XML 50 R40.htm IDEA: XBRL DOCUMENT
v3.20.2

Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 3,161,941 | $ 3,142,112
Accumulated Amortization | 2,232,258 | 2,149,868
Goodwill gross carrying amount | 2,165,746 | 2,165,810
Goodwill accumulated amortization | 253,536 | 253,536
Customer Lists and Contracts [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 644,684 | 641,714
Accumulated Amortization | $ 557,239 | 539,405
Customer Lists and Contracts [Member] | Minimum [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 |
Non-competition Agreements [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 66,102 | 66,014
Accumulated Amortization | $ 64,579 | 64,379
Non-competition Agreements [Member] | Minimum [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 |
Site Locations [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 2,401,175 | 2,384,520
Accumulated Amortization | $ 1,572,008 | 1,509,335
Site Locations [Member] | Maximum [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 15 years |
Other [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 49,980 | 49,864
Accumulated Amortization | $ 38,432 | $ 36,749
Other [Member] | Minimum [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Estimated Life (Years) | 2 years |
Other [Member] | Maximum [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
Name: | lamr_GoodwillAccumulatedAmortization
Namespace Prefix: | lamr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lamr_CustomerListsAndContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=lamr_SiteLocationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OtherIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |