Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interim Reporting [Line Items]
Net revenues	$ 386,717	$ 387,516	$ 387,528	$ 338,533	$ 355,969	$ 350,701	$ 344,249	$ 302,477	$ 1,500,294	$ 1,353,396	$ 1,287,060
Net revenues less direct advertising expenses	254,348	255,738	254,803	209,808	233,068	229,025	228,298	189,245
Net income applicable to common stock	$ 80,433	$ 84,970	$ 81,818	$ 51,223	$ 76,437	$ 85,874	$ 59,269	$ 40,625	298,444	262,205	253,153
Net income									$ 298,809	$ 262,570	$ 253,518
Net income per common share basic	$ 0.83	$ 0.87	$ 0.84	$ 0.53	$ 0.80	$ 0.89	$ 0.61	$ 0.42	$ 3.07	$ 2.72	$ 2.66
Net income per common share - diluted	$ 0.81	$ 0.87	$ 0.84	$ 0.53	$ 0.80	$ 0.89	$ 0.61	$ 0.42	$ 3.05	$ 2.72	$ 2.66
LAMAR MEDIA CORP [Member]
Interim Reporting [Line Items]
Net revenues	$ 386,717	$ 387,516	$ 387,528	$ 338,533	$ 355,969	$ 350,701	$ 344,249	$ 302,477	$ 1,500,294	$ 1,353,396	$ 1,287,060
Net revenues less direct advertising expenses	254,348	255,738	254,803	209,808	233,068	229,025	228,298	189,245
Net income	$ 80,608	$ 85,168	$ 81,998	$ 51,407	$ 76,607	$ 86,043	$ 59,449	$ 40,804	$ 299,181	$ 262,903	$ 287,035