Long-term Debt (Subsidiary) - Interest Rates on Notes (Detail)	Dec. 31, 2021	Jan. 22, 2021	Dec. 31, 2020	May 13, 2020	Jan. 28, 2016
3 3/4% Senior Notes
Debt Instrument [Line Items]
Interest rate on senior notes	3.75%		3.75%
3 3/4% Senior Notes | LAMAR MEDIA CORP. AND SUBSIDIARIES
Debt Instrument [Line Items]
Interest rate on senior notes	3.75%		3.75%
4 7/8% Senior Notes
Debt Instrument [Line Items]
Interest rate on senior notes	4.875%		4.875%	4.875%
4 7/8% Senior Notes | LAMAR MEDIA CORP. AND SUBSIDIARIES
Debt Instrument [Line Items]
Interest rate on senior notes	4.875%		4.875%
5 3/4% Senior Notes
Debt Instrument [Line Items]
Interest rate on senior notes	5.75%				5.75%
5 3/4% Senior Notes | LAMAR MEDIA CORP. AND SUBSIDIARIES
Debt Instrument [Line Items]
Interest rate on senior notes			5.75%
4% Senior Notes | LAMAR MEDIA CORP. AND SUBSIDIARIES
Debt Instrument [Line Items]
Interest rate on senior notes	4.00%		4.00%
3 5/8% Senior Notes
Debt Instrument [Line Items]
Interest rate on senior notes	3.625%	3.625%
3 5/8% Senior Notes | LAMAR MEDIA CORP. AND SUBSIDIARIES
Debt Instrument [Line Items]
Interest rate on senior notes	3.625%