XML 86 R73.htm IDEA: XBRL DOCUMENT
v3.20.4

Depreciation and Amortization - Depreciation and Amortization Expense Excluded from Operating Expenses in its Consolidated Statements of Income and Comprehensive Income (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Depreciation and Amortization Expense [Line Items] |  |  |
Depreciation and amortization | $ 251,296 | $ 250,028 | $ 225,261
Direct Expenses [Member] |  |  |
Depreciation and Amortization Expense [Line Items] |  |  |
Depreciation and amortization | 236,054 | 235,544 | 212,585
General and Administrative Expenses [Member] |  |  |
Depreciation and Amortization Expense [Line Items] |  |  |
Depreciation and amortization | 4,996 | 4,416 | 4,134
Corporate Expenses [Member] |  |  |
Depreciation and Amortization Expense [Line Items] |  |  |
Depreciation and amortization | $ 10,246 | $ 10,068 | $ 8,542

X
- Definition Depreciation and amortization expense. + References No definition available. + Details
Name: | lamr_DepreciationAndAmortizationExpenseLineItems
Namespace Prefix: | lamr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationAmortizationAndAccretionNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=lamr_AdvertisementExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=lamr_CorporateExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |