Income Taxes - Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax [Line Items]
U.S. federal, Current	$ 9,518	$ 7,686	$ 8,721
State and local, Current	2,681	1,746	2,632
Foreign, Current	1,500	1,527	692
Total Current	13,699	10,959	12,045
U.S. federal, Deferred	(935)	(930)	(119,014)
State and local, Deferred	(6)	(246)	(2,909)
Foreign, Deferred	598	12,275	(214)
Total, Deferred	(343)	11,099	(122,137)
U.S. federal, Total	8,583	6,756	(110,293)
State and local, Total	2,675	1,500	(277)
Foreign, Total	2,098	13,802	478
Income tax expense	13,356	22,058	(110,092)
LAMAR MEDIA CORP [Member]
Income Tax [Line Items]
U.S. federal, Current	9,518	7,686	8,993
State and local, Current	2,681	1,746	2,579
Foreign, Current	1,500	1,527	692
Total Current	13,699	10,959	12,264
U.S. federal, Deferred	(935)	(930)	(151,191)
State and local, Deferred	(6)	(246)	(4,124)
Foreign, Deferred	598	12,275	(213)
Total, Deferred	(343)	11,099	(155,528)
U.S. federal, Total	8,583	6,756	(142,198)
State and local, Total	2,675	1,500	(1,545)
Foreign, Total	2,098	13,802	479
Income tax expense	$ 13,356	$ 22,058	$ (143,264)