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Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 LAMAR MEDIA CORP [Member] | Dec. 31, 2012 LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Minimum [Member] | Dec. 31, 2013 Maximum [Member] | Dec. 31, 2013 Customer lists and contracts [Member] | Dec. 31, 2012 Customer lists and contracts [Member] | Dec. 31, 2013 Customer lists and contracts [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2012 Customer lists and contracts [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Customer lists and contracts [Member] Minimum [Member] | Dec. 31, 2013 Customer lists and contracts [Member] Minimum [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Customer lists and contracts [Member] Maximum [Member] | Dec. 31, 2013 Customer lists and contracts [Member] Maximum [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Non-competition agreements [Member] | Dec. 31, 2012 Non-competition agreements [Member] | Dec. 31, 2013 Non-competition agreements [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2012 Non-competition agreements [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Non-competition agreements [Member] Minimum [Member] | Dec. 31, 2013 Non-competition agreements [Member] Minimum [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Non-competition agreements [Member] Maximum [Member] | Dec. 31, 2013 Non-competition agreements [Member] Maximum [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Site locations [Member] | Dec. 31, 2012 Site locations [Member] | Dec. 31, 2013 Site locations [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2012 Site locations [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Site locations [Member] Maximum [Member] | Dec. 31, 2013 Site locations [Member] Maximum [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Other [Member] | Dec. 31, 2012 Other [Member] | Dec. 31, 2013 Other [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2012 Other [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Other [Member] Minimum [Member] | Dec. 31, 2013 Other [Member] Minimum [Member] LAMAR MEDIA CORP [Member] | Dec. 31, 2013 Other [Member] Maximum [Member] | Dec. 31, 2013 Other [Member] Maximum [Member] LAMAR MEDIA CORP [Member]
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Life (Years) |  |  |  |  | 3 years | 15 years |  |  |  |  | 7 years | 7 years | 10 years | 10 years |  |  |  |  | 3 years | 3 years | 15 years | 15 years |  |  |  |  | 15 years | 15 years |  |  |  |  | 5 years | 5 years | 15 years | 15 years
Gross Carrying Amount | $ 2,065,875 | $ 2,009,191 | $ 2,065,330 | $ 2,008,646 |  |  | $ 492,299 | $ 482,883 | $ 492,299 | $ 482,883 |  |  |  |  | $ 63,933 | $ 63,519 | $ 63,933 | $ 63,519 |  |  |  |  | $ 1,495,635 | $ 1,449,181 | $ 1,495,635 | $ 1,449,181 |  |  | $ 14,008 | $ 13,608 | $ 13,463 | $ 13,063 |  |  |  |
Accumulated Amortization | 1,646,490 | 1,540,879 | 1,646,411 | 1,540,809 |  |  | 463,188 | 455,549 | 463,188 | 455,549 |  |  |  |  | 62,914 | 62,566 | 62,914 | 62,566 |  |  |  |  | 1,106,947 | 1,009,631 | 1,106,945 | 1,009,631 |  |  | 13,441 | 13,133 | 13,364 | 13,063 |  |  |  |
Goodwill gross carrying amount | 1,757,089 | 1,738,686 | 1,746,068 | 1,727,665 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill accumulated amortization | $ 253,536 | $ 253,536 | $ 252,667 | $ 252,667 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- 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=14024403&loc=d3e13816-109267 + Details
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