Revenues - Disaggregation Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net Revenues	$ 370,881	$ 406,569
Billboard Advertising [Member]
Disaggregation of Revenue [Line Items]
Net Revenues	334,039	355,305
Logo Advertising [Member]
Disaggregation of Revenue [Line Items]
Net Revenues	19,406	21,392
Transit Advertising [Member]
Disaggregation of Revenue [Line Items]
Net Revenues	$ 17,436	$ 29,872