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, 2017	$ 1,103,493	$ 1,091,098	$ 84	$ 14	$ (21,300)	$ 1,762,499	$ 2,832,940	$ 1,302	$ 1,302	$ (639,106)	$ (1,743,144)
Non-cash compensation	11,968					11,968
Exercise of stock options	1,836					1,836
Issuance of shares of common stock through employee purchase plan	2,138					2,138
Purchase of treasury stock	(4,112)				(4,112)
Foreign currency translation	(543)							(543)
Contribution from parent		15,941					15,941
Foreign currency translations		(543)							(543)
Net income	15,052	15,158								15,052	15,158
Dividend to parent		(93,654)									(93,654)
Dividends/distributions to common shareholders	(89,542)									(89,542)
Dividends	(91)									(91)
Ending Balance at Mar. 31, 2018	1,040,199	1,028,000	84	14	(25,412)	1,778,441	2,848,881	759	759	(713,687)	(1,821,640)
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)