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Investment maturity period.

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Number of Advertising displays as of the balance sheet date.

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Number of states in which the entity operates with logo sign business as of the balance sheet date.

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Number Of States In Which Entity Operates With Transit Advertising Business

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Number Of Transit Advertising Displays

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Percentage Net Income Available For Dividend Distribution

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Consideration paid per share for dividends of preferred stock.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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The number of states the entity operates in as of the balance sheet date.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) $ / shares	Mar. 31, 2015 USD ($) $ / shares	Dec. 31, 2015 USD ($) State Transit Billboard Reporting_Unit $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of advertising displays \| Billboard			144,000
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			42,000
Number of states in which the company operates \| State			18
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	$ 0.75	$ 0.68	$ 2.75	$ 2.50
Distributions paid, preferred stockholders	$ 91	$ 91	$ 365	$ 365	$ 365
Distributions paid, preferred stockholders, per share \| $ / shares	$ 15.95	$ 15.95	$ 63.80	$ 63.80	$ 63.80
Dilutive shares \| shares			0	0	0
Non cash compensation expense	$ 3,199	$ 3,901	$ 25,890	$ 24,120	$ 24,936
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			144,000
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	3,199	3,901	$ 25,890	24,120	$ 24,936
Taxable Income Distribution [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Distributions paid	$ 72,734	$ 65,223	$ 265,145	$ 198,520
Distributions paid, per share \| $ / shares	$ 0.75	$ 0.68	$ 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
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non cash compensation expense			$ 9,560
Performance-Based Stock Incentive Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non cash compensation expense			16,076
Stock Awards to Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non cash compensation expense			$ 254
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