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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Exercise of stock options	522,032us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	682,263us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	586,563us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Purchase of treasury stock	54,295us-gaap_TreasuryStockSharesAcquired	97,430us-gaap_TreasuryStockSharesAcquired	36,553us-gaap_TreasuryStockSharesAcquired
Retirement of treasury stock	17,270,930us-gaap_TreasuryStockSharesRetired
Common stock dividends/distributions	$ 2.50us-gaap_CommonStockDividendsPerShareDeclared
Preferred stock dividend shares	$ 63.80lamr_PreferredStockDividendShares	$ 63.80lamr_PreferredStockDividendShares	$ 63.80lamr_PreferredStockDividendShares
Treasury Stock [Member]
Purchase of treasury stock	54,295us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	97,430us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	36,553us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Retirement of treasury stock	17,270,930us-gaap_TreasuryStockSharesRetired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Additional Paid-in Capital [Member]
Exercise of stock options	522,032us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	682,263us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	586,563us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Accumulated Deficit [Member]
Common stock dividends/distributions	$ 2.50us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Preferred stock dividend shares	$ 63.80lamr_PreferredStockDividendShares / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ 63.80lamr_PreferredStockDividendShares / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ 63.80lamr_PreferredStockDividendShares / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember

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Consideration paid per share for dividends of preferred stock.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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