XML 20 R70.htm IDEA: XBRL DOCUMENT v2.4.1.9

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Tax adjustment related dividend paid deduction	$ 62,937us-gaap_IncomeTaxReconciliationDeductionsDividends
Rate change	91us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate	(2,565)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate	49us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
LAMAR MEDIA CORP [Member]
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Tax adjustment related dividend paid deduction	63,058us-gaap_IncomeTaxReconciliationDeductionsDividends / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Rate change	91us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember	(2,565)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember	49us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Puerto Rico [Member]
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Corporate income tax rate		39.00%lamr_CorporateIncomeTaxRate / us-gaap_StatementGeographicalAxis = country_PR	30.00%lamr_CorporateIncomeTaxRate / us-gaap_StatementGeographicalAxis = country_PR
Rate change		2,479us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / us-gaap_StatementGeographicalAxis = country_PR
Puerto Rico [Member] | LAMAR MEDIA CORP [Member]
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Corporate income tax rate		39.00%lamr_CorporateIncomeTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_StatementGeographicalAxis = country_PR	30.00%lamr_CorporateIncomeTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_StatementGeographicalAxis = country_PR
Rate change		2,479us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_StatementGeographicalAxis = country_PR
British Columbia Bill 2 [Member]
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Rate change		86us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / us-gaap_StatementGeographicalAxis = lamr_BritishColumbiaBillTwoMember
Change in general corporate income tax rate		11.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate / us-gaap_StatementGeographicalAxis = lamr_BritishColumbiaBillTwoMember	10.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate / us-gaap_StatementGeographicalAxis = lamr_BritishColumbiaBillTwoMember
British Columbia Bill 2 [Member] | LAMAR MEDIA CORP [Member]
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Rate change		$ 86us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_StatementGeographicalAxis = lamr_BritishColumbiaBillTwoMember
Change in general corporate income tax rate		11.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_StatementGeographicalAxis = lamr_BritishColumbiaBillTwoMember	10.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_StatementGeographicalAxis = lamr_BritishColumbiaBillTwoMember

X

- Definition

Puerto Rico tax rate.

+ References

No definition available.

+ Details

Name:	lamr_CorporateIncomeTaxRate
Namespace Prefix:	lamr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	lamr_ScheduleOfEffectiveIncomeTaxRateReconciliationLineItems
Namespace Prefix:	lamr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 6.I)

-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32059-109318

+ Details

Name:	us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

+ Details

Name:	us-gaap_IncomeTaxReconciliationDeductionsDividends
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_PR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=lamr_BritishColumbiaBillTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: