XML 46 R35.htm IDEA: XBRL DOCUMENT
v3.24.3

Note 1 - Basis of Presentation - Proceeds Received for Project (Details) - Sale Agreement with the Doraville Community Improvement District [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Proceeds received in advance of asset sale | $ 0 | $ 0 | $ 0 | $ 9
Proceeds for reimbursement of development costs | 0 | 0 | 6 | 29
Total proceeds received from CID | $ 0 | $ 0 | $ 6 | $ 38

X
- Definition The amount of advance proceeds received from asset sale. + References No definition available. + Details
Name: | gtn_AdvanceProceedsReceivedFromAssetSale
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of proceeds for reimbursement of development costs. + References No definition available. + Details
Name: | gtn_ProceedsForReimbursementOfDevelopmentCosts
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of total proceeds from project. + References No definition available. + Details
Name: | gtn_TotalProceedsFromProject
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=gtn_SaleAgreementWithTheDoravilleCommunityImprovementDistrictMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |