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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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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

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