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Percentage of aggregate principle which may be redeemed at any time at a specified price.

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Percentage premium which may be required for repayment if the Company undergoes a change in control.

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Debt instrument redemption, percentage of debt outstanding, post redemption.

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Debt instrument redemption period.

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Line Of Credit Facility Amended And Restated Date

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Ratio of indebtedness to net capital minimum.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Percentage of principal amount of debt redeemed.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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The cash inflow from bank borrowing during the year.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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Indebtedness divided by net capital.

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Long-term Debt - Additional Information (Detail)						12 Months Ended
Long-term Debt - Additional Information (Detail)	Jan. 28, 2016 USD ($)	Apr. 18, 2014 USD ($)	Jan. 10, 2014 USD ($)	Oct. 30, 2012 USD ($)	Feb. 09, 2012 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Feb. 03, 2014 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount of debt issued						$ 2,378,152,000
Proceeds received from senior credit facility						300,000,000	$ 300,000,000
Loss on extinguishment of debt						3,198,000	26,023,000
Amended and restated date		Apr. 18, 2014
Outstanding revolving credit facility						180,000,000
Remaining borrowing capacity under revolving credit facility						209,896,000
Term A Loan Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing limit of incremental loan facility		$ 300,000,000
Term A Loan Facility [Member] \| LIBO Rate [Member]
Debt Instrument [Line Items]
Adjusted Rate		2.00%
Ratio of indebtedness to net capital one		3.00
Ratio of indebtedness to net capital minimum		1
Term A Loan Facility [Member] \| LIBO Rate [Member] \| Debt Ratio Less Than or Equal to Three [Member]
Debt Instrument [Line Items]
Adjusted Rate		1.75%
Term A Loan Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Adjusted Rate		1.00%
Ratio of indebtedness to net capital one		3.00
Ratio of indebtedness to net capital minimum		1
Term A Loan Facility [Member] \| Base Rate [Member] \| Debt Ratio Less Than or Equal to Three [Member]
Debt Instrument [Line Items]
Adjusted Rate		0.75%
Revolving Credit Facility [Member] \| LIBO Rate [Member]
Debt Instrument [Line Items]
Adjusted Rate		2.25%
Ratio of indebtedness to net capital one		3.00
Ratio of indebtedness to net capital minimum		1
Revolving Credit Facility [Member] \| LIBO Rate [Member] \| Debt Ratio Less Than or Equal to Three [Member]
Debt Instrument [Line Items]
Adjusted Rate		1.75%
Revolving Credit Facility [Member] \| LIBO Rate [Member] \| Debt Ratio Less Than or Equal to Four Point Two Five [Member]
Debt Instrument [Line Items]
Adjusted Rate		2.00%
Ratio of indebtedness to net capital one		4.25
Ratio of indebtedness to net capital minimum		1
Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Adjusted Rate		1.25%
Ratio of indebtedness to net capital one		3.00
Ratio of indebtedness to net capital minimum		1
Revolving Credit Facility [Member] \| Base Rate [Member] \| Debt Ratio Less Than or Equal to Three [Member]
Debt Instrument [Line Items]
Adjusted Rate		0.75%
Revolving Credit Facility [Member] \| Base Rate [Member] \| Debt Ratio Less Than or Equal to Four Point Two Five [Member]
Debt Instrument [Line Items]
Adjusted Rate		1.00%
Ratio of indebtedness to net capital one		4.25
Ratio of indebtedness to net capital minimum		1
Letter of Credit [Member]
Debt Instrument [Line Items]
Letter of credit outstanding balance						10,104,000
LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Proceeds received from senior credit facility						300,000,000	300,000,000
Loss on extinguishment of debt						$ 3,198,000	$ 26,023,000
LAMAR MEDIA CORP [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date						Feb. 02, 2019
5 7/8% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes					5.875%	5.875%		5.875%
Aggregate principal amount of debt issued					$ 500,000,000
Net proceeds from the issuance of debt					$ 489,000,000
Redemption percentage equal to principal amount include aggregate premium					100.00%
Redemption price percentage of the principal amount to be purchased					101.00%
5 7/8% Senior Subordinated Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes						5.875%		5.875%
5% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes				5.00%		5.00%		5.00%
Aggregate principal amount of debt issued				$ 535,000,000
Net proceeds from the issuance of debt				$ 527,100,000
Redemption percentage equal to principal amount include aggregate premium				100.00%
Redemption price percentage of the principal amount to be purchased				101.00%
5% Senior Subordinated Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes						5.00%		5.00%
5 3/8% Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes			5.375%			5.375%		5.375%
Aggregate principal amount of debt issued			$ 510,000,000
Net proceeds from the issuance of debt			$ 502,300,000
Redemption price percentage of the principal amount to be purchased			101.00%
5 3/8% Senior Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes						5.375%		5.375%
5 3/8% Senior Notes [Member] \| Prior to January 15, 2017 [Member]
Debt Instrument [Line Items]
Redemption percentage of aggregate principal amount of senior notes			35.00%
Additional redeemed percentage of aggregate principal amount			105.375%
Redemption percentage of issued notes which remain outstanding			65.00%
Debt instrument redemption period			120 days
5 3/8% Senior Notes [Member] \| Prior to January 15, 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage equal to principal amount include aggregate premium			100.00%
5 3/4% Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes	5.75%					5.75%
Aggregate principal amount of debt issued	$ 400,000,000
Net proceeds from the issuance of debt	$ 394,500,000
Redemption price percentage of the principal amount to be purchased	101.00%
5 3/4% Senior Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes						5.75%
5 3/4% Senior Notes [Member] \| Prior to February 1, 2019 [Member]
Debt Instrument [Line Items]
Redemption percentage of aggregate principal amount of senior notes	35.00%
Additional redeemed percentage of aggregate principal amount	105.75%
Redemption percentage of issued notes which remain outstanding	65.00%
5 3/4% Senior Notes [Member] \| Prior to February 1, 2021 [Member]
Debt Instrument [Line Items]
Additional redeemed percentage of aggregate principal amount	100.00%
Senior Credit Facility [Member]
Debt Instrument [Line Items]
Ratio of indebtedness to net capital one						3.5
Senior Credit Facility [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing limit of incremental loan facility									$ 400,000,000
Incremental Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing limit of incremental loan facility									$ 500,000,000
Incremental Facility [Member] \| Term A Loan Facility [Member]
Debt Instrument [Line Items]
Incremental loan limit eliminated as per amendment		$ 500,000,000
Ratio of indebtedness to net capital one		3.5
7 7/8% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Interest rate on convertible notes		7.875%
Aggregate principal amount of debt issued		$ 400,000,000
Accounting Standards Update 2015-03 [Member] \| Long Term Debt Current Maturities [Member]
Debt Instrument [Line Items]
Cumulative effect to total assets, current maturities of long-term debt and long term debt due to adoption of ASU 2015-03								$ 4,823,000
Accounting Standards Update 2015-03 [Member] \| Long Term Debt Non- Current [Member]
Debt Instrument [Line Items]
Cumulative effect to total assets, current maturities of long-term debt and long term debt due to adoption of ASU 2015-03								23,211,000
Accounting Standards Update 2015-03 [Member] \| Assets [Member]
Debt Instrument [Line Items]
Cumulative effect to total assets, current maturities of long-term debt and long term debt due to adoption of ASU 2015-03								$ 28,034,000