Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 13,438	$ 14,946
Current deferred financing costs	333	445
Noncurrent deferred financing costs	$ 39,912	$ 39,672
Shares held in treasury	684,971	619,681
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]
Allowance for doubtful accounts	$ 13,438	$ 14,946
Current deferred financing costs	333	445
Noncurrent deferred financing costs	$ 39,912	$ 39,672
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000	3,000
Common stock, shares issued (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Series A A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, cumulative dividends	$ 63.80	$ 63.80
Preferred stock, shares authorized (in shares)	5,720	5,720
Preferred stock, shares issued (in shares)	5,720	5,720
Preferred stock, shares outstanding (in shares)	5,720	5,720
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	362,500,000	362,500,000
Common stock, shares issued (in shares)	87,374,252	87,111,327
Common stock, shares outstanding (in shares)	86,689,281	86,491,646
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	37,500,000	37,500,000
Common stock, shares issued (in shares)	14,420,085	14,420,085
Common stock, shares outstanding (in shares)	14,420,085	14,420,085