Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net revenues	$ 457,786	$ 418,498	$ 1,290,985	$ 1,199,324
Type of Revenue [Extensible List]	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember
Operating expenses (income)
Direct advertising expenses (exclusive of depreciation and amortization)	$ 148,846	$ 140,699	$ 435,706	$ 419,776
Type of Cost, Good or Service [Extensible List]	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember
General and administrative expenses (exclusive of depreciation and amortization)	$ 80,561	$ 73,166	$ 238,270	$ 213,060
Corporate expenses (exclusive of depreciation and amortization)	23,185	20,776	58,888	62,027
Depreciation and amortization	63,951	55,089	187,150	167,251
(Gain) loss on disposition of assets	(199)	407	(5,360)	7,265
Total Operating Expenses	316,344	290,137	914,654	869,379
Operating income	141,442	128,361	376,331	329,945
Other expense (income)
Loss on extinguishment of debt				15,429
Interest income	(168)	(157)	(553)	(313)
Interest expense	38,323	31,850	114,240	97,321
Non-operating (Income) Expenses	38,155	31,693	113,687	112,437
Income before income tax expense	103,287	96,668	262,644	217,508
Income tax expense (benefit)	3,578	2,612	(6,714)	7,969
Net income	99,709	94,056	269,358	209,539
Cash dividends declared and paid on preferred stock	91	91	273	273
Net income applicable to common stock	$ 99,618	$ 93,965	$ 269,085	$ 209,266
Earnings per share:
Basic earnings per share	$ 0.99	$ 0.95	$ 2.69	$ 2.12
Diluted earnings per share	0.99	0.95	2.69	2.12
Cash dividends declared per share of common stock	$ 0.96	$ 0.91	$ 2.88	$ 2.73
Weighted average common shares used in computing earnings per share:
Weighted average common shares outstanding basic	100,329,262	98,943,535	100,019,765	98,596,828
Weighted average common shares outstanding diluted	100,522,177	99,253,008	100,210,143	98,870,116
Statements of Comprehensive Income
Net income	$ 99,709	$ 94,056	$ 269,358	$ 209,539
Other comprehensive (loss) income
Foreign currency translation adjustments	(174)	221	372	(599)
Comprehensive income	99,535	94,277	269,730	208,940
LAMAR MEDIA CORP. AND SUBSIDIARIES [Member]
Net revenues	$ 457,786	$ 418,498	$ 1,290,985	$ 1,199,324
Type of Revenue [Extensible List]	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember
Operating expenses (income)
Direct advertising expenses (exclusive of depreciation and amortization)	$ 148,846	$ 140,699	$ 435,706	$ 419,776
Type of Cost, Good or Service [Extensible List]	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember	us-gaap:AdvertisingMember
General and administrative expenses (exclusive of depreciation and amortization)	$ 80,561	$ 73,166	$ 238,270	$ 213,060
Corporate expenses (exclusive of depreciation and amortization)	23,062	20,667	58,567	61,723
Depreciation and amortization	63,951	55,089	187,150	167,251
(Gain) loss on disposition of assets	(199)	407	(5,360)	7,265
Total Operating Expenses	316,221	290,028	914,333	869,075
Operating income	141,565	128,470	376,652	330,249
Other expense (income)
Loss on extinguishment of debt				15,429
Interest income	(168)	(157)	(553)	(313)
Interest expense	38,323	31,850	114,240	97,321
Non-operating (Income) Expenses	38,155	31,693	113,687	112,437
Income before income tax expense	103,410	96,777	262,965	217,812
Income tax expense (benefit)	3,578	2,612	(6,714)	7,969
Net income	99,832	94,165	269,679	209,843
Statements of Comprehensive Income
Net income	99,832	94,165	269,679	209,843
Other comprehensive (loss) income
Foreign currency translation adjustments	(174)	221	372	(599)
Comprehensive income	$ 99,658	$ 94,386	$ 270,051	$ 209,244