [Member]
Dec. 31, 2012
Building and improvements [Member]
Minimum [Member]
Dec. 31, 2012
Building and improvements [Member]
Maximum [Member]
Dec. 31, 2012
Advertising structures [Member]
Dec. 31, 2011
Advertising structures [Member]
Dec. 31, 2012
Advertising structures [Member]
Minimum [Member]
Dec. 31, 2012
Advertising structures [Member]
Maximum [Member]
Dec. 31, 2012
Automotive and other equipment [Member]
Dec. 31, 2011
Automotive and other equipment [Member]
Dec. 31, 2012
Automotive and other equipment [Member]
Minimum [Member]
Dec. 31, 2012
Automotive and other equipment [Member]
Maximum [Member]
Property, Plant and Equipment [Line Items]                                    
Property plant and equipment, Estimated life                   10 years 39 years     5 years 15 years     3 years 7 years
Property, plant and equipment $ 2,940,449 $ 2,860,592 $ 317,223 $ 307,968     $ 115,646 $ 108,820     $ 2,378,940 $ 2,309,775     $ 128,640 $ 134,029