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v2.4.1.9

Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2,108,541 us-gaap_FiniteLivedIntangibleAssetsGross | $ 2,065,875 us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization | 1,741,556 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 1,646,490 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Goodwill gross carrying amount | 1,766,304 us-gaap_GoodwillGross | 1,757,089 us-gaap_GoodwillGross
Goodwill accumulated amortization | 253,536 lamr_GoodwillAccumulatedAmortization | 253,536 lamr_GoodwillAccumulatedAmortization
LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2,107,997 us-gaap_FiniteLivedIntangibleAssetsGross / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 2,065,330 us-gaap_FiniteLivedIntangibleAssetsGross / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Accumulated Amortization | 1,741,479 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 1,646,411 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Goodwill gross carrying amount | 1,755,283 us-gaap_GoodwillGross / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 1,746,068 us-gaap_GoodwillGross / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Goodwill accumulated amortization | 252,667 lamr_GoodwillAccumulatedAmortization / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 252,667 lamr_GoodwillAccumulatedAmortization / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 3 years |
Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Customer Lists and Contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 499,310 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember | 492,299 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember
Accumulated Amortization | 470,170 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember | 463,188 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember
Customer Lists and Contracts [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 499,311 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 492,299 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Accumulated Amortization | 470,170 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 463,188 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_CustomerListsAndContractsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Customer Lists and Contracts [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 7 years |
Customer Lists and Contracts [Member] | Minimum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 7 years |
Customer Lists and Contracts [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 10 years |
Customer Lists and Contracts [Member] | Maximum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 10 years |
Non-competition Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 64,062 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember | 63,933 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Accumulated Amortization | 63,192 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember | 62,914 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Non-competition Agreements [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 64,062 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 63,933 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Accumulated Amortization | 63,192 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 62,914 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Non-competition Agreements [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 3 years |
Non-competition Agreements [Member] | Minimum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 3 years |
Non-competition Agreements [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Non-competition Agreements [Member] | Maximum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Site Locations [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,531,161 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember | 1,495,635 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember
Accumulated Amortization | 1,194,709 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember | 1,106,947 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember
Site Locations [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,531,161 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 1,495,635 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Accumulated Amortization | 1,194,709 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 1,106,945 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = lamr_SiteLocationsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Site Locations [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Site Locations [Member] | Maximum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 14,008 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 14,008 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Accumulated Amortization | 13,485 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 13,441 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Other [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 13,463 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 13,463 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Accumulated Amortization | 13,408 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 13,364 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Other [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 5 years |
Other [Member] | Minimum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 5 years |
Other [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Other [Member] | Maximum [Member] | LAMAR MEDIA CORP [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |

X
- Definition The accumulated amount of amortization of goodwill as of the balance sheet date. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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