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Long-term Debt - Schedule of Maturities of Long Term Debt (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
March 31, 2015-March 31, 2016 [Member] |
Debt Instrument [Line Items] |
Principal payment amount | $ 3,750 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_LongtermDebtTypeAxis = lamr_MarchThirtyOneTwoThousandFifteenToMarchThirtyOneTwoThousandSixteenMember
June 30, 2016- March 31, 2017 [Member] |
Debt Instrument [Line Items] |
Principal payment amount | 5,625 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_LongtermDebtTypeAxis = lamr_JuneThirtyTwoThousandSixteenToMarchThirtyFirstTwoThousandSeventeenMember
June 30, 2017-December 31, 2018 [Member] |
Debt Instrument [Line Items] |
Principal payment amount | 11,250 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_LongtermDebtTypeAxis = lamr_JuneThirtyTwoThousandSeventeenToDecemberThirtyOneTwoThousandEighteenMember
Term A Loan Maturity Date [Member] |
Debt Instrument [Line Items] |
Principal payment amount | $ 168,750 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_LongtermDebtTypeAxis = lamr_TermaLoanMaturityDateMember

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- Definition Amount of the required periodic payments applied to principal. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

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