Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($) Billboard State Transit Reporting_Unit $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of advertising displays \| Billboard	149,000
Number of states in which the company operates \| State	44
Number of states in which the company operates logo sign business \| State	23
Number of transit advertising displays \| Transit	41,000
Number of states in which the company operates transit advertising displays \| State	19
Number of reporting units \| Reporting_Unit	2
REIT threshold percentage of taxable income to be distributed to stockholders	90.00%
Distributions paid, per share \| $ / shares	$ 3.02	$ 2.75	$ 2.50
Distributions paid, preferred stockholders	$ 365	$ 365	$ 365
Distributions paid, preferred stockholders, per share \| $ / shares	$ 63.80	$ 63.80	$ 63.80
Dilutive shares \| shares	0	0	0
Non cash compensation expense	$ 28,560	$ 25,890	$ 24,120
Investment maturity period	Three months or less
LAMAR MEDIA CORP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of advertising displays \| Billboard	149,000
Number of states in which the company operates \| State	44
Number of states in which the company operates logo sign business \| State	23
Non cash compensation expense	$ 28,560	25,890	24,120
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non cash compensation expense	10,142
Performance-Based Stock Incentive Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non cash compensation expense	18,069
Stock Awards to Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non cash compensation expense	349
Taxable Income Distribution [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Distributions paid	$ 293,600	$ 265,145	$ 198,520
Distributions paid, per share \| $ / shares	$ 3.02	$ 2.75	$ 2.08
Accumulated Earnings And Profits [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Distributions paid			$ 39,915
Distributions paid, per share \| $ / shares			$ 0.42
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Estimated useful lives of Intangible assets	3 years
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Estimated useful lives of Intangible assets	15 years

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