Goodwill and Other Intangible Assets - Summary of Changes in Gross Carrying Amount of Goodwill (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Goodwill [Line Items]
Goodwill, beginning balance	$ 1,800,130
Goodwill acquired during the year	180,001
Purchase price adjustments and other	(237)
Impairment losses	0
Goodwill, ending balance	1,979,894
LAMAR MEDIA CORP [Member]
Goodwill [Line Items]
Goodwill, beginning balance	1,789,110
Goodwill acquired during the year	180,001
Purchase price adjustments and other	(237)
Impairment losses	0
Goodwill, ending balance	$ 1,968,874