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v3.22.2.2

Note 10 - Commitments and Contingencies (Details Textual) - Forecast [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Expected Capital Expenditures To Be Incurred, Net |  |  |  | $ 73 | $ 201
Expected Incentive Payments to be Received |  | $ 43 | $ 59 |  |
Additional Expected Incentive Payments to be Received | $ 20 |  |  |  |

X
- Definition Amount of additional expected incentive payments to be received. + References No definition available. + Details
Name: | gtn_AdditionalExpectedIncentivePaymentsToBeReceived
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected capital expenditures to be incurred, net of proceeds from property sales and incentive payments received. + References No definition available. + Details
Name: | gtn_ExpectedCapitalExpendituresToBeIncurredNet
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of expected incentive payments to be received. + References No definition available. + Details
Name: | gtn_ExpectedIncentivePaymentsToBeReceived
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |