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Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]    
Total purchase price of outdoor advertising assets $ 46,160  
Purchase price, cash 45,584  
Purchase price, non cash consideration 576  
Portion of acquired intangible assets assigned to goodwill 1,912,328 $ 1,912,274
2020 Acquisitions [Member]    
Business Acquisition [Line Items]    
Total purchase price of outdoor advertising assets $ 46,160  
Weighted average useful life 14 years  
Aggregate amortization expense related to acquisition $ 1,356  
2020 Acquisitions [Member] | Customer Lists and Contracts [Member]    
Business Acquisition [Line Items]    
Weighted average useful life 7 years  
Total acquired intangible assets $ 3,979  
2020 Acquisitions [Member] | Site Locations [Member]    
Business Acquisition [Line Items]    
Weighted average useful life 15 years  
Total acquired intangible assets $ 27,902  
2019 Acquisitions [Member]    
Business Acquisition [Line Items]    
Total purchase price of outdoor advertising assets   226,278
Total purchase price of outdoor advertising assets   $ 227,588
Weighted average useful life   14 years
Aggregate amortization expense related to acquisition   $ 7,570
Cash acquired in acquisitions   1,508
Total acquired intangible assets   187,711
Portion of acquired intangible assets assigned to goodwill   29,360
Amount deductible for tax purposes   0
Total acquired intangible assets   $ 158,351
2019 Acquisitions [Member] | Customer Lists and Contracts [Member]    
Business Acquisition [Line Items]    
Weighted average useful life   7 years
Total acquired intangible assets   $ 23,032
2019 Acquisitions [Member] | Site Locations [Member]    
Business Acquisition [Line Items]    
Weighted average useful life   15 years
Total acquired intangible assets   $ 131,208
Fairway Outdoor Advertising [Member]    
Business Acquisition [Line Items]    
Post-closing adjustments to acquired working capital related to purchase   1,310
Portion of acquired assets assigned to property, plant and equipment   96,840
Portion of acquired assets assigned to intangibles   188,400
Portion of acquired assets assigned to intangibles   145,534
Reduction to preliminary purchase price allocation of goodwill   36,583
Income tax benefit recorded in deferred tax liabilities   17,031
July 15, 2019 Acquisitions [Member]    
Business Acquisition [Line Items]    
Total purchase price of outdoor advertising assets   $ 127,000