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Revenues - Disaggregation Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Net Revenues	$ 386,110	$ 457,786	$ 1,140,331	$ 1,290,985
Billboard Advertising [Member]
Disaggregation Of Revenue [Line Items]
Net Revenues	348,361	404,046	1,015,761	1,134,039
Logo Advertising [Member]
Disaggregation Of Revenue [Line Items]
Net Revenues	19,790	21,056	62,235	62,779
Transit Advertising [Member]
Disaggregation Of Revenue [Line Items]
Net Revenues	$ 17,959	$ 32,684	$ 62,335	$ 94,167

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