Condensed Consolidating Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net revenues	$ 346,362	$ 338,533
Operating expenses
Direct advertising expenses	131,844	128,725
General and administrative expenses	72,031	66,790
Corporate expenses	16,633	16,026
Depreciation and amortization	51,425	51,489
(Gain) loss on disposition of assets	(1,036)	(11,327)
Total Operating Expenses	270,897	251,703
Operating income	75,465	86,830
Income before income tax expense	43,986	53,621
Income tax expense	2,199	2,307
Net income	41,787	51,314
Statements of Comprehensive Income
Net income	41,787	51,314
Comprehensive income	41,930	52,782
LAMAR MEDIA CORP [Member]
Net revenues	346,362	338,533
Operating expenses
Direct advertising expenses	131,844	128,725
General and administrative expenses	72,031	66,790
Corporate expenses	16,527	15,933
Depreciation and amortization	51,425	51,489
(Gain) loss on disposition of assets	(1,036)	(11,327)
Total Operating Expenses	270,791	251,610
Operating income	75,571	86,923
Interest expense (income), net	31,479	30,067
Other expenses		3,142
Income before income tax expense	44,092	53,714
Income tax expense	2,199	2,307
Net income	41,893	51,407
Statements of Comprehensive Income
Net income	41,893	51,407
Total other comprehensive income, net of tax	143	1,468
Comprehensive income	42,036	52,875
LAMAR MEDIA CORP [Member] | Reportable Legal Entities [Member] | Lamar Media [Member]
Operating expenses
Equity in (earnings) loss of subsidiaries	(73,374)	(84,610)
Interest expense (income), net	31,481	30,061
Other expenses		3,142
Income before income tax expense	41,893	51,407
Net income	41,893	51,407
Statements of Comprehensive Income
Net income	41,893	51,407
Comprehensive income	41,893	51,407
LAMAR MEDIA CORP [Member] | Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Net revenues	335,803	327,578
Operating expenses
Direct advertising expenses	125,104	121,889
General and administrative expenses	70,012	63,999
Corporate expenses	16,257	15,648
Depreciation and amortization	49,248	49,689
(Gain) loss on disposition of assets	(1,037)	(11,560)
Total Operating Expenses	259,584	239,665
Operating income	76,219	87,913
Interest expense (income), net	(3)	(1)
Income before income tax expense	76,222	87,914
Income tax expense	1,723	1,926
Net income	74,499	85,988
Statements of Comprehensive Income
Net income	74,499	85,988
Comprehensive income	74,499	85,988
LAMAR MEDIA CORP [Member] | Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Net revenues	11,474	11,835
Operating expenses
Direct advertising expenses	7,287	7,396
General and administrative expenses	2,019	2,791
Corporate expenses	270	285
Depreciation and amortization	2,177	1,800
(Gain) loss on disposition of assets	1	233
Total Operating Expenses	11,754	12,505
Operating income	(280)	(670)
Interest expense (income), net	369	327
Income before income tax expense	(649)	(997)
Income tax expense	476	381
Net income	(1,125)	(1,378)
Statements of Comprehensive Income
Net income	(1,125)	(1,378)
Total other comprehensive income, net of tax	143	1,468
Comprehensive income	(982)	90
LAMAR MEDIA CORP [Member] | Eliminations [Member]
Net revenues	(915)	(880)
Operating expenses
Direct advertising expenses	(547)	(560)
Total Operating Expenses	(547)	(560)
Operating income	(368)	(320)
Equity in (earnings) loss of subsidiaries	73,374	84,610
Interest expense (income), net	(368)	(320)
Income before income tax expense	(73,374)	(84,610)
Net income	(73,374)	(84,610)
Statements of Comprehensive Income
Net income	(73,374)	(84,610)
Comprehensive income	$ (73,374)	$ (84,610)