Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deducted in Balance Sheet from Trade Accounts Receivable: Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 8,984	$ 7,957	$ 7,615
Charged to Costs and Expenses	6,870	6,506	5,947
Deductions	6,498	5,479	5,605
Balance at End of Period	9,356	8,984	7,957
Deducted in Balance Sheet from Trade Accounts Receivable: Allowance for Doubtful Accounts [Member] | LAMAR MEDIA CORP [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	8,984	7,957	7,615
Charged to Costs and Expenses	6,870	6,506	5,947
Deductions	6,498	5,479	5,605
Balance at End of Period	9,356	8,984	7,957
Deducted in Balance Sheet from Deferred Tax Assets: Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	13,827	9	2,331
Charged to Costs and Expenses	2,340	13,821
Deductions		3	2,322
Balance at End of Period	16,167	13,827	9
Deducted in Balance Sheet from Deferred Tax Assets: Valuation Allowance [Member] | LAMAR MEDIA CORP [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	13,827	9	1,760
Charged to Costs and Expenses	2,340	13,821
Deductions		3	1,751
Balance at End of Period	$ 16,167	$ 13,827	$ 9