Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]	Accumulated Comprehensive Income (Loss) [Member]	Accumulated Comprehensive Income (Loss) [Member] LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]
Beginning Balance at Dec. 31, 2018	$ 1,131,784	$ 1,120,196	$ 86	$ 14	$ (25,412)	$ 1,852,421	$ 2,922,907	$ 12	$ 12	$ (695,337)	$ (1,802,723)
Non-cash compensation	21,097					21,097
Exercise of stock options	7,352					7,352
Issuance of shares of common stock through employee purchase plan	2,521					2,521
Purchase of treasury stock	(8,682)				(8,682)
Foreign currency translation	259							259
Contribution from parent		30,970					30,970
Foreign currency translations		259							259
Net income	51,253	51,362								51,253	51,362
Dividend to parent		(104,597)									(104,597)
Dividends/distributions to common shareholders	(95,915)									(95,915)
Dividends	(91)									(91)
Ending Balance at Mar. 31, 2019	1,109,578	1,098,190	86	14	(34,094)	1,883,391	2,953,877	271	271	(740,090)	(1,855,958)
Beginning Balance at Dec. 31, 2019	1,180,306	1,169,531	87	14	(34,294)	1,922,222	2,992,729	685	685	(708,408)	(1,823,883)
Non-cash compensation	26,217					26,217
Exercise of stock options	652					652
Issuance of shares of common stock through employee purchase plan	2,560					2,560
Purchase of treasury stock	(10,068)				(10,068)
Foreign currency translation	(1,598)							(1,598)
Contribution from parent		29,429					29,429
Foreign currency translations		(1,598)							(1,598)
Net income	40,493	40,617								40,493	40,617
Dividend to parent		(110,755)									(110,755)
Dividends/distributions to common shareholders	(100,687)									(100,687)
Dividends	(91)									(91)
Ending Balance at Mar. 31, 2020	$ 1,137,784	$ 1,127,224	$ 87	$ 14	$ (44,362)	$ 1,951,651	$ 3,022,158	$ (913)	$ (913)	$ (768,693)	$ (1,894,021)