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Accrued Expenses - Summary of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Accounts Payable And Accrued Liabilities Current [Line Items] |  |
Payroll | $ 13,852 us-gaap_EmployeeRelatedLiabilitiesCurrent | $ 11,311 us-gaap_EmployeeRelatedLiabilitiesCurrent
Interest | 29,281 us-gaap_InterestPayableCurrent | 23,451 us-gaap_InterestPayableCurrent
Insurance benefits | 12,853 us-gaap_AccruedInsuranceCurrent | 13,090 us-gaap_AccruedInsuranceCurrent
Accrued lease expense | 35,903 lamr_AccruedLeaseExpenses | 37,346 lamr_AccruedLeaseExpenses
Other | 16,901 us-gaap_OtherAccruedLiabilitiesCurrent | 13,726 us-gaap_OtherAccruedLiabilitiesCurrent
Total | 108,790 us-gaap_AccruedLiabilitiesCurrent | 98,924 us-gaap_AccruedLiabilitiesCurrent
LAMAR MEDIA CORP [Member] |  |
Accounts Payable And Accrued Liabilities Current [Line Items] |  |
Payroll | 13,852 us-gaap_EmployeeRelatedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 11,311 us-gaap_EmployeeRelatedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Interest | 29,281 us-gaap_InterestPayableCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 23,451 us-gaap_InterestPayableCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Accrued lease expense | 35,903 lamr_AccruedLeaseExpenses / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 37,346 lamr_AccruedLeaseExpenses / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Other | 25,971 us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 23,524 us-gaap_OtherAccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Total | $ 105,007 us-gaap_AccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 95,632 us-gaap_AccruedLiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765 + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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