Long-term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long Term Debt	$ 1,919,484	$ 1,899,895
Less current maturities	(21,332)	(15,625)
Long-term debt excluding current maturities	1,898,152	1,884,270
LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Long Term Debt	1,919,484	1,899,895
Less current maturities	(21,332)	(15,625)
Long-term debt excluding current maturities	1,898,152	1,884,270
Senior Credit Facility [Member]
Debt Instrument [Line Items]
Long Term Debt	373,750	353,750
Senior Credit Facility [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Long Term Debt	373,750	353,750
5 7/8% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Long Term Debt	500,000	500,000
5 7/8% Senior Subordinated Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Long Term Debt	500,000	500,000
5% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Long Term Debt	535,000	535,000
5% Senior Subordinated Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Long Term Debt	535,000	535,000
5 3/8% Senior Notes [Member]
Debt Instrument [Line Items]
Long Term Debt	510,000	510,000
5 3/8% Senior Notes [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Long Term Debt	510,000	510,000
Other Notes with Various Rates and Terms [Member]
Debt Instrument [Line Items]
Long Term Debt	734	1,145
Other Notes with Various Rates and Terms [Member] \| LAMAR MEDIA CORP [Member]
Debt Instrument [Line Items]
Long Term Debt	$ 734	$ 1,145

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.

No definition available.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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