Goodwill and Other Intangible Assets (Subsidiary) - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,416,914	$ 3,174,658
Accumulated Amortization	2,371,737	2,260,212
Goodwill gross carrying amount	2,189,962	2,165,864	$ 2,165,810
Goodwill accumulated amortization	253,536	253,536
LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,416,369	3,174,112
Accumulated Amortization	2,371,660	2,260,134
Goodwill gross carrying amount	2,178,941	2,154,844	$ 2,154,790
Goodwill accumulated amortization	$ 252,667	252,667
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years
Customer lists and contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 676,846	645,739
Accumulated Amortization	587,056	563,135
Customer lists and contracts | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	676,846	645,739
Accumulated Amortization	$ 587,056	563,135
Customer lists and contracts | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	7 years
Customer lists and contracts | Minimum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	7 years
Customer lists and contracts | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	10 years
Customer lists and contracts | Maximum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	10 years
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 69,276	66,156
Accumulated Amortization	64,941	64,647
Non-competition agreements | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	69,276	66,156
Accumulated Amortization	$ 64,942	64,647
Non-competition agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	3 years
Non-competition agreements | Minimum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	3 years
Non-competition agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years
Non-competition agreements | Maximum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years
Site locations
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years
Gross Carrying Amount	$ 2,619,531	2,412,745
Accumulated Amortization	1,680,333	1,593,805
Site locations | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,619,531	2,412,745
Accumulated Amortization	$ 1,680,333	1,593,805
Site locations | Maximum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 51,261	50,018
Accumulated Amortization	39,407	38,625
Other | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	50,716	49,472
Accumulated Amortization	$ 39,329	$ 38,547
Other | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	2 years
Other | Minimum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	2 years
Other | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years
Other | Maximum | LAMAR MEDIA CORP. AND SUBSIDIARIES
Finite-Lived Intangible Assets [Line Items]
Estimated Life (Years)	15 years